Angle grinder

Abstract

This invention provides an angle grinder, comprising: a housing; a motor supported by the housing; a switching assembly for controlling the motor's activation; and an operating assembly for triggering the switching assembly. The switching assembly includes: a contact, a diaphragm that can be pushed by the operating assembly to contact the contact, and an encapsulation, with the diaphragm and contact mounted on the encapsulation. The angle grinder's switching assembly proposed in this invention includes a diaphragm structure, resulting in a smaller overall size and improved safety compared to traditional angle grinder switching assemblies. This reduces the overall size of the angle grinder and lowers costs, while also providing a good user experience.

Description

Technical Field

[0001] This invention relates to a power tool, specifically to an angle grinder. Background Technology

[0002] Traditional angle grinders have large switch components and low safety, which increases the size of the angle grinder, makes it difficult to make the internal components compact, and increases the user's burden. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide an angle grinder that employs a touch switch, provides a good tactile feel, is safe and reliable, and has a reduced size.

[0004] To achieve the above-mentioned main objectives, the present invention provides an angle grinder, comprising: a housing; a motor supported by the housing; a switch assembly for controlling the motor to turn on; and an operating assembly for operating to trigger the switch assembly. The switch assembly includes: a contact; a diaphragm that can be pushed by the operating assembly to contact the contact; and an encapsulation, wherein the diaphragm and the contact are mounted on the encapsulation.

[0005] Optionally, the angle grinder may also include a circuit board, on which the switch assembly is mounted.

[0006] Optionally, the travel of the switch assembly is less than or equal to 1 mm and greater than or equal to 0.2 mm.

[0007] Optionally, the angle grinder may also include: a button that connects to or contacts a diaphragm; and an elastic element disposed between the button and the operating component.

[0008] Optionally, the motor can rotate about a first straight line, and the operating components include a push button and an extension rod. The push button can be pushed along a direction parallel to the first straight line, and the extension rod can contact an elastic element. The extension rod can move along the first straight line and at least partially overlap with the projection of the motor in the radial direction of the first straight line.

[0009] Optionally, the extension rod and the elastic element are integrally molded.

[0010] Optionally, the motor can rotate about a first straight line, and the operating components include a push button and an extension rod. The push button can be pushed along a direction parallel to the first straight line, and the extension rod is connected to the push button.

[0011] Optionally, the height of the switch assembly is less than or equal to 10 mm and greater than or equal to 3 mm.

[0012] To achieve the above-mentioned main objectives, the present invention provides an angle grinder, including a housing, a motor supported by the housing, a switch assembly for controlling the motor to turn on, an operating assembly for operating to trigger the switch assembly, and a circuit board on which a drive circuit is mounted; the switch assembly includes: a contact and a diaphragm that can be pushed by the operating assembly to contact the contact; the switch is mounted on the circuit board.

[0013] Optionally, the travel of the switch assembly is less than or equal to 1 mm and greater than or equal to 0.2 mm.

[0014] Optionally, the angle grinder may also include an elastic element disposed between the operating component and the switch component.

[0015] Optionally, the operating component can actuate two or more of the switch components at different movement positions.

[0016] Beneficial effects: The angle grinder switching component proposed in this invention includes a diaphragm structure, has a small overall size, and is safer than traditional angle grinder switching components, thereby reducing the overall size of the angle grinder and lowering costs. The angle grinder also has a good operating feel. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the angle grinder provided in the first embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the provided angle grinder's operating components when in the first position;

[0019] Figure 3 yes Figure 1 A schematic diagram of the internal structure of the provided angle grinder's operating components when in the second position;

[0020] Figure 4 yes Figure 1 A schematic diagram of the switch assembly for the provided angle grinder;

[0021] Figure 5 yes Figure 4 An exploded view of the switch assembly of the provided angle grinder;

[0022] Figure 6 yes Figure 4 A dimensional schematic diagram of the switch assembly for the provided angle grinder;

[0023] Figure 7 yes Figure 1 A plan view of the internal structure of the provided angle grinder;

[0024] Figure 8 This is a schematic diagram of the internal structure of the angle grinder's operating components when they are in the first position, provided in another embodiment.

[0025] Figure 9 yes Figure 8 A schematic diagram of the internal structure of the provided angle grinder's operating components when in the second position;

[0026] Figure 10 This is a three-dimensional structural diagram of an angle grinder provided in another implementation method. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. (Refer to...) Figures 1 to 3 This invention proposes a power tool, specifically an angle grinder 100. The angle grinder 100 includes a housing 110, a motor 120, and a working assembly 130, as shown in the figure. Figure 7 The motor 120 is supported by the housing 110 and can rotate around the first straight line 101. The motor 120 drives the working component 130 to operate.

