Power tool

Abstract

The application discloses an electric tool, comprising: a main shell, a driving mechanism arranged in the main shell; a working head connected to one end of the main shell, wherein the working head rotates relative to the main shell around a first axis; the working head comprises an output shaft, the output shaft rotates around a second axis under the driving of the driving mechanism; a window part is arranged on the main shell or the working head, and the window part is used for displaying the internal structure of the electric tool. The electric tool can be applied to various working conditions, has high stability, is convenient to operate, has a display or indication function, is convenient for maintenance or replacement of the internal structure, and is convenient for realizing various functions.

Description

TECHNICAL FIELD

[0001] The present application relates to a tool, in particular to an electric tool. BACKGROUND

[0002] Electric tools include hand-held electric tools and bench-type electric tools. The hand-held electric tools are further divided into direct current type hand-held electric tools and alternating current type hand-held electric tools according to the required work, size, etc. With the increasing demand for manual DIY, the demand scenarios for small hand-held electric tools are also increasing. SUMMARY

[0003] To solve the problems in the prior art, the present application aims to provide a hand-held electric tool which is small in size, convenient to operate and has a display or indication function.

[0004] To achieve the above-mentioned objectives, the present application adopts the following technical solutions:

[0005] An electric tool comprises a main housing, a drive mechanism arranged in the main housing, and a working head connected to one end of the main housing, wherein the working head rotates relative to the main housing about a first axis, the working head comprises an output shaft which rotates about a second axis under the drive of the drive mechanism, and the main housing or the working head is provided with a window portion which is arranged to display the internal structure of the electric tool.

[0006] In some embodiments, the main housing comprises a holding portion and a connecting portion, the working head is connected to the connecting portion, and the window portion is formed in or connected to the connecting portion.

[0007] In some embodiments, the electric tool further comprises a connecting assembly connecting the output shaft and the drive mechanism.

[0008] In some embodiments, the connecting assembly is arranged at a position corresponding to the position of the window portion.

[0009] In some embodiments, the window portion is an opening.

[0010] In some embodiments, the window portion comprises a cover body made of transparent or translucent material.

[0011] In some embodiments, the main housing extends along a third axis, and the second axis rotates about the first axis to be arranged at a plurality of angular positions relative to the third axis.

[0012] In some embodiments, the connecting portion is formed with a first accommodating space, the working head is at least partially arranged in the first accommodating space, the working head comprises a moving portion connected to the output shaft, the moving portion is limited in the first accommodating space and can move relative to the connecting portion about the first axis.

[0013] In some embodiments, the connecting assembly comprises: a first connecting member, one end of which is connected to the driving mechanism and rotates under the driving of the driving mechanism; a second connecting member, one end of which is connected to the output shaft; and a third connecting member, which connects the first connecting member and the second connecting member and is movable relative to the first connecting member and the second connecting member to transmit the power output by the driving mechanism to the output shaft, the third connecting member being located in the middle of the window portion.

[0014] In some embodiments, the connecting assembly comprises: a first connecting member, one end of which is connected to the driving mechanism and rotates under the driving of the driving mechanism; a second connecting member, one end of which is connected to the output shaft; and an intermediate member, which connects the first connecting member and the second connecting member and is movable relative to the first connecting member and the second connecting member to transmit the power output by the driving mechanism to the output shaft, the intermediate member being located in the middle of the window portion.

[0015] In some embodiments, the driving mechanism comprises: a power supply assembly comprising a battery capable of energy storage; a motor; and a transmission assembly connecting the motor and the working head; wherein the rated voltage of the power supply assembly is less than or equal to 10V.

[0016] In some embodiments, the overall length of the power tool is less than or equal to 200mm.

[0017] In some embodiments, the ratio of the length of the power supply assembly to the maximum length of the power tool is less than or equal to 0.3 and greater than or equal to 0.15.

