Magnetic induction shaft structure and keyboard

Abstract

The utility model discloses a magnetic induction shaft structure and a keyboard. The magnetic induction shaft structure comprises a PCB (Printed Circuit Board), wherein a Hall switch sensor is arranged on the PCB; the key shaft is connected to the PCB and comprises a seat body, a shaft core, an elastic piece and a magnetic piece, and the seat body is provided with a sliding cavity, an opening and a penetrating opening which are communicated with one another; the shaft core is slidably installed in the sliding cavity and penetrates through the opening, the shaft core comprises an outer body and an inner guide column arranged in the outer body, and the lower end face of the inner guide column does not protrude out of the lower end face of the outer body; the elastic piece is arranged outside the inner guide column in a sleeving mode and abuts against the bottom wall of the sliding cavity so that elastic force can be applied to the outer body. The magnetic piece is installed on the outer body, arranged on the side of the elastic piece, arranged corresponding to the penetrating opening and used for triggering the Hall switch sensor under driving of the shaft core. The magnetic induction shaft structure can have a lower height, and when the magnetic induction shaft structure is applied to a keyboard, the keyboard can be miniaturized in the height direction.

Description

Technical Field

[0001] This utility model relates to the field of keyboard technology, and in particular to a magnetic induction shaft structure and keyboard. Background Technology

[0002] Magnetic axis keyboards are favored by users for their fast response speed and stable input quality. The magnetic axis structure of a magnetic axis keyboard includes a circuit board and magnetic axis keys mounted on the circuit board. The circuit board is equipped with a magnetic sensor, and each magnetic axis key has a magnet. When the key is not pressed, the magnet and the magnetic sensor maintain a certain distance. When the key is pressed, the magnet moves closer to the magnetic sensor as the key is pressed down. The magnetic sensor is affected by the change in magnetic field and generates a corresponding sensing output.

[0003] However, in existing magnetic axis keyboards, the magnet and spring are mounted on the same mounting post on the axis core, such as the magnetic component mounting method disclosed in Chinese Utility Model Patent No. CN220914083U. This results in the mounting post on the axis core requiring a longer installation length, affecting the overall height of the magnetic axis and hindering the miniaturization of the keyboard. Utility Model Content

[0004] To address at least one problem existing in the prior art, according to one aspect of the present invention, a magnetic induction shaft structure is provided, comprising:

[0005] PCB board, wherein a Hall switch sensor is provided on the PCB board;

[0006] A key shaft, connected to the PCB board, includes a base, a shaft core, an elastic element, and a magnetic element, wherein:

[0007] The seat body is provided with interconnected sliding cavities, openings, and through holes;

[0008] The shaft is slidably mounted in the sliding cavity and passes through the opening. The shaft includes an outer body and an inner guide post disposed in the outer body. The lower end face of the inner guide post does not protrude from the lower end face of the outer body.

[0009] The elastic element is sleeved outside the inner guide post and abuts against the bottom wall of the sliding cavity so as to apply an elastic force to the outer body;

[0010] The magnetic component is mounted on the outer body and located on the side of the elastic component, corresponding to the through-hole, and is used to trigger the Hall switch sensor under the drive of the shaft.

[0011] In some embodiments, a lower mounting post is provided on the bottom wall of the sliding cavity, and the other end of the elastic element is sleeved on the lower mounting post. The inner guide post includes a first section and a second section from top to bottom. The outer diameter of the second section is smaller than the outer diameter of the first section and smaller than the inner diameter of the lower mounting post.

[0012] In some embodiments, the outer diameter of the second segment and the inner diameter of the lower mounting post gradually decrease from top to bottom.

[0013] In some embodiments, when the elastic element is in its natural state, the height H1 of the key shaft ranges from 6.0 to 6.6 mm.

[0014] In some embodiments, the downward pressing stroke of the shaft core ranges from 2.0 to 2.2 mm, and the height H2 of the seat body ranges from 4.0 to 4.5 mm.

[0015] In some embodiments, the base is provided with a first guide structure, and the outer body is provided with a second guide structure, wherein the first guide structure and the second guide structure are slidably engaged.

[0016] In some embodiments, the base includes a detachably connected base and a top cover, the base having a hook and the top cover having a slot, the hook being engaged with the wall of the slot.

