Hall sensing type keyboard key

Abstract

The utility model relates to the technical field of keyboard keys, in particular to a Hall sensing type keyboard key, which comprises a shell, a shaft core and a PCB (printed circuit board), an inner mounting cavity for placing the shaft core is arranged in the shell, the shaft core can be positioned in the inner mounting cavity through a reset piece to move up and down, a magnetic block is arranged at the bottom end of the shaft core, a Hall sensor is arranged in the PCB, and the Hall sensor is positioned in the inner mounting cavity. The Hall sensor is arranged on the end face, away from the shell, of the PCB, a pressing through hole is formed in the bottom end face of the shell, and the magnetic block can penetrate through the pressing through hole to extend to abut against the end face, away from the Hall sensor, of the PCB, so that the magnetic block and the Hall sensor can be isolated through the PCB with the fixed thickness specification. The height distance of the triggering magnetic induction intensity is determined by the PCB with the fixed thickness specification, a fixed triggering height is formed, meanwhile, the magnetic block and the switch type Hall sensor form an isolated structure, and damage caused by the fact that the shaft core touches the switch type Hall sensor is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of keyboard keys, in particular to a Hall sensor type keyboard key. Background Art

[0002] Hall sensor keyboard keys are a type of keys without physical contact points. Since there are no physical contact points, they can be tapped. The principle is: based on the Hall effect, people use semiconductor materials to make components called Hall elements. It has the advantages of being sensitive to magnetic fields, simple structure, small size, wide frequency response, large output voltage variation and long service life. Therefore, compared with traditional mechanical keyboards, it has less wear and tear and longer service life. It is more stable, fast and sensitive.

[0003] Hall sensors are roughly divided into two types: linear Hall sensors and switch Hall sensors. The Hall sensors in existing Hall sensor keyboard keys are generally switch Hall sensors, where the key trigger factor of the switch Hall sensor is the magnetic induction intensity, and the magnetic induction intensity is directly proportional to the height of the magnetic block controlled by the axis of the keyboard key. When the height of the magnetic block is at a certain height, the magnetic induction intensity of the switch Hall sensor is met, and the corresponding trigger level can be output to the PCB circuit board.

[0004] In the prior art, the switch type Hall sensor is generally welded on the keyboard PCB circuit board, and a fixing plate 8 with a key slot needs to be arranged between the PCB circuit board and the keyboard keys. Figure 1 As shown in , the keyboard keys are mounted on the fixing plate 8 to form an air-avoiding structure with the switch-type Hall sensor, thereby preventing the shaft core from touching the switch-type Hall sensor and causing damage;

[0005] However, the thickness of the fixed plate 8 of different manufacturers cannot be kept consistent, resulting in the travel height of the magnetic block being affected by the thickness of the fixed plate 8, and the height travel required to be pressed between the magnetic block and the switch-type Hall sensor cannot be consistent. When the thickness of the fixed plate 8 is large, the corresponding magnetic induction intensity cannot be achieved, affecting the user experience of the keyboard. Therefore, in view of these current situations, there is an urgent need to develop a Hall sensor keyboard key to meet the needs of actual use. Summary of the invention

[0006] The utility model aims to solve the above defects and provide a Hall sensor keyboard key.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A Hall sensor keyboard key structure comprises a shell, a shaft core and a PCB circuit board. The interior of the shell is an installation inner cavity for placing the shaft core. The shaft core can be located in the installation inner cavity through a reset piece to move up and down. A magnetic block is provided at the bottom end of the shaft core. A Hall sensor matching the magnetic block is provided in the PCB circuit board. The magnetic block can be moved toward the side of the Hall sensor through the shaft core. The Hall sensor is arranged on an end face of the PCB circuit board away from the shell. A plurality of downwardly protruding installation columns are provided at the bottom of the shell. A plurality of installation holes matching the installation columns are provided in the middle of the PCB circuit board. The shell is plugged and fixed with the installation columns, and a pressing through hole is provided on the bottom end face of the shell. The pressing through hole is located above the Hall sensor. The magnetic block can extend through the pressing through hole and contact with an end face of the PCB circuit board away from the Hall sensor.

[0009] In the above description, as a further solution, the shell is composed of an upper cover and a base, the upper cover is detachably covered on the top of the base, a press-through hole is opened in the bottom center of the base, and a plurality of mounting columns are symmetrically distributed on the bottom end surface of the base.

[0010] In the above description, as a further solution, the bottom end of the mounting column is a frusto-conical snap joint, and the end with a smaller radius of the snap joint is arranged at the bottom end of the mounting column. When the mounting column is plugged into the mounting hole, the end with a larger radius of the snap joint contacts the end face of the PCB circuit board close to the Hall sensor, and an extrusion notch is provided in the middle of the mounting column, and the extrusion notch passes through the middle of the mounting column in a vertical direction.

