A novel linear hall switch

Abstract

The utility model discloses a novel linear hall switch, including bottom shell, with the upper cover of bottom shell's connection, guide core, reset spring and PCB board, the guide core bottom center is provided with the boss part, and the guide core inner wall of boss part both sides is equipped with the guide surface, the inboard of guide surface inlay installation has the locating post, and the inside of locating post is provided with the mounting groove, and the inside of mounting groove is equipped with the magnet, and the magnet top is through the locating plug compression magnet, and is closely connected with mounting groove upper end, the utility model discloses through the closely assembled formula and the injection molding integrated two kinds of ways to magnet installation fixed, improved the stability and adaptability of magnet installation, can choose appropriate fixed mode according to different use scene and magnet specification, avoid the use limitation that causes the single installation structure, and through the setting of magnet, have no physical contact, wear and tear little, long service life and signal output stable and other remarkable advantages, effectively promoted the response speed and operation hand feeling of keyboard.

Description

Technical Field

[0001] This utility model relates to the field of Hall switch technology, and in particular to a novel linear Hall switch. Background Technology

[0002] Hall effect switches play a crucial role in computer keyboards, converting key presses into electrical signals. Computer keyboards are widely used in daily life, and the sensitivity and lifespan of their keys directly impact the user's typing experience.

[0003] A Chinese patent with publication number "CN208226984U" discloses "a linear Hall effect switch". By fixing a magnet inside the button and placing a Hall element on the PCB board below the magnet, a signal input is formed through the interaction between the magnet and the Hall element. The signal input is more stable and the service life is longer. Moreover, it is easy to use by plugging and unplugging. It can be easily operated by general users and produces a mechanical pressing feel and pressing comfort. The pressing is smooth and the feel is good, which improves the market competitiveness of enterprises.

[0004] However, in the Hall switches mentioned above, the magnet is only embedded and lacks a fixing structure for the magnet; moreover, the assembled magnet mounting method has poor stability and cannot meet the stability requirements of one-piece injection molding. Therefore, we propose a new type of linear Hall switch to solve the problems mentioned above. Utility Model Content

[0005] This invention proposes a novel linear Hall switch to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A novel linear Hall effect switch includes a bottom shell, an upper cover connected to the bottom shell, a guide core, a reset spring, and a PCB board. The bottom center of the guide core has a protrusion, and the inner walls of the guide core on both sides of the protrusion have guide surfaces. A positioning post is embedded in the inner side of the guide surface. The positioning post has an installation groove inside, and a magnet is installed inside the installation groove. The magnet is pressed down by a positioning plug above it and is tightly connected to the upper end of the installation groove.

[0008] Preferably, the positioning post, magnet, and positioning plug are assembled as an integral structure.

[0009] Preferably, the bottom of the positioning post is provided with several bottom grooves, which are connected to the mounting groove inside the positioning post. The magnet is placed in the mounting groove and positioned by the bottom groove and the positioning component above. The magnet and the positioning post are injection molded into an integral structure. After molding, the positioning component is pulled out, and several positioning holes are formed at the upper end of the positioning post.

[0010] Preferably, the bottom shell is sealed.

[0011] Preferably, the lower ends of the positioning columns are all installed inside the positioning grooves, and the lower ends of the positioning grooves are fixedly connected to the inner wall of the bottom shell.

[0012] Preferably, the upper end of the reset spring is sleeved on the outside of the positioning post at the bottom of the guide core, and the lower end of the reset spring is sleeved on the outside of the positioning groove.

[0013] Preferably, the upper end of the guide core is provided with a cross-shaped rib structure for installing keycaps, and the upper end of the top cover is provided with a through hole, through which the guide core extends upward.

[0014] Preferably, a set of insert rods is fixedly connected to both sides of the lower end of the bottom shell.

[0015] Preferably, a Hall element is disposed below the bottom shell, and the Hall element is mounted on the PCB board.

[0016] Preferably, a light guide plate is installed on one side of the inner wall of the bottom shell, and the light guide plate is installed on one side of the positioning groove.

