CN213754476U - Touch key structure and electronic device - Google Patents

Abstract

The utility model relates to a touch button structure, include: a housing having a touch area on an outer surface; the base is connected with the shell in an assembling mode, a circuit board is arranged in the base, and a touch pad is arranged on the circuit board; and the conductive foam is arranged between the touch area and the touch pad, and a light homogenizing layer is arranged on one side of the conductive foam, which faces the touch area. The conductive foam is arranged between the touch area and the touch pad, touch on the touch area is transmitted to the touch pad by the conductive foam, the fitting degree of the conductive foam and the touch area is good, the touch sensitivity is high, the conductive foam is simple to install, and the cost is low. Meanwhile, the light homogenizing layer is arranged on the surface of the conductive foam, which faces the touch area, so that the light irradiating the touch area is moderate and uniform in intensity. An electronic device with the touch key structure is also provided.

Description

Touch key structure and electronic device

Technical Field

The utility model relates to an electronic equipment technical field, concretely relates to touch button structure still relates to an electron device who has this kind of touch button structure.

Background

In a traditional Touch key structure, a spring, an FPC (flexible printed circuit) or a Touch PCBA (Touch pad PCBA) is designed to realize Touch key functions with different shapes in an installation mode. Generally, if a spring is used for realizing a touch function, production is completed in a via hole plug-in mode, so that material turnover is increased, and loss in the turnover process is increased; the PCBA scheme of the touch pad is only suitable for products with planar shapes, and is relatively limited; if use FPC to realize the touch function, use and can realize more easily on the curved surface product, but material cost is too high, and can increase the winding displacement seat on the connection of the mainboard of FPC winding displacement equipment, increases the management expenditure of material storage.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a touch key structure suitable for application to curved products. An electronic device having such a key structure is also presented.

A touch key structure comprising: a housing having a touch area on an outer surface; the base is connected with the shell in an assembling mode, a circuit board is arranged in the base, and a touch pad is arranged on the circuit board; and the conductive foam is arranged between the touch area and the touch pad, and a light homogenizing layer is arranged on one side of the conductive foam, which faces the touch area.

According to the touch key structure of the embodiment, the conductive foam is arranged between the touch area and the touch pad, the touch on the touch area is transmitted to the touch pad by the conductive foam, the bonding degree of the conductive foam and the touch area is good, the touch sensitivity is high, the conductive foam is simple to install, and the cost is low. Meanwhile, the light homogenizing layer is arranged on one side, facing the touch area, of the conductive foam, so that the light irradiated to the touch area is moderate in intensity and uniform.

In one embodiment, the light homogenizing layer is a light homogenizing paper fixed on the conductive foam.

In one embodiment, the circuit board is further provided with a backlight source, one side of the conductive foam facing the circuit board is provided with an accommodating hole, and the backlight source is accommodated in the accommodating hole.

In one embodiment, the touch pad is disposed around the backlight.

In one embodiment, the backlight source is an LED lamp.

In one embodiment, the outer surface of the housing is curved.

In one embodiment, the conductive foam completely covers the touch pad and completely covers the touch area.

In one embodiment, the conductive foam is adhered to the circuit board.

An electronic device comprises the touch key structure. In the electronic device, the conductive foam is arranged between the touch area and the touch pad, the touch on the touch area is transmitted to the touch pad by using the conductive foam, the fitting degree of the conductive foam and the touch area is good, the touch sensitivity is high, the conductive foam is simple to install, and the cost is low. Meanwhile, the light homogenizing layer is arranged on one side, facing the touch area, of the conductive foam, so that the light irradiated to the touch area 111 is moderate in intensity and uniform.

In one embodiment, the electronic device is an interphone.

Drawings

Fig. 1 is a perspective assembly view of a touch key structure according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the touch key structure shown in fig. 1.

Fig. 3 is a sectional view taken along the line a-a in fig. 1.

Fig. 4 is a perspective view of an angle of the light guide foam of fig. 2.

Fig. 5 is a schematic perspective view of another angle of the light guide foam in fig. 2.

The relevant elements in the figures are numbered correspondingly as follows:

100. a housing; 110. an outer surface; 111. a touch area; 112. an active area; 200. a base; 210. a circuit board; 211. a touch pad; 212. a backlight source; 300. conductive foam; 310. a light homogenizing layer; 320. an accommodation hole.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, 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 the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As described in the background art, the touch solution in the prior art has different disadvantages when applied to curved products, and the effect is not ideal.

