CN112905019A - Keyboard based on infrared induction keys - Google Patents
Keyboard based on infrared induction keys Download PDFInfo
- Publication number
- CN112905019A CN112905019A CN202110176131.5A CN202110176131A CN112905019A CN 112905019 A CN112905019 A CN 112905019A CN 202110176131 A CN202110176131 A CN 202110176131A CN 112905019 A CN112905019 A CN 112905019A
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- China
- Prior art keywords
- infrared
- keyboard
- key
- receiving element
- keys
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/0202—Constructional details or processes of manufacture of the input device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
- H03K17/943—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector using a plurality of optical emitters or detectors, e.g. keyboard
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
The invention discloses a keyboard based on infrared induction keys, which comprises a keyboard body, wherein the keyboard body is provided with a PCBA board and a plurality of keys, one side of each key is provided with an infrared transmitting element, the other side of each key is provided with an infrared receiving element, the infrared transmitting element and the infrared receiving element which are positioned at the same key are opposite, and the infrared transmitting element and the infrared receiving element are respectively and electrically connected with the PCBA board. The invention is applied to the technical field of keyboards.
Description
Technical Field
The invention relates to the technical field of keyboards, in particular to a keyboard based on infrared induction keys.
Background
In the prior art, a mechanical shaft or a conductive film is used as a conducting key of a traditional keyboard, due to the existence of the structures, the thickness of the keyboard is thick, the structure is complex, the manufacturing cost is high, the keyboard is not suitable for large-scale installation and use, the keyboard is easily polluted and interfered by dust in a working environment, and after the keyboard is used for a long time, the key is not sensitive to counter strain.
Disclosure of Invention
Technical problem to be solved
A keyboard based on infrared induction keys solves the technical problems of complex structure, high manufacturing cost, unsuitability for mass installation and use, insensitive key response and short service life.
(II) technical scheme
In order to solve the technical problem, the invention provides a keyboard based on infrared induction keys, which comprises a keyboard body, wherein the keyboard body is provided with a PCBA board and a plurality of keys, one side of each key is provided with an infrared transmitting element, the other side of each key is provided with an infrared receiving element, the infrared transmitting element and the infrared receiving element which are positioned at the same key are opposite, and the infrared transmitting element and the infrared receiving element are respectively and electrically connected with the PCBA board.
In a further improvement, the infrared light emitting element is an infrared light emitting diode, and the infrared receiving element is an infrared receiving transistor.
In a further improvement, two transverse sides of each key position are respectively provided with an infrared transmitting element and an infrared receiving element which are opposite, and two longitudinal sides of each key position are also respectively provided with an infrared transmitting element and an infrared receiving element which are opposite.
In a further improvement, the keyboard body comprises an upper cover and a lower cover, the PCBA is positioned between the upper cover and the lower cover, the upper cover is provided with a plurality of key holes, each key hole forms a key position, and the infrared transmitting element and the infrared receiving element which are positioned at the same key position are respectively positioned at two sides of the key hole.
Further improved, the upper cover is embedded with a lampshade, the PCBA board is provided with an LED lamp, and the lampshade is sleeved on the LED lamp.
In a further improvement, a support plate is arranged between the lower cover and the PCBA.
In a further improvement, the upper cover, the PCBA, the support plate and the lower cover are connected through a group of bolt structures.
In a further improvement, the supporting plate is an iron plate.
In a further improvement, foot pads are respectively arranged at the corners of the bottom end of the lower cover.
(III) advantageous effects
The keyboard based on the infrared induction keys performs light reaction through the infrared transmitting element and the infrared receiving element, and the triggering principle is that resistors with different resistance values formed by light induction are judged to control the on-off of the keys. When a user's finger is pressed on the key position, the light path between the infrared transmitting element and the infrared receiving element is blocked, so that the resistance value of the infrared switch on the PCBA board can be changed to be infinite, and after the MCU IO port of the PCBA board receives the infinite resistance value, the key is judged to be pressed, and then the corresponding key code value is sent to a system, so that the function of the key is realized. On the contrary, when the user does not press the key position, the finger does not block the optical path between the infrared transmitting element and the infrared receiving element, so that the infrared switch tube has enough light, therefore, the resistance value is very small and is close to zero, and when the MCU IO port of the PCBA board receives the zero resistance value, the judgment that the key position is not pressed is carried out, namely, the code sending is not carried out. Therefore, the keyboard based on the infrared induction keys judges the open circuit and the access through the resistance value of the optical access, thereby realizing the function of key switches.
