Handle part and power tool using the same

Abstract

The utility model relates to a handle part and electric tool applying it, handle part includes: the rear cover that provides internal space for two carbon brushes, including the carbon brush isolation part with recess in the middle, carbon brush isolation part is used for separating two carbon brushes with the part of trigger in the rear cover, carbon brush isolation part includes middle part, the edge department of being located middle part both sides and the connecting part of connecting two edge department and middle part, the slot of carbon brush isolation part is towards the space of carbon brush, two edge department of carbon brush isolation part is located the slot outside part of recess, since two edge department of carbon brush isolation part protrude towards carbon brush relative middle part, make two edge department of carbon brush isolation part and the inner bottom surface of corresponding part of trigger in the rear cover together constitute the movable expansion space of trigger. The handle part of the utility model is narrow on both sides and wide up and down, compared with the traditional barrel shape, reduce the size of handle part, accord with ergonomics.

Description

Technical Field

[0001] This utility model relates to the field of power tools, and in particular to a handle and a power tool using the same. Background Technology

[0002] Power tools are tools that are driven by an electric motor or electromagnet and use a transmission mechanism to perform tasks.

[0003] A power tool is provided, comprising a housing containing a brushed motor, and a barrel-shaped rear cover on the rear end of the housing for the operator to hold. A trigger is mounted on the rear cover so that the operator can drive the brushed motor during operation, and the brushed motor, through a power transmission mechanism, drives the tool to perform processing operations on the workpiece.

[0004] When using the aforementioned power tools to process workpieces, the operator needs to hold the rear cover and operate the trigger simultaneously. However, the cylindrical structure of the rear cover increases the difficulty for the operator to use the aforementioned power tools, thereby reducing the convenience for the operator when using the aforementioned power tools. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a handle and an electric tool using the same.

[0006] The technical solution to achieve the purpose of this utility model is as follows: In a first aspect, this utility model provides a handle portion having an ergonomic structure with a wide vertical distance and a narrow lateral distance. The handle portion is suitable for power tools, which include a trigger and two carbon brushes arranged vertically. The handle portion includes: A rear cover providing internal space for the two carbon brushes includes a carbon brush isolation section with a groove in the middle. The carbon brush isolation section is used to separate the two carbon brushes from the trigger portion inside the rear cover. The carbon brush isolation section includes a middle portion, side portions located on both sides of the middle portion, and a connecting portion connecting the two side portions to the middle portion. The groove of the carbon brush isolation section faces the space where the carbon brushes are located. The two side portions of the carbon brush isolation section are located outside the groove of the groove. Since the two side portions of the carbon brush isolation section protrude towards the carbon brushes relative to the middle portion, the two side portions of the carbon brush isolation section and the inner bottom surface of the corresponding trigger portion inside the rear cover together constitute the expanded space for the movement of the trigger.

[0007] In some embodiments, the carbon brush isolation portion is located below the two carbon brushes, and the two sides of the carbon brush isolation portion extend to connect with the lower inner wall of the rear cover.

[0008] Secondly, this utility model provides an electric tool, which includes: The housing used to define the internal space of the power tool includes the handle portion described in the first aspect; The power source is located inside the housing; A power transmission mechanism is disposed inside the housing and connected to the power source unit; A tool mounting section for installing tools, at least a portion of which is disposed within the housing and connected to the power transmission mechanism; A starting assembly, including a trigger, a portion of which is disposed within the housing; and A controller is disposed within the housing. The controller is connected to the starting component and the power source unit. The controller recognizes the operating signal of the starting component and sends control commands to the power source unit to start or stop the power source unit.

[0009] In some embodiments, the rear edge region of the housing has a first space and a power cable routing channel, wherein a portion of the space wall of the first space is used to assemble the controller and a portion of the power cable connected to the controller, and the other portion of the power cable extends along the channel path of the power cable routing channel. The housing has a second space for assembling a capacitor, wherein a capacitor wire is connected to the capacitor, and the second space is located below the first space, wherein the power cable and the capacitor wire are connected in parallel.

[0010] In some embodiments, the controller has a positioning part, and the housing has a positioning fit, the positioning part and the positioning fit are connected to each other to jointly form the position stabilization structure of the controller.

