Key structure

Abstract

The invention provides a key structure which comprises a key cap, a base and a lifting mechanism connected between the key cap and a base. The base comprises a switch, and the switch comprises a shell, a first magnetic part, a trigger support, a middle support, a conduction piece, an elastic structure and two electrical terminals. The trigger support and the middle support are arranged in a rotatable or deflectable manner. The trigger support comprises a second magnetic part and abuts against the middle support. The middle support abuts against the conduction piece. When the key cap is not pressed, a magnetic attraction force is generated between the first magnetic part and the second magnetic part, and the trigger support is driven to make the conduction piece to be away from the electrical terminal through the middle support. When the key cap is pressed, the magnetic attraction force is overcome, so that the conducting piece is driven by the elastic structure to move towards the electrical terminals so as to conduct the two electrical terminals. The pressing force applied to the key cap is irrelevant to the contact force of the contact of the trigger switch and is relevant to the resilience force of the elastic structure, so that the contact force of the conduction piece in contact with the first electrical terminal can be designed, and the effect of protecting the contact is achieved.

Description

technical field [0001] The present invention relates to a key structure, in particular to a key structure with a mechanical switch. Background technique [0002] Traditional key structures with mechanical switches usually use the keycap to trigger the switch contact directly or indirectly through the elastic knob, but regardless of the aforementioned trigger mechanism, the force exerted by the trigger switch contact is directly related to the force exerted by the user pressing the keycap. This will cause the switch contacts to experience varying amounts of contact force. This phenomenon may not only cause excessive wear on the contact surface and affect the contact resistance of the contact, but may also cause fatigue of the elastic structure connecting the contact (for example, the elastic structure such as a cantilever structure produces a contact open and closed state). Therefore, the service life of switches with this type of button structure will be shortened to varyin...

AI Technical Summary

Problems solved by technology

This phenomenon may not only cause excessive wear on the contact surface and affect the contact resistance of the contact, but may also cause fatigue of the elastic structure of the connecting contact (for example, the contact is opened and closed by elastic structures such as cantilever structures)

Therefore, the service life of switches with this type of button structure will be shortened to varying degrees with the user's habit of pressing and applying force, that is, the service life of the button structure will be shortened, and with the use of time, the user will Sensitivity of the switch with key structure decreases

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