CN212485185U

CN212485185U - Key and keyboard

Info

Publication number: CN212485185U
Application number: CN202020965204.XU
Authority: CN
Inventors: 黄祖金
Original assignee: Shenzhen Source Lung Optical Technology Co ltd
Current assignee: Shenzhen Source Lung Optical Technology Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-02-05
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a button and keyboard. Wherein the key comprises a light emitter; the optical receiver is arranged at a distance from the optical transmitter; the base is provided with a light-transmitting part and a reflecting part, the light-transmitting part and the reflecting part are arranged corresponding to the light emitter, and the reflecting part can transmit the optical signal emitted by the light emitter to the light receiver; the pressing mechanism comprises a pressing component and a light blocking piece, the pressing component is movably arranged on the base and covers the light transmission part, and the light transmission part can transmit an optical signal emitted by the optical emitter to the pressing mechanism; the light blocking member is connected to the pressing member, and when the pressing member is driven, the light blocking member may conduct or block a light path between the reflection portion and the light receiver. The utility model discloses technical scheme has reduced the manufacturing cost of keyboard.

Description

Key and keyboard

Technical Field

The utility model relates to a keyboard technical field, in particular to keyboard of button and applied this button.

Background

At present, keys of a keyboard in the related art can realize key functions through light paths, and can also realize illumination of the keys through the light paths. Specifically, when the key is pressed, the key function is realized by the conduction or the interruption of the optical path between the reflection part light emitter and the reflection part light receiver, and the illumination of the key is realized by the conduction of the optical path of the second light emitter. However, the realization of the functions and illumination by the keys of the keyboard-like device requires the corresponding arrangement of the light emitter, and the number of the keys on the keyboard is large. This results in a relatively large number of light emitters, which results in a relatively complex keyboard structure and increased manufacturing costs.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide a key, which is intended to reduce the manufacturing cost of the keyboard.

In order to achieve the above object, the present invention provides a key comprising:

a light emitter;

the optical receiver is arranged at a distance from the optical transmitter;

the base is provided with a light-transmitting part and a reflecting part, the light-transmitting part and the reflecting part are arranged corresponding to the light emitter, and the reflecting part can transmit the optical signal emitted by the light emitter to the light receiver; and

the pressing mechanism comprises a pressing component and a light blocking piece, the pressing component is movably arranged on the base and covers the light transmission part, and the light transmission part can transmit an optical signal emitted by the optical emitter to the pressing mechanism; the light blocking member is connected to the pressing member, and when the pressing member is driven, the light blocking member may conduct or block a light path between the reflection portion and the light receiver.

In an embodiment of the present invention, the base has two opposite sides, the base is provided with a first light hole and a relief hole penetrating through the two opposite sides of the base, the first light hole forms the light-transmitting portion, the reflection portion is disposed on one of the two opposite sides of the base and partially disposed in the first light hole;

the light emitter and the light receiver are positioned on one side of the base facing the reflection part;

the pressing component is located on one side, deviating from the reflecting portion, of the base, and when the pressing component is driven, the light blocking piece can penetrate through the yielding hole to block a light path between the reflecting portion and the light receiver.

In an embodiment of the present invention, a light-gathering boss is disposed on a side of the base facing the light emitter, the light-gathering boss surrounds the light emitter and is provided with a light-avoiding hole penetrating through an inner side and an outer side of the light-gathering boss, and the light-avoiding hole and the light receiver are disposed oppositely;

the reflecting part is positioned in the light-gathering boss.

In an embodiment of the present invention, the base faces one side of the light emitter and is further provided with a reflection plate, the reflection plate forms the reflection portion, the reflection plate is connected to the inner side wall of the light-gathering boss, and the reflection plate has a reflection surface.

In an embodiment of the present invention, the key further includes a light guide member, and the light guide member is at least partially embedded in the first light hole.

In an embodiment of the present invention, a holding cavity having a cavity opening is formed on a side of the base facing the pressing component, and the first light-transmitting hole and the passing hole are both disposed on a cavity bottom wall of the holding cavity;

the pressing component is movably arranged in the accommodating cavity and is abutted against the cavity side wall of the accommodating cavity; the light blocking member is connected to one side of the pressing assembly facing the cavity bottom wall of the accommodating cavity.