[0029] The working assembly 130 includes an output shaft and a working attachment. The motor 120 drives the working attachment to rotate via the output shaft for grinding operations. The output shaft 110 extends along a second axis. The output shaft supports the working attachment and drives it to rotate about the second axis. The working attachment can be one or a combination of a grinding disc, drill bit, saw blade, grinding wheel, polishing wheel, brush head, and polishing cloth. The working attachment is driven to rotate by the output shaft to perform grinding, polishing, and other operations on the workpiece. The angle grinder also includes a transmission device that connects the motor and the output shaft and transmits the output torque of the motor shaft to the output shaft, thereby causing the motor to drive the output shaft to rotate about the second axis. The transmission device includes meshing bevel gears that connect the motor shaft and the output shaft, respectively, so that the rotation axis of the output shaft can be set perpendicular to the rotation axis of the motor shaft.

[0030] Reference Figure 3 , Figure 4 as well as Figure 5The angle grinder 100 also includes a switch assembly 140 and an operating assembly 150. The switch assembly 140 controls the opening of the motor 120, and the operating assembly 150 is operated by the user to trigger the switch assembly 140. The switch assembly 140 includes a contact 141, a diaphragm 142, and an encapsulation 143. The diaphragm 142 is a deformable material, such as a metal spring, which can be pushed by the operating assembly 150 to deform and contact the contact 141. The encapsulation 143, the diaphragm 142, and the contact 141 are installed inside the encapsulation 143, thereby positioning the diaphragm 142 relative to the encapsulation 143, so that the diaphragm 142 is positioned to make contact with the contact 141 through deformation.

[0031] Reference Figure 2 and Figure 6 The angle grinder 100 also includes a circuit board 160, on which a drive circuit is mounted. Contacts 141 are the positive and negative terminals of the drive circuit. When the diaphragm 142 is pushed to contact the contacts 141 of the drive circuit, the drive circuit is activated, thereby turning on the motor 120 and driving the working component 130 to operate. A switch component 140 is mounted on the circuit board 160, and a package 143 is connected to the surface of the circuit board 160, such that the contacts 141 are located within the package 143. The diaphragm 142 is installed within the package 143 and positioned close to the contacts 141. When the operating component 150 is not operated, the diaphragm 142 is in a first state, and the diaphragm 142 is not in contact with the contacts 141; at this time, the drive circuit is in an open state. The user controls the operating component 150 to push the diaphragm 142 to deform, causing the diaphragm 142 to enter a second state. The deformed diaphragm 142 contacts the contacts 141, activating the drive circuit and thus controlling the motor 120 to start.

[0032] Reference Figure 5 The switch assembly 140 also includes a button 144, which connects to or contacts a diaphragm 142. The diaphragm 142 is disposed between the button 144 and the contact 141. The operating component deforms the diaphragm 142 by pushing the button 144. The button 144 can fit snugly against the diaphragm 142. Because the diaphragm 142 is small, the button 144 can sufficiently deform the diaphragm 142, preventing insufficient contact between the operating component 150 and the abrasive plate, which could cause the switch assembly 140 to malfunction.

[0033] Reference Figure 2The switch assembly 140 has a small overall size and a short stroke, meaning the button 144 can only be pushed a small distance, with a stroke of less than or equal to 1 mm and greater than or equal to 0.2 mm. Because of its small size, the angle grinder 100 using the switch assembly 140 can be relatively reduced in size, making the angle grinder 100 lighter and more portable. The position of the switch assembly 140 within the angle grinder 100 is also more flexible. Optionally, the housing 110 includes a grip 111, a motor housing 112, and a power connection 113 for connecting to a power source. The grip 111 is for the user to hold, and the motor 120 is installed within the motor housing 112. When designing the structure of the angle grinder 100, the switch assembly 140 can be placed within the motor housing 112, the grip 111, or the power connection 113, depending on the overall layout requirements.

[0034] Reference Figure 3 The operating component 150 includes a push button 151 and an extension rod 152. The push button 151 can be pushed along a direction parallel to the first straight line 101. The extension rod 152 is connected to the push button 151, and the end of the extension rod 152 is used to trigger the switch component 140. The push button 151 and the switch component 140 can be spaced a certain distance apart in the axial direction of the first straight line 101, and the extension rod 152 enables the push button 151 to trigger the switch component 140. A motor housing 112 is disposed at the front end of the grip 111, and the motor housing 112 is closer to the working component than the grip 111. The switch component 140 can be disposed in the grip 111, and the push button 151 is disposed around the periphery of the motor housing 112. Optionally, the angle grinder 100 includes a grip 111, a motor 120 is disposed within the grip 111, and the switch component 140 is also disposed within the grip 111.

