Electric tool

Abstract

The present invention relates to an electric tool, comprising: a host; a working part and a motor; when the pushing hand component is in the working state, the pushing hand component can be fixed at a first position; when the pushing handle component rotates from the first position to a third position, the pushing handle component can be switched from the working state to the storage state; when the pushing hand part is located at the first position, the signal unit feeds back a first state signal; when the push handle part is located at the third position, the signal unit feeds back a second state signal different from the first state signal; the electric tool further comprises a control circuit, the control circuit controls the motor to start working according to the received first state signal and a first control logic, and the control circuit controls the motor to start working according to the received second state signal and a second control logic. The second control logic is different from the first control logic.

Description

[0001] This application is a divisional application of the Chinese patent application for invention name of "Electric power tool", application number of CN202310768279.7, filed on June 27, 2023. TECHNICAL FIELD

[0002] The present application relates to the technical field of electric equipment, in particular to the motor control of electric power tool. BACKGROUND

[0003] With the continuous expansion of urban green areas, the green belts of public places such as parks and roads are spread throughout the country, and electric garden tools are also widely used, such as lawn mowers, pruning machines, etc. For garden tools such as lawn mowers, it is often necessary to perform scene switching operations between different work sites. For push rod storable lawn mowers, in order to save transportation space during transportation, the operator usually rotates the push rod of the lawn mower to the storage state first. During the rotation of the push rod or in the storage state, the operator is most likely to accidentally trigger the motor switch, causing the push rod to be in the storage process or in the storage state, and the operator can still normally start the lawn mower. At this time, the operator is too close to the lawn mower and is in danger, which brings great safety hazards to the operator. SUMMARY

[0004] Therefore, it is necessary to provide an electric power tool to increase the difficulty of starting the motor of the electric power tool under abnormal working conditions and reduce the probability of accidental triggering during transportation or transfer.

[0005] One embodiment of the present application provides an electric power tool, comprising: a main body; a functional component, comprising a working part and a motor driving the working part to work; a motor start switch, being controlled by a user's operation, to control the motor; a handle component, connected to the main body, the handle component being rotatable around the main body, a rotation area of the handle component comprising a working position area and a non-working position area, when the handle component is in the working position area, the handle component is relatively fixed to the main body, for a user to operate to push the main body to move; an adjusting member and a matching member, when the adjusting member matches the matching member, the handle component is locked to the main body, when the adjusting member is disengaged from the matching member, the handle component is disengaged from the main body and is rotatable around the main body; a signal unit, the signal unit being used to feedback different state signals in response to a position change of the handle component, when the handle component is in the working position area and the handle component is relatively locked to the main body, the signal unit can feedback a first state signal, when the handle component is in the non-working position area, the signal unit feedbacks a second state signal; a control circuit, being used to receive the state signals feedbacked by the signal unit, and adjust a control logic of starting the motor according to the received different state signals, when the control circuit receives the first state signal, the control circuit controls the motor to start working according to a first control logic, when the control circuit receives the second state signal, the control circuit controls the motor to start working according to a second control logic, the second control logic being different from the first control logic.

[0006] In one embodiment, the electric power tool comprises a power-on switch, the power-on switch being triggered by a user's operation to make the control circuit switch between an inactivation state and an activation state, when the control circuit is in the activation state, the control circuit allows a current of a power supply to flow to the motor, when the control circuit is in the inactivation state, the control circuit prohibits the current of the power supply to flow to the motor, wherein a trigger holding time of the power-on switch is defined as a time from when the power-on switch is triggered to when the control circuit switches from the inactivation state to the activation state; the motor start switch comprises a first operation element, the first operation element outputs a motor start signal in response to a user's operation, when the control circuit is in the activation state and the first operation element is triggered, the control circuit controls the current of the power supply to flow to the motor to make the motor drive the working part to work, wherein the control circuit enters the activation state to allow the motor start signal to be received within a preset time, the preset time is defined as an allowed trigger time of the first operation element; the trigger holding time of the power-on switch is different under the first control logic and the second control logic; and / or the allowed trigger time of the first operation element is different under the first control logic and the second control logic.

[0007] In one embodiment, the control circuit further comprises a timing unit, so that the control circuit determines whether the trigger holding time of the power-on switch meets a preset condition according to the timing time of the timing unit, and / or the control circuit further comprises a timing unit, so that the control circuit determines whether the allowed trigger time of the first operating element meets a preset condition according to the timing time of the timing unit.

[0008] In one embodiment, the first control logic at least includes: when the trigger holding time of the power-on switch reaches a first holding time, the control circuit is allowed to enter an active state; and the second control logic at least includes: when the trigger holding time of the power-on switch reaches a second holding time, the control circuit is allowed to enter an active state; wherein the second holding time is greater than the first holding time, and the second holding time is greater than or equal to 3 times the first holding time.

[0009] In one embodiment, the first control logic further includes: when the control circuit enters the active state, the allowed trigger time of the first operating element is configured within a first preset time, and the control circuit receives a motor start signal within the first preset time, controls the current from the power supply to flow to the motor, and drives the working part of the motor to work; and the second control logic at least includes: when the control circuit enters the active state, the allowed trigger time of the first operating element is configured within a second preset time, and the control circuit receives a motor start signal within the second preset time, controls the current from the power supply to flow to the motor, and drives the working part of the motor to work, wherein the second preset time is less than the first preset time.

[0010] In one embodiment, the second control logic at least includes: the allowed trigger time of the motor start switch is configured as a preset fixed time point interval from the control circuit entering the active state, and the control circuit allows receiving a motor start signal at the fixed time point to control the current from the power supply to flow to the motor, and drive the working part of the motor to work.

[0011] In one embodiment, the second holding time is greater than or equal to 2s; and the second preset time is less than or equal to 5s.

[0012] In one embodiment, the second control logic at least includes: the allowed trigger time of the first operating element is configured as a fixed time point interval from the control circuit entering the active state by a first preset time, and the control circuit allows receiving the motor start signal at the fixed time point to control the current from the power supply to flow to the motor, and drive the working part of the motor to work.

[0013] In one embodiment, the motor start switch further includes an unlocking element configured to output an unlocking signal in response to a user operation; the first control logic includes at least: when the control circuit enters the active state, the continuous triggering time of the unlocking element from the time it is triggered until the control circuit receives the unlocking signal reaches a third holding time, and the control circuit allows receiving the motor start signal to control the current flow of the power supply to the motor according to the motor start signal, so that the motor drives the working part to work; the second control logic includes at least: when the control circuit enters the active state, the continuous triggering time of the unlocking element from the time it is triggered until the control circuit receives the unlocking signal reaches a fourth holding time, and the control circuit allows receiving the motor start signal to control the current flow of the power supply to the motor according to the motor start signal, so that the motor drives the working part to work; the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times the third holding time.

[0014] In one embodiment, the motor start switch further includes an unlocking element configured to output an unlocking signal in response to a user operation. After receiving the unlocking signal, the control circuit is allowed to receive the motor start signal. The second control logic includes at least: the control circuit enters the active state, and a preset fixed time interval exists between the control circuit entering the active state and the control circuit receiving the unlocking signal.

[0015] In one embodiment, the power tool further includes a power mounting section for mounting a power source, the power source including a battery pack detachably connected to the power mounting section to power the power tool, and the control circuit entering an active state in response to the battery pack being mounted to the power mounting section; the motor start switch includes an unlocking element and a first operating element, the unlocking element outputting an unlock signal in response to user operation, and the first operating element outputting a motor start signal in response to user operation; the first control logic further includes: when the control circuit enters the active state, the continuous triggering time of the unlocking element from being triggered until the control circuit receives the unlock signal reaches a third holding time, the control... The control circuit allows receiving the motor start signal and controls the current flow of the power supply to the motor according to the motor start signal, so that the motor drives the working part to work; the second control logic further includes: when the control circuit enters the activated state, the unlocking element is allowed to receive the motor start signal and control the current flow of the power supply to the motor according to the motor start signal, so that the motor drives the working part to work; the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times the third holding time.

[0016] In one embodiment, the first control logic further includes: the control circuit allows receiving a motor start signal within a first preset time period; the second control logic further includes: the control circuit allows receiving a motor start signal within a second preset time period, the second preset time being shorter than the first preset time period.

[0017] In one embodiment, the second control logic further includes: the control circuit allows receiving a motor start signal at fixed time points at preset intervals starting from the fourth holding time.

[0018] In one embodiment, when the signal unit feeds back a first state signal, the control circuit allows the motor to start working at least at a first speed; when the signal unit feeds back a second state signal, the control circuit allows the motor to start working at least at a second speed, the second speed being no greater than one-third of the first speed.

[0019] In one embodiment, the second rotational speed is no more than one-fifth of the first rotational speed.

[0020] In one embodiment, the control circuit is further configured to control the motor to run at a second speed for a preset time and then stop, wherein the preset time is less than or equal to 5 seconds.

[0021] In one embodiment, the power tool includes a push lawnmower; the motor includes a cutting motor, the working part includes a cutting part, the cutting motor is used to drive the cutting part to move in order to perform cutting work; and / or the motor includes a self-driven motor, the working part includes a moving component, the self-driven motor is used to drive the moving component to move in order to move the main unit.

[0022] In one embodiment, the signal unit includes a micro switch, the signal unit being configured as a micro switch, the micro switch including a trigger and a switching element, the switching element being controlled by the trigger, the micro switch switching between an off state and an on state in response to the pusher component changing between the working position area and the non-working position area, wherein when the micro switch is in the off state or the on state, the signal unit selectively feeds back either a first state signal or a second state signal.

[0023] In one embodiment, the signal unit is configured as a sensor, the sensor including a first component and a second component, one of the first component and the second component being disposed on the host and the other being disposed on the pusher component or the adjustment component, the first component being configured to feed back a first state signal or a second state signal to the control circuit based on the strength of the signal emitted by the second component.

[0024] A motor control method for an electric tool, wherein the electric tool includes: a main unit; a functional component including a working part and a motor driving the working part; a motor start switch, controlling the motor in response to user operation; a push handle component connected to the main unit, the push handle component being rotatable around the main unit, the rotation area of ​​the push handle component including a working position area and a non-working position area, wherein when the push handle component is in the working position area, the push handle component is relatively fixed to the main unit and is used for user operation to push the main unit to move; an adjusting member and a mating member, wherein when the adjusting member and the mating member are engaged, the push handle component is locked to the main unit, and when the adjusting member and the mating member are disengaged, the push handle component is unlocked from the main unit and can rotate around the main unit; a signal unit, the signal unit being used to respond to changes in the position of the push handle component by feeding back different state signals, wherein when the push handle component is in the working position area and the push handle component is relatively locked to the main unit, the signal unit feeds back a first state signal, and when the push handle component is in the non-working position area, the signal unit feeds back a second state signal;

[0025] The motor control method includes: receiving a status signal fed back by a signal unit; when the status signal is a first status signal, controlling the motor to start working according to a first control logic; when the status signal is a second status signal, controlling the motor to start working according to a second control logic, wherein the second control logic is different from the first control logic.

[0026] In one embodiment, the control circuit includes a power-on switch, which is triggered in response to a user operation to switch the control circuit between an inactive state and an active state. When the control circuit is in the active state, it allows current from the power supply to flow to the motor; when the control circuit is in the inactive state, it prevents current from flowing to the motor. The time it takes for the power-on switch to remain in the triggered state until the control circuit switches from the inactive state to the active state is defined as the trigger-hold time of the power-on switch. The motor start switch includes a first operating element. The first operating element is used to output a motor start signal in response to a user operation. The control circuit is in the activated state and the motor start switch is triggered. The control circuit controls the current flow of the power supply to the motor so that the motor drives the working part to work. The control circuit enters the activated state and is allowed to receive the motor start signal for a preset time. The preset time is defined as the allowed trigger time of the motor start switch. Under the first control logic and the second control logic, the trigger holding time of the power-on switch is different; and / or under the first control logic and the second control logic, the allowed trigger time of the motor start switch is different.

[0027] In one embodiment, the first control logic includes at least: determining whether the trigger hold time of the power-on switch has reached a first hold time; if the first hold time is reached, allowing the control circuit to enter the active state; the second control logic includes at least: determining whether the trigger hold time of the power-on switch has reached a second hold time; if the second hold time is reached, allowing the control circuit to enter the active state, wherein the second hold time is greater than or equal to three times the first hold time.

[0028] In one embodiment, the first control logic further includes: the control circuit entering the activated state, allowing the receiving of the motor start signal for a first preset time; and upon receiving the motor start signal, controlling the current from the power supply to flow to the motor, so that the motor drives the working part to work;

[0029] The second control logic includes at least the following: when the control circuit enters the activated state, it is allowed to receive the motor start signal within a second preset time. When the motor start signal is received, the current from the power supply is controlled to flow to the motor so that the motor drives the working part to work. The second preset time is less than the first preset time.

[0030] In one embodiment, the second control logic includes at least: allowing the receiving of the motor start signal at a fixed point after a preset time interval from the start of the control circuit entering the active state; and controlling the current from the power supply to flow to the motor when the motor start signal is received, so that the motor drives the working part to work, wherein the second preset time is less than the first preset time.

[0031] In one embodiment, the second holding time is greater than or equal to 2 seconds; the second preset time is less than or equal to 5 seconds.

[0032] In one embodiment, the motor start switch further includes an unlocking element, the unlocking element including a stop operably coupled to a first operating element to prevent the first operating element from being directly actuated.

[0033] In one embodiment, the motor start switch further includes an unlocking element that responds to an unlocking signal output by a user operation; the first control logic includes at least: the control circuit enters the active state and determines whether the continuous triggering time of the unlocking element reaches a third holding time; upon reaching the third holding time, it allows receiving the motor start signal, and upon receiving the motor start signal, it controls the current from the power supply to flow to the motor so that the motor drives the working part to work; the second control logic includes at least: the control circuit enters the active state and determines whether the continuous triggering time of the unlocking element reaches a fourth holding time; upon reaching the fourth holding time, it allows receiving the motor start signal, and upon receiving the motor start signal, it controls the current from the power supply to flow to the motor so that the motor drives the working part to work; the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times the third holding time.

[0034] In one embodiment, the motor start switch further includes an unlocking element configured to output an unlocking signal in response to a user operation, and the control circuit, upon receiving the unlocking signal, is allowed to receive the motor start signal; the second control logic includes at least: the control circuit entering the active state, and a second preset time interval between the control circuit entering the active state and the control circuit receiving the unlocking signal.