In an embodiment of the present invention, the pressing assembly includes a pressing member and a key cap;

the pressing piece is movably arranged in the accommodating cavity and is provided with a second light hole penetrating through one side of the pressing piece facing the cavity bottom wall of the accommodating cavity and one side of the pressing piece deviating from the cavity bottom wall of the accommodating cavity, and the second light hole and the first light hole are oppositely arranged;

the keycap is arranged on one side of the pressing piece, which is far away from the bottom wall of the cavity of the containing cavity, and covers the second light-transmitting hole;

the light blocking piece is connected to one side, facing the cavity bottom wall of the accommodating cavity, of the pressing piece;

the light guide part is provided with two opposite ends, one end of the light guide part is inserted into the first light transmission hole, and the other end of the light guide part is inserted into the second light transmission hole.

In an embodiment of the present invention, the pressing mechanism further includes an elastic member, the elastic member is sleeved on the lateral surface of the light guide member and abuts against the cavity bottom wall of the accommodating cavity and the pressing member facing one side of the cavity bottom wall of the accommodating cavity.

In an embodiment of the present invention, the bottom wall of the accommodating cavity is further provided with a mounting post;

the key further comprises a torsional spring, the torsional spring comprises a torsional spring body, a first elastic arm and a second elastic wall, the torsional spring body is sleeved on the lateral periphery of the mounting column, the first elastic arm and the second elastic wall are connected to the torsional spring body and arranged in an included angle mode, and the first elastic arm is limited and fixed on the base;

the light blocking member is provided with a guide structure, and when the pressing assembly is driven, the second elastic wall is abutted against the guide structure and rotates.

The utility model also provides a keyboard, which comprises a keyboard body and keys arranged on the keyboard body; the key includes:

a light emitter;

the optical receiver is arranged at a distance from the optical transmitter;

The technical scheme of the utility model the button when being applied to the keyboard, can send light signal through the light emitter, this light signal can transmit to light receiver through the reflection part plane of reflection of locating the base. When the pressing component of the pressing mechanism is pressed and driven, the pressing component can move relative to the base and drive the light blocking piece connected with the pressing component to move along with the pressing component. When the light blocking member moves to a certain distance and is positioned between the reflecting part and the light receiver, the light path between the reflecting part and the light receiver can be conducted or blocked, so that the key function is realized. Meanwhile, the optical signal sent by the optical transmitter can be transmitted to the pressing component through the light transmission part, so that the pressing component is illuminated, and a user can operate the key in a dark environment. Because the key in the scheme can realize the key function and illuminate the key through the same light emitter, compared with the prior art that two light emitters need to be correspondingly arranged in the processes of realizing the function and illuminating the key, the key in the scheme can reduce the using quantity of the light emitters. Therefore, when more keys are arranged on the keyboard, the structure of the keyboard can be effectively simplified, and the manufacturing cost of the keyboard is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of a key according to an embodiment of the present invention;

FIG. 2 is a schematic view of another perspective of the key of FIG. 1;

FIG. 3 is a cross-sectional view of the key of FIG. 1;

FIG. 4 is a partial cross-sectional view of the key of FIG. 1;

FIG. 5 is another partial cross-sectional view of the key of FIG. 1.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the description of the "reflection portion", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "reflective portion" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a key.

Referring to fig. 1, fig. 2 and fig. 3, in an embodiment of the present invention, the key includes a light emitter 10, a light receiver 30, a base 50 and a pressing mechanism 70; wherein, the optical receiver 30 and the optical transmitter 10 are arranged at intervals; the base 50 is formed with a light-transmitting part 51 and a reflection part 52, the light-transmitting part 51 and the reflection part 52 are arranged corresponding to the light emitter 10, and the reflection part 52 can transmit the light signal emitted by the light emitter 10 to the light receiver 30; the pressing mechanism 70 comprises a pressing component 71 and a light blocking member 73, the pressing component 71 is movably arranged on the base 50 and covers the light-transmitting part 51, and the light-transmitting part 51 can transmit the optical signal emitted by the optical transmitter 10 to the pressing mechanism 70; the light blocking member 73 is connected to the pressing member 71, and when the pressing member 71 is driven, the light blocking member 73 can conduct or block the light path between the reflection portion 52 and the light receiver 30.

