Optical signal key device

Abstract

The utility model 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 respectively arranged on the keyboard body, and each optical channel is respectively and correspondingly provided with a group of optical signal transmitting mechanisms and optical signal receiving mechanisms. 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. According to the utility model, each key is respectively provided with two optical channels, a plurality of keys in the same column or row share one optical channel, and a group of optical signal transmitting and receiving mechanisms are correspondingly arranged in the optical channels, so that an optical signal array is formed, and when each key is pressed down, two optical signals are triggered to change, thereby effectively identifying the key action, and improving the accuracy of key operation. No metal contact is needed, and the device has the advantages of simple structure, low cost and long service life.

Description

Technical Field

[0001] This utility model relates to the field of button devices, and in particular to an optical signal button device. Background Technology

[0002] With the development of electrification, keypad devices such as keyboards have penetrated into all aspects of production and daily life. Common examples include computer keyboards, which are currently mostly membrane or mechanical keys, but both require metal contact switches to trigger key signals. The metal contact solution has some drawbacks, such as the need for waterproofing and the tendency for metal contacts to deteriorate after prolonged use. Therefore, some keyboards now use optical switches, which employ light signals for triggering and recognition.

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

[0004] Furthermore, electronic keyboards, MIDI keyboards, and drum pads require the detection of key press speed to reflect the pressure applied, thereby triggering different sound effects. Currently, this is commonly achieved using contact switches with two or three different actuation depths, resulting in a relatively short lifespan. Gaming keyboards, on the other hand, need to detect key press depth, allowing users to customize the actuation depth for RT (Real Time) functionality. All of these urgently require a non-contact technology innovation solution. Summary of the Invention

[0005] In order to solve the problems existing in the background art, this utility model proposes an optical signal keypad device.

[0006] A light signal keypad device includes a keyboard body and keys disposed on the keyboard body. It also includes a light signal emitting mechanism, a light signal receiving mechanism, and light channels disposed on the keyboard body. Each light channel is respectively provided with at least one set of light signal emitting mechanism and light signal receiving mechanism. Each key is provided with two light channels, and multiple keys are provided on each light channel. Each key is provided with a light signal trigger corresponding to its two configured light channels.

[0007] Based on the above, the light signal emitting mechanism is a light-emitting diode, and the light signal receiving mechanism is a light-receiving tube; the keyboard body is also equipped with an MCU controller and a photoelectric conversion circuit, the MCU controller controls 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, with a light signal emitting mechanism at one end of the groove and a corresponding light signal receiving mechanism at the other end of the groove; the light signal trigger is a light blocking or filtering component set at the intersection of the two optical channels.

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

[0010] Based on the above, the optical channel is a groove set on the keyboard body, and an optical signal transmitting mechanism and an optical signal receiving mechanism are respectively arranged side by side at the same end of the groove; the optical signal trigger is a light reflector set at the intersection of the two optical channels.

[0011] Based on the above, the light reflector is provided with two figure-eight shaped reflective surfaces. The light emitted by the light signal emitting mechanism of one light channel is reflected by one of the reflective surfaces of the figure-eight shaped reflective surfaces and then reflected through the same light channel to the light signal receiving mechanism of that light channel.

[0012] Based on the above, the light reflector is provided with a line-shaped reflective surface. The light emitted by the light signal emitting mechanism of one light channel is reflected by the line-shaped reflective surface and then reflected by another light channel to the light signal receiving mechanism of another light channel.

[0013] Based on the above, each optical channel has two sets of optical signal transmitting mechanisms and optical signal receiving mechanisms arranged at intervals on one end.

[0014] Based on the above, each optical channel has two sets of optical signal transmitting and receiving mechanisms, 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 is set for one set of optical signal transmitting and receiving mechanisms, and the second triggering component is set for another set of optical signal transmitting and receiving mechanisms.

[0015] Based on the above, a fixed shelf is provided on the keyboard body, and the optical signal transmitting mechanism and the optical signal receiving mechanism are respectively set on the fixed shelf.

