WO2023103496A1

WO2023103496A1 - Optical switch keyboard

Info

Publication number: WO2023103496A1
Application number: PCT/CN2022/117714
Authority: WO
Inventors: 吴福喜; 胡远锋
Original assignee: 东莞市凯华电子有限公司
Priority date: 2021-09-09
Filing date: 2022-09-08
Publication date: 2023-06-15
Also published as: WO2023103836A1; CN216873184U; TWM638201U; CN217824924U; CN217037159U; TWM643656U

Abstract

Disclosed in the present utility model is an optical switch keyboard, comprising a PCB, several key switches arranged on the PCB, and several groups of light conduction assemblies arranged corresponding to the several key switches on a one-to-one basis, wherein each light conduction assembly comprises an infrared transmitting element and a photosensitive receiving element which are arranged opposite each other; and each key switch is provided with a light blocking shaft for blocking light between the infrared transmitting element and the photosensitive receiving element. The optical switch keyboard is characterized in that the lower surface of the PCB is provided with several light blocking covers which correspond to the several groups of light conduction assemblies on a one-to-one basis. The optical switch keyboard provided in the present utility model overcomes the defects of the working performance being unstable and being prone to short circuiting due to abrasion caused by long-term contact of contacts between a positive elastic piece and a negative elastic piece in each key switch in existing mechanical keyboards. In addition, the optical switch keyboard achieves the aims of preventing optical crosstalk, preventing signal interference, and being dustproof and waterproof, thereby facilitating an improvement in the accuracy of turning on and off the key switches on the keyboard.

Description

An optical axis keyboard

technical field

The utility model relates to the technical field of keyboards, in particular to an optical axis keyboard.

Background technique

A mechanical keyboard is a type of keyboard. From a structural point of view, each key of the mechanical keyboard has a separate switch to control the closure. This switch is also called a "axis". According to the classification of the key switch, the mechanical keyboard can be Divided into traditional tea shaft, green shaft, white shaft, black shaft, and red shaft. It is precisely because each button is composed of an independent switch, so the button has a strong sense of paragraph, which produces a special feel suitable for game entertainment, so it is usually used as a relatively expensive high-end game peripheral.

At present, the existing mechanical keyboards are generally conducted through two metal shrapnels, the positive pole and the negative pole. On the one hand, the contacts of the metal shrapnel will wear out due to the mutual contact and impact of the keys when they move up and down, which will lead to a large decline in life and make the working performance of the mechanical keyboard unstable. On the other hand, when water enters the key switch of the mechanical keyboard, it will short-circuit the positive shrapnel and the negative shrapnel, and also corrode the contacts of the two, resulting in poor contact of the contacts, thereby making the function of the mechanical keyboard unstable. And because the cost of mechanical keyboards is generally relatively high, once such unstable working performance occurs, it will greatly affect the user's sense of use, and users are likely to replace the entire mechanical keyboard, which causes unnecessary waste .

Utility model content

In view of the above deficiencies, the purpose of this utility model is to provide an optical axis keyboard, which solves the problem of wear and tear caused by long-term contact between the positive shrapnel and the negative shrapnel in each key switch in the existing mechanical keyboard, resulting in poor working performance. Defects of instability and easy short circuit. At the same time, the purpose of preventing cross-lighting, preventing signal interference, and dustproof and waterproof is achieved, which is beneficial to improving the accuracy of the conduction and disconnection of the key switch on the keyboard.

The technical scheme that the utility model adopts for achieving the above object is:

An optical axis keyboard, comprising a PCB board, several key switches arranged on the PCB board, and an array of light conduction components corresponding to the several key switches one by one, the light conduction components include an infrared ray Emitting element and a photosensitive receiving element, the key switch is provided with a light blocking axis for blocking the light between the infrared emitting element and the photosensitive receiving element, it is characterized in that, the lower surface of the PCB board is provided with an array of light conducting components One-to-one correspondence of several hoods.

As a further improvement of the present utility model, the light conducting component is arranged on the lower surface of the PCB, and the light shield covers the light conducting component therein.

As a further improvement of the present utility model, two first accommodating cavities are arranged in the shading cover, the infrared emitting element is accommodated in one of the first accommodating cavities, and the photosensitive receiving element is accommodated in the other In the first accommodating cavity, a light-shielding wall is respectively formed on the periphery of the two first accommodating cavities; an opening is formed on one side of the light-shielding wall, and the two first accommodating cavities are connected through the opening to form a light passage, And the light channel is located below the light blocking axis.

