Electric tool for cleaning

Abstract

The utility model relates to an electric tool for cleaning, and the electric tool comprises a cleaning device which comprises a working accessory for cleaning; the driving device comprises a motor used for driving the working accessory to rotate, and the motor comprises a motor shaft rotating around a first straight line; the operation device is used for being operated by a user to control the electric tool; the power supply device is used for providing power for the driving device; and the connecting device is used for connecting the driving device and the operating device. The connecting device comprises a first connecting device connected with the driving device; and one end of the second connecting device is connected with the first connecting device and the other end is connected with the operating device. Wherein the first connecting device is detachably connected with the second connecting device. The electric tool can adapt to more use working conditions, and the fatigue feeling of a user using the tool is reduced.

Description

Technical Field

[0001] The present application relates to an electric tool for cleaning, and in particular to an electric cleaning brush. Background Art

[0002] A cleaning brush is an electric tool used for cleaning, mainly used for cleaning the floor, and can also be used to clean the surface of walls or other objects. Ordinary cleaning brushes are limited in their use, and users may easily feel tired when using them in different situations.

[0003] This section provides background information related to the present application which is not necessarily prior art. Utility Model Content

[0004] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, the object of the present application is to provide an electric tool that can adapt to more working environments and can reduce the fatigue of the user during work.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] A power tool for cleaning, comprising: a cleaning device, comprising a working accessory for cleaning; a driving device, comprising a motor for driving the working accessory to rotate, the motor comprising a motor shaft rotating around a first straight line; an operating device, for a user to operate to control the power tool; a power supply device, for providing power to the driving device; a connecting device, for connecting the driving device and the operating device; the connecting device comprises: a first connecting device, connected to the driving device; a second connecting device, one end of which is connected to the first connecting device and the other end is connected to the operating device; wherein the first connecting device and the second connecting device are detachably connected.

[0007] In some embodiments, the connection device further includes a first electrical plug assembly, and the first connection device and the second connection device are electrically connected via the first electrical plug assembly.

[0008] In some embodiments, the first electrical plug assembly includes a first plug and a first socket, and the first electrical plug assembly is configured such that: when the first plug is inserted into the first socket, the first electrical plug assembly is in an on state; when the first plug is unplugged from the first socket, the first electrical plug assembly is in a off state.

[0009] In some embodiments, the first plug is arranged at one end of the first connecting device, and the first socket is arranged at one end of the second connecting device connected to the first connecting device; or, the first plug is arranged at one end of the second connecting device, and the first socket is arranged at one end of the first connecting device connected to the second connecting device.

[0010] In some embodiments, the power supply device includes a power supply housing for accommodating a battery pack, and the power supply housing is connected to the first connecting device.

[0011] In some embodiments, the connecting device also includes a third connecting device, one end of which is connected to the second connecting device, and the third connecting device is detachably connected to the second connecting device; the operating device includes a main handle and an auxiliary handle, and the auxiliary handle is used to cooperate with the main handle to allow the user to hold the main handle and the auxiliary handle with both hands respectively; the main handle is connected to the third connecting device, and the auxiliary handle is connected to the second connecting device.

[0012] In some embodiments, the power supply device includes a power supply housing for accommodating a battery pack, and the power supply housing is connected to the third connecting device and is disposed between the main handle and the auxiliary handle.

[0013] In some embodiments, the connection device further includes a second electrical plug assembly, and the third connection device is electrically connected to the second connection device via the second electrical plug assembly.

[0014] In some embodiments, the second electrical plug assembly includes a second plug and a second socket, and the second electrical plug assembly is configured such that: when the second plug is inserted into the second socket, the second electrical plug assembly is in an on state; when the second plug is unplugged from the second socket, the second electrical plug assembly is in a off state.

[0015] In some embodiments, the second plug is arranged at one end of the second connecting device, and the second socket is arranged at one end of the third connecting device connected to the second connecting device; or, the second plug is arranged at one end of the third connecting device, and the second socket is arranged at one end of the second connecting device connected to the third connecting device.

[0016] A power tool for cleaning includes: a cleaning device including a working accessory for cleaning; a driving device including a motor for driving the working accessory to rotate, the motor including a motor shaft rotating around a first straight line; an operating device for a user to operate to control the power tool; a power supply device for providing power to the driving device; and a connecting device for connecting the driving device and the operating device. The operating device includes a main handle for a user to hold; wherein the power supply device is arranged between the main handle and the driving device.

[0017] In some embodiments, the power supply device includes a power supply housing for accommodating a battery pack, and the power supply housing is disposed between the main handle and the drive device.

[0018] In some embodiments, the operating device further includes an auxiliary handle for cooperating with the main handle to allow the user to hold the main handle and the auxiliary handle with both hands respectively, wherein the power supply housing is disposed between the main handle and the auxiliary handle.

[0019] In some embodiments, the auxiliary handle is configured in a ring or U-shape.

[0020] In some embodiments, the connection device further includes an auxiliary grip portion for cooperating with the main handle to allow the user to hold the main handle and the auxiliary grip portion with both hands respectively, wherein the power supply housing is disposed between the main handle and the auxiliary grip portion.

[0021] In some embodiments, the connecting device extends in the direction of the second straight line; the main handle includes: a first grip portion, arranged at one end of the main handle facing the power supply shell; a second grip portion, arranged at one end of the main handle away from the power supply shell; wherein the first grip portion extends in the direction of the second straight line, and the extension direction of the second grip portion is inclined to the second straight line.

[0022] In some embodiments, the inclination angle between the extension direction of the second gripping portion and the second straight line is 5° to 50°.

[0023] In some embodiments, the power supply device includes a battery pack, which is used to provide DC power to the motor; the power supply housing includes a storage compartment for accommodating the battery pack; the connecting device extends along the direction of the second straight line; wherein the battery pack enters the storage compartment along a direction parallel to the direction of the second straight line, or the battery pack enters the storage compartment along a direction inclined to the direction of the second straight line.

[0024] In some embodiments, the operating device also includes a switch assembly that can control the start and stop of the driving device, and the switch assembly is arranged opposite to the power supply housing.

[0025] In some embodiments, the switch assembly includes a speed switch for adjusting the speed of the motor.

[0026] In some embodiments, the operating device further comprises a switch cover for shielding the switch assembly.

[0027] In some embodiments, the connecting device is hingedly connected to the driving device via a hinge assembly, and the connecting device can rotate within a preset angle range with the third straight line as the rotation axis.

[0028] In some embodiments, the distance between the third straight line and the first straight line is less than or equal to the maximum distance between the cleaning device and the first straight line.

[0029] In some embodiments, the minimum distance between the third straight line and the cleaning device is 10 mm to 100 mm.

[0030] In some embodiments, the power tool includes a hanger for allowing a user to hang the power tool.

[0031] In some embodiments, the suspension member is disposed on the operating device or the driving device.

[0032] In some embodiments, the hanging member is a hook.

[0033] In some embodiments, the power supply device includes a rectifier module for converting alternating current into direct current.

[0034] In some embodiments, the power supply device includes a battery pack for providing DC power to the motor, and the voltage of the battery pack is one of 12V, 18V, 24V, 36V, and 56V.

[0035] In some embodiments, the power tool further comprises a lighting device for providing a supplementary light source.

[0036] In some embodiments, the electric tool further comprises a water suction device for sucking liquid.

[0037] In some embodiments, the electric tool further comprises a liquid outlet device for discharging cleaning liquid or clean water.

[0038] In some embodiments, the liquid outlet device can drip cleaning liquid or water.

[0039] In some embodiments, the liquid outlet device can spray cleaning liquid or water.

[0040] In some embodiments, the electric tool further includes an external mounting device for mounting an external water pipe.

[0041] In some embodiments, the drive device also includes: a transmission assembly for transmitting the torque of the motor to the working accessory; a first device shell for accommodating the motor; a second device shell for accommodating the transmission assembly; wherein a waterproof sealing gasket is provided at the connection interface between the first device shell and the second device shell.

[0042] In some embodiments, the transmission assembly is a planetary gear set.

[0043] In some embodiments, the power supply device includes: a battery pack for providing DC power to the motor; and a power supply housing for accommodating the battery pack; wherein the power supply housing includes a accommodating chamber for accommodating the battery pack, and the accommodating chamber can prevent the battery pack from being sprayed with liquid during cleaning.

[0044] In some embodiments, the first housing is used to form a cavity for accommodating the battery pack, and the first housing has an opening allowing the battery pack to enter the cavity; the second housing is used to cover the opening.

[0045] In some embodiments, the receiving compartment is disposed below the operating device.

[0046] In some embodiments, the motor has a rotation speed of 12,000 to 25,000 revolutions per minute.

[0047] In some embodiments, the rotation speed of the working attachment is 250 to 600 revolutions per minute.

[0048] In some embodiments, the connecting device includes a telescopic rod, the telescopic rod includes an extended state and a contracted state, and the ratio of the length of the telescopic rod in the contracted state to the length of the telescopic rod in the extended state is 0.4 to 0.8.

[0049] In some embodiments, the electric tool includes a tool body, and the tool body includes a cleaning device, a driving device, an operating device and a connecting device.