[0016] This invention represents a substantial improvement over existing technologies. Specifically, it sets two optical channels for each key, with multiple keys in the same column or row sharing a single optical channel. A set of optical signal transceivers is installed within each optical channel, forming an optical signal array. Each key press triggers changes in both optical signals, effectively identifying key presses. This eliminates the need for metal contacts, offering advantages such as simplicity, convenience, low cost, and long lifespan. The entire key area contains no electrical or metal components, making it moisture-proof and impact-resistant. It also detects the speed and depth of key presses. Common keyboard malfunctions in reality stem from two main causes: liquid intrusion into the key area damaging electrical components, and malfunction of the metal contacts on the mechanical key switches or damage to the LEDs or photosensitive tubes beneath the optical key switches caused by key presses.

[0017] This invention avoids the aforementioned common problems and provides a completely new approach to keyboard design. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of the keyboard of this utility model (the numeric keypad area and keycaps are not shown).

[0019] Figure 2 This is a schematic diagram of the optical channel structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the top of the fixed shelf of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the bottom of the fixed layer of this utility model.

[0022] Figure 5 This is a schematic diagram of the bottom structure of the key socket of this utility model.

[0023] Figure 6 This is a schematic diagram of the keycap structure in one embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the keycap structure in another embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the optical signal triggering device in Embodiment 2 of this utility model.

[0026] Figure 9 This is a schematic diagram illustrating the principle of the optical signal within the optical channel in Embodiment 2 of this utility model.

[0027] Figure 10 This is a schematic diagram of the optical signal triggering device in Embodiment 3 of this utility model.

[0028] Figure 11This is a schematic diagram illustrating the principle of the optical signal within the optical channel in Embodiment 3 of this utility model.

[0029] Figure 12 This is a schematic diagram of the high and low reflective surfaces of this utility model.

[0030] Figure 13 This is a schematic diagram of the circuit structure of the light source of this utility model.

[0031] Figure 14 This is a schematic diagram of the circuit structure of the optical signal receiving mechanism and control unit of this utility model.

[0032] Explanation of reference numerals in the attached drawings: 1. Keyboard body; 2. Key; 3. Optical channel; 4. Key socket; 5. Key switch of the key socket; 6. Fixed shelf; 7. Optical signal emitting mechanism; 8. Optical signal receiving mechanism; 9. Light blocking component; 10. Keycap; 11. Cavity; 12. Key switch of the keycap; 13. Switch connecting groove; 14. Figure-eight shaped reflective surface; 15. Linear reflective surface; 151. First reflective surface; 152. Second reflective surface. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1: The optical signal transmitting mechanism and the optical signal receiving mechanism are respectively located at both ends of the optical channel.

[0035] like Figures 1-2 As shown, a light signal keypad device includes a keyboard body 1 and keys disposed on the keyboard body 1. The key shafts have no metal contacts and only perform the functions of vertical downward pressing and springing back to reset. It also includes a light signal emitting mechanism 7, a light signal receiving mechanism 8, and a light channel 3 respectively disposed on the keyboard body 1. Each light channel is respectively provided with at least one set of light signal emitting mechanism 7 and light signal receiving mechanism 8. Each key is provided with two light channels 3, and multiple keys are provided on each light channel 3. Each key is provided with a light signal trigger corresponding to its two light channels 3.

[0036] An optical signal trigger is a device used to trigger changes in the optical signal within an optical channel. In other words, it is a device that alters the information transmitted between the optical signal transmitting mechanism and the optical signal receiving mechanism. Examples include blocking devices that obstruct the transmission of optical signals and filters that filter certain wavelengths of the optical signal.