[0018] An electric power tool comprises: a main housing, a driving mechanism being arranged in the main housing; a working head connected to one end of the main housing, wherein the working head rotates relative to the main housing about a first axis; the working head comprises an output shaft, which rotates under the driving of the driving mechanism about a second axis; a connecting assembly configured to connect the output shaft and the driving mechanism; and a positioning assembly configured to position the rotational position of the working head and limit the working head to a plurality of set positions.

[0019] An electric power tool comprises: a main housing, a driving mechanism being arranged in the main housing, the driving mechanism comprising a battery for energy storage; a working head connected to one end of the main housing, wherein the working head rotates relative to the main housing about a first axis; the working head comprises an output shaft, which rotates under the driving of the driving mechanism about a second axis; and the ratio of the length of the battery to the maximum length of the power tool is less than or equal to 0.3 and greater than or equal to 0.15.

[0020] An electric power tool comprises: a main housing, a driving mechanism being arranged in the main housing, the driving mechanism comprising a battery for energy storage; a working head connected to one end of the main housing and rotating relative to the main housing about a first axis; the working head comprises an output shaft, which rotates under the driving of the driving mechanism about a second axis; and the working head comprises a moving portion connected to the main housing, the moving portion rotates relative to the main housing and can be limited to a plurality of set positions.

[0021] In some embodiments, the second axis has an angle with the main housing, and the several set positions correspond to different angle sizes.

[0022] The electric tool of the present application can be applied to various working conditions, has high stability, is convenient to operate, has a display or indication function, is convenient for maintenance or replacement of internal structures, and is convenient for realizing various functions. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a perspective view of the present application;

[0024] Figure 2 is a perspective view of the present application from another angle, wherein;

[0025] Figure 3 is a schematic view of the internal structure of the present application;

[0026] Figure 4 is a cross-sectional schematic view of the present application;

[0027] Figure 5 is an exploded schematic view of the internal structure of the present application;

[0028] Figure 6 is an exploded schematic view of the internal structure of the present application from another angle;

[0029] Figure 7 is a partial schematic view of another embodiment of the present application. EMBODIMENTS

[0030] In order to make the above objectives, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0031] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The present application will be described below with reference to the accompanying drawings and specific embodiments.

[0034] To clearly illustrate the technical solution of this application, the following are also defined: Figure 1 The top, bottom, left, right, front, and back sides are shown.

[0035] like Figures 1-6 As shown, the power tool 1 includes a working head 10, a main housing 20, and a drive mechanism 30. The working head 10 can directly output power or connect to other working accessories to output power. Depending on the working method or power output of the working head 10, the power tool 1 can be a corresponding tool, such as a screwdriver, drill, wrench, etc. The working head 10 is connected to one end of the main housing 20 and rotates relative to the main housing 20 around a first axis 101 under the action of external force. The working head 10 is connected to the drive mechanism 30 and outputs power under the action of the drive mechanism 30.

[0036] The working head 10 includes an output shaft 11, which rotates around a second axis 102 under the drive of the drive mechanism 30. In this embodiment, a screwdriver is used as an example. The end of the output shaft 11 is also formed with a mounting groove 111 for mounting different bits.

[0037] The main housing 20 extends along the length of the third axis 103. The main housing 20 includes a gripping portion 22 and a connecting portion 21. The connecting portion 21 is formed or connected to one end of the gripping portion 22, and is configured to connect to the working head 10. The connecting portion 21 has a first receiving space, and the gripping portion 22 has a second receiving space; the first and second receiving spaces communicate with each other. The drive mechanism 30 is mostly located within the second space formed by the gripping portion 22.

[0038] The working head 10 also includes a moving part 12, which is connected to the main housing 20 and rotates relative to the main housing 20 about a second axis 102. The moving part 12 is movably connected to the connecting part 21 or disposed in the first receiving space. In this embodiment, the working head 10 also includes an output shaft housing 13, which wraps around the outer periphery of the output shaft 11 and is connected to or integrally formed with the moving part 12.

