Patent Description:
A mower is generally a machine used by a user to mow home lawns. A common mower has a tool body and a handle device, and the handle device can be movably connected to the tool body. The user can control, by pushing the handle device, the mower to walk and mow grass. However, various control switches and controllers on the handle device need to communicate with a controller of the tool body. Thus, the handle device typically has a hollow connecting rod assembly in which various electrical connecting wires are disposed. During the expansion and retraction of the connecting rod assembly, the connecting wires are also easily damaged, resulting in unstable or ineffective control performance between the handle device and the tool body. In addition, a complex wiring mode in the connecting rod assembly also increases the difficulty of subsequent maintenance.

To overcome the deficiencies of the related art, the present application provides a hand-pushed power tool according to claim <NUM>. Preferred embodiments are presented in the dependent claims.

The present application is described below in detail in conjunction with drawings and examples. It is to be understood that the examples described herein are intended to illustrate and not to limit the present application. Additionally, it is to be noted that for ease of description, only part, not all, of structures related to the present application are illustrated in the drawings.

It is to be understood that a handle device in the present application is applicable to a mower and other large garden power tools such as a snow thrower and a blower. In this example, the mower is used as an example for description.

Referring to <FIG>, a mower <NUM> is a hand-pushed power tool. The mower <NUM> includes a tool body <NUM> and a handle device <NUM>. The tool body <NUM> includes at least a working assembly and a control unit, where the working assembly may include a walking assembly <NUM> such as walking wheels and a cutting assembly <NUM> such as a cutting blade, and the control unit may include a drive motor <NUM> controlling the walking assembly <NUM> to walk and a cutting motor <NUM> controlling the cutting assembly <NUM> to perform a cutting function. The tool body <NUM> may further include a chassis <NUM>, where the chassis <NUM> can accommodate the cutting assembly <NUM>, and the walking assembly <NUM> can support the chassis <NUM>.

The handle device <NUM> is connected to the tool body <NUM>, where the handle device <NUM> is connected to a rear end of the tool body <NUM>. The handle device <NUM> is operated by a user. The handle device <NUM> is also rotatable relative to the tool body <NUM> to be adapted to users with different heights. The handle device <NUM> is also rotatable relative to the tool body <NUM> to a folded state, and in this case, the mower <NUM> occupies a relatively small space, thereby facilitating the storage of the mower <NUM>.

As shown in <FIG>, the handle device <NUM> includes at least an operation member <NUM>, a connecting rod assembly <NUM>, and a housing <NUM>. The operation member <NUM> includes a grip <NUM> for the user to hold, a first mounting portion <NUM>, and a second mounting portion <NUM>, where the first mounting portion <NUM> and the second mounting portion <NUM> are disposed at two ends of the grip <NUM> separately. In this example, the first mounting portion <NUM> extends along a first straight line 11a, and the second mounting portion <NUM> extends along a second straight line 11b parallel to the first straight line 11a. When the user needs to push the mower to mow grass, the user may stand behind the handle device <NUM> and hold the grip <NUM> by hand to apply a forward thrust to the grip <NUM> so that the mower <NUM> can be driven to walk on the ground.

The connecting rod assembly <NUM> is used for connecting the operation member <NUM> to the tool body <NUM>. The connecting rod assembly <NUM> includes a first connecting rod <NUM> and a second connecting rod <NUM>, where one end of the first connecting rod <NUM> is connected to the tool body <NUM>, the other end of the first connecting rod <NUM> is connected to the first mounting portion <NUM>, one end of the second connecting rod <NUM> is connected to the tool body <NUM>, and the other end of the second connecting rod <NUM> is connected to the second mounting portion <NUM>. The first connecting rod <NUM> extends along the first straight line 11a, and the second connecting rod <NUM> extends along the second straight line 11b parallel to the first straight line 11a.

The housing <NUM> extends along a left and right direction and connects the first connecting rod <NUM> to the second connecting rod <NUM>. The handle device <NUM> further includes a trigger 14a for starting the cutting blade, where the trigger 14a is rotatably connected to the operation member <NUM>. The housing <NUM> is formed with a first accommodation cavity <NUM>, where the first connecting rod <NUM> extends along the first straight line 11a into the first accommodation cavity <NUM>. The housing <NUM> is also fixedly connected to the connecting rod assembly <NUM>.

A wireless remote control device <NUM> is further disposed on the handle device <NUM>. Therefore, the handle device <NUM> in this example is a wireless remote control handle device. In this example, the wireless remote control device <NUM> is disposed on the left or right of the operation member <NUM> or in the middle of the operation member <NUM> so as to facilitate the manipulation of the wireless remote control device <NUM> by the user. The wireless remote control device <NUM> may output control information to the control unit of the tool body <NUM> in a wireless communication manner, thereby controlling a working state of the tool body <NUM>. A communication manner of the wireless remote control device <NUM> may be optical communication such as infrared communication or ultraviolet communication or may be radio frequency communication, Bluetooth communication, ZigBee communication, or the like.

In an example, as shown in <FIG>, the wireless remote control device <NUM> may include a display module <NUM> for displaying a current working state of the mower <NUM>, such as a walking speed of the mower <NUM>, cutting strength of the cutting blade, or other state information.

In an example, the wireless remote control device <NUM> may also include an input module <NUM> such as an input key or a touch key for the user to input an operation instruction or view historical state information.

In an example, the wireless remote control device <NUM> includes a data sending module <NUM> for outputting the control information in the wireless communication manner. Accordingly, the tool body <NUM> also includes a data reception module (not shown) for receiving information sent by the data sending module <NUM>. Optionally, a position of the data sending module <NUM> and a position of the data reception module may be exchanged.

