CN111799119B - Optical switch key - Google Patents

Abstract

The invention discloses an optical switch key, which comprises a shell with a deformable part, a movable shaft movably arranged in the shell, an elastic piece arranged in the shell and a switch module comprising a circuit board, an optical transmitter and an optical receiver. The movable shaft can be selectively positioned at an unpressed position and a pressed position; the optical transmitter transmits an optical signal, and the optical signal reaches the optical receiver along the optical transmission path; the deformable part extends inwards from the wall surface of the shell, the deformable part is positioned at the side of the interfered path of the light transmission path, and the long axis of the deformable part is not perpendicular to the interfered path of the light transmission path; when the movable shaft moves from the non-pressing position to the pressing position in response to the pressing force, the movable shaft moves along the movement path to push the deformable part to locally move laterally, so that the optical signal received by the optical receiver is changed to trigger the switch module to generate the trigger signal. The invention can achieve the rapid and accurate conversion of the pressing signal.

Description

Optical switch key

Technical Field

The present invention relates to an optical switch key, and more particularly, to an optical switch key that actuates a switch in response to a change in an optical signal receiving state caused by a pressing operation.

Background

Membrane switch keys and mechanical keys are commonly used key types in conventional keyboards. The main difference between the membrane switch key and the mechanical key is that the circuit structure for generating signals is different. Generally, a membrane switch key is a switch component using a membrane circuit layer as a signal generation, when a keycap is pressed to trigger the membrane circuit layer, an upper circuit layer is deformed to make a switch contact of the upper circuit layer contact a corresponding switch contact of a lower circuit layer, and then the membrane switch is turned on to generate a signal. However, the thin film circuit layer is easily damaged by frequent use or improper force application, and is difficult to maintain, and when a user presses the key cap to trigger the thin film circuit layer, clear step feedback is lacked, so that the pressing hand feeling is not good, and the manipulation feeling of the user cannot be satisfied.

The mechanical key is a switch component which uses the conduction of the metal sheet and the metal contact as the signal generation. However, the metal sheet and the metal contact are easily abraded by impact to affect the service life of the key, and the metal sheet or the metal contact is corroded by moisture to cause bad conduction and affect the stability of the key. Furthermore, the conventional mechanical key is not suitable for being applied to a portable electronic device with a high requirement for thin-type, such as a notebook computer, because the structure is complicated and the volume is large.

Disclosure of Invention

The invention aims to provide an optical switch key, which utilizes a switch module consisting of an optical transmitter and an optical receiver, and provides a quick and accurate triggering function by changing the receiving state of an optical signal along with the pressing stroke through components in the key.

Another objective of the present invention is to provide an optical switch key, which integrates a low-profile key structure, and selectively changes the receiving intensity of optical signals by using a laterally movable member or a movable portion, so as to reduce the space requirement in the vertical direction, and is suitable for being applied to a portable electronic device.

In order to achieve the above object, the present invention provides an optical switch key, which includes a housing, a movable shaft, an elastic member and a switch module, wherein the housing has a deformable portion; the movable shaft is movably arranged in the shell and can move up and down along a movement path to a non-pressed position and a pressed position in response to the pressing force; the elastic piece is arranged in the shell and coupled with the movable shaft, and when the pressing force is removed, the elastic piece enables the movable shaft to return to the non-pressing position; the switch module comprises a circuit board, a light transmitter and a light receiver, wherein the light transmitter and the light receiver are electrically connected with the circuit board, the light transmitter transmits a light signal, and the light signal reaches the light receiver along a light transmission path; when the movable shaft is located at the non-pressed position, the deformable part and the optical transmission path have a first spatial relationship, and the optical signal received by the optical receiver has a first intensity; when the movable shaft moves from the non-pressing position to the pressing position in response to the pressing force, the movable shaft moves along the movement path to compress the elastic member and push the deformable portion to move, so that the deformable portion and the optical transmission path do not have the first spatial relationship any more, the optical signal received by the optical receiver has a second intensity, and the second intensity is different from the first intensity to trigger the switch module to generate a trigger signal.

As an optional technical solution, when the movable shaft is located at the non-pressed position, the portion of the deformable portion entering the optical transmission path is small, the amount of the optical signal blocked by the deformable portion is low, and the optical signal received by the optical receiver is the first intensity; when the movable shaft is located at the pressing position, the deformable portion moves laterally away from the motion path, the deformable portion enters the light transmission path in a large number of parts, the deformable portion blocks the light signal quantity to be high, and the light signal received by the light receiver is of the second intensity, so that the second intensity is smaller than the first intensity.

As an optional technical solution, the movable shaft has an acting portion protruding along the movement path and corresponding to the deformable portion, and when the movable shaft is located at the non-pressed position, the acting portion and the deformable portion at least partially overlap in a direction parallel to the movement path; when the movable shaft moves along the motion path to push the deformable part to move laterally, the acting part is at least partially contacted with the deformable part in a direction perpendicular to the motion path.

As an alternative solution, the acting portion has a first inclined surface, and the deformable portion has a second inclined surface, the first inclined surface corresponds to the second inclined surface, and when the movable shaft moves along the movement path, the first inclined surface moves relative to the second inclined surface, so that the deformable portion moves laterally.

As an optional technical solution, the circuit board further has an avoidance space, and when the movable shaft is located at the pressing position, the end of the acting portion exceeds the deformable portion and enters the avoidance space.

As an optional technical solution, the housing is formed by combining an upper housing and a lower housing, the upper housing has a through hole and an upper engaging portion, the movable shaft is movably inserted into the through hole to position the elastic member, and the lower housing has a lower engaging portion for engaging with the upper engaging portion, so that the upper housing is connected with the lower housing; the deformable part is arranged on the lower shell; alternatively, the deformable portion is provided to the upper case.

As an optional technical solution, the housing further has a grating portion, the grating portion has a grating hole and is located between the light emitter and the light receiver, the deformable portion has a horizontal extension axis, and when the movable axis is located at the non-pressing position, the horizontal extension axis does not pass through the grating hole; the horizontally extending shaft passes through the grating aperture when the deformable portion is moved laterally away from the motion path.

As an optional technical solution, the circuit board further has a positioning hole, the lower housing has a positioning column, and the positioning column is inserted into the positioning hole to position the housing on the circuit board.

As an optional technical solution, the optical switch key further includes a light guide column and a backlight source, wherein the light guide column is disposed in the housing corresponding to the elastic member, and the backlight source is electrically connected to the circuit board corresponding to the light guide column to provide light to be emitted toward the movable shaft.

In addition, the present invention also provides another optical switch key, comprising: the switch comprises a shell, a movable shaft, an elastic piece, a switch module and a shielding piece. The movable shaft is movably arranged on the shell and can move up and down along a movement path to a non-pressed position and a pressed position in response to the pressing force; the elastic piece is arranged in the shell and coupled with the movable shaft, and when the pressing force is removed, the elastic piece enables the movable shaft to return to the non-pressing position; the switch module comprises a circuit board, an optical transmitter and an optical receiver, wherein the optical transmitter and the optical receiver are electrically connected with the circuit board, the optical transmitter transmits an optical signal, and the optical signal reaches the optical receiver along an optical transmission path; the shielding piece is arranged on the shell, when the movable shaft is positioned at the non-pressing position, the shielding piece and the optical transmission path have a first spatial relationship, and the optical signal received by the optical receiver has a first intensity; when the movable shaft moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft moves along the movement path to compress the elastic member and drive the shielding member to move, so that the shielding member and the optical transmission path do not have the first spatial relationship any more, the optical signal received by the optical receiver has a second intensity, and the second intensity is different from the first intensity to trigger the switch module to generate a trigger signal.

As an optional technical solution, when the movable shaft is located at the non-pressed position, the part of the shielding member entering the optical transmission path is small, the shielding member blocks the optical signal with a low amount, and the optical signal received by the optical receiver has the first intensity; when the movable shaft is located at the pressing position, the shielding piece moves laterally away from the moving path, the shielding piece enters the light transmission path in a large amount, the shielding piece blocks the light signal quantity, and the light signal received by the light receiver has the second intensity, so that the second intensity is smaller than the first intensity.

As an optional technical solution, when the movable shaft is located at the non-pressed position, the shielding member is located in the optical transmission path, the shielding member blocks the optical signal, and the optical signal received by the optical receiver is the first intensity; when the movable shaft is located at the pressing position, the shielding piece moves laterally away from the optical transmission path, and the optical signal received by the optical receiver has the second intensity, so that the second intensity is greater than the first intensity.

As an optional technical solution, the housing is formed by combining an upper housing and a lower housing, the upper housing has a through hole and an upper engaging portion, the movable shaft is movably inserted into the through hole to position the elastic member, the lower housing has a lower engaging portion for engaging with the upper engaging portion, so that the upper housing is connected to the lower housing, the housing further has a grating portion, the grating portion has a grating hole and the grating portion is located between the optical transmitter and the optical receiver, the shielding member has a shielding portion that selectively shields the grating hole relative to the optical transmitting portion corresponding to the movement of the movable shaft.

In addition, the present invention further provides another optical switch key, including: the key cap, supporting mechanism, return mechanism and switch module. The supporting mechanism is arranged below the keycap and supports the keycap to move up and down; the restoring mechanism is arranged below the keycap to provide restoring force so that the keycap restores to the position before pressing after pressing, the restoring mechanism comprises a shell and an elastic piece, the elastic piece is arranged in the shell, and the shell is provided with a deformable part; the switch module comprises a circuit board, a light emitter and a light receiver, wherein the light emitter and the light receiver are electrically connected with the circuit board, the light emitter emits a light signal corresponding to the light receiver, and when the keycap is not pressed, the light signal received by the light receiver has first intensity; when the keycap is pressed, the keycap drives the supporting mechanism to move, so that the elastic piece is compressed and the supporting mechanism pushes the deformable part to move to change the optical signal received by the optical receiver into a second intensity, wherein the second intensity is different from the first intensity, and the switch module is triggered to generate a trigger signal.

As an optional technical solution, the supporting mechanism includes an inner bracket and an outer bracket, the inner bracket is pivoted to the inner side of the outer bracket to form a scissor-type supporting mechanism, and the supporting mechanism has a protrusion extending and protruding from the inner bracket toward the inner side of the inner bracket.

As an optional technical solution, when the keycap is pressed to drive the supporting mechanism to move, the protrusion pushes the deformable portion to move so as to at least partially block the optical signal, so that the second intensity is smaller than the first intensity.

As an optional technical solution, when the key cap is not pressed, the protruding part and the deformable part at least partially overlap in a direction parallel to a moving direction of the key cap; when the keycap is pressed, the protruding part pushes the deformable part to move laterally, and the protruding part and the deformable part are at least partially contacted in the moving direction perpendicular to the keycap.

As an optional technical solution, the protruding portion has a first inclined surface, and the deformable portion has a second inclined surface, the first inclined surface corresponds to the second inclined surface, and when the keycap drives the supporting mechanism to move, the first inclined surface moves relative to the second inclined surface, so that the deformable portion moves laterally.

As an optional technical solution, the housing is formed by combining an upper housing and a lower housing, the upper housing has an upper engaging portion, and the lower housing has a lower engaging portion, the lower engaging portion is used for engaging with the upper engaging portion, so that the upper housing is connected with the lower housing; the deformable part is arranged on the lower shell; alternatively, the deformable portion is provided to the upper case.

As an optional technical solution, the casing further has a grating portion, the grating portion is located between the light emitter and the light receiver, and when the key cap is pressed, the supporting mechanism pushes the deformable portion to move so as to change the relative position of the deformable portion and the grating portion.

Compared with the prior art, the optical switch key provided by the invention uses the optical transmitter and the optical receiver as the switch signals, the receiving state of the optical signals is changed along with the pressing stroke through any suitable component in the key, so that the fast and accurate conversion of the pressing signals is achieved, and the optical switch key can be applied to various key structures to be suitable for portable electronic devices. Moreover, the optical switch key of the invention can be provided with a grating structure to avoid the interference of external light and improve the operation correctness, and can control the trigger position when being pressed and reduce the trigger point error. In addition, the optical switch key of the invention utilizes the shielding piece (or the deformable part) which can be laterally displaced to selectively change the receiving intensity of the optical signal so as to reduce the space requirement in the vertical direction.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1A and 1B are schematic exploded views of an optical switch key according to a first embodiment of the invention at different viewing angles.

Fig. 1C is an assembled top view of the optical switch key of fig. 1A without showing the upper housing.

FIG. 1D is a schematic cross-sectional view of the upper shell taken along line AA in FIG. 1C.

Fig. 2A and 2B are schematic views of a lower housing according to an embodiment of the invention at different viewing angles.

Fig. 2C is a schematic diagram of the relative positions of the lower housing, the optical transmitter and the optical receiver in fig. 2B.

Fig. 3A to 3D are schematic cross-sectional views of the optical switch key including the upper housing at different stroke positions along a tangent line BB of fig. 1C.

Fig. 4A and 4B are schematic exploded views of an optical switch button according to a second embodiment of the present invention at different viewing angles.

Fig. 4C is a schematic cross-sectional view of an optical switch button according to a second embodiment of the present invention.

Fig. 5A to 5D are schematic cross-sectional views of the optical switch key of fig. 4A at different stroke positions.

Fig. 6A and 6B are schematic exploded views of an optical switch key according to a third embodiment of the invention from different viewing angles.

Fig. 6C is an assembled top view of the optical switch key of fig. 6A without showing the upper housing.

Fig. 6D is a partially-hollowed perspective view of the optical switch key of fig. 6A without showing the upper housing.

Fig. 7 is an assembly diagram of the lower housing and the shielding member according to an embodiment of the invention.

Fig. 8A and 8B are partial top views of the optical switch key at the non-pressed position and the pressed position, respectively.

Fig. 9A and 9B are partial top views of an optical switch button at an un-pressed position and a pressed position according to a fourth embodiment of the present invention.

Fig. 10 is an exploded view of an optical switch button according to a fifth embodiment of the present invention.

Fig. 11A and 11B are schematic diagrams of an upper housing and a lower housing of the optical switch key of fig. 10, respectively.

Fig. 12A and 12B are a top view and a perspective view of the optical switch key of fig. 10 without showing a key cap.

Fig. 13 is an exploded view of an optical switch button according to a sixth embodiment of the present invention.

Fig. 14A and 14B are schematic views of the upper housing of the optical switch key of fig. 13 at different viewing angles.

Fig. 15A and 15B are a top view and a perspective view of the optical switch key of fig. 13 without showing a key cap.

Fig. 16A and 16B are schematic exploded views of an optical switch button according to a seventh embodiment of the invention at different viewing angles.

Fig. 16C is an assembled top view of the optical switch key of fig. 16A without showing the upper housing.

Fig. 16D is a schematic cross-sectional view including the upper case along a tangent line CC of fig. 16C.

Fig. 17A and 17B are schematic views of a lower housing at different viewing angles according to an embodiment of the invention.

Fig. 18A and 18B are schematic cross-sectional views of the optical switch key including the upper housing at the non-pressed position and the pressed position along the cutting line DD in fig. 16C.

Fig. 19A and 19B are schematic exploded views of an optical switch button according to an eighth embodiment of the invention at different viewing angles.

Fig. 19C is an assembled top view of the optical switch button of fig. 19A without showing the upper housing.

Fig. 19D is a schematic cross-sectional view taken along line EE of fig. 19C.

Fig. 20A and 20B are schematic views of an upper housing according to an embodiment of the invention from different viewing angles.

Fig. 21A and 21B are schematic cross-sectional views of the optical switch key including the upper housing at the non-pressed position and the pressed position along a tangent line FF of fig. 19C.