In an embodiment of the present invention, the optical transmitter 10 is mainly used for transmitting an optical signal to the optical receiver 30, which can be an led (light Emitting diode) lamp, so that the optical transmitter 10 has the advantages of energy saving, environmental protection, convenience for installation and long service life. The optical receiver 30 is mainly used for receiving the optical signal emitted by the optical transmitter 10 and triggering the key function. Specifically, the optical receiver 30 may be electrically connected to a circuit board of the keyboard, and when the optical path between the optical receiver 30 and the optical transmitter 10 is switched on or off, the optical signal information may be transmitted to the circuit board, and then the circuit board may control the display to display the input information according to the optical signal information, thereby implementing the key function. Since it is the prior art to realize the key function through the optical path, it is not described in detail. The light emitter 10 and the light receiver 30 may be mounted on a circuit board, or may be mounted on the base 50, which is not limited in this application, so as to ensure that the light receiver 30 can operate the trigger circuit board to realize the key function. The base 50 is mainly used for mounting and carrying the pressing assembly 71 and the light blocking member 73 of the pressing mechanism 70, so that the pressing assembly and the light blocking member form a whole and can be mounted on the keyboard body of the keyboard at one time, and the convenience of key mounting is improved. In addition, the light-transmitting portion 51 and the reflection portion 52 formed on the base 50 can transmit a part of the optical signal emitted by the optical transmitter 10 to the optical receiver 30 through the reflection portion 52, and transmit the other part of the optical signal to the pressing member 71 of the pressing mechanism 70 through the light-transmitting portion 51, thereby achieving the effect of one-light dual-purpose. The projection of the base 50 on the horizontal plane may be square, so that the base has a relatively large installation area to facilitate the distribution of the pressing mechanisms 70. Of course, in other embodiments, the projection of the base 50 on the horizontal plane may be circular or elliptical. The base 50 may be made of plastic, for example: ABS, POM, PS, PMMA, PC, PET, etc. to reduce the mass of the base 50 to make the keyboard portable; of course, the material may be metal, such as: the base 50 is made of aluminum material, aluminum alloy material, copper alloy material, iron material and stainless steel material, so that the strength of the base can be improved, and the service life can be prolonged. The pressing component 71 of the pressing mechanism 70 is mainly used for being pressed and driven by a keyboard user to drive the light blocking member 73 to move so as to conduct or block the light path between the light emitter 10 and the reflection portion 52. When the pressing member 71 is not pressed and driven, the optical path between the light receiver 30 and the reflection portion 52 may be in a conduction state; after the pressing member 71 is pressed and driven, the light blocking member 73 moves downward to block the light path therebetween. Of course, when the pressing member 71 is not pressed and driven, the optical path between the light receiver 30 and the reflection portion 52 may be in a blocked state; after the pressing member 71 is pressed and driven, the light blocking member 73 moves downward to conduct the light path therebetween. In addition, the projection of the pressing component 71 on the horizontal plane may be square, or may be circular or elliptical, and specifically may be set according to the projection shape of the base 50 on the horizontal plane, so that the two components are distributed in a compact and small overall size. In order to improve the connection strength between the pressing assembly 71 and the light blocking member 73, the pressing assembly 71 and the light blocking plate may be integrally formed, so that the pressing assembly 71 and the light blocking plate may be integrally formed to improve the production efficiency.

The technical scheme of the utility model the button when being applied to the keyboard, can send light signal through light emitter 10, this light signal can transmit to light receiver 30 through the reflection part 52 plane of reflection 5211 of locating base 50. When the pressing member 71 of the pressing mechanism 70 is pressed and driven, the pressing member 71 can move relative to the base 50, and drives the light blocking member 73 connected to the pressing member 71 to move therewith. When the light blocking member 73 is moved to a certain distance and positioned between the reflection portion 52 and the light receiver 30, the light path between the reflection portion 52 and the light receiver 30 may be turned on or off, thereby implementing the key function. Meanwhile, the optical signal emitted by the optical transmitter 10 can also be transmitted to the pressing component 71 through the transparent part 51, so that the pressing component 71 is illuminated, and a user can operate the key in a dark environment. Because the key in the scheme can realize the key function and illuminate the key through the same light emitter 10, compared with the prior art that two light emitters 10 need to be correspondingly arranged in the processes of realizing the function and illuminating the key, the key in the scheme can reduce the using number of the light emitters 10. Therefore, when more keys are arranged on the keyboard, the structure of the keyboard can be effectively simplified, and the manufacturing cost of the keyboard is reduced.