[0017] In some embodiments, the magnetic induction shaft structure further includes a positioning plate, which is disposed above the PCB board. The positioning plate has a positioning hole, the key shaft is disposed in the positioning hole, and the positioning plate has a positioning block, which is inserted into the slot.

[0018] Another aspect of this utility model provides a keyboard, comprising:

[0019] case;

[0020] The magnetic induction shaft structure described above is installed inside the housing and exposed relative to the housing.

[0021] In summary, the magnetic induction shaft structure and keyboard provided by this utility model have the following technical effects:

[0022] By setting the shaft core for mounting the elastic element as an inner guide post comprising an outer body and an inner guide post, with the lower end face of the inner guide post not protruding from the outer body, and the magnetic element located on one side of the elastic element, the inner guide post does not need to form a mounting position for the elastic element. This allows the entire shaft core to have a smaller height, and when the shaft core is pressed down by pressure, the entire shaft core can move downwards sufficiently. The magnetic element can pass through the through-hole to sense the Hall effect switch sensor, avoiding the downward pressing stroke being affected by the magnetic element compared to mounting the magnetic element inside the inner guide post. Therefore, in this embodiment, by setting the inner guide post not to protrude from the outer body and the magnetic element located on one side of the elastic element, the entire magnetic induction shaft structure can have a lower height, enabling the keyboard to be miniaturized in the height direction when applied to a keyboard. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the magnetic induction shaft structure according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 An exploded view of the magnetic induction shaft structure in the diagram;

[0025] Figure 3 for Figure 1 Enlarged view of point I in the middle;

[0026] Figure 4 for Figure 1 A schematic diagram of the key shaft structure in the diagram;

[0027] Figure 5 for Figure 4 An exploded view of the key shaft in the diagram;

[0028] Figure 6 for Figure 4 An exploded view of the key shaft from another perspective;

[0029] Figure 7 for Figure 4 Top view of the key shaft in the middle;

[0030] Figure 8 for Figure 7 A cross-sectional view along the AA direction.

[0031] Attached Figures: 100-Magnetic induction shaft structure, 10-PCB board, 11-Mounting hole, 12-Hall switch sensor, 20-Key shaft, 21-Base, 211-Sliding cavity, 212-Opening, 213-Through hole, 214-Lower mounting post, 215-First guide structure, 216-Slot, 217-Base, 2171-Hook, 218-Top cover, 2181-Mounting ear, 22-Shaft core, 221-Outer body, 2212-Second guide structure, 222-Inner guide post, 2221-First section, 2222-Second section, 223-Mounting block, 23-Elastic element, 24-Magnetic element, 30-Positioning plate, 31-Positioning hole, 32-Card block. Detailed Implementation

[0032] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation 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.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0035] The present invention will now be described in further detail with reference to the accompanying drawings.

[0036] Please see Figures 1 to 8 The magnetic induction shaft structure 100 provided in the first embodiment of this utility model includes a PCB board 10 and a key shaft 20.

[0037] The PCB board 10 has mounting holes 11 and a Hall effect switch sensor 12. The key shaft 20 is connected to the PCB board 10 and is located in the mounting holes 11. It includes a base 21, a shaft core 22, an elastic element 23, and a magnetic element 24. The base 21 has a sliding cavity 211, an opening 212, and a through-hole 213 that are interconnected. The shaft core 22 is slidably mounted in the sliding cavity 211 and passes through the opening 212. It includes an outer body 221 and an inner guide post 222 located in the outer body 221. The lower end face of the inner guide post 222 does not protrude from the lower end face of the outer body 221. The elastic element 23 is sleeved on the inner guide post 222 and abuts against the bottom wall of the sliding cavity 211 so as to apply an elastic force to the outer body 221. The magnetic element 24 is mounted on the outer body 221 and is located on the side of the elastic element 23. It is used to trigger the Hall effect switch sensor 12 under the drive of the shaft core 22.