[0050] In some embodiments, the tool body weighs 1.5 kg to 3 kg.

[0051] In some embodiments, the tool body has a length of 50 cm to 150 cm.

[0052] In some embodiments, the center of gravity of the tool body is located between the drive device and the operating device.

[0053] A power tool for cleaning includes: a cleaning device including a working accessory for cleaning; a driving device including a motor for driving the working accessory to rotate, the motor including a motor shaft rotating around a first straight line; a power supply device for providing power to the driving device; an operating device for a user to operate to control the power tool; and a connecting device for connecting the driving device and the operating device. The working accessories include: a first cleaning accessory, which is configured to be driven to rotate by the driving device; and a second cleaning accessory, which is configured to be driven to rotate directly or indirectly by the rotating first cleaning accessory.

[0054] In some embodiments, the first cleaning attachment rotates in a first rotation direction; the second cleaning attachment rotates in a second rotation direction and / or the first rotation direction; wherein the first rotation direction is opposite to the second rotation direction.

[0055] In some embodiments, the first cleaning attachment is disposed side by side with the second cleaning attachment.

[0056] In some embodiments, the plurality of second cleaning attachments are symmetrically arranged around the first cleaning attachment.

[0057] In some embodiments, the diameter of the first cleaning attachment is equal to the diameter of the second cleaning attachment.

[0058] In some embodiments, the number of second cleaning accessories rotating in the second rotation direction is equal to the number of second cleaning accessories rotating in the first rotation direction.

[0059] In some embodiments, a plurality of second cleaning attachments are arranged around the first cleaning attachment.

[0060] In some embodiments, the first cleaning attachment is located at the geometric center of a shape surrounded by the plurality of second cleaning attachments.

[0061] In some embodiments, all of the second cleaning attachments rotate in the second rotational direction.

[0062] In some embodiments, the diameter of the first cleaning attachment is equal to the diameter of the second cleaning attachment.

[0063] In some embodiments, the diameter of the first cleaning attachment is greater than the diameter of the second cleaning attachment.

[0064] In some embodiments, the working attachment has a diameter of 40 mm to 150 mm.

[0065] In some embodiments, on a projection plane perpendicular to the first straight line, projections of cleaning areas of two adjacent working attachments when rotating have overlapping areas.

[0066] In some embodiments, the cleaning device further comprises a mounting frame, and the working accessory is mounted on the mounting frame.

[0067] In some embodiments, the mounting bracket is configured to be made of a transparent or translucent material.

[0068] In some embodiments, the mounting frame is configured as one of a rectangular, a racetrack, a triangle, and a circle.

[0069] In some embodiments, on a projection plane perpendicular to the first straight line, a portion of a cleaning area of ​​the working attachment when rotating exceeds a boundary of a projection of the mounting frame.

[0070] In some embodiments, the working accessory includes: a brush plate mounted on a mounting frame; and bristles mounted on a lower surface of the brush plate, wherein on a projection plane perpendicular to the first straight line, projections of some bristles are outside the projection area of ​​the brush plate.

[0071] In some embodiments, the lower surface of the brush plate includes: a first area, which is arranged in the central area of ​​the brush plate, and the first area is arranged so that the bristles installed in the first area extend in a direction toward the center of the brush plate; a second area, which is arranged outside the first area, and the second area is arranged so that the extension direction of the bristles installed in the second area is parallel to or inclined to the first straight line; a third area, which is arranged outside the second area, and the third area is arranged so that the bristles installed in the third area extend in a direction away from the center of the brush plate.

[0072] In some embodiments, a ratio of an area of ​​the region where the bristles are installed to a total area of ​​the lower surface of the brush plate ranges from 50% to 95%.

[0073] In some embodiments, the ratio of the height of the bristles to the diameter of the lower surface of the brush plate ranges from 25% to 50%.

[0074] An electric tool for cleaning, comprising: a cleaning device including a working attachment for cleaning; a driving device including a motor for driving the working attachment to rotate, the motor including a motor shaft rotating around a first straight line; a power supply device for providing power to the driving device; an operating device for a user to operate to control the electric tool; and a connecting device for connecting the driving device and the operating device. The electric tool also includes: a quick clamp device configured to be able to detachably connect the cleaning device to the driving device; the cleaning device includes a mounting portion for being mounted to the quick clamp device. The quick clamp device includes: a quick clamp locking state, in which the quick clamp locking state the quick clamp device is configured to connect the cleaning device and restrict the movement of the cleaning device in the first straight line direction; and a quick clamp unlocking state, in which the quick clamp device is configured to be able to separate from the cleaning device and allow the cleaning device to move in the first straight line direction.

[0075] In some embodiments, the quick clamp device includes: a limit member for limiting the displacement of the mounting part in the first straight line direction; in the quick clamp locked state, the limit member is connected to the mounting part and limits the movement of the mounting part in the first straight line direction; in the quick clamp unlocked state, the limit member is configured to be able to separate from the mounting part and allow the mounting part to move in the first straight line direction.

[0076] In some embodiments, the mounting portion includes a limiting groove: in the quick-clip locked state, the limiting member enters the limiting groove and limits the movement of the mounting portion in the first straight line direction; in the quick-clip unlocked state, the limiting member leaves the limiting groove and is separated from the mounting portion.

[0077] In some embodiments, the quick clamping device further includes an unlocking assembly for allowing the limiting member to move so that the limiting member is connected to the mounting portion or separated from the mounting portion.

[0078] In some embodiments, the unlocking assembly includes: a first unlocking member, which can abut against the limiting member so that the limiting member is connected to the mounting portion; and a first elastic member, which can press the first unlocking member in a first straight line direction so that the first unlocking member abuts against the limiting member. The first unlocking member is configured to move in the first straight line direction so that the limiting member can be connected to or separated from the mounting portion.

[0079] In some embodiments, the first elastic component presses the first unlocking member downward along the first straight line direction; the first unlocking member is configured to move downward along the first straight line direction to separate the limiting member from the mounting portion.

[0080] In some embodiments, the first unlocking member includes an abutting portion, which extends in a direction perpendicular to the first straight line toward the mounting portion. The abutting portion is configured to abut against the limiting member in the quick clamp locking state and separate from the limiting member in the quick clamp unlocking state.

[0081] In some embodiments, the unlocking assembly further includes a second unlocking member, the second unlocking member abuts against the first unlocking member, and the movement of the second unlocking member in a direction perpendicular to the first straight line can push the first unlocking member to move in a direction away from the limiting member.

[0082] In some embodiments, the surface where the second unlocking member abuts against the first unlocking member includes an inclined surface.

[0083] In some embodiments, the stopper is a sphere.

[0084] A power tool for cleaning, comprising: a cleaning device, comprising a working attachment for cleaning; a driving device, comprising a motor for driving the working attachment to rotate around a first straight line, the motor comprising a motor shaft rotating around the first straight line; a power supply device, for providing power to the driving device; an operating device, for a user to operate to control the power tool; a connecting device, for connecting the driving device and the operating device. The power tool also includes a rotating device, which is configured to allow the cleaning device to rotate with the first straight line as the rotation axis.

[0085] In some embodiments, the rotating device includes: a rotation locking state, which prohibits the cleaning device from rotating; and a rotation unlocking state, which allows the cleaning device to rotate around the first straight line.

[0086] In some embodiments, the rotating device includes a first locking member and a second elastic member; the cleaning device includes a first matching portion, which is configured to be able to engage with at least a portion of the first locking member; the second elastic member is configured to be able to press the first locking member downward along a first straight line direction so that the first locking member engages with the first matching portion. In the rotation unlocking state, the first locking member is configured to be able to rotate around the first straight line; in the rotation locking state, the first locking member is configured to be prohibited from rotating around the first straight line.

[0087] In some embodiments, in the unlocked state, the cleaning device is configured to withstand an upward force along the direction of a first straight line, so that the first locking member engaged with the first matching portion moves upward along the direction of the first straight line to a preset position, and then the rotating device can be switched to a rotational locking state.

[0088] In some embodiments, a side of the first locking member facing the first matching portion is configured as a toothed disc; a side of the first matching portion facing the first locking member is configured as a toothed disc capable of meshing with the first locking member.

[0089] In some embodiments, the rotating device includes a second locking member; the cleaning device includes a second matching portion, which is configured to be snap-connected with at least a portion of the second locking member. In the rotationally locked state, the second matching portion is snap-connected with the second locking member; in the rotationally unlocked state, the second matching portion is disengaged from the second locking member.

[0090] In some embodiments, in the unlocked state, the cleaning device is configured to withstand an upward force along the direction of the first straight line, so that the second mating portion can move upward along the direction of the first straight line under the action of the upward force until it is snap-connected with the second locking member.

[0091] In some embodiments, the second locking member includes a protrusion; and the second matching portion includes a groove portion matching the shape of the protrusion.

[0092] In some embodiments, the rotating device includes a third locking member, which is configured as a sphere. The cleaning device includes a third matching portion, which includes a first groove and a plurality of second grooves that match the size of the third locking member, and the first groove is connected to the second groove. The rotating device is configured such that: in a rotationally locked state, the third locking member enters the second groove; in a rotationally unlocked state, the third locking member can leave and enter the second groove, and can move in the first groove.