[0011] In some embodiments, the housing further includes a dust-proof portion, which together with the first space and the second space constitutes a sealed structure.

[0012] In some embodiments, the left side of the inner bottom of the housing has an insert groove with a buckle and the right side has a limiting groove. The left end of the trigger has an elastic buckle, and the left end of the trigger is inserted into the insert groove of the housing. There is a gap between the elastic buckle and the insert groove for the trigger to rotate. The right end of the trigger is engaged in the limiting groove of the housing.

[0013] In some embodiments, the starting assembly further includes a switch and a lever assembly rotatably mounted on the trigger, wherein the state of the switch controls the operation of the power source, the lever assembly includes a lever and a reset mechanism for the lever to reset after rotation, and a limiting portion is provided inside the housing near the lever assembly; When the power tool is not in operation, the lever presses against the limiting part to restrict the inward movement of the trigger, thereby preventing the trigger from turning inward to trigger the switch, and the power source is in the off state; When the power tool is in operation, the lever no longer presses against the limiting part, causing the trigger to rotate inward and trigger the switch, and the power source is in the start state.

[0014] In some embodiments, a reinforcement is embedded inside the trigger.

[0015] In some embodiments, the carbon brush isolation portion has an insulating layer on the face near the trigger, and the reinforcement is covered with an outer plastic layer.

[0016] The handle of this power tool is narrow on both sides and wide at the top and bottom. Compared with the traditional barrel shape, the handle size is reduced, conforming to ergonomics and reducing the difficulty for operators to use the power tool, thereby increasing the convenience of operation. To achieve the above handle structure, the two carbon brushes of this power tool are arranged vertically. The carbon brush isolation part of the rear cover of the handle adopts a design with a groove in the middle. Specifically, the two sides of the carbon brush isolation part protrude towards the carbon brushes relative to the middle part, so that the two sides of the carbon brush isolation part and the inner bottom surface of the corresponding trigger part in the rear cover together form an expanded movement space for the trigger. This expanded movement space is larger than the previous movement space, allowing the trigger to perform the action of opening or closing the switch within this expanded movement space. If the carbon brush isolation part of the rear cover of the handle does not adopt the design with a groove in the middle and adopts a traditional flat design, the trigger part can only expand the space outward, resulting in a significant increase in the size of the handle, which is not conducive to actual operation. At the same time, the relatively flat inner surface of the rear cover near the carbon brushes will accumulate carbon powder after long-term use, resulting in the risk of carbon powder overflow. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of a power tool provided in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an electric tool provided in one embodiment of the present invention; Figure 3 This is a partial cross-sectional view of a power tool provided in one embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the rear cover portion provided in one embodiment of the present invention; Figure 5 yes Figure 1 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the structure of a switch provided in one embodiment of the present invention; Figure 7 This is a schematic diagram of the disassembled trigger portion provided in one embodiment of the present invention; Figure 8 This is a structural disassembly diagram of the connection between the controller and the rear cover in one embodiment of the present invention; Figure 9 This is a schematic diagram of the controller portion provided in one embodiment of the present invention; Figure 10 This is a structural schematic diagram of the reinforcing member provided in one embodiment of the present invention. Detailed Implementation

[0018] The present embodiment will now be described in conjunction with the accompanying drawings. In each drawing, the same or equivalent parts are indicated by the same reference numerals. In the description of the embodiment, the description of the same or equivalent parts is omitted or simplified as appropriate.

[0019] This utility model provides an electric tool that solves the problem that when using the above-mentioned electric tool to process workpieces, the operator needs to hold the rear cover and operate the trigger at the same time. However, the barrel-shaped structure of the rear cover increases the difficulty for the operator to use the above-mentioned electric tool, thereby reducing the convenience of the operator when using the above-mentioned electric tool.

[0020] like Figure 1-2 As shown, in one embodiment, the present invention provides a power tool, which is a disc-shaped tool used to perform grinding or polishing operations on workpieces such as metal and wood. The power tool may be an angle grinder.

[0021] The power tool includes a housing 10, a power source 20, a power transmission mechanism 30, a tool mounting section 40, a starting assembly 50, and a controller 60.

