CN219659694U

CN219659694U - DC integrated switch of angle grinder and garden tool

Info

Publication number: CN219659694U
Application number: CN202320850988.5U
Authority: CN
Inventors: 郑春开; 黄邦然; 陈玉生; 陈志豪; 陈鹏程
Original assignee: Kedu Electric Co Ltd
Current assignee: Kedu Electric Co Ltd
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-09-08
Anticipated expiration: 2033-04-12

Abstract

The utility model provides a direct current integrated switch of an angle grinder and a gardening tool, which comprises the following components: the switch module comprises a switch shell, a first circuit board and a trigger piece, wherein the trigger piece is movably arranged on the switch shell under the action of external force, and a sensing circuit for sensing the movement of the trigger piece and outputting a sensing signal to the power module is arranged on the first circuit board; the power module comprises a second circuit board, a main control circuit and at least one power switch device, wherein the main control circuit and the at least one power switch device are arranged on the second circuit board, and the main control circuit is used for receiving a sensing circuit signal and outputting a control signal in response to the received sensing circuit signal so as to control the power switch device, and the power switch device is used for supplying power from a power supply system to the motor; the moving direction of the trigger piece is consistent with the length direction of the second circuit board. Compared with the traditional mode of separating the switch module from the power module, the switch module and the power module are integrated on the circuit board, the structure is simpler, and the production cost is reduced.

Description

DC integrated switch of angle grinder and garden tool

Technical Field

The utility model relates to the technical field of electric tools, in particular to a direct current integrated switch of an angle grinder and a garden tool.

Background

An angle grinder, also called grinder or disc grinder, is a portable electric tool for cutting and polishing glass fibre reinforced plastic, and is mainly used for cutting, grinding and brushing metal and stone material.

The angle grinder switch is a control device for starting or closing an angle grinder motor, the existing angle grinder switch comprises a mechanical switch and a control circuit board which are independently arranged, the mechanical switch comprises a button and a rocker, the rocker is driven to swing by pressing the button so as to drive the contact or separation of a dynamic terminal and a static terminal, and therefore connection or disconnection of a circuit is achieved; the mechanical switch and the control circuit board are of split structures and are connected through a wire, and the product has a complex structure and occupies a large space; in addition, the split structure also makes the whole machine complex to assemble, the line between the switch module and the power module is long, the impedance on the line is large, and the switch energy consumption is high.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defects of complex structure and high production cost of the cornea switch in the prior art, thereby providing the direct current integrated switch of the angle grinder and the garden tool, which has simple structure and low production cost.

The utility model provides a direct current integrated switch of an angle grinder and a garden tool, which comprises a switch module and a power module, wherein the switch module comprises a switch shell, a first circuit board and a trigger piece, the trigger piece is movably arranged on the switch shell under the action of external force, and a sensing circuit for sensing the movement of the trigger piece and outputting a sensing signal to the power module is arranged on the first circuit board; the power module comprises a second circuit board, a main control circuit and at least one power switching device, wherein the main control circuit and the at least one power switching device are arranged on the second circuit board, and the main control circuit is used for receiving the sensing circuit signal and responding to the received sensing circuit signal to output a control signal so as to control the power switching device, and the power switching device is used for supplying power from a power supply system to a motor; the moving direction of the trigger piece is consistent with the length direction of the second circuit board.

The first circuit board and the second circuit board are the same circuit board.

The switch module comprises at least two switch units, wherein the main control circuit can drive the motor to run only when at least two switch units are in an on state.

The switch module comprises a sensing piece and a triggering piece, wherein the sensing piece is a contact piece arranged on the first circuit board, and the triggering piece is a contact head contacted with the contact piece.

The contact piece is made of a metal material or a carbon film.

The switch module comprises a sensing piece and a triggering piece, wherein the sensing piece is a Hall element, and the triggering piece is a magnet.

And a sealing gasket which is arranged around the sensing piece and the triggering piece is arranged between the switch shell and the first circuit board.

The switch module further comprises a movable piece and a spring, the movable piece moves relative to the switch shell under the action of external force, and the trigger piece is fixedly arranged on the movable piece; one end of the spring is propped against the switch shell, and the other end of the spring is propped against the movable piece.

The power switching device is a MOSFET.

The technical scheme of the utility model has the following advantages:

1. according to the direct-current integrated switch of the angle grinder and the garden tool, the sensing circuit is arranged on the first circuit board, the sensing circuit can sense the movement of the trigger piece and output the sensing signal to the power module, the main control circuit of the power module receives the sensing circuit signal and outputs the control signal in response to the received sensing circuit signal so as to control the power switch device, and the power switch device supplies power to the motor from the power supply system.

2. According to the direct-current integrated switch of the angle grinder and the gardening tool, the first circuit board and the second circuit board are the same circuit board, so that long wires in the prior art are omitted, the structure is more compact, the circuit impedance is reduced, and the energy consumption of the switch is low.