[0037] Taking a light signal blocking device as an example, a light signal emitting mechanism is set at one end of the light channel and a light signal receiving mechanism is set at the other end. In normal use, the light channel 3 is unobstructed, and the light signal receiving mechanism 8 corresponding to each light channel 3 can receive the light signal emitted by the light signal emitting mechanism 7. When a button is pressed, the light signals emitted by the light signal emitting mechanisms 7 of the two light channels 3 corresponding to that button are blocked, preventing the light signal receiving mechanisms 8 of the two light channels 3 corresponding to that button from receiving the light signal. This uniquely identifies that a button 2 has been pressed, thus recognizing the trigger information of that button. In practice, since each button corresponds to two light channels 3, the light path of each button forms a light array. The button 2 corresponding to each button is a point in the light array. By pre-storing a table of correspondence between the light array and the array points and the buttons, the trigger information of button 2 can be quickly identified based on changes in the received light signal. This table lookup method is a conventional method and will not be elaborated further.

[0038] Similarly, when the light signal trigger is a filter, the light signal receiving mechanism can receive the light signal when no button is pressed, but when a button is pressed, the light signal in the light channel is filtered out. For example, the green light band in the red-green light signal is filtered out, and the light signal receiving mechanism only receives the red light band signal, thereby identifying and judging the specific key position change. The principle is similar to that of the blocking component, so it will not be elaborated further.

[0039] Specifically, the light signal emitting mechanism 7 is a light-emitting diode (LED), and the light signal receiving mechanism 8 is a light receiving tube. The light signal emitted by the light signal emitting mechanism 7 is laser light; in other embodiments, it can also be light of other spectra such as infrared light. The keyboard body 1 also includes an MCU controller and a photoelectric conversion circuit corresponding to the light signal receiving mechanism 8. The MCU controller controls the LED to connect to a power source and emit light continuously under controlled conditions, or to emit light alternately or flash at a certain frequency (controlled by PWM signals, a common control method). The light receiving tube is connected to the MCU controller through the photoelectric conversion circuit, thereby converting the received light signal into a level signal and sending it to the MCU controller. The MCU controller can quickly obtain the key 2 trigger information by looking up a table based on the changes in the received light signal. Figure 13 and Figure 14As shown, the photoelectric conversion circuit uses a common photoelectric signal conversion circuit. The MCU controller is an STM32F103C8T6, and the photosensitive receiver is a small-angle infrared pair, specifically an Everlight IRPT26-21C series ball-head 1206 surface-mount transmitter-receiver tube. The MCU controller U1A controls the switching of transistors Q2 and Q3 by outputting high and low levels, thereby controlling the LED's connection to the power supply and ultimately 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 receivers RECV1 and / or RECV2 is very small, and the pins of the MCU controller U1A receive a high level from the AD0 and / or AD1 terminals, indicating that a button has been pressed. When there is a light signal, the reverse current of the photosensitive receiver is larger, and the pins of the MCU controller U1A receive a low level from the AD0 and / or AD1 terminals, indicating that no button has been pressed. To prevent interference between the various light source channels and the receiving channels, the groove width or narrow groove entrance / exit can be set according to the actual situation to limit the light emission angle and the light reception angle. In this embodiment, a fixing plate 6 is provided on the keyboard body 1, such as... Figure 3 and Figure 4 As shown, the optical signal transmitting mechanism 7 and the optical signal receiving mechanism 8 are respectively set on the fixed plate 6, which facilitates the overall layout and installation.

[0040] In this embodiment, the light channel 3 is a groove on the keyboard body 1, the light-emitting diode is located at one end of the groove, and the light signal receiving mechanism 8 is located at the other end of the groove. The intersection of the two grooves is the key position 2. In this embodiment, the light signal trigger is a blocking or light-blocking component 9 located at the intersection of the two light channels 3. The light-blocking component 9 is an opaque device, and its shape corresponds to the shape of the intersection of the two grooves. The light-blocking component 9 is located at the bottom of the key shaft. Under normal conditions, the light-blocking component 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 component 9 into the intersection of the two grooves, thereby blocking the light signal. At this time, the corresponding light signal receiving mechanism 8 cannot receive a valid light signal.

