Magnetic shaft keyboard positioning plate and control plate integrated structure and keyboard

Abstract

The utility model discloses a magnetic shaft keyboard positioning plate and control board integrated structure, including base material board, and etching control circuit on one side of base material board, and welding hall sensor on base material board, and hall sensor and control circuit are located the same side of base material board, still card and be equipped with magnetic shaft button on base material board, and magnetic shaft button is located the one side of base material board away from control circuit. Through the integration of positioning plate and PCB circuit board, the structure is simplified, and the induction trigger error between the magnetic shaft button and the hall sensor caused by the assembly error can be reduced. On the other hand: by integrating the two plates into one plate, the use of materials can be reduced, the cost is saved, and the product has a price advantage. Moreover, the integrated structure of the PCB circuit board and the positioning plate is thinner and lighter, making the keyboard overall more portable.

Description

Technical Field

[0001] This utility model relates to the field of consumer electronics technology, specifically to an integrated structure of a magnetic axis keyboard positioning plate and a control plate, and its keyboard. Background Technology

[0002] With the development of consumer electronics, keyboards have also undergone rapid updates and iterations, evolving from the earliest electronic keyboards to later mechanical keyboards, and finally to the currently popular magnetic axis keyboards. These keyboards rely on Hall effect sensors and permanent magnets on the keys to magnetically inductively input key signals. The main internal hardware structure of this type of magnetic axis keyboard includes a positioning plate for locating the key switches and a PCB circuit control board. However, this modular assembly structure suffers from problems such as structural complexity and large size. Utility Model Content

[0003] The purpose of this invention is to provide an integrated structure of a magnetic axis keyboard positioning plate and a control plate, and a keyboard thereof. By integrating the positioning plate and the PCB circuit board, the structure is simplified.

[0004] This utility model provides an integrated structure of a magnetic axis keyboard positioning plate and a control plate, including a substrate plate, a control circuit etched on one side of the substrate plate, and a Hall sensor soldered on the substrate plate. The Hall sensor and the control circuit are located on the same side of the substrate plate. A magnetic axis button is also mounted on the substrate plate, and the magnetic axis button is located on the side of the substrate plate away from the control circuit.

[0005] Preferably, at least two circular holes are formed on the substrate, and the Hall sensor is located between the two circular holes; two cylinders are fixedly connected to the bottom of the magnetic shaft button, the two cylinders pass through the circular holes, the two cylinders are transitionally fitted with the thickness of the substrate, and the length of the cylinders is the same as the thickness of the substrate; a frustum is fixedly connected to the end of the cylinder away from the magnetic shaft button, the frustum is located on the side of the substrate away from the magnetic shaft button, and the frustum is interference-fitted with the substrate.

[0006] Preferably, a recess is provided on the frustum, the recess is located at the end of the frustum away from the cylinder, and the recess cuts through the frustum along the center of one end of the frustum.

[0007] Preferably, the substrate has at least two rectangular holes, which are located on the outer side of the two circular holes away from the Hall sensor. The magnetic shaft button is also fixedly connected to at least two barbs, which are respectively hooked into the two rectangular holes.

[0008] Preferably, the two barbs are oriented in opposite directions.

[0009] Preferably, the rectangular hole has a notch, which is projected as an arc shape from the axial direction of the magnetic shaft button, and the notch is located on the side of the rectangular opening facing the circular hole.

[0010] Preferably, the substrate has multiple slits, and the slits are projected from the axis direction of the magnetic axis button to form a concave shape, with the magnetic axis button located inside the concave slits.

[0011] This utility model also provides a keyboard, which is equipped with any of the above-described magnetic axis keyboard positioning plate and control board integrated structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by integrating the positioning plate and the PCB circuit board, the structure is simplified, and the sensing triggering error between the magnetic shaft button and the Hall sensor caused by assembly error can be reduced.

[0013] On the other hand, by integrating two boards into one board, the use of materials can be reduced, costs can be saved, and the product has a price advantage.

[0014] Furthermore, this structure, which integrates the PCB circuit board and the positioning plate, is thinner and lighter, making the keyboard more portable overall. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the integrated structure of the magnetic axis keyboard positioning plate and control board of this utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure at point A;

[0017] Figure 3 This is a schematic diagram of the magnetic shaft button in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the substrate plate in this utility model;

[0019] Figure 5 This is a schematic diagram of the keyboard structure of this utility model;

[0020] In the picture:

[0021] 100-Integrated structure of magnetic axis keyboard positioning plate and control plate, 10-Base material board, 11-Round hole, 12-Rectangular hole, 121-Notch, 13-Gap, 20-Control circuit, 30-Hall sensor, 40-Magnetic axis key, 41-Cylinder, 42-Frustum, 421-Recess, 43-Barb, 200-Keyboard. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 4 The present invention provides an integrated structure 100 for a magnetic axis keyboard 200 positioning plate and a control plate, including a substrate plate 10, a control circuit 20 etched on one side of the substrate plate 10, and a Hall sensor 30 soldered on the substrate plate 10. The Hall sensor 30 and the control circuit 20 are located on the same side of the substrate plate 10.

