Hall sensing microswitch and Hall keyboard

Abstract

The utility model discloses a Hall sensing microswitch and a Hall keyboard. The Hall sensing microswitch is used for triggering the Hall element to generate a signal, the side wall of the pressing shaft is provided with an extension part, the extension part of the pressing shaft is provided with a first magnetic block, the key seat is provided with a second magnetic block, and the first magnetic block and the second magnetic block attract each other when being adjacent; the central axis of the attracted magnetic poles of the two magnetic blocks is perpendicular to the moving axis of the pressing shaft relative to the key seat when the attraction force is maximum; when the pressing shaft is pressed, the first magnetic block shears the magnetic attraction force relative to the second magnetic block to generate a pressing hand feeling, and meanwhile, the first magnetic block changes the magnetic flux received by the Hall element downwards to generate a signal. When the two adjacent magnetic blocks respectively located on the key seat and the pressing shaft are pressed, interaction between pressing force and shearing magnetic attraction force is ingeniously formed, paragraph hand feeling of pressure sudden change can be fed back to pressing fingers, and unique paragraph hand feeling experience is brought to a user; in addition, the Hall element is ingeniously fused at the bottom of the microswitch, and the Hall element can accurately output electromagnetic signals along with the movement of the magnetic block.

Description

Technical Field

[0001] The utility model relates to the field of micro switches, in particular to a Hall induction micro switch and a Hall keyboard. Background Art

[0002] The Hall switch is an electronic switch based on the Hall effect principle. It has the advantages of high sensitivity, fast response speed, and long life. It is widely used in electronic equipment, automation equipment, industrial control and other fields. The micro switch is small in size and light in weight, and is very suitable for use in limited spaces, such as various electronic devices.

[0003] In practical applications, micro switches using Hall elements still face some technical challenges. The operational flexibility of micro switches requires the Hall elements to respond quickly to changes in force. However, the lightness and miniaturization of micro switches require consideration of space limitations and layout optimization when integrating Hall elements. How to effectively install and fix magnetic parts and Hall elements in a limited space while ensuring their coordinated work with other parts of the micro switch is a technical problem that needs to be solved. Utility Model Content

[0004] In view of the above problems, the utility model aims to provide a Hall induction micro switch and a Hall keyboard.

[0005] To achieve the technical purpose, the solution of the utility model is: a Hall-sensing microswitch, used to trigger a Hall element to generate a signal, including a key base and a push shaft mounted in the key base and capable of moving up and down, the bottom plate of the push shaft having a guide column mounted with an elastic reset member, the side wall of the push shaft having an extension portion, a first magnetic block being provided on the extension portion of the push shaft, a second magnetic block being provided on the key base, the first magnetic block and the second magnetic block attracting each other when adjacent to each other, and at maximum suction force, the center axis of the magnetic poles of the two magnetic blocks being attracted to each other is perpendicular to the moving axis of the push shaft relative to the key base; when the push shaft is pressed, the first magnetic block shears the magnetic attraction relative to the second magnetic block to generate a pressing feel, and at the same time, the first magnetic block changes the magnetic flux received by the Hall element downward to generate a signal.

[0006] Preferably, the extension portion is a U-shaped open structure, a mounting groove for limiting the first magnetic block is provided in the open structure, a limiting protrusion is provided at the end of the open structure, and the first magnetic block passes over the limiting protrusion from the open structure and is installed in the open structure.

[0007] Preferably, the inner wall of the key base is provided with a U-shaped groove for installing the second magnetic block, and the inner wall of the key base is also provided with a limiting protrusion, and the limiting protrusion is located on the top of the second magnetic block.

[0008] Preferably, the first magnetic block and the second magnetic block are cylindrical structures of the same size.

[0009] Preferably, a guide groove is provided in the key base, and the elastic return member is located in the guide groove.

[0010] Preferably, a through hole is provided in the key base, through which the extended portion of the push shaft can pass.

[0011] The present application also provides a Hall keyboard having a plurality of Hall sensing micro switches as described above, and a Hall element is patched on the bottom plate position corresponding to each Hall sensing micro switch.

