CN111696812A - Photoelectric induction type key switch and keyboard - Google Patents

Abstract

The invention belongs to the technical field of keyboards, and in particular relates to a photoelectric inductive key switch and a keyboard. The photoelectric inductive key switch includes a circuit board, a photosensitive component and a pressing component. When the pressing component is pressed, the shading member can move relative to the light-receiving surface of the photosensitive component to change the light-receiving amount of the photosensitive component, so as to change the photocurrent signal of the photosensitive component; the circuit board has a controller, and the controller is electrically connected to the photosensitive component , the controller is used to receive the photocurrent signal and output the execution signal corresponding to the value of the photocurrent signal, so that the user can arbitrarily set the trigger point of the button between the maximum luminous flux and the minimum luminous flux of the photosensitive component, so as to meet the needs of the user. Arbitrarily set, realize the control function of the button with a specific function relationship without segment, even if the setting of the button contact is not restricted, it is extremely convenient to use.

Description

Photoelectric induction key switch and keyboard

technical field

The invention belongs to the technical field of keyboards, and in particular relates to a photoelectric induction key switch and a keyboard.

Background technique

Gaming players generally like to use linearized key switches. Linear key switches in the prior art are usually resistive. The principle is that a conductor is arranged in the key switch. The resistance of the conductor changes, thereby achieving a change in the electrical signal loaded on this conductor. This resistive linear switch realizes the linear function of the key switch by pushing the conductor in the key switch to deform and displace by external force, so that the key contacts provided by the key switch are greatly restricted. Moreover, as the number of times of use increases, the conductors in the key switch will be worn, deformed and greatly different from the original state, resulting in insensitive contact of the key switch or a non-conductive state, resulting in a limited service life of the key switch.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a photoelectric inductive key switch and a keyboard, which aims to solve the technical problem that the key contacts are limited during the use of the linear key switch in the prior art.

In order to achieve the above purpose, the technical solution adopted in the present invention is: a photoelectric induction key switch, comprising a circuit board, a photosensitive component and a pressing component, the pressing component has a light shielding member, and the light shielding member and the photosensitive component receive light. The surfaces are arranged at intervals; when the pressing component is pressed, the light-shielding member can move relative to the light-receiving surface of the photosensitive component to change the light-receiving amount of the photosensitive component, so that the photocurrent signal of the photosensitive component changes; so The circuit board has a controller, the controller is electrically connected with the photosensitive component, and the controller is used for receiving the photocurrent signal and outputting an execution signal corresponding to the value of the photocurrent signal.

Optionally, an end of the light shielding member facing the photosensitive component is provided with a first light shielding cavity that communicates with the outside world.

Optionally, the photoelectric inductive key switch further includes a casing, the pressing component is movably mounted on the casing to drive the shading member to move relative to the light-receiving surface of the photosensitive component, and the casing is provided with a casing. There is a light-transmitting area where light is incident toward the photosensitive component, a second light-shielding cavity is arranged on the casing, and an end of the second light-shielding cavity facing the light-transmitting area is provided with a light-transmitting opening, and the photosensitive component It is located in the second light-shielding cavity, and the light-receiving surface of the photosensitive component faces the light-transmitting opening.

Optionally, the pressing component includes a pressing member and an elastic member, a pressing cavity is provided on the housing, the pressing member is installed in the pressing cavity, and the elastic member abuts against the pressing cavity. Between the cavity wall of the pressing cavity and the pressing member, the light shielding member is arranged on the pressing member.

Optionally, the housing includes a light-shielding case and a light-transmitting case mounted on the light-shielding case, the second light-shielding cavity is provided on the light-shielding case, and the light-transmitting case is transparent to form the transparent case. light area.

Optionally, the photoelectric switch button further includes an LED light, the LED light is mounted on the circuit board and is electrically connected to the circuit board, and the LED light emits light toward the light-transmitting case.

Optionally, the light-shielding shell is provided with a light-guiding cavity, and an end of the light-guiding cavity facing the light-transmitting shell is provided with a light-guiding opening, and the LED lamp is located in the light-guiding cavity and passes through the light-guiding cavity. The light opening emits light toward the light-transmitting shell.