[0011] In the above description, as a further solution, a pressing column protruding upward is provided in the center of the base, the pressing column is a columnar hollow structure, the pressing column is arranged above the pressing through hole, and the center of the pressing column and the pressing through hole are a conductive structure, one end of the shaft core close to the magnetic block is an extension column, the magnetic block is arranged at the bottom of the extension column, and the extension column is plugged into the inside of the pressing column, and the extension column can be located inside the press column and move up and down.

[0012] In the above description, as a further solution, the reset member is composed of a reset spring, one end of the reset spring is sleeved on the surface of the pressing column, and the other end of the reset spring is sleeved on the surface of the extension column.

[0013] In the above description, as a further solution, a plurality of guide columns protruding upward are provided inside the base, the guide columns are distributed around the pressing through hole, and the side walls of the shaft core are movably connected to the guide columns.

[0014] In the above description, as a further solution, a sliding groove is opened on the side wall of the guide column near the pressing through hole, the sliding groove is opened along the vertical direction, and the side wall of the shaft core is provided with a slider matching the sliding groove, the guide column is embedded in the sliding groove of the guide column through the slider, and the guide column can slide along the track of the sliding groove through the slider.

[0015] In the above description, as a further solution, a clearance hole is opened on the top of the upper cover, and the top of the shaft core is a cross rib protruding upward. The cross rib of the shaft core can pass through the clearance hole and be plugged into the center of the upper cover, and the cross rib of the shaft core can pass through the clearance hole and extend to the top of the upper cover.

[0016] In the above description, as a further solution, the bottom of the upper cover is provided with a plurality of buckle strips extending downward, the side walls of the base are provided with buckle grooves matching the buckle strips, and the upper cover is fixedly connected to the buckle grooves by plugging the buckle strips.

[0017] In the above description, as a further solution, a light guide groove is opened on one side of the base in the vertical direction, a light guide plug is provided inside the light guide groove, and the top surface of the light guide plug is a mapping slope inclined outward.

[0018] The beneficial effects produced by the utility model are as follows:

[0019] A Hall sensor keyboard key of the present application has a Hall sensor arranged on an end face of a PCB circuit board away from a shell, and a pressing through hole is opened on the bottom end face of the shell of the key. The magnetic block can extend through the pressing through hole through the shaft core to contact with the end face of the PCB circuit board away from the Hall sensor, so that the magnetic block and the Hall sensor can be isolated by the PCB circuit board with a fixed thickness specification. The height distance of the triggerable magnetic induction intensity is determined by the PCB circuit board with a fixed thickness specification to form a fixed trigger height. At the same time, the magnetic block and the switch-type Hall sensor form an isolation structure to prevent the shaft core from touching the switch-type Hall sensor and causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of a Hall sensor keyboard key in the prior art;

[0021] Figure 2 This is a schematic diagram of the exploded structure of a Hall sensor keyboard key according to the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of a Hall sensor keyboard key according to the present invention at the bottom angle of the base;

[0023] Figure 4 This is a schematic diagram of the structure of a Hall sensor keyboard key according to the present invention at the top angle of the base;

[0024] Figure 5 This is a schematic diagram of the structure of the central axis core of a Hall sensor keyboard key described in the utility model;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of a Hall sensor keyboard key described in the utility model;

[0026] In the figure: 1-upper cover, 11-buckle strip, 12-avoidance hole, 2-base, 21-buckle groove, 22-pressing column, 221-pressing through hole, 23-light guide groove, 24-guide column, 241-slide groove, 25-mounting column, 25-buckle joint, 251-extrusion notch, 26-mounting inner cavity, 3-axis core, 31-extension column, 32-cross rib, 33-slider, 4-magnetic block, 5-light guide plug, 51-mapping slope, 6-reset spring, 7-PCB circuit board, 71-Hall sensor, 72-mounting hole, 8-fixing plate 8. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0028] See also Figure 1-4 A Hall sensor keyboard key structure specifically implemented therein includes a shell, a shaft core 3 and a PCB circuit board 7. The interior of the shell is an installation cavity 26 for placing the shaft core 3. The shaft core 3 can be located in the installation cavity 26 through a reset member to move up and down. A magnetic block 4 is provided at the bottom end of the shaft core 3. A Hall sensor 71 matching the magnetic block 4 is provided in the PCB circuit board 7. The magnetic block 4 can be moved toward the side of the Hall sensor 71 through the shaft core 3. A light guide groove 23 is provided on one side of the base 2 in the vertical direction. A light guide plug 5 is provided inside the light guide groove 23. The top surface of the light guide plug 5 is a mapping slope 51 inclined outward.

