Electric grinder

Abstract

The utility model provides an electric grinder which comprises a shell, a speed regulation knob and a circuit board, a receding opening is formed in the middle of the upper side of the shell in the width direction, or a receding opening is formed in the middle of the shell in the thickness direction on one side of the shell in the width direction; the speed regulation knob is installed in the shell and comprises a knob part and a protruding part, and part of the knob part extends out of the shell from the receding opening; the knob part is provided with a first end and a second end in the first axial direction, the first end is provided with a receding groove, the protruding part is arranged on the end face of the second end of the knob part, the protruding part is provided with a containing cavity, and the containing cavity is communicated with the receding groove; the circuit board is installed in the shell, a speed adjusting device is arranged on the circuit board, the speed adjusting device stretches into the receding groove and the containing cavity, and the speed adjusting device can be controlled by rotating the rotary knob part. The rotating speed of the electric grinder head of the electric grinder can be adjusted according to the requirement of a user, and the position of the adjusting knob of the electric grinder conforms to the operation habit of the user.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electric tools, and in particular to an electric grinder. Background Art

[0002] Electric grinder is an indispensable power tool in the mold industry, furniture industry, mechanical processing industry, etc. Electric grinder has good grinding effect and high precision, and is loved by the majority of users.

[0003] The electric grinder generally includes a housing, a circuit board disposed in the housing, and a control switch disposed on the housing, etc. The control switch is connected to the circuit board, and the control switch controls the opening and closing of the electric grinder. However, the control switch disposed in the electric grinder in the related art generally controls the opening or closing of the electric grinder, but cannot control the rotation speed of the electric grinding head of the electric grinder, and is not flexible enough in application. Utility Model Content

[0004] An embodiment of the present application provides an electric grinder to solve the technical problem that the control switch of the electric grinder in the related art usually controls the electric grinder to be turned on or off, but cannot control the rotation speed of the electric grinding head of the electric grinder, and the application is not flexible enough.

[0005] The embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0006] The present application provides an electric grinder, comprising:

[0007] A shell, wherein a clearance opening is provided on the upper side of the shell and in the middle of the width direction, or a clearance opening is provided on one side of the shell in the width direction and in the middle of the thickness direction;

[0008] A speed knob, the speed knob is installed in the housing, the speed knob comprises a knob portion and a protruding portion, a portion of the knob portion extends out of the housing from the clearance opening; the knob portion has a first end and a second end in a first axial direction, the first end is provided with a clearance groove, the protruding portion is provided on the end surface of the second end of the knob portion, the protruding portion has a containing cavity, the containing cavity is connected with the clearance groove, and the first axial direction is the width direction of the housing;

[0009] A circuit board is installed in the shell, and a speed regulating device is arranged on the circuit board, and the speed regulating device is configured to control the rotation speed of the electric grinding head of the electric grinder; the speed regulating device extends into the give way groove and the accommodating cavity, and the speed regulating device can be controlled by rotating the knob part.

[0010] Beneficial effects of the embodiments of the present application: The electric grinder provided in the embodiments of the present application is provided with a speed regulating button, which can control the rotation speed of the electric grinding head of the electric grinder by controlling the speed regulating device, so that the rotation speed of the electric grinding head can be adjusted according to the needs of the user. In addition, the adjustment knob of the electric grinder provided in the embodiments of the present application is adjusted to the middle of the shell in the width direction or in the middle of the thickness direction by setting the raised portion, so that the setting of the adjustment knob conforms to the user's operating habits and the human-machine operating habits.

[0011] In a possible implementation manner, a side wall of the accommodating cavity on a side away from the clearance groove is provided with a special-shaped installation groove;

[0012] The speed regulating device has a rotating terminal, which is a special-shaped structure. The structure of the rotating terminal is the same as that of the special-shaped mounting groove. The rotating terminal is installed in the special-shaped mounting groove, and rotating the knob part can drive the rotating terminal to rotate.

[0013] In a possible implementation manner, a protruding block is provided on a side wall of the accommodating cavity on a side away from the making way groove, and the special-shaped installation groove is provided on the protruding block.

[0014] In a possible implementation manner, a through hole is provided on a bottom wall of the special-shaped installation groove facing away from the clearance groove, and a connecting member passes through the through hole, and the connecting member connects the protruding portion and the rotating terminal.

[0015] In a possible implementation manner, an annular protrusion is provided on a side of the protrusion facing away from the knob portion and surrounding the through hole;

[0016] The connecting piece is a screw, and the head of the screw is sunk into the interior of the annular protrusion.

