Keyboard opened and closed based on electromagnetic induction principle

Abstract

The utility model relates to the technical field of keyboards, in particular to a keyboard based on an electromagnetic induction principle switch, which comprises an outer frame and a circuit board module arranged in the outer frame, and a plurality of keys are uniformly arranged on the circuit board module. The bottom of the key of the keyboard adopts the structure of the closed bottom plate, so that the metal block cannot protrude out of the bottom of the key, the shaft core is prevented from being influenced by the external environment, the accurate positioning of the switch stroke is improved, the service life of the switch stroke is prolonged, meanwhile, the non-contact interaction mode of the metal block and the induction coil ensures the hand feeling of the switch, and the manufacturing cost is reduced; and popularization and application of the magnetic axis keyboard are facilitated. And when the shaft core is pressed to the bottom, the metal block can collide with the closed bottom plate, so that clear sound (Hifi sound or mahjong sound) is generated, the pressing hand feeling of the key is improved, and the use experience of a user is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of keyboard technology, specifically to a keyboard based on the principle of electromagnetic induction. Background Technology

[0002] With the increasing prevalence of computers, peripheral input devices such as mice and keyboards have become familiar to everyone. Especially in recent years, the e-sports industry has experienced rapid growth, and mice and keyboards are no longer simply input devices. Consumers, especially gamers, have placed higher demands on durability, feel, and versatility. Therefore, a magnetic axis keyboard has emerged on the market. Its magnetic axis uses electromagnetic induction based on the Hall effect to switch signals on and off, solving the wear problem caused by physical contact in mechanical axes. Furthermore, these magnetic axis keys can accommodate different actuation points, allowing users to adjust the key's trigger height according to different scenarios, thus satisfying different usage habits and further enhancing the user experience.

[0003] However, existing magnetic switch keyboards have some shortcomings. In practical applications, to achieve the aforementioned functions, a Hall sensor needs to be placed under each key, making it difficult to further reduce the cost of this type of keyboard and hindering its market expansion. Therefore, a magnetic switch keyboard that replaces the Hall sensor with a coil has also been introduced to the market, thereby reducing the cost of the magnetic switch keyboard through low-cost coils. Figure 1 As shown, this type of magnetic axis key achieves inductive interaction with the coil 13 by relying on a protruding metal rod 20 installed at the bottom of the axis core 5. Although this method can achieve inductive triggering, the structure of the protruding metal rod 20 affects the precise positioning of its switch travel, structural lifespan, and user experience. Therefore, this utility model proposes a keyboard based on the principle of electromagnetic induction. Summary of the Invention

[0004] This invention provides a keyboard based on the principle of electromagnetic induction switches to solve the problems mentioned in the background art.

[0005] The objective of this utility model is achieved through the following means:

[0006] A keyboard based on the principle of electromagnetic induction switches includes an outer frame and a circuit board module disposed within the outer frame. A plurality of keys are evenly arranged on the circuit board module. Each key includes a housing and a pivot that is vertically and flexibly disposed within the housing. A guide groove is provided within the housing. The lower end of the pivot slides into the guide groove via a guide post. A spring is provided on the outside of the guide groove to support the pivot. An induction coil is disposed below each key on the circuit board module. A metal block for interacting with the induction coil is fitted into the bottom of the guide post. A closed base plate is provided at the bottom of the guide groove. When the pivot is lowered to the bottom, the metal block contacts the closed base plate.

[0007] Furthermore, the outer casing is composed of a top cover and a base.

[0008] Furthermore, the upper cover is provided with a positioning groove for accommodating the shaft core, and the inner wall of the positioning groove is evenly provided with a plurality of arc-shaped edges for abutting and engaging with the shaft core.

[0009] Furthermore, two tracks are symmetrically arranged inside the base, and the shaft core slides with the tracks through sliders on both sides, with a hollowed-out groove running through the track and the slider.

[0010] Furthermore, the outer frame consists of a top cover and a bottom support, with the top cover snapped onto the bottom support via a buckle, and the circuit board module disposed between the top cover and the bottom support.

[0011] Furthermore, the inner wall of the outer frame is provided with several buffer members at intervals.

[0012] Furthermore, the buffer extends inward and contacts the circuit board module.

[0013] Furthermore, the circuit board module is connected to the buffer via an outwardly extending bracket.

[0014] Furthermore, the lower end of the circuit board module is provided with a shock-absorbing pad and a honeycomb base plate in sequence.

[0015] Furthermore, a control switch for electrical connection with the circuit board module is provided on one side of the outer frame.

[0016] This invention provides a keyboard based on the principle of electromagnetic induction switches. The keyboard features a closed-bottom structure for the keys, preventing the metal block from protruding from the bottom of the keys. This avoids the influence of the external environment on the switch core, improving the accuracy of the switch travel and extending its lifespan. Simultaneously, the non-contact interaction between the metal block and the induction coil ensures a good tactile feel and reduces manufacturing costs, facilitating the widespread use of magnetic switch keyboards. Furthermore, when the switch core is pressed to the bottom, the metal block collides with the closed bottom plate, producing a crisp sound (Hi-Fi sound or mahjong sound), enhancing the key press feel and ensuring a superior user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an existing electromagnetic induction push-button switch in the background art;

[0018] Figure 2 This is a schematic diagram of the structure of a keyboard based on the principle of electromagnetic induction, according to this utility model.