[0039] The connecting portion 21 is provided with a rotating groove 211, from which the output shaft 11 extends, and the moving part 12 is confined within the rotating groove 211. The connecting portion 21 includes an arc-shaped or near-arc-shaped guide portion, along which the working head 10 moves. In some embodiments, the rotating groove 211 can be a closed groove forming a space for placing the moving part 12. In some embodiments, the rotating groove 211 can also be an open groove with a limiting portion that restricts the movement of the moving part 12, forming an open limiting groove within the first receiving space. The output shaft 11 extends from the rotating groove 211, and the outer diameter of the end of the output shaft 11 connected to the moving part 12 is approximately equal to the width of the rotating groove, allowing this end to engage with the rotating groove 211. The rotating groove 211 is located on the periphery of the connecting portion 21 (i.e., on one side surrounding the first axis 101). In this embodiment, the periphery of the connecting portion 21 is a curved surface, and the moving part 12 has a curved surface with a shape corresponding to the periphery of the connecting portion. The surface of the moving part 12 is in contact with the inner surface of the connecting part 21, so that the moving part 12 can move along the rotating groove 211 on the connecting part 21.

[0040] like Figures 1-2 As shown, the rotating groove 211 has a certain length, corresponding to the rotational stroke of the working head 10 about the first axis 101 relative to the main housing 20. It can be understood that the length of the arc swept by the rotating working head is the aforementioned rotational stroke, and the angle of this arc is α, which is greater than or equal to 0° and less than or equal to 90°. In some embodiments, α is greater than or equal to 0° and less than or equal to 60°. In some embodiments, α is greater than or equal to 0° and less than or equal to 30°. In some embodiments, α is greater than or equal to 0° and less than or equal to 16°.

[0041] like Figures 3-4 As shown, the drive mechanism 30 is disposed within the main housing 20 along the third axis 103. In this embodiment, the drive mechanism 30 is disposed within the second receiving space or at least mostly disposed within the second receiving space. The drive mechanism 30 includes a power supply assembly 33, a motor 32, and a transmission assembly 31. The transmission assembly 31, the motor 32, and the power supply assembly 33 are connected sequentially from top to bottom.

[0042] In the present embodiment, the power supply assembly 33 is a battery housed inside the bottom of the handle portion 22. In order to increase the power storage capacity of the power supply assembly 33 and thus increase the working life, the power supply assembly 33 increases the width of the handle portion 22 at the corresponding position. The end of the main housing 20 can be provided with a charging port, and the power supply assembly 33 is electrically connected to the charger socket at the lower end of the handle portion 22. In some embodiments, the power supply assembly 33 is a rechargeable battery that can be removed from the handle portion 22. The power supply assembly 33 can also be a mains power supply, an alternating current power supply, or a combination of a mains power supply and a battery pack, cooperating with a corresponding rectification, filtering and voltage regulation circuit to achieve power supply.

[0043] The motor 32 is electrically connected to the power supply assembly 33, and the power supply assembly 33 provides power output to the motor 32. In the present embodiment, the nominal voltage of the power supply assembly 33 is less than or equal to 10V. In some embodiments, the nominal voltage is less than or equal to 6V. In the present embodiment, taking a handheld electric screwdriver as an example, the nominal voltage is 4-5V, and the power supply assembly 33 is a battery. In some embodiments, it can be a universal detachable replacement battery or a universal detachable rechargeable battery.

[0044] The length L1 of the power supply assembly 33 is greater than or equal to 30mm and less than or equal to 50mm. It should be noted that the length of each component of the drive mechanism 30 refers to the length in the direction of the third axis 103.

[0045] The electric tool 1 has a total length L, which refers to the length of the main housing 20. The total length L is less than or equal to 200mm. In some embodiments, the total length L of the electric tool 1 is less than or equal to 190mm. In some embodiments, the total length L of the electric tool 1 is less than or equal to 180mm. The ratio of the length L1 of the power supply assembly 33 to the total length L is greater than or equal to 0.15 and less than or equal to 0.3.

