Optical signal key device

Abstract

The invention provides optical signal key equipment which comprises a keyboard body and keys arranged on the keyboard body and further comprises optical signal transmitting mechanisms, optical signal receiving mechanisms and optical channels which are arranged on the keyboard body, and each optical channel is correspondingly provided with a set of optical signal transmitting mechanism and optical signal receiving mechanism. Each key is correspondingly provided with two optical channels, and each optical channel is correspondingly provided with a plurality of keys; and each key is provided with optical signal triggering pieces corresponding to the two optical channels configured on the key. Two optical channels are arranged for each key, the keys in the same column or row share one optical channel, a group of optical signal receiving and transmitting mechanisms are correspondingly arranged in the optical channels, so that an optical signal array is formed, two optical signals are triggered to change when each key is pressed down, key actions are effectively identified, and the accuracy of key actions is improved. No metal contact is needed, and the device has the advantages of simple structure, low cost and long service life.

Description

Technical Field

[0001] The invention relates to the field of key devices, and in particular to an optical signal key device. Background Art

[0002] With the development of electrification, key devices such as keyboards have penetrated into all aspects of production and life. Common computer keyboards are currently mostly membrane keys or mechanical keys, but they all require switches with metal contacts to trigger key signals. The metal contact solution has some disadvantages, such as the need to add waterproof measures and the metal contacts are prone to poor contact after long-term use. Therefore, some keyboards currently use optical axes for their key shafts, that is, they use optical signals for triggering and identification.

[0003] However, in existing optical axis keyboards, a light emitting device is generally configured for each key position and a corresponding photosensitive device is configured, resulting in a large number of devices, poor reliability, high power consumption and high cost.

[0004] In addition, electronic piano keys, midi keyboards, percussion pads, etc. need to detect the speed of key presses to reflect the strength of the keys, and then trigger different sound effects; currently, two or three contact switches with different trigger depths are generally used to achieve this, and the life span is poor. Game keyboards need to be able to detect the depth of key presses, so that users can customize the trigger depth to achieve the RT function. All of these urgently need a non-contact principle technical innovation solution. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present invention proposes an optical signal key device.

[0006] An optical signal key device includes a keyboard body and keys arranged on the keyboard body, and also includes an optical signal emitting mechanism, an optical signal receiving mechanism and an optical channel respectively arranged on the keyboard body, each optical channel is respectively corresponding to at least one group of optical signal emitting mechanism and optical signal receiving mechanism, each key is corresponding to two optical channels, and each optical channel is corresponding to multiple keys; each key is respectively provided with an optical signal trigger component corresponding to the two optical channels configured thereon.

[0007] Based on the above, the optical signal transmitting mechanism is a light emitting diode, and the optical signal receiving mechanism is a light receiving tube; an MCU controller and a photoelectric conversion circuit are also correspondingly arranged in the keyboard body, the MCU controller controls the connection of the light emitting diode, and the light receiving tube is connected to the MCU controller through the photoelectric conversion circuit.

[0008] Based on the above, the optical channel is a groove set on the keyboard body, one end of the groove is provided with a light signal transmitting mechanism, and the other end of the groove is correspondingly provided with a light signal receiving mechanism; the light signal trigger is a light blocking element or a light filtering element set at the intersection of the two optical channels.

[0009] Based on the above, two optical signal transmitting mechanisms are arranged at intervals at upper and lower ends of one end of the groove, and two optical signal receiving mechanisms are arranged at upper and lower ends of the other end of the groove correspondingly.

[0010] Based on the above, the optical channel is a groove arranged on the keyboard body, and the optical signal transmitting mechanism and the optical signal receiving mechanism are arranged in parallel at the same end of the groove; the optical signal trigger is a light reflecting member arranged at the intersection of the two optical channels.

