Laptop keyboard based on Hall effect

Abstract

The invention discloses a notebook computer keyboard based on the Hall effect, and relates to the technical field of keyboards, the notebook computer keyboard comprises a magnetic axis key module, an isolation seat and a circuit board which are arranged in a notebook computer keyboard area, the magnetic axis key module is composed of a key frame and a key array fixed on the key frame, the magnetic axis key module is detachably installed above the isolation seat, the circuit board is arranged below the isolation seat, the circuit board is provided with a Hall sensor array, the positions of Hall sensors are in one-to-one correspondence with keys of the key array, and the isolation seat is made of a material which allows a magnetic field to penetrate through. The non-contact characteristic of the Hall sensor is utilized, the magnetic axis key module and the circuit board are completely separated through the isolation base, the problem of pore seepage of a traditional keyboard is thoroughly solved, the detachable magnetic axis key module is used, and the problem that an existing notebook computer keyboard is not easy to replace after being damaged is solved; and a user can conveniently replace more personalized keyboard keys.

Description

Technical Field

[0001] The present invention relates to the technical field of keyboards, and in particular to a notebook computer keyboard based on the Hall effect. Background Art

[0002] The keyboard is one of the basic input devices of a laptop computer. Through the keyboard, English letters, Chinese characters, numbers, punctuation marks, etc. can be input into the computer, so as to issue commands to the computer, input data, etc. Common laptops have a large keyboard area with many keys installed on it. These keys are fixed on the circuit board below and connected to the computer motherboard through cables. Because the keys and the circuit board cannot be isolated, there will be many pores, and it is difficult to achieve good waterproof performance. The current waterproof technology used for keyboards generally takes waterproof measures for each key separately, such as sealing the bottom of the keyboard keys with silicone rubber, or separating independent keys with hard plastic. The silicone rubber used in the silicone rubber sealing method is generally thicker, which is not suitable for laptops with high thickness requirements. Hard plastic separation solves the waterproof problem to a certain extent, but the manufacturing process and maintenance are very complicated, and it is not conducive to use in ultra-thin electronic products with high thickness requirements.

[0003] Chinese invention patent publication number CN102543542A also discloses a waterproof keyboard, which uses a film between the bottom plate and the key cover. The film covers the bottom plate, which isolates the keys from the keyboard circuit board in an integrated manner, and can play a role in waterproofing and dustproofing. However, due to the ductility of the film and the thickness of the film, which is generally less than 0.2mm, the film cannot rebound after repeated pressing of the keys, until it is damaged and loses its waterproofing effect. Summary of the invention

[0004] In order to solve the problems existing in the existing laptop keyboards, the present invention provides a laptop keyboard based on the Hall effect, which is:

[0005] A notebook computer keyboard based on the Hall effect comprises a magnetic axis key module, an isolation seat and a circuit board arranged in the keyboard area of ​​the notebook computer, wherein the magnetic axis key module is composed of a key frame and a key array fixed on the key frame, a permanent magnet is arranged at the bottom of each key of the key array, the magnetic axis key module is detachably mounted above the isolation seat, the circuit board is arranged below the isolation seat and connected to the notebook computer mainboard, the isolation seat completely isolates the magnetic axis key module and the circuit board to prevent water vapor from intruding, the circuit board is provided with a Hall sensor array, the position of the Hall sensor corresponds to the keys of the key array one by one, the isolation seat is made of a material that allows magnetic field penetration, the Hall sensor will continuously detect changes in the magnetic field, when a key is pressed causing the magnetic flux at the Hall sensor position to exceed a set threshold, the Hall sensor will notify the main control chip to detect that the key is pressed, after receiving the key notification, the main control chip can scan the entire key array through the control circuit, can accurately locate the key position and convert it into a key signal and output it to the computer.

[0006] Preferably, the isolation seat is an integrally formed structure, made of one of engineering plastics, aluminum-magnesium alloy, and carbon fiber, and is fixed to the notebook computer casing by bolts. This integrated sealing method completely prevents water vapor from intruding into the magnetic axis key module position.

[0007] Preferably, the isolation seat is provided with a groove corresponding to the magnetic axis key module, and the magnetic axis key module is connected to the isolation seat through a modular snap-fit ​​structure, and the snap-fit ​​structure includes a dovetail groove arranged at the edge of the isolation seat groove and an elastic claw corresponding to the bottom of the magnetic axis key module. The modular snap-fit ​​structure makes it possible to remove the entire magnetic axis key module, and even if water is accidentally poured onto the keyboard, it can be easily cleaned.

[0008] Preferably, the permanent magnet is a small magnetized iron sheet, the size of which matches the sensing area of ​​the Hall sensor.

