Electric tool

Abstract

The utility model provides an electric tool which comprises a main body, a connecting assembly, a main control module and a user control module, the user control module comprises a first control unit, and the main control module comprises a second control unit; the infrared communication module comprises a first infrared receiving and transmitting unit and a second infrared receiving and transmitting unit, the first infrared receiving and transmitting unit is in electric signal connection with the first control unit, and the second infrared receiving and transmitting unit is in electric signal connection with the second control unit; when the connecting assembly is in the unfolded state, the first infrared receiving and transmitting unit and the second infrared receiving and transmitting unit can be aligned with each other and establish a wireless communication link, and control signals are transmitted between the user control module and the main control module through the wireless communication link. According to the electric tool, the use of wire harnesses can be reduced, the cost of the wire harnesses is saved, the assembly difficulty is reduced, and the safety and reliability of use and the aesthetic property of equipment are improved.

Description

Technical Field

[0001] This utility model relates to the field of power tool structure technology, and in particular to a power tool. Background Technology

[0002] Currently, the control module of a lawnmower with self-propelled function mainly consists of two parts: the main control module and the user control module (i.e., the control panel). The user control module is used for user operation. The user control module can communicate with the main control module to control the operation of the lawnmower's walking drive motor and mowing motor through the main control module, thereby realizing the lawnmower's self-propelled function and mowing function.

[0003] Currently, the main control module is generally located on the main body of the lawnmower, while the user control module is located on the connecting components of the lawnmower. The user control module and the main control module are connected by wires via a wiring harness to enable communication between the two and to supply power to the user control module. This wired connection method increases the cost and assembly difficulty of the equipment to some extent. At the same time, during the use of the equipment, as the connecting components fold and expand, the wiring harness is at risk of aging and breaking, affecting the safety and reliability of use. Moreover, the exposed wiring harness also affects the aesthetics of the equipment. Utility Model Content

[0004] The purpose of this invention is to provide an electric tool in which the user control module and the main control module communicate wirelessly via an infrared communication module, thereby reducing the use of wiring harnesses, saving wiring harness costs, reducing assembly difficulty, and improving the safety, reliability, and aesthetics of the equipment.

[0005] This utility model provides an electric tool, including a main body, a connecting assembly rotatably connected to the main body, a main control module disposed on the main body, and a user control module disposed on the connecting assembly. The user control module includes a first control unit, and the main control module includes a second control unit. When the connecting assembly rotates relative to the main body, the connecting assembly has a folded state and an unfolded state. The electric tool also includes an infrared communication module, which includes a first infrared transceiver unit and a second infrared transceiver unit. The first infrared transceiver unit is electrically connected to the first control unit, and the second infrared transceiver unit is electrically connected to the second control unit. The first infrared transceiver unit is disposed on the connecting assembly, and the second infrared transceiver unit is disposed on the main body or the connecting assembly.

[0006] When the connecting component is in the deployed state, the angle between the connecting component and the main body is greater than 90° and less than 180°. The first infrared transceiver unit and the second infrared transceiver unit are both located on the plane of the connecting component, so that the first infrared transceiver unit can be aligned with the second infrared transceiver unit and establish a wireless communication link. The user control module and the main control module transmit control signals through the wireless communication link.

[0007] In one possible implementation, the second infrared transceiver unit is disposed on the connecting assembly; when the connecting assembly rotates relative to the main body, both the first and second infrared transceiver units remain on the plane of the connecting assembly.

[0008] In one possible implementation, the connection assembly includes a lower push rod and an upper push rod, one end of the lower push rod being rotatably connected to the main body, and the other end of the lower push rod being retractably connected to one end of the upper push rod, the user control module being mounted on the end of the upper push rod away from the lower push rod, and the first infrared transceiver unit being disposed on the user control module;

[0009] A telescopic control component is provided at the connection between the lower push rod and the upper push rod. The telescopic control component is used to control the relative telescopic movement of the upper push rod and the lower push rod. The second infrared transceiver unit is disposed on the telescopic control component.

[0010] In one possible implementation, the line connecting the first infrared transceiver unit and the second infrared transceiver unit is parallel to the extension direction of the push rod.

[0011] In one possible implementation, the first infrared transceiver unit is disposed on the side of the user control module facing the telescopic control component, and the second infrared transceiver unit is disposed on the side of the telescopic control component facing the user control module.

[0012] In one possible implementation, the second infrared transceiver unit and the second control unit are connected by a cable electrical signal connection, the cable being routed through the lower push rod.

[0013] In one possible implementation, the main body is provided with a walking component for supporting the main body, a walking drive motor for driving the walking component to rotate, a workpiece for performing tasks, and a work drive motor for driving the workpiece to rotate. The second control unit is electrically connected to the walking drive motor and the work drive motor respectively. The infrared communication module further includes a third infrared transceiver unit, which is electrically connected to the second control unit and is disposed on the main body.