[0012] The beneficial effects of the utility model are as follows: when the two adjacent magnetic blocks located on the key base and the pressing shaft are pressed, they cleverly form the interaction between the pressing force and the shear magnetic attraction force, which can feed back the sudden change in pressure of the pressing finger to the segment feel, bringing a unique segment feel experience to the user; in addition, the Hall element is cleverly integrated at the bottom of the micro switch, and as the magnetic block moves, the Hall element can accurately output electromagnetic signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is an exploded view of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the pressing shaft in the utility model;

[0016] Figure 4 It is a structural schematic diagram of the key base in the utility model;

[0017] Figure 5 It is a top view of the key base in the utility model.

[0018] In the figure: 1, push shaft; 101, guide column; 102, extension part; 103, mounting groove; 104, limiting protrusion; 2, first magnetic block; 3, reset elastic member; 4, key base; 401, U-shaped groove; 402, limiting protrusion; 403, guide groove; 404, through hole; 5, second magnetic block; 6, Hall element; 7, bottom plate. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In order to clearly and completely describe the technical solution, the following embodiments are selected for illustration; the following embodiments are part of the embodiments of the utility model; based on this application, other embodiments obtained without creative work are all within the scope of protection of the utility model.

[0020] In the following embodiments, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of clearly describing the present embodiment, rather than indicating or implying that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present application. At the same time, "first" and "second" in the embodiments are only used for distinguishing description purposes, and do not represent or imply relative importance.

[0021] like Figure 1-5 As shown, the specific embodiment of the utility model is a Hall induction micro switch, which is used to trigger the Hall element 6 to generate a signal, including a key base 4 and a push shaft 1 that is sleeved in the key base 4 and can move up and down, the bottom plate 7 of the push shaft 1 has a guide column 101 sleeved with an elastic reset member, the side wall of the push shaft 1 has an extension 102, the extension 102 of the push shaft 1 is provided with a first magnetic block 2, and the key base 4 is provided with a second magnetic block 5. The first magnetic block 2 and the second magnetic block 5 attract each other when they are adjacent, and the central axis of the magnetic poles of the two magnetic blocks is perpendicular to the moving axis of the push shaft 1 relative to the key base 4 when the maximum suction force is reached; when the push shaft 1 is pressed, the first magnetic block 2 shears the magnetic attraction force relative to the second magnetic block 5 to generate a pressing feel, and at the same time, the first magnetic block 2 changes the magnetic flux received by the Hall element 6 downward to generate a signal. When the push shaft 1 is pressed, the first magnetic block 2 shears the magnetic attraction force to make the push shaft 1 move relative to the key base 4, and when the push shaft 1 is released, the reset elastic member 3 drives the push shaft 1 to reset to the maximum magnetic attraction force. When the maximum suction force is generated between the two magnetic blocks (i.e. when the adjacent distance between the two magnetic blocks is the shortest), the central axis of the magnetic poles of the two magnetic blocks (i.e. the shortest straight line between the magnetic pole of the first magnetic block 2 and the opposite magnetic pole of the second magnetic block 5) is perpendicular to the moving axis of the push shaft 1 relative to the key seat 4; the effect of this arrangement is that when there is no external force pressing the push shaft 1, the first magnetic block 2 and the second magnetic block 5 are in a state of mutual attraction and maximum suction force (i.e. the adjacent distance between the two magnetic blocks is the shortest), and this state is the normal state of the key switch; when the user presses the key switch, the external force applied to the push shaft 1 shears the magnetic suction force between the first magnetic block 2 and the second magnetic block 5, so that the push shaft 1 is relative to the key seat 4 moves, at this time, the sheared magnetic attraction can be fed back to the paragraph feel of the sudden change of the pressing finger pressure (ordinary people can experience this paragraph rhythm by sliding two attractive magnetic blocks against each other), this is because the shearing magnetic attraction has the effect brought about by the critical mutation, while the conventional pulling magnetic attraction is a linear change of force and cannot provide this kind of feel; when the user releases the pressure on the micro switch, the external force on the pressing shaft 1 is eliminated, and at this time the first magnetic block 2 on the pressing shaft 1 is attracted by the second magnetic block 5 on the key base 4 and sucked back to the position of the maximum magnetic attraction of the two magnetic blocks (that is, the position where the adjacent distance between the two magnetic blocks is the shortest), and the pressing shaft 1 is reset along with the reset elastic member 3.