In order to solve the above problem, an embodiment of the present invention provides a touch key structure, which has great advantages when applied to curved surface products. Of course, the touch key structure provided by the embodiment of the present invention can be applied to a planar product as well. The curved surface and the plane surface refer to that the outer surface of the product, which is provided with the touch area, is a curved surface and a plane surface. The specific type of the product is not limited, and the product can be an interphone applied to a building system, and an intelligent security product such as an outdoor doorway machine, a touch switch and the like.

The touch key structure according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, fig. 1 illustrates a perspective assembly view of a touch key structure according to an embodiment of the present invention. As shown in fig. 2, fig. 2 illustrates an exploded perspective view of a touch key structure according to an embodiment of the present invention. As shown in fig. 3, fig. 3 is a cross-sectional view illustrating a touch key structure according to an embodiment of the present invention.

Referring to fig. 1 to 3, a touch key structure according to an embodiment of the present invention includes a housing 100, a base 200, and a conductive foam 300, wherein the housing 100 is mounted to the base 200. The outer surface 110 of the housing 100 is provided with a touch area 111. The base 200 is provided with a circuit board 210, wherein the circuit board 210 is provided with a touch pad 211 corresponding to the touch area 111. The conductive foam 300 is sandwiched between the touch pad 211 and the touch area 111. When the outer surface 110 of the housing 100 touches the touch area 111, the touch area 111 is deformed and transferred to the touch pad 211 through the conductive foam 300 to trigger a corresponding function. The conductive foam 300 has elastic deformation capacity, so that the contact degree with the touch area 111 is high, touch sensitivity is achieved, user experience is improved, and the conductive foam has obvious advantages compared with the traditional technology when being applied to curved surface products. Additionally, the utility model discloses an embodiment, with the cotton 300 clamp of electrically conductive bubble establish can obtain the touch button structure that is applicable to the curved surface product between touch district 111 and touch pad 211, wherein the cotton 300 cost of electrically conductive bubble is lower relatively to guaranteed that curved surface product touch sensitivity and cost price are lower, reduce the winding displacement seat on circuit board 210 surface in addition, or reduce the plug-in components material and utilize full SMT processing procedure to handle in order to realize circuit board 210, can reduce man-hour and material management expenditure effectively on the whole.

Touch pad is a part of circuit board 210, can trigger the default function when it is touched, and this technique itself is prior art, not the utility model discloses improve the place, here is not repeated.

Preferably, the outer surface 110 of the casing 100 is a curved surface, i.e. the touch key structure of the embodiment of the present invention is configured to be suitable for being constructed as a curved surface product. Of course, it can also be applied to flat products.

The touch pad can be disposed at a plurality of positions, such as three positions in the example of fig. 2. As shown in fig. 1, the same number of active areas 112 are correspondingly provided on the touch area 111. Different active areas 112 correspond to different preset functions.

In order to facilitate operation and improve user experience, a backlight source matched with the touch key structure is arranged in the electronic device. The backlight can illuminate the touch area 111. At this time, when the touch area 111 on the outer surface 110 of the housing 100 is viewed from the outside, the visually-visible touch area 111 is a light-emitting area, so that the user can conveniently operate the touch device, especially in a dark environment. It is to be understood that the type of light source of the backlight is not limited, and the color is not limited. Among them, the LED lamp is a commonly used backlight.

However, the backlight is usually a point light source, and when the backlight irradiates the touch area 111, the light distribution in the touch area 111 is uneven, and the color is too strong, which adversely affects the user experience.

In order to solve the above problem, in the touch key structure of the embodiment of the present invention, a light uniformizing layer 310 is further disposed on one side of the conductive foam 300 facing the touch area 111. The light-evening layer 310 is specifically a light-evening paper arranged on the conductive foam 300. The light uniformizing layer 310 plays a role in reducing the light transmittance of the backlight source on one hand, and avoids glare; on the other hand, the light-equalizing layer 310 diffuses the light of the backlight source, especially the light of the point light source, into the surface light source, so that the intensity of the light irradiated to the touch area 111 is moderate and uniform. Moreover, the light homogenizing layer 310 can deform along with the conductive foam 300, and the touch key structure is still guaranteed to be suitable for curved surface products.