[0093] In some embodiments, in the rotationally unlocked state, the cleaning device is configured to withstand an upward force along the direction of the first straight line, so that the third mating portion can move upward along the direction of the first straight line under the action of the upward force until the third locking member moves from the first groove to the second groove.

[0094] The beneficial effect of the present application is that the user can switch the power tool between the long form and the short form by disassembling the connecting device to adapt to different use conditions. The driving device is arranged at the front end of the connecting device, so that no matter whether the power tool is in the long form or the short form, the user can use the power tool with less effort, reducing the user's fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] Figure 1 is a three-dimensional diagram of a power tool provided in one embodiment of the present application;

[0096] Figure 2 yes Figure 1 An exploded view of a portion of the structure of the drive device and the connecting device;

[0097] Figure 3 is a three-dimensional diagram of another auxiliary handle provided in one embodiment of the present application;

[0098] Figure 4 yes Figure 1 A three-dimensional diagram of a power tool having an auxiliary grip portion;

[0099] Figure 5 yes Figure 1 The plan view of the power tool in;

[0100] Figure 6 yes Figure 5A partial enlarged view of the middle A area;

[0101] Figure 7 yes Figure 5 A partial enlarged view of the middle B area;

[0102] Figure 8a yes Figure 1 A three-dimensional diagram of a cleaning device in FIG.

[0103] Figure 8b yes Figure 8a A bottom view of a cleaning device;

[0104] Figure 9a is a three-dimensional diagram of a cleaning device provided in one embodiment of the present application;

[0105] Figure 9b yes Figure 9a A bottom view of a cleaning device;

[0106] Fig.10 yes Figure 8a A bottom view of the working attachment in FIG.

[0107] Fig.11a yes Figure 1 A three-dimensional diagram of the cleaning device and the driving device in a state of quick clamp locking;

[0108] Fig.11b yes Figure 1 A three-dimensional diagram of the cleaning device and the driving device in the quick-clamp unlocking state;

[0109] Fig.12 yes Fig.11a A three-dimensional diagram of the mounting portion and the limiting member in FIG.

[0110] Fig.13 yes Fig.11a A cross-sectional view of the structure shown in the quick-clip locked state;

[0111] Fig.14 yes Fig.13 A partial enlarged view of the middle C area;

[0112] Fig.15 yes Fig.13 The plan view of the middle C area with the quick clip unlocked;

[0113] Fig.16 yes Fig.13 A three-dimensional view of the first elastic component in;

[0114] Fig.17 This application provides applicable Figure 1 A cross-sectional view of another quick clamping device of the electric tool;

[0115] Fig.18yes Fig.17 A partial enlarged view of the D area in the middle;

[0116] Fig.19 yes Fig.18 A partial enlarged view of the middle E area;

[0117] Fig. 20 This application provides applicable Figure 1 A cross-sectional view of another quick clamping device of the electric tool;

[0118] Fig.21a yes Fig. 20 A partial enlarged view of the middle F area;

[0119] Figure 21b yes Fig. 20 The plan view of the middle F area with the quick clamp unlocked;

[0120] Fig. 22 yes Fig. 20 A three-dimensional view of the second unlocking member in FIG.

[0121] Fig.23a yes Fig. 20 A position state diagram of the first unlocking member and the second unlocking member in the quick clamp locking state;

[0122] Figure 23b yes Fig. 20 A position state diagram of the first unlocking member and the second unlocking member in the quick-clip unlocking state;

[0123] Fig.24 yes Figure 1 A top view of the electric tool in a rotating state;

[0124] Fig.25 yes Fig.24 A three-dimensional diagram of a cleaning device in FIG.

[0125] Fig.26 yes Figure 1 A three-dimensional diagram of a portion of a rotating device and a portion of a cleaning device;

[0126] Fig.27a yes Fig.26 A position state diagram of the first locking member and the first matching portion in a rotationally locked state;

[0127] Figure 27b yes Fig.26 A position state diagram of the first locking member and the first matching portion in a rotationally unlocked state;

[0128] Fig.28a is a diagram of a meshing state of a portion of the first matching portion and a portion of the first locking member before rotation occurs;

[0129] Fig.28b is a relative position diagram of a portion of the first matching portion and a portion of the first locking member when rotation occurs;

[0130] Fig.28c is a relative position diagram of a portion of the first matching portion and a portion of the first locking member when the rotation continues;

[0131] Fig.28d is a diagram of a meshing state of a portion of the first matching portion and a portion of the first locking member after rotation;

[0132] Fig.29 Is applicable to Figure 1 Another plan view of a rotating device mounted to a cleaning device;

[0133] Fig.30 yes Fig.29 A cross-sectional view of a rotating device connected to a portion of a driving device and a cleaning device;

[0134] Fig.31 yes Fig.30 A partial enlarged view of the middle G area;

[0135] Fig.32 Is applicable to Figure 1 A perspective view of another rotating device mounted to a cleaning device;

[0136] Fig.33 yes Fig.32 A three-dimensional view of the third locking member and the mounting portion;

[0137] Fig.34 yes Fig.33 A plan view of a third locking member and a portion of a device housing;

[0138] Fig.35 yes Fig.33 A plan view of the installation portion;

[0139] Fig.36a yes Fig.35 A relative position diagram of a part of the third matching portion and a part of the third locking member before rotation occurs;

[0140] Fig.36b yes Fig.35 A relative position diagram of a part of the third matching portion and a part of the third locking member when rotation occurs;

[0141] Fig.36c yes Fig.35 Another relative position diagram of a part of the third matching portion and a part of the third locking member when rotation occurs;

[0142] Fig.36d yes Fig.35A diagram showing the relative positions of a portion of the third matching portion and a portion of the third locking member after rotation occurs;

[0143] Fig.37a is a three-dimensional diagram of a power tool provided in one embodiment of the present application;

[0144] Figure 37b yes Fig.37a A three-dimensional view of the electric tool after the second connecting device is removed;

[0145] Fig.38a yes Fig.37a A partial structural diagram of the third connecting device in FIG.

[0146] Figure 38b yes Fig.37a A partial structural diagram of the second connecting device in FIG.

[0147] Fig.38c yes Fig.37a A partial structural diagram of the first connecting device in FIG.

[0148] Fig.39 yes Fig.37a A perspective view of the first electrical plug assembly in FIG.

[0149] Fig.40 is a plan view of an electric tool provided in one embodiment of the present application;

[0150] Fig.41a yes Fig.40 A partial structural diagram of the electric tool after being disassembled including the second connecting device;

[0151] Fig.41b yes Fig.40 FIG. 1 is a partial structural diagram of the electric tool including the first connecting device after being disassembled. DETAILED DESCRIPTION

[0152] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0153] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0154] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0155] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0156] In this application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, etc. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0157] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0158] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0159] The present application is described in detail below in conjunction with the accompanying drawings and specific embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. The present application includes a variety of implementations. For the sake of brevity in description, the same or similar components or features in different implementations are denoted by the same or similar reference numerals. It should also be noted that the corresponding parts in different implementations can be applied to other implementations. In addition, for the sake of ease of description, only the parts related to the present application rather than all structures or steps are shown in the accompanying drawings.

[0160] Figure 1 The electric cleaning tool 1 shown is used for cleaning floors, walls, etc. Figure 1 and Figure 2 As shown, the electric tool 1 includes: a cleaning device 11, a driving device 12, an operating device 13, a connecting device 14 and a power supply device 15. Among them, the cleaning device 11, the driving device 12, the operating device 13, and the connecting device 14 can be regarded as a tool body 13a. In some embodiments, the weight of the tool body 13a is 1.5 kg to 3 kg, the length of the tool body 13a is 50 cm to 150 cm, and the center of gravity of the tool body 13a is located between the driving device 12 and the operating device 13.

[0161] The cleaning device 11 is used to install the working accessories 111 (see Figures 8a to 10 ) to achieve the cleaning function. The working attachment 111 can be a brush, a scouring pad, or other cleaning components. In order to facilitate the description of the technical solution of this application, the following is also defined: Figure 1 The upper side, lower side, front side, rear side, left side and right side of the cleaning device 11, wherein the driving device 12 is arranged on the upper side of the cleaning device 11, and the cleaning device 11 is arranged on the lower side of the driving device 12, and the front-to-back direction is perpendicular to the up-down direction and the left-to-right direction.

[0162] The driving device 12 is used to provide rotational power to the cleaning device 11. Figure 2As shown, the driving device 12 includes a motor 121 and a device housing 122. The motor 121 is disposed in the device housing 122. The motor 121 includes a motor shaft 1211 that rotates about the first straight line 101 as an axis, and drives at least one working accessory 111 of the cleaning device 11 to rotate. In some embodiments, the rotation speed of the motor 121 is 12,000 to 25,000 revolutions per minute, and the rotation speed of the working accessory 111 driven by the motor 121 is 250 to 600 revolutions per minute. In some embodiments, the driving device 12 also includes a transmission assembly 123. The transmission assembly 123 is used to transmit the torque of the motor 121 to the working accessory 111 to rotate the working accessory 111. The transmission assembly 123 can be a planetary gear set, and the transmission assembly 123 can also be disposed in the device housing 122. In some embodiments, in order to enhance the waterproof performance of the driving device, as shown in FIG. Figure 2 As shown, the device housing 122 includes a first device housing 1221 and a second device housing 1222. The first device housing 1221 is used to accommodate the motor 121, and the second device housing 1222 is used to accommodate the transmission assembly 123. The first device housing 1221 and the second device housing 1222 are provided with a waterproof sealing gasket (not shown in the figure) at the connection interface.