[0046] The transmission assembly 31 is configured to transmit the power output by the motor 32 to the output shaft 11. The transmission assembly 31 is arranged between the output shaft 11 and the motor 32, and at least part or all of the transmission assembly 31 is arranged in the handle portion 22 and can be arranged at least partially in the connecting portion 21. In the present embodiment, the transmission assembly 31 adopts planetary gear reduction. The transmission assembly 31 includes a planetary gear set 311 and a gear box housing 312. The planetary gear set 311 includes one, two or more stages of planetary gears. The inside of the gear box housing 312 is provided with an internal tooth structure. Because the working principle of planetary gear reduction and the increase in torque generated by such a transmission assembly are well known to those skilled in the art, detailed description is omitted here for the sake of brevity of the specification.

[0047] In some embodiments, the length of the power supply assembly 33 is less than the length of the transmission assembly 31.

[0048] AsFigures 3-6 As shown, the power tool 1 further comprises a connecting assembly 50. The connecting assembly 50 connects the transmission assembly 31 and the output shaft 11, and is configured to transmit the movement around the third axis 103 to the output shaft 11 so as to rotate the output shaft 11 around the second axis 102. The second axis 102 and the third axis 103 can coincide, or form an angle after the output shaft 11 rotates around the first axis 101, which is the angle a of the rotation arc of the working head.

[0049] In the embodiment, the connecting assembly 50 comprises a first connecting member 51, a second connecting member 52 and an intermediate member 53. The first connecting member 51 is connected to the transmission assembly 31 at one end and rotates under the driving of the driving mechanism 30. The second connecting member 52 is connected to the output shaft 11 at one end and connected to the intermediate member 53 at the other end. The intermediate member 53 moves relative to the first connecting member 51 and the second connecting member 52 to transmit the power output by the driving mechanism 30 to the output shaft 11. The first connecting member 51 and the second connecting member 52 are similar in structure, and one of them is described below. The first connecting member 51 and the second connecting member 52 are provided with a protruding connecting arm 54 at one end, which comprises two connecting arm units arranged on both sides of the intermediate member 53, and the connecting arm 54 is connected to the intermediate member 53 through a rotating shaft 55. The first connecting member 51 and the second connecting member 52 can rotate relative to the intermediate member around the rotating shaft 55. The two rotating shafts 55 are arranged vertically. Exemplarily, the intermediate member 53 can be a cube or a sphere, which saves space.

[0050] The first connecting member 51, the intermediate member 53 and the second connecting member 52 constitute a universal joint mechanism.

[0051] The intermediate member 53 is configured to display a logo or a special shape of the product, or configured to display the shape of the product, or configured to display product information, such as indicating the rotation angle of the output shaft 11 around the first axis 101 or indicating the rotation speed of the output shaft 11. In some embodiments, the intermediate member 53 is provided with a state display unit, which comprises a liquid crystal display / LED display screen, a buzzer, an LED component or other components with prompting function, and is configured to display or prompt the state when the power tool is in an abnormal working state or low power. The prompting mode is different according to the definition and demand of the product. It can be understood that the prompting mode has been fully disclosed to those skilled in the art.

[0052] The main housing 20 is provided with a window portion 14, which is configured to display the internal structure of the power tool 1. Further, the window portion 14 can be understood as a perspective component. In the embodiment, the window portion 14 includes a window groove 212 formed on the main housing 20 and a cover 141 arranged on the window groove 212. The cover 141 is composed of transparent or translucent material, so that the user can observe the internal structure of the power tool 1. In the embodiment, the window portion 14 is arranged on the connecting portion 21, and the position of the window portion 14 is opposite to the position of the connecting assembly 50, so that part of the structure of the connecting assembly 50 is displayed in the window portion. The position of the window portion 14 is opposite to the position of the intermediate piece 53, so that the intermediate piece 53 is displayed in the window portion, and the display or indication function described above is completed. Since the output shaft housing 13 extends to the position of the connecting assembly 50, the output shaft housing 13 is provided with a first through hole 131 corresponding to the window portion 14. The diameter of the first through hole 131 is greater than the diameter of the window groove 212.