Optionally, the photosensitive component includes a photosensitive element, the photosensitive element is mounted on the circuit board and is electrically connected to the circuit board, and the photosensitive element is located in the second light-shielding cavity.

Optionally, the photosensitive assembly further includes a light guide member, the light guide member is disposed on the photosensitive element and used to guide the light from the light-transmitting opening to enter the photosensitive element.

The beneficial effects of the photoelectric inductive key switch provided by the embodiment of the present invention: when the pressing component is not pressed, the light flux received by the photosensitive component is the largest; after the light shielding member completely blocks the light receiving surface of the photosensitive component, the light flux received by the photosensitive component is the smallest . When the pressing component is pressed, the shading member moves downward so that the luminous flux directed to the photosensitive component gradually decreases from the initial maximum value to the minimum value, so that the photocurrent signal on the photosensitive component also gradually decreases from the maximum value to the minimum value. Therefore, in the electrical path loop formed by the electrical connection between the photosensitive component and the controller, the controller can obtain a set of photocurrent signals corresponding to the stroke size of the key switch when it is pressed. Then, by detecting and reading this group of photocurrent signals with specific changing characteristics, the controller can realize a group of execution signals with corresponding changes to control the function output of the key switch, so that the user can control the maximum luminous flux and the minimum luminous flux of the photosensitive component. The trigger point of the button can be arbitrarily set between the values, so that it can be arbitrarily set according to the needs of the user, and the control function of the button with a specific function relationship can be realized without a segment, even if the setting of the button contact is not limited, it is extremely convenient to use.

Different from the resistive linear key switch, which realizes the linear key switch function by pushing the conductor in the key switch to deform and shift by external force, the photoelectric inductive key switch realizes the linear key switch function only by controlling the amount of light flux received by the photosensitive component. Yes, there is no photosensitive component in the key switch that is damaged and fails due to wear and deformation during the pressing or bouncing of the key switch, so that the service life of the key switch is longer.

Another technical solution provided by the embodiment of the present invention is a keyboard, comprising the above-mentioned photoelectric induction key switch.

In the keyboard of the embodiment of the present invention, since the above-mentioned photoelectric induction key switch is used, the photosensitive component can realize different key triggering functions when receiving different luminous fluxes, so that the user can adjust the maximum luminous flux and the minimum luminous flux of the photosensitive component between the maximum luminous flux and the minimum luminous flux. The trigger point of the button can be arbitrarily set between the buttons to realize the stepless linear control function of the button. In e-sports games, gamers can arbitrarily set the pressing stroke of the button as the trigger stroke of the switch according to their own needs. The button has high sensitivity, good user experience, simple structure and low production cost.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a photoelectric inductive key switch provided by an embodiment of the present invention;

Fig. 2 is the sectional structure schematic diagram of the photoelectric induction key switch in the normal state in Fig. 1;

3 is a schematic cross-sectional structure diagram of the photoelectric inductive key switch in a pressed state in FIG. 1;

4 is a schematic cross-sectional structure diagram of the photoelectric inductive key switch in a fully pressed state in FIG. 1;

Fig. 5 is the exploded structure schematic diagram of photoelectric induction key switch in Fig. 1;

Fig. 6 is the structural representation of the light-shielding shell of the photoelectric induction key switch in Fig. 5;

FIG. 7 is a schematic structural diagram of the push member of the photoelectric induction key switch in FIG. 5 .