[0011] Based on the above, the light reflecting member is provided with two figure-eight reflecting surfaces, and the light emitted by the optical signal transmitting mechanism of an optical channel is reflected by one of the figure-eight reflecting surfaces and then reflected via the same optical channel to reach the optical signal receiving mechanism of the optical channel.

[0012] Based on the above, the light reflector is provided with a straight-line reflection surface, and the light emitted by the optical signal transmitting mechanism of one optical channel is reflected by the straight-line reflection surface and then reflected by another optical channel to reach the optical signal receiving mechanism of another optical channel.

[0013] Based on the above, two groups of optical signal transmitting mechanisms and optical signal receiving mechanisms are respectively arranged at intervals up and down at one end of each optical channel.

[0014] Based on the above, each optical channel has two groups of optical signal transmitting mechanisms and optical signal receiving mechanisms, and the signal triggering members include a first triggering member and a second triggering member, respectively. The height of the first triggering member is greater than the height of the second triggering member. The first triggering member corresponds to one group of optical signal transmitting mechanisms and optical signal receiving mechanisms, and the second triggering member corresponds to another group of optical signal transmitting mechanisms and optical signal receiving mechanisms.

[0015] Based on the above, a fixed layer plate is arranged on the keyboard body, and the optical signal transmitting mechanism and the optical signal receiving mechanism are respectively arranged on the fixed layer plate.

[0016] The present invention has outstanding substantive features and significant progress compared to the prior art. Specifically, the present invention sets two optical channels for each key, and multiple keys in the same column or row share one optical channel, and a group of optical signal transceiver mechanisms are correspondingly set in the optical channel, thereby forming an optical signal array. When each key is pressed, the two optical signals are triggered to change, thereby effectively identifying the key action, without the need to use metal contacts, and has the advantages of being simple, convenient, low cost, and long life. The entire key area has no electrical and metal devices, is moisture-proof and impact-resistant, and can also detect the speed and depth of pressing. In reality, there are two reasons for common keyboard failures. One is that liquid invades the key area and causes damage to electrical devices, and the other is that the metal contact of the mechanical key shaft fails or the optical key shaft causes the light-emitting tube or photosensitive tube under the key shaft to be damaged due to key hitting. The present invention can avoid the above common problems and provide a new idea for keyboard design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the internal structure of the keyboard of the present invention (the keypad area and key caps are not shown).

[0018] Figure 2 It is a structural schematic diagram of the optical channel of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the top of the fixed layer plate of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the bottom of the fixed layer plate of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the bottom of the key base of the present invention.

[0022] Figure 6 Schematic diagram of the structure of a key cap in one embodiment of the present invention.

[0023] Figure 7 Schematic diagram of the structure of a key cap in another embodiment of the present invention.

[0024] Figure 8 It is a schematic diagram of the structure of the optical signal triggering component in Example 2 of the present invention.

[0025] Fig. 9 It is a schematic diagram of the principle of optical signals in an optical channel in Embodiment 2 of the present invention.

[0026] Fig.10 It is a schematic diagram of the structure of the optical signal triggering component in Example 3 of the present invention.

[0027] Fig.11 It is a schematic diagram of the principle of optical signals in an optical channel in Embodiment 3 of the present invention.

[0028] Fig.12 It is a structural schematic diagram of the high and low reflection surfaces of the present invention.

[0029] Fig.13 It is a schematic diagram of the circuit structure of the light source of the present invention.

[0030] Fig.14 It is a schematic diagram of the circuit structure of the optical signal receiving mechanism and the control unit of the present invention.

