CN219740349U - Reflective geminate transistors optical axis button - Google Patents

Abstract

The utility model discloses a reflective geminate transistor optical axis key which comprises a bottom shell, an upper shell, a key cap and a PCB (printed circuit board), wherein the bottom shell and the upper shell are oppositely spliced and fixed, the key cap penetrates through the upper shell and is matched with the upper shell in a vertically sliding mode, the PCB is fixed at the bottom of the bottom shell, a key shaft extending downwards is formed at the center of the key cap, a first through hole is formed at the center of the bottom shell, a second through hole is formed at the center of the PCB, the key shaft sequentially penetrates through the first through hole and the second through hole, a reflective notch extending along the upper and lower directions is formed at the side part of the key shaft, an infrared reflective geminate transistor is arranged on the PCB, and the emitting end and the receiving end of the infrared reflective geminate transistor are opposite to the reflective notch. The infrared light reflection type infrared light reflection device can fully reflect infrared light signals, can avoid false induction caused by infrared light leakage and refraction, and is simple in structure and easy to manufacture.

Description

Reflective geminate transistors optical axis button

Technical Field

The utility model relates to a keyboard key, in particular to a reflective geminate transistor optical axis key.

Background

The optical axis key is one type of keyboard, and for related structure, please see the chinese patent publication with publication number CN205789644U, entitled "a mechanical pair axis switch", in which:

the optical pair tube is arranged above the keyboard circuit board and below the switch body, a light channel is arranged below the base, the emitting tube and the receiving tube of the optical pair tube are respectively arranged on two sides of the light channel, and when the shaft core is pressed down, the guide pillar penetrates through the through hole of the base to block the light channel. The utility model can well control the information acquisition of the optical pair tube signal by the main control chip by pressing the key so as to control the luminous signal.

Referring to fig. 1-4 of the specification of the publication, the infrared transmitting tube and the receiving tube are arranged on the circuit board below the base, and the transmitting tube and the receiving tube are symmetrically arranged on two sides of the key shaft, so that the key shaft is circumferential, and therefore, the situation that infrared rays are difficult to be completely shielded, and infrared scattering, refraction and the like exist.

Disclosure of Invention

The utility model aims to solve the technical problems of providing the reflective geminate transistor optical axis key which can fully reflect infrared signals, can avoid false induction caused by infrared leakage and refraction, and has a simple structure and is easy to manufacture.

In order to solve the technical problems, the utility model adopts the following technical scheme.

The utility model provides a reflective geminate transistors optical axis button, its is including drain pan, epitheca, key cap and PCB board, the drain pan with the relative amalgamation of epitheca is fixed, the key cap passes epitheca and the upper and lower sliding fit of two, the PCB board is fixed in the bottom of drain pan, the center department of key cap is formed with downwardly extending's key shaft, first through-hole has been seted up to the center department of drain pan, the second through-hole has been seted up to the center department of PCB board, the key shaft passes in proper order first through-hole with the second through-hole, the reflection notch that extends along upper and lower direction is seted up to the lateral part of key shaft, be equipped with infrared reflection geminate transistors on the PCB board, infrared reflection geminate transistors's transmitting terminal and receiving terminal all with the reflection notch sets up relatively.

Preferably, the light reflecting notch comprises a forward light reflecting surface and two inclined light reflecting surfaces, the two inclined light reflecting surfaces are symmetrically arranged on two sides of the forward light reflecting surface, and the forward light reflecting surface and the infrared reflecting pair tube are oppositely arranged.

Preferably, the light reflecting recess extends downward to the bottom end of the key shaft.

Preferably, the first through hole is a crescent through hole.

Preferably, an upward extending guide post is formed on the inner side of the bottom shell, the guide post is located in the light reflecting notch, and the guide post is in sliding fit with the inner wall of the light reflecting notch.

Preferably, an elastic bow member for driving the key cap to rise is arranged in the bottom shell.

Preferably, the infrared reflection pair tube is positioned on the top surface or the bottom surface of the PCB.

In the reflective pair-tube optical axis key disclosed by the utility model, the infrared reflective pair-tube is arranged on the PCB, the transmitting end and the receiving end of the infrared reflective pair-tube are positioned at one side of the key shaft and are adjacently arranged, when the key cap is pressed down, the key shaft sequentially passes through the first through hole and the second through hole and then moves downwards, meanwhile, the reflective notch at the side part of the key shaft is aligned with the transmitting end and the receiving end of the infrared reflective pair-tube, infrared light emitted by the transmitting end of the infrared reflective pair-tube is received by the receiving end after being reflected by the inner wall of the reflective notch, so that corresponding electric signals are generated, the infrared light signals can be fully reflected under the reflecting action of the reflective notch, and false sensing caused by infrared leakage and refraction can be effectively avoided.

Drawings

FIG. 1 is a perspective view I of a reflective pair of tube optical axis keys before pressing;

FIG. 2 is a second perspective view of a reflective pair of tube optical axis keys before pressing;

FIG. 3 is a perspective view I of a reflective pair of tube optical axis keys after being pressed;

FIG. 4 is a second perspective view of the reflective pair-tube optical axis key after being pressed;

FIG. 5 is an exploded view of a reflective pair-tube optical axis key;

FIG. 6 is an exploded view of a reflective pair-tube optical axis key;

FIG. 7 is a first block diagram of a bottom shell and key cap;

FIG. 8 is a second block diagram of the bottom shell and key cap;

fig. 9 is a perspective view of the key cap.

Detailed Description

The utility model is described in more detail below with reference to the drawings and examples.