[0022] The housing 10 is used to define the internal space of the power tool and serves as a protective component for the internal parts of the power tool. The housing 10 is mainly composed of a main body shell 101 and a rear cover 102, and the rear cover 102 constitutes the housing for housing the start-up assembly 50 and the controller 60. Based on the length direction of the housing 10, the tool mounting part 40 side of the housing 10 is referred to as the "front end side", and the opposite side is referred to as the "rear end side".

[0023] The length direction of the main body shell 101 is consistent with the length direction of the outer shell 10 and both are roughly cylindrical. The main body shell 101 constitutes the housing for housing the power source 20, the power transmission mechanism 30 and the tool mounting part 40. A portion of the rear end of the main body shell 101 together with the rear cover 102 constitutes the handle part 100. The operator can operate the power tool by gripping the handle part 100.

[0024] In some embodiments, the rear cover 102, as a major component of the handle portion 100, provides internal space for the assembly of the two carbon brushes of the motor and is located on the rear end side of the housing 10. The entire rear cover 102 adopts a half-and-half structure in a half-on-half configuration to reduce the space required for the trigger 502's movement. Since the two carbon brushes occupy a large space, the trigger 502 will also occupy a relatively large space in this direction. Therefore, the rear cover 102 adopts the following structure: like Figure 3 As shown, the rear cover 102 includes a carbon brush isolation portion 1021 with a groove in the middle. The carbon brush isolation portion 1021 is used to separate the two carbon brushes from the part where the trigger 502 is located inside the rear cover 102. The carbon brush isolation portion 1021 includes a middle portion 10211, side portions 10212 located on both sides of the middle portion 10211, and a connecting portion 10213 connecting the two side portions 10212 to the middle portion 10211. The groove 10214 of the carbon brush isolation portion 1021 faces the space where the carbon brushes are located, and the two side portions 10212 of the carbon brush isolation portion 1021 are located in the groove. On the outer side of the slot opening 10214, since the two sides 10212 of the carbon brush isolation part 1021 protrude toward the carbon brush relative to the middle part 10211, the two sides 10212 of the carbon brush isolation part 1021 and the inner bottom surface of the corresponding part of the rear cover 102 where the trigger 502 is located together form the expanded space for the movement of the trigger 502. Therefore, the handle part 100 of the power tool has an ergonomic structure with a wider vertical distance and a narrower lateral distance compared to existing angle grinders, making reasonable use of space and reducing the size of the grip part, including the trigger.

[0025] like Figure 3As shown, specifically, the entire rear cover 102 is divided into a left sub-rear cover 102a and a right sub-rear cover 102b. The carbon brush isolation part 1021 is located below the two carbon brushes. The carbon brush isolation part 1021 includes a left carbon brush isolation sub-part and a right carbon brush isolation sub-part. The left end of the left carbon brush isolation sub-part is connected to the lower left inner wall of the left sub-rear cover 102a, while the right end of the right carbon brush isolation sub-part is connected to the lower right inner wall of the right sub-rear cover 102b. The right end of the left carbon brush isolation sub-part overlaps with the left end of the right carbon brush isolation sub-part. The left side 10212a of the left carbon brush isolation sub-part and the right side 10212b of the right carbon brush isolation sub-part protrude toward the first carbon brush 201 relative to the right side 10211a and the left side 10211b of the right carbon brush isolation sub-part. This allows for a suitable space distance L1, within which the trigger 502 can perform the action of opening and closing the switch 501. If the left side 10212a of the left carbon brush isolator and the right side 10212b of the right carbon brush isolator do not protrude, but are at the same height as the right side 10211a and the left side 10211b of the right carbon brush isolator, a space distance L2 for the trigger 502 to move will be left. The space distance L2 is less than the space distance L1. If the space distance L2 increases to the size of the space distance L1, the size of the handle part 100 of the power tool will also increase accordingly, which does not conform to the ergonomic structure. Among them, the right side 10211a of the left carbon brush isolator and the left side 10211b of the right carbon brush isolator together constitute the middle part 10211, while the left side 10212a of the left carbon brush isolator and the right side 10212b of the right carbon brush isolator both belong to the side part 10212.

