CN111890193A

CN111890193A - Hand-held electric tool

Info

Publication number: CN111890193A
Application number: CN202010573677.XA
Authority: CN
Inventors: 林躜
Original assignee: Suzhou Anzipu Intelligent Technology Co ltd
Current assignee: Suzhou Anzipu Intelligent Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-11-06

Abstract

The present disclosure relates to a hand-held power tool including a tool body, the tool body including: a first housing portion provided with one or more switch portions; a second housing portion provided at a first end portion of the tool main body; a third housing portion provided at a second end portion of the tool body opposite to the first end portion; wherein the first housing portion is disposed between the second housing portion and the third housing portion. The handheld electric tool disclosed by the invention is beneficial to the operator to check the state of the switch part, and the switch part is also prevented from being influenced by dust or impurities, so that the use safety of the handheld electric tool is improved.

Description

Hand-held electric tool

Technical Field

The present disclosure relates to the field of power tools, and more particularly, to a hand held power tool.

Background

A hand-held power tool is a commonly used power tool in manufacturing activities, typically for cutting and grinding of glass reinforced plastics, such as angle or straight grinders. Generally, the gear shifting switch part of the hand-held electric tool is arranged at the tail part or the head part of the hand-held electric tool, so that an operator cannot conveniently view and operate the switch. When an operator operates the gear shifting switch in the using process, the operator needs to stop working firstly and then complete the operation under the coordination of two hands. Such methods delay time; if the hand-held electric tool moves under the condition of keeping the motion state, certain potential safety hazards exist.

Generally, a hand-held power tool is provided with only one holding position near the handpiece. In actual use, however, part of users tend to hold the angle grinder at a position far away from the machine head, for example, when the angle grinder is used together with an auxiliary handle, the angle grinder switch is generally arranged on the front side or the rear side end face. When the switch is operated, the hand which is required to be held needs to move on the machine body, or the hand on the auxiliary handle is required to be separated from the auxiliary handle, and then the main switch is pushed.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a hand-held power tool that facilitates one-handed operation of a switch.

According to a first aspect of embodiments of the present disclosure, there is provided a hand-held power tool including a tool body including: a first housing portion provided with one or more switch portions; a second housing portion provided at a first end portion of the tool main body; a third housing portion provided at a second end portion of the tool body opposite to the first end portion; wherein the first housing portion is disposed between the second housing portion and the third housing portion.

In an embodiment, the switch portion is closer to the third housing portion on the first housing portion than the second housing portion.

In one embodiment, a surface of the first housing portion is provided with a recess, and the switch portion is disposed within the recess.

In one embodiment, an outer surface of the switch portion is not higher than an outer surface of the first housing portion.

In one embodiment, the hand-held power tool is provided with a switch portion, and the switch portion is a shift switch.

In one embodiment, the hand-held power tool is provided with a switch portion, and the switch portion is a power switch.

In one embodiment, the hand-held power tool is provided with two switch sections, one of which is a shift switch and the other of which is a power switch.

In one embodiment, the third housing portion is provided with a boss; the protruding part is matched with the switch part so as to operate the switch part; the protruding portion protrudes from the first housing portion.

In an embodiment, the raised portion is provided as a partial protrusion.

In an embodiment, in a direction perpendicular to the extending direction of the tool main body, the switch portion includes a switch body and a switch button, which are sequentially arranged from inside to outside.

In one embodiment, the tool further includes a circuit board disposed inside the switch body in a direction perpendicular to an extending direction of the tool main body, and the switch body is connected to the circuit board.

In an embodiment, the switch portion further includes a switch cover, and the switch cover is transparent.

In one embodiment, two ends of the switch cover body are vertically provided with columnar protrusions; the operating part is provided with a groove at the inner side of the switch part, and the groove is used for fixing the columnar protrusion.

In one embodiment, the columnar protrusion is fixed in the groove by potting.

In one embodiment, a screw hole is provided in the columnar protrusion, and the columnar protrusion is fixed to the operation portion by a screw that is fitted to the screw hole.

In one embodiment, the screw hole is a blind hole, and one end close to the outer side of the first shell part is closed; the screw is arranged inside the columnar protrusion.

In one embodiment, the switch portion is spaced from the interior space of the tool body by the recess and the circuit board.

In one embodiment, the circuit board is further connected with an indicator light.

In one embodiment, the indicator light is provided in plurality.

