Key having magnetic switch

Abstract

The present application relates to the field of input devices, and discloses a key having a magnetic switch. The key having a magnetic switch comprises a base body, a key body, a magnetic block, and a Hall sensor. The base body is hollow to form a mounting position, and the key body is mounted in the mounting position. The magnetic block is provided in the mounting position opposite to the Hall sensor. Magnetic poles of the magnetic block are arranged in the vertical direction to form a magnetic field distribution in the vertical direction. The magnetic block and the key body move synchronously in the vertical direction. When the magnetic block is at an initial position, a lower magnetic pole of the magnetic block horizontally and oppositely cooperates with the Hall sensor, and when the magnetic block moves to a lower stroke stop point, an upper magnetic pole of the magnetic block horizontally and oppositely cooperates with the Hall sensor. According to the key, the Hall sensor is triggered by means of changes in the magnetic poles, so that changes in the magnetic field can be controlled more accurately, thereby ensuring the accuracy and interference resistance of a trigger signal, and reducing the possibility of false triggering and missed triggering.

Description

Magnetic shaft key TECHNICAL FIELD

[0001] The present application relates to the field of input devices, and particularly relates to a magnetic shaft key. BACKGROUND

[0002] Hall sensors are widely used in various electronic devices and mechanical devices for detecting changes in magnetic fields and converting them into electrical signals, thereby realizing functions such as switching, positioning, and speed detection. In keyboard design, magnetic shaft keys are a typical application. Traditional magnetic shaft keys mainly rely on the change in magnetic field strength of a single magnetic pole to achieve triggering. This design usually installs a magnetic block on the key, and through the pressing of the key, the magnetic block moves, thereby changing the magnetic field strength detected by the Hall sensor, achieving signal triggering.

[0003] Although the traditional magnetic shaft key meets the requirements of triggering to some extent, there are still some deficiencies in actual application. First, the triggering stability is poor. The traditional design relies on the change in magnetic field strength of a single magnetic pole, which is easily disturbed by external environmental magnetic fields, leading to unstable triggering. This instability may cause false triggering or missed triggering in electronic devices, affecting the normal use of the device. Second, the triggering reliability is low. The relative position between the magnetic block and the Hall sensor may shift in the long-term use of the single magnetic pole design magnetic shaft key, leading to inaccurate triggering signals. In this case, frequent calibration and maintenance are required, increasing the use cost and maintenance difficulty.

[0004] Especially in a multi-key keyboard, the existing structure is also easily disturbed by the magnetic field of adjacent keys. This disturbance makes the triggering signals of each key may influence each other, further reducing the overall performance of the keyboard and user experience.

[0005] In summary, the traditional magnetic shaft key has deficiencies in triggering stability, reliability, and anti-interference ability, and needs to be further improved to improve its performance in actual application. CONTENT OF THE INVENTION

[0006] The purpose of the present application is to at least overcome one deficiency of the prior art, and provide a magnetic shaft key which triggers a Hall sensor through magnetic pole change, can more accurately control the change of the magnetic field, ensure the accuracy and anti-interference of the triggering signal, and reduce the possibility of false triggering and missed triggering.

[0007] 3. To achieve the above object, the application discloses a magnetic shaft key, comprising a base, a key body, a magnetic block and a Hall sensor, wherein the base is hollow to form a mounting position, the key body is mounted in the mounting position and cooperates with the base through an elastic reset element and a guide structure to realize the reset linear motion of the key body relative to the base; the magnetic block is opposite to the Hall sensor and is arranged in the mounting position; the magnetic poles of the magnetic block are arranged in the vertical direction to form a vertical magnetic field distribution; the magnetic block and the key body move synchronously in the vertical direction; when the magnetic block is at the initial position, the lower magnetic pole cooperates with the Hall sensor horizontally, and when the magnetic block moves to the lower stroke stop point, the upper magnetic pole cooperates with the Hall sensor horizontally.

[0008] In some embodiments, the Hall sensor has a pin extending out of the base.