[0026] like Figures 3-4 As shown, the left side 10212a of the left carbon brush isolator, the right side 10212b of the right carbon brush isolator, the right side 10211a of the left carbon brush isolator, and the left side 10211b of the right carbon brush isolator gradually contract inward along the rear extension direction of the power tool to the first rear end 10215 and the second rear end 10216 of the carbon brush isolator 1021. The right side 10211a of the left carbon brush isolator, the left side 10211b of the right carbon brush isolator, the first rear end 10215 and the second rear end 10216 form an interlaced structure. These structures form a semi-enclosed safety isolation layer for the carbon brush.

[0027] like Figure 3 As shown, in one embodiment, the power source unit 20 includes a motor with two carbon brushes arranged vertically, wherein the first carbon brush 201 is located below the second carbon brush 202.

[0028] like Figure 1 As shown, the power transmission mechanism 30 is used to transmit power from the power source 20 to the tool (grinding wheel, etc.). This power transmission mechanism 30 is mainly composed of a gear set.

[0029] The tool mounting section 40 can be a spindle, which is connected to the power transmission mechanism 30. A detachable grinding wheel or other tool is mounted on the head end of the spindle. The tool mounted on the tool mounting section 40 is located on the front end side of the housing 10, and its axis of rotation is perpendicular to the axis of rotation of the power source section 20.

[0030] like Figure 1 , Figure 5 and Figure 7 As shown, the starting assembly 50 includes a switch 501, a trigger 502, and a lever assembly 503. The switch 501 is located on the path of the trigger 502's rotation. The switch 501 is electrically connected to the controller 60, and the controller 60 is communicatively connected to the power source unit 20. The lever assembly 503 is rotatably mounted on the trigger 502. The lever assembly 503 includes a lever 5031 and a reset mechanism 5032 for resetting the lever 5031 after rotation. The housing 10 has a limiting part 108 near the lever assembly 503.

[0031] like Figure 6 As shown, in some embodiments, the switch 501 is installed inside the rear cover 102, and the switch 501 has an upward-facing first insert 5011 and a second insert 5012.

[0032] like Figure 7 As shown, in some embodiments, the reset mechanism 5032 includes a rotating shaft 50321 and a spring 50322. The rotating shaft 50321 is mounted on the trigger 502, while the spring 50322 is connected to the rotating shaft 50321. The lever 5031 is connected to the spring 50322. After the operator operates the lever 5031 to a position, the spring 50322 provides a reset thrust for the lever 5031.

[0033] like Figure 1 , Figure 5 and Figure 7As shown, when the power tool is in a non-working state, the lever 5031, under the pushing force of the reset mechanism 5032, presses against the limit part 108 to restrict the trigger 502 from rotating inward, thereby preventing the trigger 502 from rotating inward to trigger the switch 501, and the power source unit 20 is in a closed state. When the power tool is in a working state, the lever 5031 no longer presses against the limit part 108, allowing the trigger 502 to rotate inward and trigger the switch 501, and the power source unit 20 is in a started state. The controller 60 recognizes the working signal of the starting component 50 (switch 501) and sends a control command to the power source unit 20 to start or stop the power source unit 20, thereby achieving the purpose of controlling the operation of the power source unit 20 by the state of the switch 501.

[0034] In one embodiment, the controller 60 is located above the switch 501, which is located slightly below the center of the power tool, and the button of the switch 501 is located in the area near the bottom of the main body housing 101. If the rear cover 102 adopts a traditional barrel structure, it requires a push-forward assembly process. Since the switch 501 is mounted on the main body shell 101, the inner surface of the bottom of the rear cover 102 must not interfere with the button during assembly. In other words, the inner surface of the rear cover 102 must not be higher than the installation clearance baseline. In this case: First, the area of ​​the rear cover 102 that is higher than the clearance baseline will not have an isolation surface between the carbon brush and the spring. This area must be empty, which is a major safety hazard for the power tool itself. Second, if the right side 10211a of the left carbon brush isolation sub-part, the left side 10211b of the right carbon brush isolation sub-part, the first rear end 10215, and the second rear end 10216 are kept at the same level, the trigger 502 part can only expand outward, which will significantly increase the size of the grip area, which is not conducive to actual operation. At the same time, the relatively flat inner surface of the rear cover 102 near the carbon brush will accumulate carbon powder after long-term use, thus creating a risk of carbon powder overflow.