In one embodiment, the switch portion is provided at an upper portion of the inner space of the tool main body; in a cross section passing through a first center point of an outer surface of the switch key and perpendicular to an extending direction of the tool body, an angle between a line connecting the first center point and a second center point of the cross section of the tool body and a vertical line passing through the second center point is set to-75 ° to 75 °.

In one embodiment, the hand-held power tool is an angle grinder.

In one embodiment, the angle grinder is a brushless angle grinder.

In one embodiment, the hand-held power tool is a straight grinder.

In one embodiment, the direct grinding machine is a brushless direct grinding machine.

In one embodiment, the hand-held power tool further comprises an auxiliary handle disposed at the first end of the tool body and disposed at an angle to the tool body.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the utility model discloses a handheld electric tool's operating portion is provided with second casing portion and third casing portion, sets out two operating position on the operating portion, is convenient for carry out bimanualness to set up the switch on being located the first casing portion between second casing portion and the third casing portion, switch portion is close to third casing portion, makes the operator utilize the one hand of gripping the third casing portion to operate switch portion in the use, has realized the one-hand operation to handheld electric tool. Moreover, the switch part is arranged on the first shell part, so that the state of the switch part can be checked by an operator, and the switch part is prevented from being influenced by dust or impurities, and the use safety of the handheld electric tool is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural view illustrating a hand-held power tool according to an exemplary embodiment of the present disclosure.

Fig. 2 is a sectional view illustrating a third housing portion of a hand-held power tool according to an exemplary embodiment of the present disclosure.

Fig. 3 is a cross-sectional view illustrating a switch portion of a hand-held power tool according to an exemplary embodiment of the present disclosure.

Fig. 4 is a cross-sectional view illustrating a switch portion and a third housing of a hand-held power tool according to an exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In some techniques, a first holding position and a second holding position are provided on a body of a hand-held power tool, such as an angle grinder or a straight grinder, for controlling the hand-held power tool with two hands. Typically, the first holding position is a light-load holding position near the tool mounting portion of the hand-held power tool, i.e., near the head portion of the hand-held power tool during operation. The second holding position is close to the tail part of the hand-held electric tool and is a heavy-load holding position in the operation process or a holding position for matching with the auxiliary handle for working. When the switch part is arranged at the tail part of the hand-held electric tool or close to one side of the head part, in order to control the switch, the operation can only be suspended firstly, and the two hands are matched with the control switch. Therefore, time is delayed, and certain potential safety hazards exist in the process of keeping the handheld electric tool in a motion state.

Meanwhile, the tail of the handheld electric tool is usually provided with a vent, the switch is arranged at the tail of the handheld electric tool, dust or impurities can enter the tail of the handheld electric tool through the vent, the switch can be clamped by the dust or the impurities, and even great electrical potential safety hazards are brought.

Some hand-held electric tools set the switch on one side of the head of the hand-held electric tool, and this kind of structure still needs the cooperation of operator's both hands to operate, is not convenient for improve work efficiency.

The problems that exist are that: firstly, when the gear is shifted during the tool, the work must be stopped, and then the gear is shifted by the impeller. Grasping the machine with one hand; then the machine is moved to make eyes see the wave wheel, and then the other hand adjusts the wave wheel to change the gear of the machine. The operation of both hands is not only related to, delays time, if the machine keeps the motion state simultaneously, the mobile machine has the hidden danger of mechanical injury easily. Secondly, the impeller is easily stuck by dust, and even brings great potential safety hazards if the impeller is made of metal powder. Thirdly, when the machine contains full capacity electric quantity which is larger than the product of 220Vx50uF, the space at the rear side of the machine is occupied by the capacitor and the capacitor pressure relief space. The poking wheel cannot be placed at the rear side due to mechanical arrangement and electrical safety.

To the above-mentioned problem, this disclosure provides a handheld electric tool, the one-hand operation switch portion of not only being convenient for can also avoid certain potential safety hazard.

The hand-held power tool of the present disclosure may be any power tool that can be directly operated by hand, for example, may be an angle grinder or a straight grinder, for example, may be a brushless angle grinder or a brushless straight grinder.

Fig. 1 is a schematic view illustrating a structure of a hand-held power tool according to an exemplary embodiment of the present disclosure. As shown in fig. 1, the tool body includes a tool mounting portion 100, an operating portion 200, and a tail portion 300. In fig. 1, the hand-held power tool is illustrated by way of an angle grinder, which may be, for example, a brushless angle grinder.

