Safety control module applied to grass trimmer with front motor and grass trimmer

Abstract

According to the safety control module applied to the grass trimmer with the front motor and the grass trimmer, a main handle switch and an auxiliary handle switch are arranged, when a user needs to close the main handle switch and the auxiliary handle switch at the same time, a controller can control a power supply circuit of the motor of the grass trimmer to be switched on, and the motor can work; in this way, the working safety of the grass trimmer can be greatly improved, safety risks caused by the fact that a user operates the grass trimmer with one hand are avoided, and safety risks caused by starting of the grass trimmer due to the fact that the switch is touched by mistake are also avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric tools, and particularly relates to a safety control module applied to a front motor grass trimmer and the grass trimmer. BACKGROUND

[0002] With the replacement of new and old energy, the electric grass trimmer is more and more favored by users due to its low noise, and is currently very popular on the market and is widely used in various gardens. Most of the grass trimmers on the market have a single start switch, and when the user accidentally touches the switch, the motor of the grass trimmer may start unexpectedly, which poses a certain safety risk. In view of the above problems, it is necessary to develop a more secure and reliable front motor grass trimmer control module. SUMMARY

[0003] The utility model at first solves the technical problem that provides a kind of safety control module applied to front motor grass trimmer, solves the technical problem that the switch of single start switch grass trimmer is touched by mistake and leads to the safety risk when grass trimmer starts.

[0004] To solve the above technical problems, the utility model adopts the technical scheme that the safety control module applied to front motor grass trimmer includes mutually connected power supply, power management chip, motor, MOS tube, the gate of MOS tube is connected on a controller, is controlled by controller, still connect a main handle switch and a vice handle switch on the controller, the power management chip provides control voltage to the other end of main handle switch and vice handle switch, when main handle switch and vice handle switch are closed, controller controls MOS tube conduction, and starts motor.

[0005] As a preferred scheme, the positive electrode end of the vice handle switch is connected to the negative electrode end of the main handle switch, and the positive electrode end of the vice handle switch is also connected to a capacitor, and the negative electrode end of the capacitor is grounded.

[0006] As a preferred scheme, the vice handle switch is a speed regulating handle for electric bicycles.

[0007] The utility model further solves the technical problem that provides front motor grass trimmer, solves the technical problem that the switch of single start switch grass trimmer is touched by mistake and leads to the safety risk when grass trimmer starts.

[0008] The utility model discloses a technical scheme that is adopted to solve the above technical problems: a grass beater, including connecting rod, the motor seat of connecting in the front end of connecting rod, the motor of connecting on the motor seat, the battery package shell of connecting in the rear end of connecting rod and the main handle of connecting on the battery package shell, still vertically connecting with the auxiliary handle on the connecting rod, the main handle is perpendicular with the auxiliary handle each other, the battery package and circuit board are provided in the battery package shell still including above-mentioned safety control module, power management chip, MOS pipe, controller all are arranged on the circuit board.

[0009] The utility model discloses the beneficial effect is: the utility model discloses through setting up main handle switch and auxiliary handle switch, when user needs to close main handle switch and auxiliary handle switch simultaneously, only will the controller control grass beater motor's power supply circuit conduction, and the motor will work, and this can improve the work safety of grass beater greatly, avoids the security risk that user single -handed operation grass beater brought, also avoids the security risk that grass beater starts to bring because of switch being mistaken touch. BRIEF DESCRIPTION OF DRAWINGS

[0010] The specific embodiment of the utility model will be further explained in detail below in combination with the drawings, wherein:

[0011] Fig. 1 It is the circuit diagram of safety control module described in example 1;

[0012] Fig. 2 It is the circuit diagram of safety control module described in example 2;

[0013] Fig. 3 It is the structure schematic diagram of example 3 grass beater;

[0014] Figs. 1-3 Middle: 1, power supply;2, power management chip;3, motor;4, MOS pipe;5, controller;6, main handle switch;7, auxiliary handle switch;8, capacitor;9, connecting rod;10, motor seat;11, battery package shell;12, main handle;13, auxiliary handle. DETAILED DESCRIPTION

[0015] The specific implementation scheme of the utility model will be described in detail below in combination with the drawings. Example 1

[0016] As Fig. 1The safety control module shown in the figure is applied to a front-motor lawn mower, and includes a power supply 1, a power management chip 2, a motor 3, and a MOS tube 4 connected in series. The gate of the MOS tube 4 is connected to a controller 5 and is controlled by the controller 5. The controller 5 is also connected to a main handle switch 6 and a sub-handle switch 7. The power management chip 2 provides a control voltage V+ to the main handle switch 6 and the sub-handle switch 7 according to one end of the controller 5. When the main handle switch 6 and the sub-handle switch 7 are both closed, the controller 5 controls the MOS tube 4 to turn on and start the motor 3.

[0017] The power management chip 2 described in this embodiment is a purchased part and is a common electrical component. It is a chip that is responsible for the conversion, distribution, detection and other power management responsibilities of electric energy in the electronic equipment system.