[0031] Explanation of the accompanying drawings: 1. keyboard body; 2. key position; 3. optical channel; 4. key base; 5. key shaft of the key base; 6. fixed layer plate; 7. optical signal transmitting mechanism; 8. optical signal receiving mechanism; 9. light blocking member; 10. key cap; 11. cavity; 12. key shaft of the key cap; 13. shaft connecting groove; 14. figure eight reflecting surface; 15. line one reflecting surface; 151. first reflecting surface; 152. second reflecting surface. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1: The optical signal transmitting mechanism and the optical signal receiving mechanism are respectively arranged at the two ends of the optical channel

[0034] like Figure 1-Figure 2 As shown, an optical signal key device includes a keyboard body 1 and a key arranged on the keyboard body 1, the key shaft has no metal contact, and only completes the functions of vertical pressing and pop-up reset, and also includes an optical signal emitting mechanism 7, an optical signal receiving mechanism 8 and an optical channel 3 respectively arranged on the keyboard body 1, each optical channel is respectively corresponding to at least one group of optical signal emitting mechanism 7 and optical signal receiving mechanism 8, each key is corresponding to two optical channels 3, and each optical channel 3 is corresponding to a plurality of keys; each key is respectively provided with an optical signal trigger component corresponding to the two optical channels 3 configured thereon.

[0035] An optical signal trigger is a device used to trigger changes in optical signals within an optical channel, that is, a device that changes the information transmitted by optical signals between an optical signal transmitting mechanism and an optical signal receiving mechanism, such as a shielding member that blocks the transmission of optical signals, a filtering member that filters part of the wavelength band of an optical signal, etc.

[0036] Taking the optical signal shielding member as an example, an optical signal transmitting mechanism is set at one end of the optical channel and an optical signal receiving mechanism is set at the other end. When in use, under normal conditions, the optical channel 3 is unobstructed, and the optical signal receiving mechanism 8 corresponding to each optical channel 3 can receive the optical signal emitted by the optical signal transmitting mechanism 7. When a key is pressed, the optical signals emitted by the optical signal transmitting mechanism 7 of the two optical channels 3 corresponding to the key are blocked, so that the optical signal receiving mechanism 8 of the two optical channels 3 corresponding to the key cannot receive the optical signal, so that it can be uniquely determined that a key position 2 is pressed, that is, the trigger information of the key is identified. In practice, since each key corresponds to two optical channels 3 respectively, the optical path of each key forms an optical array, and the key position 2 corresponding to each key is the point position in the optical array. By pre-storing the corresponding relationship table between the optical array and the array point position and the key, the trigger information of the key position 2 can be quickly identified according to the change of the received optical signal; this kind of table lookup method is an existing conventional method and will not be repeated.

[0037] Similarly, when the optical signal trigger element is a filter element, the optical signal receiving mechanism can receive the optical signal when no key is pressed, but when a key is pressed, the optical signal in the optical channel is filtered out and part of the target band is filtered out. For example, the green light band in the red and green light signal is filtered out, and the optical signal receiving mechanism only receives the signal in the red light band, thereby identifying and judging the specific key position changes; the principle is similar to the shielding element and will not be repeated.

[0038] Specifically, the optical signal transmitting mechanism 7 is a light emitting diode, and the optical signal receiving mechanism 8 is a light receiving tube. The optical signal emitted by the optical signal transmitting mechanism 7 is a laser; in other embodiments, it may also be infrared light or other spectrums of light. An MCU controller and a photoelectric conversion circuit are also provided in the keyboard body 1 corresponding to the optical signal receiving mechanism 8. The MCU controller controls the light emitting diode to connect to the power supply and emit light continuously in a controlled manner or emit light alternately or strobe at a certain frequency (controlling the light emitting diode through a PWM signal is a common control method). The light receiving tube is connected to the MCU controller through the photoelectric conversion circuit, thereby converting the received optical signal into a level signal and sending it to the MCU controller. The MCU controller can quickly obtain the trigger information of the key position 2 by looking up the table based on the received change information of the optical signal. Fig.13 and Fig.14As shown, the photoelectric conversion circuit adopts a common photoelectric signal conversion circuit, the MCU controller model is STM32F103C8T6, and the photosensitive receiving tube adopts a small-angle infrared pair tube, which is the Everlight IRPT26-21C series ball head 1206 patch transmitting and receiving tube. The MCU controller U1A controls the on and off of the transistors Q2 and Q3 by outputting high and low levels, thereby controlling the on and off of the LED and the power supply, and then controlling the operation of the LED light source. When there is no light signal or the light signal is low, the reverse current of the photosensitive receiving tube RECV1 and / or RECV2 is very small, and the pin of the MCU controller U1A receives a high level from the AD0 end and / or the AD1 end, indicating that a key is pressed; when there is a light signal, the reverse current of the photosensitive receiving tube is large, and the pin of the MCU controller U1A receives a low level from the AD0 end and / or the AD1 end, indicating that no key is pressed. In order to prevent interference between each light source channel and the receiving channel, the groove width or the narrow groove entrance and exit can be set according to the actual situation to limit the light emission angle and the light receiving angle. In this embodiment, a fixed layer plate 6 is provided on the keyboard body 1. Figure 3 and Figure 4 As shown, the optical signal transmitting mechanism 7 and the optical signal receiving mechanism 8 are respectively arranged on the fixed layer plate 6 to facilitate the overall arrangement and installation.