In this example, the wireless remote control device <NUM> is independently powered by a power supply module <NUM>. The power supply module <NUM> may be one or more of a detachable button cell, a rechargeable battery, a solar cell, and a power bank. For example, the button cell may be used for powering the wireless remote control device <NUM>, and the button cell whose capacity is more than <NUM> mAh may be selected. Multiple button cells may be provided, where the multiple button cells are built in the handle device <NUM> and connected in series or in parallel. The power supply module <NUM> may be detachably connected to the handle device <NUM> through a metal flat spring or a spring structure, may be detachably fixed on the handle device <NUM> through a screw, or may be detachably disposed on the handle device <NUM> through a peripheral power interface such as a typ-c interface. In an example, the power supply module <NUM> is the rechargeable battery, where a charging port of the rechargeable battery may be disposed on the handle device <NUM>.

In this example, the wireless remote control device <NUM> is powered by the power supply module <NUM> mounted to the handle device <NUM>. In this case, after the wireless remote control device <NUM> is detached from the handle device <NUM>, the power supply module <NUM> mounted to the handle device <NUM> is electrically disconnected from the wireless remote control device <NUM>, and the wireless remote control device <NUM> has no power supply. In this case, a communication connection between the wireless remote control device <NUM> and the tool body <NUM> is interrupted. This manner is conducive to preventing the wireless remote control device <NUM> from being lost.

In an example, the power supply module <NUM> may be a flexible solar cell such as a solar cell panel. The solar cell panel may absorb light energy and convert the light energy to electrical energy to power the wireless remote control device <NUM>. Optionally, the solar cell panel may be disposed on the connecting rod assembly <NUM> and/or the grip <NUM> and/or the housing <NUM>. Optionally, the solar cell panel may be disposed on the operation member <NUM> or may be disposed next to the wireless remote control device <NUM>. In summary, the solar cell panel needs to be capable of receiving enough light energy to power the wireless remote control device <NUM> and will not fail to power the wireless remote control device <NUM> despite a power decrease due to occasional occlusion by a hand. It is to be understood that as long as the solar cell panel is disposed on the handle device <NUM>, the solar cell panel may be connected to the wireless remote control device <NUM> through a relatively short electrical connecting wire even if the solar cell panel is a little distant from the wireless remote control device <NUM>. Since the electrical connecting wire is disposed between the solar cell panel and the wireless remote control device <NUM> and the distance therebetween is relatively short, an effect of the electrical connecting wire on the complexity of a circuit design is within an acceptable range.

In an example, a ratio of a coverage area of the solar cell panel on the handle device <NUM> to an area of the handle device <NUM> is <NUM>% to <NUM>%. It is to be understood that the solar cell panel may be split into several small panels disposed in different positions of the handle device <NUM> so that the small panels can obtain more adequate light, thereby ensuring the continuity and adequacy of the power supply. The several small solar cell panels may unify the electrical energy through electrical connections and then supply the electrical energy to the wireless remote control device <NUM>. The coverage area of the solar cell panel on the handle device <NUM> is set and the number of panels is not limited so that the solar cell panel is disposed with higher flexibility while adequate solar power supply is ensured. In addition, it is set that the coverage area of the solar cell panel occupies <NUM>% to <NUM>% of the area of the handle device <NUM>, which ensures that the solar cell panel is capable enough to obtain adequate light for powering the wireless remote control device <NUM> and also prevents an effect of the solar cell panel on an appearance of the handle device <NUM> or other structures of the handle device <NUM>. In an example, multiple solar cell panels disposed on the handle device <NUM> may separately power the wireless remote control device <NUM> so that when one solar cell panel fails or is damaged, other solar cell panels may be used for powering the wireless remote control device <NUM>. In an example, the solar cell panel may also be used for charging the rechargeable battery.

In this example, the mower <NUM> further includes an alarm module <NUM>, where when the wireless remote control device <NUM> outputs the control information, the alarm module <NUM> can send alarm prompt information to inform the user that a control instruction is successfully sent. Optionally, the alarm module <NUM> may be integrated in the wireless remote control device <NUM> or may be separately disposed in another position of the handle device <NUM>. The alarm module <NUM> may perform wireless communication with the wireless remote control device <NUM>, and a communication protocol between the alarm module <NUM> and the wireless remote control device <NUM> is different from or the same as a communication protocol between the wireless remote control device <NUM> and the tool body <NUM>. In an example, the alarm module <NUM> may provide a voice prompt, a flash prompt, a voice plus flash prompt, or other forms of prompts such as a buzz. In an example, the alarm module <NUM> may be powered independently or may be powered by the same power supply module <NUM> as the wireless remote control device <NUM>.

In this example, a safety control module <NUM> is also included. The safety control module <NUM> may be integrated in the wireless remote control device <NUM> or may be separately disposed in another position of the handle device <NUM>. The safety control module <NUM> may encrypt the control information output by the wireless remote control device <NUM>. It is to be understood that when outputting the control information, the wireless remote control device <NUM> may output an alarm instruction to the alarm module <NUM> to provide an alarm prompt so that the safety control module <NUM> encrypts different output information to prevent information crosstalk. Since different encryption manners are used for different wireless communication manners, the safety control module <NUM> may match an appropriate information encryption technology with the communication manner used by the wireless remote control device <NUM>.

In this example, the wireless remote control device <NUM> may perform wireless communication in real time or may perform wireless communication after waking up at a preset frequency, which can reduce the standby power consumption of a wireless communication module and improve the service life of the power supply module <NUM>.

In this example, the first connecting rod <NUM> and the second connecting rod <NUM> are collectively referred to as telescopic rods. The cutting blade on the chassis <NUM> of the mower <NUM> easily injures the user by mistake. Therefore, when the mower <NUM> is designed, the mower <NUM> is required to start mowing only when the telescopic rods are in a completely expanded state; and when the telescopic rods are in a completely retracted state or an intermediate state between the completely expanded state and the completely retracted state, the machine is not started or is controlled to stop working. As shown in <FIG>, a locking mechanism <NUM> is further disposed on the handle device <NUM>, where when the telescopic rods are in the completely expanded state or the completely retracted state, the locking mechanism <NUM> can lock the state, thereby preventing the telescopic rods from sliding. That is to say, when the telescopic rods are in the completely retracted state, the locking mechanism <NUM> is also in a locked state. Therefore, there is a potential safety hazard when the mower is controlled to start working only by determining the locked state of the locking mechanism <NUM>. To prevent this case, based on the locked state of the locking mechanism <NUM>, a safety control device needs to be provided to detect a telescopic state of a telescopic rod. The so-called telescopic state includes the completely expanded state of the telescopic rod, that is, the first connecting rod <NUM>, the completely retracted state of the telescopic rod, and the intermediate state of the telescopic rod between the preceding two states.