[0029] The Hall sensor 71 is arranged on an end face of the PCB circuit board 7 away from the shell, and a plurality of downwardly protruding mounting posts 25 are provided at the bottom of the shell. A plurality of mounting holes 72 matching the mounting posts 25 are provided in the middle of the PCB circuit board 7. The shell is plugged and fixed with the mounting holes 72 through the mounting posts 25, and a pressing through hole 221 is provided on the bottom end face of the shell. The pressing through hole 221 is located above the Hall sensor 71, and the magnetic block 4 can extend through the pressing through hole 221 to contact with an end face of the PCB circuit board 7 away from the Hall sensor 71.

[0030] The Hall sensor 71 is arranged on an end face of the PCB circuit board 7 away from the shell, and a pressing through hole 221 is opened on the bottom end face of the shell of the button. The magnetic block 4 can extend through the pressing through hole 221 through the shaft core 3 to contact the end face of the PCB circuit board 7 away from the Hall sensor 71, so that the magnetic block 4 and the Hall sensor 71 can be isolated by the PCB circuit board 7 with a fixed thickness specification. The height distance of the triggerable magnetic induction intensity is determined by the PCB circuit board 7 with a fixed thickness specification to form a fixed trigger height. At the same time, the magnetic block 4 and the switch type Hall sensor 71 form an isolation structure to prevent the shaft core 3 from touching the switch type Hall sensor 71 and causing damage.

[0031] Specifically, Figure 2 As shown, the shell body is composed of an upper cover 1 and a base 2. The bottom of the upper cover 1 is provided with a plurality of buckle strips 11 extending downward, and the side walls of the base 2 are provided with buckle grooves 21 matching the buckle strips 11. The upper cover 1 is plugged and fixedly connected with the buckle grooves 21 through the buckle strips 11. The upper cover 1 is covered on the top of the base 2 through the buckle strips 11 and the buckle grooves 21. An air avoidance hole 12 is opened on the top of the upper cover 1, and the top of the shaft core 3 is a cross rib 32 protruding upward. The cross rib 32 of the shaft core 3 can pass through the air avoidance hole 12 to be plugged with the center of the upper cover 1, and the cross rib 32 of the shaft core 3 can pass through the air avoidance hole 12 and extend to the top of the upper cover 1.

[0032] Specifically, Figure 2 , 3 As shown in FIG. 6 , a plurality of mounting posts 25 are symmetrically distributed on the bottom surface of the base 2, wherein the bottom end of the mounting post 25 is a frustum-shaped buckle joint 25, and the end of the buckle joint 25 with a smaller radius is arranged at the bottom end of the mounting post 25. When the mounting post 25 is plugged into the mounting hole 72, the end of the buckle joint 25 with a larger radius contacts the end surface of the PCB circuit board 7 close to the Hall sensor 71, and an extrusion notch 251 is provided in the middle of the mounting post 25, and the extrusion notch 251 passes through the middle of the mounting post 25 in the vertical direction. When the base 2 is connected to the PCB circuit board 7, when the buckle joint 25 is plugged into the mounting hole 72, the buckle joint 25 can be retracted and passed through the extrusion notch 251, and the end of the buckle joint 25 with a larger radius contacts the end surface of the PCB circuit board 7 close to the Hall sensor 71, forming a stable limiting connection structure.

[0033] Specifically, Figure 4 , 5As shown in Figure 6, the pressing hole 221 is opened at the bottom center of the base 2, and the center of the base 2 is provided with a pressing column 22 protruding upward. The pressing column 22 is a columnar hollow structure. The pressing column 22 is arranged above the pressing hole 221, and the center of the pressing column 22 and the pressing hole 221 are a conductive structure. One end of the shaft core 3 close to the magnetic block 4 is an extension column 31. The magnetic block 4 is arranged at the bottom of the extension column 31, and the extension column 31 is plugged into the inside of the pressing column 22. The extension column 31 can be located inside the pressing column 22 and move up and down.

[0034] Specifically, Figure 2 and 6 As shown, the reset member is composed of a reset spring 6, one end of which is sleeved on the surface of the pressing column 22, and the other end of which is sleeved on the surface of the extension column 31. With the two ends of the reset spring 6 sleeved on the surfaces of the pressing column 22 and the extension column 31, when the shaft core 3 is pressed and released, the shaft core 3 can be pushed upward and reset by the elastic stress of the reset spring 6, so that the magnetic block 4 at the bottom of the extension column 31 maintains a distance greater than the trigger height from the Hall sensor 71.