Fig. 22 is an exploded view of the optical switch button according to the ninth embodiment of the present invention.

Fig. 23 is a schematic view of a lower case of the optical switch key of fig. 22.

Fig. 24A and 24B are a top view and a perspective view of the optical switch key of fig. 22 without showing a key cap.

Fig. 25 is an exploded view of an optical switch button according to a tenth embodiment of the present invention.

Fig. 26 is a schematic view of an upper housing of the optical switch key of fig. 25.

Fig. 27A and 27B are a top view and a perspective view of the optical switch key of fig. 25 without showing a key cap.

Detailed Description

The present invention provides an optical switch key, which can be applied to any pressing type input device (such as a keyboard), or integrated into any suitable electronic device (such as a key of a portable electronic device or a keyboard of a notebook computer) to provide a quick and accurate triggering function, and is suitable for various key structure designs. The structure and operation of each component of the optical switch key according to the embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 1A to 5D are schematic diagrams of a first embodiment of the present invention, wherein fig. 1A and 1B are respectively exploded schematic diagrams of an optical switch key according to the first embodiment of the present invention at different viewing angles, fig. 1C is an assembled top view of the optical switch key of fig. 1A without showing an upper housing, and fig. 1D is a cross-sectional schematic diagram including the upper housing along a tangent line AA of fig. 1C. As shown in fig. 1A to fig. 1D, the optical switch key 10 according to the first embodiment of the present invention includes a housing 100, a movable shaft 130, an elastic member 140 and a switch module 150. The housing 100 has a deformable portion 111. The movable shaft 130 is movably disposed in the housing 100, and in response to the pressing force, the movable shaft 130 can move up and down along the moving path to the non-pressed position and the pressed position. The elastic member 140 is disposed in the housing 100, and the elastic member 140 is coupled to the movable shaft 130, so that when the pressing force is removed, the elastic member 140 returns the movable shaft 130 to the non-pressed position. The switch module 150 includes a circuit board 151, an optical transmitter 152, and an optical receiver 153. The optical transmitter 152 and the optical receiver 153 are electrically connected to the circuit board 151, and the optical transmitter 152 transmits an optical signal to the optical receiver 153 along an optical transmission path. When the movable shaft 130 is located at the non-pressed position, the deformable portion 111 has a first spatial relationship with the optical transmission path, and the optical signal received by the optical receiver 153 has a first intensity. When the movable shaft 130 moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft 130 moves along the movement path to compress the elastic member 140 and push the deformable portion 111 to move, so that the deformable portion 111 and the optical transmission path do not have the first spatial relationship any more, and the optical signal received by the optical receiver 153 has a second intensity, and the second intensity is different from the first intensity, so as to trigger the switch module 150 to generate the trigger signal.

In addition, the optical switch key 10 may optionally include a backlight unit 160 for generating light to form a light-emitting key. For example, the backlight unit 160 includes a light guide post 161 and a backlight source 162, wherein the light guide post 161 is disposed in the casing 100 corresponding to the elastic member 140, and the backlight source 162 is electrically connected to the circuit board 151 corresponding to the light guide post 161 for providing light.

The housing 100 is preferably formed by combining an upper housing 120 and a lower housing 110 to form a receiving space therein for disposing other components (such as the elastic member 140, the light guide post 161, etc.) of the optical switch key 10. In this embodiment, the upper housing 120 has a through hole 121 and an upper engaging portion 122. The movable shaft 130 is movably inserted in the through hole 121 to position the elastic member 140. The lower housing 110 has a lower engaging portion 112, the lower engaging portion 112 is used for engaging with the upper engaging portion 122, so that the upper housing 120 is connected with the lower housing 110 to form the housing 100 having an accommodating space therein for accommodating the elastic element 140, the light guide column 161, and the like. For example, the upper engaging portion 122 is preferably a slot formed on two opposite sides of the upper housing portion 120, and the lower engaging portion 112 is a hook corresponding to the slot, but not limited thereto. According to practical applications, the upper engaging portion 122 may be a hook formed on the upper housing portion 120, and the lower engaging portion 112 is a slot corresponding to the hook.

Furthermore, the housing 100 can be positioned on a lower board (e.g., the circuit board 151 or a bottom board (not shown)) by, for example, fastening, locking, adhering, leaning, and the like. In this embodiment, the housing 100 is preferably disposed on the circuit board 151, but not limited thereto. In other embodiments, when the housing 100 is disposed on a bottom plate, the circuit board 151 may be selectively disposed above or below the bottom plate according to practical applications. In one embodiment, the housing 100 is preferably positioned on the circuit board 151 by a positioning mechanism. For example, the lower housing 110 may have positioning pillars 113, and the circuit board 151 may have insertion holes 154 corresponding to the positioning pillars 113, such that the housing 100 may be fixed to the circuit board 151 by inserting the positioning pillars 113 of the lower housing 110 into the insertion holes 154, but not limited thereto. In other embodiments, the positions of the positioning post and the insertion hole can be interchanged according to practical applications.

The through hole 121 of the upper housing 120 preferably has a shape corresponding to the top of the movable shaft 130, such that the movable shaft 130 can be movably disposed through the through hole 121 of the upper housing 120 from below the upper housing 120, and the top of the movable shaft 130 protrudes out of the through hole 121. The movable shaft 130 preferably has an acting portion 131, an actuating portion 132, a limiting portion 133 and an engaging portion 134. For example, the movable shaft 130 is preferably sleeve-shaped, the acting portion 131, the actuating portion 132 and the limiting portion 133 are preferably disposed along the periphery of the lower end of the movable shaft 130, and the engaging portion 134 is preferably disposed on the top of the movable shaft 130.

Specifically, the action portion 131 protrudes along a movement path (e.g., a path parallel to the Z-axis direction) and corresponds to the deformable portion 111. For example, the acting portion 131 may be a pillar or a bump extending downward along the Z-axis direction to correspond to the deformable portion 111 of the housing 100. In one embodiment, the acting portion 131 preferably has a first inclined surface 1311. In this embodiment, the first inclined surface 1311 is preferably formed at the free end (i.e., the lower end) of the acting portion 131 and is inclined inward along the moving path. For example, the first inclined surface 1311 preferably extends downward in the Z-axis direction and is inclined toward the inner side of the movable shaft 130. The actuating portion 132 is disposed corresponding to the extension arm 143 of the elastic member 140, and the actuating portion 132 is preferably in the form of a protrusion (e.g., an angular block) for interfering with the extension arm 143 of the elastic member 140 to provide a pressing feeling. The position-limiting portions 133 are preferably cylinders protruding radially from two sides of the movable shaft 130, such that the distance between the two cylinders is greater than the diameter of the through hole 121 of the upper housing 120, thereby preventing the movable shaft 130 from separating from the upper housing 120 when moving in the through hole 121 relative to the lower housing 110. The joint 134 may be, for example, a cross-shaped engaging column formed on the top of the movable shaft 130 for engaging with a key cap (not shown), but is not limited thereto. In other embodiments, the engaging portion 134 may have other forms (e.g., engaging holes, bumps) to engage or abut with the keycap.

In this embodiment, the elastic element 140 preferably includes a spring body 141, a positioning portion 142 and an extension arm 143, and the positioning portion 142 connects the spring body 141 and the extension arm 143. For example, the positioning portion 142 and the extension arm 143 are preferably formed by bending a rod extending from one end (e.g., a lower end) of the spring body 141, and the positioning portion 142 and the extension arm 143 serve as a touch-sensing elastic element of the optical switch button 10, but not limited thereto. In this embodiment, the positioning portion 142 preferably extends horizontally from one end of the spring body 141, and then bends upward substantially in the Z-axis direction, and the extension arm 143 bends and extends relative to the positioning portion 142. In this embodiment, the included angle between the extension arm 143 and the positioning portion 142 is preferably not greater than 120 degrees. In another embodiment, the elastic member 140 may be implemented as a spring structure having only the spring body 141 without the positioning portion 142 and the extension arm 143, and the optical switch 10 may further include a hand-feeling elastic member (e.g., a torsion spring) separated from the spring body 141 to provide a pressing hand feeling corresponding to the actuating portion 132 of the movable shaft 130. In another embodiment, the elastic member 140 may only have the spring body 141, and the optical switch button 10 may not additionally provide a hand-feeling elastic member, so the movable shaft 130 may not include the corresponding actuating portion 132. In addition, in this embodiment, the elastic member 140 is implemented in a spring type, but not limited thereto. In other embodiments, the elastic element 140 may be implemented as an elastic body and is located between the lower housing 110 and the movable shaft 130 to provide a restoring force after being pressed.

Referring to fig. 2A and 2B, the details of the structure of the lower housing 110 and the arrangement relationship of the components in the lower housing 110 will be described in detail. The lower case 110 further has a positioning part 114 corresponding to the elastic member 140, so that the spring body 141 can be positioned at the positioning part 114. For example, the positioning portion 114 is an annular wall extending from the bottom of the lower housing 110 to the upper housing 120, such that one end of the spring body 141 is sleeved on the annular wall, and the other end of the spring body 141 abuts against the bottom surface of the movable shaft 130, such that the top of the movable shaft 130 protrudes from the through hole 121 of the upper housing 120. Accordingly, when the key cap is pressed by the pressing force, the movable shaft 130 compresses the spring body 141 when the movable shaft 130 moves from the non-pressed position to the pressed position toward the lower housing 110. When the pressing force is released, the spring body 141 may provide an elastic restoring force such that the movable shaft 130 moves to an unpressed position in a direction away from the lower case 110. Furthermore, the lower housing 110 preferably further has a position-limiting portion 115 corresponding to the positioning portion 142 of the elastic member 140. The positioning portion 142 is positioned on the lower housing 110 by the limiting portion 115, and the extension arm 143 extends corresponding to the actuating portion 132. The position-limiting portion 115 preferably corresponds to an upper section of the positioning portion 142 (i.e., an upright portion adjacent to the extension arm 143) to limit the displacement of the positioning portion 142. Specifically, when the spring body 141 is sleeved on the positioning portion 114 of the lower housing 110, the positioning portion 142 of the elastic element 140 preferably extends horizontally to the position-limiting portion 115, so that the upright upper section of the positioning portion 142 is positioned by the position-limiting portion 115, and the extension arm 143 extends below the actuating portion 132 relative to the positioning portion 142. For example, the position-limiting portion 115 may be a groove formed on the wall of the lower housing 110, or a wall that can support the connection between the positioning portion 142 and the extension arm 143. In addition, the lower case 110 may optionally further have a striking part 116. When the movable shaft 130 moves toward the lower housing 110 in response to a pressing force, the actuating portion 132 moves downward along with the movable shaft 130 to generate a relative displacement with the extension arm 143, so that the user's finger first senses a large resistance, and then the extension arm 143 disengages from the pressing of the actuating portion 132, so that the user's finger senses a greatly reduced resistance, thereby providing a step difference feeling when the user presses the touch portion, and the extension arm 143 can generate a sound by rebounding and knocking the impact portion 116. When the pressing force is released, the elastic body 141 provides a restoring force to move the movable shaft 130 upward, so that the actuating portion 132 is moved upward, and the extension arm 143 slides downward relative to the actuating portion 132 to return to the original position.

In addition, the lower housing 110 preferably has an accommodating portion 1141 corresponding to the backlight unit 160. For example, the accommodating portion 1141 may be a space surrounded by an annular wall of the positioning portion 114 for accommodating the light guide pillar 161. That is, the light guide post 161 is disposed inside the positioning portion 114, and the spring body 141 is sleeved outside the positioning portion 114. Furthermore, the bottom of the lower housing 110 corresponding to the accommodating portion 1141 preferably forms an opening, and the light source 162 is correspondingly disposed below the light guide post 161 to emit light toward the light guide post 161. In this embodiment, the light source 161 is preferably a light emitting diode, but not limited thereto.

As shown in the drawing, in this embodiment, the deformable portion 111 is disposed at the lower housing 110 to correspond to the acting portion 131 of the movable shaft 130. Specifically, the deformable portion 111 is an elastic arm disposed on the lower housing 110, such that the deformable portion 111 can be displaced (or elastically deformed) in response to the movement of the acting portion 131, and further the spatial relationship (or relative position) of the deformable portion 111 with respect to the optical transmission path between the light emitting portion 152 and the light receiving portion 153 is changed, so as to trigger the switch unit 150 to generate the trigger signal. In this embodiment, the deformable portion 111 is preferably integrally formed with the lower housing 110. For example, the bottom of the lower housing 110 has an opening 117, and the deformable portion 111 extends from a wall adjacent to one side of the opening 117 toward an opposite side of the opening 117. In other words, the deformable portion 111 is preferably disposed in the opening 117, and one end of the deformable portion 111 is connected to the wall portion of the lower housing 110 defining the opening 117, and the other end of the deformable portion 111 opposite to the wall portion is a free end located in the opening 117. The deformable portion 111 is preferably substantially parallel to the bottom of the lower housing 110 and extends horizontally in the opening 117, such that the deformable portion 111 has a horizontally extending axis L. In other words, the horizontal extending axis L is preferably a long axis from the connecting end to the free end of the deformable portion 111. In this embodiment, the deformable portion 111 is preferably an L-shaped elastic arm including a connection portion 1112 and a shielding portion 1113, wherein a major axis of the L-shaped elastic arm is preferably parallel to the connection portion 1112 at the bottom of the lower housing 110, and a minor axis of the L-shaped extension arm is a shielding portion 1113 protruding from the free end of the deformable portion 111 toward the bottom of the lower housing 110. In other words, one end of the connection portion 1112 of the deformable portion 111 is connected to the lower case 110, and the other end of the connection portion 1112 is connected to the shielding portion 1113.

It should be noted that, in this embodiment, the shielding portion 1113 is illustrated as extending downward from the connecting portion 1112, but not limited thereto. In other embodiments, the shielding portion 1113 may extend upward from the connecting portion 1112 according to practical applications. In the embodiment, the connection portions 1112 are illustrated as connection arms linearly extending parallel to the bottom of the lower housing 110, but the invention is not limited thereto. In other embodiments, the connecting portion 1112 may be a rod or arm with any suitable shape as a support arm for the elastic deformation (or displacement) of the deformable portion 111. In addition, as shown in fig. 2C, the light emitter 152 and the light receiver 153 are preferably disposed on two opposite sides of the shielding portion 1113 of the deformable portion 111, and are preferably located below the connecting portion 1112, so that when the deformable portion 111 deforms and displaces, the light emitter 152 (or the light receiver 153) does not obstruct the lateral displacement of the connecting portion 1112 and the shielding portion 1113.

In this embodiment, the deformable portion 111 preferably has a second inclined surface 1111 to correspond to the first inclined surface 1311 of the acting portion 131, such that when the movable shaft 130 moves along the moving path, the first inclined surface 1311 moves relative to the second inclined surface 1111, so as to move the deformable portion 111 laterally. Specifically, the second inclined surface 1111 is preferably an inner side surface (i.e., a side surface facing the direction of the movable shaft 130) of the shielding portion 1113, and extends downward and is inclined outward in the Z-axis direction such that the second inclined surface 1111 corresponds to the first inclined surface 1311.

