CN212230297U

CN212230297U - Key structure and electronic product

Info

Publication number: CN212230297U
Application number: CN202020901119.7U
Authority: CN
Inventors: 徐洪先
Original assignee: Hangzhou Tuya Information Technology Co Ltd
Current assignee: Hangzhou Tuya Information Technology Co Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-12-25
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a button structure and electronic product, the button structure includes: a circuit board; the key assembly is arranged on the circuit board and used for connecting or disconnecting the circuit when the circuit board is pressed; a light source disposed on the circuit board; the light guide plate is arranged around the outside of the key assembly and is arranged above the light source; the light-transmitting element is arranged around the outside of the key assembly and above the light guide plate, and is made of a transparent material; the light emitted by the light source is uniformly distributed through the light guide plate and then emitted out of the light-transmitting element. In this way, the utility model discloses can have more even luminous effect.

Description

Key structure and electronic product

Technical Field

The utility model relates to a switch part technical field especially relates to a button structure and electronic product.

Background

Currently, in some electronic products, a light guide structure is disposed around the key to display the outline of the key for aesthetic or functional requirements. As shown in fig. 1 and 2, a key structure includes: the circuit board 1, fixed a plurality of light sources 2, printing opacity component 3 and the button subassembly 4 of being provided with on the circuit board 1, a plurality of light sources 2 enclose around locating the button subassembly 4 and the interval sets up, printing opacity component 3 encloses around locating the button subassembly 4 and lies in the top of light source 2, and printing opacity component 3 still leaks in casing 5, and printing opacity component 3 guides the light of light source 2 outside casing 5.

Because the light sources 2 are arranged at intervals, the light-emitting side of the light-transmitting element 3 has stronger brightness at the position corresponding to the light source 2, and the rest positions are relatively weaker, so that the phenomenon of uneven brightness is presented on the whole.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem of main solution provides a button structure and contains the electronic product of this button structure, has more even luminous effect.

In order to solve the above technical problem, the utility model discloses a technical scheme provide a button structure, include:

a circuit board;

the key assembly is arranged on the circuit board and used for connecting or disconnecting the circuit when the circuit board is pressed;

a light source disposed on the circuit board;

the light guide plate is arranged around the outside of the key assembly and is arranged above the light source; and

the light-transmitting element is arranged around the key assembly and above the light guide plate, and is made of a transparent material;

the light emitted by the light source is uniformly distributed through the light guide plate and then emitted out of the light-transmitting element.

In order to solve the above technical problem, the utility model also provides an electronic product, include: the key structure is arranged in the shell and is exposed through the mounting hole part.

The utility model has the advantages that: be different from prior art's condition, the utility model discloses set up the light guide plate between printing opacity component and light source, ejected by printing opacity component again after the light that sends the light source through the light guide plate evenly spreads, changed into the area source with the pointolite in other words, had more even luminous effect.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art key structure;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic cross-sectional view of an embodiment of a key structure of the present application;

fig. 4 is a schematic three-dimensional structure diagram of a light-transmitting element and a cantilever in the key structure of the present application.

In the figure:

1. the light source module comprises a circuit board, 2, a light source, 3, a light-transmitting element, 301, a groove, 302, a first surface, 303, a second surface, 4, a key assembly, 401, a keycap, 402, a switch, 5, a shell, 501, a mounting hole, 6, a light guide plate and 7, a cantilever.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 3 and 4, the present invention provides a key structure, which can be applied to electronic products such as computers and mobile phones. The electronic product comprises a shell 5, and a mounting hole 501 is formed in the shell 5. The key structure is disposed in the housing 5 and partially exposed from the mounting hole 501. The key structure includes: circuit board 1, button subassembly 4, light source 2, light guide plate 6 and printing opacity component 3.

The key assembly 4 is disposed on the circuit board 1 and is used to turn on or off a circuit when a pressing force is applied thereto. The Light source 2 is disposed on the circuit board 1, and may be a Light bulb Light source or an LED (Light Emitting Diode). LEDs are preferred in this embodiment to facilitate the placement of the light source 2 on the circuit board 1. Normally, when key assembly 4 turns on the circuit of circuit board 1, light source 2 emits light, and when key assembly 4 turns off the circuit of circuit board 1, light source 2 is turned off. In order to make the luminous effect more even, light source 2 sets up a plurality ofly, sets up along the circumference interval of button subassembly 4.

The light guide plate 6 is flat, is parallel to the circuit board 1, surrounds the key assembly 4, is disposed above the light source 2, and is configured to uniformly disperse light emitted from the light source 2. The light guide plate is provided with an upper surface and a lower surface which are opposite, the lower surface is provided with a microstructure array with a certain arrangement rule, and after light enters the light guide plate, the total reflection phenomenon of the upper surface of the light guide plate is destroyed through the scattering effect of the microstructures, so that the light changes the original geometric optical path and is emitted from the upper surface. The light guide plate is a prior art and is not described herein. The light guide plate 6 is preferably a frosted light guide plate, and the frosted surface is located on the upper surface (light exit side).