As a further improvement of the present invention, several first through holes are opened on the PCB for mounting several key switches and passing through the light blocking shaft, and the first through holes are located above the light channel.

As a further improvement of the utility model, the light conducting component is embedded in the PCB board.

As a further improvement of the utility model, the PCB board is provided with two second accommodation cavities, the infrared emitting element is accommodated in one of the second accommodation cavities, and the photosensitive receiving element is accommodated in the other In the second accommodating cavity; several second through holes are provided on the PCB board for installing several key switches and for penetrating the light-shielding axis, and the two second accommodating cavities are connected through the second through holes pass through and form a light channel, and the light channel is located below the light blocking axis.

As a further improvement of the present utility model, an array of mounting hole groups corresponding to the shading cover is provided on the PCB board, and the mounting hole group includes at least one mounting hole; a snap-in mounting hole is provided on the shading cover There is at least one hook inside, and the hook is in one-to-one correspondence with the installation holes.

The beneficial effects of the utility model are:

(1) By adding several shading covers corresponding to the array of light conducting components one by one on the lower surface of the PCB board, it is used to block the light outside the key switch, prevent the external light from causing signal interference to the light conducting components, and avoid the occurrence of serial The problem of light and signal interference; at the same time, the light shield plays a role of dustproof and waterproof for the light conduction component, thus, it is beneficial to improve the accuracy of the conduction and disconnection of the light conduction component, and there will be no false conduction phenomenon .

(2) By using the optical conduction component to realize the conduction and disconnection function of the key switch, it can effectively avoid the problem of wear and tear between the two metal shrapnels of the traditional mechanical keyboard due to the mutual contact and impact of the switch shaft moving up and down, and then Extend the life of the product and make the working performance of the keyboard more stable. At the same time, it effectively prevents the keyboard from short-circuiting between the positive and negative shrapnel due to water ingress, resulting in poor contact and unstable keyboard functions, further ensuring the service life of the keyboard and ensuring the functional stability of the keyboard. Moreover, due to the optical sensing recognition principle and technology used, the sensitivity of the keyboard is further improved, the practicability of the keyboard is improved, and the experience of using the keyboard is better. .

The above is an overview of the technical solution of the utility model, and the utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a partial structural schematic diagram of the optical axis keyboard in Embodiment 1;

Figure 2 is a partial exploded view of the optical axis keyboard in Embodiment 1;

Fig. 3 is a partial sectional view of the optical axis keyboard in Embodiment 1;

Fig. 4 is a schematic diagram of the positions and structures of the infrared emitting element, the photosensitive receiving element and the shading cover in Embodiment 1;

Fig. 5 is a partial sectional view of the optical axis keyboard in the second embodiment.

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the predetermined purpose, the specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

Embodiment one:

Please refer to FIG. 1 to FIG. 3, the present embodiment provides an optical axis keyboard, including a PCB board 1, several key switches 2 arranged on the PCB board 1, and an array corresponding to the several key switches 2 one by one. The light conduction component 3, specifically, the light conduction component 3 includes an infrared emitting element 31 and a photosensitive receiving element 32 arranged oppositely, and the key switch 2 is provided with a A light-blocking axis 20 of the inter-ray, on the lower surface of the PCB board 1, there are several shading covers 4 corresponding to the array of light conducting components 3 one by one, and the shading cover 4 is used to block the light outside the key switch 2 to prevent External light generates signal interference to the light-conducting component 3 , and at the same time, plays a dustproof and waterproof role on the light-conducting component 3 .

In this embodiment, the light blocking shaft 20 is arranged at the lower end of the guide core 21 of the key switch 2, as shown in FIG. At the same time, the spring in the key switch 2 provides elastic restoration force for the upward movement and reset of the guide core 21 . When the guide core 21 is pressed down, the light blocking shaft 20 is driven to move down synchronously, and then the light blocking shaft 20 moves down to between the infrared emitting element 31 and the photosensitive receiving element 32 to block the light emitted by the infrared emitting element 31, then The photosensitive receiving element 32 cannot receive it, that is, the light blocking axis 20 blocks the optical path between the infrared emitting element 31 and the photosensitive receiving element 32, and at this time, a signal is given to the PCB board 1, and this signal is defined as a key switch conduction signal . When the pressure on the guide core 21 is released, the guide core 21 and the light-blocking shaft 20 move up and reset under the drive of the spring, and the light-blocking shaft 20 leaves between the infrared emitting element 31 and the photosensitive receiving element 32, and no longer blocks infrared rays. The optical path between the transmitting element 31 and the photosensitive receiving element 32, the photosensitive receiving element 32 can normally receive the light emitted by the infrared emitting element 31, and at this time give a signal to the PCB board 1, which is defined as a key switch disconnection signal.