[0053] In other alternative embodiments, the window portion is integrally formed with the main housing 20, and the transparent or translucent window portion is integrally formed with the main housing 20 by in-mold injection or the like, i.e., the window portion is not detachable. In some embodiments, in order to facilitate manufacturing and increase the gorgeous effect, the main housing is arranged as a whole window portion, i.e., the main housing is formed as a whole transparent or translucent structure.

[0054] In the embodiment, the cover 141 includes a protruding central portion 1411 and a recessed peripheral portion 1412, i.e., the central portion 1411 and the peripheral portion 1412 have a height difference and are not in the same plane, the peripheral portion 1412 is arranged inside the window groove 212, and the central portion 1411 is clamped in the window groove 212 and protrudes therefrom to achieve sealing of the main housing 20.

[0055] In other embodiments, the window portion 14 is an opening without a cover. In other embodiments, the cover 141 of the window portion 14 is provided with a display unit, and the display unit includes an LCD / LED display screen.

[0056] On the other hand, by arranging the window portion with a detachable cover, when the connecting assembly 50 is damaged, it can be conveniently replaced.

[0057] In other embodiments, the window portion 14 is arranged on the working head 10, and at this time, the working head 10 is formed with a housing similar to the connecting portion 21, or the moving portion thereof is a housing similar to the connecting portion 21.

[0058] As Figures 1-3As shown, the power tool 1 also includes an operating component and a controller. The operating component includes a main switch 171 and a switching operating component. The main switch 171 is configured to control the start and stop of the motor 32. The switching operating component is configured to switch the forward and reverse rotation states of the motor 32. The main switch 171 is located at the junction of the grip portion 22 and the connecting portion 21. In this embodiment, the main switch 171 is located on the side adjacent to the window portion 14. In this embodiment, the switching operating component is combined with the main switch. The main switch 171 and the switching operating component are located on the side opposite to the direction of the rotating groove 211, meaning that the main switch 171 and the switching operating component are operated by the operator's thumb most of the time when being operated. This facilitates operation of the switches during use.

[0059] The controller is mounted on the control circuit board 16. The control circuit board 16 includes a printed circuit board (PCB) and a flexible printed circuit board (FPC). The controller uses a dedicated control chip, such as a microcontroller or microcontroller unit (MCU).

[0060] The operating element is connected to the corresponding switch. The switch is electrically connected to the controller. The controller responds to different signals emitted by the switch, instructing the motor to perform corresponding control actions.

[0061] like Figures 4-6 As shown, the power tool 1 also includes a positioning assembly 40, which is configured to position the tool head 10 about the rotational position relative to the main housing 20 about the first axis 101. The positioning assembly 40 is disposed between the moving part 12 and the connecting part 21, coupling the moving part 12 and the connecting part 21 so that the tool head 10 stops at a set position.

[0062] The positioning assembly 40 comprises a base 41, a positioning pin 42 and a plurality of positioning slots 43. The plurality of positioning slots 43 are arranged on the inner side of the connecting portion 21. In the present embodiment, the outer side of the connecting portion 21, i.e. the side that can be observed by the user, is provided with a plurality of angle indicators. The number of angle indicators is the same as the number of positioning slots 43. The base 41 is arranged on the tool head 10. In the present embodiment, the base 41 is arranged on the moving portion 12. The base 41 extends along the first axis 101. The positioning pin 42 connects the moving portion 12 and the connecting portion 21. One end of the positioning pin 42 is connected to the base 41, and the other end is connected to the positioning slots 43 in a clutching manner. The positioning pin 42 can move within the base 41 relative to the moving portion 12. The movement of the positioning pin 42 is caused by the rotation of the tool head 10 about the first axis 101. The shapes of the plurality of positioning slots 43 correspond to the positioning pin 42. When the positioning slots 43 are connected to the positioning pin 42, the positioning of the tool head 10 is completed. Each positioning slot 43 corresponds to a different rotation angle of the tool head 10.