[0017] In a possible implementation manner, a U-shaped notch is provided at the rear end of the upper side of the shell, and both sides of the U-shaped notch in the width direction of the shell are open;

[0018] The easing opening is arranged at the bottom of the U-shaped notch.

[0019] In a possible implementation manner, a height of the knob portion extending out of the shell in a thickness direction of the shell is not greater than a depth of the U-shaped notch.

[0020] In a possible implementation manner, the rear end of the shell is bent downward, and the angle between the bending direction of the rear end of the shell and the length direction of the front end of the shell is 5°-15°;

[0021] The length direction of the front end of the shell refers to the front end of the shell, from the electric grinding head end of the electric grinder to the starting bending zone, and the bending direction of the rear end of the shell refers to the rear end of the shell, from the starting bending zone to the end of the electric grinder away from the electric grinding head. The starting bending zone is located in the shell, which is the area where the shell starts to bend.

[0022] In a possible implementation manner, the knob portion is provided with anti-slip grooves on a circumferential side surface surrounding the first axial direction.

[0023] In a possible implementation manner, the anti-slip pattern is a plurality of strip grooves, each of the strip grooves extends in the first axial direction, and the plurality of strip grooves are spaced apart in a direction surrounding the first axial direction.

[0024] In addition to the technical problems solved by the present application, the technical features that constitute the technical scheme, and the beneficial effects brought about by the technical features of the technical scheme described above, other technical problems that can be solved by the electric grinder provided by the present application, other technical features included in the technical scheme, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 A schematic diagram of an electric grinder according to an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the coordination between the speed control knob and the circuit board in an embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of a speed control knob according to an embodiment of the present application;

[0029] Figure 4 A schematic diagram of a partial cross-section of an electric grinder according to an embodiment of the present application;

[0030] Description of reference numerals:

[0031] 100. Shell;

[0032] 110, yield opening; 120, U-shaped notch;

[0033] 200, speed knob;

[0034] 210, knob portion; 220, raised portion;

[0035] 211, first end; 212, second end; 213, clearance groove; 214, strip groove;

[0036] 221, accommodating cavity; 222, protruding block; 223, special-shaped mounting groove; 224, through hole; 225, annular protrusion;

[0037] 300, circuit board;

[0038] 310. Speed ​​regulating device;

[0039] 311, rotating terminal;

[0040] 400, electric grinding head;

[0041] L1, first axial direction.

[0042] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the embodiment provides a housing 100, a speed knob 200 and a circuit board 300, the upper side of the housing 100 and in the width direction (such as Figure 1 A clearance opening is provided in the middle of the housing 100 in the Y direction, or one side of the housing 100 in the width direction, and in the thickness direction (such as Figure 1 A clearance opening is provided in the middle part (in the Z direction).

[0045] Please continue reading Figure 1 , Figure 2 , Figure 3 and Figure 4The speed knob 200 is installed in the housing 100. The speed knob 200 includes a knob portion 210 and a protrusion 220. Part of the knob portion 210 extends out of the housing 100 from the clearance port, and the knob portion 210 extending out of the housing 100 is provided for the user to rotate and operate. The knob portion 210 has a first end 211 and a second end 212 in the first axial direction L1. The first end 211 is provided with a clearance groove 213. The protrusion 220 is provided on the end surface of the second end 212 of the knob portion 210. The protrusion 220 has a receiving cavity 221. The receiving cavity 221 and the clearance groove 213 are connected. That is to say, when viewed from the first end 211 of the knob portion 210, the speed control knob 200 has a stepped structure, and the middle portion of the end surface of the first end 211 of the knob portion 210 protrudes in a direction away from the second end 212 of the knob portion 210. When viewed from the second end 212 of the knob portion 210, the speed control knob 200 has a stepped groove.

[0046] like Figure 2 and Figure 4 As shown, the circuit board 300 is installed in the housing 100, and a speed regulating device 310 is provided on the circuit board 300. The speed regulating device 310 is configured to control the rotation speed of the electric grinding head 400 of the electric grinder. Exemplarily, the speed regulating device 310 is connected to the motor, and the motor is connected to the electric grinding head 400. The speed regulating device 310 controls the rotation speed of the electric grinding head 400 by controlling the rotation speed of the motor. The speed regulating device 310 extends into the clearance groove 213 and the accommodating cavity 221, and the speed regulating device 310 can be controlled by rotating the knob portion 210. In other words, the user can control the speed regulating device 310 by rotating the knob portion 210, thereby controlling the rotation speed of the electric grinding head 400.