[0022] The extension portion 102 is a U-shaped open structure, in which a mounting groove 103 for limiting the first magnetic block 2 is constructed. A limiting protrusion 104 is provided at the end of the open structure. The first magnetic block 2 passes over the limiting protrusion 104 from the open structure and is installed in the open structure. The open structure of the extension portion 102 has a certain elasticity, which can force the first magnetic block 2 to open the limiting protrusion 104. After the first magnetic block 2 enters the mounting groove 103, the limiting protrusion 104 quickly returns to its original position, so that the first magnetic block 2 is limited in the annular arc-shaped mounting groove 103. This assembly method is more secure than open-hole assembly or gluing with glue, so that the first magnetic block 2 of the press shaft 1 will not fall off, reducing the probability of failure.

[0023] In order to install the second magnetic block 5, the inner wall of the key base 4 is constructed with a U-shaped groove 401 for installing the second magnetic block 5, providing a stable installation position for the second magnetic block 5, which will not easily shift or shake. A limiting protrusion 402 is also provided on the inner wall of the key base 4. The limiting protrusion 402 is located at the top of the second magnetic block 5, which effectively prevents the magnetic block from moving upward or out of its installation position when subjected to external force.

[0024] Preferably, the first magnetic block 2 and the second magnetic block 5 are cylindrical structures of the same size to ensure the stability of the magnetic force between the first magnetic block 2 and the second magnetic block 5 .

[0025] In order to facilitate the positioning of the push shaft 1 and the key base 4, a guide groove 403 is provided in the key base 4, and the elastic reset member is located in the guide groove 403. In addition, a through hole 404 is provided in the key base 4 to allow the extension portion 102 of the push shaft 1 to pass through.

[0026] The present application also provides a Hall keyboard having a plurality of any one of the above Hall sensing micro switches, and a Hall element 6 is mounted on the corresponding position of the bottom plate 7 of each Hall sensing micro switch.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A Hall-effect inductive microswitch, used to trigger a Hall element to generate a signal, comprising a keybed and a push shaft mounted within the keybed and capable of moving up and down, with a guide post for an elastic reset member provided at the bottom of the push shaft, characterized in that: The side wall of the push shaft has an extension portion, and a first magnetic block is provided on the extension portion of the push shaft, and a second magnetic block is provided on the key base. The first magnetic block and the second magnetic block attract each other when they are adjacent, and when the suction force is maximum, the center axis of the magnetic poles of the two magnetic blocks is perpendicular to the moving axis of the push shaft relative to the key base; when the push shaft is pressed, the first magnetic block shears the magnetic attraction force relative to the second magnetic block to produce a pressing feel, and at the same time, the first magnetic block changes the magnetic flux received by the Hall element downward to generate a signal.

2. The Hall-effect inductive micro switch according to claim 1, characterized in that: The extension portion is a U-shaped open structure, in which a mounting groove for limiting the first magnetic block is provided. A limiting protrusion is provided at the end of the open structure, and the first magnetic block passes over the limiting protrusion from the open structure and is installed in the open structure.

3. The Hall-effect inductive micro switch according to claim 1, characterized in that: The inner wall of the key base is provided with a U-shaped groove for installing the second magnetic block. The inner wall of the key base is also provided with a limiting protrusion, and the limiting protrusion is located on the top of the second magnetic block.

4. The Hall-effect induction micro switch according to claim 1, characterized in that: The first magnetic block and the second magnetic block are cylindrical structures of the same size.

5. The Hall-effect inductive micro switch according to claim 1, characterized in that: A guide groove is provided in the key base, and the elastic reset member is located in the guide groove.

6. The Hall-effect inductive micro switch according to claim 1, characterized in that: A through hole is provided in the key base, through which the extended portion of the push shaft can pass.

7. A Hall effect keyboard, characterized in that: The invention comprises a plurality of Hall-effect sensing micro switches according to any one of claims 1 to 6, wherein a Hall element is mounted on a bottom plate position corresponding to each Hall-effect sensing micro switch.

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