[0035] In one embodiment, the first control logic further includes: from the time the unlocking element remains in the triggered state after being triggered until the third holding time is reached, allowing the motor start signal to be received within a first preset time;

[0036] The second control logic further includes: from the time the unlocking element has been triggered and maintained in the triggered state for the duration of the fourth holding time, allowing the receiving of the motor start signal within a second preset time period; or from the time the unlocking element has been triggered and maintained in the triggered state for the duration of the fourth holding time, allowing the receiving of the motor start signal at fixed time points at preset intervals, wherein the second preset time period is less than the first preset time period.

[0037] In one embodiment, the power tool further includes a power supply mounting section, the power supply including a battery pack, the battery pack being detachably mounted to the power supply mounting section to power the power tool, and a control circuit entering an active state in response to the battery pack being mounted to the battery pack mounting section; the control circuit includes a motor start switch, the motor start switch including an unlocking element and a first operating element, the unlocking element being used to respond to a user triggering an unlocking signal, and the first operating element being used to respond to a user triggering a motor start signal; the first control logic includes at least: the control circuit entering the active state, determining whether the continuous triggering time of the unlocking element reaches a third holding time; if the third holding time is reached, allowing the receiving of a motor start signal, and upon receiving the motor start signal, controlling the current from the power supply to flow to the motor to make the motor drive the working part work; the second control logic includes at least: the control circuit entering the active state, determining whether the continuous triggering time of the unlocking element reaches a fourth holding time; if the fourth holding time is reached, allowing the receiving of a motor start signal, and upon receiving the motor start signal, controlling the current from the power supply to flow to the motor to make the motor drive the working part work; the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times the third holding time.

[0038] In one embodiment, the first control logic further includes: from the time the self-unlocking element is triggered and the time it maintains the triggered state reaches a third holding time, it is allowed to receive a motor start signal within a first preset time; the second control logic further includes: from the time the self-unlocking element is triggered and the time it maintains the triggered state reaches a fourth holding time, it is allowed to receive a motor start signal within a second preset time, the second preset time being less than the first preset time; or from the time the self-unlocking element is triggered and the time it maintains the triggered state reaches a fourth holding time, it is allowed to receive a motor start signal at fixed time points at preset time intervals.

[0039] In one embodiment, the control method further includes: when the first state signal is received, allowing the motor to start at a first speed; when the second state signal is received, allowing the motor to start at a second speed, wherein the second speed is not greater than one-third of the first speed.

[0040] In one embodiment, the control method further includes: controlling the motor to stop after controlling the motor to rotate at the second speed for a preset time.

[0041] An electric tool, characterized in that it comprises: a main unit; functional components including a working part and a motor for driving the working part; a motor start switch for controlling the motor in response to user operation; a push handle component connected to the main unit, the push handle component being rotatable around the main unit, the rotation area of ​​the push handle component including a working position area and a non-working position area, wherein when the push handle component is in the working position area, the push handle component is relatively fixed to the main unit and is used for user operation to push the main unit to move; an adjustment component and a connecting component, wherein when the adjustment component and the connecting component are engaged, the push handle component is locked to the main unit, and when the adjustment component and the connecting component are disengaged, the push handle component is unlocked from the main unit and can rotate around the main unit. The motor rotates; a signal unit is used to respond to changes in the position of the pusher component and feed back different status signals. When the pusher component is in the working position area and the pusher component is locked relative to the main unit, the signal unit feeds back a first status signal. When the pusher component is in the non-working position area, the signal unit feeds back a second status signal; a control circuit is used to receive the status signals fed back by the signal unit. When the control circuit receives the first status signal, it allows the motor to start working at a first speed. When the control unit receives the second status signal, it allows the motor to start working at a second speed, where the second speed is less than or equal to one-third of the first speed.

[0042] In one embodiment, the control circuit is further configured to control the motor to run at a second speed for a preset time and then stop, wherein the preset time is less than or equal to 5 seconds.

[0043] A method for controlling the motor of an electric tool, the electric tool comprising: a main unit; a functional component including a working part and a motor for driving the working part; a motor start switch for controlling the motor in response to user operation; a push handle component connected to the main unit, the push handle component being rotatable around the main unit, the rotation area of ​​the push handle component including a working position area and a non-working position area, wherein when the push handle component is in the working position area, the push handle component is relatively fixed relative to the main unit, for user operation to push the main unit to move; an adjusting member and a mating member, wherein when the adjusting member and the mating member are engaged, the push handle component is locked to the main unit, and when the adjusting member and the mating member are disengaged, the push handle component... It is unlocked from the host and can rotate around the host; a signal unit is used to respond to changes in the position of the pusher component and feed back different status signals. When the pusher component is in the working position area and the pusher component is locked relative to the host, the signal unit feeds back a first status signal. When the pusher component is in the non-working position area, the signal unit feeds back a second status signal. The control method includes: when the first status signal is received, the motor is allowed to start working at least at a first speed; when the second status signal is received, the motor is allowed to start working at least at a second speed, the second speed being no greater than one-third of the first speed.

[0044] An electric tool, characterized in that it comprises: a main unit; functional components including a working part and a motor for driving the working part; a motor start switch for controlling the motor in response to user operation; a push handle component connected to the main unit, the push handle component being rotatable around the main unit, the rotation area of ​​the push handle component including a working position area and a non-working position area, wherein when the push handle component is in the working position area, the push handle component is relatively fixed to the main unit and is used for user operation to push the main unit to move; an adjustment component and a mating component, wherein when the adjustment component and the mating component are engaged, the push handle component is locked to the main unit, and when the adjustment component and the mating component are disengaged, the push handle component is unlocked from the main unit and can rotate around the main unit; and a signal unit for responding to changes in the position of the push handle component and feeding back different status signals, wherein when the push handle component is in the working position area and the push handle component is not engaged, the push handle component is locked to the main unit and can rotate around the main unit; and a signal unit for responding to changes in the position of the push handle component and feeding back different status signals, wherein when the push handle component is in the working position area and the push handle component is not engaged, the push handle component is locked to the main unit and can rotate around the main unit. When locked relative to the host, the signal unit feeds back a first status signal; when the pusher component is in the non-working position area, the signal unit feeds back a second status signal. The control circuit receives the status signal fed back by the signal unit and adjusts the motor start control logic according to the status signal. When the control circuit receives the first status signal, the control circuit controls the motor to start working according to the first control logic. When the control circuit receives the second status signal, the control circuit controls the motor to start working according to the second control logic, which is different from the first control logic. When the control circuit receives the first status signal, it also allows the motor to start working at a first speed. When the control unit receives the second status signal, it also allows the motor to start working at a second speed, which is less than or equal to one-third of the first speed.

[0045] In one embodiment, the control method further includes: controlling the motor to stop after controlling the motor to rotate at the second speed for a preset time. Attached Figure Description

[0046] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A schematic diagram of the power tool in its working state provided in one embodiment of this application;

[0049] Figure 2 A schematic diagram of the power tool in an intermediate storage state provided in one embodiment of this application;

[0050] Figure 3 This is a schematic diagram of the control circuit module of a power tool provided in one embodiment of this application;

[0051] Figure 4 This is a partial schematic diagram of the pusher component structure provided in one embodiment of this application;

[0052] Figure 5 This is a cross-sectional view of a power tool structure with the operating element in a locked state, according to one embodiment of this application.

[0053] Figure 6 This is a cross-sectional view of a power tool structure with the operating element in the unlocked state, according to one embodiment of this application.

[0054] Figure 7 This is a schematic diagram of the structure of an adjustment component provided in one embodiment of this application;

[0055] Figure 8 This is an exploded view of the structure of an adjustment component provided in one embodiment of this application;

[0056] Figure 9 This is a schematic diagram of a base structure provided in one embodiment of this application;

[0057] Figure 10 This is a schematic diagram of the adjustment component structure provided in one embodiment of this application;

[0058] Figure 11A schematic diagram of the power tool in its working state, provided for yet another embodiment of this application;

[0059] Figure 12 A schematic diagram of the power tool in an intermediate storage state, as provided in yet another embodiment of this application;

[0060] Figure 13 A schematic diagram of the power tool in its fully stowed state, as provided in yet another embodiment of this application;

[0061] Figure 14 This is a schematic diagram of the signal coverage area analysis of the second component provided in one embodiment of this application;

[0062] Figure 15 Power tool start-up control process provided in one embodiment of this application Figure 1 ;

[0063] Figure 16 Power tool start-up control process provided in another embodiment of this application Figure 2 ;

[0064] Figure 17 Power tool start-up control process provided in another embodiment of this application Figure 3 ;

[0065] Figure 18 Power tool start-up control process provided in another embodiment of this application Figure 4 . Detailed Implementation

[0066] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0067] This application provides a power tool that reduces the probability of accidental activation during the folding of the handle, thereby improving the safety of the power tool. The power tool described in this application can be a push lawnmower or other types of push power tools, and is not limited to push lawnmowers.

[0068] Please refer to Figure 1 and Figure 2 The power tool 100 includes: a main unit 10, a push handle component 20, a functional component 30, a motor start switch 15, a signal unit 40, and a control circuit. Figure 1 , Figure 2 (Not shown in the image).

[0069] The functional component 30 is mounted on the main unit 10. The functional component 30 includes a motor 13 and a working part 31. The motor 13 drives the working part 31 to move the main unit 10 within a set path or working area, and / or to perform work tasks. A motor start switch 15 is used to start the motor 13 in response to user operation. The power tool also includes a power supply mounting unit for installing a power source. The power source includes a battery pack, which is detachably connected to the power supply mounting unit to supply power to the power tool. After the power tool is powered on, the motor start switch 15 can start the motor 13 in response to user operation.

[0070] The push handle component 20 is connected to the main unit 10 and can rotate around the main unit 10. The push handle component 20 has a first end and a second end, wherein the first end of the push handle component 20 is pivotally connected to the main unit 10, and the second end of the push handle component 20 can be held by the user to push the power tool 100 to move. In this embodiment, the push handle component 20 may include a push rod 21 and an extension rod 22, wherein the push rod 21 is connected to the main unit 10 through the extension rod 22. The push rod 21 is located at the second end of the push handle component 20 and is used by the user to hold it to apply a pushing force to the power tool 100, assisting the power tool 100 to move. At the same time, the user can change the direction of movement of the power tool 100 by pushing the push rod 21. For ease of storage and transportation, the push handle component 20 may also be designed as a telescopic structure, such as the push rod 21 being slidably sleeved on the extension rod 22.

[0071] The rotation area of ​​the pusher component 20 includes a working position area and a non-working position area excluding the working position area. The power tool is placed on the ground, and the direction parallel to the power tool's forward direction is defined as the power tool's longitudinal direction (see...). Figure 1-2 ),exist Figure 1-2 In this context, the left side of the power tool's longitudinal direction is defined as the front side, and the right side is defined as the rear side. When the push handle 20 is in the working position area, its second end is located relative to its first end at the rear of the main unit 10. When the push handle 20 is in at least a partial position in the non-working position area, its second end is located relative to its first end at the front of the main unit 10. Further, the working position area can generally be understood as a region within which the push handle 20 can be locked in a preset position on the main unit 10, allowing the user to push the main unit 10 to move on a plane and control the power tool to perform work tasks. In one implementation, the main unit 10 has multiple preset positions within the working position area. The push handle 20 can be locked in one of these preset positions or unlocked from one preset position and rotated to another. The non-working position area can generally be understood as a region within which the push handle 20 is rotated and folded relative to the main unit 10 to a storage state (e.g., ...). Figure 2 andFigure 12 , Figure 13 When the push handle 20 rotates to the non-working position area, the overall space occupied by the power tool can be reduced, facilitating the transportation and storage of the power tool. For example, as shown... Figure 1 As shown, when the pusher component 20 is fixed in the first position 511, the pusher component 20 is in the working position area, and at this time the pusher component 20 is in the working state. Figure 2 As shown, when the pusher component 20 is fixed in the third position 517, it is in the non-working position area and is in a retracted state. The pusher component 20 can rotate from the first position 511 to the third position 517, and vice versa. Of course, Figure 1 , Figure 2 This is just one example; in actual operation, the rotation angle corresponding to the rotation range of the pusher component 20 around the host can be greater than or equal to 90°.

[0072] The power tool 100 also includes an adjustment component 50 for adjusting the rotational position of the push handle component 20 relative to the main body 10. The adjustment component 50 includes a coupling 51 and an adjustment member 52. When the coupling 51 engages with the adjustment member 52, the push handle component 20 is locked relative to the main body 10. When the coupling 51 disengages from the adjustment member 52, the push handle component 20 is unlocked from the main body 10 and can rotate around the main body 10 under operator control. The user can fix or release the push handle component 20 by operating either the coupling 51 or the adjustment member 52. Exemplarily, one of the coupling 51 and the adjustment member 52 may be located on the main body 10, and the other on the push handle component 20.

[0073] When the power tool 100 needs to be transported, the user moves to the main unit 10 of the power tool 100 and rotates the push handle 20 to move it to a non-working area for storage. The push handle 20 is equipped with a switch assembly used to control the motor's start. If the user accidentally triggers the switch assembly while rotating the push handle 20, the power tool 100 may be powered on and started. Since the user is close to the working part at this time, it could put the user in a dangerous situation.

[0074] Based on this, the power tool 100 provided in this embodiment is further provided with a signal unit 40 on the main unit 10 and / or the pusher component 20. The signal unit 40 can respond to the position change of the pusher component 20 to feed back different status signals. When the pusher component 20 is in the working position area and the pusher component is locked relative to the main unit, the signal unit 40 feeds back a first status signal. When the pusher component 20 is in the non-working position area, the signal unit 40 feeds back a second status signal.

[0075] Furthermore, when the pusher component 20 is in the working position area and is unlocked from the host 10, different configurations of the signal unit 40, and different ways in which the signal unit with the pusher component 20 interact, may cause the signal unit 40 to feedback either a first state signal or a second state signal. The specific implementation structure for feedback of different state signals by the signal unit 40 when the pusher component 20 is in the working position area and unlocked from the host 10 will be described in detail in subsequent paragraphs.

[0076] The signal unit 40 can be a mechanical trigger switch. When the pusher component 20 moves to a preset area (working position area or non-working position area), the trigger switch is triggered or released in response to the position change of the pusher component 20, thus feeding back different status signals. The signal unit 40 can also be an electrical sensing unit. When the position of the pusher component 20 changes, the electrical sensing unit generates sensing signals of varying strengths. Different strengths of sensing signals represent different status signals. For example, if the sensing signal is below a preset threshold, the sensing switch feeds back a first status signal; if the sensing signal is above the preset threshold, the sensing switch feeds back a second status signal, and vice versa. The specific structure of the signal unit 40 will be described in detail below.