[0019] Figure 3 This is an exploded schematic diagram of a keyboard based on the principle of electromagnetic induction, according to this utility model.

[0020] Figure 4 This is an exploded view of the buffer component in this utility model;

[0021] Figure 5 This is a schematic diagram of the button structure in this utility model;

[0022] Figure 6 This is an exploded view of the button in this utility model;

[0023] Figure 7 This is a cross-sectional view of the button in this utility model;

[0024] Figure 8 This is a top view of the button in this utility model;

[0025] Figure 9 This is an exploded view of the central shaft of this utility model;

[0026] The labels in the attached diagram are as follows: 1-Outer frame, 1A-Top cover, 1B-Bottom support, 2-Circuit board module, 201-Bracket, 3-Button, 4-Outer shell, 4A-Top cover, 41A-Positioning groove, 42A-Rounded edge, 4B-Base, 41B-Guide groove, 42B-Closed bottom plate, 43B-Railway, 5-Shaft core, 501-Guide column, 502-Slider, 503-Key position, 6-Hollowed groove, 7-Shock damping pad, 8-Honeycomb bottom plate, 9-Buffer, 10-Metal block, 11-Spring, 12-Control switch, 13-Induction coil, 20-Metal rod, 21-Keycap. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] In this embodiment, refer to Figure 2 - Figure 9 The keyboard, specifically implemented based on the principle of electromagnetic induction, includes an outer frame 1 and a circuit board module 2 disposed within the outer frame 1. A plurality of keys 3 are evenly arranged on the circuit board module 2. Each key 3 includes a housing 4 and a shaft core 5 vertically mounted within the housing 4. A guide groove 41B is provided within the housing 4. The lower end of the shaft core 5 slides in conjunction with the guide groove 41B via a guide post 501. A spring 11 for supporting the shaft core 5 is provided on the outer side of the guide groove 41B. An induction coil 13 is disposed below each key 3 on the circuit board module 2. A metal block 10 for interacting with the induction coil 13 is fitted into the bottom of the guide post 501. A closed bottom plate 42B is provided at the bottom of the guide groove 41B. When the shaft core 5 is lowered to the bottom, the metal block 10 contacts the closed bottom plate 42B.

[0029] Furthermore, the outer casing 4 is composed of an upper cover 4A and a base 4B, which are connected by a snap fastener. The upper cover 4A has a positioning groove 41A for accommodating the shaft core 5. The inner wall of the positioning groove 41A is evenly provided with a plurality of arc-shaped edges 42A for abutting against the shaft core 5. The plurality of arc-shaped edges 42A evenly provided on the inner wall of the positioning groove 41A not only limit the movement of the shaft core 5, but also reduce the contact area with the shaft core 5. While ensuring the stable up and down movement of the shaft core 5, it can reduce the friction of the up and down movement of the shaft core 5, reduce the wear of the shaft core 5, and improve the smoothness of pressing the button 3.

[0030] Furthermore, two tracks 43B are symmetrically arranged inside the base 4B. The shaft core 5 slides with the tracks 43B via sliders 502 on both sides. A hollowed-out groove 6 is provided between the tracks 43B and the sliders 502. The hollowed-out groove 6 is designed to reduce the friction between the tracks 43B and the sliders 502, thereby improving the smoothness of the shaft core 5's up-and-down movement and reducing the wear of the shaft core 5.

[0031] Furthermore, the upper end of the spindle core 5 is provided with a key position 503 that can pass through the housing 4. The key position 503 is used to connect the keycap 21 for displaying characters. The key position 503 is arranged in a cross shape, and one of them has an outwardly protruding edge, which serves to prevent foolproof installation and avoid the keycap 21 from being installed in the wrong direction.

[0032] In this embodiment, circuit board module 2 adopts a double-layer design, integrating signal processing and control circuits to ensure the stability and reliability of the electromagnetic induction button 3 switch. The induction coil 13 is wound with high-quality copper wire, featuring high sensitivity and fast response speed, and can accurately detect the up-and-down movement of the shaft core 5.

[0033] When the shaft core 5 descends to the bottom, the metal block 10 contacts the closed base plate 42B. When the button 3 is actually pressed, the shaft core 5 will drive the metal block 10 to move downwards quickly. At that time, the bottom plane of the metal block 10 will collide with the plane of the closed base plate 42B, thereby producing a crisp sound (Hi-fi sound or mahjong sound). The metal block 10 is preferably made of iron, copper, or aluminum.