[0014] When the connection component is in the deployed state, the first infrared transceiver unit can establish a wireless communication link with the third infrared transceiver unit. At this time, the second control unit controls the walking drive motor and the working drive motor to be in the first mode. When the first infrared transceiver unit cannot establish a wireless communication link with the third infrared transceiver unit, the second control unit controls the walking drive motor and the working drive motor to be in the second mode.

[0015] In one possible implementation, the infrared communication module further includes a fourth infrared transceiver unit, which is electrically connected to the second control unit and is disposed on the main body; when the connection component is in a folded state, the fourth infrared transceiver unit can establish a wireless communication link with the first infrared transceiver unit and / or the second infrared transceiver unit.

[0016] In one possible implementation, the second infrared transceiver unit is disposed on the main body; the main body is provided with a walking component for supporting the main body, a walking drive motor for driving the walking component to rotate, a workpiece for performing operations, and a work drive motor for driving the workpiece to operate, and the second control unit is electrically connected to the walking drive motor and the work drive motor respectively.

[0017] When the connection component is in the deployed state, the first infrared transceiver unit can establish a wireless communication link with the second infrared transceiver unit, and the second control unit controls the walking drive motor and the working drive motor to be in a first mode; when the first infrared transceiver unit cannot establish a wireless communication link with the second infrared transceiver unit, the second control unit controls the walking drive motor and the working drive motor to be in a second mode.

[0018] In one possible implementation, the infrared communication module further includes a fourth infrared transceiver unit, which is electrically connected to the second control unit and is disposed on the main body; when the connection component is in a folded state, the fourth infrared transceiver unit can establish a wireless communication link with the first infrared transceiver unit.

[0019] In one feasible manner, the power tool is a lawnmower or a snowplow.

[0020] The power tool provided by this utility model, by setting an infrared communication module, enables wireless communication between the user control module and the main control module, thereby reducing the use of wire harnesses, saving wire harness costs, reducing assembly difficulty, eliminating the risks inherent in wire harnesses, improving the safety and reliability of use, and enhancing the aesthetics of the equipment.

[0021] Meanwhile, since the signal transmission medium of the infrared communication module is near-infrared light, the transmission of infrared light needs to be considered in the structure. By limiting the setting positions of the first infrared transceiver unit and the second infrared transceiver unit, the first infrared transceiver unit and the second infrared transceiver unit can be aligned with each other and communicate smoothly when the connection component is at least in the unfolded state. This allows the user to control the operation of the power tool through the user control module when the power tool is in working state. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of a lawnmower in the prior art.

[0023] Figure 2 This is a three-dimensional structural diagram of the power tool in the first embodiment of this utility model.

[0024] Figure 3 for Figure 2 A bottom view.

[0025] Figure 4 This is a schematic diagram of the signal transmission between the user control module and the main control module in the first embodiment of this utility model.

[0026] Figure 5 This is a schematic diagram of the signal transmission between the user control module and the main control module in the second embodiment of this utility model.

[0027] Figure 6 This is a schematic diagram of signal transmission between the user control module and the main control module in another embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the signal transmission between the user control module and the main control module in the third embodiment of this utility model. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0030] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] like Figure 1 As shown, the main control module (not shown) of existing lawnmowers is generally located on the main body 1 of the lawnmower, while the user control module 4 is located on the connecting component 2. The two are connected by a relatively long wiring harness 40, which enables the main control module to supply power to the user control module 4 and facilitates communication between them (i.e., the wiring harness 40 includes both power and communication lines). Signal transmission between the two is wired. The user control module 4 transmits detected switch signals to the main control module, which then controls the motor operation based on the received switch signals and simultaneously sends operating status information to the user control module 4. Because the user control module 4 and the main control module are connected by the wiring harness 40, this increases the cost and assembly difficulty of the equipment to some extent. Furthermore, during use, the wiring harness 40 is at risk of aging and breakage due to the folding and expansion of the connecting component 2, affecting safety and reliability. Additionally, the exposed wiring harness 40 also affects the aesthetics of the equipment.

[0032] To address the above problems, this application proposes the following solution:

[0033] First Embodiment

[0034] like Figures 2 to 4 As shown, the first embodiment of this utility model provides an electric tool, including a main body 1 (i.e., chassis), a connecting component 2 rotatably connected to the main body 1, a main control module 3 disposed on the main body 1, and a user control module 4 (i.e., control panel) disposed on the connecting component 2. The connecting component 2 is specifically rotatably connected to the rear end of the main body 1, and the connecting component 2 is retractable, so that the connecting component 2 has folding and retractable storage functions compared to the main body 1.