The tool body includes a first housing portion 201, a second housing portion 202, and a third housing portion 203. The second housing portion 202 is disposed at a first end of the tool body, i.e., opposite the tool mounting portion 100, and the third housing portion 203 is disposed at a second end of the tool body, i.e., opposite the tail portion 300. The first housing part 201 is arranged between the second housing part 202 and the third housing part 203. The first housing 201 is provided with a switch portion 400, and the switch portion 400 is provided closer to the third housing 203 than the second housing 202 on the first housing 201.

In the present disclosure, the first housing part 201 may be provided with a recess 210 thereon, and the switch part 400 is disposed in the recess 210. The outer surface of the switch portion 400 may be disposed not higher than the outer surface of the first housing portion 201. Due to the arrangement, the switch part 400 cannot be easily touched by an operator or other objects arranged near the tool to cause misoperation, and certain potential safety hazards are avoided.

It should be noted that the switch portion 400 is disposed on the first housing portion 201 near the third housing portion 203 for facilitating the operation of the switch by one hand of the operator during the use process. In practical production, the specific position of the switch portion 400 on the first housing portion 201 may be determined according to the specific application range or usage mode of the handheld power tool, for example, the switch portion 400 may be disposed above or below the first housing portion 201 in the vertical direction of the handheld power tool. Alternatively, the switch unit 400 may be provided on the right or left side of the first housing 201 with the tool mounting unit 100 of the electric hand tool as the front and the rear. In the embodiment of the present disclosure, the switch portion 400 is disposed above the first housing portion 201 to the left, and the switch portion 400 is disposed closer to the third housing portion 203 than the second housing portion 202.

The operation part 200 of the hand-held electric tool is provided with a second shell part 202 close to the tool mounting part 100 and a third shell part 203 close to the tail part 300, two operation positions, namely the second shell part and the third shell part are arranged on the operation part 200, so that two-hand operation of an operator is facilitated, a switch part 400 is arranged on a first shell part 201 between the second shell part 202 and the third shell part 203 and is close to the third shell part 203, so that the operator can operate the switch part by using one hand holding the third shell part 203 in the using process, and the one-hand operation of the switch of the hand-held electric tool is realized. In addition, the switch unit 400 is disposed on the first housing portion 201, which is not only beneficial for the operator to check the state of the switch unit 400, but also prevents the switch unit 400 from being affected by dust or impurities, thereby improving the safety of the handheld electric tool.

Fig. 2 is a sectional view illustrating a third housing portion of a hand held power tool according to an exemplary embodiment of the present disclosure. As shown in fig. 1 and 2, in the present disclosure, a protruding portion 500 may be further provided on the third housing portion 203, and the protruding portion 500 protrudes from the third housing portion 203. The provision of the protruding portion 500 on the third housing portion 203 can help an operator to determine a holding position during use and guide the operator to grasp the position of the switch portion 400, facilitating the operation of the switch portion 400 during use. That is, the protrusion 500 is provided to be engaged with the switching part 400. Therefore, in the actual production process, the position, size and shape of the protrusion 500 can be specifically set according to the position of the switch part 400 and the corresponding holding requirement.

In the embodiment of the present disclosure, the protrusion portion 500 is provided as a partial protrusion, that is, a protrusion is provided only at a position where it is engaged with the switch portion 400, and may include, for example, a first protrusion portion 501 and a second protrusion portion 502. Specifically, the first boss portion 501 is located on the left side of the third housing portion 203, and the second boss portion 502 is located on the right side of the third housing portion 203. The first protruding portion 501 and the second protruding portion 502 are disposed opposite to each other on the third housing portion 203. The first protruding portion 501 and the second protruding portion 502 are both disposed to protrude from the first housing portion 201. The switch unit 400 is disposed above the first housing portion 201 to the left, and the switch unit 400 is disposed closer to the third housing portion 203 than the second housing portion 202, and the first and

second protrusions

501 and 502 are disposed at positions that guide an operator to quickly position the switch unit 400 and perform corresponding operations during high-speed operation of the hand-held power tool.

In the present disclosure, the lengths of the first protruding portion 501 and the second protruding portion 502 are the same as that of the third housing portion 203, that is, the first protruding portion 501 and the second protruding portion 502 are both connected to the first housing portion 201, such an arrangement not only combines the ergonomic features and facilitates the holding of the operator, but also facilitates the operator to determine the position of the switch portion 400.