[0047] The electric grinder provided in the embodiment of the present application is provided with a speed regulating button, which can control the rotation speed of the electric grinder head 400 of the electric grinder by controlling the speed regulating device 310, so that the rotation speed of the electric grinder head 400 can be adjusted according to the needs of the user. In addition, the adjustment knob of the electric grinder provided in the embodiment of the present application is adjusted to the middle of the housing 100 in the width direction or in the middle of the thickness direction through the setting of the protrusion 220, so that the setting of the adjustment knob meets the user's operating habits and meets the human-machine operation habits.

[0048] In some embodiments of the present application, Figure 3 As shown, a side wall of the accommodating cavity 221 away from the clearance groove 213 is provided with a special-shaped installation groove 223. Figure 4As shown, the speed regulating device 310 has a rotating terminal 311, which is a special-shaped structure. The structure of the rotating terminal 311 is the same as that of the special-shaped mounting groove 223. The rotating terminal 311 is installed in the special-shaped mounting groove 223, and the rotating knob part 210 can drive the rotating terminal 311 to rotate. The rotating terminal 311 with a special-shaped structure cooperates with the special-shaped mounting groove 223 matched therewith, so that the rotating knob part 210 can drive the rotating terminal 311 to rotate.

[0049] It should be noted that the irregular structure refers to a non-circular structure, for example, a triangular structure, a quadrilateral structure, a hexagonal structure, or an oblong (rectangular in the middle and semicircular at both ends of the rectangle in the length direction) structure.

[0050] For example, Figure 3 As shown, a protruding block 222 is provided on the side wall of the accommodating cavity 221 away from the clearance groove 213, and a special-shaped mounting groove 223 is provided on the protruding block 222. This arrangement can reduce the wall thickness of the protruding portion 220 and save the use of materials.

[0051] Please continue reading Figure 3 In this embodiment, the bottom wall of the special-shaped installation groove 223 away from the clearance groove 213 is provided with a through hole 224, through which a connecting piece passes, and the connecting piece connects the protrusion 220 and the rotating terminal 311. In other words, the speed knob 200 and the speed regulating device 310 are connected by the connecting piece, which facilitates the assembly of the electric grinder and can fix the position of the adjusting knob to prevent it from being separated from the speed regulating device 310 and affecting the use of the electric grinder.

[0052] Exemplarily, an annular protrusion 225 is arranged on the side of the protrusion 220 facing away from the knob portion 210 and around the through hole 224, and the connecting member is a screw, and the head of the screw is sunk into the inside of the annular protrusion 225. In other words, the annular protrusion 225 is arranged around the through hole 224, and there is a certain distance between the annular protrusion 225 and the circumferential edge of the through hole 224, and when the screw connects the speed knob 200 and the speed regulating device 310, the head of the screw is sunk into the inside of the annular protrusion 225.

[0053] like Figure 1As shown, a U-shaped notch 120 is provided at the rear end of the upper side of the housing 100, and two opposite side walls of the U-shaped notch 120 are opposite in the length direction of the housing 100. In other words, the two sides of the U-shaped notch 120 in the width direction of the housing 100 are open. The clearance opening is set at the bottom of the groove of the U-shaped notch 120. In other words, the knob part 210 extending out of the housing 100 is located in the U-shaped notch 120. This setting can increase the aesthetics of the electric grinder, and the knob part 210 is located in the U-shaped notch 120, which can reduce the height of the knob part 210 protruding from the housing (the upper open end of the U-shaped notch 120), making the human-machine operation more comfortable. In addition, the knob portion is arranged in the middle of the bottom of the U-shaped slot 120 (in the width direction of the shell 100). This arrangement allows the user to rub the knob portion with the thumb rubbing the knob portion located inside the U-shaped slot 120 and will not touch the two side edges of the bottom of the U-shaped slot 120 in the width direction of the shell, making the user's operation more comfortable. This arrangement also makes the electric grinder more beautiful.

[0054] Exemplarily, the height of the knob portion 210 extending out of the housing 100 in the thickness direction of the housing 100 is not greater than the depth of the U-shaped groove. In other words, the knob portion 210 extending out of the housing is completely sunk into the U-shaped groove 120, which can increase the comfort of the user when using the electric grinder.