[0035] The interior of the base 2 is provided with a plurality of upwardly protruding guide columns 24, and the guide columns 24 are distributed around the pressing through hole 221. The side wall of the guide column 24 close to the pressing through hole 221 is provided with a slide groove 241, and the slide groove 241 is opened along the vertical direction, and the side wall of the shaft core 3 is provided with a slider 33 matching the slide groove 241, and the guide column 24 is inlaid with the slide groove 241 of the guide column 24 through the slider 33, and the guide column 24 can slide along the track of the slide groove 241 through the slider 33.

[0036] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A Hall sensor keyboard key, comprising a housing, a shaft core and a PCB circuit board, wherein the interior of the housing is an installation cavity for placing the shaft core, the shaft core can be located in the installation cavity through a reset member to move up and down, a magnetic block is provided at the bottom end of the shaft core, a Hall sensor matching the magnetic block is provided in the PCB circuit board, and the magnetic block can be moved toward one side of the Hall sensor through the shaft core, characterized in that: The Hall sensor is arranged on an end face of the PCB circuit board away from the shell, a plurality of downwardly protruding mounting posts are arranged at the bottom of the shell, a plurality of mounting holes matching the mounting posts are opened in the middle of the PCB circuit board, the shell is plugged and fixed with the mounting posts and the mounting holes, and a pressing through hole is opened on the bottom end face of the shell, the pressing through hole is located above the Hall sensor, and the magnetic block can extend through the pressing through hole and contact with the end face of the PCB circuit board away from the Hall sensor.

2. A Hall sensor keyboard key according to claim 1, characterized in that: The shell is composed of an upper cover and a base. The upper cover is detachably covered on the top of the base. A pressing through hole is opened at the bottom center of the base. A plurality of mounting columns are symmetrically distributed on the bottom end surface of the base.

3. A Hall sensor keyboard key according to claim 2, characterized in that: The bottom end of the mounting column is a frusto-conical snap joint, and the end with a smaller radius of the snap joint is arranged at the bottom end of the mounting column. When the mounting column is plugged into the mounting hole, the end with a larger radius of the snap joint contacts the end surface of the PCB circuit board close to the Hall sensor. An extrusion notch is provided in the middle of the mounting column, and the extrusion notch passes through the middle of the mounting column in a vertical direction.

4. A Hall sensor keyboard key according to claim 2, characterized in that: A pressing column protruding upward is provided at the center of the base. The pressing column is a columnar hollow structure. The pressing column is arranged above the pressing through hole, and the center of the pressing column and the pressing through hole are conductive structures. One end of the shaft core close to the magnetic block is an extension column. The magnetic block is arranged at the bottom of the extension column, and the extension column is plugged into the inside of the pressing column. The extension column can be located inside the pressing column and move up and down.

5. A Hall sensor keyboard key according to claim 4, characterized in that: The reset element is composed of a reset spring, one end of which is sleeved on the surface of the pressing column, and the other end of which is sleeved on the surface of the extending column.

6. A Hall sensor keyboard key according to claim 2, characterized in that: A plurality of upwardly protruding guide columns are arranged inside the base, the guide columns are distributed around the pressing through hole, and the side walls of the shaft core are movably connected to the guide columns.

7. A Hall sensor keyboard key according to claim 6, characterized in that: The side wall of the guide column near the pressing through hole is provided with a sliding groove, the sliding groove is opened in the vertical direction, and the side wall of the shaft core is provided with a sliding block matching the sliding groove, the guide column is embedded in the sliding groove of the guide column through the sliding block, and the guide column can slide along the track of the sliding groove through the sliding block.

8. The Hall sensor keyboard key according to claim 2, characterized in that: The top of the upper cover is provided with an air avoidance hole, the top of the shaft core is a cross rib protruding upward, the cross rib of the shaft core can pass through the air avoidance hole and be plugged into the center of the upper cover, and the cross rib of the shaft core can pass through the air avoidance hole and extend to the top of the upper cover.

9. A Hall sensor keyboard key according to any one of claims 2 to 8, characterized in that: The bottom of the upper cover is provided with a plurality of buckle strips extending downward, the side walls of the base are provided with buckle grooves matching the buckle strips, and the upper cover is fixedly connected with the buckle grooves by plugging the buckle strips.

10. A Hall sensor keyboard key according to any one of claims 2 to 8, characterized in that: A light guide groove is provided on one side of the base in the vertical direction, a light guide plug is provided inside the light guide groove, and a top end surface of the light guide plug is a mapping inclined surface inclined outward.

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