[0009] In some embodiments, the base is made of a non-magnetic material and comprises a seat and a cover.

[0010] In some embodiments, the key body is made of a non-magnetic material and comprises a handle part, a guide column extending downward from the handle part, and a mounting block extending from the handle part, the mounting block being used to mount the magnetic block, and the base being provided with a guide groove matched with the guide column, the guide column and the guide groove being matched to realize the axial guidance and limiting of the key body.

[0011] Further, the key body further comprises a square guide block, and the base is provided with a square guide groove matched with the square guide block, the square guide groove and the square guide block being matched to realize the axial guidance and radial limiting of the key body.

[0012] In some embodiments, the elastic reset element is a spring.

[0013] In some embodiments, the magnetic block is a regular rectangle, and the magnetic poles of the magnetic block are arranged in the up-down direction, the top end being a north pole and the bottom end being a south pole.

[0014] Compared with the prior art, the application has at least one of the following beneficial effects:

[0015] 1. Improve the accuracy of the trigger signal: the Hall sensor is triggered by the change of the magnetic pole, and the magnetic shaft key can more accurately control the change of the magnetic field to ensure the accuracy of the trigger signal.

[0016] 2. Enhance the anti-interference ability: the design of the magnetic shaft key reduces the interference of the external magnetic field on the Hall sensor, improves the anti-interference ability of the key, and is especially suitable for use in a multi-key keyboard to reduce the interference of the magnetic field of the adjacent key.

[0017] 3. Reduce false triggering and missing triggering: due to the up and down magnetic pole arrangement, the button has different magnetic poles relative to the Hall sensor at the initial position and the lower stroke stop point, which significantly reduces the possibility of false triggering and missing triggering, and improves the reliability of the button.

[0018] The above-listed benefits are not exhaustive of all advantages. Other potential benefits and detailed technical implementations will be further disclosed in the embodiments or other description sections of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] Aspects of the present disclosure will become more fully understood from the detailed description and embodiments provided hereinafter and the accompanying drawings. The position, size, range, and the like of each structure shown in the drawings are sometimes exaggerated to make the drawing easier to understand.

[0020] Fig. 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0021] Fig. 2 is a schematic diagram of the structure after removing the base of an embodiment of the present application.

[0022] Fig. 3 is a schematic diagram of the structure after removing the base from another perspective of an embodiment of the present application.

[0023] Fig. 4 is a schematic diagram of the cross-sectional structure of an embodiment of the present application, in which the button is at the initial position.

[0024] Fig. 5 is a schematic diagram of the cross-sectional structure of an embodiment of the present application, in which the button body is at the lower stroke stop point. DETAILED DESCRIPTION

[0025] The present disclosure will be described with reference to the accompanying drawings, which show several embodiments of the present disclosure. It should be understood, however, that the present disclosure can be presented in many different forms and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully inform those skilled in the art of the scope of protection of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0026] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, the size of some features can be distorted for the sake of clarity.

[0027] It is to be understood that the phraseology or terminology herein is for description and not of limitation. The terms and expressions employed herein have their ordinary technical meanings unless otherwise defined. There is no intention that the use of ordinary terms or terminology will be construed to exclude any equivalents of terms or terminology so long as the technical operation accomplished is the same.

[0028] The singular forms "a," "said," and "the" used in the specification are intended to include plural forms as well, unless the context clearly indicates otherwise. The terms "includes," "including," and "has," as used in the specification, indicate the presence of the stated feature but do not preclude the presence or addition of one or more other features. The term "and / or" as used in the specification encompasses any and all combinations of one or more of the associated listed items. Embodiments

[0029] As shown in FIGS. 1-5, the present embodiments disclose a magnetic shaft key, comprising a base 1, a key body 2, a magnetic block 3, and a Hall sensor 4.

[0030] The base 1 is hollowed to form a mounting site 101, and the key body 2 is mounted in the mounting site 101 and cooperates with the base through an elastic return element 102 and a guide structure to achieve linear movement of the key body 2 relative to the base 1.