In an implementation, as shown in <FIG>, a pin <NUM> is disposed on the locking mechanism <NUM>. Accordingly, an insertion hole <NUM> is disposed on the first connecting rod <NUM>, where after the pin <NUM> is inserted into the insertion hole <NUM>, the connecting rod assembly <NUM> may be fixed in a connected state, and when the pin <NUM> is not inserted into the insertion hole <NUM>, the connecting rod assembly may slide freely. Optionally, the locking mechanism <NUM> may be other forms of fixing structures, which is not listed one by one here.

As shown in <FIG> and <FIG>, the first connecting rod <NUM>, that is, the telescopic rod, is in the completely retracted state. As shown in <FIG> and <FIG>, the first connecting rod <NUM> is in the completely expanded state. The intermediate state is between the preceding two states. Specifically, to detect the telescopic state of the telescopic rod, a first detection element <NUM> used for detecting the telescopic state of the telescopic rod and electrically connected to the wireless remote control device <NUM> is disposed on the operation member <NUM> of the handle device <NUM>. Accordingly, a second detection element <NUM> is disposed on the housing <NUM>. It is to be understood that the first detection element <NUM> and the operation member <NUM> constitute a first whole and move together, and the second detection element <NUM> and the connecting rod assembly <NUM> constitute a second whole and move together. Thus, a position of the second detection element <NUM> in a direction of the first straight line 11a remains unchanged along with the connecting rod assembly <NUM>, and the first detection element <NUM> moves along with the operation member <NUM> so that a distance between the first detection element <NUM> and the second detection element <NUM> is changed.

It is to be understood that the first detection element <NUM> may be completely disposed in a second accommodation cavity <NUM> formed by the operation member <NUM>, may be partially disposed in the second accommodation cavity <NUM>, or may be completely disposed on a surface of the first mounting portion <NUM> of the operation member <NUM> or a surface of the second mounting portion <NUM> of the operation member <NUM>. The second detection element <NUM> may be completely disposed in the first accommodation cavity <NUM> formed by the housing <NUM>, may be partially disposed in the first accommodation cavity <NUM>, or may be disposed on an outer surface of the housing <NUM>. Optionally, the first detection element <NUM> and the second detection element <NUM> may be disposed on a straight line parallel to the first straight line 11a or a straight line not parallel to the first straight line 11a.

In an example, the first detection element <NUM> and the second detection element <NUM> can sense each other. In addition, as the telescopic rod is continuously expanded, the distance between the first detection element <NUM> and the second detection element <NUM> continuously increases so that signals of the first detection element <NUM> and the second detection element <NUM> sensed by each other have gradually reduced strength. Therefore, the wireless remote control device <NUM> may determine the expanded state of the telescopic rod according to the magnitude of the strength of the signals sensed by the first detection element <NUM> and the second detection element <NUM>. For example, the first detection element <NUM> can sense an intermediate parameter representing the distance between the first detection element <NUM> and the second detection element <NUM> and then transmits the parameter to the wireless remote control device <NUM>. The wireless remote control device <NUM> determines the distance between the first detection element <NUM> and the second detection element <NUM> according to the acquired intermediate parameter and determines the telescopic state of the telescopic rod. Optionally, the first detection element <NUM> may directly determine the distance between the first detection element <NUM> and the second detection element <NUM> according to the sensed intermediate parameter, determine the telescopic state of the telescopic rod, and then transmit the telescopic state to the wireless remote control device <NUM>. When the telescopic rod is in the completely retracted state or the intermediate state, the wireless remote control device <NUM> controls a main control unit <NUM> of the tool body <NUM> to remain unstarted or controls the working assembly of the tool body <NUM> in the working state to stop working.

In an example, the first detection element <NUM> and the second detection element <NUM> may be any detection elements which can sense the distance therebetween mutually or unidirectionally. For example, the first detection element <NUM> and the second detection element <NUM> may mutually sense the distance between each other in such a manner as mutual magnetic induction, mutual optical induction, or mutual acoustic induction.

In an implementation, the first detection element <NUM> is a Hall device, and the second detection element <NUM> is a magnetic member or a magnetically conductive element. A Hall element can sense a magnitude of a magnetic flux between the Hall element and the magnetic member or the magnetically conductive element. It is to be noted that the larger a distance between the Hall element and the magnetic member or the magnetically conductive element, the smaller the magnetic flux sensed by the Hall element. When the magnetic flux sensed by the Hall element is smaller than or equal to a magnetic flux threshold, the first connecting rod <NUM> may be considered to be in the completely expanded state. When the magnetic flux is larger than the magnetic flux threshold, the first connecting rod <NUM> may be considered to be in the completely retracted state or the intermediate state. Thus, the wireless remote control device <NUM> may output a control signal to the main control unit <NUM> of the tool body <NUM> to control the working assembly on the tool body <NUM> to stop working or not to start when the magnetic flux is larger than the magnetic flux threshold and to start working when the magnetic flux is smaller than or equal to the magnetic flux threshold.

It is to be understood that when the wireless remote control device <NUM> determines, according to the magnitude of the obtained magnetic flux, that the telescopic rod is in the completely expanded state, the locking mechanism <NUM> is also in the locked state. That is to say, the first connecting rod <NUM> and the second connecting rod <NUM> are in a completely expanded and fixed state, and the mower <NUM> may start mowing.

In an example, the magnetic member or the magnetically conductive element may have an arbitrary shape. The Hall device may be disposed on a surface of an operation element, and the magnetic member or the magnetically conductive element may be disposed on the surface of the housing <NUM>. Thus, an effect of the housing <NUM> on the strength of a magnetic field or the magnitude of the magnetic flux can be reduced.