[0018] In the safety control module described in this embodiment 1, the main handle switch 6 and the auxiliary handle switch 7 are respectively arranged on the main handle and the auxiliary handle of the lawn mower. The user must hold the main handle and the auxiliary handle with both hands respectively to close the main handle switch 6 and the auxiliary handle switch 7 at the same time. In this case, the user can hold the lawn mower stably and will not feel unstable after starting the motor of the lawn mower, effectively avoiding the safety risks caused by the lawn mower being accidentally started due to the switch being accidentally touched. Example 2

[0019] like Fig. 2 The safety control module shown in the figure is applied to a front-motor lawn mower. Its structure is similar to that of Example 1, except that the positive terminal of the auxiliary handle switch 7 in this embodiment is connected to the negative terminal of the main handle switch 6, and the positive terminal of the auxiliary handle switch 7 is also connected to a capacitor 8, the negative terminal of the capacitor 8 is grounded, and the auxiliary handle switch 7 in this embodiment is a speed control handle for an electric bicycle.

[0020] The use of an electric bicycle speed control handle as the auxiliary handle switch 7 can achieve the adjustment of the speed of the motor 3, and the positive terminal of the auxiliary handle switch 7 is connected to the negative terminal of the main handle switch 6. The positive terminal of the auxiliary handle switch 7 is also connected to a capacitor 8. This is to avoid the safety risk caused by the auxiliary handle switch 7 closing the main handle switch 6 before the main handle switch 6 is closed and adjusted to a certain speed gear, thereby closing the main handle switch 6 and starting the motor 3 at a higher speed. After the capacitor 8 is set, even if the auxiliary handle switch 7 is adjusted to a certain speed gear in advance, when the main handle switch 6 is closed, the capacitor 8 will be charged first, causing the voltage on the auxiliary handle switch 7 to slowly increase, thereby causing the voltage output by the auxiliary handle switch 7 to the controller 5 to slowly increase. The controller 5 then controls the motor 3 to start at a low speed based on the strength of the electrical signal sent by the auxiliary handle switch 7. Example 3

[0021] like Fig. 3The shown grass trimmer is characterized in that it comprises a connecting rod 9, a motor base 10 connected to the front end of the connecting rod 9, a motor 3 connected to the motor base 10, a battery pack shell 11 connected to the rear end of the connecting rod 9, and a main handle 12 connected to the battery pack shell 11, wherein a sub-handle 13 is also vertically connected to the connecting rod 9, the main handle 12 and the sub-handle 13 are perpendicular to each other, the battery pack shell 11 is provided with a battery pack and a circuit board, and the safety control module of the above-mentioned embodiments 1 or 2 is further included, wherein the power management chip 2, the MOS tube 4, and the controller 5 are all arranged on the circuit board, and the battery pack is the power supply 1 of the above-mentioned embodiments 1 or 2.

[0022] The working process of the utility model is as follows: a user holds the main handle 12 with one hand and holds the sub-handle 13 with the other hand, closes the main handle switch 6 on the main handle 12 and the sub-handle switch 7, and after the controller 5 receives the high level sent by the main handle switch 6 and the sub-handle switch 7 at the same time, outputs the high level to the gate of the MOS tube 4, so that the MOS tube 4 is turned on, the power management module 2 adjusts the voltage of the power supply 1 to supply power to the motor 2, drives the motor 2 to rotate, and performs the grass trimming work.

[0023] When the sub-handle switch 7 is a speed regulating handle, the user can adjust the voltage sent to the controller 5 by rotating the sub-handle switch 7, and the controller 5 adjusts the duty cycle of the MOS tube 4 according to the received voltage, so as to adjust the rotating speed of the motor 2.

[0024] The above-mentioned embodiments only exemplarily illustrate the principles and effects of the present application, and part of the applied embodiments, and are not used to limit the present application; it should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A safety control module applied to a front motor grass trimmer, comprising a power supply, a power management chip, a motor and a MOS tube connected in series with each other, characterized in that, The gate of the MOS transistor is connected to a controller, and is controlled by the controller, and a main handle switch and a sub-handle switch are also connected to the controller, and the power management chip provides a control voltage to the other end of the main handle switch and the sub-handle switch, and when the main handle switch and the sub-handle switch are both closed, the controller controls the MOS transistor to be turned on, and the motor is started.

2. The safety control module of claim 1, wherein, The positive electrode end of the sub-handle switch is connected to the negative electrode end of the main handle switch, and the positive electrode end of the sub-handle switch is also connected to a capacitor, and the negative electrode end of the capacitor is grounded.

3. The safety control module according to claim 1 or 2, characterized in that, The sub-handle switch is a speed regulating handle for an electric bicycle.

4. A grass trimmer characterized by comprising: The safety control module, the power management chip, the MOS transistor and the controller are all arranged on the circuit board.

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