[0035] The user control module 4 includes a first control unit 41, and the main control module 3 includes a second control unit 31. In this embodiment, both the first control unit 41 and the second control unit 31 are MCUs (Microcontroller Units). The main body 1 is provided with a walking component 11 for supporting the main body 1, a walking drive motor 12 for driving the walking component 11 to rotate, a working part 13 for performing tasks, and a working drive motor 14 for driving the working part 13 to operate. The walking component 11 specifically includes rollers. The second control unit 31 is electrically connected to the walking drive motor 12 and the working drive motor 14 respectively. The main body 1 serves as the primary support structure for the power tool, assembling all parts into a single unit. The walking component 11 can rotate relative to the main body 1, allowing the main body 1 to move on the ground. The walking drive motor 12 is connected to the walking component 11 via a transmission mechanism (not shown), thereby driving the walking component 11 to rotate through the transmission mechanism. The working drive motor 14 drives the working part 13 to perform tasks (such as mowing lawns, snowplowing, etc.). The connecting component 2 connects the handle to the main body 1, allowing the user to push the power tool. The user control module 4 is used for user operation and can communicate with the main control module 3, thereby controlling the operation of the walking drive motor 12 and the working drive motor 14 through the main control module 3 based on user operation.

[0036] When the connecting component 2 rotates relative to the main body 1, the connecting component 2 has a folded state (not shown in the figure) and an unfolded state (i.e., as shown in the figure). Figure 2 (As shown in the diagram) and can switch between two states. When the power tool is in working state, the connecting component 2 rotates backward relative to the main body 1 and is in an unfolded state. At this time, the connecting component 2 is located behind the main body 1, and the angle between the connecting component 2 and the main body 1 is greater than 90° and less than 180° (that is, the angle between the connecting component 2 and the horizontal direction is greater than 90° and less than 180°). At this time, the user can push the power tool to move by the connecting component 2, and at the same time, the user can control the operation of the power tool by operating the user control module 4. When the power tool is not in working state, the connecting component 2 rotates forward relative to the main body 1 and is in a folded state. At this time, the connecting component 2 is close to the main body 1, thereby saving the space occupied by the device and making it easy to store.

[0037] The power tool also includes an infrared communication module 5, which comprises a first infrared transceiver unit 51 and a second infrared transceiver unit 52. The first infrared transceiver unit 51 is electrically connected to the first control unit 41, and the second infrared transceiver unit 52 is electrically connected to the second control unit 31. The first infrared transceiver unit 51 is mounted on the connecting component 2, and the second infrared transceiver unit 52 is mounted on the main body 1 or the connecting component 2. The distance between the first infrared transceiver unit 51 and the second infrared transceiver unit 52 is greater than or equal to 0.5 meters and less than or equal to 5 meters (or greater than or equal to 0.5 meters and less than or equal to 2 meters).

[0038] When the connecting component 2 is in the deployed state, both the first infrared transceiver unit 51 and the second infrared transceiver unit 52 are located on the plane of the connecting component 2, so that the first infrared transceiver unit 51 can be aligned with the second infrared transceiver unit 52 and establish a wireless communication link (that is, both the first infrared transceiver unit 51 and the second infrared transceiver unit 52 can receive the infrared signal sent by the other party, and at this time the first infrared transceiver unit 51 and the second infrared transceiver unit 52 can perform infrared wireless communication), thereby enabling the first control unit 41 and the second control unit 31 to perform wireless communication through the first infrared transceiver unit 51 and the second infrared transceiver unit 52. At this time, the user control module 4 and the main control module 3 can transmit control signals through the wireless communication link (that is, the user control module 4 and the main control module 3 can perform wireless communication through the infrared communication module 5).

[0039] Specifically, the first infrared transceiver unit 51 includes a first infrared transmitting unit and a first infrared receiving unit, and the second infrared transceiver unit 52 includes a second infrared transmitting unit and a second infrared receiving unit. The first infrared receiving unit can receive infrared signals emitted by the second infrared transmitting unit, and the second infrared receiving unit can receive infrared signals emitted by the first infrared transmitting unit. The infrared transmitting unit mainly includes devices such as infrared emitting tubes for emitting infrared rays, and the infrared receiving unit mainly includes devices such as infrared receiving tubes for receiving infrared rays. For the specific device structure and working principle of infrared communication technology, please refer to existing technologies, which will not be elaborated here.

[0040] The power tool provided in this embodiment, by setting an infrared communication module 5, enables the user control module 4 and the main control module 3 to communicate wirelessly through the infrared communication module 5, thereby reducing the use of wire harnesses, saving wire harness costs, reducing assembly difficulty, eliminating the risks inherent in the wire harnesses, improving the safety and reliability of use, and enhancing the aesthetics of the equipment.

[0041] Meanwhile, since the signal transmission medium of the infrared communication module 5 is near-infrared light, the transmission of infrared light needs to be considered in the structure. By limiting the setting positions of the first infrared transceiver unit 51 and the second infrared transceiver unit 52, the first infrared transceiver unit 51 and the second infrared transceiver unit 52 can be aligned with each other and communicate smoothly when the connecting component 2 is at least in the unfolded state (similar to the working principle of a TV remote control, the transmission path of infrared light is directional. If the first infrared transceiver unit 51 and the second infrared transceiver unit 52 are not aligned, they may not be able to receive the infrared signal sent by the other party smoothly, resulting in poor communication or no communication). This allows the user to control the operation of the power tool through the user control module 4 when the power tool is in working state.