Further, the housing 100 preferably further has a grating portion 118. The grating portion 118 has a grating hole 1181 and the grating portion 118 is located between the optical emitter 152 and the optical receiver 153. Specifically, in this embodiment, the optical grating portion 118 is disposed on the lower housing 110, and the optical grating portion 118 is disposed corresponding to the optical emitter 152 or the optical receiver 153 to define a stroke for pressing the key cap to generate the trigger signal. That is, the grating portion 118 can be a grating structure having a grating hole 1181, and is preferably disposed between the optical emitter 152 and the optical receiver 153, and the grating portion 118 is adjacent to the emitting end of the optical emitter 152 or the receiving end of the optical receiver 153. The grating portion 118 can control the triggering position of the pressing by controlling the size and the corresponding position of the grating hole 1181, thereby reducing the triggering error. For example, the triggering error that may be generated when pressing is about the thickness of the optical transmitter 152 or the optical receiver 153, which can be reduced by the size of the corresponding control grating hole 1181 being smaller than the thickness of the optical transmitter 152 or the optical receiver 153. In an embodiment, the grating portion 118 of the lower housing 110 is disposed adjacent to the optical receiver 153, so that the optical signal is not easily interfered by external light at the receiving end, and the possibility of false triggering is effectively reduced, but not limited thereto. Depending on the application, the positions of the optical transmitter 152 and the optical receiver 153 can be interchanged to make the optical grating portion 118 adjacent to the optical transmitter 152, in accordance with the design of the circuit board 151. Furthermore, corresponding to the grating portion 118, the deformable portion 111 is located at one side of the grating portion 118, so that when the deformable portion 111 deforms and displaces relative to the lower housing 110 in response to the movement of the acting portion 131, the relative position with the grating hole 1181 is selectively changed, and the intensity of the optical signal received by the optical receiver 153 is further changed. For example, the width and length of the shielding portion 1113 of the deformable portion 111 are preferably greater than or equal to the width and length of the grating hole 1181, so that the shielding portion 1113 can selectively shield the grating hole 1181 when the deformable portion 111 is displaced in response to the movement of the action portion 131.

The light emitter 152 and the light receiver 153 are disposed on the circuit board 151 and electrically connected to the circuit board 151. Specifically, the circuit board 151 preferably has a switch circuit, and the optical transmitter 152 and the optical receiver 153 are electrically connected to the switch circuit of the circuit board 151, so that the optical transmitter 152 can transmit an optical signal to the optical receiver 153, and the trigger switch module 150 is triggered to generate a trigger signal when the intensity of the optical signal received by the optical receiver 153 changes. For example, the optical transmitter 152 can be any transmitter that can emit an optical signal with a suitable wavelength, and the optical signal emitted by the optical transmitter 152 can include electromagnetic waves, infrared rays, or visible light. The optical receiver 153 is any convenient receiver that can receive a corresponding optical signal. The optical transmitter 152 and the optical receiver 153 are preferably arranged linearly so that the optical transmission path is a straight path. The circuit board 151 preferably has an escape space 155, and the escape space 155 communicates with the opening 117. When the movable shaft 130 is located at the pressing position, the end of the acting portion 131 preferably enters the avoiding space 155, so as to improve the pressing stroke and increase the operation hand feeling. For example, the avoiding space 155 may be an avoiding groove (or an avoiding hole) formed on the circuit board 151, and the optical transmitter 152 and the optical receiver 153 are disposed on opposite sides of the avoiding groove.

In addition, the circuit board 151 preferably has a light source circuit for driving the backlight light source 162, corresponding to the arrangement of the backlight light source 162. The backlight source 162 may be disposed on the circuit board 151 and electrically connected to the light source circuit of the circuit board 151 to provide light to enter the light guide post 161 and then to be emitted from the key cap of the optical switch key 10. In one embodiment, the backlight source 162 is preferably a light emitting diode, and the wavelength of the light emitted by the backlight source 162 is preferably different from the wavelength of the light signal emitted by the light emitter 152, so as to reduce the interference, but not limited thereto.

Fig. 3A to 3D are cross-sectional views of the optical switch key 10 of fig. 1A taken along a tangent line BB of fig. 1C and including the upper housing 120 at different stroke positions, for example, fig. 3A, 3B, 3C and 3D are cross-sectional views of the optical switch key 10 at an un-pressed position, a contact position of the acting portion 131 and the deformable portion 111, a triggering position and a lowest position, respectively, for describing the operation of the optical switch key 10 of fig. 1A with reference to fig. 3A to 3D. As shown in fig. 3A, when the movable shaft 130 is located at the non-pressed position, the acting portion 131 preferably at least partially overlaps the deformable portion 111 in a direction parallel to the movement path. For example, when the movable shaft 130 is located at the non-pressed position, the acting portion 131 and the deformable portion 111 preferably at least partially overlap in the Z-axis direction, i.e., the perpendicular projection of the acting portion 131 and the deformable portion 111 on the lower housing 110 at least partially overlap. When the movable shaft 130 is located at the non-pressed position, the deformable portion 111 and the optical transmission path have a first spatial relationship, and the optical signal received by the optical receiver 153 has a first intensity. In this embodiment, when the movable shaft 130 is located at the non-pressed position, the portion of the deformable portion 111 entering the optical transmission path is small, the amount of the optical signal blocked by the deformable portion 111 is small, and the first intensity of the optical signal received by the optical receiver 153 is strong. For example, when the movable shaft 130 is located at the non-pressed position, the horizontal extending axis L of the deformable portion 111 preferably does not pass through the grating hole 1181, that is, the deformable portion 111 is preferably located at one side of a virtual connection line (i.e., a light transmission path) between the light emitter 152, the grating hole 1181 and the light receiver 153, so that the light signal emitted by the light emitter 152 is preferably received by the light receiver 153 without being blocked by the deformable portion 111, and the intensity of the light signal is relatively strong (e.g., the intensity of the light signal without being blocked/attenuated).

As shown in fig. 3B to fig. 3D, when the movable shaft 130 moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft 130 moves along the movement path to compress the elastic member 140 and push the deformable portion 111 to move, so that the deformable portion 111 and the optical transmission path do not have the first spatial relationship any more, and the optical signal received by the optical receiver 153 has a second intensity, and the second intensity is different from the first intensity, so as to trigger the switch module 150 to generate the trigger signal. In other words, when the movable shaft 130 moves to the pressing position along the movement path toward the bottom of the lower housing 110, the acting portion 131 pushes the deformable portion 111 to move, so as to change the spatial relationship between the deformable portion 111 and the light transmission path, and further change the intensity of the light signal received by the light receiver 153, so as to trigger the switch module 150 to generate the trigger signal. In this embodiment, the first spatial relationship represents that the deformable portion 111 is far away from the optical transmission path, and the intensity of the optical signal received by the optical receiver 153 is not substantially changed by the deformable portion 111. When the deformable portion 111 and the optical transmission path no longer have the first spatial relationship, it means that the deformable portion 111 enters the optical transmission path, and the deformable portion 111 attenuates the intensity of the optical signal received by the optical receiver 153, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 150 to generate the trigger signal.

Specifically, as shown in fig. 3B, when the key cap is pressed to move the movable shaft 130 toward the bottom of the lower housing 110, the acting portion 131 moves downward along the movement path along with the movable shaft 130, so that the end (i.e., the lower end) of the acting portion 131 abuts against the deformable portion 111. For example, the action portion 131 and the deformable portion 111 at least partially overlap in a direction parallel to the movement path (e.g., Z-axis direction), i.e., the deformable portion 111 is partially located on the movement path of the action portion 131, so that when the action portion 131 moves downward, the end (e.g., the first inclined surface 1311) of the action portion 131 abuts against the top (e.g., the second inclined surface 1111) of the deformable portion 111.

As shown in fig. 3C, when the movable shaft 130 moves to the triggering position along the movement path toward the bottom of the lower housing 110, the first inclined surface 1311 of the acting portion 131 moves relative to the second inclined surface 1111 of the deformable portion 111, so as to move the deformable portion 111 laterally, change the spatial relationship between the deformable portion 111 and the optical transmission path, and further change the intensity of the optical signal received by the optical receiver 153, so as to trigger the switch module 150 to generate the triggering signal. For example, when the movable shaft 130 continues to move toward the bottom of the lower housing 110 along the movement path to the triggering position, the deformable portion 111 moves laterally away from the movement path, the portion of the deformable portion 111 entering the light transmission path is more, the amount of the light signal blocked by the deformable portion 111 is higher, and the light signal received by the light receiver 153 has a relatively smaller second intensity (i.e., the second intensity is smaller than the first intensity) to trigger the switch module 150 to generate the triggering signal. Specifically, in this embodiment, when the acting portion 131 abuts against the deformable portion 111 and moves downward, the acting portion 131 and the deformable portion 111 at least partially contact in a direction perpendicular to the movement path, that is, the first inclined surface 1311 contacts the second inclined surface 1111 and moves downward relative to the second inclined surface 1111 and generates a lateral component force to push the deformable portion 111 to move laterally away from the acting portion 131, for example, to move toward the light transmission path. In one embodiment, when the deformable portion 111 moves laterally away from the movement path, the horizontal extension axis L preferably passes through the grating hole 1181, so that the deformable portion 111 substantially completely blocks the optical signal emitted by the optical transmitter 152 (i.e., the optical receiver 153 does not receive the optical signal, and the second intensity is zero). It should be noted that by changing the circuit design of the circuit board 151, the switch module 150 can generate the trigger signal according to the change of the light quantity received by the light receiver 153, and also can generate the trigger signal according to whether the light receiver 153 receives the light signal.

As shown in fig. 3D, when the movable shaft 130 is located at the pressing position (e.g., the lowest position), the end of the acting portion 131 goes beyond the deformable portion 111 and enters the escape space 155. Specifically, when the movable shaft 130 moves downward from the triggering position to the lowest position, the acting portion 131 protrudes from the bottom of the lower housing 110 through the opening 117 and enters the escape space 155 of the circuit board 151, so that the pressing stroke is increased and the operation feeling is improved. When the pressing force is released, the movable shaft 130 can return to the non-pressed position shown in fig. 3A by the restoring force provided by the elastic member 140 (i.e., the spring body 141), and drive the deformable portion 111 to return to the original position.

Fig. 4A to 5D are schematic diagrams of a second embodiment of the present invention, wherein fig. 4A and 4B are exploded schematic diagrams of an optical switch key according to the second embodiment of the present invention at different viewing angles, respectively, and fig. 4C is a cross-sectional schematic diagram of the optical switch key according to the second embodiment of the present invention. As shown in fig. 4A to 4C, the optical switch key 10' according to the second embodiment of the present invention includes a housing 100', a movable shaft 130, an elastic member 140 and a switch module 150, and the optical switch key 10' may further include a backlight unit 160. The optical switch key 10' of fig. 4A is different from the optical switch key 10 of fig. 1A in that the lower case 110' does not have the deformable portion 111, but the deformable portion 123 is provided in the upper case 120'. Therefore, the details of the structure and the connection relationship of the rest of the optical switch key 10 '(such as the movable shaft 130, the elastic member 140, the switch module 150, the backlight unit 160, etc.), and the corresponding details of the housing 100' and the housing 100 can refer to the related description of the optical switch key 10 of the first embodiment, and are not repeated herein. Hereinafter, the difference between the present embodiment and the first embodiment will be focused.

In this embodiment, the housing 100' is formed by combining the upper housing 120' and the lower housing 110', the deformable portion 123 is preferably an elastic arm extending downward from the lower surface of the upper housing 120', and the deformable portion 123 corresponds to the opening 117 of the lower housing 110 '. Specifically, the deformable portion 123 is preferably an L-shaped elastic arm including a connection portion 1232 and a shielding portion 1233, wherein one end of the connection portion 1232 of the deformable portion 123 is connected to the upper housing 120', and the other end of the connection portion 1232 is connected to the shielding portion 1233. Specifically, the connecting portion 1232 preferably extends parallel to the movement path of the acting portion 131 without interfering with the movement path, and the blocking portion 1233 is a free end of the deformable portion 123 and preferably extends from the tip of the connecting portion 1232 parallel to the bottom surface of the lower housing 110'. The shielding portion 1233 preferably corresponds to the acting portion 131 and is located in the opening 117 (or above the opening 117) of the lower housing 110', i.e. the projection of the shielding portion 1233 on the lower housing 110' is located in the opening 117. Furthermore, the width and length of the blocking portion 1233 are preferably greater than or equal to the width and length of the grating hole 1181, so that the blocking portion 1233 can selectively block the grating hole 1181 when the deformable portion 123 is displaced in response to the movement of the acting portion 131. It should be noted that, in this embodiment, the deformable portion 123 is illustrated as an L-shaped elastic arm including the connecting portion 1232 and the blocking portion 1233, but not limited thereto. In other embodiments, the deformable portion 123 may be an elastic arm having any suitable shape according to practical applications, such that the deformable portion 123 has a free end corresponding to the acting portion 131 and a connection end connected to the upper housing 120', and the free end can be pushed by the acting portion 131 to displace (or elastically deform) relative to the connection end.

Furthermore, the deformable portion 123 preferably has a second inclined surface 1231 corresponding to the first inclined surface 1311 of the acting portion 131. Specifically, the second inclined surface 1231 is preferably an inner side surface (i.e., a side surface facing the direction of the movable shaft 130) of the blocking portion 1233, and the second inclined surface 1231 extends downward and is inclined outward in the Z-axis direction such that the second inclined surface 1231 corresponds to the first inclined surface 1311.

The operation of the optical switch key 10 'of fig. 4A is described with reference to fig. 5A to 5D, wherein fig. 5A, 5B, 5C and 5D are schematic cross-sectional views of the optical switch key 10' at an un-pressed position, a contact position between the acting portion 131 and the deformable portion 123, an activated position and a lowest position, respectively. As shown in fig. 5A, when the movable shaft 130 is located at the non-pressed position, the acting portion 131 preferably at least partially overlaps the deformable portion 123 in a direction parallel to the movement path. For example, when the movable shaft 130 is located at the non-pressed position, the action portion 131 and the shielding portion 1233 of the deformable portion 123 preferably at least partially overlap in the Z-axis direction, i.e., a vertical projection of the action portion 131 and the shielding portion 1233 onto the lower housing 110' at least partially overlap. When the movable shaft 130 is located at the non-pressed position, the deformable portion 123 has a first spatial relationship with the optical transmission path, and the optical signal received by the optical receiver 153 has a first intensity. In this embodiment, when the movable shaft 130 is located at the non-pressed position, the blocking portion 1233 of the deformable portion 123 enters less of the optical transmission path portion, the amount of the optical signal blocked by the deformable portion 123 is lower, and the first intensity of the optical signal received by the optical receiver 153 is stronger. For example, when the movable shaft 130 is located at the non-pressed position, the horizontal extending axis (i.e. the extending axis substantially parallel to the light transmission path direction) of the blocking portion 1233 preferably does not pass through the grating hole 1181, that is, the deformable portion 123 is preferably located at one side of the virtual connection line (i.e. the light transmission path) of the light emitter 152, the grating hole 1181 and the light receiver 153, so that the light signal emitted by the light emitter 152 is preferably received by the light receiver 153 without being blocked by the deformable portion 123, and the intensity of the light signal is relatively strong (e.g. the intensity of the light signal without blocking/attenuating).

As shown in fig. 5B to 5D, when the movable shaft 130 moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft 130 moves along the movement path to compress the elastic member 140 and push the deformable portion 123 to move, so that the deformable portion 123 and the optical transmission path do not have the first spatial relationship any more, and the optical signal received by the optical receiver 153 has a second intensity, and the second intensity is different from the first intensity, so as to trigger the switch module 150 to generate the trigger signal. In other words, when the movable shaft 130 moves to the pressing position along the movement path toward the bottom of the lower housing 110', the acting portion 131 pushes the deformable portion 123 to move, so as to change the spatial relationship between the deformable portion 123 and the light transmission path, and further change the intensity of the light signal received by the light receiver 153, so as to trigger the switch module 150 to generate the trigger signal. In this embodiment, the first spatial relationship represents that the shielding portion 1233 of the deformable portion 123 is far away from the optical transmission path, and the shielding portion 1233 of the deformable portion 123 does not substantially change the intensity of the optical signal received by the optical receiver 153. When the shielding portion 1233 of the deformable portion 123 no longer has the first spatial relationship with the optical transmission path, the shielding portion 1233 of the deformable portion 123 enters the optical transmission path, and the deformable portion 123 attenuates the intensity of the optical signal received by the optical receiver 153, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 150 to generate the trigger signal.