[0035] Because the travel of the switch assembly 140 is small, the conditions for triggering the switch assembly 140 are relatively strict. If the position of the operating assembly 150 relative to the switch assembly 140 deviates due to assembly problems or long-term use, the operating assembly 150 will fail to trigger the switch assembly 140. Because the travel of the switch assembly 140 is too small, the operating assembly 150 has a poor feel, and the user's ability to push the operating assembly 150 is short, making both the operating assembly 150 and the switch assembly 140 prone to damage. This can also lead to situations such as the angle grinder failing to start, accidental activation, and unexpected shutdown. To address this, the angle grinder 100 provided by this invention also includes an elastic element 180, which is disposed between the button 144 and the operating assembly 150. The operating assembly 150 is connected to the elastic element 180, and the operating assembly 150 can move to at least a first position and a second position. When the operating assembly 150 is in the first position, it is in its initial position, the button 144 is not pressed, and the contact 141 and the diaphragm 142 are not in contact. When the user needs to start the angle grinder 100, pushing the push button 151 moves the operating component 150 to the second position. At this time, the extension rod 152 is pushed by the push button 151, causing the elastic element 180 to deform. The elastic element 180 then pushes the button 144 to press the diaphragm 142, thereby starting the motor 120. By setting the elastic element 180, the overall reliability of the operating component 150 can be improved, the stroke of the operating component 150 can be relatively extended, and the user's feel when using the angle grinder 100 can be improved. The elastic element 180 can buffer the pressure applied by the user to the switch component 140, effectively protecting components such as the diaphragm 142 and the button 144, and extending the service life of the switch component 140. Simultaneously, the button 144 indirectly contacts the push button 151 through the elastic element 180, ensuring that the switch component 140 will not reset due to vibration during the operation of the angle grinder 100, leading to abnormal shutdown. The elastic element 180 can be a spring, compression spring, tension spring, torsion spring, spiral spring, etc., or a rubber ring, steel wire, air bladder, etc.

[0036] Reference Figure 6 The switch assembly 140 is relatively small, with a height L1 less than or equal to 10mm and greater than or equal to 3mm. The height of the switch assembly 140 is the vertical distance from its highest point to the upper surface of the circuit board 160 on which it is located. Compared to the motor 120 switch of a traditional angle grinder 100, the overall size of the switch assembly 140 is smaller, allowing it to be installed in multiple positions within the angle grinder 100 without occupying internal space. This effectively reduces the size and weight of the angle grinder 100, thus reducing the load on the user. Compared to the high-current switches of traditional angle grinders, the switch assembly proposed in this invention is lower in cost, offers improved safety, and has a longer lifespan.

[0037] The extension rod 152 and the elastic element 180 are two relatively independent components, with the extension rod 152 capable of contacting the elastic element 180. The button 144 can be pushed along a first direction to activate the motor 120. The first direction is radial in the direction of a first straight line 101. The elastic element 180 includes an inclined surface that contacts the extension rod 152, and the distance between the inclined surface and the extension rod 152 gradually decreases along the first direction in the radial direction of the first straight line 101. When the extension rod 152 is moved along the first direction by user operation, the extension rod 152 contacts and presses against the inclined surface, thereby changing the position and shape of the elastic element 180 to push the button 144 to activate the motor 120.

[0038] When the operating component 150 is in the first position, the extension rod 152 and the elastic element 180 are not in contact. When the operating component 150 is in the second position, the extension rod 152 contacts the elastic element 180 and pushes the elastic element 180 to deform, thereby pushing the button 144. Optionally, when the operating component 150 is in both the first and second positions, the extension rod 152 abuts against the elastic element 180. During the process of the operating component 150 moving from the first position to the second position, the extension rod 152 pushes the elastic element 180 to deform, thereby pushing the button 144.

[0039] The operating component 150 also includes a reset element 181, which is connected to the button 144 or the push rod. The reset element 181 is made of an elastic material, such as a spring, compression spring, or tension spring. When the user controls the operating component 150 to move from the first position to the second position, the reset element 181 is compressed. After the user releases the switch, the reset element 181 is released, causing the operating component 150 to reset to the first position.

[0040] In one embodiment of the present invention, reference is made to Figure 8 and Figure 9 The switch assembly 140a has two components: a first switch 145 and a second switch 146. The first switch 145 includes a first contact, a first diaphragm, and a first encapsulation. The second switch 146 includes a second contact, a second diaphragm, and a second encapsulation. The extension rod 152a includes a connecting portion that can contact the first switch 145 and the second switch 146. The operating assembly 150a can be operated by the user to a first position and a second position. When the operating assembly 150a is in the first position, the connecting portion abuts against the first switch 145, at which point the first contact and the first diaphragm are in contact, controlling the motor to close. When the operating assembly 150a is in the second position, the connecting portion abuts against the second switch 146, at which point the second contact and the second diaphragm are in contact, turning on the motor. This allows the operating assembly 150a to actuate two or more switch assemblies in different movement positions.