[0039] In this embodiment, the optical channel 3 is a groove arranged on the keyboard body 1, the light emitting diode is arranged at one end of the groove, the optical signal receiving mechanism 8 is arranged at the other end of the groove, and the intersection of the two grooves is the key position 2 of the key. In this embodiment, the optical signal trigger is a shielding member or a light blocking member 9 arranged at the intersection of the two optical channels 3. The light blocking member 9 is an opaque device, and its shape corresponds to the shape of the intersection of the two grooves. The light blocking member 9 is arranged at the bottom of the key shaft of the key. Under normal conditions, the light blocking member 9 at the bottom of the key shaft is above the groove; when the key is pressed, the key shaft moves vertically downward and drives the light blocking member 9 to enter the intersection of the two grooves, thereby blocking the optical signal. At this time, the corresponding optical signal receiving mechanism 8 cannot receive a valid optical signal.

[0040] In the prior art, a key generally includes a key cap, a key shaft and a key base 4, and a key shaft 12 at the bottom of the key cap is arranged on the top of the key shaft 5 of the key base 4 through an axis connecting groove 13, such as Figure 6 As shown, the key shaft 5 is movably arranged on the key base 4, and a reset member such as a spring is arranged in the key base 4 and is used to make the key shaft 5 move vertically up and down and reset. The key structure in the above embodiment adopts the existing structure, and the only difference is that the metal contact at the bottom of the key shaft 5 is cancelled, and a light blocking member 9 is arranged at the bottom of the key shaft 5 of the key base 4, as shown in FIG. Figure 5 In other embodiments, the light signal triggering member may also be disposed on the key cap, such as Figure 7As shown, a cavity 11 for light transmission is provided on the keycap 10, and the height of the fixed layer plate 6 and the optical channel 3 correspond to the cavity setting of the keycap 10. In the normal state where no key is pressed, the optical channel 3 is connected through the light-transmitting cavity 11 on the keycap 10, and the optical signal receiving mechanism 8 receives the optical signal. When the key is pressed, the top thickness of 10 blocks the optical signal of the optical channel 3, and the optical signal receiving mechanism 8 cannot receive the optical signal.

[0041] In reality, for a full keyboard (104 keys), the key arrangement structure of the keypad area is a horizontal and vertical structure, so corresponding optical channels can be set for each row of keys and each column of keys according to the key position; for the key area outside the keypad area, that is, the main key area, there are a total of 6 rows and 14 columns, most of the keys are arranged in a regular tilted column, and the column positions of individual keys at the edge of the letter area are irregular, which is caused by irregular key size, spacing, etc., such as the first row (Esc key and F key row) has multiple empty spaces, the leftmost and rightmost shift keys / backspace keys in the letter area, the space bar in the bottom row, etc., the keys are irregular or large in size, but even the largest space bar actually corresponds to only one trigger key position, so in this embodiment, the letter area is appropriately adjusted so that the columns of the 6 rows and 14 columns of key positions in the letter area are all regularly tilted. Figure 1-Figure 2 The above are just illustrations of the principles. In practice, the key cap widths of some keys, such as the keys on both sides of the space bar, can be appropriately changed or their positions can be shifted left and right to keep the key cap of the space bar at the usual size. The shifted keys can also be kept in regular column positions.