Specifically, as shown in fig. 5B, when the key cap is pressed to move the movable shaft 130 toward the bottom of the lower housing 110', the acting portion 131 moves downward along the moving path along with the movable shaft 130, so that the end (i.e., the lower end) of the acting portion 131 abuts against the blocking portion 1233 of the deformable portion 123. For example, the action portion 131 and the shielding portion 1233 of the deformable portion 123 at least partially overlap in a direction parallel to the movement path (e.g., the Z-axis direction), that is, the shielding portion 1233 of the deformable portion 123 is partially located on the movement path of the action portion 131, so that when the action portion 131 moves downward, the tip (e.g., the first inclined surface 1311) of the action portion 131 abuts against the tip (e.g., the second inclined surface 1231) of the shielding portion 1233 of the deformable portion 123.

As shown in fig. 5C, when the movable shaft 130 continues to move along the movement path toward the bottom of the lower housing 110' to the triggering position, the first inclined surface 1311 of the acting portion 131 moves relative to the second inclined surface 1231 of the deformable portion 123, so that the deformable portion 123 moves laterally, the spatial relationship between the deformable portion 123 and the optical transmission path is changed, and the intensity of the optical signal received by the optical receiver 153 is changed, so as to trigger the switch module 150 to generate the triggering signal. For example, when the movable shaft 130 continues to move toward the bottom of the lower housing 110' to the triggering position along the movement path, the shielding portion 1233 of the deformable portion 123 moves laterally away from the movement path, the shielding portion 1233 of the deformable portion 123 enters more of the light transmission path, the amount of the light signal blocked by the deformable portion 123 is higher, and the light signal received by the light receiver 153 has a relatively smaller second intensity (i.e., the second intensity is smaller than the first intensity), so as to trigger the switch module 150 to generate the triggering signal. Specifically, when the action portion 131 abuts against the shielding portion 1233 of the deformable portion 123 and moves downward, the action portion 131 and the shielding portion 1233 of the deformable portion 123 at least partially contact in a direction perpendicular to the movement path (e.g., Y-axis direction), for example, the first inclined surface 1311 contacts the second inclined surface 1231 and moves downward relative to the second inclined surface 1231 and generates a lateral component force to push the deformable portion 123 to move laterally in a direction away from the action portion 131, for example, to move toward the light transmission path. In one embodiment, when the deformable portion 123 moves laterally away from the moving path, the horizontally extending axis of the blocking portion 1233 preferably passes through the grating hole 1181, so that the deformable portion 123 substantially completely blocks the optical signal emitted by the optical transmitter 152 (i.e., the optical receiver 153 does not receive the optical signal, and the second intensity is zero).

Further, as shown in fig. 5D, when the movable shaft 130 is located at the pressing position, the tip of the action portion 131 goes beyond the deformable portion 123 and enters the escape space 155 of the circuit board 151. Specifically, when the movable shaft 130 moves downward from the trigger position to the lowest position, the acting portion 131 protrudes from the bottom of the lower housing 110' through the opening 117 and enters the escape space 155 of the circuit board 151, so that the pressing stroke is increased and the operation feeling is improved. When the pressing force is released, the movable shaft 130 can return to the non-pressed position shown in fig. 5A by the restoring force provided by the elastic member 140 (i.e., the spring body 141), and drive the deformable portion 123 to return to the original position.

It should be noted that, in the foregoing embodiment, the deformable portion (e.g. 111 or 123) is pushed by the action portion 131 into the light transmission path for example, but not limited thereto. In other embodiments, by changing the design of the deformable portion 111 or 123 and the acting portion 131, when the movable shaft 130 is located at the non-pressing position, the amount of the light signal entering the deformable portion 111 or 123 is larger, and when the movable shaft 130 is located at the pressing position, the deformable portion 111 or 123 is pushed by the acting portion 131 to laterally displace, so that the amount of the light signal blocked by the deformable portion 111 or 123 is smaller, and further, the intensity of the light signal received by the light receiver 153 is stronger (i.e., the second intensity is greater than the first intensity), and the trigger switch module 150 generates the trigger signal. In the above embodiments, the deformable portion 111 or 123 is preferably formed integrally with the lower housing 110 or the upper housing 120', but not limited thereto. In other embodiments, the deformable portion 111 or 123 may be disposed on the lower housing 110 or the upper housing 120' by suitable bonding means (e.g., adhesion, fastening, locking, etc.).

Fig. 6A to 8B are schematic views of a third embodiment of the present invention, wherein fig. 6A and 6B are respectively exploded schematic views of an optical switch key according to the third embodiment of the present invention at different viewing angles, fig. 6C is an assembled top view of the optical switch key of fig. 6A without showing an upper housing, and fig. 6D is a partially hollowed-out perspective view of the optical switch key of fig. 6A without showing the upper housing. As shown in fig. 6A to 6D, the optical switch button 20 according to the third embodiment of the present invention includes a housing 200, a movable shaft 130, an elastic member 140, a switch module 150 and a shielding member 170. The movable shaft 130 is movably disposed in the housing 200, and in response to the pressing force, the movable shaft 130 can move up and down along the movement path to the non-pressed position and the pressed position. The elastic member 140 is disposed in the housing 200, and the elastic member 140 is coupled to the movable shaft 130. When the pressing force is removed, the elastic member 140 restores the movable shaft 130 to the non-pressed position. The switch module 150 includes a circuit board 151, an optical transmitter 152, and an optical receiver 153. The optical transmitter 152 and the optical receiver 153 are electrically connected to the circuit board 151, and the optical transmitter 152 transmits an optical signal to the optical receiver 153 along an optical transmission path. The shielding member 170 is disposed on the housing 200, when the movable shaft 130 is located at the non-pressed position, the shielding member 170 has a first spatial relationship with the optical transmission path, and the optical signal received by the optical receiver 153 has a first intensity; when the movable shaft 130 moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft 130 moves along the movement path to compress the elastic member 140 and drive the shielding member 170 to move, so that the shielding member 170 and the optical transmission path do not have the first spatial relationship any more, and the optical signal received by the optical receiver 153 has a second intensity, and the second intensity is different from the first intensity, so as to trigger the switch module 150 to generate the trigger signal.

It should be noted that, similar to the aforementioned embodiment, the optical switch key 20 may optionally further include a backlight unit 160 including a light guide post 161 and a backlight light source 162, and the movable shaft 130, the elastic member 140, the switch module 150 and the backlight unit 160 of the optical switch key 20 may have the same or similar structural details and connection relationships as those of the aforementioned embodiment (e.g., the optical switch keys 10 and 10'), and reference may be made to the related description of the aforementioned embodiment, which is not repeated herein.

In this embodiment, the housing 200 is formed by combining the upper housing 120 and the lower housing 210, and the shielding member 170 is disposed in the lower housing 210. It should be noted that the structural details of the upper housing 120 (e.g., the through hole 121 and the upper engaging portion 122) and the partial structural details of the lower housing 210 (e.g., the lower engaging portion 112, the positioning post 113, the positioning portion 114, the accommodating portion 1141, the limiting portion 115, the opening 117, etc.) may refer to the related description of the embodiment of fig. 1A, and are not repeated herein. Referring to fig. 7, the structural details of the shielding member 170 and the connection relationship with the lower case 210 will be emphasized. As shown in fig. 6C to 6D and fig. 7, the shielding member 170 is preferably in the form of a resilient piece, such as a metal resilient piece or a plastic resilient piece. In one embodiment, the shielding member 170 includes a positioning portion 171, a force-receiving portion 172 and a shielding portion 173, wherein the positioning portion 171 and the force-receiving portion 172 are disposed at two opposite ends of the shielding member 170, and the shielding portion 173 is connected to the force-receiving portion 172. The positioning portion 171 is connected to the lower housing 210 to position the shielding member 170 on the lower housing 210. Specifically, the positioning portion 171 is located at the connection end of the shielding member 170, and the force receiving portion 172 and the shielding portion 173 are located at the free end of the shielding member 170. The force receiving portion 172 corresponds to the action portion 131 of the movable shaft 130, and relatively moves with the action portion 131 in response to the vertical movement of the movable shaft 130, thereby changing the spatial relationship (or relative position) between the blocking portion 173 and the light transmission path. For example, in this embodiment, the shielding member 170 may be formed by bending a metal sheet similar to a T shape, wherein a horizontal top portion of the T-shaped metal spring is bent into an L shape, and two opposite ends of the T-shaped metal spring are respectively a positioning portion 171 and a force receiving portion 172 to be adjacent to two adjacent sides of the lower casing 210. That is, the positioning portion 171 and the force receiving portion 172 are connected in an arc shape or an L shape. The vertical lower portion of the T-shaped metal spring is used as a blocking portion 173, and the blocking portion 173 is preferably connected below the force-receiving portion 172.

The lower housing 210 has slots 211a, 211b corresponding to the positioning portion 171 of the shielding member 170, and the shielding member 170 can be inserted into the slots 211a, 211b by the positioning portion 171 to fix one end of the shielding member 170 to the lower housing 210, so that the force-receiving portion 172 and the shielding portion 173 form a free end capable of moving or bending and deforming relative to the positioning portion 171. The force-receiving portion 172 preferably has an inclined surface 1721 corresponding to the acting portion 131, so that the acting portion 131 can move along the inclined surface 1721 to drive the force-receiving portion 172 and the shielding portion 173 to move. In this embodiment, the inclined plane 1721 is preferably disposed at the top of the force-receiving portion 172, and extends downward from the direction toward the action portion 131. Furthermore, the blocking portion 173 is preferably at least partially bent and extended relative to the force-receiving portion 172, so that at least part of the blocking portion 173 can selectively interfere with the light transmission path. For example, the blocking portion 173 at least partially bends and extends toward the direction approaching the action portion 131, so that when the force-receiving portion 172 is driven by the action portion 131 to move relatively, the force-receiving portion 172 drives the blocking portion 173 to enter or leave the light transmission path. In another embodiment, the blocking portion 173 may be designed to be at least partially bent and extended away from the acting portion 131 according to practical applications. In addition, in the embodiment, the shielding member 170 is bent to make the positioning portion 171 and the force receiving portion 172 correspond to the two adjacent sides of the lower shell 210, but the invention is not limited thereto. In other embodiments, the positioning portion 171 and the force-receiving portion 172 of the shielding member 170 may be linearly disposed, that is, the positioning portion 171 and the force-receiving portion 172 are connected to be linear to correspond to the same side of the lower casing 210, for example, the shielding member 170 may be a T-shaped elastic sheet with no bending on the horizontal top.

Furthermore, similar to the previous embodiments, the blocking portion 173 of the shielding member 170 preferably corresponds to the opening 117 of the lower housing 210, for example, is located in the opening 117, or at least the projection of the blocking portion to the bottom of the lower housing 210 is located in the opening 117. When the movable shaft 130 moves from the non-pressed position to the pressed position in response to the pressing force, the acting portion 131 of the movable shaft 130 drives the blocking portion 173 of the shielding member 170 to move in the opening 117, so as to change the position relative to the light transmission path.

The operation of the optical switch button 20 of fig. 6A is described with reference to fig. 8A and 8B, wherein fig. 8A and 8B are partial top views of the optical switch button 20 at an un-pressed position and a pressed position, respectively. As shown in fig. 8A, when the movable shaft 130 is at the non-pressed position, the acting portion 131 and the shielding member 170 at least partially overlap in a direction parallel to the moving path, and the shielding member 170 has a first spatial relationship with the light transmission path, and the light signal received by the light receiver 153 has a first intensity. For example, when the movable shaft 130 is located at the non-pressing position, the acting portion 131 and the force-receiving portion 172 preferably at least partially overlap in the Z-axis direction, that is, the perpendicular projection of the acting portion 131 and the force-receiving portion 172 on the lower housing 210 at least partially overlap, or the force-receiving portion 172 is partially located on the movement path of the acting portion 131. Furthermore, in this embodiment, when the movable shaft 130 is located at the non-pressed position, the portion of the shielding member 170 entering the optical transmission path is small, the amount of the optical signal blocked by the shielding member 170 is small, and the first intensity of the optical signal received by the optical receiver 153 is strong. That is, when the movable shaft 130 is located at the non-pressed position, the portion of the shielding portion 173 of the shielding member 170 entering the optical transmission path is small, the amount of the optical signal blocked by the shielding portion 173 is small, and the first intensity of the optical signal received by the optical receiver 153 is strong. In one embodiment, when the movable shaft 130 is located at the non-pressed position, the blocking portion 173 preferably does not substantially enter the optical transmission path (or does not block the aforementioned grating hole 1181), that is, the blocking portion 173 is preferably located at one side of the optical transmission path of the optical transmitter 152 and the optical receiver 153, so that the optical signal emitted by the optical transmitter 152 is preferably received by the optical receiver 153 without being blocked by the blocking portion 173, and the intensity of the optical signal is relatively strong (e.g., the intensity of the optical signal without blocking/attenuating).

As shown in fig. 8B, when the movable shaft 130 moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft 130 moves along the movement path to compress the elastic member 140 and drive the shielding member 170 to move, so that the shielding member 170 and the light transmission path do not have the first spatial relationship any more, and the light signal received by the light receiver 153 has the second intensity, and the second intensity is different from the first intensity, so as to trigger the switch module 150 to generate the trigger signal. In this embodiment, the first spatial relationship represents that there is substantially no action (or no contact) between the force-receiving portion 172 and the action portion 131 of the shielding member 170, and the shielding portion 173 of the shielding member 170 does not substantially change the intensity of the optical signal received by the optical receiver 153. When the blocking portion 173 of the shielding member 170 no longer has the first spatial relationship with the optical transmission path, the relative displacement between the force-receiving portion 172 and the action portion 131 causes the blocking portion 173 to enter the optical transmission path, and the blocking portion 173 attenuates the intensity of the optical signal received by the optical receiver 153, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 150 to generate the trigger signal.

Specifically, when the movable shaft 130 is located at the pressing position, the shielding member 170 moves laterally away from the moving path, the shielding member 170 enters more of the light transmission path, the shielding member 170 blocks a higher amount of the light signal, and the light signal received by the light receiver 153 has a weaker second intensity (i.e., the second intensity is smaller than the first intensity). In other words, when the movable shaft 130 moves from the non-pressed position to the pressed position along the movement path toward the bottom of the lower housing 210, the acting portion 131 pushes the force-receiving portion 172 to move laterally away from the movement path, and drives the shielding portion 173 below the force-receiving portion 172 to move into a larger portion of the optical transmission path, so that the shielding portion 173 blocks a higher amount of the optical signal, and the optical signal received by the optical receiver 153 has a second intensity with a relatively weaker intensity, so as to trigger the switch module 150 to generate the trigger signal. In an embodiment, when the acting portion 131 moves downward to push the force-receiving portion 172, the first inclined surface 1311 of the acting portion 131 contacts and moves downward relative to the inclined surface 1721 of the force-receiving portion 172 to generate a lateral component force, so that the force-receiving portion 172 drives the blocking portion 173 to laterally deform and displace relative to the positioning portion 171, and further the blocking portion 173 substantially completely blocks the optical signal emitted by the optical emitter 152 (for example, blocks the aforementioned grating hole 1181), so that the optical receiver 153 does not receive the optical signal (i.e., the second intensity is zero). Furthermore, similarly, when the movable shaft 130 is located at the pressing position, the end of the acting portion 131 can enter the avoiding space 155 of the circuit board 151 through the opening 117 of the lower housing 210, so that the pressing stroke is increased and the operation feeling is improved. When the pressing force is released, the movable shaft 130 can return to the non-pressed position shown in fig. 8A by the restoring force provided by the elastic member 140 (e.g., the spring body 141), and drive the shielding member 170 to return to the original position (or shape).