[0077] The control circuit is connected to the signal unit 40 and is used to identify the current position of the pusher component 20 based on the first and second status signals fed back by the signal unit 40, and adjust the motor start control logic accordingly. In this embodiment, the control circuit includes a main control unit, which can be a component with analysis, calculation, and control functions, such as, but not limited to, a PLC (Programmable Logic Controller), ECU (Electronic Control Unit), or a microcontroller. The main control unit is connected to the signal unit 40 and is used to receive the status signals fed back by the signal unit 40 and control the operation of the motor according to the status signals. When the main control unit receives the first status signal, indicating that the pusher component 20 is currently in the working position area, the main control unit uses the first control logic to control the motor to start working. When the main control unit receives the second status signal, the main control unit uses the second control logic to control the motor to start working, and the second control logic is different from the first control logic. It can be understood that the control circuit not only includes the main control unit, but may also include other circuits, such as any one or a combination of multiple circuits, such as a switch control circuit, a power supply circuit, etc. In this embodiment, the control circuit can be understood as the entire machine circuit.

[0078] This embodiment uses a signal unit 40 to detect the position of the pusher component 20, and a control circuit uses different control logics to start the motor 13 based on the detection results of the signal unit 40 when the pusher component 20 is in different position zones. This makes starting the motor 13 more difficult when the pusher component 20 is in different position zones. When the pusher component 20 is in the non-working position zone, the control circuit uses a second control logic to start the motor. This can be achieved by changing the action sequence of the switching components and / or extending the power-on time after the switching components are triggered. Compared to the first control logic, the second control logic makes it more difficult to start the motor, thereby reducing the probability of the power tool being accidentally started by the user due to accidental triggering of the switching components when the pusher component 20 is in the stored state. This reduces the user's risk and improves the safety of the power tool.

[0079] In one embodiment, such as Figure 3 As shown, the power tool also includes a power switch 11. The power switch 11 is used to switch the control circuit between an inactive and an active state in response to a user operation. When the control circuit is active, it allows current from the power supply 12 to flow to the motor 13. When the control circuit is inactive, it prevents current from flowing from the power supply 12 to the motor 13. The motor start switch 15 includes a first operating element 62, which outputs a motor start signal in response to a user operation. Under the first control logic and the second control logic, the trigger holding time of the power switch 11 is different; and / or under the first control logic and the second control logic, the allowed trigger time of the first operating element 62 is different.

[0080] Specifically, when the control circuit is in the active state, allowing current from power supply 12 to flow to motor 13 can be understood as the power supply circuit from power supply 12 to motor 13 being conductive, but only under certain conditions. In this embodiment, the power supply circuit from power supply 12 to motor 13 can be controlled by the main control unit 14. When the control circuit is in the active state, the main control unit 14 controls the power supply circuit from power supply 12 to motor 13 to conduct only when it receives a motor start signal, so that motor 13 drives the working part to work. When the control circuit is in the inactive state, the main control unit 14 is configured not to receive a motor start signal, and therefore cannot control the power supply circuit from power supply 12 to motor 13 to conduct. Alternatively, the main control unit 14 is configured not to control the power supply circuit from power supply 12 to motor 13 to conduct even if it receives a motor start signal.

[0081] In order to reduce the probability of false start of motor 13 when pusher component 20 is in non-working position area, in this embodiment, under the first control logic and the second control logic, the trigger holding time of power-on switch 11 is preset to be different, so that the control circuit is allowed to enter the active state for different times; or the allowed trigger time of first operating element 62 is preset to be different, so that the main control unit 14 is allowed to receive motor start signal for different times; or the trigger holding time of power-on switch 11 and the allowed trigger time of first operating element 62 are both set to be different.

[0082] The trigger hold time of the power-on switch 11 can be understood as the time from when the power-on switch 11 is triggered until the control circuit switches from the inactive state to the active state. For example, if the power-on switch 11 is a push-button switch, the user presses and holds the button until the preset trigger hold time is reached before the control circuit enters the active state. Or, if the power-on switch 11 is a rotary switch, the user rotates the power-on switch to a preset angle and holds it at that angle until the preset trigger hold time is reached before the control circuit enters the active state.

[0083] The permissible trigger time of the first operating element 62 can be understood as the preset time during which the main control unit 14 is allowed to receive the motor start signal after the control circuit enters the activated state. This preset time can be a preset time period or a fixed time point. For example, the first operating element 62 can be a trigger; the user can control the motor 13 to start by pulling the trigger within 10 seconds of the control circuit entering the activated state (i.e., within the preset time period). Alternatively, the user can control the motor 13 to start only after pulling the trigger at the 10th second after the control circuit enters the activated state (i.e., at a fixed time point at a preset interval).

[0084] This embodiment sets different trigger holding times for the control circuits under the first control logic and the second control logic in response to the power-on switch 11, and / or different allowable trigger times for the first operating element 62. This allows the user to easily trigger the power-on switch 11 and the first operating element 62 to start the motor 13 when the push rod is in the working position area. When the push rod is in the non-working position area, it increases the difficulty of triggering the power-on switch 11 and the motor start switch 15, reduces the probability of the motor 13 being powered on and started, and thus improves the safety of the power tool when the push handle component 20 is in the storage state.

[0085] There are multiple ways to implement the first and second control logics. The following examples illustrate these methods.

[0086] As a first example, such as Figure 3 and Figure 4As shown, the first control logic includes at least: when the trigger hold time of the power-on switch 11 reaches a first hold time, the control circuit is allowed to enter the active state. The second control logic includes at least: when the trigger hold time of the power-on switch 11 reaches a second hold time, the control circuit is allowed to enter the active state. The second hold time is greater than the first hold time.

[0087] Specifically, the control circuit includes a timing unit 16. The control circuit determines whether the trigger holding time of the power-on switch 11 meets the preset conditions (i.e., whether the first holding time or the second holding time has been reached) based on the timing time of the timing unit 16. When the trigger holding time meets the preset conditions, the control circuit is allowed to enter the active state.

[0088] In this embodiment, the timing unit 16 is used to start timing the instant the power switch 11 is triggered, and to send a timing signal to the main control unit 14 when the timing time reaches the preset first holding time or second holding time, so that the control circuit enters the activated state.

[0089] The timing unit can be located outside the main control unit 14 and connected to it, or it can be integrated into the main control unit 14. In one case, the timing unit 16 is located outside the main control unit 14, such as... Figure 3 As shown, the timing unit 16, along with the power-on switch 11 and the first operating element 62, is mounted on the switch control unit 111 of the control circuit. When the switch control unit 111 detects that the power-on switch 11 has been triggered, it controls the timing unit 16 to start timing and sends a timing signal to the main control unit 14 when the timing time reaches a preset first hold time or a second hold time. In another case, the timing unit 16 can also be integrated into the main control unit 14. The power-on switch 11 and the motor start switch 15 are mounted in the switch control unit 111. At the moment the power-on switch 11 is triggered, the switch control unit 111 controls the power supply circuit from the power supply 12 to the main control unit 14 to be turned on. The main control unit 14 is powered on and controls the timing unit 16 to start timing. When the timing time reaches a preset trigger hold time, the control circuit enters the active state.

[0090] Furthermore, to facilitate user notification that the control circuit has entered the active state, this embodiment also provides a display unit 17, which is connected to and controlled by the switch control unit 111. When the timing unit 16 reaches the preset first holding time or second holding time, the switch control unit 111 controls the display unit 17 to light up, indicating to the operator that the control circuit has entered the active state. The operator can then trigger the first operating element 62 after the display unit 17 lights up to start the motor. By setting up the display unit 17, not only can the operator be notified when the push handle 20 is in the working position area, but the operator can also be reminded that the overall control circuit has been activated when the push handle 20 is in the non-working position area. This prevents the operator from further operating the first operating element 62, which could lead to accidental motor start-up, and further improves the safety of the power tool.

[0091] In this example, the second holding time is greater than or equal to three times the first holding time. Preferably, the second holding time is greater than or equal to five times the first holding time. For example, the second holding time can be three, five, 20, 50, or 100 times the first holding time. The longer the second holding time, the longer the power-on switch 11 needs to be continuously triggered, and the lower the probability of accidental triggering by the user.

[0092] Specifically, the second holding time is greater than or equal to 2 seconds, and the first holding time is less than or equal to 0.6 seconds. For example, the first holding time can be 0 seconds, 0.1 seconds, 0.3 seconds, 0.5 seconds, or 0.6 seconds, and the second holding time can be 2 seconds, 5 seconds, 10 seconds, 15 seconds, 20 seconds, or 30 seconds, etc. For example, from the user's perspective, when the push handle 20 is in the working position area, the user only needs to trigger the power switch for 0.3 seconds to activate the control circuit. Then, the user can trigger the first operating element 62 to control the motor 13 to start working, thus conveniently starting the power tool. However, when the push handle 20 rotates to the non-working position area, the user needs to continuously press or rotate the power switch for 30 seconds to activate the control circuit, and then trigger the first operating element 62 to control the motor 13 to start working. For users, turning on the switch usually only requires a brief press. Therefore, users are unlikely to think that they need to press and hold the power switch for 30 seconds to activate the control circuit. Furthermore, even if a user accidentally triggers the power switch, they will not continuously press it for an extended period. When the push handle component 20 is in the non-operating position, a user's habitual brief triggering of the power switch 11 will not activate the control circuit. Therefore, the solution provided in this embodiment can reduce the probability of the motor starting due to accidental triggering of the power switch, and improve the safety of using the push handle component 20 when it is folded.

[0093] The above embodiments configure the power-on switch 11 to have different trigger holding times under the first control logic and the second control logic, so that the probability of motor erroneous start is lower under the second control logic.

[0094] As a second example, the first control logic includes at least: when the control circuit enters an active state, the allowable trigger time of the first operating element 62 is configured within a first preset time. The second control logic includes at least: when the control circuit enters an active state, the allowable trigger time of the first operating element 62 is configured within a second preset time.

[0095] Alternatively, the second control logic includes: the allowable trigger time of the first operating element 62 is configured to be a fixed time point at a preset interval from the time the control circuit enters the active state, and the control circuit allows the motor to receive a motor start signal at the fixed time point to control the current of the power supply 12 to flow to the motor 13, so that the motor 13 drives the working part 31 to work.

[0096] Specifically, when the pusher component 20 is in the working position area, the operator first triggers the power switch 11 to activate the control circuit. From the moment the control circuit is activated, the timing unit 16 starts timing, and simultaneously, the main control unit 14 allows the response to the motor start signal. When the timing unit 16 reaches the first preset time, the timing unit 16 sends a signal to the main control unit 14. Upon receiving the timing signal, the main control unit 14 no longer responds to the motor start signal.

[0097] When the pusher component 20 is in the non-working position, the operator first triggers the power switch 11 to activate the control circuit. From the moment the control circuit is activated, the timing unit 16 starts timing, and simultaneously, the main control unit 14 allows the response to the motor start signal. When the timing unit 16 reaches the second preset time, it sends a signal to the main control unit 14. Upon receiving the timing signal, the main control unit 14 no longer responds to the motor start signal.

[0098] Alternatively, when the pusher component 20 is in the non-working position, the operator first triggers the power switch 11 to activate the control circuit. From the moment the control circuit is activated, the timing unit 16 starts timing. When the timing reaches a preset fixed time point, the timing unit 16 sends a signal to the main control unit 14. The main control unit 14 is allowed to respond to the motor start signal at that fixed time point. If the timing does not reach that time point or exceeds it, the main control unit 14 will not respond to the motor start signal; that is, the main control unit 14 cannot receive the motor start signal, or even if it receives the motor start signal, it will not control the motor 13 to start.

[0099] In this example, the second preset time is less than the first preset time. For example, the second preset time is less than or equal to one-fifth, one-tenth, or one-hundredth of the first preset time. For instance, the second preset time could be one-fifth or one-tenth of the first preset time.

[0100] Specifically, the first preset time is greater than or equal to 30 seconds, for example, the first preset time can be 30 seconds, 40 seconds, 50 seconds, or 60 seconds, etc. The second preset time is greater than or equal to 0 seconds and less than or equal to 5 seconds, for example, the second preset time can be 0 seconds, 0.2 seconds, 0.3 seconds, 0.5 seconds, 1 second, 2 seconds, 3 seconds, 4 seconds, or 5 seconds, etc. If the second preset time is greater than 5 seconds, it will increase the probability of the user accidentally triggering the motor drive switch.

[0101] The preset fixed time points can be 0.5s, 1s, 5s, 10s, etc., after the self-control circuit enters the activation state.

[0102] In other words, from the user's perspective, when the pusher component 20 is in the working position zone, after the user triggers the power switch 11 to activate the control circuit, the first operating element 62 can be triggered within 60 seconds to power on and start the motor 13. However, when the pusher component 20 is in the non-working position zone, after the user triggers the power switch 11 to activate the control circuit, the first operating element 62 must be triggered within 0.3 seconds, or within 3 seconds of the control circuit activating, for the motor 13 to start. Therefore, when the pusher component 20 is in the working position zone, the user has sufficient time to trigger the first operating element 62, ensuring that the motor can be started whenever the user wants. When the pusher component 20 is in the non-working position area, the user needs to trigger the power switch 11 and the first operating element 62 almost simultaneously to start the motor. Alternatively, after triggering the power switch 11, a timer needs to be set, and the first operating element 62 needs to be triggered after the timer reaches a fixed point to start the motor. Usually, the user triggers the power switch 11 and the first operating element 62 sequentially at the normal speed to start the motor. Therefore, the user is unlikely to think that the power switch 11 and the first operating element 62 need to be triggered simultaneously to start the motor, thus greatly reducing the probability of the motor starting by mistake.

[0103] This example increases the difficulty of starting the motor 13 by changing the allowable trigger time of the first operating element 62 when the push rod is in the non-working position area. This reduces the probability of the user accidentally starting the motor 13 during the folding process of the pusher component 20, thereby improving safety performance.