[0038] The aforementioned magnetic induction shaft structure 100, by setting the shaft core 22 on which the elastic member 23 is mounted, to include an outer body 221 and an inner guide post 222, and with the lower end face of the inner guide post 222 not protruding from the outer body 221, and the magnetic member 24 disposed on one side of the elastic member 23, eliminates the need for the inner guide post 222 to form a mounting position for the elastic member 24. This allows the entire shaft core 22 to have a smaller height, and when the shaft core 22 is pressed down by pressure, the entire shaft core 22 can move downwards sufficiently, allowing the magnetic member 24 to pass through the through-hole 213 to sense with the Hall switch sensor 12. This avoids the downward pressing stroke being affected by the magnetic member 24, which is mounted inside the inner guide post 222. Therefore, in this embodiment, by setting the inner guide post 222 not to protrude from the outer body 221 and the magnetic member 24 disposed on one side of the elastic member 23, the entire magnetic induction shaft structure 100 can have a lower height, enabling the keyboard to be miniaturized in the height direction when applied to a keyboard.

[0039] In this embodiment, the up-down direction refers to the direction from top to bottom when the magnetic induction shaft structure 100 is placed on the support surface and pressure is applied to the shaft core 22.

[0040] Understandably, the bottom wall of the sliding cavity 211 is provided with a through hole 213, and the magnetic component 24 is provided corresponding to the through hole 213 so that when the shaft core 22 drives the magnetic component 24 to move downward, the magnetic sensor on the PCB board 10 can sense the change in the magnetic field of the magnetic component 24.

[0041] It should be noted that the lower end face of the inner guide post 222 does not protrude from the lower end face of the outer body 221. This can mean that the lower end face of the inner guide post 222 is flush with the lower end face of the outer body 221, or it can be hidden in the lower end face of the outer body 221.

[0042] The shaft core 22 also includes a mounting block 223, which forms a mounting cavity for mounting the magnetic component 24, and the magnetic component 24 is inserted into the mounting cavity.

[0043] Please refer to Figures 6 to 8 To facilitate the installation and guidance of the elastic element 23, a lower mounting post 214 is provided on the bottom wall of the sliding cavity 211. The other end of the elastic element 23 is located outside the lower mounting post 214. The cooperation between the inner guide post 222 and the lower mounting post 214 facilitates the installation of the elastic element 23. At the same time, when the elastic element 23 is compressed, it can guide the expansion and contraction of the elastic element 23 along its own axis, ensuring the stability of the expansion and contraction of the elastic element 23.

[0044] Furthermore, in order to reduce the height in the vertical direction, the inner guide post 222 includes a first section 2221 and a second section 2222 from top to bottom. The outer diameter of the second section 2222 is smaller than the outer diameter of the first section 2221 and smaller than the inner diameter of the lower mounting post 214. In this way, when the shaft core 22 is pressed down by the pressing force, the second section 2222 with the smaller outer diameter can enter into the lower mounting post 214, so that the magnetic component 24 can be close enough to the Hall switch sensor 12. In this way, the material of the magnet in the vertical direction can be reduced, so as to save the installation cost of the magnetic component 24.

[0045] Further, please refer to Figure 8 Since the second segment 2222 needs to enter the lower mounting post 214, the outer diameter of the second segment 2222 and the inner diameter of the lower mounting post 214 gradually decrease from top to bottom. This design allows the decreasing outer diameter of the second segment 2222 to act as a guide when it extends into the lower mounting post 214, facilitating its insertion and removal. In other embodiments, the outer diameter of the entire inner guide post 222 can be set to be the same as and smaller than the inner diameter of the lower mounting post 214, with a clearance fit between the inner guide post 222 and the lower mounting post 214, also achieving the effect of the inner guide post 222 being inserted and removed from the lower mounting post 214.

[0046] Please see Figure 5 and Figure 6In one embodiment of this utility model, in order to ensure the stability of the shaft core 22 during its up-and-down movement, a first guide structure 215 is provided on the base 21, and a second guide structure 2212 is provided on the outer body 221. The first guide structure 215 and the second guide structure 2212 are slidably arranged together. For example, the first guide structure 215 can be configured as a groove in the up-and-down direction, and the second guide structure 2212 can be configured as a slider; or in another embodiment, the first guide structure 215 can be configured as a slider, and the second guide structure 2212 can be configured as a groove extending in the up-and-down direction. Both can achieve the guiding effect on the shaft core 22 when it moves up and down.