[0024] A magnetic shaft button 40 is also mounted on the substrate 10, and the magnetic shaft button 40 is located on the side of the substrate 10 away from the control circuit 20.

[0025] In implementation, a 0.8mm thick polycarbonate substrate 10 is used as the core carrier, serving as both a positioning plate and a circuit substrate 10. The surface of the substrate 10 is laser-etched to form precision conductive lines, constituting the control circuit 20, which includes signal transmission lines, power lines, and a grounding layer. The line width is 0.1mm, meeting the impedance requirements for high-frequency signal transmission. Multiple surface-mount Hall sensors 30 are soldered to the lower surface of the substrate 10 via reflow soldering and are electrically connected to the pads of the control circuit 20. The sensor spacing follows the standard layout of a 200-key keyboard. Each Hall sensor 30 corresponds to a magnetic axis button 40. The sensor and circuit are arranged on the same side, which simplifies the signal path and reduces impedance interference. The magnetic axis button 40 adopts a snap-fit ​​mechanical structure and is fixed to the lower surface of the substrate 10. The magnetic axis button 40 is embedded with a neodymium iron boron permanent magnet. The magnetic pole direction is perpendicular to the sensing surface of the Hall sensor 30. The magnetic flux density is designed to be 80mT±5mT. The axial deviation between the center of the permanent magnet and the center of the corresponding Hall sensor 30 is ≤0.3mm to ensure triggering accuracy.

[0026] In this way, by integrating the positioning plate and the PCB circuit board, the structure is simplified, and the sensing triggering error between the magnetic shaft button 40 and the Hall sensor 30 caused by assembly errors can be reduced.

[0027] On the other hand, by integrating two boards into one, material usage can be reduced, costs can be saved, and the product has a price advantage.

[0028] Furthermore, this integrated PCB circuit board and positioning plate structure is thinner and lighter, making the keyboard 200 more portable overall.

[0029] For further details, please refer to Figure 1 , Figure 2 and Figure 4 At least two circular holes 11 are provided on the substrate 10, and the Hall sensor 30 is located between the two circular holes 11. Two cylinders 41 are fixedly connected to the bottom of the magnetic shaft button 40. The two cylinders 41 pass through the circular holes 11 and are in transition fit with the thickness of the substrate 10. The length of the cylinders 41 is the same as the thickness of the substrate 10. A frustum 42 is fixedly connected to the end of the cylinder 41 away from the magnetic shaft button 40. The frustum 42 is located on the side of the substrate 10 away from the magnetic shaft button 40 and is in interference fit with the substrate 10.

[0030] In practice, the bottom of the magnetic shaft button 40 is integrally injection molded with two cylinders 41 made of engineering plastic. The diameter is slightly smaller than that of the circular hole 11 to achieve a thickness transition fit. The length of the cylinders 41 is strictly equal to the thickness of the substrate plate 10 to ensure that the initial distance between the permanent magnet and the Hall sensor 30 is constant when the magnetic shaft button 40 is pressed down. The end of the cylinders 41 is integrally formed with a frustum 42 with a taper of 15°. The frustum 42 and the circular hole 11 on the substrate plate 10 form an interference fit, and tool-less disassembly and assembly are achieved through elastic deformation.

[0031] In this way, the two cylinders 41 form a two-point positioning rigid body constraint, completely eliminating magnetic axis deflection and ensuring that the movement trajectory of the permanent magnet on the magnetic axis button 40 coincides with the axis of the Hall sensor 30 throughout the entire process, thus eliminating tilt detection error from a physical perspective.

[0032] Furthermore, the transition fit between the cylinder 41 and the circular hole 11, along with the interference fit between the frustum 42 and the circular hole 11 on the substrate plate 10, constitutes a double self-locking mechanism, eliminating the traditional screw fixing process, improving assembly efficiency, and avoiding magnetic field distortion caused by metal screws.

[0033] Moreover, the conical design of the frustum 42 can compensate for the thickness tolerance of the substrate 10, and the interference fit can automatically adapt to different batches of substrate 10, thereby improving the yield utilization rate of the production line.

[0034] Furthermore, pressing the magnetic shaft button 40 in the opposite direction causes the truncated cone 42 to undergo secondary elastic deformation, allowing for non-destructive disassembly and solving the industry pain point of difficult repair of welded sensors.