The light transmission element 3 is arranged around the key assembly 4 and above the light guide plate 6, the light transmission element 3 is made of transparent material, and in order to increase the light guide effect, proper light guide powder is added or the outside is subjected to pattern drying treatment. In order to make the transparent element 3 uniformly stressed when being pressed (the keycap 401 is fixed with the transparent element 3), two cantilevers 7 are arranged in the embodiment, and are symmetrically arranged on two sides of the transparent element 3.

In order to limit the transparent element 3, the outer edge of the top of the transparent element 3 is provided with a tongue-and-groove 301 (step), the tongue-and-groove 301 is arranged around the transparent element 3, and the tongue-and-groove 301 is used for being clamped at the edge of a mounting hole 501 arranged on the shell 5 of the electronic product.

In this embodiment, the light guide plate 6 is disposed between the light transmissive element 3 and the light source 4, and the light emitted from the light source 2 is emitted from the light transmissive element 3 after being uniformly dispersed by the light guide plate 6, which is equivalent to converting a point light source into a surface light source, and has a more uniform light emitting effect.

In a preferred embodiment of the present invention, the key assembly 4 includes: a key cap 401 and a switch 402, the key cap 401 is fixed on the transparent element 3, the transparent element 3 is elastically fixed (see below) for transmitting the pressing force to the switch 402, and the switch 402 is disposed on the circuit board 1 and below the key cap 401 for receiving the pressing force and turning on or off the circuit. The switch 402 may be manufactured with the circuit board 1. The keycap 401 is typically made of an opaque material.

The elastic fixing mode of the light transmission element 3 can be as follows: the light-transmitting element 3 is fixedly connected with at least one elongated cantilever 7, and the end of the cantilever 7 is fixed and can be fixed on the shell 5. Thereby, the light-transmitting member 3 is elastically fixed to facilitate the pressing operation of the key assembly 4.

To reduce the space occupied by the cantilever 7, the cantilever 7 extends along the periphery of the light transmissive member 3 and is spaced from the light transmissive member 3. In the present embodiment, the outer periphery of the light-transmitting component 3 is circular, so the cantilever 7 has a substantially circular arc shape.

In an optional implementation manner of this embodiment, the light-transmitting element 3 is provided with a first surface 302 and a second surface 303 opposite to each other in a direction perpendicular to the circuit board 1, light emitted by the light source 2 is incident from the first surface 302 and then emitted from the second surface 303, and a distance from the first surface 302 to the second surface 303 gradually decreases with distance from the light source 2. That is, the farther from the light source 2, the shorter the propagation path of the light in the light-transmitting member 3, thereby enhancing the intensity of the light emitted from the light source 2.

Obviously, in the electronic product, by providing the key structure, the light emitted by the light source 2 is emitted from the light-transmitting element 3 after being uniformly dispersed through the light guide plate 6, which is equivalent to converting a point light source into a surface light source, and has a more uniform light-emitting effect.

The above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes performed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present invention.

Claims

1. A key structure, comprising:

a circuit board;

the light source is arranged on the circuit board;

the light guide plate is arranged around the key assembly and is arranged above the light source; and

2. The key structure of claim 1, wherein the light guide plate is a frosted light guide plate.

3. The key structure of claim 1, wherein the light guide plate is disposed parallel to the circuit board.

4. The key structure of claim 1, wherein the light source is provided in plurality, and the plurality of light sources are arranged at intervals along a circumferential direction of the key assembly.

5. The key structure of claim 1, wherein the light source is an LED.

6. The key structure according to claim 1, wherein the key assembly comprises: the key cap is fixed on the light-transmitting element and used for transmitting the received pressing force to the switch, and the switch is arranged on the circuit board, is positioned below the key cap and is used for receiving the pressing force and switching on or off the circuit.

7. The key structure of claim 6, further comprising: and one end of the cantilever is fixed, and the other end of the cantilever is fixedly connected with the light-transmitting element.

8. The key structure according to claim 1, wherein a tongue-and-groove is arranged on an outer edge of the top of the light-transmitting element, the tongue-and-groove is arranged around the light-transmitting element, and the tongue-and-groove is used for being clamped on an edge of a mounting hole arranged on a shell of an electronic product.

9. The key structure of claim 1, wherein the light-transmissive element has a first surface and a second surface opposite to each other in a direction perpendicular to the circuit board, the light emitted from the light source is incident from the first surface and then emitted from the second surface, and a distance from the first surface to the second surface gradually decreases with increasing distance from the light source.

10. An electronic product, comprising: the key structure of any one of claims 1 to 9, wherein the housing has a mounting hole formed therein, and the key structure is disposed in the housing and exposed through the mounting hole.