[0104] As a third example, the first control logic includes at least: the trigger holding time of the power-on switch 11 reaches a first holding time, allowing the control circuit to enter an active state; and in the active state, the control circuit is allowed to receive a motor start signal within a first preset time. The second control logic includes at least: the trigger holding time of the power-on switch 11 reaches a second holding time, allowing the control circuit to enter an active state; and in the active state, the control circuit is allowed to receive a motor start signal within a second preset time. Wherein, the second holding time is greater than the first holding time, and the second preset time is less than the first preset time. Alternatively, the second start logic includes: the trigger holding time of the power-on switch 11 reaches the second holding time, allowing the control circuit to enter an active state; and from the moment the control circuit enters the active state, at fixed time points at preset intervals, the control circuit is allowed to receive a motor start signal.

[0105] Specifically, when the pusher component 20 is in the working position area, the operator first triggers the power switch 11. The switch control unit 111 detects the moment the power switch 11 is triggered and controls the timing unit 16 to start timing. When the timing time reaches the preset first holding time, the switch control unit 111 sends a timing signal to the main control unit 14. At this time, the control circuit enters the active state, and the main control unit 14 allows the response to the motor start signal. From the time the timing time reaches the preset first holding time, the switch control unit 111 again controls the timing unit 16 to start timing. When the timing time of the timing unit 16 reaches the first preset time, the timing unit 16 sends a signal to the main control unit 14. After receiving the timing signal, the main control unit 14 no longer responds to the motor start signal.

[0106] When the pusher component 20 is in the non-working position, the operator first triggers the power switch 11. The switch control unit 111 detects the triggering of the power switch 11 and controls the timing unit 16 to start timing. When the timing reaches a preset second holding time, the switch control unit 111 sends a timing signal to the main control unit 14. At this time, the control circuit enters the active state, and the main control unit 14 allows the response to the motor start signal. From the time the timing reaches the preset second holding time, the switch control unit 111 again controls the timing unit 16 to start timing. When the timing unit 16's timing reaches the second preset time, the timing unit 16 sends a signal to the main control unit 14. After receiving the timing signal, the main control unit 14 no longer responds to the motor start signal. Alternatively, from the time the timing reaches the preset second holding time, the switch control unit 111 again controls the timing unit 16 to start timing. When the timing reaches a preset fixed time point, the timing unit 16 sends a signal to the main control unit 14, and the main control unit 14 allows the response to the motor start signal at that fixed time point.

[0107] Preferably, the second holding time is greater than or equal to three times the first holding time; the second preset time is less than the first preset time. Specifically, the second holding time is greater than or equal to 2 seconds, and the first holding time is less than or equal to 0.6 seconds. The second preset time is greater than or equal to 0 seconds and less than or equal to 5 seconds, and the first preset time is greater than or equal to 30 seconds. For example, the first holding time can be 0 seconds, 0.1 seconds, 0.3 seconds, 0.5 seconds, or 0.6 seconds, etc. The second holding time can be 2 seconds, 5 seconds, 10 seconds, 15 seconds, 20 seconds, or 30 seconds, etc. The first preset time can be 30 seconds, 40 seconds, 50 seconds, or 60 seconds, etc. The second preset time can be 0 seconds, 0.2 seconds, 0.3 seconds, 0.5 seconds, 1 second, 2 seconds, 3 seconds, 4 seconds, or 5 seconds, etc.

[0108] Preferably, the preset fixed time point can be 0.5s, 1s, 5s, 10s, 20s, etc., starting from the second holding time.

[0109] In other words, from the user's perspective, when the pusher component 20 is in the working position area, the user only needs to trigger the power switch for 0.3 seconds, and then trigger the motor start switch within 60 seconds to start the motor. However, when the pusher component 20 is in the working position area, the user needs to continuously press or rotate the power switch for 30 seconds to activate the control circuit, and then trigger the first operating element 62 within 0.3 seconds of the control circuit activation, or trigger the first operating element 62 3 seconds after the control circuit enters the activated state, to start the motor 13. For the user, continuously triggering the power switch 11 and holding it for a period of time is a low-probability event, and the probability of triggering the first operating element 62 again within a very short time after continuously triggering the power switch 11 to reach the preset trigger holding time is even lower. Therefore, this example can effectively reduce the probability of the user accidentally triggering the power switch 11 and the first operating element 62, causing the motor 13 to start, and improve the operational safety when folding the pusher component 20.

[0110] Compared to the solutions provided in the first and second examples, this example can further increase the difficulty of starting the motor 13 by changing both the trigger holding time of the power switch 11 and the allowable trigger time of the first operating element 62 when the push rod is in the non-working position area, thereby reducing the probability of the user accidentally starting the motor 13 during the folding process of the push handle component 20 and improving safety performance.

[0111] In one embodiment, the power tool 100 includes a push lawnmower, the motor of which includes a cutting motor, and the working part includes a cutting part. The cutting motor drives the cutting part to move to perform cutting work. Figure 4As shown, for the cutting motor, the first operating element 62 can be a cutting lever 621, which is parallel to the push rod 21 of the pusher component 20 and is used by the user to pull it. When the user needs to control the start of the cutting motor, they can first trigger the power switch 11 set on the switch control unit 111 and continue to trigger it until the preset trigger holding time is reached, so that the control circuit enters the active state. When the control circuit enters the active state, the display unit 17 lights up, thereby prompting the user to operate the cutting lever. When the cutting lever is pulled close to the push rod 21 within the allowed trigger time, the cutting motor starts to drive the cutting part to work.

[0112] Alternatively, the motor 13 of the power tool may include a self-driven motor, and the working part 31 may include a moving assembly for driving the main unit 10 to move within a set path or working area. Figure 4 As shown, for the self-driven motor, the first operating element 62 can be a self-driven lever 622, which is located at the push rod 21 and parallel to both the push rod 21 and the cutting lever 621. The self-driven lever 622 and the cutting lever 621 can be located on opposite sides of the push rod 21 for user operation. When the user needs to control the self-driven motor to start, they can first trigger the power switch 11 on the switch control unit 111 and continue triggering it for a preset trigger holding time to activate the control circuit. When the control circuit is activated, the display unit 17 lights up, prompting the user to operate the self-driven lever 622. When the self-driven lever is moved close to the push rod 21 within the allowed trigger time, the self-driven motor starts to drive the moving component.

[0113] The limitations on the trigger holding time of the power-on switch 11 and the allowable trigger time of the first operating element 62 by the first, second, and third examples described above can all be applied to the cutting motor or self-driven motor provided in this embodiment. Specific implementation methods are as described in the foregoing embodiments and will not be repeated here.

[0114] In the aforementioned embodiments, when it is necessary to start the cutting motor or the self-driven motor, the user performs two switch triggering actions (triggering the power-on switch + triggering the first operating element) to start the motor. When the power tool is a push lawnmower, specifically, when the lawnmower is used in commercial scenarios, such as when a landscaping team carries the lawnmower to mow multiple gardens, the lawnmower needs to be loaded and transported with the landscaping team from one garden to another. Therefore, there are many transportation scenarios, and the push handle component 20 also has many storage scenarios. As a result, the probability of the motor starting by mistake is relatively high. The dual-trigger motor starting action is difficult to meet the safety requirements for motor starting in commercial scenarios.

[0115] Based on this, in yet another embodiment, such as Figure 4As shown, the motor start switch 15 also includes an unlocking element 61. The unlocking element 61 is used to control the first operating element 62 to switch between a locked state and an unlocked state. When the first operating element 62 is in the locked state, the first operating element 62 cannot respond to user operation and output a motor start signal. When the first operating element 62 is in the unlocked state, the first operating element 62 can respond to user operation and output a first operating motor start signal.

[0116] Specifically, in one example, the unlocking element 61 is configured as a mechanical actuation element. The mechanical actuation element includes a stop operably coupled to the first actuation element 62. When the unlocking element 61 is not operated, the stop abuts against the first actuation element 62, preventing the first actuation element 62 from being operated to move toward the push rod 21, thus preventing the output of a motor start signal; at this time, the first actuation element 62 is in a locked state. When the unlocking element 61 is operated, the stop releases the first actuation element 62, allowing the first actuation element 62 to be operated to move toward the push rod 21; at this time, the first actuation element 62 is in an unlocked state, and when the first actuation element 62 approaches the push rod 21, the first actuation element 62 can output a motor start signal. Therefore, in this example, when the motor needs to be started, the user needs to perform three triggering actions: first, trigger the power switch 11 to activate the control circuit; then, within the allowed triggering time, trigger the unlocking element 61 and the first actuation element 62 respectively to start the motor.

[0117] The limitations on the trigger holding time of the power-on switch 11 and the allowable trigger time of the first operating element 62 in the first, second, and third examples described above can all be applied to this embodiment. That is, under the first control logic, after the control circuit enters the activated state, the user needs to operate the unlocking element 61 and the first operating element 62 within a first preset time to control the motor to start. Under the second control logic, after the control circuit enters the activated state, the user needs to operate the unlocking element 61 and the first operating element 62 within a second preset time to control the motor to start. Since the second preset time is less than the first preset time, and the second preset time is less than or equal to 5 seconds, it is difficult for the user to operate both elements in a short time under the second control logic, thus increasing the difficulty of starting the power tool under the second control logic.

[0118] In another example, the unlocking element 61 is configured as an electronic switch that outputs an unlocking signal in response to user operation. The control circuit is only allowed to receive the motor start signal after receiving the unlocking signal. That is, in this example, when it is necessary to control the motor to start, the user must first trigger the power switch 11 to activate the control circuit. Then, the user triggers the unlocking element 61, and after the control circuit receives the unlocking signal, the user can then trigger the first operating element 62 to control the motor to start.

[0119] The limitations on the trigger holding time of the power-on switch 11 and the allowable trigger time of the first operating element 62 in the first, second, and third examples described above can all be applied to this embodiment. For details, please refer to the description of the unlocking element 61 as a mechanical operating component in the previous embodiment; it will not be repeated here.

[0120] In the case where the unlocking element 61 is an electronic switch, the continuous triggering time of the unlocking element 61 can be differentiated and limited under the first control logic and the second control logic, so as to further increase the difficulty of starting the motor under the second control logic.

[0121] As a fourth example, the first control logic includes at least the following: when the control circuit enters the active state, from the moment the unlocking element 61 is triggered until the continuous triggering time for outputting an unlocking signal to the control circuit reaches the third holding time, the control circuit allows the reception of a motor start signal to control the current flow of the power supply to the motor according to the motor start signal, so as to make the motor drive working part work. That is, when the timing time has not reached the third holding time, the control circuit does not respond to the motor start signal, that is, it cannot receive the motor start signal, or even if it receives the motor start signal, it does not control the motor to start.

[0122] The second control logic includes at least the following: when the control circuit enters the active state, the unlocking element 61, from the moment it is triggered until the continuous triggering time for outputting an unlocking signal to the control circuit reaches the fourth holding time, allows the control circuit to receive a motor start signal, and controls the current flow of the power supply to the motor according to the motor start signal, so that the motor drives the working part to work. The fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times the third holding time.

[0123] Specifically, such as Figure 4 As shown, the unlocking element 61 can be disposed on the switch control unit 111. The unlocking element 61 can be a push-button switch. When the push-button switch is pressed, it can output an unlocking signal to the main control unit 14. When the main control unit 14 receives the unlocking signal, it is allowed to respond to the motor start signal to control the motor to start. When the main control unit 14 does not receive the unlocking signal, it is prohibited from responding to the motor start signal. At this time, even if the user operates the first operating element 62, the motor cannot be started.

[0124] When the pusher component 20 is in the working position area, the user must first trigger the power switch 11 to activate the control circuit. Then, the user triggers the unlocking element 61 and presses it continuously. The switch control unit 111 detects the triggering of the unlocking element 61 and controls the timing unit 16 to start timing. The timing continues while the unlocking element 61 remains in the triggered state until the timing reaches the preset third holding time. At this time, the switch control unit 111 sends an unlocking signal to the main control unit 14, allowing the main control unit 14 to receive the motor start signal. When the main control unit 14 receives the motor start signal, it controls the motor to start.

[0125] When the pusher component 20 is in the non-working position, to start the motor, the power switch 11 must first be triggered to activate the control circuit. Then, the unlocking element 61 is triggered, and by continuously pressing it, the switch control unit 111 detects the triggering of the unlocking element 61 and controls the timing unit 16 to start timing. The timing continues while the unlocking element 61 remains in the triggered state until the preset fourth holding time is reached. At this point, the switch control unit 111 sends an unlock signal to the main control unit 14, allowing the main control unit 14 to receive the motor start signal. When the main control unit 14 receives the motor start signal, it can control the motor to start.

[0126] Preferably, the fourth holding time is greater than or equal to three times the third holding time. For example, the fourth holding time can be 3, 5, 20, 50, or 100 times the third holding time. The longer the fourth holding time, the longer the unlocking element 61 needs to be continuously triggered, and the lower the probability of accidental triggering by the user.

[0127] Specifically, the fourth holding time is greater than or equal to 2 seconds, and the third holding time is less than or equal to 0.6 seconds. For example, the third holding time can be 0 seconds, 0.1 seconds, 0.3 seconds, 0.5 seconds, or 0.6 seconds, etc., and the fourth holding time can be 2 seconds, 5 seconds, 10 seconds, 15 seconds, 20 seconds, or 30 seconds, etc. Since the fourth holding time is much longer than the third holding time, when the pusher component 20 is in the non-working position area, the user needs to continuously trigger the unlocking element 61 for a period of time. For the user, usually pressing three switches briefly is enough to start the motor, so the user will not think that after pressing the power switch 11, they need to continuously press the unlocking element 61. Even if the user accidentally touches the switch, it will not be a long-term accidental touch. Therefore, the solution provided in this embodiment can reduce the probability of the motor starting due to the user accidentally triggering the power switch and the motor start switch, and improve the safety of the pusher component 20 when folded.

[0128] Alternatively, as a fifth example, when the pusher component 20 is in the non-working position area, the trigger holding time of the unlocking element 61 can be not limited, but the allowed trigger time of the unlocking element 61 can be limited to increase the difficulty of starting the motor. In this embodiment, the first control logic can be the same as the aforementioned fourth example, and the second control logic includes at least: a preset fixed time interval between the control circuit entering the active state and the control circuit receiving the unlocking signal. That is, the timing starting point for the control circuit to receive the unlocking signal is from the time the control circuit enters the active state. When the timing reaches the preset fixed time point, the control circuit allows the receiving of the unlocking signal at that fixed time point, and after receiving the unlocking signal, it allows the receiving of the motor start signal.

[0129] For example, the preset fixed time points can be 5s, 10s, 15s, or 20s, etc. The preset fixed time points are the intervals from when the control circuit enters the active state. That is, the control circuit is allowed to receive the unlock signal at the 5s, 10s, 15s, or 20s after entering the active state. If the timeout period is less than or exceeds the preset interval, the control circuit will not respond to the unlock signal, that is, it will not be able to receive the unlock signal, or even if it receives the unlock signal, it will not take any action.