Among them, each reference sign in the figure:

10—shell;

11—light-shielding shell; 12-light-transmitting shell; 13-light-transmitting area; 14-second light-shielding cavity; 15-light-guiding cavity; 16-pressing cavity; 17-guide piece; 18-ring sleeve; 141-transparent Light opening; 151—light guide opening; 171—guide cavity;

20—circuit board;

30—photosensitive components;

31—photosensitive element; 32—light guide;

40—pressing assembly;

41—shading part; 42—pressing part; 43—elastic part; 411—first shading cavity;

50—LED lights.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to FIGS. 1 to 7 are exemplary, and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than An indication or implication that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, is not to be construed as a limitation of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

As shown in FIGS. 2 , 3 and 4 , the photoelectric inductive key switch provided by the embodiment of the present invention will now be described. The photoelectric inductive key switch includes a circuit board 20, a photosensitive component 30 and a pressing component 40. The pressing component 40 has a shading member 41, and the shading member 41 is spaced from the light-receiving surface of the photosensitive component 30; when the pressing component 40 is pressed, the shading member 41 It can move relative to the light-receiving surface of the photosensitive component 30 to change the amount of light received by the photosensitive component 30 (ie, the luminous flux directed to the photosensitive component 30), so as to change the photocurrent signal of the photosensitive component 30; the circuit board 20 has a controller, and the controller and the photosensitive component The component 30 is electrically connected, and the controller is used for receiving the photocurrent signal and outputting an execution signal corresponding to the value of the photocurrent signal.

Compared with the prior art, in the photoelectric inductive key switch provided by the embodiment of the present invention, when the pressing component 40 is not pressed, the light flux received by the photosensitive component 30 is the largest; , the light flux received by the photosensitive component 30 is the smallest. When the pressing component 40 is pressed, the light shielding member 41 moves downward, so that the light flux directed to the photosensitive component 30 gradually decreases from the initial maximum value to the minimum value, so that the photocurrent signal on the photosensitive component 30 also gradually decreases from the maximum value. The controller can obtain a set of photocurrent signals corresponding to the stroke size of the key switch when the key switch is pressed in the electrical path loop formed by the electrical connection between the photosensitive component 30 and the controller. Then, by detecting and reading this group of photocurrent signals with specific changing characteristics, the controller can realize a group of correspondingly changing execution signals to control the function output of the key switch, so that the user can control the maximum luminous flux and luminous flux of the photosensitive component 30. The trigger point of the button can be arbitrarily set between the minimum values, so that it can be arbitrarily set according to the needs of the user, and the control function of the button with a specific function relationship can be realized.

Wherein, the change of the luminous flux received on the photosensitive component 30 and the change of the photocurrent signal generated on the photosensitive component 30 form a one-to-one correspondence to form a functional relationship, and further, the photocurrent signal generated on the photosensitive component 30 and the execution signal output by the controller form One-to-one corresponding function relationship, so as to realize the control function of the key switch, the function relationship can be linear change, or curve change, that is, it can realize the stepless linear control of the key switch, or the curve control. The controller can be an MCU module.

In specific applications, for example, when the user needs to improve the sensitivity of the button, a specific pressing stroke can be set as the button trigger point to realize the button function, instead of completely pressing the button to realize the button function, so that the user can easily and quickly realize the button function. Complete the key function, effectively improve the speed of key input. Or, during the pressing process, set a number of button trigger points at any position within the pressing stroke as required, so that the user can press different strokes according to their needs to realize the corresponding button function, which can greatly meet the needs of e-sports. Competitive usage needs of users.

Different from the resistive linear key switch, which realizes the linear key switch function by pushing the conductor in the key switch to deform and displace by external force, the photoelectric inductive key switch of the embodiment of the present invention only controls the light flux of the photosensitive component 30 by controlling the size of the light flux. In order to realize the key switch function with a specific functional relationship, there is no photosensitive component 30 in the key switch that is worn, deformed and damaged during the process of pressing or popping up the key switch, so that the key switch has a longer service life.

Since the photoelectric inductive key switch of the embodiment of the present invention can directly receive the light from the outside world, it is not necessary to provide an additional light-emitting device such as an LED to provide a light source, so that the structure of the key is simpler and more compact, which is beneficial to the development of the miniaturization of the key, and the manufacturing cost is lower. .