Thus, through the combination of the light-blocking shaft 20 and the structure of the light-conducting component 3, the light path between the infrared emitting element 31 and the photosensitive receiving element 32 is turned on or blocked, thereby realizing the turn-on and turn-off functions of the key switch 2 .

In this embodiment, the light conducting component 3 is disposed on the lower surface of the PCB 1 , and the light shield 4 covers the light conducting component 3 therein, as shown in FIG. 3 .

In order to prevent cross-light and signal interference problems, as shown in Figure 4, two first accommodating cavities 41 are arranged in the shading cover 4, and the infrared emitting element 31 is accommodated in one of the first accommodating cavities 41, the photosensitive receiving element 32 is accommodated in another first accommodating cavity 41, and a light-shielding wall 42 is respectively formed on the periphery of the two first accommodating cavities 41; an opening is formed on one side of the light-shielding wall 42 43 , the two first accommodating cavities 41 are connected through the opening 43 and form a light channel, and the light channel is located below the light blocking axis 20 . The infrared emitting element 31 and the photosensitive receiving element 32 are respectively surrounded by the light-shielding wall 42 on the periphery of the two first accommodating cavities 41, so that the light emitted by the infrared emitting element 31 can only be emitted from the optical channel to the photosensitive receiving element 32 for reception, then The light blocking shaft 20 only needs to move down into the light channel to block the light. At the same time, combined with the peripheral wall of the shading cover 4, the external light will not enter, that is, the light emitted by the infrared emitting element 31 is blocked from the external light, so as to prevent the occurrence of cross-light and signal interference problems, thus, it is beneficial to improve the light conduction assembly 3. The accuracy of conduction and disconnection, without false conduction. At the same time, the special structure inside the light shield 4 plays a role of further dustproof and waterproof for the light conducting component 3 .

For the installation of the key switch 2, as shown in Figure 2 and Figure 3, several first through holes 11 for installing several key switches 2 and passing through the light blocking axis 20 are provided on the PCB board 1. The first through hole 11 is located above the light channel. Specifically, the mounting column 22 at the bottom of the key switch 2 is snapped into the first through hole 11 , so that the key switch 2 can be installed on the PCB 1 . At the same time, when the guide core 21 is pressed down, the light-blocking shaft 20 can pass through the mounting post 22 and extend into the light shield 4 to realize light shielding.

For the installation of the shading cover 4, as shown in FIGS. ; The shading cover 4 is provided with at least one hook 44 that snaps into the installation hole 141, the hook 44 corresponds to the installation hole 141 one by one, and the hook 44 snaps into the installation hole 141 to realize the shading The cover 4 is fixedly installed on the lower surface of the PCB 1 . The hook 44 is used to snap in, which facilitates the replacement of the shading cover 5. If a certain shading cover is damaged and needs to be replaced, the damaged shading cover can be snapped out for replacement, reducing the cost of replacement.

In this embodiment, the light conduction component 3 is used to realize the conduction and disconnection functions of the key switch 2, which can effectively avoid the problem of wear and tear between the two metal shrapnels of the traditional mechanical keyboard due to the mutual contact and impact of the switch shaft moving up and down. Then prolong the life of the product and make the working performance of the keyboard more stable. At the same time, it effectively prevents the keyboard from short-circuiting between the positive and negative shrapnel due to water ingress, resulting in poor contact and unstable keyboard functions, further ensuring the service life of the keyboard and ensuring the functional stability of the keyboard. Moreover, due to the optical sensing recognition principle and technology used, the sensitivity of the keyboard is further improved, the practicability of the keyboard is improved, and the experience of using the keyboard is better.