[0055] In some embodiments of the present application, in order to make the user hold the electric grinder more comfortable, the rear end of the housing 100 is bent downward, and the angle between the bending direction of the rear end of the housing 100 and the length direction of the front end of the housing 100 is 5°-15°. The length direction of the front end of the housing 100 refers to the front end of the housing 100, from the electric grinder head 400 end of the electric grinder to the starting bending area, and the bending direction of the rear end of the housing 100 refers to the rear end of the housing 100, from the starting bending area to the end of the electric grinder away from the electric grinder head 400. The starting bending area is located in the housing 100 and is the area where the housing 100 starts to bend.

[0056] In some embodiments of the present application, the knob portion 210 is provided with anti-slip grooves on the circumferential side surfaces surrounding the first axial direction L1 , and the provision of the anti-slip grooves can reduce slipping when the user turns the knob portion 210 .

[0057] For example, Figure 2 and Figure 3 As shown, the anti-slip pattern is a plurality of strip grooves 214 , each strip groove 214 extends in the first axial direction L1 , and the plurality of strip grooves 214 are arranged at intervals in a direction surrounding the first axial direction L1 .

[0058] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0059] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An electric grinder, characterized in that: include: A shell, wherein a clearance opening is provided on the upper side of the shell and in the middle of the width direction, or a clearance opening is provided on one side of the shell in the width direction and in the middle of the thickness direction; A speed knob, the speed knob is installed in the housing, the speed knob comprises a knob portion and a protruding portion, a portion of the knob portion extends out of the housing from the clearance opening; the knob portion has a first end and a second end in a first axial direction, the first end is provided with a clearance groove, the protruding portion is provided on the end surface of the second end of the knob portion, the protruding portion has a receiving cavity, the receiving cavity is connected with the clearance groove, and the first axial direction is the width direction of the housing; A circuit board is installed in the shell, and a speed regulating device is arranged on the circuit board, and the speed regulating device is configured to control the rotation speed of the electric grinding head of the electric grinder; the speed regulating device extends into the give way groove and the accommodating cavity, and the speed regulating device can be controlled by rotating the knob part.

2. The electric grinder according to claim 1, characterized in that: A special-shaped installation groove is provided on the side wall of the accommodating cavity away from the clearance groove; The speed regulating device has a rotating terminal, which is a special-shaped structure. The structure of the rotating terminal is the same as that of the special-shaped mounting groove. The rotating terminal is installed in the special-shaped mounting groove, and rotating the knob part can drive the rotating terminal to rotate.

3. The electric grinder according to claim 2, characterized in that: A protruding block is arranged on the side wall of the accommodating cavity which is away from the making way groove, and the special-shaped installation groove is arranged on the protruding block.

4. The electric grinder according to claim 2, characterized in that: A through hole is provided on the bottom wall of the special-shaped installation groove away from the clearance groove, and a connecting member passes through the through hole, and the connecting member connects the protruding portion and the rotating terminal.

5. The electric grinder according to claim 4, characterized in that: An annular protrusion is arranged on a side of the protrusion facing away from the knob portion and surrounding the through hole; The connecting piece is a screw, and the head of the screw is sunk into the interior of the annular protrusion.

6. The electric grinder according to claim 1, characterized in that: A U-shaped notch is provided at the rear end of the upper side of the shell, and the two sides of the U-shaped notch in the width direction of the shell are open; The easing opening is arranged at the bottom of the U-shaped notch.

7. The electric grinder according to claim 6, characterized in that: The height of the knob portion extending out of the housing in the thickness direction of the housing is not greater than the depth of the U-shaped notch.

8. The electric grinder according to any one of claims 1 to 7, characterized in that: The rear end of the shell is bent downward, and the angle between the bending direction of the rear end of the shell and the length direction of the front end of the shell is 5°-15°; The length direction of the front end of the shell refers to the front end of the shell, from the electric grinding head end of the electric grinder to the starting bending zone, and the bending direction of the rear end of the shell refers to the rear end of the shell, from the starting bending zone to the end of the electric grinder away from the electric grinding head. The starting bending zone is located in the shell, which is the area where the shell starts to bend.

9. The electric grinder according to any one of claims 1 to 7, characterized in that: The knob portion is provided with anti-slip grooves on a circumferential side surface surrounding the first axial direction.

10. The electric grinder according to claim 9, characterized in that: The anti-slip pattern is a plurality of strip grooves, each of the strip grooves extends in the first axial direction, and the plurality of strip grooves are spaced apart in a direction surrounding the first axial direction.

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