[0163] The operating device 13 includes a main handle 131, an auxiliary handle 132, and a switch assembly 133. The main handle 131 is used for the user to hold. The switch assembly 133 can control the start and stop of the drive device 12. The switch assembly 133 can be set on the main handle 131. When the user holds the main handle 131, he can directly operate the switch assembly 133 to control the power tool 1 to clean. The switch assembly 133 can also include a speed control switch (not shown in the figure) for adjusting the speed of the motor 121. The speed control switch may or may not include a circuit board with speed control logic. The auxiliary handle 132 is used to cooperate with the main handle 131 so that the user can hold the main handle 131 and the auxiliary handle 132 with both hands respectively, so that the power tool 1 can be operated more stably. The auxiliary handle 132 can be Figure 1 The annular auxiliary handle 132 shown, or Figure 3 The U-shaped auxiliary handle 132a shown. In some embodiments, as Figure 4As shown, the operating device 13 can also be provided with an auxiliary grip portion 134 to replace the auxiliary handle 132. The auxiliary grip portion 134 can be provided on the surface of the connecting device 14. The surface of the auxiliary grip portion 134 can be provided with notches or bumps to increase the friction of the user's palm. Specifically, the auxiliary grip portion 134 can be provided at the position where the auxiliary handle 132 is installed on the connecting device 14. In some embodiments, the operating device 13 also includes a switch shield (not shown in the figure) for shielding the switch assembly 133 to prevent the switch assembly 133 from being immersed in dust or being sprayed with liquid during cleaning. In other embodiments, the operating device 13 may also include a hanging portion (not shown in the figure) for allowing the user to hang the power tool 1.

[0164] like Figure 4 As shown, the connection device 14 includes a connection rod 141 for connecting the power supply device 15 and the device housing 122. The connection rod 141 extends in the direction of the second straight line 102. In some embodiments, the connection device 14 also includes a hinge assembly 142, the hinge assembly 142 connects the connection rod 141 and the device housing 122, and the hinge assembly 142 allows the connection rod 141 to rotate within a preset angle range with the third straight line 103 as the rotation axis. In some embodiments, the connection device 14 also includes a telescopic rod (not shown in the figure), the telescopic rod includes an extended state and a retracted state, and the ratio of the length of the telescopic rod in the retracted state to the length of the telescopic rod in the extended state is 0.4 to 0.8.

[0165] The power supply device 15 may include a power supply housing 151 and a battery pack 152 capable of providing a DC power supply to the motor 121. Optionally, the voltage of the battery pack 152 may be one of 12V, 18V, 24V, 36V, 40V, 56V, and 80V. In other embodiments, the power supply device 15 may also include a rectifier module (not shown in the figure) capable of converting AC power into DC power, thereby allowing the power tool 1 to be connected to the AC power of the mains. The power supply housing 151 is used to form a storage compartment 1510 for accommodating the power supply device 15. For example, the storage compartment 1510 can accommodate one or more battery packs 152 to power the power tool 1. The storage compartment 1510 can prevent the battery pack 152 from being sprayed with liquid during cleaning. Figure 4 As shown, the storage compartment 1510 includes a first compartment body 1511 and a second compartment body 1512. The first compartment body 1511 is used to form a cavity for accommodating the battery pack 152. The first compartment body 1511 has an opening for allowing the battery pack 152 to enter the cavity, and the second compartment body 1512 is used to cover the opening. In some embodiments, the storage compartment 1510 is disposed below the operating device 13, and specifically, the second compartment body 1512 is disposed below the main handle 131.

[0166] The power housing 151 and the auxiliary handle 132 can be mounted to the connecting rod 141. The auxiliary handle 132 or the auxiliary grip 134 can be mounted between the device housing 122 and the power housing 151. In other embodiments, the power housing 151 can also form a coupling portion (not shown in the figure) for coupling with the power supply device 15, for example, the coupling portion can be plugged and coupled with a battery pack 152 to power the power tool 1. The battery pack 152 can enter the accommodating compartment 1510 or be plugged with the coupling portion along a first direction F, and the first direction F is parallel to or inclined with the second straight line 102. In this embodiment, the main handle 131 and the power housing 151 are formed separately. It can be understood that in some other embodiments, the main handle 131 can also be integrally formed with the power housing 151. In some embodiments, the switch assembly 133 can be arranged on the upper surface of the power housing 151 to reduce the occupied space, thereby facilitating the miniaturization design of the power tool 1.

[0167] In some embodiments, the power housing 151 is disposed behind the main handle 131, that is, the main handle 131 is disposed between the power housing 151 and the connecting rod 141, or the main handle 131 is disposed between the power housing 151 and the auxiliary handle 132 or the auxiliary grip 134. This structural arrangement will cause the gravity borne by the power housing 151 to generate a downward force on the connecting device 14 when the user is cleaning the floor, and the user needs to apply an upward force to the main handle 131 in order to lift the connecting device 14. According to the lever principle, in order to reduce the force applied by the user's palm to the main handle 131, the power housing 151 can be set forward, that is, in a direction close to the drive device 12. Figure 1 and Figure 4 As shown, the present application provides a technical solution. In this embodiment, the power supply housing 151 is arranged between the main handle 131 and the driving device 12, and specifically can be arranged between the main handle 131 and the auxiliary handle 132 or the auxiliary gripping portion 134, thereby reducing the force applied by the user's palm to the main handle 131 and alleviating the user's fatigue when operating the power tool 1.

[0168] When a user uses a power tool such as a cleaning brush to clean the floor, the user applies a forward or backward force parallel to the floor to the handle to push the cleaning brush forward or backward to clean the floor. In some embodiments, the main handle 131 is set to a straight handle structure (not shown in the figure), and the straight handle structure is usually parallel to the extension direction of the connecting rod 141, and the extension direction of the connecting rod 141 is inclined to the horizontal plane. Therefore, the main handle set to a straight handle structure will cause the direction of the force applied by the palm of the user when cleaning the floor to be inconsistent with the movement direction of the power tool, causing the user's palm to bear a lot of resistance, which can easily cause palm fatigue after long-term work, and it is difficult for the user to continue working for a long time.

[0169] like Figures 5 and 6As shown, the main handle 131 includes a first grip portion 1311 and a second grip portion 1312, wherein the first grip portion 1311 is disposed at one end of the main handle 131 facing the power supply housing 151, and the second grip portion 1312 is disposed at one end of the main handle 131 away from the power supply housing 151, wherein the first grip portion 1311 extends in the direction of the second straight line 102, and the extension direction of the second grip portion 1312 is inclined with respect to the second straight line 102. Optionally, the second grip portion 1312 extends in the direction of the fourth straight line 104, and the fourth straight line 104 is inclined with respect to the second straight line 102, and the fourth straight line 104 may be parallel to or inclined with respect to the ground. Specifically, the angle α between the fourth straight line 104 and the second straight line 102 is 5° to 50°, for example, α may be 15°, 30° or 45°. In the present application, the user can hold the second grip portion 1312 when cleaning the floor, and the extension direction of the second grip portion 1312 is basically parallel to the floor, so that the direction of the force applied by the user's palm can be basically consistent with the movement direction of the power tool 1, thereby reducing the fatigue of the user's palm.

[0170] like Figure 7 As shown, in the front-to-back direction, the maximum distance between the cleaning device 11 and the first straight line 101 is L1, and the maximum distance L1 may be the distance between the outermost shell of the cleaning device 11 in the front-to-back direction and the first straight line 101. The distance between the third straight line 103 and the first straight line 101 is L2, and the distance L2 may be the sum of the radius of the outer diameter of the shell of the hinge assembly 142 and the radius of the outer diameter of the shell of the device shell 122. In some embodiments, L1 is greater than or equal to L2, so that when the user rotates the connecting rod 141, the cleaning device 11 can provide a larger supporting force to prevent the electric tool 1 from tipping over. In some embodiments, the minimum distance between the cleaning device 11 and the third straight line 103 in the up-down direction is H1, and the minimum distance H1 may be the distance between the uppermost shell of the cleaning device 11 and the third straight line 103. Optionally, H1 may be 10 mm to 100 mm to prevent the user from interfering with the cleaning device 11 when rotating the connecting rod 141.

