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Hall key

A key and Hall element technology, applied in the field of Hall keys, can solve the problems of incapable of waterproof and dustproof treatment of membrane keys, membrane keys can not work normally, small magnets, etc., and achieve good waterproof and dustproof, simple structure and low cost. Effect

Pending Publication Date: 2019-05-14
METTLER TOLEDO (CHANGZHOU) MEASUREMENT TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The membrane key is a tactile switch, and the membrane key cannot be waterproof and dustproof, otherwise the membrane key cannot work normally
[0005] The Hall button uses the Hall element and the magnet without contact, so the Hall button can be waterproof and dustproof, but because the magnetic field of the magnet has a small change rate to the distance, the switch stroke is 4mm to 5mm, while the silicone button Or the switching stroke of the membrane button is about 1mm to 2mm, so the current Hall button cannot directly replace the above-mentioned tactile button for use

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 A schematic structural diagram of the Hall button of the present invention is shown.

[0039] Such as figure 1 As shown in (a), the Hall button 100 includes a button cap 101, a first magnet 102, a second magnet 103, and a Hall element 104, wherein the first magnet 102 and the second magnet 103 are the same, but the directions of the magnetic fields are opposite , and are respectively located on opposite sides of the Hall element. The positions of the second magnet 103 and the Hall element 104 are relatively fixed, and the distance between them is h1. At this time, the Hall element 104 outputs a low level due to the magnetic field of the second magnet 103 . When the key cap 101 is not pressed, the first magnet 102 is located at the position S2, and the distance between the first magnet 102 and the Hall element 104 is h2.

[0040] Such as figure 1 As shown in (b), when the keycap 101 is pressed in the direction of the arrow in the figure, the magnetic field o...

Embodiment 2

[0049] exist figure 1In the schematic structural diagram of the Hall button 100 shown, the Hall element 104 is a switching Hall element, and its output signals are 0 and 1. When the key cap 101 is not pressed, the Hall element 104 outputs a low level 0 due to the magnetic field of the second magnet 103; when the key cap 101 is pressed, the magnetic field of the first magnet 102 begins to cancel the magnetic field of the second magnet 103 until all of them are cancelled. , at this time, the Hall element 104 outputs a high level 1; when the button cap 101 is released, the first magnet 102 rebounds, and the offset effect of the magnetic field of the first magnet 102 on the first magnet 103 disappears. At this time, the Hall The element 104 outputs a low level 0 again due to the magnetic field of the second magnet 103 .

[0050] In another embodiment, the Hall element 104 is an analog Hall element, which outputs a value. When the key cap 101 is not pressed, the Hall element 104 ...

Embodiment 3

[0056] figure 2 A schematic diagram showing another structure of the Hall button of the present invention.

[0057] The difference between the third embodiment and the first embodiment is that the first magnet 102 and the second magnet 103 in the first embodiment are identical; in the third embodiment, the magnetic force of the first magnet 202 is greater than that of the second magnet 203 .

[0058] Such as figure 2 In the Hall button 200 shown, when the button cap 201 is not pressed, the first magnet 202 is located at the position S2, and the distance between it and the Hall element 204 is h2, and the distance between the second magnet 203 and the Hall element 204 is h2. The distance is h1, at this time the Hall element 204 outputs a low level due to the magnetic field of the second magnet 203 . When the button cap 201 is pressed, the first magnet 202 moves to the S1 position, and the magnetic field of the first magnet 202 completely cancels the magnetic field of the sec...

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PUM

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Abstract

The invention provides a Hall key which comprises a Hall element, a first magnet and a second magnet, the first magnet and the second magnet are located on the two opposite sides of the Hall element respectively, and the magnetic field directions of the first magnet and the second magnet are opposite. When the Hall key is in a non-working state, the Hall element outputs a low level due to the magnetic field of the second magnet, when the Hall key is pressed, the magnetic field of the first magnet counteracts the magnetic field of the second magnet, at the moment, the Hall element outputs a high level, when the Hall key is loosened, the counteracting effect of the magnetic field of the first magnet disappears, and the Hall element outputs the low level. The switch stroke of the Hall key is0-2 mm, a touch switch such as a film key can be directly replaced, the structure is simple, the cost is low, and good waterproof and dustproof effects can be achieved.

Description

technical field [0001] The invention relates to an input device, mainly a Hall button. Background technique [0002] At present, the general-purpose buttons include mechanical buttons, silicone buttons and membrane buttons. Among them, there are mechanical switches inside the mechanical buttons, and there are metal springs inside the mechanical switches. The on and off functions are realized through the conduction or disconnection of the contacts. The process is simple, but The sound is loud, and it is not waterproof and dustproof. [0003] Silicone buttons have excellent heat resistance, cold resistance, environmental resistance, electrical insulation, fatigue resistance, etc., but still need to use the conduction or disconnection of metal contacts to realize the function of on and off, which belongs to the tactile switch , so that it cannot be sealed against water and dust. [0004] The thin film button is covered with metal points on the conductive film. When the button...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/90
Inventor 蒋志豪
Owner METTLER TOLEDO (CHANGZHOU) MEASUREMENT TECH CO LTD