[0042] like Figure 2 and Figure 4 As shown, in one implementation, the user control module 4 also includes interactive controls, including a walking motor switch 43 and a working motor switch 44, both of which are electrically connected to the first control unit 41. The walking motor switch 43 is operated by the user to control the operation of the walking drive motor 12 (the walking motor switch 43 can control the start / stop and working gear of the walking drive motor 12, etc.); the working motor switch 44 is operated by the user to control the operation of the working drive motor 14 (the working motor switch 44 can control the start / stop and working gear of the working drive motor 14, etc.). The main control module 3 also includes a first control circuit 32 and a second control circuit 33 (both the first control circuit 32 and the second control circuit 33 include various electronic components, such as resistors, inductors, and switching elements). The second control unit 31 is electrically connected to the walking drive motor 12 through the first control circuit 32, and the second control unit 31 is electrically connected to the working drive motor 14 through the second control circuit 33. Of course, the interactive controls also include other control elements, which will not be described in detail here.

[0043] like Figure 2 and Figure 4 As shown, in one embodiment, the power tool also includes a power module 15 (i.e., a battery pack), which supplies power to the drive motor 12, the work drive motor 14, the main control module 3, and other components. The power module 15 is electrically connected to the second control unit 31, enabling the second control unit 31 to acquire the status information of the power module 15 (e.g., battery level, operating temperature). The power module 15 is mounted on the main body 1 and is detachably connected to the main body 1. The main control module 3 is generally located below the power module 15.

[0044] like Figure 4As shown, in one implementation, the user control module 4 further includes a Bluetooth module 42, which is electrically connected to the first control unit 41. The Bluetooth module 42 is used for wireless communication with the external terminal device 6 (specifically, Bluetooth wireless communication). The external terminal device 6 can be the user's mobile terminal device (e.g., mobile phone, computer, etc.), remote control, etc. By setting the Bluetooth module 42 to communicate wirelessly with the external terminal device 6, the user can control the operation of the power tool through the external terminal device 6 (e.g., through a mobile APP).

[0045] like Figure 2 and Figure 4 As shown, in one embodiment, the connecting assembly 2 includes a lower push rod 21 and an upper push rod 22 arranged in parallel, with the lower push rod 21 and the upper push rod 22 located on the left and right sides of the main body 1, respectively. One end of the lower push rod 21 is rotatably connected to the main body 1, and the other end of the lower push rod 21 is retractably connected to one end of the upper push rod 22. Specifically, both the lower push rod 21 and the upper push rod 22 are hollow tubular structures, with the upper push rod 22 sleeved inside the lower push rod 21, and the upper push rod 22 can be retracted and stored inside the lower push rod 21. The user control module 4 is installed at the end of the upper push rod 22 away from the lower push rod 21, and the left and right ends of the user control module 4 are connected to the upper push rods 22 on the left and right sides, respectively. The connecting assembly 2 also includes a handle 24, which is connected to the end of the upper push rod 22 away from the lower push rod 21. The handle 24 is used for the user to hold and push the power tool. A telescopic control component 23 is provided at the connection between the lower push rod 21 and the upper push rod 22. The left and right ends of the telescopic control component 23 are respectively connected to the lower push rods 21 on the left and right sides. The telescopic control component 23 is arranged parallel to the user control module 4. The telescopic control component 23 is used to control the relative telescopic movement of the upper push rod 22 and the lower push rod 21. That is, the telescopic control component 23 can lock the upper push rod 22 and the lower push rod 21 so that the connecting component 2 is kept in the extended or retracted state.

[0046] The telescopic control component 23 includes a telescopic detection switch 231, which is electrically connected to the first control unit 41. The telescopic detection switch 231 is used to detect the telescopic state of the connecting component 2. When the connecting component 2 is in the retracted state or in a state between extension and retraction, the power tool cannot move or work (i.e., the second control unit 31 does not allow the walking drive motor 12 and the working drive motor 14 to operate). When the connecting component 2 is in the extended state, the power tool can move and work (i.e., the second control unit 31 allows the walking drive motor 12 and the working drive motor 14 to operate) to ensure safety.

[0047] A folding detection switch 16 is provided at the connection between the lower push rod 21 and the main body 1. The folding detection switch 16 is electrically connected to the second control unit 31 and is used to detect the folding state of the connecting component 2. When the connecting component 2 is in a folded state or in a state between folding and unfolding, the power tool cannot move or work (i.e., the second control unit 31 does not allow the walking drive motor 12 and the working drive motor 14 to operate). When the connecting component 2 is in an unfolded state, the power tool can move and work (i.e., the second control unit 31 allows the walking drive motor 12 and the working drive motor 14 to operate) to ensure safety. For the specific structure and working principle of the connecting component 2, the telescopic control component 23, the telescopic detection switch 231, and the folding detection switch 16, please refer to the applicant's previous patent applications (such as CN113875399B, CN114365616B, etc.), which will not be elaborated here.