[0041] In the prior art, a key generally includes a keycap, a key switch, and a key socket 4. The key switch 12 at the bottom of the keycap is mounted on top of the key switch 5 in the key socket 4 via a shaft connecting groove 13. Figure 6 As shown, the key shaft 5 is movably mounted on the key base 4. The key base 4 contains a spring or other reset element to allow the key shaft 5 to move vertically up and down and reset. In the above embodiment, the key structure uses an existing structure, the only difference being the removal of the metal contacts at the bottom of the key shaft 5, and the installation of a light-blocking element 9 at the bottom of the key shaft 5 in the key base 4. Figure 5 As shown. In other embodiments, the optical signal trigger can also be disposed on the keycap, such as... Figure 7As shown, the keycap 10 has a cavity 11 for light transmission. The height of the fixed shelf 6 and the light channel 3 correspond to the cavity of the keycap 10. In the normal non-pressed state, the light channel 3 is connected through the light-transmitting cavity 11 on the keycap 10, and the light signal receiving mechanism 8 receives the light signal. When the key is pressed, the top thickness of 10 blocks the light signal of the light channel 3, and the light signal receiving mechanism 8 cannot receive the light signal.

[0042] In reality, for a full keyboard (104 keys), the key layout of the numeric keypad area is a horizontal and vertical structure. Therefore, the corresponding optical channels can be set for each row and column of keys according to their positions. For the main key area outside the numeric keypad area, there are a total of 6 rows and 14 columns. Most keys are arranged in a regular, slanted column layout. The column positions of some keys at the edge of the letter area are irregular due to irregularities in key size and spacing. For example, the first row (Esc and F keys) has multiple empty spaces separating them; the leftmost and rightmost Shift / Backspace keys in the letter area; and the space bar in the bottom row have irregular or large key sizes. However, even the largest space bar only corresponds to one trigger key. Therefore, in this embodiment, the letter area is appropriately adjusted so that the columns of the 6 rows and 14 columns of keys in the letter area are all regularly slanted. Figures 1-2 The diagrams are for illustrative purposes only. In practice, the keycap width or position of some keys, such as the keys on either side of the spacebar, can be adjusted appropriately to keep the spacebar keycap the size we are accustomed to. However, the keycaps of the offset keys should also remain in their regular column positions.

[0043] Example 2: The optical signal transmitting mechanism and the optical signal receiving mechanism are both located at the same end of the optical channel.

[0044] The difference between this embodiment and Embodiment 1 is that the position of the optical signal receiving mechanism and the optical signal trigger are different.

[0045] In this embodiment, the optical channel is a groove on the keyboard body, with a light signal emitting mechanism and a light signal receiving mechanism arranged side by side at the same end of the groove; meanwhile, the light signal trigger is a light reflector located at the intersection of the two optical channels. That is, when no key is pressed, the light emitted by the light signal emitting mechanism propagates to the other end of the optical channel, so the light signal receiving mechanism cannot receive the light signal; when a key is pressed, the light emitted by the light signal emitting mechanism at one end of the optical channel is reflected back to the same end of the optical channel, so the light signal receiving mechanism receives the light signal.

[0046] Specifically, the light reflector is provided with a figure-eight shaped reflective surface 14, that is, two reflective surfaces, such as... Figure 8As shown, since each key corresponds to two optical channels, each reflective surface of the figure-eight-shaped reflective surface corresponds to one optical channel, meaning each key has a planar reflective surface for each of its optical channels. Figure 9 As shown, for a certain button, its two corresponding optical channels are optical channel A and optical channel B. The light emitted by the light signal emitting mechanism of optical channel A is reflected by the planar reflective surface, and the reflected light is received and identified by the light signal receiving mechanism at the same end of optical channel A. Figure 9 (As shown by the two red arrows in the middle); simultaneously, the light emitted by the light signal emitting mechanism of light channel B, after being reflected by the planar reflective surface, is received and identified by the light signal receiving mechanism at the same end of light channel B. Figure 9 (As indicated by the two blue arrows in the middle).