[0047] Specifically, in this embodiment, the first guide structure 215 can be configured as a groove, and the second guide structure 2212 can be configured as a slider.

[0048] Please refer to Figure 8 When the elastic element 23 is in its natural state, the height H1 of the key switch 20 in this embodiment ranges from 6.0 to 6.6 mm. Compared to magnetic switches with a height range of approximately 8 mm currently on the market, the key switch 20 in this embodiment avoids the influence of the installation of the magnetic element 24 by improving the mounting method of the elastic element 23 on the switch core 22. It also allows for a shorter elastic element 23 in its natural state, thus achieving a height range of 6.0 to 6.6 mm for the entire key switch 20. This enables keyboard miniaturization when applied to a keyboard. For example, the height of the key switch 20 can be set to values ​​such as 6.0 mm, 6.1 mm, 6.2 mm, 6.3 mm, 6.4 mm, 6.5 mm, or 6.6 mm, and is not limited here.

[0049] Furthermore, based on achieving a key shaft 20 height H1 range of 6.0-6.6mm, the downward pressing stroke of the shaft core 22 in this embodiment ranges from 2.0-2.2mm, and the height H2 of the seat 21 ranges from 4.0-4.5mm. Since the shaft core 22 has a downward pressing stroke, double this stroke is 4.0-4.4mm. Combined with the thickness of the adhesive applied to the elastic element 23 inside the seat 21 and the outer body 221, a height range of 6.0-6.6mm for the entire key shaft 20 can be achieved. The height H2 of the seat 21 can be set to values ​​such as 4.0mm, 4.1mm, 4.2mm, 4.3mm, 4.35mm, or 4.5mm, and is not limited here.

[0050] Please refer to the figure, in which, please refer to Figure 2 as well as Figures 4 to 8In this embodiment, the base 21 includes a detachably connected base 217 and a top cover 218. The base 217 is provided with a hook 2171, and the top cover 218 is provided with a slot 216. The hook 2171 is engaged with the slot wall of the slot 216. Thus, the detachable connection between the base 217 and the top cover 218 is achieved through the cooperation of the hook and the slot.

[0051] Specifically, in this embodiment, two slots 216 are provided on the same side of the upper cover 218, and two hooks 2171 are provided on the same side of the corresponding base 217. One hook 2171 is engaged with one of the slots 216.

[0052] Furthermore, slots 216 are provided on both sides of the upper cover 218, and hooks 2171 are provided on both sides of the base 217, with the slots 216 and hooks 2171 on each side engaging in a corresponding manner.

[0053] In implementing the card slot 216, the upper cover 218 is provided with a mounting ear 2181, which is positioned towards the base 217 and has a card slot 2216. The card hook 2171 is hooked into the card slot from the inside of the upper cover 218 outward.

[0054] Understandably, please refer to Figure 1 refer to Figure 3 To facilitate the installation of the key shaft 20, the magnetic induction shaft structure 100 also includes a positioning plate 30. The positioning plate 30 is located above the PCB board 10 and has a positioning hole 31. The key shaft 20 is located in the positioning hole 31. The positioning plate 30 enables the key shaft 20 to be positioned and installed.

[0055] Please see Figure 2 and Figure 3 In one embodiment of this utility model, when installing the positioning plate 30 and the base 21, the positioning plate 30 is provided with a positioning block 32 at the positioning hole 31. The positioning block 32 is locked in the slot 216. In this way, through the cooperation of the positioning block 32 and the slot 216, the key shaft 20 is installed and fixed in the positioning hole 31, thereby setting a slot 216 on the upper cover 21 to achieve stable installation of the base 217 and the upper cover 218, and at the same time, the locking block can be locked in the slot.