[0048] As one implementation, the second infrared transceiver unit 52 is also disposed on the connecting component 2, that is, both the first infrared transceiver unit 51 and the second infrared transceiver unit 52 are disposed on the connecting component 2; thereby, when the connecting component 2 rotates relative to the main body 1, both the first infrared transceiver unit 51 and the second infrared transceiver unit 52 remain on the plane of the connecting component 2, that is, the first infrared transceiver unit 51 and the second infrared transceiver unit 52 can always maintain mutual alignment and establish a wireless communication link (when the connecting component 2 is extended, retracted and rotated and folded, the relative angles between the parts of the connecting component 2 will not change, so by disposing both the first infrared transceiver unit 51 and the second infrared transceiver unit 52 on the connecting component 2 and presetting their installation direction, it can be ensured that they are always in an aligned state).

[0049] Specifically, in this embodiment, the first infrared transceiver unit 51 is disposed on the user control module 4 (for example, the user control module 4 also includes a circuit board, and both the first control unit 41 and the first infrared transceiver unit 51 are disposed on the circuit board), and the second infrared transceiver unit 52 is disposed on the telescopic control component 23. Since the angle between the user control module 4 and the telescopic control component 23 does not change during the extension and folding of the connecting component 2 (they remain parallel), disposing the first infrared transceiver unit 51 on the user control module 4 and the second infrared transceiver unit 52 on the telescopic control component 23 ensures that the first infrared transceiver unit 51 and the second infrared transceiver unit 52 remain aligned, thereby maintaining good communication between them. Of course, in other embodiments, the first infrared transceiver unit 51 and the second infrared transceiver unit 52 can also be directly disposed on the body of the connecting component 2 or on other components of the connecting component 2.

[0050] Meanwhile, since the second infrared transceiver unit 52 is not directly mounted on the main body 1 at this time, it needs to be electrically connected to the second control unit 31 via a cable (not shown). The cable can be routed through the lower push rod 21, with one end electrically connected to the second infrared transceiver unit 52 and the other end passing through the lower push rod 21 and extending into the main body 1, ultimately connecting to the second control unit 31. Although this method requires additional cable installation, it shortens the cable length, and the concealed cable design improves the device's aesthetics.

[0051] In one implementation, the line connecting the first infrared transceiver unit 51 and the second infrared transceiver unit 52 is parallel to the extension direction (i.e., the length direction) of the lower push rod 21. The first infrared transceiver unit 51 is disposed on the side of the user control module 4 facing the telescopic control component 23, and the second infrared transceiver unit 52 is disposed on the side of the telescopic control component 23 facing the user control module 4 (the first infrared transceiver unit 51 can specifically be disposed on...). Figure 2 At position 1 shown in the diagram, the second infrared transceiver unit 52 can be specifically located at... Figure 2 (as shown in position 2); that is, the infrared light emitted by the first infrared transceiver unit 51 is generally directed towards the telescopic control component 23, and the infrared light emitted by the second infrared transceiver unit 52 is generally directed towards the user control module 4. This arrangement allows the first infrared transceiver unit 51 and the second infrared transceiver unit 52 to be better aligned and maintain good communication performance.

[0052] In one implementation, the user control module 4 is detachably connected to the connection component 2. When the power tool is working, the user can detach the user control module 4 from the connection component 2 to remotely control the operation of the power tool through the user control module 4.

[0053] like Figure 2 and Figure 3 As shown, in one embodiment, the power tool is a lawnmower. The working component 13 includes a mowing blade, which is located at the bottom of the main body 1. The drive motor 14 drives the mowing blade to rotate for mowing. A grass collection box (not labeled) is located at the rear of the main body 1 to collect the grass cut by the mowing blade. Of course, in other embodiments, the power tool can also be a snowplow, etc., in which case the working component 13 can be replaced with a snowplow component, etc.

[0054] Second Embodiment

[0055] like Figure 5As shown, the power tool provided in the second embodiment of this utility model is basically the same as that in the first embodiment, except that a third infrared transceiver unit 53 is used instead of the folding detection switch 16 in the first embodiment to detect the folding state of the connecting component 2.

[0056] Specifically, in this embodiment, the first infrared transceiver unit 51 and the second infrared transceiver unit 52 are both disposed on the connecting component 2. Specifically, the first infrared transceiver unit 51 is disposed on the user control module 4, and the second infrared transceiver unit 52 is disposed on the telescopic control component 23. When the connecting component 2 rotates relative to the main body 1, the first infrared transceiver unit 51 and the second infrared transceiver unit 52 can maintain mutual alignment.

