CN210199732U - Electrical apparatus and capacitance touch key assembly thereof - Google Patents

Abstract

The utility model relates to an use electrical apparatus and electric capacity touch key subassembly thereof, should include panel and electric capacity touch key subassembly with electrical apparatus, electric capacity touch key subassembly locates under the panel. The capacitive touch key assembly comprises a circuit board, a touch sensing electrode, a shell and a conductor. The touch sensing electrode is arranged on the upper surface or the lower surface of the circuit board. The shell covers the circuit board to form an accommodating space. The conductor is arranged in the accommodating space and coupled with the touch sensing electrode.

Description

Electrical apparatus and capacitance touch key assembly thereof

Technical Field

The utility model relates to an use electrical apparatus, especially relate to an electric capacity touch key subassembly with electrical apparatus.

Background

The basic working principle of the capacitive touch key is to determine whether a finger presses the touch key by detecting the change of the distributed capacitance on the capacitive touch sensing key. If the key is not touched, the distributed capacitance of the touch key has a fixed capacitance value, and if a user touches the key with a finger, the distributed capacitance of the touch key is increased. Therefore, the touch action can be detected by measuring the change of the distributed capacitance on the touch key.

At present, a capacitive touch key is widely applied to various electronic products, in order to achieve safety, beauty and other factors, a layer of insulating cover such as glass is placed on the capacitive touch key to serve as a panel, and a human body performs touch operation through the panel and the capacitive touch key.

In the actual production of the capacitance touch key, a key detection link is provided, in order to ensure that the key works normally during detection, the panel needs to be tightly assembled with the capacitance touch key, and no gap can be left between components. Fig. 1 is a schematic structural diagram of a conventional capacitive touch key assembly for an electrical appliance. As shown in fig. 1, the electrical appliance 100 includes a panel 110 and a capacitive touch key assembly 120. The capacitive touch key assembly 120 includes a spring 121, an indicator lamp 122, and a circuit board 123. When a user's finger touches the panel, the capacitive touch key assembly 120 transmits a sensing signal of the user's finger to the touch detection circuit on the circuit board 123 through the spring 121, and the indicator lamp 122 is disposed in the middle of the spring and used for emitting light to indicate the user when the sensing signal is detected by the touch detection circuit. In order to ensure the normal operation of the capacitive touch key assembly 120, the panel 110 and the capacitive touch key assembly 120 must be tightly assembled together, and there is no air gap between the panel 110 and the capacitive touch key assembly 120. The assembly link is usually the last link of the whole machine assembly, so if the detection result shows that the operation of the keys is abnormal, the phenomenon of reworking after the whole machine assembly can occur, and the problems of low detection sensitivity, low assembly work efficiency, high assembly part damage rate, high assembly cost and the like can be caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an electric appliance and electric capacity touch key subassembly thereof are provided, can debug electric capacity touch key subassembly alone under this condition of not assembling with electric appliance.

The utility model discloses a solve above-mentioned technical problem and the technical scheme who adopts provides an electric capacity touch key subassembly, including circuit board, touch-control sensing electrode, casing and electric conductor. The touch sensing electrode is arranged on the upper surface or the lower surface of the circuit board. The shell covers the circuit board to form an accommodating space. The conductor is arranged in the accommodating space and coupled with the touch sensing electrode.

In an embodiment of the present invention, the touch sensing electrode is disposed on the upper surface of the circuit board, and the conductive body contacts the touch sensing electrode.

In another embodiment of the present invention, the touch sensing electrode is disposed on a lower surface of the circuit board, and the electrical conductor is coupled to the touch sensing electrode through the circuit board.

In an embodiment of the present invention, the housing has an inner upper wall and an inner side wall, and the electric conductor is in contact with the inner upper wall of the housing.

In another embodiment of the present invention, the housing has an inner upper wall and an inner side wall, and the conductor has a gap with the inner upper wall of the housing.

In an embodiment of the present invention, the touch sensing electrode is planar or annular, and the cross section of the conductive body is annular.

In an embodiment of the present invention, the electric conductor is a cylindrical ring or a spring.