It should be noted that, in the third embodiment, the shielding member 170 is pushed by the action portion 131 to make the blocking portion 173 enter and block the optical signal, but the invention is not limited thereto. In other embodiments, the design of the shielding member 170 and the acting portion 131 can be changed, so that the shielding member 170 is driven by the acting portion 131 to separate the blocking portion 173 from the light transmission path. Fig. 9A and 9B are partial top views of an optical switch button at an un-pressed position and a pressed position according to a fourth embodiment of the present invention. As shown in fig. 9A, when the movable shaft 130 is located at the non-pressed position, the shielding member 170 is located in the optical transmission path, the shielding member 170 blocks the optical signal, and the optical signal received by the optical receiver 153 has a weaker first intensity. Specifically, when the movable shaft 130 is located at the non-pressed position, the acting portion 131 abuts against the force-receiving portion 172 of the shielding member 170, so that the force-receiving portion 172 elastically deforms relative to the positioning portion 171 in a direction away from the acting portion 131, and the shielding portion 173 below the force-receiving portion 172 is driven to be located in the optical transmission path, for example, substantially shielding the grating hole 1181, so that the optical receiver 153 substantially does not receive the optical signal (i.e., the first intensity is zero). As shown in fig. 9B, when the movable shaft 130 is located at the pressing position, the shielding member 170 moves laterally away from the optical transmission path, and the optical signal received by the optical receiver 153 has a second stronger intensity (i.e., the second intensity is greater than the first intensity) to trigger the switch module 150 to generate the trigger signal. Specifically, when the movable shaft 130 moves from the non-pressed position to the pressed position, the acting portion 131 moves relative to the force receiving portion 172 of the shielding member 170 and passes over the force receiving portion 172 (for example, moves below the force receiving portion 172), so that the force receiving portion 172 is no longer pushed by the acting portion 131 and rebounds relative to the positioning portion 171 in a direction approaching to the acting portion 131, and further the blocking portion 173 is driven to move away from the light transmission path (i.e., the portion of the blocking portion 173 entering the light transmission path is less, or the grating hole 1181 is not substantially blocked), so that the light receiver 153 can receive the light signal transmitted by the light emitter 152 along the light transmission path, and the switch module 150 is triggered to generate the trigger signal.

It should be noted that, in the embodiment of fig. 9A and 9B, the inclined surface of the force-receiving portion 172 is preferably disposed below the force-receiving portion 172, and extends from top to bottom and inclines away from the acting portion 131. Thus, when the pressing force is released, the movable shaft 130 can drive the acting portion 131 to move upward along the inclined surface of the force-receiving portion 172 by the restoring force provided by the elastic member 140, and return to the non-pressing position where the acting portion 131 pushes against the force-receiving portion 172 to block the optical signal as shown in fig. 9A. Furthermore, in the embodiments of fig. 8A to 8B and fig. 9A to 9B, the light switch key generates the trigger signal by changing the intensity of the light signal received by the light receiver 153 through the shielding member 170 disposed on the housing 200, so that only the light shielding effect of the shielding member 170 needs to be considered, and the material and color of the housing 200 may not be limited by the light shielding requirement.

Fig. 10 to 12B are schematic diagrams of a fifth embodiment of the present invention, in which fig. 10 is an exploded view of an optical switch key according to the fifth embodiment of the present invention, fig. 11A and 11B are schematic diagrams of an upper housing and a lower housing of the optical switch key of fig. 10, respectively, and fig. 12A and 12B are schematic diagrams of the optical switch key of fig. 10 illustrating a top view and a perspective view of a keycap. As shown in fig. 10 to 12B, the optical switch key 30 according to the fifth embodiment of the present invention includes a key cap 310, a supporting mechanism 320, a returning mechanism 330, a switch module 340 and a bottom plate 350. The supporting mechanism 320 is disposed under the key cap 310 and supports the key cap 310 to move up/down, and the supporting mechanism 320 has a protrusion 323. The restoring mechanism 330 is disposed under the key cap 310 to provide a restoring force to restore the key cap 310 to a position before pressing after pressing. The restoring mechanism 330 includes a housing 331 and an elastic member 332, wherein the elastic member 332 is disposed in the housing 331, and the housing 331 has a deformable portion 333. The switch module 340 includes a circuit board 341, an optical transmitter 342 and an optical receiver 343, wherein the optical transmitter 342 and the optical receiver 343 are electrically connected to the circuit board 341, and the optical transmitter 342 transmits optical signals corresponding to the optical receiver 343. When the key cap 310 is not pressed, the optical signal received by the optical receiver 343 has a first intensity; when the key cap 310 is pressed, the key cap 310 drives the supporting mechanism 320 to move, so that the elastic member 332 is compressed and the protrusion 321 pushes against the deformable portion 333 to move to change the optical signal received by the optical receiver 343 to a second intensity, where the second intensity is different from the first intensity, so as to trigger the switch module 340 to generate the trigger signal.

Specifically, the key cap 310 can be, for example, an injection molded rectangular key cap, and the lower surface of the key cap 310 has a coupling member (not shown) for coupling with the supporting mechanism 320. The coupling member may be a coupling structure having a shaft hole or a sliding groove. Furthermore, according to practical applications, the key cap 310 can be a transparent key cap with a transparent portion, so as to be applied to a light-emitting keyboard. For example, the light-transmitting portion may be in the form of characters to represent instructions for keystrokes.

The bottom plate 350 serves as a structural strength support plate for the optical switch key 30 and has connection members 351 and 352 connected to the support mechanism 320. In one embodiment, the base plate 350 is preferably stamped and formed from a sheet metal member. The connecting members 351 and 352 are preferably hook-type connecting members bent and protruded from the surface of the base plate 350 toward the keycap 310. It should be noted that when the circuit board 341 has sufficient structural strength, the connecting members 351 and 352 may be selectively disposed on the circuit board 341, thereby eliminating the use of the bottom plate 350.

The supporting mechanism 320 preferably includes an inner support 321 and an outer support 322, and the inner support 321 is pivoted to the inner side of the outer support 322 to form a scissor-type supporting mechanism. The inner support 321 and the outer support 322 are preferably rectangular frames formed by injection molding, for example, and the inner support 321 and the outer support 322 can be rotatably connected by a pivot and shaft hole mechanism, for example. For example, opposite sides of the middle section of the inner bracket 322 have outwardly protruding pivots, and opposite inner sides of the outer bracket 322 have shaft holes corresponding to the pivots, so that the middle section of the inner bracket 321 and the middle section of the outer bracket 322 are coupled to each other. In addition, the inner support 321 and the outer support 322 are movably connected to the keycap 310 and the bottom plate 350 at two ends, respectively. For example, the key cap end of the inner support 321 has a coupling member rotatably coupled to the key cap 310, and the base end of the inner support 321 has a connecting member 351 movably coupled to the base 350. Similarly, the key cap end of outer bracket 322 has a coupling that is movably coupled to key cap 310, and the base end of outer bracket 322 has a link 352 that is movably coupled to base 350. Thereby, the supporting mechanism 320 can smoothly support the keycap 310 to move up/down with respect to the base plate 350.

The protrusion 323 is provided on the inner holder 321, and extends and protrudes from the inner holder 321 in the inner direction of the inner holder 321. For example, the protrusion 321 is preferably disposed inside the keycap end of the inner bracket 321, and the protrusion 323 preferably has a first slope 3231. In this embodiment, the first inclined surface 3231 of the protruding portion 323 is disposed at the distal end of the protruding portion 323 (i.e., the free end away from the inner bracket 321, and the protruding portion 323 further has a connecting end connected to the inner bracket 321), and preferably inclines downward from the distal end surface of the protruding portion 323 toward the connecting end connected to the inner bracket 321 to face the deformable portion 333 of the housing 331.

The circuit board 341 is preferably disposed on the base plate 350, and the circuit board 341 has an opening 3411 for allowing the connectors 351, 352 of the base plate 350 to pass through to connect to the supporting mechanism 320. The light emitter 342 and the light receiver 342 are disposed on the circuit board 341 and electrically connected to the circuit board 341. Specifically, the circuit board 341 preferably has a switch circuit, and the optical transmitter 342 and the optical receiver 343 are electrically connected to the switch circuit of the circuit board 341, so that the optical transmitter 342 can transmit an optical signal to the optical receiver 343, and when the intensity of the optical signal received by the optical receiver 343 changes, the trigger switch module 340 is triggered to generate a trigger signal. In other words, the operation of the switch module 340 to generate the trigger signal is similar to the switch module 150 of the previous embodiment. The circuit board 341 preferably has an escape space 3412 for receiving a portion of the protrusion 333 (e.g., the end of the protrusion 333). For example, the avoiding space 3412 may be an avoiding groove formed in the circuit board 341, and the optical transmitter 342 and the optical receiver 343 are disposed on opposite sides of the avoiding groove.

In addition, the light switch key 30 may optionally have a backlight light source 360. The circuit board 341 preferably has a light source circuit for driving the backlight source 360. The backlight source 360 may be disposed on the circuit board 341 and electrically connected to the light source circuit of the circuit board 341 to provide light to be emitted toward the light-transmitting portion of the key cap 310. The backlight source 360 is preferably disposed on opposite sides of the light emitter 342 and the light receiver 343, and is preferably located within a vertical projection area of the bottom plate 350 of the inner frame 321. For example, the light emitter 342 and the light receiver 343 are preferably disposed adjacent to the keycap end of the inner support 321 corresponding to the protrusion 323, and the backlight source 360 is disposed adjacent to the bottom plate end of the inner support 321 corresponding to the protrusion 323.

The restoring mechanism 330 is disposed between the key cap 310 and the base plate 350 (or the circuit board 341), and the restoring mechanism 330 includes a housing 331 and an elastic member 332. In this embodiment, the elastic member 332 is preferably a spring to provide a mechanical pressing operation feeling, but not limited thereto. In other embodiments, the elastic element 332 may be an elastic body to provide a restoring force after being pressed. The housing 331 is formed by combining an upper housing 334 and a lower housing 335 to form an accommodating space for disposing the elastic member 332. The restoring mechanism 330 further includes a movable portion 336, and the movable portion 336 is movably sleeved on the upper casing 334 (or the lower casing 335) relative to the upper casing 334. Specifically, the restoring mechanism 330 composed of the elastic element 332, the upper casing 334, the lower casing 335 and the movable part 336 has the structural details and the connection relationship similar to those of the casing 100 (or 100', 200), the movable shaft 130 and the elastic element 140 in the previous embodiments. For example, the upper housing 334 has a through hole 3341 and an upper engaging portion 3342 (e.g., a card slot). The movable portion 336 is movably inserted into the through hole 3341 from bottom to top to position the elastic member 332, and serves as an actuating member when the key cap 310 is pressed. The lower housing 335 has a lower engaging portion 3351 (e.g., a hook) for engaging with the upper engaging portion 3342, so that the upper housing 334 is connected to the lower housing 335.

In this embodiment, the upper casing 334 is preferably a rectangular cover structure having a notch 3343. The upper engaging portions 3342 are preferably disposed on both sides of the cutout portion 3343 such that a left arm portion 3345 is formed between the left upper engaging portion 3342 and the cutout portion 3343 and a right arm portion 3346 is formed between the right upper engaging portion 3342 and the cutout portion 3343. When the restoring mechanism 330 is disposed on the circuit board 341, the light emitter 342 and the light receiver 343 are preferably shielded by the housing 331 for dust prevention and reducing external light interference. For example, the light emitter 342 and the light receiver 343 are respectively located on two opposite sides of the notch portion 3343 and covered by the upper housing portion 334. In one embodiment, the lower housing 335 preferably has a substantially U-shaped horizontal cross-section. The left arm portion 3345 and the right arm portion 3346 of the upper housing 334 protrude from the lower housing 335 from two sides of the U-shaped horizontal cross section towards the center of the U-shaped horizontal cross section, facing each other (i.e. the vertical projection of the left arm portion 3345 and the right arm portion 3346 of the upper housing 334 is beyond the vertical projection of the lower housing 335), so as to form a notch portion 3343 between the left arm portion 3345 and the right arm portion 3346. The optical transmitter 342 and the optical receiver 343 are preferably disposed under the left arm 3345 and the right arm 3346, respectively, for achieving the dustproof effect, but not limited thereto. Furthermore, when the key cap 310 is pressed, the protrusion 323 preferably moves outside the elastic member accommodating space surrounded by the upper casing 334 and the lower casing 325 (i.e., moves in the notch 3343).

The movable portion 336 is preferably sleeve-shaped, and the movable portion 336 further has a position-limiting portion 3361 and an actuating portion 3362 at opposite sides of the sleeve, wherein the position-limiting portion 3361 is used for limiting the displacement of the movable portion 336 relative to the upper casing 334, and the actuating portion 3362 is used for providing tactile feedback in cooperation with a tactile elastic member (such as the extension arm 143 or the torsion spring of the elastic member 140 of the previous embodiment). It should be noted that, for the details of the structures of the position-limiting portion 3361 and the actuating portion 3362 and the functional relationship between the position-limiting portion 3361 and the actuating portion 3362 and the upper casing 334 and the elastic touch member, reference may be made to the related descriptions of the position-limiting portion 133 and the actuating portion 132 of the movable shaft 130 in the foregoing embodiments, and further description is omitted here.

The lower housing 335 further has a positioning portion 3352 for positioning the elastic member 332. In one embodiment, the positioning portion 3352 protrudes from the bottom surface of the lower housing 335 toward the upper housing 334 corresponding to the movable portion 336. When the restoring mechanism 330 is assembled, the spring-type elastic member 332 is sleeved outside the positioning portion 3352 of the lower housing 335, so that the elastic member 332 is positioned between the movable portion 336 and the lower housing 335. When the key cap 310 is pressed, the movable portion 336 may move downward with respect to the upper case 334 to compress the elastic member 332. When the key cap 310 is released, the elastic member 332 provides an elastic force, so that the movable portion 336 drives the key cap 310 to move upward relative to the upper housing portion 334, and is positioned at a position before being pressed by the position-limiting portion 3361.

In this embodiment, the restoring mechanism 330 may be supported and positioned on the circuit board 341 by the lower housing 335. Specifically, the lower housing 335 may include supporting portions 3353 and 3354, which are preferably disposed on opposite sides of the lower housing 335, such that the supporting portions 3353 are supported on the circuit board 341 adjacent to the light emitter 342 and the light receiver 343, and the supporting portions 3354 are supported on the circuit board 341 adjacent to the backlight source 360. In one embodiment, the supporting portion 3353 may be a pair of supporting arms extending from the lower housing 335 to protrude, and the supporting arms correspond to the optical transmitter 342 and the optical receiver 343 respectively located under the left arm 3345 and the right arm 3346 of the upper housing 334. The supporting portions 3354 may be a pair of supporting concave blocks extending and protruding from the lower housing 335, such that the upper housing 334 forms a recess 3344 corresponding to the supporting portions 3354, and the backlight 360 is preferably disposed at a position corresponding to the recess 3344. In this way, the light emitted from the backlight source 360 is blocked by the recovery mechanism 330, so as to avoid affecting the intensity of the light signal received by the light receiver 343, and further avoid the switch module 340 from generating the trigger signal by mistake.