[0057] The infrared communication module 5 also includes a third infrared transceiver unit 53, which is disposed on the main body 1 and is electrically connected to the second control unit 31 (specifically, it can be connected via a wire harness). When the connecting component 2 is in the unfolded state, the first infrared transceiver unit 51 and the third infrared transceiver unit 53 are aligned with each other, and the first infrared transceiver unit 51 can establish a wireless communication link with the third infrared transceiver unit 53. At this time, the second control unit 31 controls the walking drive motor 12 and the working drive motor 14 to be in the first mode. Specifically, at this time, the second control unit 31 allows the walking drive motor 12 and the working drive motor 14 to operate. When the first infrared transceiver unit 51 cannot establish a wireless communication link with the third infrared transceiver unit 53, the second control unit 31 controls the walking drive motor 12 and the working drive motor 14 to be in the second mode. Specifically, at this time, the second control unit 31 controls the walking drive motor 12 and the working drive motor 14 not to operate (that is, at this time, the second control unit 31 does not allow the walking drive motor 12 and the working drive motor 14 to operate). Thus, the third infrared transceiver unit 53 can replace the folding detection switch 16 to detect the folding state of the connecting component 2. That is, the third infrared transceiver unit 53 can cooperate with the first infrared transceiver unit 51 to act as a safety switch.

[0058] The specific principle is as follows: Due to the directional nature of infrared light transmission paths, the angle between the connecting component 2 and the main body 1 changes during the rotation and folding process. By pre-setting the installation positions and orientations of the first infrared transceiver unit 51 and the third infrared transceiver unit 53, when the connecting component 2 is in the unfolded state, the first infrared transceiver unit 51 and the third infrared transceiver unit 53 are aligned with each other and can communicate. The second control unit 31 thus obtains that the connecting component 2 is in the unfolded state. When the connecting component 2 is in the folded state or in a state between folding and unfolding, the angle between the connecting component 2 and the main body 1 changes, and therefore the relative angle between the first infrared transceiver unit 51 and the third infrared transceiver unit 53 also changes. At this time, the two are not aligned and cannot communicate (or the signal is very weak). The second control unit 31 thus obtains that the connecting component 2 is in the non-unfolded state.

[0059] In this embodiment, since the infrared light emitted by the first infrared transceiver unit 51 propagates approximately toward the telescopic control component 23, that is, approximately toward the rear end of the main body 1, the third infrared transceiver unit 53 is disposed on the rear end of the main body 1 (the third infrared transceiver unit 53 may specifically be disposed on...). Figure 2 The location shown is 3, so that the first infrared transceiver unit 51 and the third infrared transceiver unit 53 can communicate when the connecting component 2 is in the deployed state, and cannot communicate when the connecting component 2 is in the non-deployed state. Of course, in other embodiments, the third infrared transceiver unit 53 can also be located at other positions on the main body 1.

[0060] like Figure 6As shown, in another embodiment, the infrared communication module 5 further includes a fourth infrared transceiver unit 54, which is electrically connected to the second control unit 31 and is disposed on the main body 1. When the connecting component 2 is in a folded state, the fourth infrared transceiver unit 54 can establish a wireless communication link with the first infrared transceiver unit 51 and / or the second infrared transceiver unit 52. When the connecting component 2 is not folded, the fourth infrared transceiver unit 54 cannot establish a wireless communication link with the first infrared transceiver unit 51 and / or the second infrared transceiver unit 52. This allows the first control unit 41 and / or the second control unit 31 to sense whether the connecting component 2 is in a folded state (i.e., whether it is folded in place), thereby facilitating the device to perform corresponding operations. For example, when the power tool is finished using it, if the connecting component 2 is folded in place when the user folds it, the user control module 4 will issue a prompt message indicating that it is folded in place; if the connecting component 2 is not folded in place, the user control module 4 will issue a prompt message indicating that it is not folded in place, to remind the user to perform the folding operation again. Since the user control module 4 and the telescopic control component 23 are both close to the front end of the main body 1 when the connecting component 2 is in the folded state, that is, the first infrared transceiver unit 51 and the second infrared transceiver unit 52 are located at the front end of the main body 1 at this time, the fourth infrared transceiver unit 54 can be disposed on the front end of the main body 1 (the fourth infrared transceiver unit 54 can be specifically disposed on...). Figure 2 Position 4 shown is located on the front side wall of the power module 15. Of course, in other embodiments, the fourth infrared transceiver unit 54 can also be located at other positions on the main body 1.

[0061] The specific structure and working principle of the third infrared transceiver unit 53 and the fourth infrared transceiver unit 54 are the same as or similar to those of the first infrared transceiver unit 51 and the second infrared transceiver unit 52, and will not be described in detail here.

[0062] The other structures and working principles of this embodiment are the same as or similar to those of the first embodiment, and will not be described in detail here.

