A hall component capable of resisting magnetic interference and a magnetic shaft keyboard

Abstract

The utility model discloses a kind of Hall component and magnetic shaft keyboard of magnetic interference resistance, wherein, a kind of Hall component of magnetic interference resistance includes substrate, Hall element and shield case, substrate is provided with directly opposite part, Hall element and shield case are all located at the downside of directly opposite part, Hall element is located in shield case.In the above structure, after Hall component of the application is installed in magnetic shaft keyboard, shield case is used as physical barrier, the magnetic field generated by the magnet piece of target magnetic shaft (magnetic shaft is located on the upside of corresponding directly opposite part) can be guided, while the magnetic field generated by the magnet piece from adjacent magnetic shaft (whether static magnetic field or dynamic magnetic field) is blocked and weakened.This ensures that Hall element mainly senses the magnetic field change of corresponding magnet piece directly above, greatly reduces the possibility of interference caused by the action of adjacent magnetic shaft on current Hall element, therefore, it can greatly reduce or basically eliminate the problem of current Hall element false recognition, false response caused by adjacent magnetic field interference.

Description

Technical Field

[0001] This utility model relates to the field of Hall effect technology, and in particular to a Hall effect component resistant to magnetic interference and a magnetic axis keyboard. Background Technology

[0002] A magnetic axis keyboard is a type of keyboard developed based on Hall effect technology. A magnetic axis keyboard includes a base plate, multiple Hall elements and multiple magnetic axes, all disposed on the base plate. The Hall elements are positioned one-to-one with each magnetic axis below them. When a button on a magnetic axis is pressed down, the magnet on the button moves down and approaches the Hall element, causing the Hall element to sense the change in magnetic field strength and convert it into an electrical signal to trigger a response. However, the inventors discovered through in-depth research that because magnetic axis keyboards have a large number of closely spaced magnetic axes, when a user presses a particular magnetic axis, the dynamic magnetic field generated by the change in the state of the magnet (being pressed) can easily interfere with adjacent Hall elements, causing them to misidentify and respond incorrectly. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a Hall effect sensor that is resistant to magnetic interference.

[0004] This invention also proposes a magnetic axis keyboard with the Hall effect component that is resistant to magnetic interference.

[0005] According to a first aspect of the present invention, a Hall effect assembly resistant to magnetic interference includes a substrate, a Hall element, and a shield. The substrate has an opposing portion, and the Hall element and the shield are both disposed on the lower side of the opposing portion. The Hall element is disposed inside the shield.

[0006] A Hall effect component resistant to magnetic interference according to an embodiment of the present invention has at least the following beneficial effects:

[0007] With the above structure, after the Hall element of this application is installed on the magnetic axis keyboard, the shielding cover acts as a physical barrier, guiding the magnetic field generated by the magnet of the target magnetic axis (the magnetic axis located on the upper side of the corresponding opposite part), while blocking and weakening the magnetic field generated by the magnet of the adjacent magnetic axis (whether it is a static magnetic field or a dynamic magnetic field generated by state changes). This ensures that the Hall element mainly senses the magnetic field change of the corresponding magnet directly above it, greatly reducing the possibility of interference from the movement of adjacent magnetic axes to the current Hall element. Therefore, it can greatly reduce or completely eliminate the problem of incorrect identification and incorrect response of the current Hall element caused by interference from adjacent magnetic fields.

[0008] According to some embodiments of the present invention, the shielding cover is disposed over the Hall element.

[0009] According to some embodiments of the present invention, the Hall element is encapsulated within the shielding cover.

[0010] According to some embodiments of the present invention, the number of the facing portions, the Hall elements, and the shielding covers are all set to at least two. At least two Hall elements are correspondingly disposed on the lower side of at least two facing portions, at least two shielding covers are correspondingly disposed on the lower side of at least two facing portions, and at least two Hall elements are correspondingly disposed inside at least two shielding covers.

[0011] According to some embodiments of this utility model, the shielding cover is made of permalloy.

[0012] According to a second aspect of the present invention, a magnetic axis keyboard includes a magnetic axis and a Hall effect component resistant to magnetic interference as described above. The magnetic axis is disposed on the upper side of the opposite portion and is provided with a magnet that can move up and down.

[0013] The magnetic axis keyboard according to the present invention has at least the following beneficial effects: the above structure can greatly reduce or avoid the problem of accidental key presses.

[0014] According to some embodiments of the present invention, the magnet is provided with a shielding element around its periphery.

[0015] According to some embodiments of this utility model, the shielding component is made of permalloy.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a structural diagram of an embodiment of the Hall effect sensor that is resistant to magnetic interference according to this utility model;

[0019] Figure 2 for Figure 1 Another structural diagram of the Hall component shown;

[0020] Figure 3 for Figure 2 A partial exploded view of the Hall component shown;

[0021] Figure 4 A structural diagram of an embodiment of the Hall effect component resistant to magnetic interference of this utility model equipped with a magnetic shaft;

[0022] Figure 5 for Figure 4 The diagram shows a partial exploded view of the Hall effect sensor.