Embodiment two:

The main difference between this embodiment and the first embodiment is that, as shown in FIG. 5 , the light conducting component 3 is embedded in the PCB board 1 . At the same time, two second accommodating cavities 12 are arranged in the PCB board 1, the infrared emitting element 31 is accommodated in one of the second accommodating cavities 12, and the photosensitive receiving element 32 is accommodated in the other first accommodating cavity. Two accommodating cavities 12; several second through holes 13 are provided on the PCB board 1 for installing several key switches 2 and penetrating the light blocking shaft 20, and the two second accommodating cavities 12 pass through The second through hole 13 is connected to form a light channel, and the light channel is located below the light blocking axis 20 .

The infrared emitting element 31 and the photosensitive receiving element 32 are respectively accommodated by the two second accommodating chambers 12, so that the light emitted by the infrared emitting element 31 can only be emitted from the optical channel to the photosensitive receiving element 32 for receiving, and the light blocking axis 20 only needs to Move down into the light tunnel to block out the light. At the same time, the second through hole 13 is surrounded by the peripheral wall of the light shield 4, so that external light will not enter from the second through hole 13, that is, the light emitted by the infrared emitting element 31 is blocked from the external light to prevent cross-light and signal from occurring. The problem of interference, thus, is beneficial to improve the accuracy of turning on and off of the light conducting component 3 without misconducting. At the same time, the shading cover 4 plays a role of further dustproof and waterproof for the light conducting component 3 .

In this embodiment, the mounting column 22 at the bottom of the key switch 2 is also snapped into the second through hole 13 , so that the key switch 2 can be mounted on the PCB 1 . The difference is that a transverse perforation corresponding to the light channel is also formed on the mounting post 22 , which facilitates the photosensitive receiving element 32 to receive the light emitted by the infrared emitting element 31 . When the guide core 21 is pressed down, the light blocking shaft 20 can pass through the mounting column 22 , that is, enter the light channel, so as to shield the light.

What needs to be explained here is that the optical axis keyboard disclosed in the utility model is to improve the specific structure, but the specific control method is not the innovation point of the utility model. For the infrared emitting element, photosensitive receiving element and other parts involved in the utility model, it can be a general standard part or a part known to those skilled in the art, and its structure, principle and control method are obtained by those skilled in the art through the technical manual. Known or known through routine experimental methods.

The above are only preferred embodiments of the present utility model, and are not intended to limit the technical scope of the present utility model. Therefore, other structures obtained by adopting the same or similar technical characteristics as the above-mentioned embodiments of the present utility model can be obtained. Within the protection scope of the present utility model.

Claims

An optical axis keyboard, comprising a PCB board, several key switches arranged on the PCB board, and an array of light conduction components corresponding to the several key switches one by one, the light conduction components include an infrared ray Emitting element and a photosensitive receiving element, the key switch is provided with a light blocking axis for blocking the light between the infrared emitting element and the photosensitive receiving element, it is characterized in that, the lower surface of the PCB board is provided with an array of light conducting components One-to-one correspondence of several hoods.
The optical axis keyboard according to claim 1, wherein the light conducting component is arranged on the lower surface of the PCB, and the light shield covers the light conducting component therein.
The optical axis keyboard according to claim 2, wherein two first accommodation cavities are arranged in the shading cover, the infrared emitting element is accommodated in one of the first accommodation cavities, and the photosensitive The receiving element is accommodated in another first accommodating cavity, and a light-shielding wall is respectively formed on the periphery of the two first accommodating cavities; an opening is formed on one side of the light-shielding wall, and the two first accommodating cavities pass through the opening are connected and form a light channel, and the light channel is located below the light blocking axis.
The optical axis keyboard according to claim 3, wherein a plurality of first through holes are provided on the PCB board for installation of a plurality of key switches and for passage of the optical axis, and the first through holes are located at above the light channel.
The optical axis keyboard according to claim 1, wherein the light conducting component is embedded in the PCB board.
The optical axis keyboard according to claim 5, wherein two second accommodating cavities are arranged in the PCB board, the infrared emitting element is accommodated in one of the second accommodating cavities, and the photosensitive The receiving element is accommodated in another second accommodating cavity; several second through holes are opened on the PCB board for installing several key switches and for penetrating the light-blocking axis. The two second accommodating The cavities are connected through the second through hole to form a light channel, and the light channel is located below the light blocking axis.
The optical axis keyboard according to any one of claims 1 to 6, wherein an array of mounting hole groups corresponding to the light shield one-to-one is provided on the PCB, and the mounting hole group includes at least one mounting hole; At least one hook that snaps into the installation hole is arranged on the light shield, and the hook corresponds to the installation hole one by one.