In this embodiment, the restoring mechanism 330 further includes a feel elastic member 370, and the feel elastic member 370 is used to provide tactile feedback when pressing. For example, the feel elastic member 370 may be implemented as a torsion spring, one end of which serves as a positioning portion (e.g., 371 shown in fig. 13), and the other end of which serves as an extension arm 372. The lower housing 335 correspondingly has a positioning hole, when the feel elastic element 370 is disposed on the lower housing 335, the positioning part is coupled to the positioning hole, and the extension arm 372 corresponds to the actuating part 3362 of the movable part 336. When the key cap 310 is pressed, the actuating portion 3362 and the extension arm 372 of the torsion spring are displaced relative to each other as the key cap 310 moves downward, so that a user's finger first feels a large resistance, and then the extension arm 372 is released from the pressing of the actuating portion 3362, so that the resistance felt by the user's finger is greatly reduced, thereby providing a step difference feeling when the user presses the touch part, and the extension arm 372 can knock the upper housing portion 334 or the lower housing portion 335 to generate a sound. When the key cap 310 is released, the elastic member 332 provides a restoring force to move the key cap 310 upward, and the actuator portion 3362 is moved upward, and the extension arm 372 slides downward relative to the actuator portion 3362 to return to the original position.

It should be noted that, similar to the previous embodiment, the housing 331 may have the grating portion 337, and the grating portion 337 is preferably disposed on the upper housing 334. For example, the grating portion 337 may be disposed on the left arm portion 3345 or the right arm portion 3346 of the upper housing 334, and is adjacent to the light emitter 342, but not limited thereto. According to practical applications, the grating portion 337 can be adjacent to the optical receiver 343, so that the optical signal is not easily interfered by external light at the receiving end, and the possibility of false triggering can be reduced more effectively.

As shown in fig. 11B, in this embodiment, the deformable portion 333 of the case 331 is provided to the lower case 335 so as to correspond to the protruding portion 323 of the support mechanism 320. Specifically, the deformable portion 333 is an elastic arm disposed on the lower housing 335 and extending toward the keycap 310 (e.g., upward), such that the deformable portion 333 is displaceable (or elastically deformed) in response to the movement of the protruding portion 323, and further changes a spatial relationship (or a relative position) of the deformable portion 333 with respect to a light transmission path between the light emitting portion 342 and the light receiving portion 343, so as to trigger the switch unit 340 to generate the trigger signal. In this embodiment, the deformable portion 333 is preferably integrally formed with the lower housing 335, but not limited thereto. In other embodiments, the deformable portion 333 may be connected to the lower housing 335 by any suitable engagement mechanism. In this embodiment, the deformable portion 333 may extend from the wall surface of the bottom end of the U-shaped horizontal section of the lower housing 335 toward the open end of the U-shaped horizontal section. In other words, one end of the deformable portion 333 is preferably connected to the lower housing 335, and the other end of the deformable portion 333 opposite to the other end is a free end located in the notch 3343 of the upper housing 334. In this embodiment, the deformable portion 333 is preferably a flexible arm including a connecting portion 3332 and a shielding portion 3333, wherein the connecting portion 3332 is preferably a connecting arm extending horizontally parallel to the bottom surface of the lower housing 335 to connect the lower housing 335 and the shielding portion 3333. The shielding portion 3333 extends from the connection portion 3332 toward the key cap 310 (i.e., extends upward in the Z-axis direction) to be located in the notch portion 3343 of the upper case 334 and to correspond to the protruding portion 323 of the support mechanism 320.

Furthermore, the deformable portion 333 preferably has a second inclined surface 3331 corresponding to the first inclined surface 3231 of the protrusion 323. When the key cap 310 moves the supporting mechanism 320, the first inclined surface 3231 moves relative to the second inclined surface 333, so that the deformable portion 333 moves laterally. Specifically, the second inclined surface 3331 is preferably an outer side surface (i.e., a side surface facing the protruding portion 323 direction) of the shielding portion 3333, and extends downward in the Z-axis direction and is inclined outward such that the second inclined surface 3331 corresponds to the first inclined surface 3231.

The operation of the optical switch key 30 according to the fifth embodiment of the present invention will be described with reference to fig. 12A and 12B. As shown in fig. 12A and 12B, when the key cap 310 is not pressed, the protruding portion 323 and the deformable portion 333 at least partially overlap in a direction parallel to the moving direction of the key cap 310 (for example, the Z-axis direction), the deformable portion 333 has a first spatial relationship with the optical transmission path, and the optical signal received by the optical receiver 343 has a first intensity. When the key cap 310 is pressed, the key cap 310 drives the supporting mechanism 320 to move, so that the elastic element 332 is compressed and the protruding portion 323 pushes the deformable portion 333 to move, so that the deformable portion 333 and the optical transmission path do not have the first spatial relationship, and the optical signal received by the optical receiver 343 has a second intensity, where the second intensity is different from the first intensity, so as to trigger the switch module 340 to generate the trigger signal.

In this embodiment, the first spatial relationship represents that the deformable portion 333 is far away from the optical transmission path, and the intensity of the optical signal received by the optical receiver 343 is not substantially changed by the deformable portion 333. When the deformable portion 333 and the optical transmission path no longer have the first spatial relationship, it means that the deformable portion 333 enters the optical transmission path, and the deformable portion 333 attenuates the intensity of the optical signal received by the optical receiver 343, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 340 to generate the trigger signal.

Specifically, when the key cap 310 is pressed to move the supporting mechanism 320, the protrusion 323 pushes the deformable portion 333 to move so as to at least partially block the optical signal, so that the second intensity is smaller than the first intensity. In one embodiment, when the key cap 310 is pressed, the protrusion 323 pushes the deformable portion 333 to move laterally, and the protrusion 323 contacts the deformable portion 333 at least partially in a direction perpendicular to the moving direction of the key cap 310, for example, the protrusion 323 contacts the deformable portion 333 at least partially in the Y-axis direction. Specifically, when the key cap 310 moves the supporting mechanism 320, the first inclined surface 3231 of the protruding portion 323 moves relative to the second inclined surface 3331 of the deformable portion 333 and generates a lateral component force, so that the deformable portion 333 moves laterally and enters the light transmission path. For example, the first inclined surface 3231 of the protruding portion 323 moves relative to the second inclined surface 3331 of the deformable portion 333 and generates a lateral component force to move the deformable portion 333 laterally toward the bottom of the U-shaped horizontal cross-section of the lower housing 335 (i.e., away from the connecting end of the protruding portion 323 and the inner bracket 321, the moving direction is shown by arrow a) to change the relative position between the deformable portion 333 and the grating portion 337 (e.g., at least partially shielding the grating hole of the grating portion 337), so that the second strength is smaller than the first strength, thereby generating the trigger signal by the switch module 340.

In one embodiment, when the key cap 310 is pressed to move the protruding portion 323, the deformable portion 333 preferably completely blocks the optical signal, so that the optical signal is not received by the optical receiver 343 (i.e. the second intensity is zero). It should be noted that by changing the circuit design of the circuit board 341, the switch module 340 can generate the trigger signal according to the change of the light quantity received by the optical receiver 343, and can also generate the trigger signal according to whether the optical receiver 343 receives the optical signal.

Fig. 13 to 15B are schematic views illustrating a sixth embodiment of the invention, in which fig. 13 is an exploded view of an optical switch key according to the sixth embodiment of the invention, fig. 14A and 14B are schematic views illustrating an upper housing of the optical switch key of fig. 13 at different viewing angles, respectively, and fig. 15A and 15B are schematic views illustrating a top view and a perspective view of a key cap of the optical switch key of fig. 13. As shown in fig. 13 to fig. 15B, the optical switch key 30' according to the sixth embodiment of the present invention includes a key cap 310, a supporting mechanism 320, a returning mechanism 330', a switch module 340, and a bottom plate 350, and the optical switch key 30' may optionally further include a backlight source 360. The optical switch key 30' of fig. 13 is different from the optical switch key 30 of fig. 10 in that the lower case 335' does not have the deformable portion 333, but the deformable portion 338 is provided on the upper case 334 '. Therefore, for the structural details and the connection relationship of the rest of the optical switch key 30 '(such as the key cap 310, the supporting mechanism 320, the switch module 340, the bottom plate 350, the backlight source 360, etc.), and the corresponding structural details of the housing 331' and the housing 331, reference can be made to the related description of the optical switch key 30 of the fifth embodiment, which will not be repeated herein.

In this embodiment, the housing 331 'is formed by combining the upper housing 334' and the lower housing 335', and the deformable portion 338 is preferably a resilient arm formed by extending from the upper housing 334'. Specifically, the deformable portion 338 is preferably an L-shaped elastic arm including a connecting portion 3382 and a shielding portion 3383, and is preferably disposed corresponding to the opening of the notch portion 3343, wherein one end of the connecting portion 3382 is connected to the upper housing 334', and the other end of the connecting portion 3382 is connected to the shielding portion 3383. The connecting portion 3382 of the deformable portion 338 is preferably a rod or arm with any suitable shape, wherein one end of the connecting portion 3382 is preferably connected to one of the right arm portion 3346 or the left arm portion 3345, and the other end of the connecting portion 3382 extends toward the other of the right arm portion 3346 or the left arm portion 3345 and is connected to the shielding portion 3383 to form a free end of the deformable portion 338. For example, one end of the connecting portion 3382 of the deformable portion 338 is connected to the right arm portion 3346, and the other end of the connecting portion 3382 extends toward the left arm portion 3345 and partially corresponds to the opening of the notch portion 3343. The shielding portion 3383 preferably extends downward from the connecting portion 3382 in the Z-axis direction and corresponds to the protruding portion 323. It should be noted that, in the embodiment, the shielding portion 3383 is illustrated as extending downward from the connecting portion 3332, but not limited thereto. In other embodiments, the shielding portion 3383 may extend upward from the connecting portion 3382 according to practical applications. Furthermore, the deformable portion 338 may be an elastic arm having any suitable shape according to practical applications, such that the deformable portion 338 has a free end corresponding to the protrusion 323 and a connecting end connected to the upper housing 334', and the free end can be pushed by the protrusion 323 to be displaced (or elastically deformed) relative to the connecting end.

Similarly, the deformable portion 338 preferably has a second inclined surface 3381 to correspond to the first inclined surface 3231 of the protrusion 323. Specifically, the second inclined surface 3381 is preferably an outer side surface (i.e., a side surface facing the direction of the protruding portion 323) of the shielding portion 3383, and the second inclined surface 3381 is adjacent to the top of the shielding portion 3383 and extends downward and is inclined outward in the Z-axis direction such that the second inclined surface 3381 corresponds to the first inclined surface 3231.

The operation of the optical switch key 30' according to the sixth embodiment of the present invention will be described with reference to fig. 15A and 15B. As shown in fig. 15A and 15B, when the key cap 310 is not pressed, the protruding portion 323 and the deformable portion 338 at least partially overlap in a direction parallel to the moving direction (for example, the Z-axis direction) of the key cap 310, the deformable portion 338 has a first spatial relationship with the optical transmission path, and the optical signal received by the optical receiver 343 has a first intensity. When the key cap 310 is pressed, the key cap 310 drives the supporting mechanism 320 to move, so that the elastic member 332 is compressed and the protrusion 323 pushes the deformable portion 338 to move, so that the deformable portion 338 and the optical transmission path do not have the first spatial relationship any more, and the optical signal received by the optical receiver 343 has a second intensity different from the first intensity, so as to trigger the switch module 340 to generate the trigger signal. Similarly, in this embodiment, the first spatial relationship represents that the deformable portion 338 is far away from the optical transmission path, and the strength of the optical signal received by the optical receiver 343 is not substantially changed by the deformable portion 338. When the deformable portion 338 and the optical transmission path no longer have the first spatial relationship, the deformable portion 338 enters the optical transmission path, and the deformable portion 338 attenuates the intensity of the optical signal received by the optical receiver 343, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 340 to generate the trigger signal.

Specifically, when the key cap 310 is pressed to move the supporting mechanism 320, the protrusion 323 pushes the deformable portion 338 to move so as to at least partially block the optical signal, so that the second intensity is smaller than the first intensity. In one embodiment, when the key cap 310 is pressed, the protrusion 323 pushes the deformable portion 338 to move laterally, and the protrusion 323 contacts the deformable portion 338 at least partially in a direction perpendicular to the moving direction of the key cap 310, for example, the protrusion 323 contacts the deformable portion 338 at least partially in the Y-axis direction. Specifically, when the key cap 310 moves the supporting mechanism 320, the first inclined surface 3231 of the protruding portion 323 moves relative to the second inclined surface 3381 of the deformable portion 338 and generates a lateral component force, so that the deformable portion 338 moves laterally into the light transmission path. For example, the first inclined surface 3231 of the protrusion 323 moves relative to the second inclined surface 3381 of the deformable portion 338 and generates a lateral component force to move the deformable portion 338 laterally toward the bottom end of the notch 3343 of the upper housing 334' (i.e., away from the connecting end of the protrusion 323 and the inner bracket 321, the moving direction being indicated by arrow a), so as to at least partially block the optical signal, such that the second strength is smaller than the first strength, thereby generating the trigger signal for the switch module 340.

In one embodiment, when the key cap 310 is pressed to move the protrusion 323, the deformable portion 338 preferably blocks the optical signal completely, so that the optical signal is not received by the optical receiver 343 (i.e. the second intensity is zero). It should be noted that by changing the circuit design of the circuit board 341, the switch module 340 can generate the trigger signal according to the change of the light quantity received by the optical receiver 343, and can also generate the trigger signal according to whether the optical receiver 343 receives the optical signal.

It should be noted that in the first to sixth embodiments, the optical switch key drives the deformable portion (e.g., 111, 123, 333, or 338) of the housing or the shielding member 170 disposed on the housing to substantially move laterally (or horizontally) relative to the pressing direction through the action portion 131 of the movable shaft 130 or the protrusion 323 of the supporting mechanism 320, so as to change the intensity of the optical signal received by the optical receiver (e.g., 153 or 343), and further trigger the switch module (e.g., 150 or 340) to generate the trigger signal, thereby reducing the space requirement of the optical switch key in the Z-axis direction, and effectively reducing the key height, but not limited thereto. In other embodiments, the optical switch key can move the deformable portion of the housing substantially parallel to the pressing direction (or vertically) by the action portion 131 of the movable shaft 130 or the protrusion 323 of the supporting mechanism 320, so that the switch module (e.g., 150 or 340) is triggered.

Fig. 16A to 18B are schematic views illustrating a seventh embodiment of the invention, wherein fig. 16A and 16B are exploded schematic views of an optical switch key according to the seventh embodiment of the invention at different viewing angles, respectively, fig. 16C is an assembly schematic view of the optical switch key of fig. 16A without showing an upper housing, and fig. 16D is a cross-sectional view including the upper housing along a tangent line CC of fig. 16C. As shown in fig. 16A to 16D, the optical switch key 11 according to the seventh embodiment of the invention includes a housing 400, a movable shaft 130, an elastic member 140 and a switch module 150, and the optical switch key 11 may optionally further include a backlight unit 160. The optical switch key 11 of fig. 16A differs from the optical switch key 10 of fig. 1A in the form of the deformable portion 411 of the lower case 410. Therefore, for the structural details and the connection relationship of the rest of the optical switch key 11 (such as the movable shaft 130, the elastic element 140, the switch module 150, the backlight unit 160, etc.), and the corresponding structural details of the housing 400 and the housing 100, reference may be made to the related description of the optical switch key 10 of the first embodiment, which is not repeated herein.