[0017] The beneficial effects of this utility model are as follows:

[0018] This new linear Hall effect switch uses two methods to install and fix the magnet: tight assembly and injection molding. This improves the stability and adaptability of the magnet installation and allows for the selection of appropriate fixing methods according to different usage scenarios and magnet specifications, avoiding the limitations caused by a single installation structure. At the same time, the magnet design has significant advantages such as no physical contact, low wear, long service life, and stable signal output, effectively improving the keyboard's response speed and operating feel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0020] Figure 2 This is a schematic diagram of the bottom structure of this utility model.

[0021] Figure 3 This is a cross-sectional view of the interior of this utility model.

[0022] Figure 4 This is a schematic diagram of the disassembled structure of this utility model.

[0023] Figure 5 This is a schematic diagram of the core structure of Embodiment 1 of this utility model.

[0024] Figure 6 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0025] Figure 7 This is a schematic diagram of the core structure of Embodiment 1 of this utility model.

[0026] Figure 8 This utility model Figure 7 Another perspective on the structure.

[0027] The following are the labels in the diagram: 1. Bottom shell; 2. Top cover; 3. Guide core; 301. Protrusion; 4. Positioning post; 401. Bottom groove; 402. Positioning hole; 5. Magnet; 6. Positioning plug; 8. Guide surface; 9. Light guide plate; 10. Return spring; 11. Cross-shaped bone structure; 12. Through hole; 13. Insert rod; 14. Positioning groove; 15. Hall element; 16. PCB board. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Example 1

[0030] Reference Figures 1-5 As shown, a novel linear Hall effect switch includes a bottom shell 1, an upper cover 2 connected to the bottom shell 1, a guide core 3, a reset spring 10, and a PCB board 16. The bottom center of the guide core 3 is provided with a protrusion 301, and the inner wall of the guide core 3 on both sides of the protrusion 301 is provided with a guide surface 8. A positioning post 4 is embedded in the inner side of the guide surface 8. The positioning post 4 has an installation groove inside, and a magnet 5 is installed inside the installation groove. The magnet 5 is pressed by a positioning plug 6 above it and is tightly connected to the upper end of the installation groove. The positioning post 4, the magnet 5, and the positioning plug 6 are assembled into an integral structure. The protrusion 301 creates a gap between the top of the positioning plug 6 and the bottom inner side of the guide core 3. Even if the guide core 3 and the upper keycap shake, the lower positioning post 4 and the magnet 5 will not shake, thereby ensuring that the magnetic flux of the magnet 5 inside remains unchanged and improving the stability of the switch.

[0031] In this embodiment, the bottom shell 1 is sealed, and a Hall element 15 is provided below the bottom shell 1. The Hall element 15 is installed on the bottom PCB board 16. The installed magnet 5 is close to the Hall element 15, so by pressing the keycap on the cross bone structure 11, the bottom guide core 3 can be moved downward, so that the magnet 5 can sense the Hall element 15 through the magnetic lines of force.

[0032] In this embodiment, when the user presses the keyboard cross-shaped rib structure 11, the cross-shaped rib structure 11 drives the guide core 3 to move downward, the guide core 3 drives the positioning post 4 to move downward, and the positioning post 4 drives the magnet 5 to move downward. This causes the magnet 5 to move downward, thereby changing the magnetic field strength around the Hall element 15. After sensing the change in magnetic field, the Hall element 15 outputs a corresponding linear electrical signal. After the signal is processed by the circuit of the PCB board 16, it can accurately reflect the pressing depth and force of the key, thereby realizing precise control of the computer input command.

[0033] In this embodiment, the lower ends of the positioning posts 4 are all installed inside the positioning grooves 14, and the lower ends of the positioning grooves 14 are fixedly connected to the inner wall of the bottom shell 1. The positioning grooves 14 can be used to install and fix the positioning posts 4. A return spring 10 is fixedly connected to the inner wall of the bottom end of the bottom shell 1, and the upper end of the return spring 10 is fixedly connected to the lower end of the guide core 3. The return spring 10 is located on the outside of the positioning grooves 14 and the positioning posts 4. The return spring 10 can quickly drive the guide core 3 and the cross-shaped rib structure 11 to reset after the button operation, ensuring the independence and accuracy of each button operation. Combined with the stable connection between the Hall element 15 and the PCB board 16, it further ensures the timeliness and reliability of the switch signal transmission. The upper end of the guide core 3 is equipped with a cross-shaped rib structure 11, which can protect the upper end of the guide core 3. The upper end of the top cover 2 has a through hole 12, which passes through the outer side of the guide core 3; the through hole 12 facilitates the movement of the guide core 3; a set of plug rods 13 are fixedly connected to both sides of the lower end of the bottom shell 1; the plug rods 13 facilitate the installation and fixation of the Hall switch; a light guide plate 9 is installed on one side of the inner wall of the bottom shell 1, and the light guide plate 9 is installed on one side of the positioning groove 14; the light guide plate 9 provides light to the keyboard.