On the basis of the above technical features, the connection portions of the first protruding portion 501 and the second protruding portion 502 with the first housing portion 201 may be set as inclined surfaces, that is, a certain slope is formed between the first protruding portion 501 and the second protruding portion 502 protruding from the first housing portion 201 and the first housing portion 201, so that an operator feels more comfortable during use, and a corresponding operating finger, such as a thumb, is more combined to achieve a holding posture when the switch portion 400 is not required to be operated.

In some possible embodiments, the protrusion may be provided on the entire circumference of the outside of the third housing part 203, and the protrusion may be provided higher at the position where the switch part 400 is engaged.

Fig. 3 is a cross-sectional view illustrating a switch portion of a hand-held power tool according to an exemplary embodiment of the present disclosure. Fig. 4 is a cross-sectional view illustrating a switch portion and a third housing of a hand-held power tool according to an exemplary embodiment of the present disclosure. As shown in fig. 2, 3, and 4, the switch unit 400 includes a switch body 401, an elastic member 402, and a switch button 403, which are provided in this order from the inside of the electric hand tool to the outside of the electric hand tool in a direction perpendicular to the extending direction of the tool main body. The elastic member 402 may be any elastic member, and the elastic member 402 of the present disclosure is a spring. The elastic member 402 is provided to allow the switch key 403 to be bounced after being pressed. In the present disclosure, a key cap 404 may be further disposed outside the switch key 403 to facilitate the key pressing.

With continued reference to fig. 3, a circuit board 600 is further provided inside the switch body 401, and the switch body 401 is connected to the circuit board 600. It should be noted that, in some possible solutions, the circuit board 600 may also be disposed at other positions according to actual production requirements, for example, the tail 300 of the hand-held power tool, so as to achieve the purpose of controlling the switch.

In the present disclosure, the switch portion 400 may be provided singly or in plurality, that is, one switch portion 400 may be provided, or a plurality of switch portions 400 may be provided, for example, two switch portions 400 may be provided. The plurality of switch portions 400 may be disposed at different positions according to specific functional requirements. When only one switch portion 400 is disposed ON the first housing portion 201, the switch body 401 may be a power switch, i.e., an ON/OFF switch, for controlling the main power of the handheld electric tool, or may be a gear shift switch, e.g., a pulsator switch. In some possible embodiments, when only one switch portion 400 is provided on the first housing portion 201, the switch portion 400 may be provided to function as both a power switch and a shift switch. When the first housing 201 is provided with two switch portions 400, one of them may be a shift switch and the other may be a power switch.

When the switch body 401 is provided as a shift switch, the speed change of the machine operation may be set to be gradually changed when the shift switch is operated, that is, when the gear is shifted, so that the one-handed operation can be applied, and the stability and safety of the machine operation can be maintained. The gear shifting switch can be provided with pole speed regulation, namely when the speed regulation, the gear shifting position can be regulated to a low position from the highest position, and after the speed regulation is finished, the gear shifting position is regulated to a high position, and the change of the gear can be set to be at a constant speed. For example, the gear switch may be provided with a fifth gear, when speed is adjusted, the gears may be sequentially lowered from the fifth gear to a fourth gear, a third gear, a second gear to the first gear, and after the speed is adjusted, the gears may be sequentially raised from the first gear to the second gear, the third gear, the fourth gear to the fifth gear.

On the basis of the technology, the switch can be set to be a long-press switch, and the speed of the handheld electric tool can gradually return to the highest speed. In the present disclosure, an indicator lamp 601 may be further disposed on the circuit board 600 for indicating an operation state of the hand-held power tool. The indicator lamp 601 may be provided singly or in plurality, for example, two. The indicator lamp 601 may be an LED lamp. Different colors can be set for different LED lamps, for example, the colors can be respectively set to green or red, and the colors can be set in combination according to different requirements. The indicator lamp 601 not only helps to indicate different operating states of the hand-held power tool, such as different operating gears, or normal operation, or failure, etc., but also can illuminate in a dark state.

On the basis of the technical characteristics, when the switch is provided with a gear shifting function, the LED lamp connected to the circuit board can be set to be in different states during gear shifting through a Pulse Width Modulation (PWM) technology, for example, the brightness of the LED lamp can be set to be different in different gears.