[0035] like Figure 1 and Figure 8 As shown, in some embodiments, the rearward edge region of the main body shell 101 has a first space 103 and a power cable routing channel 104. A portion of the space wall of the first space 103 is used to assemble the controller 60 and a portion of the power cable connected to the controller 60. This portion of the power cable can be bent backward. The remaining portion of the power cable extends along the channel path of the power cable routing channel 104, which is groove-shaped. The power cable is fixed to the main body shell 101 by a pressure plate. Figure 1 As shown, the main body shell 101 has a second space 105 for assembling capacitors, wherein capacitor wires are connected to the capacitors, and the second space 105 is located below the first space 103.

[0036] like Figure 8 As shown, in some embodiments, the main body shell 101 has a first mounting portion 1022, a second mounting portion 1023, a third mounting portion 1024, and a fourth mounting portion 1025. The first mounting portion 1022, the second mounting portion 1023, the third mounting portion 1024, and the fourth mounting portion 1025 together constitute a first space 103. The lengths of the first mounting portion 1022 and the second mounting portion 1023 extend along the length direction of the shell 10, and both the first mounting portion 1022 and the second mounting portion 1023 have positioning grooves 107. The top surface heights of the third mounting portion 1024 and the fourth mounting portion 1025 are lower than the heights of the first mounting portion 1022 and the second mounting portion 1023.

[0037] In some embodiments, the main housing 101 also includes a dust-proof portion 106, which together with the first space 103 and the second space 105 constitutes a sealing structure, which can effectively reduce dust from entering the internal areas such as the controller 60.

[0038] like Figure 9 As shown, in some embodiments, the controller 60 has a first input terminal 601, a second input terminal 602, a first output terminal 603, and a second output terminal 604. The first input terminal 601 and the second input terminal 602 of the controller 60 are screw-type terminal blocks, while the first output terminal 603 and the second output terminal 604 are plug-in terminal blocks. The power supply line is connected in parallel with the capacitor line and is fixed inside the first input terminal 601 and the second input terminal 602 of the controller 60.

[0039] like Figure 8 and 9 As shown, in some embodiments, the controller 60 has a positioning part, and the main body shell 101 has a positioning mating part. The positioning part and the positioning mating part cooperate and connect with each other to jointly form a position stabilization structure for the controller 60. In one embodiment, the controller 60 has positioning ribs 605 and mounting holes 606 on both sides, and the main body shell 101 has a positioning groove 107. The cooperation between the positioning ribs 605 and the positioning groove 107 can achieve the positioning purpose of the controller 60, and the mounting hole 606 is used to mount the controller 60 on the main body shell 101.

[0040] like Figure 8 and Figure 9As shown, the power cord is bent backward, and the first output terminal 603 and the second output terminal 604 of the controller 60 are connected to the first insert 5011 and the second insert 5012 of the switch 501, and then screwed onto the main body housing 101. At this time, the positioning rib 605 on the controller 60 is inserted into the positioning groove 107 of the rear cover 102. When the power tool is working, it can prevent the controller 60 from shifting position due to vibration. At the same time, the staggered sealing structure and the dustproof part 106 on the main body housing 101 work together to effectively reduce dust entry.

[0041] The controller 60 is easy to install. Apart from the wiring from the output terminals of the switches 501 on both sides to the motor, all other wiring is inside the main body shell 101. There is no complicated wiring exposed outside the main body shell 101, which reduces the assembly intensity. At the same time, the left and right side walls of the mounting part where the controller 60 is located are flat and smooth, and the airflow entering the interior is rectified in the path, which optimizes the air duct and improves the air intake efficiency.

[0042] like Figure 1 As shown, in some embodiments, the inner bottom of the housing 10 has an insert groove 109 with a buckle on the left side and a limiting groove 1010 on the right side. The left end of the trigger 502 has an elastic buckle 5021. The left end of the trigger 502 is inserted into the insert groove 109 of the housing 10. There is a gap between the elastic buckle 5021 and the insert groove 109 for the trigger 502 to rotate. The right end of the trigger 502 is locked in the limiting groove 1010 of the housing 10.