[0034] Example 2

[0035] Reference Figures 6-8 As shown, unlike Embodiment 1, this embodiment provides an integrally injection-molded guide core 3 and magnet structure. Specifically, the bottom of the positioning post 4 is provided with several bottom grooves 401, which are connected to the mounting groove inside the positioning post 4. The magnet 5 is placed in the mounting groove and positioned by the bottom groove 401 and the positioning member above. The magnet 5 and the positioning post 4 are injection-molded into an integral structure. After molding, the positioning member is pulled out, and several positioning holes 402 are formed at the upper end of the positioning post 4. The integrally injection-molded magnet 5 is directly fixed and encapsulated inside the positioning post 4, which can effectively prevent the magnet from shaking during the up and down movement of the keycap and improve the stability of the signal sensing between the magnet 5 and the Hall element 15 below.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel linear Hall effect switch, comprising a base shell (1), an upper cover (2) connected to the base shell (1), a guide core (3), a reset spring (10), and a PCB board (16), characterized in that, The bottom center of the guide core (3) is provided with a protrusion (301), and the inner wall of the guide core (3) on both sides of the protrusion (301) is provided with a guide surface (8). The inner side of the guide surface (8) is embedded with a positioning post (4). The positioning post (4) is provided with an installation groove, and a magnet (5) is installed inside the installation groove. The magnet (5) is pressed by a positioning plug (6) above the magnet (5) and is tightly connected to the upper end of the installation groove.

2. The novel linear Hall switch according to claim 1, characterized in that, The positioning post (4), magnet (5) and positioning plug (6) are assembled into an integrated structure.

3. The novel linear Hall switch according to claim 1, characterized in that, The bottom of the positioning post (4) is provided with several bottom grooves (401). The bottom grooves (401) are connected to the mounting groove inside the positioning post (4). The magnet (5) is placed in the mounting groove and positioned by the bottom groove (401) and the positioning component above. The magnet (5) and the positioning post (4) are injection molded into an integral structure. After molding, the positioning component is pulled out, and several positioning holes (402) are formed at the upper end of the positioning post (4).

4. The novel linear Hall switch according to claim 1, characterized in that, The bottom shell (1) is sealed.

5. The novel linear Hall switch according to claim 1, characterized in that, The lower ends of the positioning columns (4) are all installed inside the positioning grooves (14), and the lower ends of the positioning grooves (14) are fixedly connected to the inner wall of the bottom shell (1).

6. The novel linear Hall switch according to claim 3, characterized in that, The upper end of the reset spring (10) is sleeved on the outside of the positioning post (4) at the bottom of the guide core (3), and the lower end of the reset spring (10) is sleeved on the outside of the positioning groove (14).

7. The novel linear Hall switch according to claim 1, characterized in that, The upper end of the guide core (3) is provided with a cross-shaped bone structure (11) for installing keycaps, and the upper end of the cover (2) is provided with a through hole (12), through which the guide core (3) extends upward.

8. The novel linear Hall switch according to claim 1, characterized in that, A set of insert rods (13) are fixedly connected to both sides of the lower end of the bottom shell (1).

9. The novel linear Hall switch according to claim 1, characterized in that, A Hall element (15) is disposed below the bottom shell (1), and the Hall element (15) is mounted on the PCB board (16).

10. The novel linear Hall switch according to claim 3, characterized in that, A light guide plate (9) is installed on one side of the inner wall of the bottom shell (1), and the light guide plate (9) is installed on one side of the positioning groove (14).

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