In this embodiment, the housing 400 is formed by combining the upper housing 120 and the lower housing 410, and the deformable portion 411 is preferably a resilient arm extending from the lower housing 410 into the opening 117. As shown in fig. 17A and 17B, the deformable portion 411 is preferably a resilient arm including a connecting portion 4111 and a shielding portion 4112, wherein the connecting portion 4111 is preferably a connecting arm extending horizontally parallel to the bottom surface of the lower housing 410 to connect the lower housing 410 and the shielding portion 4112. The shielding portion 4112 is located at the free end of the deformable portion 411 and corresponds to the acting portion 131 of the movable shaft 130. The shielding portion 4112 can be pushed by the acting portion 131, so that the deformable portion 411 bends and displaces downward. When the shielding portion 4112 is pushed by the acting portion 131, the shielding portion 4112 drives the connecting portion 4111 to elastically deform relative to the lower housing 410. In an embodiment, the shielding portion 4112 of the deformable portion 411 preferably has a size capable of substantially completely shielding the optical signal, but is not limited thereto. In other embodiments, the shielding portion 4112 of the deformable portion 411 at least partially shields the optical signal.

The operation of the optical switch key 11 according to the seventh embodiment of the present invention is described with reference to fig. 18A and 18B, wherein fig. 18A and 18B are schematic cross-sectional views of the optical switch key 11 including the upper housing at the non-pressed position and the pressed position along the tangent DD of fig. 16C, respectively. As shown in fig. 18A, when the movable shaft 130 is located at the non-pressed position, the acting portion 131 preferably at least partially overlaps with the deformable portion 411 in a direction parallel to the movement path. For example, when the movable shaft 130 is located at the non-pressed position, the acting portion 131 and the deformable portion 411 preferably at least partially overlap in the Z-axis direction, i.e., the perpendicular projection of the acting portion 131 and the deformable portion 411 on the lower housing 410 at least partially overlaps. When the movable shaft 130 is located at the non-pressed position, the deformable portion 411 and the optical transmission path have a first spatial relationship, and the optical signal received by the optical receiver 153 has a first intensity. In this embodiment, when the movable shaft 130 is located at the non-pressed position, the deformable portion 411 enters less part of the optical transmission path, the amount of the optical signal blocked by the deformable portion 411 is lower, and the first intensity of the optical signal received by the optical receiver 153 is stronger. For example, when the movable shaft 130 is located at the non-pressed position, the deformable portion 411 is preferably located above the optical transmission path, so that the optical signal emitted by the optical transmitter 152 is preferably received by the optical receiver 153 without being blocked by the deformable portion 411, and the intensity of the optical signal is relatively strong (e.g., the intensity of the optical signal without blocking/attenuating).

As shown in fig. 18B, when the movable shaft 130 moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft 130 moves along the movement path to compress the elastic member 140 and push the deformable portion 411 to move, so that the deformable portion 411 and the light transmission path do not have the first spatial relationship any more, and the light signal received by the light receiver 153 has a second intensity, and the second intensity is different from the first intensity, so as to trigger the switch module 150 to generate the trigger signal. In other words, when the movable shaft 130 moves along the movement path toward the bottom of the lower housing 410 to the pressing position, the acting portion 131 pushes the deformable portion 411 to move downward, so as to change the spatial relationship between the deformable portion 411 and the optical transmission path, and further change the intensity of the optical signal received by the optical receiver 153, so as to trigger the switch module 150 to generate the trigger signal. In this embodiment, the first spatial relationship represents that the deformable portion 411 is far away from the optical transmission path, and the strength of the optical signal received by the optical receiver 153 is not substantially changed by the deformable portion 411. When the deformable portion 411 and the optical transmission path no longer have the first spatial relationship, which means that the deformable portion 411 enters the optical transmission path, and the deformable portion 411 attenuates the intensity of the optical signal received by the optical receiver 153, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 150 to generate the trigger signal.

Specifically, when the key cap is pressed to drive the movable shaft 130 to move toward the bottom of the lower housing 410, the acting portion 131 moves downward along the moving path along the movable shaft 130, so that the end (i.e., the lower end) of the acting portion 131 abuts against the shielding portion 4112 of the deformable portion 411, and presses the shielding portion 4112 downward, so that the deformable portion 411 elastically deforms downward with the connecting end of the connecting portion 4111 as a fulcrum, and the shielding portion 4112 at least partially blocks the optical signal (e.g., at least partially blocks the grating hole 1181), so that the second intensity is smaller than the first intensity, and the switch module 150 generates the trigger signal.

Fig. 19A to 21B are schematic diagrams of an eighth embodiment of the invention, wherein fig. 19A and 19B are respectively schematic diagrams of an optical switch key according to the eighth embodiment of the invention in an exploded view at different viewing angles, fig. 19C is a schematic diagram of an assembled top view of the optical switch key of fig. 19A without showing an upper shell, and fig. 19D is a schematic cross-sectional view including the upper shell along a tangent line EE of fig. 19C. As shown in fig. 19A to 19D, the optical switch key 11' according to the seventh embodiment of the invention includes a housing 400', a movable shaft 130, an elastic member 140 and a switch module 150, and the optical switch key 11' may further include a backlight unit 160. The optical switch key 11 'of fig. 19A is different from the optical switch key 10' of fig. 4A in the form of the deformable portion 421 of the upper case 420. Therefore, the structural details and the connection relationship of the remaining components (such as the movable shaft 130, the elastic member 140, the switch module 150, the backlight unit 160, etc.) of the optical switch key 11 'and the corresponding structural details of the housing 400' and the housing 100 'can be referred to the related description of the optical switch keys 10 and 10' of the first or second embodiment, and are not repeated herein.

In this embodiment, the housing 400 'is formed by combining the upper housing 420 and the lower housing 410', and the deformable portion 421 is preferably a resilient arm extending from the upper housing 420. As shown in fig. 20A and 20B, the deformable portion 421 is preferably an elastic arm including a connecting portion 4211 and a blocking portion 4212. For example, the connection portion 4211 is preferably an L-shaped connection arm, wherein the connection portion 4211 extends vertically downward from the lower surface of the upper housing 420 toward the lower housing 410', and then extends horizontally to connect the shielding portion 4212 and correspond to the acting portion 131 of the movable shaft 130. In other words, the connecting portion 4211 preferably extends downward from the upper housing 420 by a length such that the connecting portion 4211 partially extends horizontally below the acting portion 131. The shielding portion 4212 is located at the free end of the deformable portion 421, and the size of the shielding portion 4212 is preferably larger than that of the connection portion 4211, so that the connection portion 4211 has a large elastic deformation force with respect to the shielding portion 4212. When the horizontal segment of the connecting portion 4211 is pushed by the acting portion 131, the blocking portion 4212 is driven to elastically deform downward relative to the lower housing 410'. In an embodiment, the shielding portion 4212 of the deformable portion 421 preferably has a size capable of substantially completely shielding the optical signal, but is not limited thereto. In other embodiments, the shielding portion 4212 of the deformable portion 421 can at least partially shield the optical signal.

The operation of the optical switch key 11 'according to the eighth embodiment of the present invention is described with reference to fig. 21A and 21B, in which fig. 21A and 21B are schematic cross-sectional views of the optical switch key 11' at the non-pressed position and the pressed position along a tangent line FF of fig. 19C, respectively. As shown in fig. 21A, when the movable shaft 130 is located at the non-pressed position, the acting portion 131 preferably at least partially overlaps the deformable portion 421 in a direction parallel to the movement path. For example, when the movable shaft 130 is located at the non-pressed position, the acting portion 131 and the deformable portion 421 preferably at least partially overlap in the Z-axis direction, i.e., the perpendicular projection of the acting portion 131 and the deformable portion 421 on the lower housing 410' at least partially overlap. When the movable shaft 130 is located at the non-pressed position, the deformable portion 421 has a first spatial relationship with the optical transmission path, and the optical signal received by the optical receiver 153 has a first intensity. In this embodiment, when the movable shaft 130 is located at the non-pressed position, the deformable portion 421 enters the light transmission path less, the amount of the light signal blocked by the deformable portion 421 is lower, and the first intensity of the light signal received by the light receiver 153 is stronger. For example, when the movable shaft 130 is located at the non-pressed position, the deformable portion 421 is preferably located above the optical transmission path, so that the optical signal emitted by the optical transmitter 152 is preferably received by the optical receiver 153 without being blocked by the deformable portion 421, and the intensity of the optical signal is relatively strong (e.g., the intensity of the optical signal without blocking/attenuating).

As shown in fig. 21B, when the movable shaft 130 moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft 130 moves along the movement path to compress the elastic member 140 and push the deformable portion 421 to move, so that the deformable portion 421 and the optical transmission path do not have the first spatial relationship any more, and the optical signal received by the optical receiver 153 has a second intensity, and the second intensity is different from the first intensity, so as to trigger the switch module 150 to generate the trigger signal. In other words, when the movable shaft 130 moves to the pressing position along the movement path toward the bottom of the lower housing 110, the acting portion 131 pushes the deformable portion 421 to move downward, so as to change the spatial relationship between the deformable portion 421 and the light transmission path, and further change the intensity of the light signal received by the light receiver 153, so as to trigger the switch module 150 to generate the trigger signal. In this embodiment, the first spatial relationship represents that the deformable portion 421 is far away from the optical transmission path, and the strength of the optical signal received by the optical receiver 153 is not substantially changed by the deformable portion 421. When the deformable portion 421 and the optical transmission path no longer have the first spatial relationship, which means that the deformable portion 421 enters the optical transmission path, and the deformable portion 421 attenuates the intensity of the optical signal received by the optical receiver 153, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 150 to generate the trigger signal.

Specifically, when the key cap is pressed to move the movable shaft 130 toward the bottom of the lower housing 410', the action portion 131 moves downward along the moving path along with the movable shaft 130, so that the end (i.e., the lower end) of the action portion 131 abuts against and presses downward against the deformable portion 421 (e.g., the horizontal section or the shielding portion 4212 of the connection portion 4211), so that the deformable portion 421 is elastically deformed downward with the connection end of the connection portion 4211 as a fulcrum, and at least partially blocks the optical signal (e.g., at least partially shields the grating hole 1181), so that the second strength is smaller than the first strength, and the switch module 150 generates the trigger signal.

Fig. 22 to 24B are schematic diagrams illustrating a ninth embodiment of the invention, wherein fig. 22 is an exploded schematic diagram of an optical switch key according to the ninth embodiment of the invention, fig. 23 is a schematic diagram of a lower housing of the optical switch key of fig. 22, and fig. 24A and 24B are schematic diagrams illustrating a top view and a perspective view of a key cap of the optical switch key of fig. 22. As shown in fig. 22 to 24B, the optical switch key 31 of the ninth embodiment of the invention includes a key cap 310, a supporting mechanism 320, a restoring mechanism 530, a switch module 340 and a bottom plate 350, and the optical switch key 31 may further include a backlight source 360. The optical switch key 31 of fig. 22 is different from the optical switch key 30 of fig. 10 in the form of the transformable portion 533 of the lower case 535. Therefore, the structural details and the connection relationship of the remaining components (such as the key cap 310, the supporting mechanism 320, the switch module 340, the bottom plate 350, the backlight source 360, etc.) of the optical switch key 31, and the corresponding structural details and the connection relationship of the restoring mechanism 530 and the restoring mechanism 330 can refer to the related description of the optical switch key 30 of the fifth embodiment, and are not repeated herein.

In this embodiment, the housing 531 is formed by combining the upper housing 334 and the lower housing 535, and the deformable portion 533 is preferably a resilient arm extending from the lower housing 535 into the notch 3343 of the upper housing 334. As shown in fig. 23, the deformable portion 533 is preferably an elastic arm including a connecting portion 5331 and a blocking portion 5332. The connecting portion 5331 preferably extends from the wall surface at the bottom end of the U-shaped horizontal section of the lower housing 535 toward the open end of the U-shaped horizontal section, extends upward toward the upper housing 334, and then extends horizontally below the acting portion 131 toward the acting portion 131. In this embodiment, the connecting portion 5331 extends upward from the lower housing 535 preferably such that the connecting portion 5331 partially extends horizontally above the optical transmission path. The shielding portion 5332 is located at the free end of the deformable portion 533. When the horizontal section of the connecting portion 5331 is pushed by the action portion 131, it drives the shielding portion 5332 to elastically deform downward relative to the lower housing 535. In one embodiment, the shielding portion 5332 of the deformable portion 533 preferably has a size that substantially completely shields the optical signal, but not limited thereto. In other embodiments, the shielding portion 5332 of the deformable portion 533 can at least partially shield the optical signal.

The operation of the optical switch key 31 according to the ninth embodiment of the present invention will be described with reference to fig. 24A and 24B. As shown in fig. 24A and 24B, when the key cap 310 is not pressed, the protruding portion 323 and the deformable portion 533 at least partially overlap in a direction parallel to the moving direction (for example, the Z-axis direction) of the key cap 310, the deformable portion 533 and the optical transmission path have a first spatial relationship, and the optical signal received by the optical receiver 343 has a first intensity. When the key cap 310 is pressed, the key cap 310 drives the supporting mechanism 320 to move, so that the elastic member 332 is compressed and the protrusion 323 pushes against the deformable portion 533 to move, so that the deformable portion 533 and the light transmission path do not have the first spatial relationship any more, and the light signal received by the light receiver 343 has a second intensity different from the first intensity, so as to trigger the switch module 340 to generate the trigger signal.

In this embodiment, the first spatial relationship represents that the deformable portion 533 is far away from the optical transmission path, and the intensity of the optical signal received by the optical receiver 343 is not substantially changed by the deformable portion 533. When the deformable portion 533 and the optical transmission path no longer have the first spatial relationship, the deformable portion 533 enters the optical transmission path, and the deformable portion 533 attenuates the intensity of the optical signal received by the optical receiver 343, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 340 to generate the trigger signal.

Specifically, when the key cap 310 is pressed to move the supporting mechanism 320, the protruding portion 323 pushes against the connecting portion 5331 or the blocking portion 5332 of the deformable portion 533, so that the blocking portion 5332 is elastically deformed downward with the connecting portion 5331 and the connecting end of the lower housing 535 as a fulcrum, thereby at least partially blocking the optical signal, so that the second intensity is smaller than the first intensity. In one embodiment, when the key cap 310 is pressed to move the protruding portion 323, the deformable portion 533 can preferably completely block the optical signal, so that the optical signal is not received by the optical receiver 343 (i.e. the second intensity is zero). It should be noted that by changing the circuit design of the circuit board 341, the switch module 340 can generate the trigger signal according to the change of the light amount received by the optical receiver 343, and can also generate the trigger signal according to whether the optical receiver 343 receives the optical signal.

Fig. 25 to 27B are schematic diagrams of a tenth embodiment of the invention, in which fig. 25 is an exploded schematic diagram of an optical switch key according to the tenth embodiment of the invention, fig. 26 is a schematic diagram of an upper housing of the optical switch key of fig. 25, and fig. 27A and 27B are top plan views and perspective schematic diagrams of the optical switch key of fig. 25 without showing a keycap. As shown in fig. 25 to fig. 27B, the optical switch key 31' according to the tenth embodiment of the invention includes a key cap 310, a supporting mechanism 320, a restoring mechanism 530', a switch module 340 and a bottom plate 350, and the optical switch key 31' may further include a backlight source 360. The difference between the optical switch key 31 'of fig. 25 and the optical switch key 30' of fig. 13 is in the form of the deformable portion 538 of the upper case 534. Therefore, the structural details and the connection relationship of the rest of the components (such as the key cap 310, the supporting mechanism 320, the switch module 340, the bottom plate 350, the backlight source 360, etc.) of the optical switch key 31' and the corresponding structural details and the connection relationship between the recovery mechanism 530' and the recovery mechanisms 330, 330' can refer to the related descriptions of the optical switch key of the fifth or sixth embodiment, and are not repeated herein.