In an example, the first detection element <NUM> or the second detection element <NUM> may be a switch element having only two determinate states. For example, the first detection element <NUM> may be a switch element having a first switch state and a second switch state. The second detection element <NUM> is a triggering element for triggering the switch element to switch a switch state of the switch element. Specifically, when the first connecting rod <NUM> is in the completely expanded state or the intermediate state, the switch element is not in contact with the triggering element, and the switch element is in the first switch state; and when the first connecting rod <NUM> is in the completely retracted state, the switch element is in contact with the triggering element, and the switch element is in the second switch state. In particular, if the triggering element is relatively long or a position of the triggering element is changed, the switch element is in the second switch state and the first connecting rod <NUM> may still be in the intermediate state when the triggering element is in contact with the switch element. The first switch state may be an off state, and the second switch state may be an on state. That is to say, when the switch element is in the on state, the first connecting rod <NUM> is in the completely retracted state or the intermediate state. Therefore, the wireless remote control device <NUM> may determine the telescopic state of the telescopic rod by detecting the state of the switch element. Further, when the switch element is in the first switch state, that is, the off state, it may be determined that the telescopic rod is in the completely expanded state or the intermediate state, and in conjunction with the locked state of the locking mechanism <NUM>, the working assembly of the tool body <NUM> is controlled to work; and when the switch element is in the second switch state, that is, the on state, it may be determined that the telescopic rod is in the completely retracted state or the intermediate state, and the working assembly of the tool body <NUM> may be directly controlled to stop working or not to start.

In this example, detection elements are disposed on the operation member <NUM> of the mower <NUM> and the housing <NUM> of the mower <NUM> separately to detect the telescopic state of the telescopic rod, which prevents complex connecting wires and ensures the accuracy with which the state of the telescopic rod is determined. In addition, in conjunction with the locking mechanism <NUM>, the mower <NUM> is controlled to start, thereby improving the control safety of the mower <NUM>.

In this example, as shown in <FIG>, a pressure sensor 19a may also be disposed on the handle device <NUM> of the mower <NUM> and is used for sensing the thrust applied by the user to the handle device <NUM> to drive the mower <NUM> to walk. The pressure sensor 19a is electrically connected to the wireless remote control device <NUM> and may output an electrical signal to the wireless remote control device <NUM> so that the wireless remote control device <NUM> outputs the control signal to the tool body <NUM> according to the electrical signal output by the pressure sensor 19a to change a walking speed of the mower <NUM>.

In an example, the pressure sensor 19a is a resistance strain sensor. In other examples, the pressure sensor 19a may be a piezoelectric film sensor or a ceramic sensor. A triggering component 19b is also disposed on the handle device <NUM>. When the thrust is applied to the grip <NUM>, the triggering component 19b can apply a force to the pressure sensor 19a and drive the pressure sensor 19a to deform. Thus, when the user applies the thrust to the grip <NUM>, the triggering component 19b applies the force to the pressure sensor 19a, and the pressure sensor 19a deforms and generates the electrical signal. Further, the pressure sensor 19a outputs the electrical signal to the wireless remote control device <NUM>. Optionally, the wireless remote control device <NUM> may directly transmit, in the wireless communication manner, the electrical signal output by the pressure sensor 19a to the tool body <NUM>, and the tool body <NUM> performs a calculation and then controls, according to the calculation, the drive motor <NUM> to change a rotational speed. Optionally, the wireless remote control device <NUM> may directly determine, according to the electrical signal output by the pressure sensor 19a, a control signal for controlling the rotational speed of the drive motor <NUM> and may transmit the control signal to the tool body <NUM> to control the motor to change the rotational speed. It is to be understood that when the user walks at an increasing speed, the thrust applied by the user to the handle device <NUM> increases and the wireless remote control device <NUM> controls a forward speed of the mower to increase. Similarly, when the user walks at a decreasing speed, the thrust applied by the user to the handle device <NUM> decreases and the wireless remote control device <NUM> controls the forward speed of the mower to decrease. Thus, the forward speed of the mower is adapted to a walking speed of the user, and the user will not be pulled by the mower to run, thereby improving the user's comfort.

<FIG> shows another handle device <NUM> adaptable to the tool body <NUM> in <FIG>, where the handle device <NUM> is configured to be connectable to the tool body <NUM> in <FIG>. The handle device <NUM> includes an operation member <NUM> and a connecting rod assembly <NUM>, where the operation member <NUM> includes a grip <NUM> for the user to hold and the connecting rod assembly <NUM> is used for connecting the operation member <NUM> to the tool body <NUM>.

As shown in <FIG>, the operation member <NUM> further includes a trigger <NUM> and a mounting housing <NUM>, where the trigger <NUM> is rotatably connected to the mounting housing <NUM> and used for controlling the running of a control unit <NUM>, and the mounting housing <NUM> is used for mounting the trigger <NUM> and connecting the operation member <NUM> to the connecting rod assembly <NUM>.

The connecting rod assembly <NUM> includes a first connecting rod <NUM> connecting the operation member <NUM> to the tool body <NUM> and extending along a direction of a first straight line 31a. The first connecting rod <NUM> includes a first upper rod portion 321a and a first lower rod portion <NUM> b, where a first end 321c of the first upper rod portion 321a is connected to the operation member <NUM>, a second end 321d of the first upper rod portion 321a is connected to the first lower rod portion 321b, and the first lower rod portion 321b is further connected to the tool body <NUM>. The first upper rod portion 321a is slidable relative to the first lower rod portion 321b along the first straight line 31a to a retracted position in <FIG> and an expanded position in <FIG>. When the first upper rod portion 321a slides to the retracted position in <FIG>, a dimension of the handle device <NUM> along the direction of the first straight line 31a becomes smaller, and in this case, the handle device <NUM> is in the retracted state. When the first upper rod portion 321a slides to the expanded state in <FIG>, the dimension of the handle device <NUM> along the direction of the first straight line 31a becomes larger, and in this case, the handle device <NUM> is in the expanded state. In this example, the retracted position refers to a position to which the first upper rod portion 321a slides so that the handle device <NUM> has a minimum dimension along the direction of the first straight line 31a, and the expanded position refers to a position to which the first upper rod portion 321a slides so that the handle device <NUM> has a maximum dimension along the direction of the first straight line 31a. Of course, it is to be understood that in other examples, the handle device <NUM> may be in another state, that is, the intermediate state between the retracted state and the expanded state. When the handle device <NUM> is in the intermediate state, the dimension of the handle device <NUM> along the direction of the first straight line 31a is between the minimum dimension of the handle device <NUM> and the maximum dimension of the handle device <NUM>.