[0043] In some embodiments, power tools with safety switches are subject to a safety rule requiring that when a force of 150N is applied to the most unfavorable position on the trigger, the deformation displacement of the contact surface on the trigger that contacts the switch button should not trigger the switch. Since this power tool uses a relatively long trigger, if the trigger material is merely engineering plastic, its rigidity is insufficient. Applying a force of 150N will inevitably cause the trigger to deform, thus triggering the switch. To solve this problem, the rigidity of the trigger must be strengthened. Currently, most power tools with safety switches and long triggers in the prior art adopt a two-stage design with an external reinforcing frame and a trigger. If the trigger is equipped with an external reinforcing frame, the power tool will occupy a larger space due to the frame, resulting in a larger grip size for the handle portion of the casing, suitable for low-power power tools, such as low-power angle grinders below 900W. If a two-stage trigger is used, the trigger portion needs to hold the rear lever, and the trigger part also needs sufficient rigidity, resulting in a larger trigger portion size, thus making the grip portion of the machine body slightly larger as well. Therefore, considering the shortcomings of the two trigger designs mentioned above, this power tool adopts a design based on a single long trigger, with a reinforcing member 70 embedded within the trigger 502, such as... Figure 1 and Figure 7As shown, the opening direction of the reinforcing member 70 on the trigger is consistent with the opening direction of the trigger. The spatial distance L3 between the inner bottom surface of the trigger and the right side 10211a and the left side 10211b of the left carbon brush isolator is equal to the spatial distance L1. This reasonably optimizes the space of the related structure of the trigger 502, thereby optimizing the size of the handle part 100.

[0044] like Figure 10 As shown, in some embodiments, the reinforcing member 70 has a first reinforcing rib 701 and a second reinforcing rib 703 on both sides and a convex part 702 in the middle. The first reinforcing rib 701, the second reinforcing rib 703, and the convex part 702 together constitute the three reinforcing parts of the reinforcing member 70, effectively improving the rigidity of the reinforcing member 70. After testing, even when a force of 230N is applied to the trigger 502 with the reinforcing member 70 embedded in it in the most unfavorable position, the switch 501 will not be triggered, exceeding the 150N specified by the safety standard, thus preventing the risk of accidental activation. The reinforcing member 70 also has a semi-circular groove 704 to make room for the pivot 50321 and a clearance hole 705 to make room for the lever 5031 and the spring 50322. There is a contact area between the trigger 502 and the switch 501. The reinforcing member 70 is optimized in that the extension of the length of the reinforcing member 70 ends at its rear end 0-10mm before the contact area between the trigger 502 and the switch 501. The reinforcement 70 ensures that the trigger 502 has sufficient rigidity while minimizing the length and weight of the reinforcement 70.

[0045] In some embodiments, the carbon brush isolation portion 1021 has an insulating layer on the face near the trigger 502, and the outer plastic layer of the reinforcement forms a double layer of insulation for the carbon brush.

[0046] This power tool can be a high-power short handle with a controller 60. Considering that the main body shell 101 of the outer casing 10 can only maintain a certain size due to the size limitation of the motor, in order to make the handle part 100 smaller and easier for the operator to hold and operate, the rear cover 102 adopts a half-and-half structure when HALF. This structure optimizes the overall size of the machine. Specifically, the handle part 100 of this power tool is narrow on both sides and wide at the top and bottom. Compared with the traditional barrel shape, the size of the handle part 100 is reduced, conforms to ergonomics, reduces the difficulty for the operator to use the power tool, and thus increases the convenience for the operator to use the power tool. To achieve the above handle structure, the two carbon brushes of this power tool are arranged vertically. The carbon brush isolation part 1021 of the rear cover 102 of the handle part 100 adopts a design with a groove in the middle. Specifically, the two sides 10212 of the carbon brush isolation part 1021 protrude towards the carbon brush relative to the middle part 10211, so that the two sides 10212 of the carbon brush isolation part 1021 and the corresponding rear... The inner bottom surface of the part containing the trigger 502 inside the cover 102 together constitutes the expanded space for the trigger 502. This expanded space for the trigger 502 is larger than the previous space, allowing the trigger 502 to open or close the switch 501 within this expanded space. If the carbon brush isolation part 1021 of the rear cover 102 of the handle part 100 does not adopt a design with a groove in the middle, but adopts a traditional flat design, the trigger 502 part can only expand outward, resulting in a significant increase in the size of the handle part, which is not conducive to actual operation. At the same time, the relatively flat inner surface of the rear cover 102 near the carbon brush will accumulate carbon powder after long-term use, which will create a risk of carbon powder overflow.

