Bilateral light guide key shaft

Abstract

The utility model discloses a bilateral light guide key shaft, which is installed above a PCB (printed circuit board) of a keyboard, and is characterized in that the key shaft comprises a shaft seat, a shaft cover, a key core and at least two light guide plates, the shaft cover is fixedly arranged at the upper end of the shaft seat, the upper end of the key core penetrates through the shaft cover, and the key core and the shaft cover are in sliding fit; the shaft seat comprises at least two vertically-penetrating containing grooves, the light guide plates are correspondingly arranged in the containing grooves in a penetrating mode, the lower ends of the light guide plates are aligned with the LED lamps on the PCB, at least two bayonets are formed in the side portion of the shaft cover, and the upper ends of the light guide plates are correspondingly arranged in the bayonets. The light guide structure has stronger light guide capacity, meanwhile, the key shaft is prevented from shielding light, and the light emitting effect is effectively improved.

Description

Technical Field

[0001] This utility model relates to keyboards, and more particularly to a double-sided light-guided key switch. Background Technology

[0002] To achieve a backlit effect, some keyboards incorporate multiple LEDs on their PCB board. The light emitted by these LEDs passes through the keycaps, creating the backlit effect. Existing technology includes a dual-sided backlit keyboard, as described in Chinese Patent Publication CN221447037U, entitled "Magnetic Axis Keyboard with Dual LED Positions." This patent describes a structure where "LEDs 6 are respectively positioned on both sides of the Hall sensor 4, which can evenly illuminate the key switch 3 and the keycaps 5 mounted on it." However, in this structure, the LEDs are mounted on the PCB board, while the keycaps are located on the top of the key switch, creating a significant distance between the keycaps and the PCB board. Furthermore, to avoid blocking light, slots are needed on the key switch to allow light to pass through. However, slots that are too large can affect the main structure of the key switch, while slots that are too small can block light. Therefore, the existing method of directly scattering light still suffers from technical defects such as light blocking, poor light guiding ability, and unsatisfactory backlit effect. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a double-sided light guide key shaft with strong light guiding ability and improved light emission effect, which addresses the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] A dual-sided light-guided key switch is mounted on the top of a keyboard PCB board. The key switch comprises a key seat, a key cover, a key core, and at least two light guide plates. The key cover is fixed to the upper end of the key seat, and the upper end of the key core passes through the key cover and the two are slidably engaged. The key seat includes at least two vertically penetrating receiving grooves, and the light guide plates are correspondingly inserted into the receiving grooves. The lower end of the light guide plate is aligned with an LED on the PCB board. The side of the key cover has at least two latches, and the upper end of the light guide plate is correspondingly disposed within the latches.

[0006] Preferably, there are two light guide plates, which are symmetrically arranged on both sides of the shaft cover.

[0007] Preferably, the upper end of the light guide plate is formed with a beveled portion, the lower end of the beveled portion extends outward from the light guide plate, and the lower end of the beveled portion abuts against the edge of the receiving groove.

[0008] Preferably, the light guide plate has wedge-shaped portions protruding from both sides along its width direction, and the wedge-shaped portions abut against the inner wall of the receiving groove.

[0009] Preferably, the edge of the shaft cover is formed with an outer edge, and the upper end of the wedge-shaped portion abuts against the outer edge.

[0010] Preferably, the lower end of the light guide plate has a protruding boss, and the bottom surface of the boss is aligned with the LED on the PCB.

[0011] Preferably, the boss portion is a trapezoidal boss portion.

[0012] Preferably, a magnet is fixed at the center of the lower end of the key core, and the magnet is aligned with the Hall sensor on the PCB board.

[0013] In the double-sided light-guided key switch disclosed in this utility model, the key switch seat is fixedly installed above the PCB board, and the lower end of the light guide plate is aligned with the LEDs on the PCB board. The light guide plate passes through the receiving groove near the side of the key switch seat, and the upper end of the light guide plate extends into the bayonet on the side of the key switch cover. When a light-transmitting keycap is installed on the key core, the keycap can cover the light guide plate. The light emitted by the LEDs is conducted through the light guide plate to the keycap, and then scattered outward through the keycap. Compared with the prior art, this utility model has a stronger light guiding capability and avoids the key switch from blocking the light, effectively improving the light emission effect. Attached Figure Description

[0014] Figure 1 This utility model is a three-dimensional double-sided light guide key shaft. Figure 1 ;

[0015] Figure 2 This utility model is a three-dimensional double-sided light guide key shaft. Figure 2 ;

[0016] Figure 3 This is an exploded view of the double-sided light guide keyway of this utility model;

[0017] Figure 4 This is a cross-sectional view of the double-sided light guide key axis of this utility model;

[0018] Figure 5 This is a structural diagram of the shaft cover, key core, and light guide plate.

[0019] Figure 6 This is a 3D view of the light guide plate. Detailed Implementation

[0020] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0021] This utility model discloses a double-sided light-guided key axis, which is mounted on the top of the keyboard's PCB board and combined with... Figures 1 to 6As shown, the key shaft includes a shaft seat 1, a shaft cover 2, a key core 3, and at least two light guide plates 4. The shaft cover 2 is fixed to the upper end of the shaft seat 1, and the upper end of the key core 3 passes through the shaft cover 2 and the two are slidably engaged. The shaft seat 1 includes at least two vertically penetrating receiving grooves 10, and the light guide plates 4 are correspondingly inserted into the receiving grooves 10. The lower end of the light guide plates 4 is aligned with the LED lights on the PCB board. The side of the shaft cover 2 is provided with at least two bayonets 20, and the upper end of the light guide plates 4 is correspondingly disposed in the bayonets 20.