In another embodiment of the present invention, as shown in FIGS. 2 , 4 and 7 , the end of the light shielding member 41 facing the photosensitive component 30 is provided with a first light shielding cavity 411 that communicates with the outside world. Specifically, the shading member 41 moves synchronously with the keys and is used to block the luminous flux directed to the light-receiving surface of the photosensitive assembly 30. By setting the first shading cavity 411 on the shading member 41, when the user presses the button, the first shading cavity 411 is set. 411 blocks the luminous flux of the external light to the photosensitive component 30, so that the user can control the luminous flux of the external light to the photosensitive component 30 by pressing the button, so as to realize different button functions. Further, light-blocking paint can be applied on the cavity wall of the first light-shielding cavity 411 to make the light-shielding effect of the first light-shielding cavity 411 better, such as black painting, purple painting, brown painting, etc. , set as required.

In another embodiment of the present invention, as shown in FIGS. 1 , 2 and 3 , the photoelectric inductive key switch further includes a housing 10 , and the pressing component 40 is movably mounted on the housing 10 to drive the light shielding member 41 to face the photosensitive component 30 . The housing 10 is provided with a light-transmitting area 13 for incident light toward the photosensitive component 30, the housing 10 is provided with a second light-shielding cavity 14, and the end of the second light-shielding cavity 14 facing the light-transmitting area 13 is provided with The light-transmitting opening 141 , the photosensitive component 30 is located in the second light-shielding cavity 14 , and the light-receiving surface of the photosensitive component 30 faces the light-transmitting opening 141 . Specifically, the light-transmitting area 13 of the housing 10 can receive external light, and the cavity wall of the second light-shielding cavity 14 is used to block the light, so that the light-transmitting opening 141 is the only way for the light to enter the second light-shielding cavity 14, and the light-shielding cavity 14 is blocked from light. The light-shielding element 41 can block the angle of the light from the light-transmitting opening 141 to the light-receiving surface of the photosensitive component 30, so that the light-shielding element 41 continuously reduces the angle of the external light emitting to the light-transmitting opening 141 during the process of moving toward the light-transmitting opening 141. , that is, the angle at which the outside light can enter the light-transmitting opening 141 is continuously reduced, so as to control the luminous flux of the outside light to the photosensitive component 30, and realize the stepless linear control function of the key, which is extremely convenient to use. Further, light-blocking paint can be painted on the cavity wall of the second light-shielding cavity 14 to make the light-shielding effect of the second light-shielding cavity 14 better, such as black painting, purple painting, brown painting, etc. , set as required.

In another embodiment of the present invention, as shown in FIGS. 2 , 3 and 4 , the pressing component 40 includes a pressing member 42 and an elastic member 43 , the housing 10 is provided with a pressing cavity 16 , and the pressing member 42 is installed on the In the pressing cavity 16 , the elastic member 43 abuts between the cavity wall of the pressing cavity 16 and the pressing member 42 , and the light shielding member 41 is arranged on the pressing member 42 . Specifically, the pressing cavity 16 is located at the side of the second light-shielding cavity 14 and extends in the same direction as the second light-shielding cavity 14 . The pressing cavity 16 can guide the pressing member 42 to move in a direction perpendicular to the light-transmitting opening 141 , thereby Guide the shading member 41 to move close to or away from the transparent opening 141 ; in the initial state, the pressing member 42 drives the shading member 41 to be positioned above the transparent opening 141 under the elastic force of the elastic member 43 , and the external light can pass through the transparent opening 141 Then, when the pressing member 42 is pressed, the spring is pressed, the pressing member 42 moves down along the pressing cavity 16, and the shading member 41 moves toward the light-transmitting opening 141 and gradually blocks the external light from The light-transmitting opening 141 is used to change the luminous flux of the photosensitive component 30 to receive external light, so as to realize different key functions. The elastic member 43 can be a spring, a torsion spring or an elastic sheet, etc., which can be set as required.