3. The direct-current integrated switch of the angle grinder and the garden tool provided by the utility model has the advantages that the switch module comprises at least two switch units, wherein the main control circuit can drive the motor to run only when the at least two switch units are in the on state, so that the false connection is avoided, and the safety performance is improved.

4. According to the direct-current integrated switch of the angle grinder and the gardening tool, the sealing gasket which is arranged around the sensing piece and the triggering piece is arranged between the switch shell and the first circuit board, so that the effect of dust prevention is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a DC integrated switch of an angle grinder of the present utility model;

FIG. 2 is a cross-sectional view of the DC integrated switch of the angle grinder;

FIG. 3 is a schematic diagram of an exploded construction of the DC integrated switch of the angle grinder;

FIG. 4 is a perspective view of two trigger pieces and a circuit board;

FIG. 5 is a schematic diagram of a circuit board;

FIG. 6 is a schematic diagram illustrating the cooperation of the trigger and the sensing element;

fig. 7 is a schematic circuit diagram of a dc integrated switch of the angle grinder.

Reference numerals illustrate: 1. a switch housing; 2. a first circuit board; 3. a trigger; 4. a second circuit board; 5. a power switching device; 6. a sensing member; 7. a sealing gasket; 8. a movable member; 10. a spring; 11. a first switching unit; 12. a second switching unit; 13. a first contact; 14. a first contact piece; 15. a second contact piece; 16. a second contact; 17. a third contact piece; 18. and a fourth contact piece.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Examples

The embodiment provides a direct current integrated switch of an angle grinder and a gardening tool, which is shown in fig. 1 and 2 and comprises a switch module and a power module.

The switch module, as shown in fig. 2 and 3, includes a switch housing 1, a first circuit board 2, a trigger member 3, a movable member 8, and a spring 10. The movable piece 8 moves relative to the switch shell 1 under the action of external force, the trigger piece 3 is fixedly arranged on the movable piece 8, one end of the spring 10 is propped against the switch shell 1, and the other end is propped against the movable piece 8; as shown in fig. 3, the trigger member 3 is movably mounted on the switch housing 1 under the action of an external force, a sensing circuit for sensing the movement of the trigger member 3 and outputting a sensing signal to the power module is arranged on the first circuit board 2, the sensing circuit comprises a sensing member 6, the sensing member 6 is a contact piece arranged on the first circuit board 2, and the trigger member 3 is a contact with the contact piece. In this embodiment, the trigger 3 is a brush, and the contact piece is copper foil or carbon film. As an alternative embodiment, the contact piece may be made of a metal material capable of conducting electricity, such as gold foil or silver foil.

As an alternative embodiment, the sensing element 6 is a hall element, and the triggering element 3 is a magnet, and when the magnet moves toward or away from the hall element, the hall element can sense a change in magnetic field intensity, thereby outputting a sensing signal. The switch module may be a contactless travel switch such as a proximity switch.

As shown in fig. 2, the moving direction of the trigger piece 3 is set towards the power module, in this embodiment, the moving direction of the trigger piece 3 is consistent with the length direction of the circuit board, for a conventional percussion drill, the button must be set at the side of the handle, and the circuit board is vertically set in the handle, that is, the pressing direction of the button is set perpendicular to the length direction of the circuit board; in the case of the angle grinder, the push button does not have to be provided on the side of the handle, and therefore, the moving direction of the trigger 3 can be aligned with the longitudinal direction of the circuit board (as shown in fig. 5, the moving direction of the trigger 3 is aligned with the X-axis direction).

The power module, as shown in fig. 2 and 3, includes a second circuit board 4, and a main control circuit and at least two power switching devices 5 disposed on the second circuit board 4, where the main control circuit is configured to receive the sensing circuit signal and output a control signal in response to the sensing circuit signal to control the power switching devices 5, and the power switching devices 5 supply power from a power supply system to a motor. In this embodiment, the first circuit board 2 and the second circuit board 4 are the same circuit board, so that a long wire in the prior art is omitted, the structure is more compact, the circuit impedance is reduced, and the switching energy consumption is small. In this embodiment, the power switch device 5 is a MOSFET.

As an alternative embodiment, the first circuit board 2 and the second circuit board 4 may be two circuit boards, and the two circuit boards are assembled through pins and sockets, or may be connected through wires.

In this embodiment, as shown in fig. 7, the switch module includes a first switch unit 11 and a second switch unit 12, where the main control circuit can only drive the motor to run when the first switch unit and the second switch unit are in the on state, so that the situation that metal particles are generated due to friction between the brush and the copper foil and short circuit is avoided, and safety performance is improved. In this embodiment, two contacts are disposed on the movable member 8, and two sets of copper foils disposed corresponding to the two contacts are disposed on the first circuit board 2. It should be noted that the number of the switch units may be 1, 2, 3 or more, and may be flexibly selected according to actual requirements.