[0022] In the above structure, the pivot 1 is fixedly installed above the PCB board, and the lower end of the light guide plate 4 is aligned with the LEDs on the PCB board. The light guide plate 4 passes through the receiving groove 10 near the side of the pivot 1, and the upper end of the light guide plate 4 extends into the bayonet 20 on the side of the pivot cover 2. When a light-transmitting keycap is installed on the key core 3, the keycap can cover the light guide plate 4. The light emitted by the LEDs is conducted to the keycap through the light guide plate 4, and then scattered outward through the keycap. Compared with the prior art, this utility model has a stronger light guiding capability, while avoiding the key shaft from blocking the light, effectively improving the light-emitting effect.

[0023] In practical applications, each key shaft corresponds to two LEDs. Please refer to [link / reference needed]. Figure 3 The number of light guide plates 4 is two, and the two light guide plates 4 are symmetrically arranged on both sides of the shaft cover 2.

[0024] Please see Figure 3 and Figure 6 In this embodiment, the upper end of the light guide plate 4 has a beveled portion 40, and the lower end of the beveled portion 40 extends outward from the light guide plate 4, abutting against the edge of the receiving groove 10. The beveled portion 40 serves as the light-emitting surface of the light guide plate 4, directly facing the keycap. This beveled portion 40 increases the light-emitting area of ​​the light guide plate 4, enabling the light passing through the keycap to be distributed and scattered more evenly.

[0025] To ensure a tighter fit and connection between the light guide plate 4 and the inner wall of the receiving groove 10, wedge-shaped portions 41 are formed on both sides of the light guide plate 4 along its width direction in this embodiment. The wedge-shaped portions 41 abut against the inner wall of the receiving groove 10. By providing the wedge-shaped portions 41, this embodiment enables the light guide plate 4 to be more tightly fixed within the receiving groove 10.

[0026] Furthermore, the edge of the shaft cover 2 is formed with an outer edge 21, and the upper end of the wedge-shaped portion 41 abuts against the outer edge 21. See also... Figure 5After the shaft cover 2 and the shaft seat 1 are assembled and fixed, the wedge-shaped part 41 abuts against the bottom surface of the outer edge 21, thereby locking and restricting the light guide plate 4 within the receiving groove 10.

[0027] In a preferred embodiment, the lower end of the light guide plate 4 protrudes to form a boss portion 42, the bottom surface of which is aligned with the LED light on the PCB board. Further, the boss portion 42 is a trapezoidal boss portion. The boss portion 42 helps to collect the light emitted by the LED light.

[0028] In practical applications, the keyboard is a magnetic induction keyboard; please refer to [link / reference]. Figure 4 A magnet 5 is fixed at the lower center of the key core 3, and the magnet 5 is aligned with the Hall sensor on the PCB board.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. All modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A double-sided light-guiding key switch, mounted on the top of a keyboard's PCB board, characterized in that, The key shaft includes a shaft seat (1), a shaft cover (2), a key core (3), and at least two light guide plates (4). The shaft cover (2) is fixed to the upper end of the shaft seat (1). The upper end of the key core (3) passes through the shaft cover (2) and the two are slidably engaged. The shaft seat (1) includes at least two vertically penetrating receiving grooves (10). The light guide plates (4) are correspondingly inserted into the receiving grooves (10). The lower end of the light guide plates (4) is aligned with the LED lights on the PCB board. The side of the shaft cover (2) is provided with at least two bayonets (20). The upper end of the light guide plates (4) is correspondingly disposed in the bayonets (20).

2. The dual-sided lighted key shaft of claim 1, wherein, The number of light guide plates (4) is two, and the two light guide plates (4) are symmetrically arranged on both sides of the shaft cover (2).

3. The dual-sided lighted key shaft of claim 1, wherein, The upper end of the light guide plate (4) has a beveled portion (40), the lower end of the beveled portion (40) extends outward from the light guide plate (4), and the lower end of the beveled portion (40) abuts against the edge of the receiving groove (10).

4. The dual-sided lighted key shaft of claim 1, wherein, The light guide plate (4) has wedge-shaped portions (41) protruding from both sides along the width direction, and the wedge-shaped portions (41) abut against the inner wall of the receiving groove (10).

5. The dual-sided lighted key shaft of claim 4, wherein, The edge of the shaft cover (2) is formed with an outer edge (21), and the upper end of the wedge (41) abuts against the outer edge (21).

6. The dual-sided lighted key shaft of claim 1, wherein, The lower end of the light guide plate (4) protrudes to form a boss (42), and the bottom surface of the boss (42) is aligned with the LED light on the PCB board.

7. The dual-sided lighted key shaft of claim 6, wherein, The boss portion (42) is a trapezoidal boss portion.

8. The dual-sided lighted key shaft of claim 1, wherein, A magnet (5) is fixed at the lower center of the key core (3), and the magnet (5) is aligned with the Hall sensor on the PCB board.

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