[0023] Figure label:

[0024] Substrate 100, facing portion 110;

[0025] Hall element 200;

[0026] Shielding cover 300;

[0027] Magnetic shaft 400. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In the description of this utility model, the use of terms such as first, second, third, fourth, and fifth is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Reference Figures 1 to 3 This utility model provides a Hall effect component that is resistant to magnetic interference, which includes a substrate 100, a Hall element 200 and a shield 300. The substrate 100 has a facing portion 110, and the Hall element 200 and the shield 300 are both located on the lower side of the facing portion 110. The Hall element 200 is located inside the shield 300.

[0033] Understandably, the substrate 100 is configured as a PCB module of a processing system that can function as a keyboard, and the upper side of the substrate 100 is used to mount the magnetic axis 400, so that the magnet of the magnetic axis 400 is located on the upper side of the corresponding facing part 110.

[0034] With the above structure, after the Hall element of this application is installed on the magnetic axis keyboard, the shield 300 acts as a physical barrier, guiding the magnetic field generated by the magnet of the target magnetic axis 400 (the magnetic axis 400 located on the upper side of the corresponding facing part 110), while blocking and weakening the magnetic field generated by the magnet of the adjacent magnetic axis 400 (whether it is a static magnetic field or a dynamic magnetic field generated by state changes). This ensures that the Hall element 200 mainly senses the magnetic field change of the corresponding magnet directly above it, greatly reducing the possibility of interference from the operation of the adjacent magnetic axis 400 to the current Hall element 200. Therefore, it can greatly reduce or completely eliminate the problem of the current Hall element 200's misidentification and misresponse caused by interference from the adjacent magnetic field.

[0035] It is understood that the Hall effect components of this application can also be installed in other electronic products that utilize Hall effect technology.

[0036] The Hall element 200 is housed within the shielding cover 300. For details, please refer to [reference needed]. Figure 2 and Figure 3 The shield 300 is placed over the Hall element 200.

[0037] In some embodiments, the Hall element 200 is disposed within the shielding cover 300; specifically, the Hall element 200 is encapsulated within the shielding cover 300. It is understood that the Hall element 200 encapsulated within the shielding cover 300 can still sense the corresponding magnet directly above it.

[0038] In this embodiment, refer to Figure 2 and Figure 3 The number of facing parts 110, Hall elements 200 and shielding covers 300 are all set to be multiple. Multiple Hall elements 200 are arranged one-to-one on the lower side of multiple facing parts 110, and multiple shielding covers 300 are arranged one-to-one on the lower side of multiple facing parts 110, and multiple shielding covers 300 cover multiple Hall elements 200.

[0039] It is understandable that "multiple" means at least two.

[0040] It is understandable that the number of the facing part 110, the Hall element 200, and the shield 300 can correspond to the number of magnetic shafts 400 mounted on the substrate 100.

[0041] This utility model also proposes a magnetic axis keyboard, which includes a magnetic axis 400 and the aforementioned Hall effect component that is resistant to magnetic interference. The magnetic axis 400 is located on the upper side of the corresponding facing part 110. The magnetic axis 400 is provided with a magnet that can move up and down, and a shielding component is provided around the periphery of the magnet.

[0042] With the above structure, on the one hand, the shielding component is arranged around the periphery of the magnet, which can restrain its lateral stray magnetic field and further reduce the probability of it inducing the adjacent Hall element 200 to trigger a response; on the other hand, the shielding component can reconstruct the magnetic field path of the magnet, so that its magnetic lines of force are closed along a preset vertical path, and the magnet can be more concentrated in the detection position by the Hall element 200 located directly below.

[0043] In this embodiment, both the shielding cover 300 and the shielding component are made of permalloy.

[0044] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A Hall effect sensor resistant to magnetic interference, characterized in that: The device includes a substrate (100), a Hall element (200), and a shield (300). The substrate (100) has a facing portion (110). The Hall element (200) and the shield (300) are both located on the lower side of the facing portion (110). The Hall element (200) is located inside the shield (300).

2. The Hall effect sensor resistant to magnetic interference according to claim 1, characterized in that: The shield (300) covers the Hall element (200).

3. The Hall effect sensor resistant to magnetic interference according to claim 1, characterized in that: The Hall element (200) is encapsulated within the shield (300).

4. A Hall effect assembly resistant to magnetic interference according to claim 1, characterized in that: The number of the facing portion (110), the Hall element (200), and the shield (300) is set to at least two. At least two Hall elements (200) are respectively disposed on the lower side of at least two facing portions (110), at least two shields (300) are respectively disposed on the lower side of at least two facing portions (110), and at least two Hall elements (200) are respectively disposed inside at least two shields (300).

5. A Hall effect sensor resistant to magnetic interference according to any one of claims 1-4, characterized in that: The shielding cover (300) is made of permalloy.

6. A magnetic axis keyboard, characterized in that: Includes a magnetic shaft (400) and a Hall effect assembly resistant to magnetic interference as claimed in any one of claims 1-5, wherein the magnetic shaft (400) is disposed on the upper side of the opposing portion (110) and the magnetic shaft (400) is provided with a magnet that can move up and down.

7. The magnetic axis keyboard according to claim 6, characterized in that: The magnet is surrounded by a shielding element.

8. The magnetic axis keyboard according to claim 7, characterized in that: The shielding component is made of permalloy.

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