[0171] In some embodiments, the power tool 1 may further include a lighting device (not shown in the figure) for providing a supplementary light source. Specifically, the lighting device may be connected to the drive device 12 or the connecting rod 141. In some embodiments, the power tool 1 may further include a water absorbing device (not shown in the figure) for absorbing liquid, such as cleaning waste water remaining on the ground. In some embodiments, the power tool 1 may further include a liquid discharge device (not shown in the figure) for discharging cleaning liquid or clean water. For example, the liquid discharge device can drip cleaning liquid to assist in cleaning oil stains on the ground, or the liquid discharge device can spray clean water to flush the ground. In some embodiments, the power tool 1 may further include an external hanging device (not shown in the figure) for mounting an external water pipe to flush the ground.

[0172] like Figure 8a and 8b As shown, the present application provides a cleaning device 11, including a working accessory 111 and a mounting frame 112. The working accessory 111 is mounted on the mounting frame 112, and the mounting frame 112 can be detachably mounted with the device housing 122. In this embodiment, the working accessory 111 is a brush, and in other embodiments, the working accessory 111 can also be a cleaning component such as a scouring pad, which is not limited in the present application.

[0173] In order to reduce the blind spots of the cleaning device 11 during cleaning, in some embodiments, on a projection plane perpendicular to the first straight line 101, the projections of the cleaning areas of two adjacent working attachments 111 during rotation have overlapping areas. In order to maximize the area of ​​the cleaning area of ​​the cleaning device 11, in some embodiments, on a projection plane perpendicular to the first straight line 101, a portion of the projection of the cleaning area of ​​the working attachment 111 during rotation exceeds the boundary of the projection of the mounting frame 112.

[0174] The working attachment 111 can be divided into a first cleaning attachment 1111 and a second cleaning attachment 1112. The first cleaning attachment 1111 is configured to be driven by the driving device 12 to rotate with the first straight line 101 as the axis, and the second cleaning attachment 1112 is configured to be driven to rotate by the rotating first cleaning attachment 1111 or other second cleaning attachments 1112, and the rotation axis of the second cleaning attachment 1112 is parallel to the first straight line 101. The first cleaning attachment 1111 rotates in a first rotation direction X, and the second cleaning attachment 1112 rotates in a second rotation direction Y, or part of the second cleaning attachment 1112 rotates in the first rotation direction X, wherein the first rotation direction X is opposite to the second rotation direction Y. For example, the first rotation direction X is clockwise, or the second rotation direction Y is clockwise.

[0175] like Figure 8a and 8b As shown, the first cleaning attachment 1111 can be arranged side by side with the second cleaning attachment 1112. Specifically, the mounting frame 112 can be rectangular or track-shaped. The working attachment 111 includes a first cleaning attachment 1111 and a plurality of second cleaning attachments 1112, and the plurality of second cleaning attachments 1112 are symmetrically arranged with the first cleaning attachment 1111 as the center. A portion of the second cleaning attachments 1112 rotates in the first rotation direction X, and another portion of the second cleaning attachments 1112 rotates in the second rotation direction Y, and the number of the second cleaning attachments 1112 rotating in the second rotation direction Y and the second cleaning attachments 1112 rotating in the first rotation direction X are equal. The radius of the first cleaning attachment 1111 is R1, and the radius of the second cleaning attachment 1112 is R2. Optionally, R1 and R2 can be 20 mm to 75 mm. In this embodiment, R1 can be equal to R2.

[0176] like Figure 9a and 9b As shown, the present application also provides a cleaning device 11a, whose mounting frame 112a is generally triangular in shape. In other embodiments, the mounting frame 112a may also be circular. In the cleaning device 11a, all second cleaning attachments 1112a are arranged to surround the first cleaning attachment 1111a. The cleaning device 11a includes a first cleaning attachment 1111a and a plurality of second cleaning attachments 1112a, and the first cleaning attachment 1111a is located at the geometric center of a figure surrounded by a plurality of second cleaning attachments 1112a, and the figure may be a triangle or a circle. The first cleaning attachment 1111a rotates in a first rotation direction X, and all second cleaning attachments 1112a rotate in a second rotation direction Y. The radius of the first cleaning attachment 1111 is R11, and the radius of the second cleaning attachment 1112a is R21. Optionally, R11 and R21 may be 20 mm to 75 mm. In this embodiment, R11 may be greater than or equal to R21. In some embodiments, R11=N*R21, where the value of N is equal to the number of second cleaning attachments 1112a.

[0177] like Figure 8a and 8b As shown, the working attachment 111 includes a brush plate 1113 and bristles 1114, the brush plate 1113 is mounted on the mounting frame 112, and the bristles 1114 are mounted on the lower surface of the brush plate 1113. In order to maximize the area of ​​the cleaning area of ​​the cleaning device 11, in some embodiments, on the projection plane perpendicular to the first straight line 101, the projection of part of the bristles 1114 is located outside the projection area of ​​the brush plate 1113. In some embodiments, the ratio of the area of ​​the area where the bristles 1114 are installed to the total area of ​​the lower surface of the brush plate 1113 ranges from 50% to 95%. In some embodiments, the ratio of the height of the bristles 1114 to the diameter D1 of the lower surface of the brush plate 1113 ranges from 25% to 50%.

[0178] like Fig.10As shown, in order to reduce the dead angle of the cleaning device 11 during cleaning, in some embodiments, the lower surface of the brush plate 1113 includes a first area 1113a, a second area 1113b and a third area 1113c. The first area 1113a is arranged in the central area of ​​the brush plate 1113, and the bristles 1114 installed in the first area 1113a extend obliquely in a direction toward the center of the brush plate 1113. The second area 1113b is arranged outside the first area 1113a, and the extension direction of the bristles 1114 installed in the second area 1113b is parallel to the first straight line 101. The third area 1113c is arranged outside the second area 1113b, and the bristles 1114 installed in the third area 1113c extend obliquely in a direction away from the center of the brush plate 1113. As a result, the bristles 1114 installed in the third area 1113c of the adjacent working attachments 111 will cross, so that the cleaning areas of the two adjacent working attachments 111 have overlapping areas when rotating.

[0179] like Figures 11a to 23b As shown, the present application also provides a cleaning power tool 1 including a quick clamp device 16, which is installed in a device housing 122 and can detachably connect the cleaning device to the drive device. Thus, the user can disassemble and replace the cleaning device during work, for example, Figure 8a The cleaning device 11 shown is replaced by Figure 9a The cleaning device 11a shown can be used to adapt to changing cleaning needs or replace a new cleaning device after the old cleaning device is damaged. The quick clamp device provided in the present application allows the user to replace the cleaning device with one hand.

[0180] like Figures 11a to 16 As shown, the present application provides a first quick clamping device 16. The cleaning device 11 includes a mounting portion 113 for detachably connecting with the quick clamping device 16. The mounting portion 113 is mounted on the upper surface of the mounting frame 112. The mounting portion 113 can be integrally formed with the mounting frame 112 or fixed by welding.

[0181] The quick clamp device 16 includes a quick clamp locking state and a quick clamp unlocking state. In the quick clamp locking state, the quick clamp device 16 is connected to the cleaning device 11 and limits the movement of the cleaning device 11 in the direction of the first straight line 101. In the quick clamp unlocking state, the quick clamp device 16 can be separated from the cleaning device 11 and allows the cleaning device 11 to move in the direction of the first straight line 101.

[0182] like Figures 12 to 15As shown, the quick clamp device 16 includes a limiter 161 for limiting the displacement of the mounting portion 113 in the direction of the first straight line 101. In the quick clamp locked state, the limiter 161 is connected to the mounting portion 113 and limits the movement of the mounting portion 113 in the direction of the first straight line 101. In the quick clamp unlocked state, the limiter 161 is separated from the mounting portion and can allow the mounting portion 113 to move in the direction of the first straight line 101.

[0183] Specifically, the mounting portion 113 includes a limiting groove 1130, and the limiting member 161 may be a sphere, and at least a portion of the limiting member 161 can enter the limiting groove 1130. In the fast clamp locking state, the limiting member 161 enters the limiting groove 1130 and limits the mounting portion 113 from moving in the direction of the first straight line 101. In the fast clamp unlocking state, the limiting member 161 can leave the limiting groove 1130, and the limiting member 161 is separated from the mounting portion 113, so that the mounting portion 113 can be allowed to move in the direction of the first straight line 101.

[0184] like Figures 13 to 16 As shown, the quick clamping device 16 also includes an unlocking component 162, which can move the limiting member 161 so that the limiting member 161 is connected to the mounting portion 113 or separated from the mounting portion 113. Specifically, the unlocking component 162 includes a first unlocking member 1621 and a first elastic component 1623. The first unlocking member 1621 can abut against the limiting member 161 so that the limiting member 161 is connected to the mounting portion 113. The first unlocking member 1621 can be set as a part of the inner wall surface of the device housing 122. The movement of the first unlocking member 1621 in the direction of the first straight line 101 can drive the limiting member 161 to enter or allow the limiting member 161 to leave the limiting groove 1130, thereby allowing the limiting member 161 to be connected to or separated from the mounting portion 113. The first elastic component 1623 can press the first unlocking member 1621 downward along the direction of the first straight line 101 so that the first unlocking member 1621 abuts against the limiting member 161. Specifically, as Fig.16 As shown, the first elastic component 1623 includes a first elastic member 16231 and a middle member 16232. The first elastic member 16231 may be a spring, and the middle member 16232 may be an annular member, such as a gasket. The first elastic member 16231 is disposed above the middle member 16232, and the middle member 16232 is disposed above the first unlocking member 1621. The middle member 16232 presses the first unlocking member 1621 under the force of the first elastic member 16231.