In this example, the handle device <NUM> further includes a control device <NUM> electrically or communicatively connected to the control unit <NUM> in the tool body <NUM>. The control unit <NUM> includes the cutting motor <NUM> and the drive motor <NUM>. The control device <NUM> can control the running of the control unit <NUM>, for example, the running of the cutting motor <NUM> or the running of the drive motor <NUM>. In some examples, the control device <NUM> may control the cutting motor <NUM> to start or not, and the control device <NUM> may also control the drive motor <NUM> to start or not. In some examples, the control device <NUM> may control the rotational speed of the drive motor <NUM> or a rotational speed of the cutting motor <NUM>. In some examples, the control device <NUM> may control a working mode of the drive motor <NUM> or a working mode of the cutting motor <NUM>.

In this example, the control device <NUM> is mounted to the operation member <NUM> so that the trigger <NUM> and other electronic elements in the operation member <NUM> can be connected to the control device <NUM> and can transmit signals to the tool body <NUM> through the control device <NUM>. The trigger <NUM> and the other electronic elements are connected to the control device <NUM> so that the control unit <NUM> or other electric devices in the tool body <NUM> are controlled through the control device <NUM> to work. For example, a safety switch <NUM> in the operation member <NUM> is electrically connected to the control device <NUM>, and a speed regulation device in the operation member <NUM> is electrically connected to the control device <NUM>.

The handle device <NUM> further includes a detection device <NUM> including a first detection element <NUM> for detecting a telescopic state of the handle device <NUM>. The first detection element <NUM> can detect that the handle device <NUM> is in the retracted state or the expanded state, and the first detection element <NUM> is also electrically or communicatively connected to the control device <NUM>. In this manner, the first detection element <NUM> can send detection information to the control device <NUM>, and the control device <NUM> controls the control unit <NUM> according to the detection information from the first detection element <NUM>. In this example, the first detection element <NUM> is electrically or communicatively connected to the control device <NUM> mounted in the handle device <NUM> so that information can be transmitted from the first detection element <NUM> to the control device <NUM> and the control unit <NUM> is controlled by the control device <NUM>. Thus, on the one hand, electrical connection relationships in the mower can be reduced, which is conducive to reducing a cost and improving the reliability of information transmission; and on the other hand, the modular design of the handle device <NUM> is facilitated so that the handle device <NUM> is adaptable to more types of tool body <NUM>. That is to say, the handle device <NUM> is also adaptable to a tool body <NUM> having other functions so that the hand-pushed power tool having the handle device <NUM> implements more functions. For example, the hand-pushed power tool may be a snow thrower, and the handle device <NUM> may be mounted to a body of the snow thrower to implement a snow removal function.

The control device <NUM> is configured to control the running of the cutting motor <NUM> according to the detection information from the first detection element <NUM>. When the first detection element <NUM> detects that the handle device <NUM> is in the retracted state, the control device <NUM> controls the cutting motor <NUM> to be incapable of being started. In this manner, the cutting motor <NUM> is not started even if the user operates the trigger <NUM> and/or the safety switch <NUM> by mistake, thereby ensuring the safety of the user. When the first detection element <NUM> detects that the handle device <NUM> is in the expanded state, the control device <NUM> allows the cutting motor <NUM> to be started. As shown in <FIG> and <FIG>, the handle device <NUM> further includes a locking device <NUM> for locking the slide of the first upper rod portion 321a relative to the first lower rod portion 321b. When the handle device <NUM> is out of the retracted position and the locking device <NUM> does not lock the first upper rod portion 321a, the user generally does not trigger the trigger <NUM> and the safety switch <NUM>, and the cutting motor <NUM> is generally not started. It is to be understood that when the handle device <NUM> is in the intermediate state, the control device <NUM> may control, according to the detection information from the first detection element <NUM>, the cutting motor <NUM> to be capable of being started or be incapable of being started. For example, the first detection element <NUM> detects a parameter value, and the parameter value may be compared with a preset parameter value. When the parameter value reaches the preset parameter value, the control device <NUM> controls the cutting motor <NUM> to be incapable of being started. In this manner, when the handle device <NUM> is in the retracted state or the intermediate state, the control device <NUM> may control the cutting motor <NUM> to be incapable of being started. In this example, when the parameter value is increased to the preset parameter value, the control device <NUM> controls the cutting motor <NUM> to be incapable of being started. In other examples, when the parameter value is reduced to the preset parameter value, the control device <NUM> controls the cutting motor <NUM> to be incapable of being started.

In some examples, the control device <NUM> is configured to control the running of the drive motor <NUM> according to the detection information from the first detection element <NUM>. When the first detection element <NUM> detects that the handle device <NUM> is in the retracted state, the control device <NUM> controls the drive motor <NUM> to be incapable of being started. When the first detection element <NUM> detects that the handle device <NUM> is in the expanded state, the control device <NUM> controls the drive motor <NUM> to be capable of being started.

In some examples, the control device <NUM> is configured to control the running of the drive motor <NUM> and the running of the cutting motor <NUM> according to the detection information from the first detection element <NUM>. When the first detection detects that the handle device <NUM> is in the retracted state, the control device <NUM> controls the drive motor <NUM> and the cutting motor <NUM> to be incapable of being started. When the first detection element <NUM> detects that the handle device <NUM> is in the expanded state, the control device <NUM> controls the drive motor <NUM> and the cutting motor <NUM> to be capable of being started.

