Self-powered wireless keyboard

Patent metadata

Field	Value
Publication number	US-11942791-B2
Application number	US-202117485485-A
Country	US
Kind code	B2
Filing date	Sep 26, 2021
Priority date	Mar 29, 2019
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A self-powered wireless keyboard by modifying the structure of a traditional membrane keyboard having a volcanic crater structure. Not damaging the original membrane keyboard structure, a micro magnet core is installed inside a cylindrical protrusion block under the key cap as a mover of the induction power generation device, and an induction coil is wound in a key slot of the keyboard base as the stator of the induction power generation device. In this way, when each key is pressed, it will produce induction current. A layer of flexible solar cell can be laid on the upper surface of the key, which can generate electricity by collecting the light energy in the surrounding environment during the time of daily illumination.

First claim

The invention claimed is:

1. A self-powered wireless keyboard, comprising:
a plurality of key units, each unit including:
a key having a lower surface and a protrusion block extending from the lower surface;
a key slot underneath the lower surface of the key and around the protrusion block;
a permanent magnet core arranged inside the protrusion block; and
an induction coil wound around the protrusion block and within the key slot, and

a power management module configured to receive induced current generated by the induction coil of each of the key units and supply power for the wireless keyboard;
where the key of each of the key units has an upper surface provided with a solar cell film, and generated current by the solar cell film is sent to the power management module;
and wherein the lower surface of the key of each of the plurality of key units is provided with two spiral coils each having an upper end and a lower end, the upper ends of the two spiral coils being respectively connected with positive and negative poles of the solar cell film, and the lower ends are connected with the power management module.

2. The self-powered wireless keyboard of claim 1 , further comprising a battery, wherein the power management module converts the received induced current into a voltage required by the battery and supplies power to the battery, and wherein the battery stores electric energy and supplies power to the wireless keyboard.

3. The self-powered wireless keyboard according to claim 1 , wherein the induced current generated by the induction coil of each of the key units is sent to the power management module through a wire laid on the bottom of the keyboard.

4. The self-powered wireless keyboard according to claim 1 , wherein the induction coils of the plurality of key units are connected in parallel.

5. The self-powered wireless keyboard according to claim 1 , wherein the solar cell film on the key of each vertical row of keys of the keyboard are connected in series into a battery group, and multiple battery groups are connected in parallel.

Assignees

• Beijing Institute Tech

Inventors

• Deng Fang
• Ji Yanxin
• Fan Xinyu
• Cai Yeyun
• Mi Chengwei
• Gao Feng
• Chen Jie
• Dou Lihua

Classifications

• H02J2101/24

  Photovoltaics · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J2105/44

  Portable electronic devices · CPC title

• H02J50/001 Primary

  Energy harvesting or scavenging · CPC title

• G06F3/0202

  Constructional details or processes of manufacture of the input device · CPC title