[0063] When the tool head 10 is rotated from one angle to another angle, the positioning pin 42 moves into the base 41 corresponding to a certain positioning slot 43, and then moves from the base 41 to another positioning slot 43. In the present embodiment, the positioning pin 42 comprises a rolling ball 421 and an extension member 422. When the tool head 10 is rotated, the rolling ball 421 moves in the slot between adjacent positioning slots 43 and is pressed by the slot wall, and the rolling ball 421 biases the extension member 422. When the rolling ball 421 enters a positioning slot 43, the extension member 422 supports the rolling ball 421, so that the rolling ball 421 is kept in the positioning slot 43.

[0064] The electric power tool 1 further comprises a lighting assembly 15. The lighting assembly 15 is arranged on the control circuit board 16. The control circuit board 16 is electrically connected to the driving mechanism 30, and the control circuit board 16 is arranged in the holding portion 22 and is parallel or substantially parallel to the driving mechanism 30 or the third axis 103. Substantially parallel means that the included angle between the control circuit board 16 and the driving mechanism 30 or the third axis 103 is less than or equal to 10°.

[0065] In another embodiment of the present application, as shown in Figure 7 In another embodiment of the present application, as shown in

[0066] In the embodiment, the electric tool 2 comprises a connecting assembly 70 comprising a first connecting member 71, a second connecting member 72 and a third connecting member 73. The first connecting member 71 is connected to the transmission assembly 31 at one end and rotates under the drive of the driving mechanism 30. The other end of the first connecting member 71 is connected to the third connecting member 73. The second connecting member 72 is connected to the output shaft 11 at one end, and the other end of the second connecting member 72 is connected to the third connecting member 73. The first connecting member 71 and the second connecting member 72 are provided with protruding connecting arms at one end and are in a cylindrical or columnar shape at the other end. The third connecting member 73 is provided with protruding first and second connecting arms 732 and 733 at both ends. The first and second connecting members 71 and 72 and the third connecting member 73 are respectively provided with first and second intermediate members 74 and 75.

[0067] The third connecting member 73 is provided in a shape of a display product, or the third connecting member 73 can be provided to display product information, such as indicating the rotation angle of the output shaft 11 around the first axis 101, indicating the rotation speed of the output shaft 11, etc. The third connecting member 73 further comprises a bogie 731 connecting the first and second claw parts 732 and 733 and allowing relative movement between the first and second claw parts 732 and 733. In the embodiment, the first connecting member 71, the first intermediate member 74 and the first claw part 732 constitute a first universal joint mechanism. The second connecting member 72, the second intermediate member 75 and the second claw part 733 constitute a second universal joint mechanism. The fourth connecting member is arranged inside the bogie 731 and connects the first and second universal joint mechanisms, and at this time, the first and second universal joint mechanisms have relative movement between them.

[0068] The bogie 731 is externally provided in a logo or special shape of a display product, or can be provided to display product information, such as indicating the rotation angle of the output shaft 11 around the first axis 101, indicating the rotation speed of the output shaft 11. In some embodiments, a state display unit is arranged on the outside of the bogie 731, and the display unit comprises an LCD / LED display screen, a buzzer, a light-emitting diode component or other components with prompting function, and is arranged to display or prompt the state when the electric tool appears an abnormal working state or low power. The prompting mode is different according to the product definition and different needs. It can be understood that the prompting mode has been fully disclosed to those skilled in the art.

[0069] The third connecting member 73 is detachably connected to the first and second connecting members 71 and 72, and the third connecting member 73 can be detached and replaced. Using multiple universal joint mechanisms for transmission can increase the range of α without reducing the speed of transmission to the output shaft.

[0070] The electric tool of the application can be applied to various working conditions, has high stability, is convenient to operate, has a display or indication function, is convenient for maintenance or replacement of the internal structure, and is convenient for realizing various functions.