[0185] like Fig.14As shown, in the quick-clip locking state, the first elastic component 1623 applies a downward force to the first unlocking member 1621 in the direction of the first straight line 101, driving the first unlocking member 1621 to press the limiting member 161 into the limiting groove 1130 to clamp the mounting portion 113, thereby limiting the movement of the mounting portion 113 in the direction of the first straight line 101. At this time, if a downward force is applied to the device housing 122 in the direction of the first straight line 101, the device housing 122 can drive the first unlocking member 1621 to move downward in the direction of the first straight line 101, that is, to provide a moving space for the limiting member 161 to leave the limiting groove 1130. The first unlocking member 1621 moves downward in the direction of the first straight line 101 to the position shown in FIG. Fig.15 In the position shown, the limiting member 161 can gradually leave the limiting groove 1130 under the action of the inclined surface of a part of the inner wall of the limiting groove 1130 .

[0186] like Fig.15 As shown, in the quick-clip unlocking state, the limit member 161 completely leaves the limit groove 1130, the limit member 161 is separated from the mounting portion 113, and the mounting portion 113 is no longer stuck in the device housing 122, thereby allowing the user to operate the mounting portion 113 to move in the direction of the first straight line 101 with one hand.

[0187] like Figures 17 to 19 As shown, the present application provides a second quick-clamp device 16b. When an upward force along the first straight line 101b is applied to the device housing 122b, the quick-clamp device 16b switches from a quick-clamp locking state to a quick-clamp unlocking state.

[0188] In this embodiment, the first unlocking member 1621b includes an abutment portion 16211. The abutment portion 16211 may be provided as a portion of the inner wall surface of the device housing 122b protruding toward the first straight line 101b. Fig.17 and Fig.18 As shown, in the quick-clip locking state, the first elastic component 1623b applies a downward force to the abutting portion 16211 in the direction of the first straight line 101b, driving the abutting portion 16211 to press the limiting member 161b into the limiting groove 1130b to clamp the mounting portion 113b, thereby limiting the movement of the mounting portion 113b in the direction of the first straight line 101b. At this time, if an upward force is applied to the device housing 122b along the direction of the first straight line 101b, and this force is sufficient to overcome the downward force applied by the first elastic component 1623b to the abutting portion 16211, the device housing 122b can drive the abutting portion 16211 to move upward along the direction of the first straight line 101b. When the abutting portion 16211 moves to a position where it no longer presses the limiting member 161b, the limiting member 161b can leave the limiting groove 1130b and fall below the abutting portion 16211, and the quick-clip device enters as shown. Fig.19In the quick-clip unlocked state, the limiting member 161b leaves the limiting groove 1130b, the limiting member 161b is separated from the mounting portion 113b, and the mounting portion 113b is no longer stuck in the device housing 122b, thereby allowing the user to operate the mounting portion 113b to move in the first straight line 201 direction.

[0189] like Figure 20 to Figure 23b As shown, the present application provides a third type of quick clamping device 16c. In this embodiment, the quick clamping device 16c includes: Fig. 22 The second unlocking member 1622c shown in FIG. The movement of the second unlocking member 1622c in a direction perpendicular to the first straight line 101c can push the first unlocking member 1621c to move in the direction of the first straight line 101c.

[0190] The first unlocking member 1621c is provided as an independent object from the device housing 122c. The first unlocking member 1621c is provided with a step surface, on which the downward force F1 applied by the first elastic component 1623c in the direction of the first straight line 101c can be supported. The second unlocking member 1622c can be as follows: Fig. 22 In the button shown, the second unlocking member 1622c abuts against the first unlocking member 1621c, and the abutting contact surface of the second unlocking member 1622c and the first unlocking member 1621c includes an inclined surface 3622a.

[0191] like Fig.21a and Fig.23a As shown, in the quick-clamp locking state, the first unlocking member 1621c is subjected to the downward force F1 applied by the first elastic component 1623c in the direction of the first straight line 101c, one end of the first unlocking member 1621c abuts against the inclined surface 3622a of the second unlocking member 1622c, and the other end abuts against the limiting member 161c so that at least part of the limiting member 161c enters the limiting groove 1130c.

[0192] like Figure 21b and Figure 23bAs shown, in the quick-clip unlocking state, the second unlocking member 1622c is subjected to the action of force F2, which may be a force applied by a user, and the direction of force F2 is in a direction perpendicular to the first straight line 101c and toward the limiting member 161c. Under the action of force F2, the second unlocking member 1622c moves toward the limiting member 161c in a direction perpendicular to the first straight line 101c, and the inclined surface 16221 pushes the first unlocking member 1621c to move in a direction away from the limiting member 161c. When the first unlocking member 1621c is away from the limiting member 161c, if the user moves the cleaning device 11c downward, the limiting groove 1130c moves downward in the direction of the first straight line 101c, and the wall surface of the limiting groove 1130c in contact with the limiting member 161c can push the limiting member 161c to move in a direction perpendicular to the first straight line 101c and away from the limiting groove 1130c. When the limiting member 161c completely leaves the limiting groove 1130c, at least a portion of the limiting member 161c is located below the first unlocking member 1621c.

[0193] like Figure 24 to Figure 28d As shown, the electric tool 1 also includes a rotating device 17. The rotating device 17 is disposed in the device housing 122 and can connect the cleaning device 11 and the driving device 12. The rotating device 17 includes a rotation locking state and a rotation unlocking state. In the rotation locking state, the rotating device 17 prohibits the cleaning device 11 from rotating. In the rotation unlocking state, the rotating device 17 can allow the cleaning device 11 to rotate with the first straight line 101 as the rotation axis. Thus, the user can rotate the cleaning device 11 to a desired angle in the rotation unlocking state. When the user is working, the rotating device 17 switches to the rotation locking state to meet the work requirements.

[0194] like Fig.26 As shown, in some embodiments, the rotating device 17 includes a first locking member 171 and a second elastic member 174. The cleaning device 11 includes a first matching portion 114, and the first matching portion 114 can be engaged with at least a portion of the first locking member 171. Optionally, the first matching portion 114 can be arranged on the upper surface of the mounting portion 113, that is, the upper surface of the mounting portion 113 facing the driving device 12 is arranged in an uneven toothed disk shape. The lower surface of the first locking member 171 facing the cleaning device 11 is arranged in a toothed disk shape that can be engaged with the first matching portion 114. The second elastic member 174 can be a spring, and the second elastic member 174 can press the first locking member 171 downward along the direction of the first straight line 101 so that the first locking member 171 is engaged with the first matching portion 114. The first locking member 171 can be set as an annular structure, the upper surface of the first locking member 171 contacting the second elastic member 174 can be set as a plane, and the lower surface of the first locking member 171 meshing with the first matching portion 114 can be set as an uneven toothed disc shape.

[0195] like Figure 27b As shown, the user stops the cleaning work, and the cleaning device 11 no longer bears the reaction force F4 of the ground facing the cleaning device 11, and the rotating device 17 is switched to the rotation unlocked state. After the force F4 is removed, the first matching portion 114 can move downward a certain distance in the direction of the first straight line 101 under the action of gravity G. The first locking member 171 will also move downward in the direction of the first straight line 101 under the action of the downward force F3 in the direction of the first straight line 101 applied by the second elastic member 174, and a gap is generated between the first locking member 171 and the device housing 122 in the direction of the first straight line 101, and the first locking member 171 and the first matching portion 114 can be disengaged. At this time, if the user applies a rotational force F5 to the first matching portion 114, the teeth meshing with the first matching portion 114 and the first locking member 171 will produce relative displacement. For the specific displacement process, please refer to Figures 28a to 28d As shown. During the displacement process, the first locking member 171 will move upward in the direction of the first straight line 101 due to the inclined surface between the teeth. If the minimum distance S of the gap between the first locking member 171 and the device housing 122 in the direction of the first straight line 101 is less than the tooth depth H of the first matching portion 114 and the first locking member 171, the teeth of the first matching portion 114 will not be able to move to another position, and the relative displacement of the first locking member 171 and the first matching portion 114 will stop. Therefore, in this embodiment, the minimum distance S of the gap between the first locking member 171 and the device housing 122 in the direction of the first straight line 101 is greater than or equal to the tooth depth H of the first matching portion 114 and the first locking member 171, so that the first locking member 171 can move upward in the direction of the first straight line 101.