According to the keyboard based on the infrared induction keys, the mechanical shaft or the conductive film in the traditional keyboard is replaced by the key positions, the infrared transmitting element and the infrared receiving element, so that the structure is simple, the manufacturing cost is reduced greatly, the manufacturing is very convenient, and the mass production can be realized. The device is not easily polluted and interfered by dust in the working environment, and can still be sensitive in reaction and long in service life after being used for a long time.
Drawings
Fig. 1 is an exploded view of a keyboard based on infrared sensing keys according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the keyboard based on the infrared induction keys is characterized by comprising a keyboard body 1, wherein the keyboard body 1 is provided with a PCBA board 2 and a plurality of keys, one side of each key is provided with an infrared transmitting element 3, the other side of each key is provided with an infrared receiving element 4, the infrared transmitting element 3 and the infrared receiving element 4 which are positioned at the same key are opposite, and the infrared transmitting element 3 and the infrared receiving element 4 are respectively and electrically connected with the PCBA board 2.
The keyboard based on the infrared induction keys of the embodiment performs light reaction through the infrared transmitting element 3 and the infrared receiving element 4, and the triggering principle is that resistors with different resistance values formed by light induction are judged to control the on-off of the keys. When a user's finger is pressed on the key position, the light path between the infrared transmitting element 3 and the infrared receiving element 4 is blocked, so that the resistance value of the infrared switch on the PCBA board 2 can become infinite, and after the MCU IO port of the PCBA board 2 receives the infinite resistance value, the key is judged to be pressed, and then a corresponding key code value is sent to a system, so that the function of the key is realized. On the contrary, when the user does not press the key position, the finger does not block the optical path between the infrared transmitting element 3 and the infrared receiving element 4, so that the infrared switch tube has enough light, therefore, the resistance value is very small and close to zero, and when the MCU IO port of the PCBA board 2 receives the zero resistance value, the judgment that the key position is not pressed, namely, the code can not be sent is made. Therefore, the keyboard based on the infrared induction keys of the embodiment judges the open circuit and the access through the resistance value of the light access, so that the function of the key switch is realized.
The keyboard based on the infrared induction keys of the embodiment replaces a mechanical shaft or a conductive film in the traditional keyboard by the key positions, the infrared transmitting element 3 and the infrared receiving element 4, so that the structure is simple, the manufacturing cost is reduced greatly, the manufacturing is very convenient, and the mass production can be realized. The device is not easily polluted and interfered by dust in the working environment, and can still be sensitive in reaction and long in service life after being used for a long time.
Further, in an embodiment, the infrared light emitting element is an infrared light emitting diode, and the infrared receiving element 4 is an infrared receiving transistor, so that the cost is low and the manufacturing is simple.
Further, in an embodiment, two lateral sides of each key position are respectively provided with an infrared transmitting element 3 and an infrared receiving element 4 which are opposite, two longitudinal sides of each key position are also respectively provided with an infrared transmitting element 3 and an infrared receiving element 4 which are opposite, and the infrared transmitting element 3 and the infrared receiving element 4 respectively perform light reaction in the lateral direction and the longitudinal direction, so that the influence on key judgment after the infrared transmitting element 3 and the infrared receiving element 4 are in failure can be prevented, the influence on use is avoided, the key position can be ensured to be triggered by a user, and the key position is simple in structure, easy to install and low in price. The horizontal direction defined in this embodiment is the length direction of the keyboard body 1, and the vertical direction is the width direction of the keyboard body 1.
