Key and keyboard

Abstract

The invention relates to the field of application of magnetic sensors, and provides a key and a keyboard. The key comprises a base body, a rotating piece, a magnetic angle sensor fixedly arranged on the base body and a moving piece movably installed on the base body along a preset track. A pressing part of the key is located on the moving piece; the rotating piece is rotatably mounted on the base body, and the moving piece is in transmission connection with the rotating piece; the rotating piece is provided with a permanent magnet. The magnetic angle sensor is used for detecting rotation of the permanent magnet. The detection performance of the magnetic angle sensor is not easily influenced by environmental factors such as temperature, so that the detection result of the scheme for detecting the motion condition is not easily changed along with the temperature change, the consistency of the detection result of the scheme in different temperature environments is relatively good, and as the detection accuracy of the magnetic angle sensor is relatively good, when a plurality of keys of the scheme are adopted to detect the same magnetic field, the consistency of detection results is good, and when the keys of the scheme are applied to a keyboard, the performance consistency of the keys is good.

Description

technical field [0001] The invention relates to the application field of a magnetic sensor, in particular to a button and a keyboard. Background technique [0002] Some existing keyboards use magnetic sensors to detect the pressing action of the keys. The more common solution is to install permanent magnets for the keys. The detection of the pressing action of the keycap is realized in a non-contact manner, which has beneficial technical effects such as waterproof, dustproof, and mechanical wear reduction. [0003] The Hall switch has two states of being triggered and not being triggered. When the keycap is in the pop-up state (the keycap is in the initial position), the Hall switch is in the untriggered state. At this time, press the keycap until the permanent magnet is close to the Hall Switch, so that the Hall switch is triggered, so that the keycap is detected to be pressed through the Hall switch. [0004] However, when the keyboard is operated quickly, the keycap may...

AI Technical Summary

Problems solved by technology

[0006] However, the magnetic sensors (Hall switch, linear magnetic sensor) of the above solutions all detect the pressing action of the keycap by sensing the intensity of the magnetic field. On the one hand, the detection of the magnetic field intensity by the magnetic sensor is easily affected by external environmental factors such as temperature Interference (commonly known as temperature drift), which leads to inconsistencies in the detection results of the magnetic sensor for the same strength magnetic field under different temperature environments, resulting in inconsistent performance of the keyboard under different temperature environments, and because the keyboard will heat up during use. , leading to obvious performance changes of the keyboard during high-intensity use such as games, especially in the scheme of using the Hall sensor to detect the pressing action of the keycap. After using for a certain period of time, the temperature rises obviously, resulting in a large change in the performance of the keyboard during use, which cannot meet the user's demand for keyboard performance.

[0007] On the other hand, due to the possible error of the magnetic field intensity detected by the magnetic sensor, the performance consistency of the magnetic field intensity detected by different magnetic sensors is poor. Even the magnetic sensors produced in the same batch will have different performances. The detection results of the magnetic field may be inconsistent, which leads to the scheme that the keyboard detects the keycap pressing action of each key by detecting the magnetic field strength through the magnetic sensor, and some keys may be detected by the magnetic sensor when the keycap is pressed for a small distance. The keycap is pressed, and other keys need to be detected by the magnetic sensor as the keycap is pressed after the keycap is pressed for most of the stroke, resulting in poor user experience; range, the magnetic field strength of the permanent magnet set on each keycap is also inconsistent, so this may further aggravate the inconsistency of the performance of each key on the same keyboard

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