[0196] When the cleaning device 11 completes one rotation, the teeth of the first matching portion 114 and the first locking member 171 are in a new relative meshing position, and the rotating device 17 is still in a rotation unlocking state. If the user is not satisfied with the rotation angle of the cleaning device 11, the user can rotate the cleaning device 11 again to make the teeth of the first matching portion 114 and the first locking member 171 in another new relative meshing position. When the user uses the power tool 1 to clean the floor, the cleaning device 11 is subjected to the reaction force F4 of the floor on the cleaning device 11. Under the action of the force F4, the cleaning device 11 moves upward along the direction of the first straight line 101 to a preset position, that is, the state when the first locking member 171 is tightly against a part of the inner wall of the device housing 122. At this time, the cleaning device 11 is between the ground and the first locking member 171, and there is a lack of movement gap or movement distance in the direction of the first straight line 101. The teeth of the first matching portion 114 and the first locking member 171 cannot complete relative displacement, that is, the rotating device 17 switches from a rotational unlocking state to a rotational locking state, and the cleaning device 11 cannot complete rotation under the action of the reaction force F4 of the ground.

[0197] like Fig.27a As shown, in the rotation locking state, the upper surface of the first locking member 171 is subjected to the downward force F3 applied by the second elastic member 174 in the direction of the first straight line 101, and the lower surface of the first locking member 171 is meshed with the upper surface of the first matching portion 114 under the action of the force F3. At this time, if the user uses the electric tool 1 to clean the floor, the cleaning device 11 is subjected to the reaction force F4 of the ground surface on the cleaning device 11, that is, the first matching portion 114 is subjected to the upward force F4 in the direction of the first straight line 101. Therefore, under the action of the forces F3 and F4, the first locking member 171 is tightly meshed with the first matching portion 114. At the same time, due to the action of the force F4, the first locking member 171 and the first matching portion 114 in the meshing state will move upward in the direction of the first straight line 101 until the first locking member 171 is blocked by a part of the inner wall of the device housing 122, and the first locking member 171 is tightly against a part of the inner wall of the device housing 122. At this time, the first locking member 171 and the first matching portion 114 cannot continue to move upward along the direction of the first straight line 101. In summary, in the rotationally locked state, along the direction of the first straight line 101, the cleaning device 11 is between the ground and the first locking member 171, and the first locking member 171 and the first matching portion 114 cannot complete a complete rotation due to the lack of sufficient movement clearance or movement distance. Figures 28a to 28d The movement shown is such that the user cannot rotate the cleaning device 11 when the rotating device 17 is in the rotationally locked state. Figures 28a to 28d It is a schematic diagram of a process in which relative displacement occurs between teeth of the first matching portion 114 and the first locking member 171 when the cleaning device 11 rotates. Fig.28a FIG. 1 shows the relative positions of the first matching portion 114 and the first locking member 171 before the cleaning device 11 rotates. Fig.28b and Fig.28c FIG. 1 shows the relative positions of a portion of the first matching portion 114 and a portion of the first locking member 171 when the cleaning device 11 rotates. Fig.28d The figure shows the relative positions of the first matching portion 114 and the first locking member 171 after the cleaning device 11 rotates. The first locking member 171 includes a first locking tooth 1711 and a second locking tooth 1712 , and the first matching portion 114 includes a first matching tooth 1141 and a second matching tooth 1142 .

[0198] like Fig.28a As shown, the first matching portion 114 and the first locking member 171 are in meshing state, the first locking tooth 1711 is located between the first matching tooth 1141 and the second matching tooth 1142, and the second matching tooth 1142 is located between the first locking tooth 1711 and the second locking tooth 1712. Fig.28b As shown, when the cleaning device 11 starts to rotate, the first matching portion 114 and the first locking member 171 gradually separate. Fig.28cAs shown, the first matching portion 114 and the first locking member 171 are completely separated, the first locking tooth 1711 leaves the gap between the first matching tooth 1141 and the second matching tooth 1142, and the second matching tooth 1142 leaves the gap between the first locking tooth 1711 and the second locking tooth 1712. The cleaning device 11 continues to rotate, the second locking tooth 1712 moves toward the gap between the first matching tooth 1141 and the second matching tooth 1142, and the first matching tooth 1141 begins to enter the gap between the first locking tooth 1711 and the second locking tooth 1712. Fig.28d As shown, after the cleaning device 11 completes one rotation, the second locking tooth 1712 is located between the first matching tooth 1141 and the second matching tooth 1142 , and the first matching tooth 1141 is located between the first locking tooth 1711 and the second locking tooth 1712 .

[0199] like Figure 29 to Figure 31 As shown, the present application provides a second rotating device 17d. The rotating device 17d includes a second locking member 172d, and the second locking member 172d is arranged at the lower end of the device housing 122d facing the cleaning device 11d. The cleaning device 11d includes a second matching portion 115d, and the second matching portion 115d can be snap-connected with at least part of the second locking member 172d. The second matching portion 115d is arranged at the position where the mounting frame 112d is connected to the mounting portion 113d. Optionally, the second locking member 172d includes a protrusion 1721d, and the second matching portion 115d includes a groove portion 1150d that matches the shape of the protrusion 1721d. For example, the second locking member 172d includes two protrusions 1721d, and the second matching portion 115d includes a plurality of symmetrically arranged groove portions 1150d. In the rotationally locked state, the second matching portion 115d is snap-connected with the second locking member 172d, that is, the protrusion 1721d is inserted into the groove 1150d, so that the cleaning device 11d is difficult to rotate. In the rotationally unlocked state, the second matching portion 115d is disengaged from the second locking member 172d, that is, the protrusion 1721d can leave the groove 1150d, so that the cleaning device 11d can rotate, for example, the protrusion 1721d can leave a pair of grooves 1150d and then be inserted into another pair of grooves 1150d.

[0200] If the user uses an electric tool to clean the floor, the cleaning device 11d is subjected to the reaction force of the ground on the cleaning device 11d, and the mounting frame 112d and the mounting portion 113d drive the second matching portion 115d to move upward relative to the device housing 122d along the direction of the first straight line 101d, so that at least part of the protrusion 1721d of the second locking member 172d enters the groove portion 1150d, and the groove portion 1150d can thereby limit the movement of the second locking member 172d in the front, rear, left and right directions, that is, the rotating device 17d enters a rotationally locked state.

[0201] If the user stops using the power tool to clean the floor, the user no longer applies the force of pressing the floor to the cleaning device 11d through the device housing 122d, that is, the protrusion 1721d can leave the groove 1150d, and the rotating device 17d enters the rotation unlocking state. In the rotation unlocking state, after the protrusion 1721d leaves the pair of grooves 1150d, the cleaning device 11d can rotate, that is, the relative position of the second matching portion 115d and the second locking member 172d changes, and after the cleaning device 11d rotates a certain angle, the protrusion 1721d can be inserted into the other pair of grooves 1150d.

[0202] like Figure 32 to Figure 36d As shown, the present application provides a third rotating device 17e. The rotating device 17e includes a third locking member 173e, which is configured as a sphere. Optionally, the third locking member 173e can have the same structure as the limiting member 161 of the quick clamping device 16, that is, the limiting member 161 of the quick clamping device 16 can also serve as the third locking member 173e of the rotating device 17e. Figure 32 to Figure 33 As shown, the cleaning device 11e includes a third matching portion 116e, and the third matching portion 116e is arranged in the middle section of the mounting portion 113e. The third matching portion 116e includes a first groove 1161e and a plurality of second grooves 1162e, and the first groove 1161e and the plurality of second grooves 1162e are connected, and the second groove 1162e matches the size of the third locking member 173e. Optionally, the first groove 1161e can be the same structure as the limiting groove 1130 used to match the limiting member 161 of the quick clamping device 16, that is, the limiting groove 1130 can also serve as the first groove 1161e of the third matching portion 116e.

[0203] In the rotation locking state, if the user uses the electric tool to clean the floor, part of the inner wall of the device housing presses against the third locking member 173e, so that the third locking member 173e is accommodated in the second groove 1162e, and the third locking member 173e cannot leave the second groove 1162e due to being blocked by part of the inner wall of the device housing. In some embodiments, the part of the inner wall of the device housing that presses against the third locking member 173e can be the first unlocking member 1621b of the quick clamping device 16b, specifically, can be the abutment portion 16211.

[0204] In the rotation unlocking state, if the user stops the cleaning work, the cleaning device 11e will no longer bear the reaction force of the ground on the cleaning device 11e. After the force is removed, the mounting portion 113e can drive the third matching portion 116e to move downward along the first straight line 101e for a distance under the action of gravity G. At this time, the third locking member 173e leaves the second groove 1162e and can move in the first groove 1161e. After the cleaning device 11e rotates a certain angle, the third locking member 173e can stop at the position above the other second grooves 1162e in the first groove 1161e. At this time, if the cleaning device 11e is pressed by the device housing to bear the force of the ground, the cleaning device 11e will bear the upward force along the direction of the first straight line 101e, so that the third matching portion 116e moves upward, and the third locking member 173e moves from the first groove 1161e to the second groove 1162e under the joint action of part of the inner wall of the device housing and the third matching portion 116e.

[0205] Figures 36a to 36d It is a schematic diagram showing the process of the third locking member 173e moving in the third matching portion 116e when the cleaning device 11e rotates. Fig.36a FIG. 1 shows the relative positions of the single third locking member 173e and the third matching portion 116e before the cleaning device 11e rotates, that is, in the rotationally locked state. Fig.36b and Fig.36c FIG. 1 shows the relative positions of a portion of the third matching portion 116e and a single third locking member 173e when the cleaning device 11e rotates. Fig.36d The figure shows the relative positions of the part of the third matching portion 116e and the single third locking member 173e after the cleaning device 11e is rotated, ie in a new rotationally locked state.