[0063] Third Embodiment

[0064] like Figure 7 As shown, the power tool provided in the third embodiment of this utility model is basically the same as that in the first embodiment, except that the second infrared transceiver unit 52 is positioned differently, and the second infrared transceiver unit 52 is used instead of the folding detection switch 16 in the first embodiment to detect the folding state of the connecting component 2.

[0065] Specifically, in this embodiment, the first infrared transceiver unit 51 is disposed on the connecting component 2, specifically on the user control module 4; the second infrared transceiver unit 52 is disposed on the main body 1. When the connecting component 2 is in the unfolded state, both the first infrared transceiver unit 51 and the second infrared transceiver unit 52 are on the plane of the connecting component 2. The first infrared transceiver unit 51 can align with the second infrared transceiver unit 52 and establish a wireless communication link. At this time, the second control unit 31 controls the walking drive motor 12 and the working drive motor 14 to be in the first mode. Specifically, at this time, the second control unit 31 allows the walking drive motor 12 and the working drive motor 14 to operate. When the first infrared transceiver unit 51 cannot establish a wireless communication link with the second infrared transceiver unit 52, the second control unit 31 controls the walking drive motor 12 and the working drive motor 14 to be in the second mode. Specifically, at this time, the second control unit 31 controls the walking drive motor 12 and the working drive motor 14 not to operate (i.e., at this time, the second control unit 31 does not allow the walking drive motor 12 and the working drive motor 14 to operate). This allows the second infrared transceiver unit 52 to replace the folding detection switch 16 in detecting the folding state of the connecting component 2. That is, the second infrared transceiver unit 52 can cooperate with the first infrared transceiver unit 51 to realize wireless communication between the first control unit 41 and the second control unit 31 (it should be noted that when the connecting component 2 is in the non-expanded state, the power tool is generally not in operation, and the first control unit 41 and the second control unit 31 do not need to communicate; in other words, it is only necessary to ensure that the first control unit 41 and the second control unit 31 can communicate when the connecting component 2 is in the unfolded state). The second infrared transceiver unit 52 can also cooperate with the first infrared transceiver unit 51 to act as a safety switch.

[0066] The specific principle is as follows: Due to the directional nature of infrared light transmission paths, the angle between the connecting component 2 and the main body 1 changes during the rotation and folding process. By pre-setting the installation positions and orientations of the first infrared transceiver unit 51 and the second infrared transceiver unit 52, when the connecting component 2 is in the unfolded state, the first infrared transceiver unit 51 and the second infrared transceiver unit 52 are aligned with each other and can communicate. The second control unit 31 thus obtains that the connecting component 2 is in the unfolded state. When the connecting component 2 is in the folded state or in a state between folding and unfolding, the angle between the connecting component 2 and the main body 1 changes, and therefore the relative angle between the first infrared transceiver unit 51 and the second infrared transceiver unit 52 also changes. At this time, the two are not aligned and cannot communicate (or the signal is very weak). The second control unit 31 thus obtains that the connecting component 2 is in the non-unfolded state.

[0067] In this embodiment, since the infrared light emitted by the first infrared transceiver unit 51 propagates approximately toward the telescopic control component 23, that is, approximately toward the rear end of the main body 1, the second infrared transceiver unit 52 is disposed on the rear end of the main body 1 (the second infrared transceiver unit 52 may specifically be disposed on...). Figure 2 The location shown is 3, so that the first infrared transceiver unit 51 and the second infrared transceiver unit 52 can communicate when the connecting component 2 is in the deployed state, and cannot communicate when the connecting component 2 is in the non-deployed state. Of course, in other embodiments, the second infrared transceiver unit 52 can also be located at other positions on the main body 1.

[0068] In this embodiment, the infrared communication module 5 further includes a fourth infrared transceiver unit 54, which is electrically connected to the second control unit 31 and is disposed on the main body 1. When the connecting component 2 is in a folded state, the fourth infrared transceiver unit 54 can establish a wireless communication link with the first infrared transceiver unit 51. When the connecting component 2 is in an open state, the fourth infrared transceiver unit 54 cannot establish a wireless communication link with the first infrared transceiver unit 51. This allows the first control unit 41 to sense whether the connecting component 2 is in a folded state (i.e., whether it is folded in place), thus facilitating the device to perform corresponding operations. For example, when the power tool is finished using it, if the connecting component 2 is folded in place, the user control module 4 will issue a prompt message indicating that it is folded in place; if the connecting component 2 is not folded in place, the user control module 4 will issue a prompt message indicating that it is not folded in place, reminding the user to perform the folding operation again. Since the user control module 4 is close to the front end of the main body 1 when the connecting component 2 is in the folded state, that is, the first infrared transceiver unit 51 is located at the front end of the main body 1 at this time, the fourth infrared transceiver unit 54 can be disposed on the front end of the main body 1 (the fourth infrared transceiver unit 54 can be specifically disposed on...). Figure 2 Position 4 shown is located on the front side wall of the power module 15. Of course, in other embodiments, the fourth infrared transceiver unit 54 can also be located at other positions on the main body 1.