The utility model discloses a reflective pair tube optical axis key, which is shown in combination with fig. 1 to 9, and comprises a bottom shell 1, an upper shell 2, a key cap 3 and a PCB (printed circuit board) 4, wherein the bottom shell 1 and the upper shell 2 are oppositely spliced and fixed, the key cap 3 penetrates through the upper shell 2 and is matched with the upper shell and the lower shell in a sliding manner, the PCB 4 is fixed at the bottom of the bottom shell 1, a key shaft 5 extending downwards is formed at the center of the key cap 3, a first through hole 10 is formed at the center of the bottom shell 1, a second through hole 40 is formed at the center of the PCB 4, the key shaft 5 sequentially penetrates through the first through hole 10 and the second through hole 40, a reflective notch 50 extending along the upper and lower directions is formed at the side part of the key shaft 5, an infrared reflective pair tube 6 is arranged on the PCB 4, and a transmitting end and a receiving end of the infrared reflective pair tube 6 are oppositely arranged with the reflective notch 50.

In the above structure, the PCB board 4 is provided with the infrared reflection pair tube 6, the transmitting end and the receiving end of the infrared reflection pair tube 6 are located at one side of the key shaft 5 and are adjacently disposed, when the key cap 3 is pressed down, the key shaft 5 sequentially passes through the first through hole 10 and the second through hole 40 and then moves downward, meanwhile, the light reflecting notch 50 on the side of the key shaft 5 is aligned to the transmitting end and the receiving end of the infrared reflection pair tube 6, the infrared light emitted from the transmitting end of the infrared reflection pair tube 6 is reflected by the receiving end via the inner wall of the light reflecting notch 50 and then is received by the corresponding electric signal, the infrared light signal can be fully reflected under the reflection action of the light reflecting notch 50, and error induction caused by infrared leakage and refraction can be effectively avoided, and meanwhile, the structure of the utility model is simplified, and is easier to manufacture, and better meets the application requirements.

Referring to fig. 9, regarding a preferred structure of the light reflecting recess 50, the light reflecting recess 50 includes a forward reflecting surface 51 and two oblique reflecting surfaces 52, the two oblique reflecting surfaces 52 are symmetrically disposed on two sides of the forward reflecting surface 51, and the forward reflecting surface 51 is disposed opposite to the infrared reflecting pair tube 6.

In the above structure, the forward reflecting surface 51 plays a main role in reflection, and the two oblique reflecting surfaces 52 can further reflect the scattered infrared light toward the receiving end of the pair of tubes 6 by the infrared reflection, so as to improve the accuracy of key motion sensing. In practical application, the infrared reflection pair tube 6 can be a single tube or two tubes, and the utility model is most preferably to use a single infrared reflection tube.

As shown in fig. 7 and 8, in this embodiment, the light reflecting recess 50 extends downward to the bottom end of the key shaft 5.

Further, the first through hole 10 is a crescent through hole. The crescent shaped through hole can be better matched to the light reflecting recess 50.

In order to enable the key shaft 5 to slide up and down better, in this embodiment, an upwardly extending guide post 11 is formed on the inner side of the bottom shell 1, the guide post 11 is located in the light reflecting recess 50, and the guide post 11 is in sliding fit with the inner wall of the light reflecting recess 50.

The embodiment further has an elastic mechanism for driving the keycap 3 to rise and reset, specifically, an elastic bow member 7 for driving the keycap 3 to rise is disposed in the bottom shell 1.

As a preferred structure, the infrared reflection pair tube 6 is located on the top surface or the bottom surface of the PCB board 4. In this embodiment, the infrared reflection pair tube 6 may be disposed on the top surface of the PCB board 4 or the bottom surface thereof, which is not limited by the installation direction of the infrared tube compared with the prior art, and is beneficial to structural layout and flexible design.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the present utility model, and modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included in the scope of the present utility model.

Claims (7)

1. The utility model provides a reflective geminate transistors optical axis button, its characterized in that, including drain pan (1), epitheca (2), key cap (3) and PCB board (4), drain pan (1) with epitheca (2) are relative to amalgamation fixed, key cap (3) pass epitheca (2) and two sliding fit from top to bottom, PCB board (4) are fixed in the bottom of drain pan (1), the center department of key cap (3) is formed with downwardly extending's key shaft (5), first through-hole (10) have been seted up in the center department of drain pan (1), second through-hole (40) have been seted up in the center department of PCB board (4), key shaft (5) pass in proper order first through-hole (10) with second through-hole (40), reflection of light notch (50) that extend along the upper and lower direction are seted up to the lateral part of key shaft (5), be equipped with infrared reflection geminate transistors (6) on PCB board (4), the transmitting end and receiving end of infrared reflection geminate transistors (6) with reflection of light notch (50) are relative to setting.

2. The reflective-pair-tube optical-axis key according to claim 1, wherein the reflective recess (50) comprises a forward reflective surface (51) and two oblique reflective surfaces (52), the two oblique reflective surfaces (52) are symmetrically disposed on two sides of the forward reflective surface (51), and the forward reflective surface (51) is disposed opposite to the infrared reflective pair tube (6).

3. A reflective geminate transistor optical axis key as defined in claim 1, wherein said reflective recess (50) extends down to the bottom end of said key shaft (5).

4. A reflective geminate transistor optical axis key as defined in claim 1, wherein the first through hole (10) is a crescent shaped through hole.

5. The reflective-pair-tube optical-axis key according to claim 4, wherein an upward-extending guide post (11) is formed on the inner side of the bottom case (1), the guide post (11) is located in the reflective recess (50), and the guide post (11) is slidably engaged with the inner wall of the reflective recess (50).

6. The reflective geminate transistor optical axis key according to claim 1, wherein an elastic bow (7) for driving the key cap (3) to rise is arranged in the bottom shell (1).

7. The reflective geminate transistor optical axis key according to claim 1, wherein the infrared reflective geminate transistor (6) is located on the top surface or the bottom surface of the PCB board (4).