[0034] In this embodiment, the outer frame 1 consists of a top cover 1A and a bottom support 1B. The top cover 1A is snapped onto the bottom support 1B. The circuit board module 2 is disposed between the top cover 1A and the bottom support 1B. A plurality of buffer members 9 are spaced apart on the inner wall of the outer frame 1. The buffer members 9 extend inward and contact the circuit board module 2, providing cushioning protection and preventing damage to the circuit board module 2 from external impacts. Furthermore, the buffer members 9 are made of elastic materials such as rubber or silicone, providing good elasticity and cushioning effect.

[0035] Furthermore, in this embodiment, the circuit board module 2 is connected to the buffer 9 via an outwardly extending bracket 201 to improve the stability of the connection between the buffer 9 and the circuit board module 2, thereby maintaining the buffering effect.

[0036] Furthermore, a shock-absorbing pad 7 and a honeycomb base plate 8 are sequentially arranged at the lower end of the circuit board module 2. The design of the shock-absorbing pad 7 and the honeycomb base plate 8 further enhances the protection of the circuit board module 2. The shock-absorbing pad 7 can effectively absorb the impact force from below, while the honeycomb base plate 8, with its unique structural characteristics, provides additional rigidity and stability, together ensuring the safety and stability of the circuit board module 2 when subjected to external forces.

[0037] Furthermore, a control switch 12 for electrical connection with the circuit board module 2 is provided on one side of the outer frame 1. The control switch 12 is connected to the circuit board module 2 through a wire and is used to control the keyboard's on / off state and adjust the keyboard's backlight brightness, etc.

[0038] This invention provides a keyboard based on the principle of electromagnetic induction. The key 3 of this keyboard features a closed base plate 42B at its bottom, preventing the metal block 10 from protruding beyond the bottom of the key 3. This avoids the influence of the external environment on the switch core 5, improving the accuracy of the switch travel and extending its service life. Simultaneously, the non-contact interaction between the metal block 10 and the induction coil 13 ensures a good tactile feel and reduces manufacturing costs, facilitating the widespread use of magnetic axis keyboards. Furthermore, when the switch core 5 is pressed to the bottom, the metal block 10 collides with the closed base plate 42B, producing a crisp sound (Hi-fi sound or mahjong sound), enhancing the tactile feel of the key 3 and ensuring a superior user experience.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A keyboard based on the principle of electromagnetic induction, comprising an outer frame (1) and a circuit board module (2) disposed within the outer frame (1), wherein a plurality of keys (3) are uniformly disposed on the circuit board module (2), each key (3) comprising a housing (4) and a shaft (5) disposed in the housing (4) in a height-adjustable manner, wherein a guide groove (41B) is provided within the housing (4), and the lower end of the shaft (5) is slidably engaged with the guide groove (41B) via a guide post (501), wherein a spring (11) for supporting the shaft (5) is provided on the outer side of the guide groove (41B), characterized in that: The circuit board module (2) is provided with an induction coil (13) below the button (3). A metal block (10) for interacting with the induction coil (13) is fitted into the bottom of the guide post (501). A closed bottom plate (42B) is provided at the bottom of the guide groove (41B). When the shaft core (5) is lowered to the bottom, the metal block (10) contacts the closed bottom plate (42B).

2. The keyboard based on the electromagnetic induction principle switch according to claim 1, characterized in that: The outer shell (4) is composed of a top cover (4A) and a base (4B).

3. The keyboard based on the electromagnetic induction principle switch according to claim 2, characterized in that: The upper cover (4A) is provided with a positioning groove (41A) for accommodating the shaft core (5), and the inner wall of the positioning groove (41A) is evenly provided with a plurality of arc-shaped edges (42A) for abutting and engaging with the shaft core (5).

4. A keyboard based on the principle of electromagnetic induction as described in claim 2, characterized in that: Two tracks (43B) are symmetrically arranged inside the base (4B). The shaft (5) slides with the track (43B) through the sliders (502) on both sides. A hollowed-out groove (6) is provided between the track (43B) and the slider (502).

5. A keyboard based on the principle of electromagnetic induction as described in any one of claims 1-4, characterized in that: The outer frame (1) is composed of a top cover (1A) and a bottom support (1B). The top cover (1A) is snapped onto the bottom support (1B) by a buckle. The circuit board module (2) is disposed between the top cover (1A) and the bottom support (1B).

6. A keyboard based on the principle of electromagnetic induction as described in claim 5, characterized in that: The inner wall of the outer frame (1) is provided with several buffer members (9) at intervals.

7. A keyboard based on the principle of electromagnetic induction as described in claim 6, characterized in that: The buffer (9) extends inward and contacts the circuit board module (2).

8. A keyboard based on the principle of electromagnetic induction as described in claim 6, characterized in that: The circuit board module (2) is connected to the buffer (9) via an outwardly extending bracket (201).

9. A keyboard based on the principle of electromagnetic induction as described in any one of claims 6-8, characterized in that: The lower end of the circuit board module (2) is provided with a shock-absorbing pad (7) and a honeycomb base plate (8).

10. A keyboard based on the principle of electromagnetic induction as described in any one of claims 1-4, characterized in that: A control switch (12) for electrical connection with the circuit board module (2) is provided on one side of the outer frame (1).

Images