As shown in <FIG>, the first detection element <NUM> is mounted to the operation member <NUM> or the first upper rod portion 321a. In this example, the first detection element <NUM> is mounted to the operation member <NUM>. The first detection element <NUM> is electrically connected to the control device <NUM> through a first connecting wire <NUM>. The first detection element <NUM> is mounted to the operation member <NUM>, which can make the first connecting wire <NUM> connected to the control device <NUM> relatively short and the arrangement of the first connecting wire <NUM> relatively simple.

Specifically, the mounting housing <NUM> of the operation member <NUM> is formed with a first accommodation cavity 313a. The control device <NUM> is disposed in the first accommodation cavity 313a, the first detection element <NUM> is mounted to the mounting housing <NUM>, and the first detection element <NUM> is at least partially disposed in the first accommodation cavity 313a so that the first connecting wire <NUM> is disposed in the first accommodation cavity 313a and a first connector can be configured to be the shortest. The reliability of the detection device <NUM> and the control device <NUM> is also improved. In this example, the first detection element <NUM> is disposed at an end of the mounting housing <NUM> close to the first connecting rod <NUM>.

The first detection element <NUM> is a Hall sensor electrically connected to the control device <NUM> through the first connecting wire <NUM> and at least partially disposed in the first accommodation cavity 313a. The detection device <NUM> further includes a second detection element <NUM> cooperating with the first detection element <NUM>, and the second detection element <NUM> is the magnetic member or the magnetically conductive element cooperating with the Hall sensor. The second detection element <NUM> is fixed relative to the first lower rod portion 321b. The second detection element <NUM> may be mounted to the first lower rod portion 321b or mounted in a housing fixedly connected to the first lower rod portion 321b.

Specifically, the handle device <NUM> further includes a connection housing <NUM> fixedly connected to the first lower rod portion 321b, and the second detection element <NUM> is mounted to the connection housing <NUM>.

In this example, the connecting rod assembly <NUM> further includes a second connecting rod <NUM> connecting the operation member <NUM> to the tool body <NUM>, and the second connecting rod <NUM> and the first connecting rod <NUM> are disposed at two opposite ends of the operation member <NUM>. The second connecting rod <NUM> extends along a direction of a second straight line 31b parallel to the first straight line 31a. The second connecting rod <NUM> includes a second upper rod portion 322a and a second lower rod portion 322b, where the second upper rod portion 322a is connected to the operation member <NUM>, and the second lower rod portion is connected to the tool body <NUM>. The second upper rod portion 322a is slidable relative to the second lower rod portion 322b to a retracted position and an expanded position.

The handle device <NUM> further includes a second connecting wire <NUM> connecting the control device <NUM> to the control unit <NUM>. In this example, one end of the second connecting wire <NUM> is disposed in the first accommodation cavity 313a and connected to the control device <NUM>, and the other end of the second connecting wire <NUM> is disposed in the tool body <NUM> and connected to the control unit <NUM>. The first connecting rod <NUM> is a hollow tube, and the second connecting wire <NUM> passes through the first connecting rod <NUM>.

The control device <NUM> includes a circuit board <NUM>, where the first connecting wire <NUM> and the second connecting wire <NUM> are both connected to the circuit board <NUM>, and the circuit board <NUM> is accommodated in the first accommodation cavity 313a.

The second connecting rod <NUM> is also a hollow tube. In other examples, the second connecting wire <NUM> may pass through the second connecting rod <NUM>.

The connection housing <NUM> connects the first connecting rod <NUM> to the second connecting rod <NUM>, and the locking device <NUM> is mounted to the connection housing <NUM>. The second detection element <NUM> is mounted to the connection housing <NUM>. The second detection element <NUM> is the magnetic member at least partially disposed in the connection housing <NUM>.

In this example, the handle device <NUM> may also include a pressure sensor <NUM> having the same structure as the pressure sensor 19a in <FIG>, which is not described in detail.

<FIG> shows another handle device <NUM> adaptable to the tool body <NUM> in <FIG>, where the handle device <NUM> is configured to be connectable to the tool body <NUM> in <FIG>. The handle device <NUM> includes an operation member <NUM> and a connecting rod assembly <NUM>. The operation member <NUM> includes a grip <NUM> for the user to hold. The connecting rod assembly <NUM> is used for connecting the operation member <NUM> to the tool body <NUM>.

As shown in <FIG>, the operation member <NUM> further includes a trigger <NUM> and a mounting housing <NUM>, where the trigger <NUM> is rotatably connected to the mounting housing <NUM> and used for controlling the running of the control unit <NUM>, and the mounting housing <NUM> is used for mounting the trigger <NUM> and connecting the operation member <NUM> to the connecting rod assembly <NUM>.

The connecting rod assembly <NUM> includes a first connecting rod <NUM> connecting the operation member <NUM> to the tool body <NUM> and extending along a direction of a first straight line 41a. The first connecting rod <NUM> includes a first upper rod portion 421a and a first lower rod portion 421b, where a first end 421c of the first upper rod portion 421a is connected to the operation member <NUM>, a second end 421d of the first upper rod portion 421a is connected to the first lower rod portion 421b, and the first lower rod portion 421b is further connected to the tool body <NUM>. The first upper rod portion 421a is slidable relative to the first lower rod portion 421b along the first straight line 41a to a retracted position shown in <FIG> and an expanded position shown in <FIG>. When the first upper rod portion 421a slides to the retracted position, a dimension of the handle device <NUM> along the direction of the first straight line 41a becomes smaller, and in this case, the handle device <NUM> is in the retracted state. When the first upper rod portion 421a slides to the expanded state, the dimension of the handle device <NUM> along the direction of the first straight line 41a becomes larger, and in this case, the handle device <NUM> is in the expanded state. In this example, the retracted position refers to a position to which the first upper rod portion 421a slides so that the handle device <NUM> has a minimum dimension along the direction of the first straight line 41a, and the expanded position refers to a position to which the first upper rod portion 421a slides so that the handle device <NUM> has a maximum dimension along the direction of the first straight line 41a. Of course, it is to be understood that in other examples, the handle device <NUM> may be in another state, that is, the intermediate state between the retracted state and the expanded state. When the handle device <NUM> is in the intermediate state, the dimension of the handle device <NUM> along the direction of the first straight line 41a is between the minimum dimension of the handle device <NUM> and the maximum dimension of the handle device <NUM>.