[0047] Therefore, when a button is pressed, the light signal trigger changes the direction of the light signal, which in turn changes the received signal of the light signal receiving mechanism. The two intersecting light channels work together to locate and identify the position of the button, thereby identifying the target button press.

[0048] Example 3: The optical signal transmitting mechanism and the optical signal receiving mechanism are both located at the same end of the optical channel.

[0049] The difference between this embodiment and embodiment 2 is that the light reflector on the light signal trigger is a linear reflective surface.

[0050] In this embodiment, the optical channel is a groove on the keyboard body, with a light signal emitting mechanism and a light signal receiving mechanism arranged horizontally side by side at the same end of the groove. Simultaneously, the light signal trigger is a light reflector located at the intersection of the two optical channels. That is, when no key is pressed, the light emitted by the light signal emitting mechanism propagates to the other end of the optical channel, so the light signal receiving mechanism cannot receive the light signal; when a key is pressed, the light emitted by the light signal emitting mechanism at one end of the optical channel is reflected to the other end of the optical channel, thus the light signal receiving mechanism receives the light signal.

[0051] Specifically, the light reflector is provided with a line-shaped reflective surface 15, such as... Figure 10 As shown, since each key corresponds to two optical channels, the two optical channels are symmetrically arranged to correspond to the linear reflective surface. The symmetrical plane is the perpendicular plane of the linear reflective surface. Figure 11 As shown, for a certain button, its two corresponding optical channels are optical channel A and optical channel B. The light emitted by the optical signal emitting mechanism of optical channel A is reflected by the I-shaped reflective surface 15, and the reflected light is received and identified by the optical signal receiving mechanism at one end of optical channel B. Figure 11(As shown by the two red arrows in the middle); simultaneously, the light emitted by the light signal emitting mechanism of light channel B, after being reflected by the I-shaped reflective surface 15, is received and identified by the light signal receiving mechanism at one end of light channel A. Figure 11 (As indicated by the two blue arrows in the middle).

[0052] Therefore, when a button is pressed, the light signal trigger changes the direction of the light signal, which in turn changes the received signal of the light signal receiving mechanism. The two intersecting light channels work together to locate and identify the position of the button, thereby identifying the target button press.

[0053] Example 4: Key Depth / Speed ​​Recognition

[0054] The difference between this embodiment and embodiments 1-3 is that two optical signal transmitting mechanisms are arranged vertically at intervals, and two corresponding optical signal receiving mechanisms are also arranged vertically at intervals. That is, there are two sets of optical signal transmitting mechanisms and two sets of optical signal receiving mechanisms (in other embodiments, multiple sets can also be arranged), with different heights. Therefore, when the optical signal trigger activates the optical signal, triggering the uppermost set of optical signal transmitting and receiving mechanisms identifies the key position. After triggering the first set, triggering the lowermost set triggers the second set, triggering the function corresponding to the key depth. In reality, since the relative positions of the two sets of optical signal transmitting and receiving mechanisms are fixed, the key press speed can also be calculated based on the trigger time interval between the two sets.

[0055] Example 5: Key Depth / Speed ​​Recognition

[0056] The difference between this embodiment and Embodiment 1 is that the optical signal trigger is a dual-layer filter element positioned at the intersection of the two optical channels. Specifically, in this embodiment, the filter element includes a first filter layer and a second filter layer, with the second filter layer positioned below the first filter layer. The filtering ranges of the first and second filter layers are different. Therefore, when the second filter layer triggers the optical signal transmitting and receiving mechanisms, the button position can be identified. Furthermore, when the first filter layer triggers the optical signal transmitting and receiving mechanisms, the function corresponding to the button depth can be triggered. In practice, since the relative positions of the two filter layers are fixed, the button press speed can also be calculated based on the trigger time interval between the two filter layers triggering the optical signal transmitting and receiving mechanisms respectively.

[0057] In this embodiment, the light emitted by the optical signal emitting mechanism contains multiple wavelengths, which are selected according to actual needs. In practice, a shielding layer can also be provided between the first and second filter layers to increase the relative distance between the two filter layers and improve the recognition effect.