In another embodiment of the present invention, as shown in FIGS. 1 , 2 and 5 , the housing 10 includes a light-shielding shell 11 and a light-transmitting shell 12 mounted on the light-shielding shell 11 , and the second light-shielding cavity 14 is provided in the light-shielding shell 11 . Above, the light-transmitting shell 12 is transparent to form a light-transmitting area 13 . Specifically, the light-shielding case 11 is an opaque case, and the light-transmitting case 12 is a transparent case. The photosensitive assembly 30 can only receive external light through the light-transmitting opening 141; then, by disposing the light-transmitting shell 12 on the light-shielding shell 11, the light-transmitting shell 12 can naturally pass through the external light, so that the light-transmitting opening 141 is not used. When the first light-shielding cavity 411 is completely blocked, the external light is naturally directed to the photosensitive component 30, and no additional light source is required, which effectively simplifies the structure of the button and saves the manufacturing cost of the button.

In another embodiment of the present invention, as shown in FIGS. 2 , 3 and 4 , the photoelectric switch button further includes an LED light 50 . The LED light 50 is mounted on the circuit board 20 and is electrically connected to the circuit board 20 . The LED light 50 The light is emitted toward the light-transmitting casing 12 . Specifically, by arranging the LED lamp 50 on the circuit board 20 , the LED lamp 50 can emit light toward the light-transmitting casing 12 when the LED lamp 50 is turned on, so that the light-transmitting casing 12 can collect the light from the LED lamp 50 to illuminate the on the photosensitive component 30 to ensure that the photosensitive component 30 is not affected by the intensity of external natural light, so as to maintain the sensitivity of the photosensitive component 30 . In addition, the LED light 50 can be set to various kinds of colorful lights as required, so that the light irradiates on the light-transmitting shell 12 to form a good decorative effect, and provides a good visual experience for the user.

In another embodiment of the present invention, as shown in FIGS. 2 and 6 , the light-shielding shell 11 is provided with a light-guiding cavity 15 , and one end of the light-guiding cavity 15 facing the light-transmitting shell 12 is provided with a light-guiding opening 151 , and the LED lamp 50 It is located in the light guide cavity 15 and emits light toward the light-transmitting case 12 through the light guide opening 151 . Specifically, by disposing the light guide cavity 15 on the light shielding case 11, covering the LED lamp 50 in the light guide cavity 15, and then directionally emitting the light of the LED lamp 50 to the light transmitting case 12 through the light guide opening 151, the realization of The light emitted by the LED lamp 50 is effectively controlled, the random scattering of the light of the LED lamp 50 is avoided, and the irradiation effect on the light-transmitting casing 12 is enhanced.

In another embodiment of the present invention, as shown in FIGS. 2 , 3 and 4 , the photosensitive component 30 includes a photosensitive element 31 , the photosensitive element 31 is mounted on the circuit board 20 and is electrically connected to the circuit board 20 , and the photosensitive element 31 is located in the circuit board 20 . inside the second light-shielding cavity 14 . Specifically, the photosensitive element 31 is used to receive light from the light-transmitting opening 141 , the photosensitive element 31 converts the received light signal into a photocurrent signal, and the photosensitive element 31 communicates with the controller on the circuit board 20 through the emitted photocurrent signal. In the electrical path, the controller collects the photocurrent signal on the photosensitive element 31 to obtain the corresponding execution signal, so as to control the different button functions of the button through the change of the execution signal, and realize the control of the button function output, which is extremely convenient to use.

In another embodiment of the present invention, as shown in FIGS. 2 , 3 , and 4 , the photosensitive assembly 30 further includes a light guide member 32 , and the light guide member 32 is disposed on the photosensitive element 31 and used to guide the light from the light transmission opening 141 to emit light. onto the photosensitive element 31 . Specifically, the light guide 32 is disposed in the second light-shielding cavity 14 and between the light-transmitting opening 141 and the photosensitive element 31, so as to guide the light at the light-transmitting opening 141 to the photosensitive element 31, so that the photosensitive element 31 can The light at the light-transmitting opening 141 is better received to ensure the sensitivity of the photosensitive element 31 . Wherein, by arranging an annular sleeve 18 on the light-shielding shell 11, part of the light guide member 32 is accommodated in the annular sleeve 18, and the opening of the annular sleeve 18 toward one end of the light-shielding member 41 forms a light-transmitting opening 141, so that When the light-shielding member 41 is pressed and moved, the first light-shielding cavity 411 can be directly covered on the outer circumference of the annular sleeve 18 to control the luminous flux of light entering the light-transmitting opening 141 , and the use effect is good.

