An ultra-thin key switch structure with a sense of pressing steps

Abstract

The invention relates to an ultrathin key switch structure having a press segmental feeling. The ultrathin key switch structure comprises a key cap, a base and a circuit board which are sequentially connected from top to bottom, two symmetric swinging pieces are arranged between the key cap and the base, the base is provided with an elastic piece, positions where outer ends of the swinging pieces are located are higher than positions where inner ends of the swinging pieces are located, and an infrared emission tube and an infrared receiving tube are arranged on the circuit board; when the key cap is pressed, the key cap drives the outer ends of the two swinging piece to swing downwards, so that the inner ends of the two swinging pieces swing upwards, light transfer states of the infrared emission tube and the infrared receiving tube are changed, and electrical signal transfer of the circuit board is achieved; and when the key cap is loosen, the inner ends of the two swinging pieces return to original positions under the effects of resilient forces of the elastic pieces, the outer ends of the two swinging pieces return to original positions, and finally, the key cap returns to an original position. The press segmental feeling can be generated when the key switch structure is pressed, and the key switch structure has a switch control function, is comfortable to use and is long in service lifetime.

Description

technical field [0001] The invention relates to the technical field of electronic equipment components, in particular to an ultra-thin key switch structure with a sense of pressing steps. Background technique [0002] Today's popular laptops and tablets require thin, durable and secure enclosures. The keyboard as an input device will occupy a large part of the available space inside the laptop or tablet computer, and the design and promotion of new products often require reducing the size of the keyboard as much as possible and simplifying the structure of the keyboard. In order to meet the increasingly demanding requirements of laptops and tablet computers, Apple Inc. has proposed a patent of a key mechanism and a butterfly assembly with the publication number CN 203588895U, which is used to provide an improved key mechanism design. Specifically, the key mechanism of this patent includes: a keycap assembly; a support structure; and a butterfly hinge comprising two separate...

AI Technical Summary

Problems solved by technology

[0004] However, because the patent adopts a butterfly hinge key mechanism, it has the following insurmountable defects: it does not have the function of pressing a paragraph, and does not have a control function with a switch. It is necessary to realize the function of the keyboard input switch and generate The step feeling of pressing (allowing the user to judge and sense the position of the switch conduction), requires an additional assembly of a traditional dome switch

As we all know, the pressing force of the dome switch is relatively large (according to the long-term use habits of the human body, the pressing force of the user's favorite keyboard switch is about 45-60 grams, while the pressing force of the dome switch is generally about 80-160 grams), and The pressing stroke is very short (0.30-0.45mm from the start of pressing to the triggering stroke), which causes the user to feel bad when inputting. Easy to cause user's wrist fatigue

At the same time, the service life of the dome switch is about 1 million to 5 million times, and it is prone to fatigue damage and failure during repeated use by the user, resulting in an increase in the cost of after-sales service, bringing a lot of inconvenience to the user, and is not conducive to a large number of Promotion and application

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