In the touch key structure of the embodiment, the conductive foam 300 is arranged between the touch area 111 and the touch pad 211, the touch on the touch area 111 is transmitted to the touch pad 211 by using the conductive foam 300, the bonding degree between the conductive foam 300 and the touch area 111 is good, the touch sensitivity is high, the conductive foam 300 is simple to install, and the cost is low. Meanwhile, the light uniformizing layer 310 is disposed on a side of the conductive foam 300 facing the touch area 111, so that the intensity of light irradiated to the touch area 111 is moderate and uniform.

In order to facilitate the diffusion of the light emitted from the backlight source, in some embodiments, the circuit board 210 is further provided with a backlight source, one side of the conductive foam 300 facing the circuit board 210 is provided with an accommodating hole 320, and the backlight source is accommodated in the accommodating hole 320.

By accommodating the backlight in the accommodating hole 320 of the conductive foam 300, on one hand, the space volume can be saved, and on the other hand, the light emitted by the backlight is emitted to the light uniformizing layer 310 in a concentrated manner, thereby avoiding light leakage.

In a specific arrangement, the touch pads 211 may be disposed around the backlight. Thus, the receiving hole 320 of the conductive foam 300 receives the backlight source therein, and the peripheral portion of the receiving hole 320 of the conductive foam 300 contacts the touch pad 211, so as to meet the requirements of receiving the backlight source and contacting the touch pad 211.

In some embodiments, to improve touch sensitivity, the conductive foam 300 is configured to completely cover the touch pad 211 and completely cover the touch area. Specifically, as shown in fig. 4 and 5, the conductive foam 300 is a rectangular parallelepiped, an area of a side of the conductive foam 300 opposite to the touch pad 211 is greater than or equal to an area of the touch pad 211 covering the circuit board 210, and an area of a side of the conductive foam 300 opposite to the touch area 111 is greater than or equal to an area of the touch area 111. Through the above means, when the outer surface 110 of the housing 100 lightly touches the touch area 111, the touch area 111 deforms and is transmitted to the touch pad 211 through the conductive foam 300 to trigger a corresponding function, and the conductive foam 300 can effectively increase the touch area, so that touch control is sensitive, and user experience is improved.

Further, the shape of the conductive foam 300 may be configured to match the shape of the touch area 111 and the area covered by the touch pad 211.

In some embodiments, to facilitate the installation of the conductive foam 300, the conductive foam 300 is adhered to the circuit board 210. During specific implementation, before the conductive foam 300 is installed on the circuit board 210, the back adhesive is arranged on the side, provided with the accommodating hole 320, of the conductive foam 300, and the conductive foam 300 can be adhered to the corresponding copper exposed pad of the circuit board 210 to complete assembly only by tearing off the foam back adhesive.

In another embodiment of the present invention, an electronic device is provided, which includes the touch button structure of the foregoing embodiments. The electronic device is an interphone and can be applied to building systems.

In the electronic device, the conductive foam 300 is arranged between the touch area 111 and the touch pad 211, the touch on the touch area 111 is transmitted to the touch pad 211 by the conductive foam 300, the bonding degree between the conductive foam 300 and the touch area 111 is good, the touch sensitivity is high, and the conductive foam 300 is simple to mount and low in cost. Meanwhile, the light uniformizing layer 310 is disposed on a side of the conductive foam 300 facing the touch area 111, so that the intensity of light irradiated to the touch area 111 is moderate and uniform.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A touch key structure, comprising:

a housing having a touch area on an outer surface;

the base is connected with the shell in an assembling mode, a circuit board is arranged in the base, and a touch pad is arranged on the circuit board;

and the conductive foam is arranged between the touch area and the touch pad, and a light homogenizing layer is arranged on one side of the conductive foam, which faces the touch area.

2. The touch key structure of claim 1, wherein the light uniformizing layer is a light uniformizing paper fixed on the conductive foam.

3. The touch key structure of claim 1, wherein the circuit board is further provided with a backlight source, one side of the conductive foam facing the circuit board is provided with an accommodating hole, and the backlight source is accommodated in the accommodating hole.

4. The touch key structure of claim 3, wherein the touch pad is disposed around the backlight.

5. The touch key structure of claim 3 or 4, wherein the backlight source is an LED lamp.

6. The touch key structure of claim 1, wherein the outer surface of the housing is curved.

7. The touch key structure of claim 1, wherein the conductive foam completely covers the touch pad and completely covers the touch area.

8. The touch key structure of claim 1, wherein the conductive foam is bonded to the circuit board.

9. An electronic device characterized by comprising the touch key structure according to any one of claims 1 to 8.

10. The electronic device of claim 9, wherein the electronic device is an intercom.

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