[0058] Example 6: Key Depth / Speed ​​Recognition

[0059] The difference between this embodiment and embodiments 1-3 is that each optical channel has two sets of optical signal transmitting and receiving mechanisms. The heights of the two sets of optical signal transmitting and receiving mechanisms are on the same horizontal plane. The signal triggering elements include a first triggering element and a second triggering element, with the height of the first triggering element being greater than that of the second triggering element. The first triggering element corresponds to one set of optical signal transmitting and receiving mechanisms, and the second triggering element corresponds to the other set of optical signal transmitting and receiving mechanisms. Taking a linear reflective surface as an example, such as... Figure 12 As shown, there are two first reflective surfaces 151 and second reflective surfaces 152 with different heights on the same reflective surface. Each button corresponds to two optical channels, and each optical channel has two sets of optical signal transceivers. Therefore, within each optical channel, one set of optical signal transceivers is set to the first reflective surface 151, and the other set is set to the second reflective surface 152. When the button is pressed, one set of optical signal transceivers is first triggered by reflection from the first reflective surface 151, and the other set is subsequently triggered by reflection from the second reflective surface 152. Based on the trigger time difference between the two sets of optical signals, the button depth information and button speed information can be obtained. The principle of the light-shielding component and the light-filtering component is similar and will not be described in detail.

[0060] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A light signal keypad device, comprising a keyboard body and keys disposed on the keyboard body, characterized in that: It also includes a light signal emitting mechanism, a light signal receiving mechanism, and a light channel respectively set on the keyboard body. Each light channel is respectively set with at least one set of light signal emitting mechanism and light signal receiving mechanism. Each key is respectively set with two light channels, and multiple keys are respectively set on each light channel. Each key is respectively set with a light signal trigger for its two configured light channels.

2. The optical signal keypad device according to claim 1, characterized in that: The light signal emitting mechanism is a light-emitting diode, and the light signal receiving mechanism is a light-receiving tube; the keyboard body also has an MCU controller and a photoelectric conversion circuit. 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 keypad device according to claim 1, characterized in that: The optical channel is a groove on the keyboard body, with a light signal emitting mechanism at one end of the groove and a corresponding light signal receiving mechanism at the other end; the optical signal trigger is a light blocking or filtering component set at the intersection of the two optical channels.

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

5. The optical signal keypad device according to claim 1, characterized in that: The optical channel is a groove on the keyboard body, and a light signal emitting mechanism and a light signal receiving mechanism are arranged side by side on the same end of the groove; the light signal trigger is a light reflector arranged at the intersection of the two optical channels.

6. The optical signal keypad device according to claim 5, characterized in that: The light reflector is provided with two figure-eight shaped reflective surfaces. The light emitted by the light signal emitting mechanism of one light channel is reflected by one of the reflective surfaces of the figure-eight shaped reflective surfaces and then reflected through the same light channel to the light signal receiving mechanism of that light channel.

7. The optical signal keypad device according to claim 5, characterized in that: The light reflector is provided with a line-shaped reflective surface. The light emitted by the light signal emitting mechanism of one light channel is reflected by the line-shaped reflective surface and then reflected by another light channel to the light signal receiving mechanism of another light channel.

8. The optical signal keypad device according to claim 6 or 7, characterized in that: Each optical channel has two sets of optical signal transmitting mechanisms and optical signal receiving mechanisms arranged at intervals on one end.

9. The optical signal keypad device according to claim 3 or 5, characterized in that: Each optical channel has two sets of optical signal transmitting and receiving mechanisms. 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 is set for one set of optical signal transmitting and receiving mechanisms, and the second triggering component is set for another set of optical signal transmitting and receiving mechanisms.

10. The optical signal keypad device according to claim 1, characterized in that: The keyboard body has a fixed shelf, and the optical signal transmitting mechanism and the optical signal receiving mechanism are respectively set on the fixed shelf.

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