[0047] The foregoing is merely intended to illustrate the principles of this utility model. Furthermore, since many modifications and variations will readily occur to those skilled in the art, it is not intended to limit this utility model to the exact structures and operations shown and described. Although preferred embodiments have been described, details may be changed without departing from the essential concept of this utility model. Therefore, the technical solutions involved in this utility model include not only the technical solutions disclosed above, but also technical solutions composed of equivalent substitutions of technical features in the technical solutions involved in this utility model. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A handle portion, characterized in that, The handle portion has an ergonomic structure that is wide vertically and narrow laterally. The handle portion is suitable for power tools, which include a trigger and two carbon brushes arranged vertically. The handle portion includes: A rear cover providing internal space for the two carbon brushes includes a carbon brush isolation section with a groove in the middle. The carbon brush isolation section is used to separate the two carbon brushes from the trigger portion inside the rear cover. The carbon brush isolation section includes a middle portion, side portions located on both sides of the middle portion, and a connecting portion connecting the two side portions to the middle portion. The groove of the carbon brush isolation section faces the space where the carbon brushes are located. The two side portions of the carbon brush isolation section are located outside the groove of the groove. Since the two side portions of the carbon brush isolation section protrude towards the carbon brushes relative to the middle portion, the two side portions of the carbon brush isolation section and the inner bottom surface of the corresponding trigger portion inside the rear cover together constitute the expanded space for the movement of the trigger.

2. The handle portion according to claim 1, characterized in that, The carbon brush isolation section is located below the two carbon brushes, and the two sides of the carbon brush isolation section extend to connect with the lower inner wall of the rear cover.

3. A power tool, characterized in that, include: The housing for defining the internal space of a power tool includes the handle portion as described in claim 1 or 2; The power source is located inside the housing; A power transmission mechanism is disposed inside the housing and connected to the power source unit; A tool mounting section for installing tools, at least a portion of which is disposed within the housing and connected to the power transmission mechanism; An actuation assembly, including a trigger, a portion of which is disposed within the housing; as well as A controller is disposed within the housing. The controller is connected to the starting component and the power source unit. The controller recognizes the operating signal of the starting component and sends control commands to the power source unit to start or stop the power source unit.

4. The power tool according to claim 3, characterized in that, The rear edge region of the housing has a first space and a power line routing channel. A portion of the wall of the first space is used to assemble the controller and a portion of the power line connected to the controller. Other portions of the power line extend along the channel path of the power line routing channel. The housing has a second space for assembling a capacitor, wherein a capacitor wire is connected to the capacitor. The second space is located below the first space, wherein the power line and the capacitor wire are connected in parallel.

5. The power tool according to claim 3, characterized in that, The controller has a positioning part, and the housing has a positioning mating part. The positioning part and the positioning mating part cooperate and connect with each other to form the position stabilization structure of the controller.

6. The power tool according to claim 4, characterized in that, The outer casing also includes a dust-proof part, which together with the first space and the second space constitutes a sealed structure.

7. The power tool according to claim 6, characterized in that: The inner bottom of the housing has an inverted insert groove on the left side and a limiting groove on the right side. The left end of the trigger has an elastic inverted buckle. The left end of the trigger is inserted into the insert groove of the housing. There is a gap between the elastic inverted buckle and the insert groove for the trigger to rotate. The right end of the trigger is locked in the limiting groove of the housing.

8. The power tool according to claim 3, characterized in that: The starting assembly further includes a switch and a lever assembly rotatably mounted on the trigger, wherein the state of the switch controls the operation of the power source, the lever assembly includes a lever and a reset mechanism for the lever to reset after rotation, and a limiting part is provided inside the housing near the lever assembly; When the power tool is not in operation, the lever presses against the limiting part to restrict the inward movement of the trigger, thereby preventing the trigger from turning inward to trigger the switch, and the power source is in the off state; When the power tool is in operation, the lever no longer presses against the limiting part, causing the trigger to rotate inward and trigger the switch, and the power source is in the start state.

9. The power tool according to claim 3, characterized in that: A reinforcing member is embedded inside the trigger.

10. The power tool according to claim 9, characterized in that: The carbon brush isolation section has an insulating layer on the face near the trigger, and the reinforcement is covered with an outer plastic layer.

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