[0071] The basic principles, main features and advantages of the application are shown and described above. Those skilled in the art should understand that the above examples do not limit the application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the application.

Claims

1. An electric tool, comprising: Main housing, wherein a drive mechanism is provided inside the main housing; A working head is connected to one end of the main housing, wherein the working head rotates relative to the main housing about a first axis; the working head includes an output shaft, which rotates about a second axis under the drive of the drive mechanism; A connecting component is configured to connect the output shaft and the drive mechanism; The main housing or the working head is provided with a window, which is configured to display the internal structure of the power tool. The working head is provided with a first through hole corresponding to the window. The connecting component is also configured to display the product's logo or special shape or indicate the working status. The connecting component is configured to be observable through the window.

2. The power tool according to claim 1, characterized in that, The main housing includes a gripping part and a connecting part, the working head is connected to the connecting part, and the window part is formed or connected to the connecting part.

3. The power tool according to claim 1, characterized in that, The window portion is an opening.

4. The power tool according to claim 1, characterized in that, The window portion includes a cover made of transparent or semi-transparent material.

5. The power tool according to claim 2, characterized in that, The main housing extends along a third axis, and the second axis rotates about the first axis to be positioned at multiple angular locations relative to the third axis.

6. The power tool according to claim 2, characterized in that, The connecting portion forms a first receiving space, and the working head is at least partially disposed within the first receiving space. The working head includes a moving portion connected to the output shaft. The moving portion is confined within the first receiving space and is capable of moving relative to the connecting portion about a first axis.

7. The power tool according to claim 1, characterized in that, The connection component includes: The first connector is connected to the drive mechanism at one end and rotates under the drive of the drive mechanism; The second connector is connected at one end to the output shaft; A third connector connects the first and second connectors and is movable relative to the first and second connectors to transmit the power output by the drive mechanism to the output shaft. The third connector is located in the middle of the window portion.

8. The power tool according to claim 1, characterized in that, The connection component includes: The first connector is connected to the drive mechanism at one end and rotates under the drive of the drive mechanism; The second connector is connected at one end to the output shaft; An intermediate component connects the first connector and the second connector, and is movable relative to the first connector and the second connector to transmit the power output by the drive mechanism to the output shaft. The intermediate component is located in the middle of the window portion.

9. The power tool according to claim 1, characterized in that, The drive mechanism includes: Power supply components, including batteries capable of storing energy; Electric motor; A transmission assembly connects the motor and the working head; The rated voltage of the power supply component is less than or equal to 10V.

10. The power tool according to claim 9, characterized in that, The overall length of the power tool is less than or equal to 200mm.

11. The power tool according to claim 10, characterized in that, The ratio of the length of the power supply component to the maximum length of the entire power tool is less than or equal to 0.3 and greater than or equal to 0.

15.

12. An electric tool, comprising: Main housing, wherein a drive mechanism is provided inside the main housing; A working head is connected to one end of the main housing, wherein the working head rotates relative to the main housing about a first axis; the working head includes an output shaft, which rotates about a second axis under the drive of the drive mechanism; A connecting component is configured to connect the output shaft and the drive mechanism; the connecting component is also configured to display the product's logo or special design or indicate its operating status. A positioning component, wherein the positioning component is configured to position the rotational position of the working head and limit it to a number of predetermined positions; The main housing is provided with a window, which includes a cover made of transparent or translucent material, and the connecting assembly is configured to be observable through the window.

13. An electric tool, comprising: The main housing contains a drive mechanism, which includes a battery for energy storage. A working head is connected to one end of the main housing, wherein the working head rotates relative to the main housing about a first axis; the working head includes an output shaft, which rotates about a second axis under the drive of the drive mechanism; A connecting component is configured to connect the output shaft and the drive mechanism; The ratio of the length of the battery to the maximum length of the entire power tool is less than or equal to 0.3 and greater than or equal to 0.15; the main housing or the working head is provided with a window, and the connecting component displays the product's logo or special shape or indicates the working status through the window.

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