Electric angle grinder with secondary action unlocking mechanism

Abstract

The invention relates to an angular polishing machine with a secondary action opening mechanism and belongs to the technical field of hand-held electric tool. The angular polishing machine comprises a shell, a motor, a transmission mechanism, a working head and a switch mechanism. The angular polishing machine is characterized in that the angular polishing machine is also provided with an error prevention opening mechanism; a button base is arranged on a shell of the error prevention opening mechanism; the inside of the button base is provided with a button switch which consists of a button, a button lever, a second offsetting spring and a limiting convex block on the button lever; a pull rod is provided with a groove moving along the button lever and a limiting hole correspondingly matched with the limiting convex block; when the button switch is in a closed state, the limiting convex block is in the limiting hole and limits the pulling of the pull rod; and when the button is pressed, the limiting convex block runs through the limiting hole so that the switch mechanism can act. In order to open the angular polishing machine, two obvious actions are needed to reliably avoid causing wrong opening by misoperation and improve the safety performance of the angular polishing machine, thus the angular polishing machine can meet the EN60745-2-3 European normal stipulation.

Description

technical field [0001] The invention belongs to the technical field of hand-held electric tools, and in particular relates to an angle grinder with a secondary action opening mechanism. Background technique [0002] In the existing angle grinder, only one action is needed to open the switch, which is to push the push button forward, so that the lock with the bump at the bottom of the push button falls into the corresponding matching bump on the casing. In the lock hole, at this time, the pull rod connected to the push button in the casing overcomes the resistance of the pull rod return spring and pulls forward. The fork at the end of the pull rod toggles the motor switch to start the motor and the angle grinder works. This kind of angle grinder, which can be opened with only one action, has great potential safety hazards, because in use, the misoperation of the switch often occurs due to negligence, so that the angle grinder can be turned on when people are unprepared. If t...

AI Technical Summary

Problems solved by technology

In order to implement the above standards, people have proposed a new technical solution for the switch of the angle grinder, such as the patent application number 200810061116.0 "Angle grinder with an anti-mis-opening switch mechanism", which is different from the existing angle grinder. Compared with the grinder, its safety performance has been improved, but the two actions of opening the switch are not obvious enough, because it is operated on a swing lever for the second opening, which can be completed continuously with the same finger, and there is a first step Press the end of the rear section of the swing lever, the lock block will leave the first lock hole, the second step pushes the switch button not in place, the lock block does not fall into the second lock hole, but rests on the wall of the second lock hole, and the operation stops for some reason situation, which will leave a hidden danger of misoperation afterwards

Images