In this embodiment, the housing 531 'is formed by combining the upper housing 534 and the lower housing 535', and the deformable portion 538 is preferably a resilient arm extending from the upper housing 534 to the notch 3343 of the upper housing 534. As shown in fig. 26, the deformable portion 538 is preferably an elastic arm including a connecting portion 5381 and a blocking portion 5382. One end of the connection portion 5381 is connected to the upper housing 534, and the other end of the connection portion 5381 is connected to the shielding portion 5383. The connecting portion 5381 of the deformable portion 538 preferably has a rod-shaped portion or an arm-shaped portion with any suitable shape, wherein one end of the connecting portion 5381 is preferably connected to one of the right arm portion 3346 or the left arm portion 3345, and the other end of the connecting portion 5381 extends toward the other of the right arm portion 3346 or the left arm portion 3345 to connect with the shielding portion 5382 to form a free end of the deformable portion 538. For example, one end of the connecting portion 5381 of the deformable portion 538 is connected to the right arm portion 3346, and the other end of the connecting portion 5381 extends toward the left arm portion 3345 and partially corresponds to the opening of the notch portion 3343. The shielding portion 5382 is preferably connected transversely from the end of the connecting portion 5381 and extends downward in the Z-axis direction. Furthermore, the deformable portion 538 may be an elastic arm with any suitable shape according to practical applications, such that the deformable portion 538 has a free end corresponding to the protrusion 323 and a connection end connected to the upper housing 534, and the free end can be pushed by the protrusion 323 to be displaced (or elastically deformed) relative to the connection end. In one embodiment, the shielding portion 5382 of the deformable portion 538 preferably has a size that substantially completely shields the optical signal, but not limited thereto. In other embodiments, the shielding portion 5382 of the deformable portion 538 can at least partially shield the optical signal.

The operation of the optical switch key 31' according to the tenth embodiment of the present invention will be described with reference to fig. 27A and 27B. As shown in fig. 27A and 27B, when key cap 310 is not pressed, protruding portion 323 and deformable portion 538 at least partially overlap in a direction parallel to the moving direction of key cap 310 (e.g., the Z-axis direction), deformable portion 538 and the optical transmission path have a first spatial relationship, and the optical signal received by optical receiver 343 has a first intensity. When the key cap 310 is pressed, the key cap 310 drives the supporting mechanism 320 to move, so that the elastic member 332 is compressed and the protrusion 323 pushes the deformable portion 538 to move, so that the deformable portion 538 and the optical transmission path do not have the first spatial relationship any more, and the optical signal received by the optical receiver 343 has a second intensity different from the first intensity, so as to trigger the switch module 340 to generate the trigger signal.

In this embodiment, the first spatial relationship represents that the deformable portion 538 is far away from the optical transmission path (e.g., above the optical transmission path), and the deformable portion 538 does not substantially change the intensity of the optical signal received by the optical receiver 343. When the deformable portion 538 does not have the first spatial relationship with the optical transmission path any more, the deformable portion 538 enters the optical transmission path, and the deformable portion 538 attenuates the intensity of the optical signal received by the optical receiver 343, so that the second intensity is smaller than the first intensity, so as to trigger the switch module 340 to generate the trigger signal.

Specifically, when the keycap 310 is pressed to move the supporting mechanism 320, the protruding portion 323 pushes against the connecting portion 5381 or the shielding portion 5382 of the deformable portion 538, so that the shielding portion 5382 is elastically deformed downward with the connecting end of the connecting portion 5381 and the upper casing 534 as a fulcrum, and further at least partially blocks the optical signal, so that the second intensity is smaller than the first intensity. In one embodiment, when the key cap 310 is pressed to move the protruding portion 323, the deformable portion 538 preferably blocks the optical signal completely, so that the optical signal is not received by the optical receiver 343 (i.e. the second intensity is zero). It should be noted that by changing the circuit design of the circuit board 341, the switch module 340 can generate the trigger signal according to the change of the light amount received by the optical receiver 343, and can also generate the trigger signal according to whether the optical receiver 343 receives the optical signal.

It should be noted that, in the embodiment of fig. 1A to fig. 15B, the changing action portion 131 (or the protrusion 323) and the deformable portion have a corresponding first inclined surface and a corresponding second inclined surface, so that the deformable portion is pushed by the action portion 131 (or the protrusion 323) to be laterally displaced, but not limited thereto. In other embodiments, by changing the design of the action portion 131 (or the protrusion 323) and the deformable portion, only one of the action portion 131 (or the protrusion 323) and the deformable portion has a suitable inclined surface, and the deformable portion and the action portion 131 (or the protrusion 323) can move relatively along the inclined surface, so as to push the deformable portion to displace laterally. In the embodiment of fig. 16A to 27B, the action portion 131 (or the protrusion 323) and the deformable portion do not have corresponding slopes, so that the deformable portion moves along the movement path along with the action portion 131 or the protrusion 323 when being pushed by the action portion 131 or the protrusion 323. In the embodiment of fig. 16A to 27B, the deformable portion is pushed by the action portion 131 or the protrusion 323 to at least block the optical signal, but not limited thereto. In other embodiments, by changing the design of the deformable portion and the acting portion (or the protruding portion), when the optical switch key is at the non-pressed position, the portion of the deformable portion entering the optical transmission path is more or the amount of the blocked optical signal is more, and when the optical switch key is at the pressed position, the deformable portion is pushed by the acting portion (or the protruding portion) to displace downward, so that the amount of the optical signal blocked by the deformable portion is less, and further the intensity of the optical signal received by the optical receiver 153 is stronger (i.e. the second intensity is greater than the first intensity), and the trigger switch module 150 generates the trigger signal.

In addition, in the fifth, sixth, ninth and tenth embodiments, the protrusion 323 of the supporting mechanism 320 pushes against the deformable portion of the housing, but the invention is not limited thereto. In other embodiments, the design of the deformable portion may be changed, and the support of the supporting mechanism 320 may push against the deformable portion without providing a protrusion. Specifically, when the keycap is not pressed, the deformable portion may have a length extending below the supporting mechanism 320, such that when the keycap is pressed, the supporting mechanism 320 moves downward to push the deformable portion to move, so as to change the intensity of the optical signal received by the optical receiver. For example, when the key cap is not pressed, the deformable portion substantially overlaps at least part of a vertical projection of the key cap end of the inner support 321 of the supporting mechanism 320 on the bottom plate, i.e., the deformable portion extends to below the key cap end of the inner support 321. Therefore, when the key cap is pressed and the supporting mechanism 320 moves downward, the key cap end of the inner support 321 can push against the deformable portion to move, so as to change the intensity of the optical signal received by the optical receiver. Furthermore, according to practical applications, the inner edge of the cap end of the inner support 321 and the deformable portion may or may not have corresponding slopes, so that when the key cap is pressed, the inner support 321 pushes the deformable portion to laterally displace or directly displace downward.

The above detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the scope of the present invention by the preferred embodiments disclosed above. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims. The scope of the invention is therefore to be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the scope of the appended claims.

Claims (20)

1. An optical switch key, comprising:

a housing having a deformable portion;

the movable shaft is movably arranged in the shell and can move up and down along a movement path to a non-pressed position and a pressed position in response to the pressing force; and

the switch module comprises a circuit board, an optical transmitter and an optical receiver, wherein the optical transmitter and the optical receiver are electrically connected with the circuit board, the optical transmitter transmits an optical signal, and the optical signal reaches the optical receiver along an optical transmission path;

wherein the deformable part extends inwards from the wall surface of the shell, the deformable part is positioned at the side of the interfered path of the light transmission path, and the long axis of the deformable part is not perpendicular to the interfered path of the light transmission path;

when the movable shaft moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft moves along the movement path to push the deformable part to locally move laterally, so that the optical signal received by the optical receiver is changed to trigger the switch module to generate a trigger signal.

2. The optical switch key of claim 1, wherein: when the movable shaft is located at the non-pressed position, the deformable part enters less part of the optical transmission path, the deformable part blocks the optical signal with low quantity, and the optical signal received by the optical receiver has first intensity; when the movable shaft is located at the pressing position, the local lateral movement of the deformable part is far away from the movement path, the deformable part enters the light transmission path in a large amount, the deformable part blocks the light signal quantity to be high, and the light signal received by the light receiver has a second intensity, so that the second intensity is smaller than the first intensity.

3. The optical switch key of claim 1, wherein: the movable shaft is provided with an acting part which protrudes along the motion path and corresponds to the deformable part, and when the movable shaft is positioned at the non-pressing position, the acting part and the deformable part at least partially overlap in a direction parallel to the motion path; when the movable shaft moves along the motion path to push the deformable part to locally move laterally, the acting part is at least partially contacted with the deformable part in a direction perpendicular to the motion path.

4. An optical switch key as defined in claim 3, wherein: the acting part is provided with a first inclined surface, the deformable part is provided with a second inclined surface, the first inclined surface corresponds to the second inclined surface, and when the movable shaft moves along the motion path, the first inclined surface moves relative to the second inclined surface so as to enable the deformable part to locally generate lateral movement.

5. An optical switch key as defined in claim 3, wherein: the circuit board further has an avoidance space, and when the movable shaft is located at the pressing position, the end of the acting portion exceeds the deformable portion and enters the avoidance space.

6. The optical switch key of claim 1, wherein: the optical switch key also comprises an elastic piece, the elastic piece is arranged in the shell and coupled with the movable shaft, and when the pressing force is removed, the elastic piece enables the movable shaft to return to the non-pressing position; the shell is formed by combining an upper shell and a lower shell, the upper shell is provided with a through hole and an upper clamping part, the movable shaft is movably inserted into the through hole to position the elastic piece, the lower shell is provided with a lower clamping part, and the lower clamping part is used for clamping with the upper clamping part so that the upper shell is connected with the lower shell;

the deformable part is arranged on the lower shell; alternatively, the deformable portion is provided to the upper case.

7. The optical switch key of claim 1, wherein: the shell further comprises a grating part, the grating part is provided with a grating hole and is positioned between the light emitter and the light receiver, the deformable part is provided with a horizontal extension shaft, and when the movable shaft is positioned at the non-pressing position, the horizontal extension shaft does not pass through the grating hole; the horizontally extending shaft passes through the grating aperture when the deformable portion is moved laterally away from the motion path.

8. The optical switch key of claim 1, wherein: the circuit board is further provided with a positioning hole, the shell is provided with a positioning column, and the positioning column is inserted into the positioning hole so as to position the shell on the circuit board.

9. An optical switch key as defined in claim 1, wherein: the optical switch key further comprises an elastic piece, a light guide column and a backlight light source, wherein the elastic piece is arranged in the shell and coupled with the movable shaft, and when the pressing force is removed, the elastic piece enables the movable shaft to return to the non-pressing position; the light guide column is arranged in the shell corresponding to the elastic piece, and the backlight light source is electrically connected with the circuit board corresponding to the light guide column so as to provide light rays to be emitted towards the movable shaft.

10. An optical switch key, comprising:

a housing;

the movable shaft is movably arranged on the shell and can move up and down along a movement path to a non-pressed position and a pressed position in response to the pressing force;

the switch module comprises a circuit board, an optical transmitter and an optical receiver, wherein the optical transmitter and the optical receiver are electrically connected with the circuit board, the optical transmitter transmits an optical signal, and the optical signal reaches the optical receiver along an optical transmission path; and

a shielding member disposed at the side of the interfered path of the light transmission path, wherein the direction of the shielding member extending from the wall surface of the housing is not perpendicular to the interfered path of the light transmission path,

when the movable shaft moves from the non-pressed position to the pressed position in response to the pressing force, the movable shaft drives the shielding member to move laterally, so that the optical signal received by the optical receiver is changed to trigger the switch module to generate a trigger signal.

11. An optical switch key as recited in claim 10, wherein: when the movable shaft is located at the non-pressing position, the part of the shielding piece entering the optical transmission path is less, the shielding piece blocks the optical signal to be low, and the optical signal received by the optical receiver is of a first intensity; when the movable shaft is located at the pressing position, the shielding piece moves laterally away from the moving path, the shielding piece enters the light transmission path in a large amount, the shielding piece blocks the light signal quantity, and the light signal received by the light receiver has a second intensity, so that the second intensity is smaller than the first intensity.

12. The optical switch key of claim 10, wherein: when the movable shaft is located at the non-pressed position, the shielding piece is located in the optical transmission path, the shielding piece blocks the optical signal, and the optical signal received by the optical receiver has a first intensity; when the movable shaft is located at the pressing position, the shielding piece moves laterally away from the optical transmission path, and the optical signal received by the optical receiver has a second intensity, so that the second intensity is greater than the first intensity.

13. The optical switch key of claim 10, wherein: the shell further comprises a grating part, the grating part is provided with a grating hole and is positioned between the light emitter and the light receiver, and the shielding part is provided with a shielding part which selectively shields the grating hole relative to the light emitting part corresponding to the movement of the movable shaft.

14. An optical switch key, comprising:

a keycap;

the supporting mechanism is arranged below the keycap and supports the keycap to move up and down;

the restoring mechanism is arranged below the keycap to provide restoring force so that the keycap is restored to the position before pressing after pressing, and the restoring mechanism comprises a shell which is provided with a deformable part; and

a switch module including a circuit board, a light emitter and a light receiver, the light emitter and the light receiver are electrically connected to the circuit board, the light emitter emits a light signal corresponding to the light receiver, the deformable portion is located beside an interfered path of a light transmission path, a long axis of the deformable portion is not perpendicular to the interfered path of the light transmission path,

when the keycap is pressed, the keycap drives the supporting mechanism to move, so that the supporting mechanism pushes the deformable part to move laterally to change the optical signal received by the optical receiver, and the switch module is triggered to generate a trigger signal.

15. An optical switch button as defined in claim 14, wherein: the supporting mechanism comprises an inner support and an outer support, the inner support is pivoted on the inner side of the outer support to form a scissor-type supporting mechanism, and the supporting mechanism is provided with a protruding part which extends and protrudes from the inner support towards the inner side direction of the inner support.

16. The optical switch key of claim 15, wherein: when the keycap is not pressed, the optical signal received by the optical receiver has a first intensity; when the keycap is pressed to drive the supporting mechanism to move, the protruding portion pushes the deformable portion to move so as to at least partially block the optical signal, so that the optical signal received by the optical receiver has a second intensity, and the second intensity is smaller than the first intensity.

17. An optical switch key as recited in claim 15, wherein: when the keycap is not pressed, the protruding portion and the deformable portion at least partially overlap in a direction parallel to a moving direction of the keycap; when the keycap is pressed, the protruding part pushes the deformable part to move laterally, and the protruding part and the deformable part are at least partially contacted in the moving direction perpendicular to the keycap.

18. An optical switch key as recited in claim 15, wherein: the protruding portion has a first inclined surface, the deformable portion has a second inclined surface, the first inclined surface corresponds to the second inclined surface, and when the keycap drives the supporting mechanism to move, the first inclined surface moves relative to the second inclined surface, so that the deformable portion moves laterally.

19. The optical switch key of claim 14, wherein: the shell is formed by combining an upper shell and a lower shell, the upper shell is provided with an upper clamping part, the lower shell is provided with a lower clamping part, and the lower clamping part is used for clamping with the upper clamping part so as to enable the upper shell to be connected with the lower shell;

the deformable part is arranged on the lower shell; alternatively, the deformable portion is provided to the upper case.

20. An optical switch key as recited in claim 19, wherein: the shell further comprises a grating part, the grating part is located between the light emitter and the light receiver, and when the keycap is pressed, the support mechanism pushes the deformable part to move so as to change the relative position of the deformable part and the grating part.

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