[0130] This embodiment does not limit the allowed triggering time of the unlocking element 61 and the first operating element 62 under the first control logic. The user only needs to trigger the unlocking element 61 and the first operating element 62 in sequence after triggering the main power switch 11 to control the motor to start. Under the second control logic, by limiting the reception of the unlocking signal to a fixed time, the difficulty of starting the motor can be increased, thereby improving the safety of the power tool when the push handle component 20 is in the stored state.

[0131] Furthermore, as a sixth example, based on the fourth or fifth example, under the first control logic and the second control logic, not only can the trigger holding time or allowed trigger time of the unlocking element 61 be limited, but the allowed trigger time of the first operating element 62 can also be further limited, so as to further increase the difficulty of starting the motor under the second control logic.

[0132] Specifically, the first control logic further includes: the control circuit is allowed to receive a motor start signal within a first preset time period. The timing start point of the first preset time is when the continuous triggering time of the unlocking element 61 reaches the third holding time.

[0133] The second control logic also includes: the control circuit is allowed to receive the motor start signal within a second preset time, wherein the timing start of the second preset time is from the time the continuous triggering time of the unlocking element 61 reaches the fourth holding time, and the second preset time is less than the first preset time.

[0134] Alternatively, the second control logic includes: the control circuit allows receiving a motor start signal at fixed time points at preset intervals after receiving the unlock signal.

[0135] For example, the second preset time is less than or equal to one-fifth, one-tenth, or one-hundredth of the first preset time. For instance, the second preset time can be one-fifth or one-tenth of the first preset time.

[0136] Specifically, the first preset time is greater than or equal to 30 seconds, and the second preset time is greater than or equal to 0 seconds and less than or equal to 5 seconds. For example, the first preset time can be 30 seconds, 40 seconds, 50 seconds, or 60 seconds, etc. The second preset time can be 0 seconds, 0.1 seconds, 0.2 seconds, 0.3 seconds, 0.4 seconds, or 0.5 seconds. If the second preset time is greater than 5 seconds, it will increase the probability of the user accidentally triggering the first operating element. The preset fixed time points can be 0.5 seconds, 5 seconds, 10 seconds, 15 seconds, 20 seconds, etc., starting from the fourth hold time.

[0137] This embodiment, under the second control logic, not only extends the trigger holding time of the unlocking element 61, but also shortens the allowable trigger time of the first operating element 62. That is, when the pusher component 20 is in the non-working position area, the user needs to first trigger the main power switch 11, then continuously trigger the unlocking element 61 and hold it for a certain period of time. Only when the continuous triggering time is reached or at a fixed time point after the continuous triggering time is reached can the first operating element 62 be triggered to control the motor to start. Compared with the previous embodiment, the motor starting logic provided in this embodiment makes the probability of motor erroneous start lower, which can further improve the safety of power tools.

[0138] Furthermore, in this embodiment, the trigger holding time of the power-on switch 11 can be set differently under the first control logic and the second control logic to further increase the probability of motor erroneous start under the second control logic. That is, a combination of the sixth example and the first example.

[0139] In the first control logic, when the trigger holding time of the power-on switch 11 reaches the first holding time, the control circuit allows the reception of the unlock signal. Upon receiving the unlock signal, the control circuit determines whether the time for which the unlocking element 61 holds the trigger state has reached the third holding time. If the third holding time has been reached, the control circuit allows the reception of the motor start signal within the first preset time, and controls the motor to start upon receiving the motor start signal. The first holding time, the third holding time, and the first preset time are the same as in the aforementioned embodiment and will not be repeated here.

[0140] Under the second control logic, when the trigger holding time of the power-on switch 11 reaches the second holding time, the control circuit allows receiving the unlock signal. Upon receiving the unlock signal, the control circuit determines whether the time for which the unlocking element 61 holds the trigger state has reached the fourth holding time. If the fourth holding time is reached, the control circuit allows receiving the motor start signal at fixed time points at preset intervals starting from the fourth holding time, and controls the motor to start upon receiving the motor start signal. The second holding time is greater than the first holding time, the fourth holding time is greater than the third holding time, and the second preset time is less than the first preset time. The second holding time, the fourth holding time, and the second preset time are the same as in the previous embodiment and will not be repeated here.

[0141] In this embodiment, by limiting the trigger holding time of the power-on switch 11, the continuous trigger time of the unlocking element 61, and the allowable trigger time of the first operating element 62 under the first and second control logics to be different, the probability of the motor starting due to user accidental operation of the switch components when the pusher component 20 is in the non-working position area is greatly reduced. Generally speaking, the user can start the motor by briefly pressing three switches, so the user will not think that it is necessary to trigger the power-on switch 11 and the unlocking element 61 for a long time. Moreover, the probability of consecutively triggering three switches is already a low-probability event. The probability of holding the trigger state for a certain period of time during the first trigger action (power-on switch 11) and the second trigger action (unlocking element 61) is even smaller. Furthermore, the probability of triggering the first operating element in a short period of time or at a fixed time point after the second trigger action ends is even smaller. It is almost impossible to achieve this unconsciously. Therefore, the solution provided in this embodiment can increase the difficulty of accidental triggering of the switch components when the pusher component 20 is in the stored state, effectively reducing the probability of motor accidental start.

[0142] The power tools provided in the above embodiments all include a power switch 11. The power switch 11 is used to activate the control circuit when it is triggered. When the control circuit is activated, the control circuit is allowed to receive a motor start signal.

[0143] In another embodiment, the power tool may not have a power switch 11, and the control circuit may be activated when the power tool is connected to the power supply 12.

[0144] Specifically, when the battery pack is installed in the power supply mounting section, the control circuit enters the activation state in response to the battery pack's connection. At this time, the power supply circuit from the power supply 12 to the main control unit 14 is connected, the main control unit 14 is powered on, and it is allowed to receive the motor start signal. To improve the safety of the power tool and reduce the probability of accidental motor start, the motor start switch includes an unlocking element 61 and a first operating element 62. The unlocking element 61 is used to output an unlocking signal in response to user operation, and the first operating element 62 is used to output a motor start signal in response to user operation. When the main control unit 14 receives the unlocking signal and the motor start signal, it controls the motor to start.

[0145] When the power tool does not have a power switch 11, the following control logic can be used to increase the difficulty of starting the motor when the pusher component 20 is in the non-working position area.

[0146] As a seventh example, the first control logic includes: when the control circuit enters the active state, the unlocking element 61 is triggered from the start until the continuous triggering time for outputting an unlocking signal to the control circuit reaches the third holding time, the control circuit allows receiving a motor start signal, and controls the current of the power supply to flow to the motor according to the received motor start signal, so as to make the motor drive working part work.

[0147] The second control logic includes: when the control circuit enters the active state, the unlocking element 61, from the moment it is triggered until the continuous triggering time until it outputs an unlocking signal to the control circuit reaches the fourth holding time, allows the control circuit to receive a motor start signal and controls the current flow of the power supply to the motor according to the received motor start signal, so that the motor drives the working part to work. The fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times the third holding time. Specific limitations on the third and fourth holding times can be found in the previous embodiment, and will not be repeated in this embodiment.

[0148] Of course, the allowable trigger time of the first operating element 62 can be further limited to further increase the difficulty of starting the motor under the second control logic.

[0149] As an eighth example, based on the seventh example, the first control logic further includes: the control circuit is allowed to receive a motor start signal within a first preset time period. The timing start point of the first preset time period is when the trigger holding time of the unlocking element 61 reaches the third holding time.

[0150] The second control logic also includes: the control circuit is allowed to receive a motor start signal within a second preset time. The timing start point of the second preset time is when the trigger holding time of the unlocking element 61 reaches the fourth holding time, and the second preset time is less than the first preset time.

[0151] Alternatively, the second control logic includes: the control circuit allows receiving a motor start signal at fixed time points at preset intervals starting from the fourth holding time.

[0152] For specific limitations regarding the first and second control logics, please refer to the foregoing embodiments, which will not be repeated here.

[0153] In the above embodiments, the power tool is a push lawnmower, which may include both a cutting motor and a self-driving motor. The first control logic and the second control logic provided in the above embodiments can be used to control the start of the cutting motor or the start of the self-driving motor.

[0154] In one embodiment, both the power-on switch 11 and the unlocking element 61 can be push-button switches. A push-button switch can be either a normally open switch or a normally closed switch. For a normally open switch, the switch closes when triggered and opens when released; or for a normally closed switch, the switch opens when triggered and closes when released. Therefore, the control circuit will respond to the switch's triggering action by generating a level transition. When the switch is continuously triggered, the level remains unchanged; when the switch is released, the level transition occurs again. The main control unit 14 can then start timing at the beginning of the level transition and maintain timing while the level remains unchanged, thereby determining whether the switch has maintained its triggered state for a preset holding time.

[0155] The motor starting control scheme provided in the above embodiment employs a second control logic when the pusher component 20 is in the non-working position area. Although it is very difficult for the user to start the motor by operating the switch component under the second control logic, there is still a certain probability of starting. If the motor is accidentally started, there is still a safety risk.

[0156] Based on this, in one embodiment, when the control circuit receives a first state signal, it allows the motor to start operating at least at a first speed; when the control circuit receives a second state signal, it allows the motor to start operating at at least a second speed, where the second speed is less than or equal to one-third of the first speed. Specifically, the first speed here should be understood as the motor speed under normal operating conditions of the power tool.

[0157] Preferably, the second rotational speed is less than or equal to one-fifth of the first rotational speed. For example, the second rotational speed may be one-third, one-quarter, one-fifth, or one-tenth of the first rotational speed.

[0158] Specifically, the first rotational speed can be above 2500 r / min, such as 2500 r / min, 3000 r / min, 3500 r / min, or 4000 r / min, and the second rotational speed can be below 700 r / min, such as 700 r / min, 600 r / min, 300 r / min, or 200 r / min. Because the second rotational speed is much lower than the first rotational speed, even if the motor drives the working parts (such as blades and moving components) to work, it will not cause much harm to the user.

[0159] In one embodiment, when the control circuit receives the second status signal, the control circuit is also configured to control the motor 13 to shut down after a preset time since the motor 13 was started. Thus, even if the user accidentally starts the motor 13 during the folding process, the control circuit can control the motor 13 to shut down after the preset time since the start, preventing harm to the user.

[0160] In this embodiment, the preset time is less than or equal to 5 seconds. Specifically, the preset time can be 2 seconds, 4 seconds, or 5 seconds. If the preset time exceeds 5 seconds, the motor will rotate too many times, which may pose a safety hazard.

[0161] The following describes the linkage structure between the adjustment component 50 and the pusher component 20 provided in this application.

[0162] As mentioned above, the power tool provided in this application has an adjustment component 50, which includes a connecting part 51 and an adjusting part 52. The connecting part 51 and the adjusting part 52 cooperate to adjust the position between the pusher component 20 and the main unit 10. There are various ways to implement the adjustment component, and two embodiments are described below as examples.

[0163] As an example, please refer to Figure 5 and Figure 6 The adjustment component 50 includes a connector 51 and an adjustment component 52. The connector 51 is connected to the main unit 10, and the adjustment component 52 is connected to the pusher component 20. When the connector 51 and the adjustment component 52 cooperate, the pusher component 20 can be locked to the main unit 10. When the connector 51 and the adjustment component 52 are disengaged, the pusher component 20 can rotate around the main unit 10.

[0164] Specifically, in combination Figure 7 and Figure 8 The mating member 51 has a first position 511, and the adjusting member 52 has a mating part 521. When the mating part 521 is engaged with the first position 511, the pusher member 20 is in the working position area. When the mating part 521 is disengaged from the first position, the pusher member 20 is in the non-working position area.

[0165] The adjusting component 50 also includes an operating component 53 that drives the adjusting member 52 to engage with or disengage from the mating member 51. The operating component 53 can move along the axis 514 of the mating member 51 to the unlocking region 516. When the adjusting member 52 engages with the mating member 51, the pusher component 20 is locked in the first position 511 and cannot be adjusted. When the operating component 53 moves along the axis 514 to the unlocking region 516, the adjusting member 52 disengages from the mating member 51. At this time, the adjusting member 52 is movable relative to the mating member 51, and the pusher component 20 can perform corresponding adjustments, such as rotational adjustments. The unlocking region 516 refers to a planar region with a certain distance from the surface of the mating member 51 along the axis 514; it can also be understood as a planar region approximately parallel to the surface of the mating member 51. Since the unlocking area 516 is a planar area, the adjusting member 52 can move from the first position 511 along the axis 514 to the unlocking area 516; it can also move from other positions of the mating member 51 along the axis 514 to the unlocking area 516. Furthermore, the distance between the unlocking area 516 and the surface of the mating member 51 can be determined according to the performance of the signal unit 40, for example, the distance between the unlocking area 516 and the mating member 51 along the axis 514 can be 4mm. When the user needs to rotate the pusher member 20 from the working position area (first position) to the non-working position area, the operating component 53 must first be activated to move the pusher member 20 from the first position 511 to the unlocking area 516, and then the pusher member 20 must be rotated to the non-working position area.

[0166] Specifically, see Figure 5-8 There are two ways to implement the mating part 521 engaging with the first position 511: 1. The mating part 521 is directly engaged with the first position 511, meaning the first position 511 has a structure for connecting with the mating part 521; 2. When the mating part 521 is in the first position 511, other positions on the adjusting member 52 engage with other positions on the base 54. For example, the first position 511 can be designed as a blank area or a groove structure, with several teeth set around the periphery of the blank area or groove structure; simultaneously, corresponding teeth are set around the periphery of the mating part 521 for meshing, etc. Regardless of whether it is the first or the second method, it is acceptable as long as the pusher component 20 cannot be adjusted after the adjusting member 52 and the mating member 51 are engaged.

[0167] When the mating part 521 and the first position 511 are connected in the second way, taking the arrangement of several teeth around the first position 511 as an example, the distribution of the teeth and the first position 511 on the mating part 51 can be varied. For example, the teeth and the first position 511 are distributed around the outer periphery of the axis 514; or several teeth are arranged at intervals around the axis 514 to form a ring structure, and the first position 511 is located within the ring structure, etc.