Further, in an embodiment, the keyboard body 1 comprises an upper cover 11 and a lower cover 12, the PCBA board 2 is located between the upper cover 11 and the lower cover 12, the upper cover 11 is provided with a plurality of key holes 5, each key hole 5 forms a key position, and the infrared transmitting element 3 and the infrared receiving element 4 which are located at the same key position are respectively located at two sides of the key hole 5. The key hole 5 is equivalent to a key of a traditional keyboard, directly replaces a mechanical shaft, a conductive film, a keycap and the like of the traditional keyboard, and has a relatively simple structure. The upper cover 11 and the lower cover 12 are used to fix and mount components such as the PCBA board 2.
Further, in an embodiment, a lampshade 6 is embedded in the upper cover 11, an LED lamp is arranged on the PCBA board 2, the lampshade 6 is sleeved on the LED lamp, the LED lamp is used for displaying a keyboard, and the lampshade 6 is used for transmitting light of the LED lamp.
Further, in an embodiment, a support plate 13 is provided between the lower cover 12 and the PCBA board 2, the support plate 13 being adapted to support the PCBA board 2 and the upper cover 11.
Further, in an embodiment, the upper cover 11, the PCBA board 2, the support plate 13 and the lower cover 12 are connected through a set of bolt structures 7, and specifically, the upper cover 11, the PCBA board 2, the support plate 13 and the lower cover 12 are connected through a total of eight bolts, so that the structure is simple.
Further, in one embodiment, the supporting plate 13 is an iron plate having a larger density for weighting.
Further, in an embodiment, the foot pads 8 are respectively disposed at the corners of the bottom end of the lower cover 12, and the foot pads 8 are used for supporting the lower cover 12 and the entire keyboard body 1, so that the user has a better use experience.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A keyboard based on infrared induction keys is characterized by comprising a keyboard body, wherein the keyboard body is provided with a PCBA board and a plurality of keys, one side of each key is provided with an infrared transmitting element, the other side of each key is provided with an infrared receiving element, the infrared transmitting element and the infrared receiving element which are positioned at the same key are opposite, and the infrared transmitting element and the infrared receiving element are respectively and electrically connected with the PCBA board.
2. The keyboard of claim 1, wherein the infrared light emitting element is an infrared light emitting diode, and the infrared receiving element is an infrared receiving transistor.
3. The keyboard as claimed in claim 1, wherein each key has opposite infrared transmitting and receiving elements on its lateral sides, and opposite infrared transmitting and receiving elements on its longitudinal sides.
4. The keyboard based on the infrared induction keys as claimed in any one of claims 1 to 3, wherein the keyboard body comprises an upper cover and a lower cover, the PCBA is positioned between the upper cover and the lower cover, the upper cover is provided with a plurality of key holes, each key hole forms a key position, and the infrared transmitting element and the infrared receiving element which are positioned at the same key position are respectively positioned at two sides of the key hole.
5. The keyboard based on the infrared induction keys as claimed in claim 4, wherein a lampshade is embedded on the upper cover, an LED lamp is arranged on the PCBA, and the lampshade is sleeved on the LED lamp.
6. The keyboard of claim 4, wherein a support plate is disposed between the lower cover and the PCBA.
7. The keyboard of claim 4, wherein the upper cover, the PCBA, the support plate and the lower cover are connected by a set of bolt structures.
8. The keyboard of claim 7, wherein the support plate is an iron plate.
9. The keyboard based on the IR-sensitive keys as recited in claim 4, wherein the bottom of the bottom cover has foot pads at its corners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176131.5A CN112905019A (en) | 2021-02-07 | 2021-02-07 | Keyboard based on infrared induction keys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176131.5A CN112905019A (en) | 2021-02-07 | 2021-02-07 | Keyboard based on infrared induction keys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112905019A true CN112905019A (en) | 2021-06-04 |
Family
ID=76122953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110176131.5A Pending CN112905019A (en) | 2021-02-07 | 2021-02-07 | Keyboard based on infrared induction keys |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112905019A (en) |
-
2021
- 2021-02-07 CN CN202110176131.5A patent/CN112905019A/en active Pending
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