An embodiment of the present invention also provides a keyboard, including the above-mentioned photoelectric inductive key switch.

In the keyboard of the embodiment of the present invention, since the above-mentioned photoelectric inductive key switch is used, when the photosensitive component 30 receives different luminous fluxes, different key triggering functions can be realized, so that the user can control the maximum luminous flux and the minimum luminous flux of the photosensitive component 30. The trigger point of the button can be arbitrarily set between the luminous flux to realize the stepless linear control function of the button. In e-sports games, gamers can arbitrarily set the pressing stroke of the button as the trigger stroke of the switch according to their own needs. The button has high sensitivity, good user experience, simple structure and low production cost.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. A photoelectric induction type key switch is characterized in that: the pressing component is provided with a light shielding piece, and the light shielding piece and the light receiving surface of the photosensitive component are arranged at intervals; when the pressing component is pressed, the light shielding component can move relative to the light receiving surface of the photosensitive component to change the light receiving amount of the photosensitive component, so that the photocurrent signal of the photosensitive component changes; the circuit board is provided with a controller, the controller is electrically connected with the photosensitive assembly, and the controller is used for receiving the photocurrent signal and outputting an execution signal corresponding to the numerical value of the photocurrent signal.

2. The photoelectric sensing type key switch according to claim 1, wherein: one end of the shading piece, which faces the photosensitive assembly, is provided with a first shading cavity communicated with the outside.

3. The photoelectric sensing type key switch according to claim 2, wherein: the photoelectric sensing type key switch further comprises a shell, the pressing component is movably mounted on the shell to drive the shading component to move relative to the light receiving surface of the photosensitive component, a light transmitting area which emits light towards the photosensitive component is arranged on the shell, a second shading cavity is arranged on the shell, a light transmitting opening is formed in one end, facing the light transmitting area, of the second shading cavity, the photosensitive component is located in the second shading cavity, and the light receiving surface of the photosensitive component faces the light transmitting opening.

4. The photoelectric sensing type key switch according to claim 3, wherein: the pressing assembly comprises a pressing piece and an elastic piece, a pressing cavity is formed in the shell, the pressing piece is installed in the pressing cavity, the elastic piece abuts against the cavity wall of the pressing cavity and between the pressing piece, and the shading piece is arranged on the pressing piece.

5. The photoelectric sensing type key switch according to claim 4, wherein: the shell comprises a shading shell and a light-transmitting shell arranged on the shading shell, the second shading cavity is arranged on the shading shell, and the light-transmitting shell is formed in a transparent shape and forms the light-transmitting area.

6. The photoelectric sensing type key switch according to claim 5, wherein: the photoelectric switch key further comprises an LED lamp, the LED lamp is mounted on the circuit board and electrically connected with the circuit board, and the LED lamp faces the light transmitting shell to emit light.

7. The photoelectric sensing type key switch according to claim 6, wherein: the LED lamp is characterized in that a light guide cavity is arranged on the shading shell, a light guide opening is formed in one end, facing the light transmitting shell, of the light guide cavity, and the LED lamp is located in the light guide cavity and faces the light transmitting shell through the light guide opening to emit light.

8. The photoelectric induction type key switch according to any one of claims 3 to 7, wherein: the photosensitive assembly comprises a photosensitive element, the photosensitive element is mounted on the circuit board and electrically connected with the circuit board, and the photosensitive element is located in the second shading cavity.

9. The photoelectric sensing type key switch according to claim 8, wherein: the photosensitive component further comprises a light guide part, and the light guide part is arranged on the photosensitive element and used for guiding the light rays of the light-transmitting opening to be emitted into the photosensitive element.

10. A keyboard, comprising: the photoelectric induction type key switch comprises the photoelectric induction type key switch of any one of claims 1 to 9.

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