Referring to fig. 2 and 3, in an embodiment of the present invention, the base 50 has two opposite sides, the base 50 is provided with a first light hole 511 and a passing hole 53 penetrating through the two opposite sides of the base 50, the first light hole 511 forms a light-transmitting portion 51, and the reflecting portion 52 is disposed on one of the two opposite sides of the base 50 and partially disposed in the first light hole 511; the light emitter 10 and the light receiver 30 are located on a side of the base 50 facing the reflection portion 52; the pressing member 71 is located on a side of the base 50 facing away from the reflection portion 52, and when the pressing member 71 is driven, the light blocking member 73 can pass through the relief hole 53 to block the light path between the reflection portion 52 and the light receiver 30.

It will be appreciated that the arrangement of the pressing member 71, the light emitter 10 and the light receiver 30 on opposite sides of the base 50 enables a more compact arrangement, thereby reducing the space occupied by the keyboard to meet the consumer's demand for ultra-thin type. Of course, in other embodiments, the pressing members 71 may be respectively disposed on the outer sides of the base 50, and the light emitter 10 and the light receiver 30 are disposed on the inner sides of the base 50. By forming the light transmission portion 51 through the light transmission hole, the structure of the light transmission portion 51 can be simplified, and the complexity of molding the light transmission portion 51 can be reduced. Of course, the present application is not limited thereto, and in other embodiments, a transparent material may be embedded at a position corresponding to the light emitter 10 during the molding process of the base 50. The first reflection portion 52 extends into the light-transmitting hole, so that the first reflection portion 52 and the light-transmitting portion 51 are distributed on the base 50 more closely, which facilitates the light signal emitted by one light emitter 10 to irradiate the first reflection portion 52 and the light-transmitting portion 51 simultaneously. Of course, when the irradiation range of the light emitter 10 is wide, the light transmitting portion 51 and the first reflecting portion 52 may be provided at an interval. The opening shape of the passing hole 53 may be square, or may be circular, and specifically may be set according to the shape of the light barrier, so that the hole wall of the passing hole 53 has a guiding effect on the light blocking member 73, and the stability of the pressing assembly 71 and the light blocking member 73 when being pressed and driven is improved.

In an embodiment of the present invention, a light-gathering boss 54 is disposed on a side of the base 50 facing the light emitter 10, the light-gathering boss 54 is disposed around the light emitter 10, and a light avoiding hole 541 is disposed through an inner side and an outer side of the light-gathering boss 54, the light avoiding hole 541 and the light receiver 30 are disposed oppositely; the reflecting portion 52 is located within the light-gathering boss 54.

It can be understood that, when the light-gathering projection 54 is made of a light-reflecting material, the light signal emitted by the light emitter 10 can be reflected by the inner wall of the light-gathering projection 54, so that the light signal irradiated to the inner wall of the light-gathering projection 54 can be reflected to the light-transmitting portion 51 and the reflecting portion 52, thereby reducing the energy loss of the light signal emitted by the light emitter 10 and improving the utilization efficiency of the light signal. Meanwhile, the light-gathering boss 54 can also protect the light emitter 10 to a certain extent, so that the installation tightness of the light emitter 10 is improved. In addition, the light-gathering projection 54 and the base 50 may be integrally formed to enhance the connection strength therebetween, or may be integrally formed. Further, in order to facilitate the light shielding member 73 to cover the light avoiding hole 541, so as to ensure the shielding effect between the light receiver 30 and the light reflecting portion, the light shielding member 73 may be disposed in a plate shape.

In an embodiment of the present invention, a reflective plate 521 is further disposed on one side of the base 50 facing the light emitter 10, the reflective plate 521 forms the reflective portion 52, the reflective plate 521 is connected to the inner side wall of the light-gathering boss 54, and the reflective plate 521 has a reflective surface 5211.