In this example, the handle device <NUM> further includes a control device <NUM> electrically or communicatively connected to the control unit <NUM> in the tool body <NUM>. The control unit <NUM> includes the cutting motor <NUM> and the drive motor <NUM>. The control device <NUM> can control the running of the control unit <NUM>, for example, the running of the cutting motor <NUM> or the running of the drive motor <NUM>. In some examples, the control device <NUM> may control the cutting motor <NUM> to start or not, or the control device <NUM> may control the drive motor <NUM> to start or not. In some examples, the control device <NUM> may control the rotational speed of the drive motor <NUM> or the rotational speed of the cutting motor <NUM>. In some examples, the control device <NUM> may control the working mode of the drive motor <NUM> or the working mode of the cutting motor <NUM>.

In this example, the control device <NUM> is mounted to the operation member <NUM> so that the trigger <NUM> and other electronic elements in the operation member <NUM> can be connected to the control device <NUM> and can transmit signals to the tool body <NUM> through the control device <NUM>. The trigger <NUM> and the other electronic elements are connected to the control device <NUM> so that the control unit <NUM> or the other electric devices in the tool body <NUM> are controlled through the control device <NUM> to work. For example, a safety switch <NUM> in the operation member <NUM> is electrically connected to the control device <NUM>, and a speed regulation device in the operation member <NUM> is electrically connected to the control device <NUM>.

The handle device <NUM> further includes a detection device <NUM> including a first detection element <NUM> for detecting a telescopic state of the handle device <NUM>. The first detection element <NUM> can detect that the handle device <NUM> is in the retracted state or the expanded state, and the first detection element <NUM> is also electrically or communicatively connected to the control device <NUM>. In this manner, the first detection element <NUM> can send detection information to the control device <NUM>, and the control device <NUM> controls the control unit <NUM> according to the detection information from the first detection element <NUM>. In this example, the first detection element <NUM> is electrically or communicatively connected to the control device <NUM> mounted in the handle device <NUM> so that information can be transmitted from the first detection element <NUM> to the control device <NUM> and the control unit <NUM> is controlled by the control device <NUM>. Thus, on the one hand, the electrical connection relationships in the mower can be reduced, which is conducive to reducing the cost and improving the reliability of information transmission; and on the other hand, the modular design of the handle device <NUM> is facilitated so that the handle device <NUM> is adaptable to more types of tool body <NUM>. That is to say, the handle device <NUM> is also adaptable to the tool body <NUM> having the other functions so that the hand-pushed power tool having the handle device <NUM> implements more functions. For example, the hand-pushed power tool may be the snow thrower, and the handle device <NUM> may be mounted to the body of the snow thrower to implement the snow removal function.

The control device <NUM> is configured to control the running of the cutting motor <NUM> according to the detection information from the first detection element <NUM>. When the first detection element <NUM> detects that the handle device <NUM> is in the retracted state, the control device <NUM> controls the cutting motor <NUM> to be incapable of being started. In this manner, the cutting motor <NUM> is not started even if the user operates the trigger <NUM> and/or the safety switch <NUM> by mistake, thereby ensuring the safety of the user. When the first detection element <NUM> detects that the handle device <NUM> is in the expanded state, the control device <NUM> allows the cutting motor <NUM> to be started. When the handle device <NUM> is in the intermediate state, the control device <NUM> controls the cutting motor <NUM> to be incapable of being started. Alternatively, in other examples, when the handle device <NUM> is in the intermediate state and locked in the intermediate state, the control device <NUM> controls the cutting motor <NUM> to be capable of being started. For example, the first detection element <NUM> detects a parameter value, and the parameter value may be compared with a preset parameter value. When the parameter value does not reach the preset parameter value, the control device <NUM> controls the cutting motor <NUM> to be incapable of being started. In this manner, when the handle device <NUM> is in the retracted state or the intermediate state, the control device <NUM> may control the cutting motor <NUM> to be incapable of being started. In this example, when the parameter value is increased to the preset parameter value, the control device <NUM> controls the cutting motor <NUM> to be capable of being started. In other examples, when the parameter value is reduced to the preset parameter value, the control device <NUM> controls the cutting motor <NUM> to be incapable of being started.

In this example, the first detection element <NUM> is mounted to the first upper rod portion 421a. The first detection element <NUM> is electrically connected to the control device <NUM> through a first connecting wire <NUM>. The first detection element <NUM> is mounted to the first upper rod portion 421a, which can make the first connecting wire <NUM> connected to the control device <NUM> relatively long and the arrangement of the first connecting wire <NUM> relatively simple.

Specifically, the mounting housing <NUM> of the operation member <NUM> is formed with a first accommodation cavity 413a in which the control device <NUM> is disposed. The first connecting rod <NUM> is a tube, and the first detection element <NUM> is mounted to the second end 421d of the first upper rod portion 421a close to the first lower rod portion 421b. A mounting member 421d is disposed at the second end 421d, and the first detection member <NUM> is mounted to the mounting member 421d. The first detection element <NUM> may be at least partially disposed in the first upper rod portion 421a. The first connecting wire <NUM> passes through the first upper rod portion 421a to connect the first detection element <NUM> to the control device <NUM>.

In this example, the handle device <NUM> further includes a second connecting rod <NUM> connecting the operation member <NUM> to the tool body <NUM>, and the second connecting rod <NUM> and the first connecting rod <NUM> are disposed at two opposite ends of the operation member <NUM>. The second connecting rod <NUM> extends along a direction of a second straight line 41b parallel to the first straight line 41a. The second connecting rod <NUM> includes a second upper rod portion 422a and a second lower rod portion 422b, where the second upper rod portion 422a is connected to the operation member <NUM>, and the second lower rod portion 422b is connected to the tool body <NUM>. The second upper rod portion 422a is slidable relative to the second lower rod portion 422b to a retracted position and an expanded position.