[0035] For further details, please refer to Figure 2 and Figure 3 A recess 421 is provided on the frustum 42. The recess 421 is located at the end of the frustum 42 away from the cylinder 41. The recess 421 cuts through the frustum 42 along the center of one end of the frustum 42.

[0036] In this way, the concave groove 421 transforms the solid frustum 42 into an elastic petal structure, which is equivalent to converting rigid interference into controllable elastic deformation, avoiding stress concentration and improving service life.

[0037] For further details, please refer to Figure 2 and Figure 4 The substrate 10 has at least two rectangular holes 12, which are located on the outside of the two round holes 11 away from the Hall sensor 30. The magnetic shaft button 40 is also fixedly connected to at least two barbs 43, which are respectively hooked into the two rectangular holes 12.

[0038] In this way, the barb 43 forms a mechanical hard stop, which, together with the elastic locking of the frustum 42, constitutes a double insurance of rigidity and flexibility.

[0039] For further details, please refer to Figure 1 , Figure 2 and Figure 3 The two barbs 43 are facing opposite directions.

[0040] In this way, the two barbed hooks 43 are arranged with their hook heads facing each other at 180°, forming a mechanically symmetrical system:

[0041] Further, see its references Figure 4 The rectangular hole 12 has a notch 121. The notch 121 is projected as an arc shape from the axis direction of the magnetic shaft button 40. The notch 121 is located on the side of the rectangular hole facing the circular hole 11.

[0042] In this way, stress concentration is eliminated, and the barb 43 can also apply a certain holding force to the cylinder 41 in the round hole 11 through the substrate plate 10, further stabilizing the installation of the magnetic shaft button 40.

[0043] For further details, please refer to [link / reference]. Figure 1 and Figure 4 The substrate 10 has multiple slits 13. The slits 13 projected from the axial direction of the magnetic axis button 40 are concave. The magnetic axis button 40 is located inside the concave slits 13.

[0044] In this way, when the magnetic key 40 is pressed down, the substrate plate 10 inside the concave gap 13 deforms and rebounds, thus achieving different keyboard tactile experiences.

[0045] like Figure 5 The present invention also provides a keyboard 200, which is equipped with any of the above-mentioned magnetic axis keyboard 200 positioning plate and control board integrated structure 100.

[0046] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and are all included within the protection scope of this application.

Claims

1. A magnetic axle keyboard positioning plate and control plate integrated structure, characterized in that: It includes a substrate, a control circuit etched on one side of the substrate, and a Hall sensor soldered to the substrate, wherein the Hall sensor and the control circuit are located on the same side of the substrate. ​ A magnetic shaft button is also mounted on the substrate, and the magnetic shaft button is located on the side of the substrate away from the control circuit.

2. The integrated structure of the magnetic axis keyboard positioning plate and control plate as described in claim 1, characterized in that: At least two circular holes are formed on the substrate, and the Hall sensor is located between the two circular holes; Two cylinders are fixedly connected to the bottom of the magnetic shaft button. The two cylinders pass through the circular hole and are in transition fit with the thickness of the substrate. The length of the cylinders is the same as the thickness of the substrate. A frustum is fixedly connected to the end of the cylinder away from the magnetic axis button. The frustum is located on the side of the substrate away from the magnetic axis button, and the frustum is interference-fitted with the substrate.

3. The integrated structure of the magnetic axis keyboard positioning plate and control plate as described in claim 2, characterized in that: A recess is provided on the frustum, the recess is located at the end of the frustum away from the cylinder, and the recess cuts through the frustum along the center of one end of the frustum.

4. The integrated structure of the magnetic axis keyboard positioning plate and control plate as described in claim 3, characterized in that: The substrate has at least two rectangular holes, which are located on the outer side of the two circular holes away from the Hall sensor. The magnetic shaft button is also fixedly connected to at least two barbs, which are respectively hooked into the two rectangular holes.

5. The integrated structure of the magnetic axis keyboard positioning plate and control plate as described in claim 4, characterized in that: The two barbs are oriented in opposite directions.

6. The integrated structure of the magnetic axis keyboard positioning plate and control plate as described in claim 5, characterized in that: The rectangular hole has a notch, which is projected as an arc shape from the axial direction of the magnetic shaft button, and the notch is located on the side of the rectangular hole facing the circular hole.

7. The integrated structure of the magnetic axis keyboard positioning plate and control plate as described in claim 6, characterized in that: Multiple slits are formed on the substrate. The slits are projected from the axis of the magnetic axis button into a concave shape, and the magnetic axis button is located inside the concave slits.

8. A keyboard, characterized in that: The integrated structure of the magnetic axis keyboard positioning plate and control plate as described in any one of claims 1-7 is included.

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