Specifically, the reflector 521 may have a substantially triangular shape, and an inclined surface thereof is disposed toward the light receiver 30 to form a reflecting surface 5211. So that the optical signal emitted from the optical transmitter 10 can be reflected to the optical receiver 30 when it irradiates the inclined surface of the reflective plate 521. Moreover, since the reflective plate 521 is connected to the inner sidewall of the light-gathering projection 54, the reflective portion 52 can not only reflect the light signal emitted by the light emitter 10, but also increase the connection strength between the light-gathering projection 54 and the base 50. Of course, the present application is not limited thereto, and in other embodiments, a side of the base 50 facing the light emitter 10 may be further provided with a groove having a triangular longitudinal section, and the groove bottom wall of the inclined groove reflects the light signal emitted by the light emitter 10, that is, the groove forms the reflection portion 52.

In an embodiment of the present invention, the key further includes a light guide 90, and the light guide 90 is at least partially embedded in the first light hole 511.

It can be understood that, since the light guide 90 is generally made of a material with high reflectivity and light absorption, the light signal emitted by the light emitter 10 is transmitted to the pressing component 71 through the guide, so that the utilization efficiency of the light signal emitted by the light emitter 10 can be further improved. The guiding member may be disposed in a cylindrical shape, so that the first light-transmitting hole 511 may be disposed in a circular shape to facilitate the machining of the first light-transmitting hole 511. Further, because the part of leaded light 90 and the part of reflector 521 all are located first light trap 511, when both were comparatively close to, leaded light 90 can be equipped with and dodge the groove, and the part of reflector 521 is inlayed and is located this and dodges the inslot, so through this the joint limiting displacement who dodges the groove also can improve the stability of leaded light 90 installation. In addition, in order to improve the illumination effect of the pressing member 71, the first light hole 511 may be located at the center of the base 50, so that the light guide 90 is located at the center of the base 50, and further, the light signal is transmitted to the center area of the pressing member 71, so that the light signal can illuminate the whole pressing member 71 with high brightness and more uniformly. Of course, the present disclosure is not limited thereto, and in other embodiments, the light guide 90 is located at a side of the base 50, and the light receiver 30 is located at a position of the base 50.

In an embodiment of the present invention, an accommodating cavity 55 having a cavity opening is formed on a side of the base 50 facing the pressing component 71, and the first light-transmitting hole 511 and the passing hole 53 are both disposed on a cavity bottom wall of the accommodating cavity 55; the pressing component 71 is movably arranged in the accommodating cavity 55 and abuts against the cavity side wall of the accommodating cavity 55; the light blocking member 73 is attached to a side of the pressing member 71 facing the cavity bottom wall of the accommodation cavity 55.

It can be understood that the arrangement of the accommodating cavity 55 gives a mounting space for the pressing assembly 71 and the light blocking member 73, so that the pressing assembly 71 and the light blocking member 73 can be mounted more compactly with the base 50, thereby reducing the occupation of space. Meanwhile, the cavity sidewall of the accommodating cavity 55 can reflect a part of the light signal refracted and emitted from the side peripheral surface of the light guide 90, and reflect the reflected light signal to the pressing member 71, so that the utilization efficiency of the light signal can be further improved. In addition, the cavity side wall of the accommodating cavity 55 can also guide the moving process of the pressing assembly 71 and the light blocking member 73, so that the stability of the pressing assembly 71 and the light blocking member 73 in the moving process is improved, the pressing assembly can accurately move to a preset position to block the light path between the light receiver 30 and the reflecting part 52, and the normal and stable key function can be further ensured. Further, the cavity side wall of the accommodating cavity 55 may be provided with a sliding groove extending along the moving direction of the pressing component 71, and the pressing component 71 may be provided with a sliding block slidably connected in the sliding groove. The stability of the pressing assembly 71 and the light blocking member 73 during the movement process can be further improved by the cooperation of the slider and the sliding groove.