[0168] Please refer to Figure 7 andFigure 8 , Figure 7 The structure of the mating part 51, Figure 8 To ensure the stability of the adjusting member 52's movement along the axis 514 after disengagement, the mating member 51 is provided with a guide shaft 518 having the axis 514. The adjusting member 52 is provided with a bushing 523 that is slidably sleeved outside the guide shaft 518.

[0169] In some embodiments, please refer to Figure 7 and Figure 8 The first position 511 includes at least two gear zones 51a. All gear zones 51a are distributed around axis 514. When the mating part 521 is engaged in either gear zone 51a, the pusher component 20 is in the working position area, and the signal unit 40 feeds back a first status signal to the main control unit 14. It should be noted that the adjustment between gear zones 51a can be as follows: First, the operating component 53 is used to disengage the mating part 521 from one of the gear zones 51a and move it along axis 514 to the unlocking area 516, at which time the adjusting member 52 is in an active state; the adjusting member 52 is rotated so that the mating part 521 is aligned with the other gear zone 51a; then, the operating component 53 is used to drive the mating part 521 to engage in that gear zone 51a to complete the adjustment between the gear zones 51a.

[0170] In some embodiments, please refer to Figure 7 and Figure 8 The mating part 51 also has a second position 512 that is spaced apart from the first position 511 around the axis 514. When the mating part 521 is mated on the second position 512, the pusher part 20 is located in the non-working position area, at which time the pusher part 20 is in a fully retracted state.

[0171] Further, please refer to Figure 7 and Figure 8 The mating member 51 is provided with an abutting part 513. The abutting part 513 is located between the first position 511 and the second position 512. When the mating part 521 abuts against the abutting part 513 along the axis 514, the adjusting member 52 and the mating member 51 are disengaged.

[0172] It should be noted that when the contacting part 513 contacts the mating part 521, it can prevent the adjusting member 52 from mating with the mating member 51. There are several ways to achieve this, such as: designing the contacting part 513 to be higher than the first position 511 in the direction of the axis 514, so that when the mating part 521 contacts the contacting part 513, other parts of the adjusting member 52 cannot contact the base 54; or, designing the contacting part 513 as a toothed structure and the mating part 521 as a protruding structure without teeth.

[0173] In some embodiments, please refer toFigure 2 , Figure 7 and Figure 8 The mating part 51 also has a third position 517 spaced apart from the first position 511 around the axis 514. When the mating part 521 is mated on the third position 517, the pusher part 20 is in a non-working position area, at which time the pusher part 20 is in a middle retracted state and is approximately perpendicular to the plane of the power tool 100. Thus, when the pusher part 20 is approximately perpendicular to the plane of the power tool 100, that is, when the pusher part 20 is basically in a vertical state, the control unit receives a second state signal and activates the second control logic.

[0174] It should be noted that when the power tool 100 is transported to another location, if the pusher component 20 is in a fully retracted state, for example, folded onto the main unit 10 and roughly parallel to the plane where the power tool 100 is located, the overall length of the power tool 100 will increase, occupying transport space. However, if the pusher component 20 is in a partially retracted state, roughly perpendicular to the plane where the power tool 100 is located, for example, at an angle of 70° to 110° between the pusher component 20 and the plane where the power tool 100 is located, the overall length of the power tool 100 can be reduced, facilitating relocation and improving relocation efficiency.

[0175] In some embodiments, please refer to Figure 9 and Figure 10 The operating component 53 includes a guide 531 connected to the axis 514 of the mating member 51, an operating member 533 that drives the guide 531 to move along the axis 514, and an elastic member 534. An adjusting member 52 is sleeved on the guide 531 and located between the mating member 51 and the operating member 533. When the operating member 533 is switched to the locked state, it drives the adjusting member 52 to engage with the base 54. When the operating member 533 is switched to the unlocked state, the elastic member 534 drives the adjusting member 52 to disengage from the mating member 51 and move to the unlocked area 516.

[0176] Therefore, when the operating member 533 is switched to the locked state, it drives the adjusting member 52 to compress along the axis 514, so that it engages with the mating member 51; when the operating member 533 is switched to the unlocked state, the adjusting member 52 loses the driving force of the operating member 533 and will move in the opposite direction along the axis 514 to the unlocked area 516 under the elastic force of the elastic member 534, and disengage from the mating member 51.

[0177] Optionally, the elastic element 534 can be a spring, elastic rubber, elastic metal sheet, etc.

[0178] Further, please refer to Figure 9 and Figure 10The operating member 533 includes a cam portion 53b rotatably connected to the guide member 531 and a rotating portion 53a connected to the cam portion 53b. The circumferential side surface of the cam portion 53b contacts the adjusting member 52. Therefore, when the operating member 533 is switched to the locked state, the rotating portion 53a rotates the cam portion 53b, causing the most prominent point on the circumferential side surface of the cam portion 53b to abut against the adjusting member 52, driving the adjusting member 52 to move towards and engage with the mating member 51. When the operating member 533 is switched to the unlocked state, the rotating portion 53a rotates the cam portion 53b, causing the most prominent point on the circumferential side surface of the cam portion 53b to move away from the adjusting member 52, causing the adjusting member 52 to disengage from the mating member 51 under the action of the elastic member 534.

[0179] In some embodiments, please refer to Figure 10 The mating member 51 has a first mating portion 515 spaced around the axis 514 on one side facing the adjusting member 52, and the adjusting member 52 has a second mating portion 522 that engages with the first mating portion 515. The first mating portion 515 and the second mating portion 522 can have various structural designs, such as the first mating portion 515 being designed as a groove and the second mating portion 522 being designed as a convex structure to cooperate with it. Specifically, in some embodiments, both the first mating portion 515 and the second mating portion 522 can be toothed structures.

[0180] In this example, the adjusting component 50 adopts a grinding disc structure. When it is necessary to adjust the pusher component 20, the operating component 533 is first switched to the unlocked state to disengage the adjusting component 52 from the mating component 51, and then the pusher component 20 is rotated. It is understood that the structure of the adjusting component 50 is not limited to this, and other components may also be used.

[0181] As another example, the structure of the adjusting component 50 can be referenced. Figure 11-13 The adjustment component 50 includes a connector 51 connected to the host 10 and an adjustment component 55 connected to the pusher component 20. The adjustment component 55 is used to adjust the overall rotation of the pusher component 20 relative to the host 10 or to lock the pusher component 20 onto the connector 51 so that the overall pusher component 20 is fixed relative to the host 10.

[0182] Further, the adjusting member 55 includes an adjusting handle 551 and a pin 552 connecting the adjusting handle 551. The mating member 51 is a base connected to the main unit 10. At least one of the pusher member 20 and the mating member 51 is provided with a positioning part 56. The adjusting handle 551 is used to drive the pin 552 to move along the length direction of the pin 552, so that the pin engages with or disengages from the positioning part 56. When the pin 552 engages with the positioning part 56, the pusher member 20 is fixed relative to the base 54. When the pin 552 disengages from the positioning part 56, the pusher member 20 can rotate relative to the base 54 so that the user can fold the pusher member 20.

[0183] Specifically, the positioning part 56 can be disposed on the base 54, and the adjusting member 55 can be disposed on the push rods 21 on both sides of the main unit 10. The push rod 21 includes a pin hole passing through it, and the pin 552 of the adjusting member 55 engages with the pin hole, thereby connecting the adjusting member 55 to the push rod 21. The pin 552 partially extends out of the pin hole to engage with the positioning part 56 on the base 54. When the pin 552 is disengaged from the positioning part 56 and fully retracted into the pin hole, the push rod 21 can rotate around the main unit 10. In this embodiment, the positioning part 56 can be a positioning hole, and multiple positioning holes can be distributed in the working position area and the non-working position area, so that the pusher component 20 can be positioned to certain positions in the working position area or the non-working position area. Figure 11 , Figure 12 and Figure 13 Depending on the distribution area of ​​the positioning holes, the positioning holes may include a working area positioning hole 561 and non-working area positioning holes 562 / 563. When the pin 552 mates with the working area positioning hole 561, the push rod 21 is fixed in the working position area. When the pin 552 mates with the non-working area positioning holes 562 / 563, the push rod 21 is fixed in the non-working position area. There may be multiple working area positioning holes 561, arranged along the rotation arc of the push rod 21, so that the push rod 21 is positioned in multiple different positions, allowing the push rod to accommodate users of different heights. There may also be multiple non-working area positioning holes 562 / 563. In this embodiment, there are two non-working area positioning holes: positioning hole 562 and positioning hole 563. Positioning hole 562 is used to position the push rod in the working position area. Figure 12 In its intermediate stored state, positioning hole 563 is used to position the push rod as follows: Figure 13 The push rod 21 can be fully stowed. It is understandable that multiple positioning holes can be provided between positioning holes 562 and 563 along the rotation arc of the push rod 21, allowing the push rod 21 to be positioned in multiple locations within the non-working area. Of course, the pusher component 20 may not be fixed in the non-working area, meaning the positioning holes can be provided only in the working area.

[0184] Of course, the positioning part 56 can also be provided on the main unit 10 and the push rod 21, that is, the push rod 21 is provided with a pin hole and the base 54 is provided with multiple positioning holes. When the push rod 21 is rotated to the point where the pin hole is coaxial with one of the positioning holes on the base 54, the adjusting member 55 is detachably engaged in the positioning hole and the pin hole to position the push rod 21 to the base 54.

[0185] The following describes the configuration of the signal unit 40 provided in this application, which feeds back different state signals according to the position of the pusher component 20.

[0186] In one embodiment, the signal unit 40 may be a mechanically triggered switch. For example... Figure 11-13The signal unit 40 is configured as a micro switch 43. The micro switch 43 is triggered or released in response to changes in the position of the push rod 21 as the push rod 21 rotates, outputting different state signals. The push rod 21 is connected to the base, and the micro switch 43 is mounted on the base 54, thus allowing for sensitive response to the rotation of the push rod 21. The micro switch 43 includes a triggering part and a switching element. The switching element is controlled by the triggering part to switch between an open state and an on state. When the micro switch is in the open or on state, the signal unit 40 selectively feeds back either a first state signal or a second state signal.

[0187] Specifically, the switch unit is connected to the main control unit 14. When the trigger unit is triggered, the main control unit 14 can detect the level change in the circuit caused by the change in the on / off state of the switch unit. The electrical signals fed back by the circuit are different when the switch unit is in the on and off states. For example, when the microswitch is a normally open switch, when the trigger unit is triggered, the switch unit switches from the off state to the on state, and the main control unit 14 can detect the voltage signal changing from a high level to a low level. When the trigger unit is released, the switch unit switches from the on state to the off state, and the main control unit 14 can detect the voltage signal changing from a low level to a high level. Of course, the microswitch can also be a normally closed switch. Therefore, by detecting the level change in the circuit, the main control unit 14 can determine whether the trigger unit is currently triggered, and thus determine the position of the push rod, thereby executing different motor starting logic.

[0188] As an example, the micro switch 43 is a normally open switch and is located in the non-working position area of ​​the rotating region of the pusher component 20. More specifically, the micro switch 43 is positioned on the rotation path of the pusher component 20 in the non-working position area, so that the micro switch can be continuously triggered whenever the pusher component 20 rotates within the non-working position area. Figure 12 and Figure 13 As shown, the micro switch 43 is triggered when the pusher component 20 is in either the intermediate or fully retracted state. Therefore, when the pusher component 20 rotates to the non-working position area, the micro switch 43 is triggered and feeds back a second state signal. The main control unit 14 receives the second state signal and executes the second control logic. When the pusher component 20 rotates to the working position area, the micro switch 43 is released and feeds back a first state signal. When the main control unit 14 receives the first state signal, it executes the first control logic.

[0189] As another example, the micro switch 43 is a normally open switch and is located in the working position area of ​​the rotating area of ​​the pusher component 20. More specifically, the micro switch 43 is positioned on the rotation path of the pusher component 20 in the working position area, so that the micro switch can be continuously triggered whenever the pusher component 20 rotates in the working position area. When the pusher component 20 is locked in multiple positions in the working position area, the micro switch 43 is triggered and feeds back a first state signal. The main control unit 14 receives the first state signal and executes the first control logic. When the pusher component 20 rotates to the non-working position area, the micro switch 43 is released and feeds back a second state signal. When the main control unit 14 receives the second state signal, it executes the second control logic.

[0190] In this embodiment, since the signal unit 40 is a micro switch, by setting the position of the micro switch and its normally open or normally closed form, the micro switch is released and the signal unit 40 feeds back a first state signal as long as the pusher component 20 is in the working position area, regardless of whether the pusher component 20 is locked or unlocked relative to the host 10. As long as the pusher component 20 is in the non-working position area, the micro switch is triggered and the signal unit 40 feeds back a second state signal, regardless of whether the pusher component 20 is locked or unlocked relative to the host 10.

[0191] In one embodiment, the signal unit 40 may also be an electrical sensing unit. Please refer to [reference needed]. Figure 5 and Figure 6 The signal unit 40 is configured as a sensor, which includes a first component 41 and a second component 42. One of the first component 41 and the second component 42 is located on the main unit 10, and the other is located on the pusher component 20 or the adjustment component 52. The first component 41 is configured to feed back a first state signal or a second state signal to the control unit based on the strength of the signal emitted by the second component 42. There are two possible designs for the relationship between the sensed signal strength and the feedback state signal: for example, the first state signal is fed back when the sensed signal is greater than a preset threshold, and the second state signal is fed back when the sensed signal is less than or equal to the preset threshold; or, the first state signal is fed back when the sensed signal is less than or equal to the preset threshold, and the second state signal is fed back when the sensed signal is greater than the preset threshold. The sensed signal can be parameters such as magnetic field strength, light intensity, or pressure magnitude. The signal unit 40 outputs the corresponding state signal to the main control unit 14 based on these changes.