[0031] It is noted that the base 1 is made of a non-magnetic material, such as ABS plastic or polyamide (nylon), which has good mechanical strength and durability. The base 1 includes a seat 103 and a cover 104, and the hollow design of the base 1 forms the mounting site 101, allowing the key body 2 to move freely therein without external interference.

[0032] The seat 103 of the base 1 is a hollow rectangular frame with a guide groove inside to cooperate with a guide post 201 at the lower end of the key body 2. The cover 104 is a cap-shaped structure mounted above the seat 103 and fixed by a buckle or screw.

[0033] The bottom of the base 1 is provided with a spring mounting site for mounting the elastic return element 102. In general, the elastic return element 102 is a return spring with a spiral structure to ensure that the key body 2 can quickly return after being released.

[0034] More specifically, the return spring is usually made of stainless steel or other high-elasticity metal materials. The selection of the spring needs to consider its elastic coefficient and fatigue life to ensure that the key can maintain good return performance during long-term use. The spring is installed between the lower end of the guide post of the key body 2 and the spring mounting site at the bottom of the base.

[0035] In the implementation, when the key body 2 is pressed, the spring is compressed to store energy; when the key body 2 is released, the spring restores its original shape to push the key body 2 back to the initial position to achieve fast reset.

[0036] In the embodiment, the key body 2 is made of non-magnetic material, such as ABS plastic or polycarbonate (PC), which has good mechanical strength and durability.

[0037] The key body 2 includes a handle 202, a guide column 201 extending downward from the handle 202, and a mounting block 203 extending from the handle 202. The handle 202 is not the part pressed by the user, and is usually matched with an external key cap (not shown in the figure). The key cap is usually designed to be ergonomic to provide a comfortable operation experience.

[0038] In the specific structure, the guide column 201 is located below the handle 202 and extends vertically downward from the center of the handle 202. The lower end of the handle 202 is connected with the mounting block 203, and the mounting block 203 is used to fix the magnetic block 3.

[0039] In operation, the key body 2 is matched with a guide groove in the base body 1 through the guide column 201. The guide groove is arranged axially along the base body 1 to ensure that the key body 2 moves smoothly in the vertical direction without deviation, thereby ensuring the accuracy and stability of triggering.

[0040] To further improve the stability of movement, the key body 2 further includes a square guide block 204. A matching square guide groove is arranged on the base body 1 to cooperate with the guide block 204. This design further enhances the stability of the key body and prevents shaking or jamming during use.

[0041] As a further description of the embodiment, the magnetic block 3 is fixed on the mounting block 203 of the key body 2 and has a regular rectangular shape. The magnetic poles are arranged in the up-down direction, with the top end being the north pole and the bottom end being the south pole. The magnetic block 3 is usually made of neodymium iron boron (NdFeB) material, which has strong magnetic properties and stable magnetic field characteristics.

[0042] To realize the installation of the magnetic block 3, the bottom of the mounting block 203 is upwardly recessed to form a slot, and the magnetic block 3 is clamped in the slot to ensure that the magnetic block 3 moves synchronously with the key body 2. Through this arrangement of up-down magnetic poles, the magnetic block 3 forms a uniform magnetic field distribution in the vertical direction in the linear stroke of the key body 2, ensuring that the Hall sensor 4 can accurately detect the change of the magnetic field.

[0043] In the embodiment, the Hall sensor 4 is also installed in the mounting position 101 of the base body 1 and is arranged opposite to the magnetic block 3.

[0044] The Hall sensor 4 is connected to the external PCB circuit board 5 through its pins, so that the detected magnetic field change signal can be transmitted to the control circuit to realize the trigger output of the key signal.

[0045] It should be noted that the PCB circuit board 5 is provided with a clearance position for avoiding the key body 2 and the magnetic block 3.

[0046] In this embodiment, the detection surface of the Hall sensor 3 is vertically oriented towards the movement direction of the magnetic block 3, ensuring that the change of the magnetic field during the up-down movement of the magnetic block 3 can be accurately captured. The position of the Hall sensor 4 is fixed at a specific position in the base body 1, fixed by a bracket or a fixing groove, ensuring that there will be no position deviation during long-term use.