[0041] Optionally, the extension rod 152a and the elastic element are integrally formed, and the end of the extension rod 152a is made of an elastic material, or the entire extension rod 152a is made of an elastic material. When the operating component 150a is in the first position, the elastic element and the button 144a are not in contact. When the operating component 150a is in the second position, the elastic element abuts against the button 144a. When the elastic element abuts against the button 144a, it is in a compressed state, so that pressing the button 144a will turn on the motor.

[0042] Optionally, the extension rod and the elastic element are two relatively independent components, with the extension rod capable of contacting the elastic element. The button can be pushed along a first direction to activate the motor. The first direction is the radial direction of a first straight line. The elastic element includes an inclined surface that contacts the extension rod, the distance between the inclined surface and the extension rod gradually decreasing along the first direction in the radial direction of the first straight line.

[0043] Optionally, the operating components do not include an extension rod; the push button directly causes the elastic element to deform, and the elastic element pushes the button to trigger the switch assembly.

[0044] Optionally, the switch assembly can be pushed in the axial direction of the first straight line, at which time the deformation direction of the elastic element is adjusted accordingly.

[0045] Optionally, the switch assembly 140a does not have a package, and the diaphragm is directly positioned and supported by the circuit board.

[0046] Optional, refer to Figure 10 The operating components include a trigger 151b and an extension rod. The user can press the trigger to move the extension rod, at which time the extension rod has a displacement in the radial direction of the first straight line.

[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0049] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An angle grinder, comprising: a housing, a motor supported by the housing; a switch assembly to control the opening of the motor; an operation assembly to be operated to trigger the switch assembly; characterized in that: the switch assembly comprises: a contact, a diaphragm to be pushed by the operation assembly to deform to contact the contact, an encapsulation, the diaphragm and the contact are installed in the encapsulation; the stroke of the switch assembly is less than or equal to 1mm and greater than or equal to 0.2mm; further comprising: a resilient member arranged between the operation assembly and the switch assembly; the motor can rotate around a first straight line, the operation assembly comprises: a push button and an extension rod, the push button can be pushed along a direction parallel to the first straight line, the extension rod can be driven by the push button to move along the first straight line, the end of the extension rod contacts the resilient member to drive the resilient member to deform and in turn push the diaphragm to deform, to relatively extend the stroke of the operation assembly; the height of the switch assembly is less than or equal to 10mm and greater than or equal to 3mm, the deformation direction of the diaphragm is arranged at an angle to the direction of the first straight line.

2. The angle grinder as claimed in claim 1, characterized in that: The angle grinder further comprises a circuit board, and the switch assembly is installed on the circuit board.

3. The angle grinder as claimed in claim 1, characterized in that comprising: a button connected to or in contact with the diaphragm; a resilient member arranged between the button and the operation assembly.

4. The angle grinder as claimed in claim 3, characterized in that The extension rod can move along the first straight line, and the projection of the motor in the radial direction of the first straight line at least partially overlaps.

5. The angle grinder as claimed in claim 3, characterized in that The extension rod and the resilient member are integrally formed.

6. The angle grinder of claim 1, wherein The motor can rotate around a first straight line, the operation assembly comprises: a push button and an extension rod, the push button can be pushed along a direction parallel to the first straight line, the extension rod is connected to the push button.

7. An angle grinder, comprising: a housing, a motor supported by the housing; a switch assembly to control the opening of the motor; an operation assembly to be operated to trigger the switch assembly; a circuit board installed with a driving circuit; characterized in that: the switch assembly comprises: a contact, a diaphragm to be pushed by the operation assembly to deform to contact the contact; the switch is installed on the circuit board; the stroke of the switch assembly is less than or equal to 1mm and greater than or equal to 0.2mm; further comprising: a resilient member arranged between the operation assembly and the switch assembly; the motor can rotate around a first straight line, the operation assembly comprises: a push button and an extension rod, the push button can be pushed along a direction parallel to the first straight line, the extension rod can be driven by the push button to move along the first straight line, the end of the extension rod contacts the resilient member to drive the resilient member to deform and in turn push the diaphragm to deform, to relatively extend the stroke of the operation assembly; the height of the switch assembly is less than or equal to 10mm and greater than or equal to 3mm, the deformation direction of the diaphragm is arranged at an angle to the direction of the first straight line.

8. The angle grinder of claim 7, the operation assembly can trigger 2 or more of the switch assemblies at different movement positions respectively.

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