[0056] The aforementioned magnetic induction shaft structure 100, by configuring the shaft core 22 for mounting the elastic element 23 as including an outer body 221 and an inner guide post 222, and with the lower end face of the inner guide post 222 not protruding from the outer body 221, and the magnetic element 24 located on one side of the elastic element 23, the inner guide post 222 does not need to form a mounting position for the elastic element 24. This allows the entire shaft core 22 to have a smaller height, enabling the keyboard to be miniaturized in the height direction when applied to a keyboard. Furthermore, by configuring the inner guide post 222 from top to bottom as including a first segment 2221 and a second segment 2222, the second segment 2222... The outer diameter of the second segment 2222 is smaller than the outer diameter of the first segment 2221 and smaller than the inner diameter of the lower mounting post 214. The smaller outer diameter of the second segment 2222 allows it to enter the lower mounting post 214, thereby allowing the magnetic component 24 to get close enough to the Hall switch sensor 12. This reduces the amount of magnetic material along the vertical direction, saving on the installation cost of the magnetic component 24. By setting the outer diameter of the second segment 2222 and the inner diameter of the lower mounting post 214 to gradually decrease from top to bottom, a guiding effect is provided, facilitating the insertion and removal of the second segment 2222 within the lower mounting post 214.

[0057] In another embodiment of the present invention, a keyboard is also provided, including a housing and the aforementioned magnetic induction shaft structure 100, wherein the magnetic induction shaft structure 100 is installed inside the housing and exposed relative to the housing.

[0058] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A magnetic induction shaft structure (100), characterized in that, include: PCB board (10), wherein a Hall switch sensor (12) is provided on the PCB board (10); A key shaft (20), connected to the PCB board (10), includes a base (21), a shaft core (22), an elastic element (23), and a magnetic element (24), wherein: The seat (21) is provided with a sliding cavity (211), an opening (212) and a through-hole (213) that are interconnected; The shaft core (22) is slidably mounted in the sliding cavity (211) and passes through the opening (212). The shaft core (22) includes an outer body (221) and an inner guide post (222) disposed in the outer body (221). The lower end face of the inner guide post (222) does not protrude from the lower end face of the outer body (221). The elastic element (23) is sleeved outside the inner guide post (222) and abuts against the bottom wall of the sliding cavity (211) so as to apply an elastic force to the outer body (221); The magnetic component (24) is mounted on the outer body (221) and located on the side of the elastic component (23), corresponding to the through-hole (213), for triggering the Hall switch sensor (12) under the drive of the shaft core (22).

2. The magnetic induction shaft structure (100) according to claim 1, characterized in that, The sliding cavity (211) has a lower mounting post (214) on its bottom wall. The other end of the elastic element (23) is sleeved on the lower mounting post (214). The inner guide post (222) includes a first section (2221) and a second section (2222) from top to bottom. The outer diameter of the second section (2222) is smaller than the outer diameter of the first section (2221) and smaller than the inner diameter of the lower mounting post (214).

3. The magnetic induction shaft structure (100) according to claim 2, characterized in that, The outer diameter of the second segment (2222) and the inner diameter of the lower mounting post (214) gradually decrease from top to bottom.

4. The magnetic induction shaft structure (100) according to any one of claims 1-3, characterized in that, When the elastic element (23) is in its natural state, the height H1 of the key shaft (20) ranges from 6.0 to 6.6 mm.

5. The magnetic induction shaft structure (100) according to claim 4, characterized in that, The downward pressing stroke of the shaft core (22) is 2.0-2.2 mm, and the height H2 of the seat (21) is 4.0-4.5 mm.

6. The magnetic induction shaft structure (100) according to any one of claims 1-3, characterized in that, The base (21) is provided with a first guide structure (215), and the outer body (221) is provided with a second guide structure (2212). The first guide structure (215) and the second guide structure (2212) are slidably engaged.

7. The magnetic induction shaft structure (100) according to any one of claims 1-3, characterized in that, The base (21) includes a detachably connected base (217) and a top cover (218). The base (217) is provided with a hook (2171), and the top cover (218) is provided with a slot (216). The hook (2171) is engaged with the slot wall of the slot (216).

8. The magnetic induction shaft structure (100) according to claim 7, characterized in that, The magnetic induction shaft structure (100) further includes a positioning plate (30), which is located above the PCB board (10). The positioning plate (30) has a positioning hole (31), and the key shaft (20) is located in the positioning hole (31). The positioning plate (30) has a positioning block (32), which is inserted into the slot (216).

9. A keyboard, characterized in that, include: case; The magnetic induction shaft structure (100) as described in any one of claims 1-8 is installed inside the housing and exposed relative to the housing.

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