[0192] The following explanation uses the example of feeding back a first state signal when the sensed signal is greater than a preset threshold, and feeding back a second state signal when the sensed signal is less than or equal to the preset threshold. (Reference) Figure 5 and Figure 6When the adjusting component 50 has a grinding disc tooth structure, that is, when the adjusting component 50 includes a mating part 51, an adjusting part 52, and an operating component 53, the first component 41 is disposed on the main unit, and the second component 42 is disposed on the pusher component 20. When the mating part 521 on the adjusting part 52 is mated at the first position 511 (i.e., the working position area) of the mating part 51, the distance between the first component 41 and the second component 42 is relatively close. The first component 41 senses that the signal emitted by the second component 42 is greater than a preset threshold, and thus the first component 41 sends a first status signal to the main control unit 14. When the user operates the operating component 53, causing the mating part 521 on the adjusting part 52 to disengage, since the pusher component 20 or the adjusting part 52 moves away from the main unit 10 along the axis 514, the position of the second component 42 moves with the pusher component 20, causing the distance between the first component 41 and the second component 42 to increase. Therefore, the first component 41 senses that the signal emitted by the second component 42 is less than or equal to the preset threshold, and the first component 41 sends a second status signal to the main control unit 14. When the adjusting member 52 enters the non-working position area, the position of the second component 42 moves with the pusher component 20, causing the distance between the first component 41 and the second component 42 to continuously increase. The first component 41 senses that the signal emitted by the second component 42 is continuously weakening and continuously sends a second status signal to the main control unit 14. Therefore, when the pusher component 20 is in the working position area and locked relative to the main unit, the signal unit 40 feeds back the first status signal; when the pusher component 20 is in the working position area and unlocked from the main unit 10, the signal unit 40 feeds back the second status signal. When the pusher component 20 is in the non-working position area, the signal unit 40 feeds back the second status signal.

[0193] It should be noted that the signal emitted by the second component 42 can be a magnetic field; for example, the second component 42 could be a magnet, and the first component 41 could be a Hall element. Furthermore, when the pusher component 20 is in the working state, the first component 41 senses a signal strength emitted by the second component 42 that is greater than or equal to a first threshold. When the pusher component 20 is in the retracted state, the first component 41 senses a signal strength emitted by the second component 42 that is less than or equal to a second threshold, wherein the first threshold is greater than the second threshold. For example, refer to... Figure 5 When the mating part 521 is engaged with the first position 511 (working position area), the Hall element is close to the magnet, enabling it to sense a strong magnetic field and send a high-level signal, such as 5V, to the control unit; Reference Figure 6 When the mating part 521 moves away from the first position, the Hall element is farther from the magnet and senses a weaker magnetic field, sending a low-level signal, such as 1.5V, to the control unit. Thus, by setting a reasonable threshold, the state of the pusher component 20 can be accurately determined, allowing the main control unit 14 to obtain the corresponding state signal and reasonably control the start-up delay time of the functional component 30.

[0194] In some embodiments, please refer to Figure 14 The second component 42 is disposed on the pusher component 20 or the adjusting component 52, and forms a signal coverage area 44 on the main unit 10 that enables the first component 41 to feed back a first status signal to the main control unit 14. When the pusher component 20 rotates within the working position area, the position of the signal coverage area 44 formed by the second component 42 on the main unit also changes accordingly, and the overlapping part between each signal coverage area 44 defines an overlapping area. When the mating part 521 is engaged in each gear position area 51a, the first component 41 is located in the overlapping area. With this design, regardless of which gear position area 51a the mating part 521 is engaged in, it can always be ensured that the first component 41 is within the signal coverage area 44, and the control signal fed back to the main control unit 14 is always the first control signal.

[0195] The signal unit provided in this embodiment is illustrated using the adjustment component in the first example. It is understood that the two signal units provided in the above embodiments can be applied to power tools having the aforementioned two adjustment components.

[0196] The power tool provided in this embodiment detects the position of the push handle component 20 by setting a signal unit 40, and feeds back different status signals according to the position of the push handle component 20. The control circuit executes different motor starting logic according to different status signals, so that when the push handle component 20 is in the working position area, the user can easily control the motor to start. When the push handle component 20 is in the non-working position area, the difficulty for the user to start the motor by operating the switch component increases, the probability of motor accidental start decreases, thereby improving the safety of the power tool when the push handle component 20 is in the non-working position area.

[0197] Please refer to Figure 15 This application provides a motor control method for the power tool 100 in the above embodiments, wherein, as Figure 1As shown, the power tool 100 includes a main unit 10, a push handle 20, an adjustment mechanism and a coupling, a signal unit 40, and a motor 13. The push handle 20 is connected to the main unit 10 and is rotatable from the main unit 10. The rotation area of ​​the push handle 20 includes a working position area and a non-working position area. When the push handle 20 is in the working position area, it is operated by the user to move the main unit 10. When the adjustment mechanism engages with the coupling, the push handle 20 is locked to the main unit 10. When the adjustment mechanism disengages from the coupling, the push handle 20 is unlocked from the main unit 10 and can rotate around the main unit 10. The functional components include the motor 13 and a working part. The motor drives the working part to move within a set path or working area and / or perform cutting tasks. The signal unit 40 is used to respond to changes in the position of the pusher component 20 by feeding back different status signals. When the pusher component 20 is in the working position area and is locked relative to the main unit 10, the signal unit 40 feeds back a first status signal. When the pusher component 20 is in the non-working position area, the signal unit 40 feeds back a second status signal. The motor 13 is used to drive the power tool to move within a set path or working area and / or perform cutting tasks. Specific limitations of the power tool can be found in the aforementioned Embodiment 1, and will not be repeated here.

[0198] The motor control method is executed by the main control unit within the control circuit, and includes the following steps:

[0199] Step S100: Receive the status signal fed back by the signal unit 40;

[0200] Step S200: When the status signal is the first status signal, control the motor 13 to start working according to the first control logic;

[0201] Step S300: When the status signal is the second status signal, the motor 13 is started to work according to the second control logic, wherein the second control logic is different from the first control logic.

[0202] In one embodiment, the power tool 100 includes a power-on switch, which is triggered in response to a user operation to switch a control circuit between an active and inactive state. When the control circuit is active, it allows current from the power supply to flow to the motor; when the control circuit is inactive, it prevents current from flowing to the motor. The time from when the power-on switch is triggered until the control circuit switches from an inactive to an active state is defined as the trigger holding time of the power-on switch. A motor start switch includes a first operating element, which outputs a motor start signal in response to a user operation. When the control circuit is active and the motor start switch is triggered, the control circuit controls the current from the power supply to flow to the motor, causing the motor to drive the working part to operate. The control circuit enters the active state and is allowed to receive the motor start signal for a preset time, wherein the preset time is defined as the allowed trigger time of the motor start switch.

[0203] Under the first control logic and the second control logic, the trigger holding time of the power-on switch is different; or under the first control logic and the second control logic, the allowable trigger time of the motor start switch is different; or under the first control logic and the second control logic, both the trigger holding time of the power-on switch and the allowable trigger time of the motor start switch are different.

[0204] In one embodiment, reference Figure 16 In step S200, the first control logic includes at least:

[0205] Step S210: When the status signal is the first status signal, determine whether the trigger holding time of the power-on switch has reached the first holding time;

[0206] Step S211: When the first hold time is reached, the control circuit is allowed to enter the active state;

[0207] Step S212: If the first holding time has not been reached, the control circuit is prohibited from entering the active state.

[0208] refer to Figure 17 In step S300, the second control logic includes at least:

[0209] Step S310: When the status signal is the second status signal, determine whether the trigger holding time of the main power-on switch has reached the second holding time;

[0210] Step S311: When the second hold time is reached, the control circuit is allowed to enter the active state;

[0211] Step S312: If the second holding time has not been reached, the control circuit is prohibited from entering the active state, wherein the second holding time is not less than three times the first holding time. Preferably, the second holding time is greater than or equal to 2 seconds.

[0212] In the above embodiments, by setting different trigger holding times for the power-on switch under the first control logic and the second control logic, it becomes more difficult for the user to control the motor to start under the second control logic, thereby improving the safety of the power tool.

[0213] In one embodiment, in step S200, the first control logic includes at least: the control circuit enters an active state, allowing the reception of a motor start signal within a first preset time, and upon receiving the motor start signal, controlling the current from the power supply to flow to the motor so that the motor drive unit can work.

[0214] In step S300, the second control logic includes at least: when the control circuit enters the active state, it is allowed to receive a motor start signal within a second preset time period, or from the time the control circuit enters the active state, it receives a motor start signal at fixed time points at preset time intervals; and when the motor start signal is received, it controls the current from the power supply to flow to the motor so that the motor drive working part works, and the second preset time is less than the first preset time.

[0215] Preferably, the second preset time is less than or equal to 5 seconds.

[0216] In the above embodiments, by setting different allowable trigger times for the first operating element under the first control logic and the second control logic, it becomes more difficult for the user to control the motor to start under the second control logic, thereby improving the safety of the power tool.

[0217] It is understandable that the trigger holding time of the power-on switch and the allowable trigger time of the motor start switch can be set to be different at the same time. For specific implementation methods, please refer to the aforementioned embodiments on power tools, which will not be repeated here.

[0218] In another embodiment, the motor start switch further includes an unlocking element. The unlocking element can be configured as a mechanical actuation mechanism used to control the switching of the first operating element between a locked state and an unlocked state. The mechanical actuation mechanism includes a stop operably coupled to the first operating element. When the unlocking element is not operated, the stop abuts against the first operating element, preventing the first operating element from being operated to move toward the push rod, thereby preventing the output of a motor start signal; at this time, the first operating element is in a locked state. When the unlocking element is operated, the stop releases the first operating element, allowing the first operating element to be operated to move toward the push rod, and the first operating element can be triggered to output a motor start signal; at this time, the first operating element is in an unlocked state. Therefore, under the second control logic, the user needs to trigger the unlocking element and the first operating element within a preset time to control the motor start.

[0219] The unlocking element can also be configured as an electronic switch to output an unlocking signal in response to user operation. When the unlocking element is configured as an electronic switch, under the first control logic, the control circuit is configured to receive the unlocking signal and the motor start signal within a first preset time after entering the active state. Under the second control logic, the control circuit is configured to receive the unlocking signal and the motor start signal within a second preset time after entering the active state, wherein the second preset time is shorter than the first preset time. By configuring two motor start switches and shortening the time for the control circuit to receive the two switch signals under the second control logic, the difficulty of starting the motor under the second control logic is increased, thereby improving the safety of the power tool when the push handle is in the retracted state.

[0220] In one embodiment, when the unlocking element is an electronic switch, the trigger holding time of the unlocking element can also be limited to improve the safety of the power tool.

[0221] Specifically, the first control logic includes at least the following: when the control circuit enters the activated state, it determines whether the continuous triggering time of the unlocking element since it was triggered and the continuous triggering time of the triggered state has reached the third holding time; when the third holding time is reached, it allows the receiving of the motor start signal; when the motor start signal is received, it controls the current from the power supply to flow to the motor so that the motor drive working part can work.

[0222] The second control logic includes at least the following: the control circuit enters the active state and determines whether the continuous triggering time of the unlocking element since it was triggered has reached the fourth holding time; if the fourth holding time is reached, it allows the receiving of a motor start signal, and upon receiving the motor start signal, it controls the current from the power supply to flow to the motor to drive the working part of the motor; wherein, the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times the third holding time. Because the fourth holding time is greater than the third holding time, under the second control logic, the user needs to trigger the unlocking element for a longer period of time for the control circuit to allow the receiving of the motor start signal. For the user, under normal operating conditions, triggering the unlocking element briefly and then triggering the first operating element is sufficient to start the motor. Therefore, when the pusher is in the retracted state, the user is unlikely to think that a longer triggering of the unlocking element followed by triggering the first operating element is required to start the motor. Even if the user accidentally triggers the unlocking element, it will not be a prolonged accidental trigger, thus improving the safety of using power tools.

[0223] In another embodiment, when the unlocking element is an electronic switch, the second control logic further includes: when the control circuit enters the active state, it allows receiving an unlocking signal at fixed time points at preset intervals after the control circuit enters the active state. That is, under the second control logic, the unlocking element can only be triggered at a fixed time after the control circuit enters the active state to receive the unlocking signal; if the time has not reached or has exceeded the fixed time, the control circuit does not allow receiving the unlocking signal. Under normal operating conditions, the user can trigger the unlocking element for a period of time after activating the power switch. Therefore, when the power tool is in the retracted state, the user is unlikely to think that the unlocking element needs to be triggered at a fixed time to be effective; even if the user accidentally triggers it, the probability of accidental triggering at a fixed time is very low. Therefore, the solution provided in this embodiment can improve the safety of using power tools.

[0224] In one embodiment, since the motor start switch includes an unlocking element and a first operating element, it can not only limit the continuous triggering time of the unlocking element, but also limit the allowed triggering time of the first operating element to further increase the difficulty of starting the motor under the second control logic.

[0225] Specifically, the first control logic also includes: from the time the unlocking element is triggered, the continuous triggering time for maintaining the triggered state reaches a third holding time, allowing the motor start signal to be received within a first preset time.

[0226] The second control logic also includes: the unlocking element maintains the triggered state for a continuous triggering time of up to a fourth holding time after being triggered, allowing the motor start signal to be received within a second preset time, where the second preset time is less than the first preset time. Specifically, the second preset time is less than or equal to 5 seconds, and the first preset time is greater than or equal to 30 seconds.

[0227] Alternatively, the second control logic may further include: the unlocking element maintains the triggered state for a continuous triggering time up to a fourth holding time from the start of the triggering process, allowing the receiving of a motor start signal at a fixed time point between the reaching of the fourth holding time and a preset time interval. The preset time may be the 5th second, 10th second, 15th second, or 20th second after the reaching of the fourth holding time.

[0228] In one embodiment, the power tool may not have a power switch 11, and the control circuit can be activated when the power tool is plugged into a power source 12. Specifically, the power tool also includes a power supply mounting section for removably mounting a power source, which includes a battery pack. The control circuit activates in response to the battery pack being installed in the battery pack mounting section. The control circuit includes a motor start switch, which includes an unlocking element and a first operating element. The unlocking element outputs an unlock signal in response to a user trigger, and the first operating element outputs a motor start signal in response to a user trigger.

[0229] Based on this, the first control logic includes at least the following: when the control circuit enters the active state, it determines whether the continuous triggering time from when the unlocking element is triggered until it outputs an unlocking signal to the control circuit has reached the third holding time; when the third holding time is reached, it allows the receiving of the motor start signal; when the motor start signal is received, it controls the current from the power supply to flow to the motor so that the motor drive working part can work.

[0230] The second control logic includes at least the following: when the control circuit enters the active state, it determines whether the continuous triggering time from when the unlocking element is triggered until it outputs an unlocking signal to the control circuit has reached the fourth holding time; when the fourth holding time is reached, it allows the receiving of a motor start signal; when the motor start signal is received, it controls the current from the power supply to flow to the motor so that the motor drive working part works; wherein, the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times the third holding time.

[0231] Furthermore, the first control logic also includes: from the moment the self-unlocking element is triggered until the continuous triggering time for outputting an unlocking signal to the control circuit reaches the third holding time, it is allowed to receive a motor start signal within a first preset time.