[0047] In the specific implementation process, when the key body 2 is pressed down, the magnetic block 3 moves downward together with the key body 2, and the upper magnetic pole of the magnetic block 3 gradually approaches the Hall sensor 4, and finally is flush with the Hall sensor 4 in the horizontal direction at the lower stroke stop point. At this time, the Hall sensor 4 detects the change of the magnetic field from one pole to another and generates a signal. After the key is released, the key body 2 is reset by the action of the reset spring, and the magnetic block 3 rises and returns to the initial position, at which time the lower magnetic pole is flush with the Hall sensor 4, and the Hall sensor 4 re-detects the initial magnetic field state. Through the change of the upper and lower magnetic poles, the Hall sensor 4 can accurately detect each pressing action of the key, ensuring the accuracy and stability of the signal.

[0048] Compared with the traditional magnetic shaft key, the magnetic shaft key of the present embodiment has significant technical advantages in many aspects. The traditional magnetic shaft key mainly relies on the change of the magnetic field strength of a single magnetic pole to realize triggering, which is easy to be disturbed by external magnetic fields. For example, external electromagnetic equipment or changes in the surrounding magnetic field can affect the detection of the Hall sensor, causing unstable triggering and false triggering. Such interference may come from adjacent keys, nearby electronic devices or other magnetic objects, causing the Hall sensor to be unable to accurately determine the key state.

[0049] The present embodiment triggers the Hall sensor 4 through the change of the magnetic pole, which can more accurately control the change of the magnetic field, ensuring that the Hall sensor 4 is not affected by the change of the external magnetic field strength when detecting the position of the magnetic pole, thereby improving the accuracy and stability of the trigger signal. At the same time, this design significantly enhances the anti-interference ability and reduces the possibility of false triggering and missed triggering.

[0050] Although exemplary embodiments of the present disclosure have been described, those skilled in the art should understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and the equivalents of these claims are also included.

Claims

1. A magnetic shaft key, characterized in that, The application relates to a key body and a base, and belongs to the technical field of key bodies. The base is hollow to form a mounting position, the key body is mounted in the mounting position, a magnetic block is arranged in the mounting position opposite to a Hall sensor, the magnetic poles of the magnetic block are arranged in a vertical direction to form a magnetic field distribution in the vertical direction, the magnetic block and the key body move synchronously in the vertical direction, a lower magnetic pole of the magnetic block is horizontally matched with the Hall sensor when the magnetic block is in an initial position, and an upper magnetic pole of the magnetic block is horizontally matched with the Hall sensor when the magnetic block moves to a lower stroke end point.

2. A magnetic axle key as claimed in claim 1, characterized in that: The key body is matched with the base through an elastic reset element and a guide structure to realize the linear movement of the key body relative to the base.

3. A magnetic axle key as claimed in claim 1, wherein: The Hall sensor has a pin extending out of the base.

4. A magnetic axle key as claimed in claim 1, wherein: The base is made of a non-magnetic material and comprises a seat and a cover.

5. A magnetic axle key as claimed in claim 1, characterized in that: The key body is made of a non-magnetic material and comprises a handle part, a guide column extending downward from the handle part, and a mounting block extending from the handle part, the mounting block being used for mounting the magnetic block, a guide groove matched with the guide column is arranged on the base, and the guide column and the guide groove are matched to realize the axial guide and position limitation of the key body.

6. A magnetic axle key as defined in claim 1, wherein: The key body further comprises a square guide block, and a square guide groove matched with the guide block is arranged on the base, the square guide groove and the square guide block are matched to realize the axial guide and radial position limitation of the key body.

7. A magnetic axle key as defined in claim 1, wherein: The elastic reset element is a spring.

8. A magnetic axle key as defined in claim 1, wherein: The magnetic block is a regular rectangle, the magnetic poles of the magnetic block are arranged in a vertical direction, the top end is a north pole, and the bottom end is a south pole.

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