In an embodiment of the present invention, the pressing assembly 71 includes a pressing member 711 and a key cap; the pressing piece 711 is movably arranged in the accommodating cavity 55 and is provided with a second light transmission hole 7111 which penetrates through one side of the pressing piece 711 facing the cavity bottom wall of the accommodating cavity 55 and one side of the pressing piece 711 departing from the cavity bottom wall of the accommodating cavity 55, and the second light transmission hole 7111 and the first light transmission hole 511 are oppositely arranged; the keycap is arranged on one side of the pressing piece 711, which is far away from the bottom wall of the accommodating cavity 55, and covers the second light-transmitting hole 7111; the light blocking member 73 is connected to a side of the pressing member 711 facing the cavity bottom wall of the accommodation cavity 55; the light guide 90 has two opposite ends, one end of the light guide 90 is inserted into the first light hole 511, and the other end is inserted into the second light hole 7111.

It is understood that the pressing member 71 is configured in the form of the pressing member 711 and the key cap, so that the pressing member 71 can be movably connected with the base 50 through the pressing member 711, thereby realizing the pressable function of the pressing member 71. The key cap can increase the contact area between the keyboard user and the pressing component 71 when pressing the pressing component 71, so that the user can apply pressing force to improve the convenience of the keyboard; meanwhile, the keycap covers the pressing piece 711, so that the pressing piece can be protected in a sealing manner, and the possibility of dust or waste scraps entering the accommodating cavity 55 of the base 50 is reduced. And the second light hole 7111 is disposed such that the light signal emitted from the light emitter 10 is directly transmitted to the key cap, so as to enhance the intensity of illuminating the key cap for the user of the keyboard to recognize. Meanwhile, the second light transmission and the light guide member 90 are matched, so that the pressing member 711 can be guided in the downward moving process, and the stability of the pressing member 711 in the moving process is improved again. In addition, it should be noted that the present application is not limited thereto, and in other embodiments, the light emitter 10 may transmit the light signal to the pressing member 711 before transmitting the light signal to the key cap from the pressing member 711.

In an embodiment of the present invention, the pressing mechanism 70 further includes an elastic member 75, the elastic member 75 is sleeved on the lateral periphery of the light guide member 90 and abuts against the cavity bottom wall of the accommodating cavity 55 and one side of the pressing member 711 facing the cavity bottom wall of the accommodating cavity 55.

It can be understood that the elastic member 75 is provided to enable the pressing mechanism 70 to automatically reset after pressing is completed, thereby improving the convenience of the keyboard. Specifically, after the pressing mechanism 70 is pressed, the elastic member 75 is compressed and generates a deforming elastic force. When the external force acting on the pressing mechanism 70 disappears, the elastic element 75 is driven by the deformation elasticity to reset, so as to drive the pressing mechanism 70 to move up to the initial position. The elastic member 75 is sleeved on the lateral periphery of the light guide member 90, so that the light guide member 90 has a guiding effect on the elastic member 75, the elastic member 75 moves down, compresses and moves up to reset along the extending direction of the guide member, and stable driving of the pressing mechanism 70 by the elastic member 75 can be guaranteed. The elastic member 75 may be a spring, or may be a plastic member with certain elasticity.

Referring to fig. 3, fig. 4 and fig. 5, in an embodiment of the present invention, a mounting post 56 is further disposed on a bottom wall of the accommodating cavity 55; the key further comprises a torsion spring 77, the torsion spring 77 comprises a torsion spring body 771, a first elastic arm 773 and a second elastic wall, the torsion spring body 771 is sleeved on the lateral periphery of the mounting column 56, the first elastic arm 773 and the second elastic wall are connected to the torsion spring body 771 and arranged in an included angle, and the first elastic arm 773 is fixed on the base 50 in a limiting manner; the light blocking member 73 is provided with a guide structure 731, and when the pressing assembly 71 is driven, the second elastic wall abuts against the guide structure 731 and rotates.