[0206] like Fig.36a As shown in FIG. 1 , the rotating device 17e is in a rotationally locked state, and the third locking member 173e is accommodated in a second groove 1162e. When the cleaning device 11e starts to rotate, as shown in FIG. Fig.36b and Fig.36c As shown, the third locking member 173e first leaves the second groove 1162e and enters the first groove 1161e, and then moves in the first groove 1161e until it reaches the top of the other second groove 1162e. Fig.36d As shown, the rotating device 17e is switched to a new rotation locking state, and the third locking member 173e is accommodated in another second groove 1162e.

[0207] like Figures 37a to 39As shown, the present application provides a connecting device 44 that can be assembled and spliced. The connecting device 44 includes a first connecting device 4431 and a second connecting device 4432. One end of the first connecting device 4431 is connected to the driving device 42, and the other end is connected to the second connecting device 4432. One end of the second connecting device 4432 is connected to the first connecting device 4431, and the other end is connected to the operating device 43.

[0208] The connection device 44 further includes a first electrical plug assembly 444, and the first connection device 4431 and the second connection device 4432 are electrically connected through the first electrical plug assembly 444. The first electrical plug assembly 444 includes a first plug 4441 and a first socket 4442. When the first plug 4441 is inserted into the first socket 4442, the first electrical plug assembly 444 is in a conducting state, and the user can operate the driving device 42 through the switch assembly 433 of the operating device 43. When the first plug 4441 is pulled out of the first socket 4442, the first electrical plug assembly 444 is in a disconnected state. Optionally, the first plug 4441 is arranged at one end of the second connection device 4432, and the first socket 4442 is arranged at one end of the first connection device 4431 connected to the second connection device 4432, or the first plug 4441 is arranged at one end of the first connection device 4431, and the first socket 4442 is arranged at one end of the second connection device 4432 connected to the first connection device 4431.

[0209] In some embodiments, the connecting device 44 further includes a third connecting device 4433, which is detachably connected to the second connecting device 4432. One end of the third connecting device 4433 is connected to the second connecting device 4432, and the other end is connected to the main handle 431. The second connecting device 4432 is connected to the auxiliary handle 432.

[0210] The connecting device 44 also includes a second electrical plug assembly, and the third connecting device 4433 is electrically connected to the second connecting device 4432 through the second electrical plug assembly. The second electrical plug assembly includes a second plug and a second socket. When the second plug is inserted into the second socket, the second electrical plug assembly is in a conducting state, and the user can operate the driving device 42 through the switch assembly 433 of the operating device 43. When the second plug is pulled out of the second socket, the second electrical plug assembly is in a disconnected state. Optionally, the second plug is arranged at one end of the second connecting device, and the second socket is arranged at one end of the third connecting device 4433 connected to the second connecting device 4432, or the second plug is arranged at one end of the third connecting device 4433, and the second socket is arranged at one end of the second connecting device 4432 connected to the third connecting device 4433.

[0211] In some embodiments, the first connecting device 4431 includes a hinge assembly 442, the hinge assembly 442 is connected to the driving device 42, the second connecting device 4432 includes a portion of the connecting rod 441 and is connected to the auxiliary handle 432, and the third connecting device 4433 includes the remaining portion of the connecting rod 441 and is connected to the main handle 431 and the power supply housing 451. The power supply housing 451 is disposed between the main handle 431 and the second connecting device 4432, specifically, the power supply housing 451 is disposed between the main handle 431 and the auxiliary handle 432.

[0212] In some embodiments, the first electrical plug assembly 444 and the second electrical plug assembly are further provided with a sealing ring (not shown in the figure), such as an O-ring, to achieve waterproof and dustproof effects.

[0213] In this embodiment, the user can choose to remove the second connecting device 4432 and install the third connecting device 4433 connected to the power supply housing 451 together with the first connecting device 4431 connected to the driving device 42, so that Fig.37a The long connecting device 44 shown becomes as follows Figure 37b The short version of the connecting device 44 is shown. At the same time, to ensure the transmission of electrical signals and power, the second plug of the third connecting device 4433 can be electrically connected to the first socket 4442 of the first connecting device 4431, or the second socket of the third connecting device 4433 can be electrically connected to the first plug of the first connecting device 4431, so that the user can operate the driving device 42 through the switch assembly 433 of the operating device 43.

[0214] like Figure 40 to Figure 41b As shown, the present application provides another connecting device 54 that can be assembled and spliced. The connecting device 54 includes a first connecting device 5431 and a second connecting device 5432. The first connecting device 5431 includes a hinge assembly 542, and the hinge assembly 542 is connected to the driving device 52. The second connecting device 5432 includes a connecting rod 541 and connects the main handle 531 and the auxiliary handle 532. The first connecting device 5431 is connected to the power supply housing 551, and the power supply housing 551 is arranged between the hinge assembly 541 and the second connecting device 5432. Specifically, the power supply housing 551 is arranged between the hinge assembly 541 and the auxiliary handle 532. In this embodiment, the power tool 5 allows the user to continue to use it after removing the second connecting device 5432. In some embodiments, the first connecting device 5431 also includes a handle 546, one end of the handle 546 is connected to the hinge assembly 542, and the other end can be connected to the connecting rod 541. The handle 546 is disposed above the power supply housing 551 , and the user can hold the handle 546 to use the power tool 5 after removing the second connecting device 5432 .

[0215] The above shows and describes the basic principles, main features and advantages of the present application. Technicians in this industry should understand that the above embodiments do not limit the present application in any form, and all technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present application. It should also be noted that the corresponding parts in different implementation modes of the present application can be applied to other implementation modes, such as the quick clamping device 16, quick clamping device 16b, quick clamping device 16c, and rotating device 17, rotating device 17d, rotating device 17e provided in the present application. Under the premise that the technical solutions are not contradictory, the quick clamping device 16 can also be combined with the rotating device 17d or the rotating device 17e, which does not mean that the quick clamping device 16 can only be used with the rotating device 17.

Claims

1. An electric tool for cleaning, include: Cleaning equipment, including working accessories for cleaning; A driving device, comprising a motor for driving the working attachment to rotate, the motor comprising a motor shaft rotating about a first straight line; An operating device, used for a user to operate to control the electric tool; A power supply device, used to provide power to the driving device; A connecting device, used to connect the driving device and the operating device; Characterized in that the connecting device comprises: A first connecting device, connected to the driving device; a second connecting device, one end of which is connected to the first connecting device, and the other end of which is connected to the operating device; Wherein, the first connecting device and the second connecting device are detachably connected.

2. The electric tool according to claim 1, It is characterized in that The connecting device further comprises a first electrical plug assembly, and the first connecting device and the second connecting device are electrically connected via the first electrical plug assembly.

3. The electric tool according to claim 2, It is characterized in that The first electrical plug assembly comprises a first plug and a first socket, and the first electrical plug assembly is configured as follows: When the first plug is inserted into the first socket, the first electrical plug assembly is in a conducting state; When the first plug is pulled out of the first socket, the first electrical plug assembly is in a disconnected state.

4. The electric tool according to claim 3, It is characterized in that The first plug is arranged at one end of the first connecting device, and the first socket is arranged at one end of the second connecting device connected to the first connecting device; Alternatively, the first plug is arranged at one end of the second connecting device, and the first socket is arranged at one end of the first connecting device connected to the second connecting device.

5. The electric tool according to claim 1, It is characterized in that The power supply device comprises a power supply housing for accommodating a battery pack, and the power supply housing is connected to the first connecting device.

6. The electric tool according to claim 1, It is characterized in that The connecting device also includes a third connecting device, one end of which is connected to the second connecting device, and the third connecting device is detachably connected to the second connecting device; the operating device includes a main handle and an auxiliary handle, and the auxiliary handle is used to cooperate with the main handle to allow the user to hold the main handle and the auxiliary handle with both hands respectively; the main handle is connected to the third connecting device, and the auxiliary handle is connected to the second connecting device.

7. The electric tool according to claim 6, It is characterized in that The power supply device comprises a power supply housing for accommodating a battery pack, wherein the power supply housing is connected to the third connecting device and is disposed between the main handle and the auxiliary handle.

8. The electric tool according to claim 6, It is characterized in that The connecting device further comprises a second electrical plug assembly, and the third connecting device is electrically connected to the second connecting device via the second electrical plug assembly.

9. The electric tool according to claim 8, It is characterized in that The second electrical plug assembly comprises a second plug and a second socket, and the second electrical plug assembly is configured as follows: When the second plug is inserted into the second socket, the second electrical plug assembly is in a conducting state; When the second plug is pulled out of the second socket, the second electrical plug assembly is in a disconnected state.

10. The electric tool according to claim 9, It is characterized in that The second plug is arranged at one end of the second connecting device, and the second socket is arranged at one end of the third connecting device connected to the second connecting device; Alternatively, the second plug is arranged at one end of the third connecting device, and the second socket is arranged at one end of the second connecting device connected to the third connecting device.

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