[0042] Embodiment 2: The optical signal transmitting mechanism and the optical signal receiving mechanism are both arranged at the same end of the optical channel

[0043] The difference between this embodiment and the first embodiment is that the position of the optical signal receiving mechanism and the optical signal triggering element are different.

[0044] In this embodiment, the optical channel is a groove arranged on the keyboard body, and an optical signal transmitting mechanism and an optical signal receiving mechanism are arranged in parallel at the same end of the groove; at the same time, the optical signal trigger is a light reflecting member arranged at the intersection of the two optical channels. That is, when no key is pressed, the light emitted by the optical signal transmitting mechanism propagates to the other end of the optical channel, so the optical signal receiving mechanism cannot receive the optical signal; when the key is pressed, the light emitted by the optical signal transmitting mechanism at one end of the optical channel is reflected back to the same end of the optical channel, so that the optical signal receiving mechanism receives the optical signal.

[0045] Specifically, the light reflecting member is provided with an eight-shaped reflecting surface 14, that is, two reflecting surfaces, such as Figure 8As shown, since the key position of each key corresponds to two light channels, each reflective surface of the figure-eight reflective surface corresponds to one light channel, that is, each key is provided with a flat reflective surface corresponding to each light channel. Fig. 9 As shown in the figure, for a certain key, the two corresponding optical channels are optical channel A and optical channel B respectively. Then, after the light emitted by the optical signal transmitting mechanism of optical channel A is reflected by the plane reflecting surface, the reflected light is received and recognized by the optical signal receiving mechanism at the same end of optical channel A ( Fig. 9 At the same time, the light emitted by the optical signal transmitting mechanism of optical channel B is reflected by the plane reflecting surface, and then the reflected light is received and identified by the optical signal receiving mechanism at the same end of optical channel B ( Fig. 9 two blue arrows in the figure).

[0046] Therefore, when a key is pressed, the optical signal trigger changes the direction of the optical signal, thereby changing the received signal of the optical signal receiving mechanism. The two crossed optical channels jointly locate and identify the position of the key, thereby identifying that the target key has been pressed.

[0047] Embodiment 3: The optical signal transmitting mechanism and the optical signal receiving mechanism are both arranged at the same end of the optical channel

[0048] The difference between this embodiment and the second embodiment is that the light reflecting element on the light signal triggering element is a straight-line reflecting surface.

[0049] That is, in this embodiment, the optical channel is a groove arranged on the keyboard body, and the optical signal transmitting mechanism and the optical signal receiving mechanism are arranged horizontally and side by side at the same end of the groove; at the same time, the optical signal trigger is a light reflecting member arranged at the intersection of the two optical channels. That is, when no key is pressed, the light emitted by the optical signal transmitting mechanism propagates to the other end of the optical channel, so the optical signal receiving mechanism cannot receive the optical signal; when the key is pressed, the light emitted by the optical signal transmitting mechanism at one end of the optical channel is reflected to one end of the other optical channel, so that the optical signal receiving mechanism receives the optical signal.