On the basis of the above technical features, the switch cover 405 may be further disposed on the outer side of the switch portion 400, and the switch cover 405 may be a transparent shell, for example, an acrylic shell. The switch cover 405 is provided as a transparent case to help the indicator lamp 601 function. In some possible embodiments, the first housing 201 may be a transparent housing, which can further increase the indication function of the indicator lamp 601.

In addition to the above technical features, the switch cover 405 may further have cylindrical protrusions, such as a first cylindrical protrusion 411 and a second cylindrical protrusion 412, at two ends thereof. A first groove 413 and a second groove 414 are provided on the inner side of the operating part 200 at the position of the switching part 400, the first groove 413 is used for fixing the first columnar protrusion 411, the second groove 414 is used for fixing the second columnar protrusion 412, namely, the diameter of the first groove 413 is set to just accommodate the first columnar protrusion 411, and the diameter of the second groove 414 is set to just accommodate the second columnar protrusion 412. The switch cover 405 is fixed to the operating unit 200, and the switch unit 400 is a closed space to prevent dust or foreign substances from affecting or damaging the switch body 401. In particular, in the arrangement of the hand-held electric tool, components such as a motor and a brush are arranged in the third housing part 203, and a large amount of dust is generated during the operation of the relevant components.

In the present disclosure, the first columnar protrusion 411 may also be fixed within the first recess 413 by potting. The second cylindrical protrusion 412 is fixed in the second recess 414 by potting. Such an arrangement can close the switch portion and contribute to the stability of the switch cover 405 provided on the operation portion 200.

On the basis of the above-mentioned technology, the first columnar protrusion 411 and the second columnar protrusion 412 may be further provided with a screw hole, and the first columnar protrusion 411 and the second columnar protrusion 412 are further fixed by a screw matched with the screw hole. This arrangement makes it possible to seal the switch section 400. The screw holes may be blind holes, i.e. the end close to the first housing part 201 is closed, and the matching screws extend into the screw holes through the inner side of the switch part 400 for fixing. Due to the arrangement, the switch part 400 is independently arranged on the inner side of the first housing part 201, is not communicated with the outer side of the first housing part 201, and is not the same as the inner side of the first housing part 201, so that the influence of impurities on the outer side of the hand-held electric tool on the use of the switch part 400 can be avoided, and the interference of devices inside the tool body on the switch part 400 in the use process can be avoided. The working safety stability and the service life of the hand-held electric tool are enhanced.

On the basis of the above technical features, the present disclosure may be further provided with an auxiliary handle (not shown), which may be provided at the first end portion of the tool body, and for example, at an angle such as a right angle with the first end portion of the tool body, so as to facilitate more convenient and stable work in some work situations.

Through the technical characteristics, the handheld electric tool disclosed by the disclosure is convenient for operating the switch by one hand, the convenience and the safety of the operation of the handheld electric tool are improved, the service life of the handheld electric tool is prolonged, and the competitiveness of a product is further improved.

In the use process of the hand-held electric tool, the tool mounting part 100 of the hand-held electric tool can also be provided with a grinding plate, and the grinding plate is usually arranged below the hand-held electric tool for operation in use, in the disclosure, the switch part 400 can be arranged on the opposite side of the grinding plate on the hand-held electric tool, namely above the hand-held electric tool, and meanwhile, the angle between the connecting line of the central point of the switch part 400 and the central point of the first housing part 201 and the central vertical line of the first housing part 201 is set to be-75 degrees to 75 degrees. In other words, the switch unit 400 is provided in the upper part of the internal space of the tool body; in a cross section passing through a first center point C of the outer surface of the switch key 403 and perpendicular to the extending direction of the tool body, an angle α between a line OC connecting the first center point C and a second center point O of the cross section of the tool body and a vertical line OV passing through the second center point O is set to-75 ° to 75 °, as shown in fig. 2. The arrangement is convenient for the display of the indicator lamp in the use process, namely when an operator presses the switch, the operation condition of the handheld electric tool can be judged through the indication of the indicator lamp, and certain help and warning effects are achieved.

The design of this disclosure may also place the second side switch or the shift switch of the machine in the middle portion of the tool body. Reasonably avoid the first holding position, namely the light-load holding position, and simultaneously avoid the second holding position, namely the heavy-load holding position. When the auxiliary handle is engaged with the first holding position, the switch portion is provided in the middle portion of the tool body, and the first holding position and the auxiliary handle can be avoided.