The handle device <NUM> further includes a second connecting wire <NUM> connecting the control device <NUM> to the control unit <NUM>. In this example, one end of the second connecting wire <NUM> is disposed in the first accommodation cavity 413a and connected to the control device <NUM>, and the other end of the second connecting wire <NUM> is disposed in the tool body <NUM> and connected to the control unit <NUM>. The second connecting rod <NUM> is a hollow tube, and the second connecting wire <NUM> passes through the second connecting rod <NUM>. Thus, the first connecting wire <NUM> is disposed in the first connecting rod <NUM>, and the second connecting wire <NUM> is disposed in the second connecting rod <NUM> so that the first connecting wire <NUM> and the second connecting wire <NUM> can be better arranged.

The control device <NUM> includes a circuit board <NUM>, where the first connecting wire <NUM> and the second connecting wire <NUM> are both connected to the circuit board <NUM>, and the circuit board <NUM> is accommodated in the first accommodation cavity 413a.

Of course, it is to be understood that in other examples, the second connecting wire <NUM> may pass through the first connecting rod <NUM>.

In this example, the first detection element <NUM> is the switch element, specifically, the Hall sensor. The Hall sensor is electrically connected to the control device <NUM> through the first connecting wire <NUM> and at least partially disposed in the first connecting rod <NUM>. The detection device <NUM> further includes a second detection element <NUM> cooperating with the first detection element <NUM>, and the second detection element <NUM> is a triggering member cooperation with the switch element. Specifically, the second detection element <NUM> is the magnetic member or the magnetically conductive element cooperating with the Hall sensor. The second detection element <NUM> is fixed relative to the first lower rod portion 421b. The second detection element <NUM> may be mounted to the first lower rod portion 421b or mounted in a housing fixedly connected to the first lower rod portion 421b. In this example, the handle device <NUM> further includes a connection housing <NUM> fixedly connected to the first lower rod portion 421b, and the second detection element <NUM> is mounted to the connection housing <NUM>. The connection housing <NUM> connects the first connecting rod <NUM> to the second connecting rod <NUM>, the handle device <NUM> includes a locking device <NUM> for locking the first connecting rod <NUM>, and the locking device <NUM> is mounted to the connection housing <NUM>. The second detection element <NUM> is mounted to the connection housing <NUM>. The second detection element <NUM> is the magnetic member at least partially disposed in the connection housing <NUM>.

It is to be understood that in other examples, the first detection element <NUM> may be another switch element. As shown in <FIG> and <FIG>, the switch element is a contact switch <NUM> including a switch 51a disposed in the first upper rod portion 421a and a triggered member <NUM> b connected to the switch 51a. The second detection element <NUM> is the triggering member mounted to the first lower rod portion 421b or the connection housing <NUM>. Specifically, the triggering member may be an inner wall 421f of the first lower rod portion 421b. The first lower rod portion 421b is further formed with a hole 421e. When the handle device <NUM> is in the expanded state, as shown in <FIG>, the first upper rod portion 421a slides to a position where the triggered member 51b corresponds to the hole 421e, the hole 421e releases the triggered member 51b, the contact switch <NUM> is in the off state, the detection device <NUM> detects that the handle device <NUM> is in the expanded state, and the control device <NUM> allows the cutting motor <NUM> to be started. When the handle device <NUM> is in the retracted state, as shown in <FIG>, the first upper rod portion 421a slides to a position where the triggered member 51b does not correspond to the hole 421e, the inner wall 421f of the first lower rod portion 421b does not release the triggered member 51b, the contact switch <NUM> is in the on state, the detection device <NUM> detects that the handle device <NUM> is in the retracted state, and the control device <NUM> prevents the cutting motor <NUM> from being started. Similarly, when the handle device <NUM> is in the intermediate state, the triggered member <NUM> b does not correspond to the hole 421e, the contact switch <NUM> is in the on state, and the control device <NUM> prevents the cutting motor <NUM> from being started.

Claim 1:
A hand-pushed power tool (<NUM>), comprising:
a tool body (<NUM>) comprising a working assembly and a control unit (<NUM>) for controlling running of the working assembly; and
a handle device (<NUM>, <NUM>, <NUM>) connected to the tool body;
wherein the handle device comprises:
an operation member (<NUM>, <NUM>, <NUM>) comprising a grip (<NUM>, <NUM>, <NUM>) for a user to hold;
a connecting rod assembly (<NUM>, <NUM>, <NUM>) comprising a first connecting rod (<NUM>, <NUM>, <NUM>) connected to the tool body, wherein the first connecting rod comprises a first lower rod portion (321b, 421b) and a first upper rod portion (321a, 421a), the first lower rod portion is connected to the tool body, the first upper rod portion is connected to the operation member and slidable relative to the first lower rod portion along a first straight line (11a, 31a, 41a) to a retracted position and an expanded position, the handle device is in a retracted state when the first upper rod portion is in the retracted position, and the handle device is in an expanded state when the first upper rod portion is in the expanded position;
a detection device (<NUM>, <NUM>) comprising a first detection element (<NUM>, <NUM>, <NUM>) for detecting a telescopic state of the handle device;
a control device (<NUM>) mounted to the operation member and electrically or communicatively connected to the first detection element;
wherein the control device is configured to control the control unit according to detection information from the first detection element; characterized in that
the handle device further comprises a second connecting rod (<NUM>, <NUM>, <NUM>) connecting the operation member to the tool body and a connection housing (<NUM>, <NUM>) connecting the first connecting rod to the second connecting rod, the detection device further comprises a second detection element (<NUM>, <NUM>, <NUM>), the first detection element is a Hall sensor, the second detection element is a magnetic member or a magnetically conductive element cooperating with the Hall sensor, and the second detection element is at least partially disposed in the connection housing.