In this embodiment, as shown in fig. 6, the first switch unit 11 includes a first contact 13, a first contact piece 14 and a second contact piece 15, the second switch unit 12 includes a second contact 16, a third contact piece 17 and a fourth contact piece 18, the first contact piece 14, the second contact piece 15, the third contact piece 17 and the fourth contact piece 18 are sequentially arranged in parallel from top to bottom, and the right ends of the contact pieces are located on the same vertical line, and the length is as follows: length of the first contact piece 14 = length of the third contact piece 17 < length of the second contact piece 15 = length of the fourth contact piece 18. In this embodiment, the first switch unit 11 wakes up the main control circuit after being turned on, the main control circuit detects the working state of the second switch unit 12, and drives the motor to operate when detecting that the second switch unit 12 is turned on.

As shown in fig. 2 and 3, a gasket 7 is disposed between the switch housing 1 and the first circuit board 2 and around the sensing member 6 and the triggering member 3, thereby playing a role in dust prevention.

The working principle of the error-connection-preventing direct current integrated switch of the embodiment is as follows:

in the initial state as described in the left side of fig. 6, one antenna of the first contact 13 is not in contact with the first contact piece 14, and the other antenna is in contact with the left end of the second contact piece 15; one antenna of the second contact 16 is not in contact with the third contact piece 17, and the other antenna is in contact with the left end of the fourth contact piece 18;

the movable part 8 is manually driven to move rightwards, so that the two feelers of the first contact 13 are respectively in contact communication with the first contact piece 14 and the second contact piece 15, and meanwhile, the two feelers of the second contact 16 are respectively in contact communication with the third contact piece 17 and the fourth contact piece 18, the first switch unit 11 wakes up the main control circuit to supply power, and the driving motor is started after the main control circuit judges that the second switch unit 12 is in a connected state.

As an alternative embodiment, the second switching unit 12 may also be used to wake up the main control circuit, which detects the operating state of the first switching unit 11, and when detecting that the first switching unit 11 is turned on, drives the motor to operate.

According to the direct-current integrated switch of the angle grinder and the garden tool, the sensing circuit is arranged on the first circuit board 2, the sensing circuit can sense the movement of the trigger piece 3 and output a sensing signal to the power module, the main control circuit of the power module receives the sensing circuit signal and outputs a control signal in response to the received sensing circuit signal so as to control the power switch device 5, and the power switch device 5 supplies power to the motor from the power supply system.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The utility model provides a direct current integrated switch of angle grinder and garden instrument which characterized in that includes:

the switch module comprises a switch shell (1), a first circuit board (2) and a trigger piece (3), wherein the trigger piece (3) is movably arranged on the switch shell (1) under the action of external force, and a sensing circuit for sensing the movement of the trigger piece (3) and outputting a sensing signal to the power module is arranged on the first circuit board (2);

the power module comprises a second circuit board (4), a main control circuit and at least one power switch device (5), wherein the main control circuit and the at least one power switch device are arranged on the second circuit board (4), the main control circuit is used for receiving the sensing circuit signals and outputting control signals to control the power switch device (5) in response to the received sensing circuit signals, and the power switch device (5) is used for supplying power from a power supply system to a motor;

the moving direction of the trigger piece (3) is consistent with the length direction of the second circuit board (4).

2. The direct current integrated switch of an angle grinder and a gardening tool according to claim 1, characterized in that the first circuit board (2) and the second circuit board (4) are the same circuit board.

3. The direct current integrated switch of angle grinder and garden tool according to claim 1 or 2, wherein the switch module comprises at least two switch units, wherein the main control circuit can drive the motor to operate only when at least two of the switch units are in an on state.

4. The direct current integrated switch of an angle grinder and a gardening tool according to claim 1, characterized in that the switch module comprises a sensing piece (6) and a triggering piece (3), wherein the sensing piece (6) is a contact piece arranged on the first circuit board (2), and the triggering piece (3) is a contact in contact with the contact piece.

5. The direct current integrated switch for angle grinder and gardening tool as claimed in claim 4, wherein said contact piece is a metal material or a carbon film.

6. The direct current integrated switch of an angle grinder and a gardening tool according to claim 1, characterized in that the switch module comprises a sensing element (6) and the triggering element (3), wherein the sensing element (6) is a hall element, and the triggering element (3) is a magnet.

7. Direct-current integrated switch of angle grinder and garden tool according to any one of claims 4-6, characterized in that a gasket (7) is arranged between the switch housing (1) and the first circuit board (2) surrounding the sensing element (6) and the triggering element (3).

8. The direct current integrated switch of an angle grinder and garden tool of claim 1, wherein said switch module further comprises:

the movable piece (8) moves relative to the switch shell (1) under the action of external force, and the trigger piece (3) is fixedly arranged on the movable piece (8);

and one end of the spring (10) is propped against the switch shell (1), and the other end of the spring is propped against the movable piece (8).

9. The direct current integrated switch of angle grinder and garden tool according to claim 1, characterized in that the power switching device (5) is a MOSFET tube.