[0069] The other structures and working principles of this embodiment are the same as or similar to those of the first embodiment, and will not be described in detail here.

[0070] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A power tool, comprising a main body, a connecting assembly rotatably connected to the main body, a main control module disposed on the main body, and a user control module disposed on the connecting assembly, wherein the user control module includes a first control unit, and the main control module includes a second control unit; the connecting assembly has a folded state and an unfolded state when rotating relative to the main body; characterized in that, The power tool also includes an infrared communication module, which includes a first infrared transceiver unit and a second infrared transceiver unit. The first infrared transceiver unit is electrically connected to the first control unit, and the second infrared transceiver unit is electrically connected to the second control unit. The first infrared transceiver unit is disposed on the connection component, and the second infrared transceiver unit is disposed on the main body or the connection component; When the connecting component is in the deployed state, the angle between the connecting component and the main body is greater than 90° and less than 180°. The first infrared transceiver unit and the second infrared transceiver unit are both located on the plane of the connecting component, so that the first infrared transceiver unit can be aligned with the second infrared transceiver unit and establish a wireless communication link. The user control module and the main control module transmit control signals through the wireless communication link.

2. The power tool as described in claim 1, characterized in that, The second infrared transceiver unit is disposed on the connecting component; when the connecting component rotates relative to the main body, both the first infrared transceiver unit and the second infrared transceiver unit remain on the plane where the connecting component is located.

3. The power tool as described in claim 2, characterized in that, The connecting assembly includes a lower push rod and an upper push rod. One end of the lower push rod is rotatably connected to the main body, and the other end of the lower push rod is retractably connected to one end of the upper push rod. The user control module is installed on the end of the upper push rod away from the lower push rod, and the first infrared transceiver unit is disposed on the user control module. A telescopic control component is provided at the connection between the lower push rod and the upper push rod. The telescopic control component is used to control the relative telescopic movement of the upper push rod and the lower push rod. The second infrared transceiver unit is disposed on the telescopic control component.

4. The power tool as described in claim 3, characterized in that, The line connecting the first infrared transceiver unit and the second infrared transceiver unit is parallel to the extension direction of the lower push rod.

5. The power tool as described in claim 3, characterized in that, The first infrared transceiver unit is disposed on the side of the user control module facing the telescopic control component, and the second infrared transceiver unit is disposed on the side of the telescopic control component facing the user control module.

6. The power tool as described in claim 3, characterized in that, The second infrared transceiver unit and the second control unit are connected by a cable, which runs through the lower push rod.

7. The power tool as described in claim 2, characterized in that, The main body is provided with a walking component for supporting the main body, a walking drive motor for driving the walking component to rotate, a workpiece for performing operations, and a work drive motor for driving the workpiece to operate. The second control unit is electrically connected to the walking drive motor and the work drive motor respectively. The infrared communication module further includes a third infrared transceiver unit, which is electrically connected to the second control unit and is disposed on the main body. When the connection component is in the deployed state, the first infrared transceiver unit can establish a wireless communication link with the third infrared transceiver unit. At this time, the second control unit controls the walking drive motor and the working drive motor to be in the first mode. When the first infrared transceiver unit cannot establish a wireless communication link with the third infrared transceiver unit, the second control unit controls the walking drive motor and the working drive motor to be in the second mode.

8. The power tool as claimed in any one of claims 2-7, characterized in that, The infrared communication module further includes a fourth infrared transceiver unit, which is electrically connected to the second control unit and is disposed on the main body. When the connecting component is in a folded state, the fourth infrared transceiver unit can establish a wireless communication link with the first infrared transceiver unit and / or the second infrared transceiver unit.

9. The power tool as claimed in claim 1, characterized in that, The second infrared transceiver unit is disposed on the main body; the main body is provided with a walking component for supporting the main body, a walking drive motor for driving the walking component to rotate, a workpiece for performing operations, and a work drive motor for driving the workpiece to operate; the second control unit is electrically connected to the walking drive motor and the work drive motor respectively. When the connection component is in the deployed state, the first infrared transceiver unit can establish a wireless communication link with the second infrared transceiver unit, and the second control unit controls the walking drive motor and the working drive motor to be in a first mode; when the first infrared transceiver unit cannot establish a wireless communication link with the second infrared transceiver unit, the second control unit controls the walking drive motor and the working drive motor to be in a second mode.

10. The power tool as claimed in claim 9, characterized in that, The infrared communication module further includes a fourth infrared transceiver unit, which is electrically connected to the second control unit and is disposed on the main body. When the connecting component is in a folded state, the fourth infrared transceiver unit can establish a wireless communication link with the first infrared transceiver unit.

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