[0050] Specifically, the light reflecting member is provided with a straight-line reflecting surface 15, such as Fig.10 As shown, since each key position corresponds to two light channels, the two light channels are symmetrically arranged corresponding to the straight-line reflection surface, and the symmetrical surface is the vertical surface of the straight-line reflection surface. Fig.11 As shown, for a certain key, the two corresponding optical channels are optical channel A and optical channel B, then the light emitted by the optical signal emitting mechanism of optical channel A is reflected by the straight-line reflection surface 15, and the reflected light is received and identified by the optical signal receiving mechanism at one end of optical channel B ( Fig.11At the same time, the light emitted by the optical signal transmitting mechanism of the optical channel B is reflected by the straight-line reflecting surface 15, and then the reflected light is received and identified by the optical signal receiving mechanism at one end of the optical channel A ( Fig.11 two blue arrows in the figure).

[0051] Therefore, when a key is pressed, the optical signal trigger changes the direction of the optical signal, thereby changing the received signal of the optical signal receiving mechanism. The two crossed optical channels jointly locate and identify the position of the key, thereby identifying that the target key has been pressed.

[0052] Example 4: Key depth / speed recognition

[0053] The difference between this embodiment and embodiments 1-3 is that: two optical signal emitting mechanisms are arranged at intervals in the upper and lower parts, and two optical signal receiving mechanisms are also arranged at intervals in the upper and lower parts. That is, there are two groups of optical signal emitting mechanisms and optical signal receiving mechanisms respectively (in other embodiments, multiple groups can also be arranged respectively), and the heights of the two groups are different, so that when the optical signal triggering member triggers the optical signal, when the optical signal of the first group of optical signal emitting mechanisms and optical signal receiving mechanisms on the upper side is triggered, the key position of the key can be identified, and when the second group of optical signal emitting mechanisms and optical signal receiving mechanisms on the lower side are continuously triggered after the first group of optical signal emitting mechanisms and optical signal receiving mechanisms are triggered, the function corresponding to the key depth can be triggered. In reality, since the relative positions of the two groups of optical signal emitting mechanisms and optical signal receiving mechanisms are fixed, the key pressing speed can also be calculated according to the triggering time interval of the two groups of optical signal emitting mechanisms and optical signal receiving mechanisms.

[0054] Example 5: Key depth / speed recognition

[0055] The difference between this embodiment and embodiment 1 is that the optical signal trigger is a double-layer filter element arranged at the intersection of the two optical channels. That is, the filter element in this embodiment includes a first filter layer and a second filter layer, and the second filter layer is arranged at the bottom of the first filter layer. The filtering ranges of the first filter layer and the second filter layer are different. Therefore, when the second filter layer triggers the optical signal transmitting mechanism and the optical signal receiving mechanism, the key position can be identified, and when the first filter layer continues to trigger the optical signal transmitting mechanism and the optical signal receiving mechanism, the function corresponding to the key depth can be triggered. In reality, since the relative positions of the two filter layers are fixed, the key pressing speed can also be calculated according to the triggering time interval of the two filter layers respectively triggering the optical signal transmitting mechanism and the optical signal receiving mechanism.

[0056] In this embodiment, the light emitted by the optical signal transmitting mechanism contains multiple bands, which are selected according to actual needs. In practice, a shielding layer can be provided between the first filter layer and the second filter layer to increase the relative distance between the two filter layers and improve the recognition effect.