[0009] Preferably, the keys of the key array and the isolation seat maintain a spacing of 0.5mm-3mm in the vertical direction.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. In the present invention, the non-contact characteristics of the Hall sensor are utilized, and the magnetic axis key module and the circuit board are completely separated by combining the engineering plastic isolation seat with the ultrasonic welding sealing structure, which completely solves the problem of liquid seepage in the pores of the traditional keyboard. At the same time, since the magnetic axis key module does not carry any circuit components, the present invention can still be used normally in a humid environment (i.e., the magnetic axis key module is wet). And the key triggering of the present invention only depends on the distance between the permanent magnet and the Hall sensor reaching the threshold, which can reduce the noise when the keyboard is used and realize silent office.

[0012] 2. The present invention uses a detachable magnetic axis key module, which solves the problem that the existing notebook computer keyboard is difficult to replace after being damaged, and facilitates users to replace more personalized keyboard keys. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is an exploded view of the assembly structure of the notebook computer in the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the notebook computer in the present invention after assembly;

[0016] Figure 3 It is a structural schematic diagram of the magnetic axis key module of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the isolation seat and the keyboard housing of the present invention;

[0018] Figure 5 It is a schematic diagram of the structure of the Hall sensor array of the circuit board of the present invention;

[0019] Figure 6 It is a schematic diagram of the Hall sensor array circuit in the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Reference Figures 1 to 6A laptop keyboard based on the Hall effect includes a magnetic axis key module arranged in the laptop keyboard area, an isolation seat and a circuit board, the magnetic axis key module is composed of a key frame and a key array fixed on the key frame, a permanent magnet is provided at the bottom of each key in the key array, the magnetic axis key module is detachably installed above the isolation seat, the circuit board is arranged below the isolation seat and connected to the laptop motherboard, the circuit board is provided with a Hall sensor array, the position of the Hall sensor corresponds one-to-one to the keys on the key array, and the isolation seat is made of a material that allows magnetic field penetration.

[0022] Specifically, the isolation seat is an integrally formed engineering plastic component, and the isolation seat is fixed to the laptop casing by bolts. Specifically, the isolation seat is equivalent to forming a complete surface in the laptop keyboard area, and is connected to the four corners of the laptop casing by bolts. The middle groove is used to place the magnetic axis key module.

[0023] Specifically, a groove corresponding to the magnetic axis button module is provided on the isolation seat, and the magnetic axis button module is connected to the isolation seat through a modular snap-fit ​​structure. The snap-fit ​​structure includes a dovetail groove arranged on the edge of the isolation seat groove and an elastic claw corresponding to the bottom of the magnetic axis button module.

[0024] Specifically, the permanent magnet arranged under the key is a small magnetized iron sheet. Since the spacing between the keyboards is small, the permanent magnet here does not need to have a strong magnetism. On the contrary, too strong magnetism will interfere with the accurate reading of the key. The size of the permanent magnet matches the sensing area of ​​the Hall sensor.

[0025] Specifically, the keys of the key array maintain a spacing of 0.5 mm from the isolation seat in the vertical direction, and a key stroke is reserved so that the keys can be pressed.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A notebook computer keyboard based on the Hall effect, comprising a magnetic axis key module, an isolation seat and a circuit board arranged in the notebook computer keyboard area, characterized in that: The magnetic axis key module is composed of a key frame and a key array fixed on the key frame. A permanent magnet is provided at the bottom of each key of the key array. The magnetic axis key module is detachably installed above the isolation seat. The circuit board is arranged below the isolation seat and connected to the mainboard of the notebook computer. The circuit board is provided with a Hall sensor array. The positions of the Hall sensors correspond one-to-one to the keys of the key array. The isolation seat is made of a material that allows magnetic field penetration.

2. The Hall effect-based notebook computer keyboard according to claim 1, characterized in that: The isolation seat is an integrally formed structure, made of one of engineering plastics, aluminum-magnesium alloy and carbon fiber, and is fixed to the notebook computer shell by bolts.

3. The Hall effect-based notebook computer keyboard according to claim 1, characterized in that: The isolation seat is provided with a groove corresponding to the magnetic axis button module, and the magnetic axis button module is connected to the isolation seat through a modular snap-fit ​​structure, and the snap-fit ​​structure includes a dovetail groove arranged at the edge of the isolation seat groove and an elastic claw correspondingly arranged at the bottom of the magnetic axis button module.

4. The Hall effect-based notebook computer keyboard according to claim 1, characterized in that: The permanent magnet is a small magnetized iron sheet, and its size matches the sensing area of ​​the Hall sensor.

5. The Hall effect-based notebook computer keyboard according to claim 1, characterized in that: The keys of the key array and the isolation seat maintain a spacing of 0.5mm-3mm in the vertical direction.

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