The design of the present disclosure is visually visible, presenting a partial protrusion of the second holding position, and leaving the switch portion to be placed on the left side of the hand held power tool. When the right-hand operator operates, the thumb corresponds to the switch position on the left side, and the switch part can be touched without adjusting the working posture, so that the operation is convenient. Accordingly, the switch section may be provided on the right side of the tool body to facilitate the operation by the left-handed operator.

The foregoing description of the implementations of the disclosure has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the disclosure. The embodiments were chosen and described in order to explain the principles of the disclosure and its practical application to enable one skilled in the art to utilize the disclosure in various embodiments and with various modifications as are suited to the particular use contemplated.

Claims

1. A hand-held power tool comprising a tool body, the tool body comprising:

a first housing portion provided with one or more switch portions;

a second housing portion provided at a first end portion of the tool main body;

a third housing portion provided at a second end portion of the tool body opposite to the first end portion;

wherein the first housing portion is disposed between the second housing portion and the third housing portion.

2. The hand-held power tool of claim 1,

the switch portion is closer to the third housing portion on the first housing portion than the second housing portion.

3. The hand-held power tool of claim 1,

the surface of the first housing portion is provided with a recessed portion, and the switch portion is disposed in the recessed portion.

4. The hand-held power tool of claim 1,

the outer surface of the switch portion is not higher than the outer surface of the first housing portion.

5. The hand-held power tool of claim 1,

the hand-held electric tool is provided with a switch part, and the switch part is a gear shifting switch.

6. The hand-held power tool of claim 1,

the hand-held electric tool is provided with a switch part, and the switch part is a power switch.

7. The hand-held power tool of claim 1,

the hand-held electric tool is provided with two switch parts, wherein one switch part is a gear shifting switch, and the other switch part is a power switch.

8. The hand-held power tool of claim 1,

the third shell part is provided with a bulge part;

the protruding part is matched with the switch part so as to operate the switch part;

the protruding portion protrudes from the first housing portion.

9. The hand-held power tool of claim 8,

the convex part is arranged to be locally convex.

10. The hand-held power tool of claim 1,

in the direction perpendicular to the extending direction of the tool main body, the switch portion comprises a switch body and a switch key which are sequentially arranged from inside to outside.

11. The hand-held power tool of claim 10,

the tool also comprises a circuit board which is arranged on the inner side of the switch body in the direction perpendicular to the extending direction of the tool main body, and the switch body is connected to the circuit board.

12. The hand-held power tool of claim 10,

the switch portion further comprises a switch cover body, and the switch cover body is transparent.

13. The hand-held power tool of claim 12,

columnar bulges are vertically arranged at two ends of the switch cover body; the operating part is provided with a groove at the inner side of the switch part, and the groove is used for fixing the columnar protrusion.

14. The hand-held power tool of claim 13,

the columnar protrusions are fixed in the grooves through glue filling.

15. The hand-held power tool of claim 13,

the columnar protrusion is internally provided with a screw hole and is fixed on the operation part through a screw matched with the screw hole.

16. The hand-held power tool of claim 15,

the screw hole is a blind hole, and one end of the screw hole close to the outer side of the first shell part is closed;

the screw is arranged inside the columnar protrusion.

17. The hand-held power tool of claim 16,

the switch portion is spaced apart from an inner space of the tool body by the recess portion and the circuit board.

18. The hand-held power tool of claim 11,

and the circuit board is also connected with an indicator light.

19. The hand-held power tool of claim 18,

the indicator light sets up to a plurality ofly.

20. The hand-held power tool of claim 10,

the switch part is arranged at the upper part of the inner space of the tool main body;

in a cross section passing through a first center point of an outer surface of the switch key and perpendicular to an extending direction of the tool body, an angle between a line connecting the first center point and a second center point of the cross section of the tool body and a vertical line passing through the second center point is set to-75 ° to 75 °.

21. The hand held power tool according to any one of claims 1-20,

the hand-held electric tool is an angle grinder.

22. The hand-held power tool of claim 21,

the angle grinder is a brushless angle grinder.

23. The hand held power tool according to any one of claims 1-20,

the handheld electric tool is a straight grinder.

24. The hand-held power tool of claim 23,

the direct grinding machine is a brushless direct grinding machine.

25. The hand held power tool according to any one of claims 1-20,

the hand-held power tool further includes an auxiliary handle disposed at the first end of the tool body and disposed at an angle to the tool body.