[0057] Example 6: Key depth / speed recognition

[0058] The difference between this embodiment and embodiments 1-3 is that: each optical channel has two groups of optical signal transmitting mechanisms and optical signal receiving mechanisms, the heights of the two groups of optical signal transmitting and receiving mechanisms are on the same horizontal plane, and the signal triggering components include a first triggering component and a second triggering component, the height of the first triggering component is greater than the height of the second triggering component, the first triggering component corresponds to one group of optical signal transmitting mechanisms and optical signal receiving mechanisms, and the second triggering component corresponds to another group of optical signal transmitting mechanisms and optical signal receiving mechanisms. Taking a straight-line reflective surface as an example, Fig.12 As shown, there are two first reflection surfaces 151 and second reflection surfaces 152 of different heights on the same reflection surface, and each key corresponds to two optical channels, and each optical channel has two groups of optical signal transceiver mechanisms. Therefore, in each optical channel, one group of optical signal transceiver mechanisms is set corresponding to the first reflection surface 151, and the other group of optical signal transceiver mechanisms is set corresponding to the second reflection surface 152. When the key is pressed, one group of optical signal transceiver mechanisms is first triggered by reflection from the first reflection surface 151, and the other group of optical signal transceiver mechanisms is then triggered by reflection from the second reflection surface 152. According to the triggering time difference of the two groups of optical signals, the key depth information and key speed information can be obtained. The principles of the shading element and the filter are similar and will not be repeated.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An optical signal key device, comprising a keyboard body and keys arranged on the keyboard body, characterized in that: It also includes an optical signal emitting mechanism, an optical signal receiving mechanism and an optical channel respectively arranged on the keyboard body, each optical channel is respectively provided with at least one group of optical signal emitting mechanism and optical signal receiving mechanism, each key is respectively provided with two optical channels, and each optical channel is correspondingly provided with multiple keys; each key is respectively provided with an optical signal trigger component corresponding to the two optical channels configured thereon.

2. The optical signal key device according to claim 1, characterized in that: The optical signal transmitting mechanism is a light emitting diode, and the optical signal receiving mechanism is a light receiving tube; an MCU controller and a photoelectric conversion circuit are also correspondingly arranged in the keyboard body, the MCU controller controls the light emitting diode, and the light receiving tube is connected to the MCU controller through the photoelectric conversion circuit.

3. The optical signal key device according to claim 1, characterized in that: The optical channel is a groove arranged on the keyboard body, one end of the groove is provided with an optical signal transmitting mechanism, and the other end of the groove is correspondingly provided with an optical signal receiving mechanism; the optical signal trigger is a light blocking member or a light filtering member arranged at the intersection of the two optical channels.

4. The optical signal key device according to claim 3, characterized in that: Two optical signal transmitting mechanisms are arranged at intervals at one end of the groove, and two optical signal receiving mechanisms are arranged at the other end of the groove.

5. The optical signal key device according to claim 1, characterized in that: The optical channel is a groove arranged on the keyboard body, and a light signal transmitting mechanism and a light signal receiving mechanism are arranged in parallel at the same end of the groove; the light signal triggering member is a light reflecting member arranged at the intersection of the two optical channels.

6. The optical signal key device according to claim 5, characterized in that: The light reflecting member is provided with two figure-eight reflecting surfaces. The light emitted by the optical signal transmitting mechanism of an optical channel is reflected by one of the figure-eight reflecting surfaces and then reflected via the same optical channel to reach the optical signal receiving mechanism of the optical channel.

7. The optical signal key device according to claim 5, characterized in that: The light reflecting member is provided with a straight-line reflecting surface. The light emitted by the light signal transmitting mechanism of one light channel is reflected by the straight-line reflecting surface and then reflected by another light channel to reach the light signal receiving mechanism of another light channel.

8. The optical signal key device according to claim 6 or 7, characterized in that: One end of each optical channel is provided with two groups of optical signal transmitting mechanisms and optical signal receiving mechanisms at intervals in the upper and lower parts.

9. The optical signal key device according to claim 3 or 5, characterized in that: Each optical channel has two groups of optical signal transmitting mechanisms and optical signal receiving mechanisms, and the signal triggering members include a first triggering member and a second triggering member, respectively. The height of the first triggering member is greater than the height of the second triggering member. The first triggering member corresponds to one group of optical signal transmitting mechanisms and optical signal receiving mechanisms, and the second triggering member corresponds to another group of optical signal transmitting mechanisms and optical signal receiving mechanisms.

10. The optical signal key device according to claim 1, characterized in that: A fixed layer plate is arranged on the keyboard body, and the optical signal transmitting mechanism and the optical signal receiving mechanism are respectively arranged on the fixed layer plate.

Images