It will be appreciated that the torsion spring 77 is arranged so that the button will sound an alert by colliding with the wall of the receiving cavity 55 when depressed. Therefore, a keyboard user can determine whether the keys are effectively pressed through the prompt sound, the phenomenon that the keys are repeatedly pressed or are omitted to be pressed is avoided, and the convenience of using the keyboard is further improved. Specifically, the guide structure 731 may have a substantially trapezoidal shape, and opposite sides thereof in parallel to the moving direction of the pressing piece 711 may form a first guide surface and a second guide surface. When the pressing assembly 71 is driven, the light blocking member 73 moves downward, and the first guiding surface of the guiding structure 731 drives the second elastic arm 775 to twist away from the light blocking member 73, i.e. rotate. When the light blocking member 73 descends to the second elastic arm 775, the second elastic arm 775 can be driven by the restoring elastic force to restore to the original shape and collide with the cavity wall of the accommodating cavity 55, so as to generate a prompt sound. Due to the arrangement of the second guide surface, in the process that the external force is cancelled and reset by the pressing assembly 71, the second elastic arm 775 can be driven to be twisted by the guide structure 731 through the second guide surface again, so that the guide structure 731 can pass through the second elastic arm 775 more smoothly, and meanwhile, a prompt sound can be given again to play a secondary prompt role for the user. The mounting post 56 is configured to limit the origin of rotation of the torsion spring 77 so that the torsion spring 77 rotates around the lateral periphery of the mounting post 56. Wherein the mounting post 56 may be cylindrically configured to better fit the torsion spring body 771.

In an embodiment of the present invention, the bottom wall of the accommodating cavity 55 is further provided with an installation groove 57, a limiting groove 58 communicating with the installation groove 57, and a movable groove 59; the mounting column 56 and the torsion spring body 771 are embedded in the mounting groove 57; the first elastic arm 773 is embedded in the limiting groove 58 and abuts against the groove side wall of the limiting groove 58; the second elastic arm 775 is fitted in the movable groove 59, and when the second elastic arm 775 abuts against the guide structure 731, the second elastic arm 775 rotates in the movable groove 59.

It can be understood that the installation grooves 57, the limiting grooves 58 and the movable grooves 59 provide installation space for the installation posts 56 and the torsion springs 77 to be installed without protruding from the bottom wall of the accommodating cavity 55. Thus, the pressing member 711 can be prevented from colliding with the mounting post 56 and the torsion spring 77 during the downward movement, and the safety of the pressing member 711 during the downward movement can be improved. The limiting groove 58 can simplify the limiting and fixing structure of the first elastic arm 773, that is, the first elastic arm 773 can be inserted into the limiting groove 58 to complete the installation, thereby improving the limiting and fixing efficiency of the first elastic arm 773 and reducing the manufacturing cost. Of course, the application is not limited thereto, and in other embodiments, the first elastic arm 773 and the base 50 may be fixed by welding.

The utility model discloses still provide a keyboard, this keyboard includes keyboard body and button, and the concrete structure of this button refers to above-mentioned embodiment, because this keyboard has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The above is only the preferred embodiment of the present invention, and the patent scope of the present invention is not limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A key, comprising:

a light emitter;

the optical receiver is arranged at a distance from the optical transmitter;

2. The key of claim 1, wherein the base has two opposing sides, the base having a first light hole and a relief hole extending through the two opposing sides of the base, the first light hole forming the light transmitting portion, the reflective portion being disposed on one of the two opposing sides of the base and partially within the first light hole;

3. The key according to claim 2, wherein a light-gathering boss is provided on a side of the base facing the light emitter, the light-gathering boss is disposed around the light emitter and provided with light-avoiding holes penetrating through inner and outer sides of the light-gathering boss, and the light-avoiding holes are disposed opposite to the light receiver;

the reflecting part is positioned in the light-gathering boss.

4. The key of claim 3, wherein a reflective plate is further disposed on a side of the base facing the light emitter, the reflective plate forming the reflective portion, the reflective plate being connected to an inner sidewall of the light-gathering projection, the reflective plate having a reflective surface.

5. The key of any one of claims 2 or 4, further comprising a light guide at least partially embedded within the first light-transmissive hole.

6. The key according to claim 5, wherein a receiving cavity having an opening is formed on a side of the base facing the pressing component, and the first light-transmitting hole and the passing hole are both disposed on a cavity bottom wall of the receiving cavity;

7. The key of claim 6, wherein the pressing assembly comprises a pressing member and a keycap;

8. The key of claim 7, wherein the pressing mechanism further comprises an elastic member, the elastic member is sleeved on the side circumference of the light guide member and abuts against the bottom wall of the accommodating cavity and one side of the pressing member facing the bottom wall of the accommodating cavity.

9. The key of claim 6, wherein the bottom wall of the accommodating cavity is further provided with a mounting post;

10. A keyboard comprising a keyboard body and a key according to any one of claims 1 to 9, said key being mounted to said keyboard body.