[0232] The second control logic also includes: from the time the self-unlocking element is triggered until the continuous triggering time for outputting an unlocking signal to the control circuit reaches the fourth holding time, it is allowed to receive a motor start signal within a second preset time, the second preset time being less than the first preset time; or from the time the self-unlocking element is triggered and the time for maintaining the triggering state reaches the fourth holding time, it is allowed to receive a motor start signal at fixed time points at preset intervals.

[0233] In one embodiment, the control method further includes: when a first state signal is received, allowing the motor to start at a first speed; and when a second state signal is received, allowing the motor to start at a second speed, wherein the second speed is less than or equal to one-third of the first speed. Preferably, the second speed is less than or equal to one-fifth of the first speed.

[0234] In one embodiment, the control method further includes: controlling the motor to run at a second speed for a preset time and then stopping the motor, wherein the preset time is less than or equal to 5 seconds.

[0235] For specific limitations regarding the above control method, please refer to the limitations of the power tools in the foregoing embodiments, which will not be repeated here. The above control method collects the status signals fed back by the signal unit when the push handle is in different positions, and executes different start-up logic according to different status signals. This reduces the probability of accidental start-up of the power tool when the push handle is in the retracted state, thereby reducing the user's risk and improving the safety of the power tool.

[0236] likeFigure 1 As shown, a third embodiment of this application provides a power tool 100, including a main unit 10, a push handle 20, an adjusting member 52 and a connecting member 51, functional components, a signal unit 40, and a control circuit. The push handle 20 is connected to the main unit 10 and is rotatable relative to the main unit 10 around the connection point between the push handle 20 and the main unit 10. The rotation area of ​​the push handle 20 includes a working position area and a non-working position area. When the push handle 20 is in the working position area, it is operated by the user to move the main unit 10. The adjusting member 52 and the connecting member 51 are used to adjust the position of the push handle 20. When the adjusting member 52 engages with the connecting member 51, the push handle 20 is locked to the main unit 10. When the adjusting member 52 disengages from the connecting member 51, the push handle 20 is unlocked from the main unit 10 and can rotate around the main unit 10. The functional components include a motor 13 and a working part. The motor drives the working part to move within a set path or working area and / or perform cutting tasks. The signal unit 40 is used to respond to changes in the position of the pusher component 20 by feeding back different status signals. When the pusher component 20 is in the working position area and is locked relative to the main unit 10, the signal unit 40 feeds back a first status signal. When the pusher component 20 is in the non-working position area, the signal unit 40 feeds back a second status signal. The control circuit receives the status signals fed back by the pusher component 20 and controls the operating speed of the motor 13 when it starts. When the control circuit receives the first status signal, it allows the motor 13 to start working at a first speed. When the control circuit receives the second status signal, it allows the motor 13 to start working at a second speed, which is no more than one-third of the first speed.

[0237] In one embodiment, when the motor 13 operates at a second speed, the main control unit 14 is further configured to control the motor 13 to stop after operating for a preset time, wherein the preset time is less than 5 seconds. By controlling the motor 13 to stop after operating for a preset time, safety risks can be further reduced.

[0238] In one embodiment, the main control unit 14 is further configured to adjust the start-up logic of the motor 13 according to a status signal. When the main control unit 14 receives a first status signal, it uses a first control logic to control the motor 13 to start working. When the main control unit 14 receives a second status signal, it uses a second control logic to control the motor to start working, and the second control logic is different from the first control logic.

[0239] For specific limitations regarding the aforementioned power tools, please refer to the limitations of the power tools in the foregoing embodiments, which will not be repeated here. The power tool 100 provided in the above embodiments allows different starting speeds for the motor 13 when the push handle 20 is in the working position area and the non-working position area. By reducing the starting speed of the motor 13 when the push handle 20 is in the non-working position area, even if the user accidentally starts the motor 13 during the folding process, it will not cause harm to the user, thereby reducing the user's risk and improving the safety of the power tool 100.

[0240] Another embodiment of this application provides a control method for an electric tool, which is based on the electric tool provided in the above embodiments. This method is executed by a main control unit in a control circuit, such as... Figure 18 As shown, the control method includes the following steps:

[0241] Step S400: Determine the type of the received status signal;

[0242] Step S500: When the first status signal is received, the motor is allowed to start working at the first speed;

[0243] Step S600: When the second state signal is received, the motor is allowed to start working at the second speed, wherein the second speed is not greater than one-third of the first speed.

[0244] Preferably, the second rotational speed is no more than one-fifth of the first rotational speed.

[0245] In one embodiment, the control method further includes: controlling the motor to run at a second speed for a preset time, and then controlling the motor to stop. The preset time is less than or equal to 5 seconds.

[0246] For specific limitations regarding the above control method, please refer to the limitations of the power tools in the foregoing embodiments, which will not be repeated here. The power tool 100 provided in the above embodiments allows different starting speeds for the motor 13 when the push handle 20 is in the working position area and the non-working position area. By reducing the starting speed of the motor 13 when the push handle 20 is in the non-working position area, even if the user accidentally starts the motor 13 during the folding push rod process, it will not cause harm to the user, thereby reducing the user's usage risk and improving the safety of the power tool 100.

[0247] Another embodiment of this application provides a power tool, including: a main unit; a pusher component connected to the main unit, the pusher component being rotatable relative to the main unit around the connection point between the pusher component and the main unit, the rotation area of ​​the pusher component including a working position area and a non-working position area other than the working position area, the pusher component being used by the user to push the main unit to move when in the working position area; an adjusting member and a mating member, when the adjusting member and the mating member are engaged, the pusher component is locked to the main unit, when the adjusting member and the mating member are disengaged, the pusher component is unlocked from the main unit and can rotate around the main unit; a signal unit, the signal unit being used to respond to changes in the position of the pusher component by feeding back different status signals, when the pusher component is in the working position area and the pusher component is relatively locked to the main unit, the signal unit feeding back a first status signal, when the pusher component is in the non-working position area, the signal unit feeding back a second status signal; a functional component, including a motor and a working part, the motor being used to drive the working part to move within a set path or working area, and / or perform cutting tasks; and a control unit, used to receive the status signals fed back by the signal unit and adjust the starting logic of the motor according to the status signals. When the control unit receives a first status signal, it uses a first control logic to control the motor to start working. When the control unit receives a second status signal, it uses a second control logic to control the motor to start working, and the second control logic is different from the first control logic. The control unit is also used to allow the motor to start working at a first speed when it receives the first status signal, and to allow the motor to start working at a second speed when it receives the second status signal. The second speed is less than the first speed, and the second speed is less than or equal to one-third of the first speed.

[0248] Preferably, the second rotational speed is less than or equal to one-fifth of the first rotational speed.

[0249] For specific limitations regarding the aforementioned power tools, please refer to the limitations of the power tools in the foregoing embodiments, which will not be repeated here. The power tools provided in the above embodiments, when the push handle is in the working position area and the non-working position area, the signal unit feeds back different status signals. The control unit executes different starting logic according to the different status signals, making it more difficult for the motor to start when the push handle is in the retracted state, reducing the probability of accidental starting of the power tool, thereby reducing the user's risk. Even if the motor starts, the control unit allows different starting speeds for the motor when the push handle is in different positions. By reducing the starting speed of the motor when the push handle is in the non-working position area, even if the user accidentally starts the motor during the folding of the push handle, it will not cause injury to the user, thereby reducing the user's risk and improving the safety of the power tool.

[0250] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0251] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0252] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0253] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0254] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0255] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0256] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A power tool characterized by comprising: The electric tool comprises: a main body; a functional component including a working part and a motor driving the working part; a handle component connected to the main body, the handle component being capable of being in a working state and a storage state, when the handle component is in the working state, the handle component is capable of being fixed at a first position; when the handle component is rotated from the first position to a third position, the handle component is capable of being switched from the working state to the storage state; a signal unit, when the handle component is in the first position, the signal unit feeds back a first state signal; when the handle component is in the third position, the signal unit feeds back a second state signal different from the first state signal; the electric tool further comprises a control circuit, the control circuit controls the motor to start working according to the first state signal received in a first control logic, the control circuit controls the motor to start working according to the second state signal received in a second control logic, the second control logic being different from the first control logic.

2. The power tool of claim 1, wherein, when the handle component is in the working state, the handle component is capable of being locked at a preset position of the main body and capable of controlling the electric tool to perform a working task.

3. The power tool of claim 1, wherein, the electric tool is placed on the ground, the left side of the electric tool parallel to the longitudinal direction of the electric tool is defined as the front side of the electric tool, the right side of the electric tool in the longitudinal direction of the electric tool is defined as the right side of the electric tool, the handle component has a first end and a second end, the first end is pivotably connected to the main body, and the second end is capable of being held by a user to push the electric tool to move; when the handle component is in the working state, the second end is located on the right side of the main body relative to the first end, and when the handle component is in the storage state, the second end is located on the front side of the main body relative to the first end.

4. The power tool of any one of claims 1 to 3, wherein the electric tool further comprises a motor starting switch and a power-on switch, the motor starting switch is used to control the motor to start in response to user operation, and the power-on switch is triggered in response to user operation to switch the control circuit between an inactive state and an active state; when the control circuit is in the active state, the control circuit allows the current of a power supply to flow to the motor, and when the control circuit is in the inactive state, the control circuit prohibits the current of the power supply from flowing to the motor, wherein the trigger holding time of the power-on switch is defined as the time from when the power-on switch is triggered to when the control circuit is switched from the inactive state to the active state; the motor starting switch comprises a first operating element, the first operating element outputs a motor starting signal in response to user operation, the control circuit is in the active state and the first operating element is triggered, the control circuit controls the current of the power supply to flow to the motor, so that the motor drives the working part to work, wherein the control circuit enters the active state, and the control circuit is allowed to receive the motor starting signal within a preset time, and the preset time is defined as the allowed trigger time of the first operating element. Under the first control logic and the second control logic, the trigger hold time of the power-on switch is different; and / or Under the first control logic and the second control logic, the allowed trigger time of the first operation element is different.

5. The power tool of claim 4, wherein, The control circuit further comprises a timing unit, so that the control circuit judges whether the trigger hold time of the power-on switch meets a preset condition according to the timing time of the timing unit, and / or The control circuit further comprises a timing unit, so that the control circuit judges whether the allowed trigger time of the first operation element meets a preset condition according to the timing time of the timing unit.

6. The power tool of claim 4, wherein, The first control logic at least includes: when the trigger hold time of the power-on switch reaches a first hold time, the control circuit is allowed to enter the active state; The second control logic at least includes: when the trigger hold time of the power-on switch reaches a second hold time, the control circuit is allowed to enter the active state; Wherein, the second hold time is greater than the first hold time, and the second hold time is greater than or equal to 3 times of the first hold time.

7. The power tool of any one of claims 4 or 6, wherein, The first control logic further includes: when the control circuit enters the active state, the allowed trigger time of the first operation element is configured within a first preset time, and the control circuit receives the motor start signal within the first preset time, controls the current of the power supply to flow to the motor, and makes the motor drive the working part to work; The second control logic at least includes: when the control circuit enters the active state, the allowed trigger time of the first operation element is configured within a second preset time, and the control circuit receives the motor start signal within the second preset time, controls the current of the power supply to flow to the motor, and makes the motor drive the working part to work; Wherein, the second preset time is less than the first preset time.

8. The power tool of claim 7, wherein, The second hold time is greater than or equal to 2s; and the second preset time is less than or equal to 5s.

9. The power tool of claim 7, wherein, The motor start switch further comprises an unlocking element, which is configured to output an unlocking signal in response to user operation; The first control logic at least includes: when the control circuit enters the active state, the control circuit allows to receive the motor start signal to control the current of the power supply to flow to the motor to make the motor drive the working part to work, when the continuous trigger time of the unlocking element from being triggered to the control circuit receiving the unlocking signal reaches a third hold time; The second control logic at least includes: when the control circuit enters the active state, the control circuit allows to receive the motor start signal to control the current of the power supply to flow to the motor to make the motor drive the working part to work, when the continuous trigger time of the unlocking element from being triggered to the control circuit receiving the unlocking signal reaches a fourth hold time; The fourth hold time is greater than the third hold time, and the fourth hold time is greater than or equal to 3 times of the third hold time.

10. The power tool of claim 1, wherein, The power tool further comprises a power supply mounting portion for mounting a power supply, the power supply comprising a battery pack, the battery pack being detachably connected to the power supply mounting portion to supply power to the power tool, the control circuit entering an active state in response to the battery pack being mounted to the power supply mounting portion; The motor start switch comprises an unlocking element and a first operation element, the unlocking element outputting an unlocking signal in response to user operation, and the first operation element outputting a motor start signal in response to user operation; The first control logic further comprises: when the control circuit is in the active state, the control circuit allowing the motor start signal to be received and controlling the current of the power supply to flow to the motor according to the motor start signal to drive the motor to drive the working portion to work, when the unlocking element is triggered and the duration of the triggering of the unlocking element until the control circuit receives the unlocking signal reaches a third holding time; The second control logic further comprises: when the control circuit is in the active state, the control circuit allowing the motor start signal to be received and controlling the current of the power supply to flow to the motor according to the motor start signal to drive the motor to drive the working portion to work, when the unlocking element is triggered and the duration of the triggering of the unlocking element until the control circuit receives the unlocking signal reaches a fourth holding time; The fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to 3 times the third holding time.

11. The power tool of any one of claims 1 to 3, wherein, The power tool is a hand-push grass trimmer; The motor comprises a cutting motor, and the working portion comprises a cutting blade, the cutting motor being configured to drive the cutting blade to move to perform cutting work; And / or The motor comprises a self-driving motor, and the working portion comprises a moving assembly, the self-driving motor being configured to drive the moving assembly to move to drive the main machine to move.

12. The power tool of any one of claims 1 to 3, wherein, The power tool further comprises an adjusting member and a mating member, when the adjusting member cooperates with the mating member, the handle component is locked to the main machine, and when the adjusting member disengages from the mating member, the handle component is unlocked from the main machine and can rotate around the main machine; The signal unit is configured as a mechanical trigger switch, the signal unit being triggered or released in response to a change in the position of the handle component and outputting the second state signal or the first state signal to the control circuit; or the signal unit is configured as an electrical sensing unit, the signal unit comprising a first component and a second component, one of the first component and the second component being arranged on the main machine and the other being arranged on the handle component or the adjusting member, the first component being configured to feed back the first state signal or the second state signal to the control circuit according to the strength of the signal emitted by the second component.

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