In an embodiment of the present invention, when the human finger presses the casing, the total capacitance of the touch sensing electrode is less than 0.5 pf.

The utility model also provides an electrical apparatus, including panel and the electric capacity touch key subassembly of saying in any above-mentioned embodiment, this electric capacity touch key subassembly is located under the panel.

In an embodiment of the present invention, a gap is formed between the capacitive touch key assembly and the panel.

The utility model discloses owing to adopt above technical scheme, make it compare with prior art, have following apparent advantage: the detection sensitivity of the capacitance touch key assembly is improved, the keys can be detected without complete machine assembly, air gaps can be reserved among the key internal assemblies, the process difficulty of component assembly during detection is reduced, the damage rate of the assembled components is reduced, the assembly cost is reduced, and meanwhile, the assembly work efficiency is improved.

Drawings

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

fig. 1 is a schematic structural diagram of a conventional capacitive touch key assembly for an electrical appliance.

Fig. 2 is a schematic structural diagram of a capacitance touch key assembly for an electrical appliance according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a capacitive touch key assembly for an electrical appliance according to another embodiment of the present invention.

Fig. 4 is a schematic diagram of an internal structure of the capacitive touch key assembly in fig. 3.

Fig. 5 is another schematic structural diagram of the capacitive touch key assembly of the electrical appliance in fig. 2.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited by the specific embodiments disclosed below.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary words "below" and "beneath" can encompass both an orientation of up and down. The device may have other orientations (rotated 90 degrees or at other orientations) and the spatial relationship descriptors used herein should be interpreted accordingly. Further, it will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

In the context of this application, a structure described as having a first feature "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.

It will be understood that when an element is referred to as being "on," "connected to," "coupled to" or "contacting" another element, it can be directly on, connected or coupled to, or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to" or "directly contacting" another element, there are no intervening elements present. Similarly, when a first component is said to be "in electrical contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and/or other components that allow current to flow even without direct contact between the conductive components.

Furthermore, each embodiment described below has one or more technical features, which does not mean that all technical features of any embodiment need to be implemented simultaneously by a person using the present invention, or that all technical features of different embodiments can be implemented separately. In other words, in the implementation of the present invention, based on the disclosure of the present invention, and depending on design specifications or implementation requirements, a person skilled in the art can selectively implement some or all of the technical features of any embodiment, or selectively implement a combination of some or all of the technical features of a plurality of embodiments, thereby increasing the flexibility in implementing the present invention.

The utility model discloses on prior art's basis, provide a new with electrical apparatus and electric capacity touch key subassembly, can make electric capacity touch key subassembly's detectivity higher, more convenient. Fig. 2 is a schematic structural diagram of a capacitance touch key assembly for an electrical appliance according to an embodiment of the present invention. As shown in fig. 2, the electrical appliance 200 includes a panel 210 and a capacitive touch key assembly 220. The panel 210 is used to protect the capacitive touch keys, and has an aesthetic function, and the material thereof may be an insulating object such as glass or organic glass. There is a gap, which may be an air gap, between the capacitive touch key assembly 220 and the panel 210. Capacitive touch key assembly 220 includes circuit board 221, touch sensing electrode 222, housing 223, electrical conductor 224, and indicator light 225. The touch sensing electrode 222 is disposed on the upper surface or the lower surface of the circuit board 221. The upper surface and the lower surface of the circuit board can be provided with one or more touch sensing electrodes, and one key corresponds to one touch sensing electrode under general conditions according to the number of keys contained in the electrical appliance. In fig. 2 of the present embodiment, the electrical appliance 200 shown includes a key, and the touch sensing electrode 222 is disposed on the lower surface of the circuit board 221 in fig. 2. When the touch sensing electrode 222 is disposed on the lower surface of the circuit board 221, the conductive body 224 is coupled to the touch sensing electrode 222 through the circuit board 221. In another embodiment of the present invention, the touch sensing electrode 222 can also be disposed on the upper surface of the circuit board 221. Fig. 3 is a schematic structural diagram of a capacitive touch key assembly for an electrical appliance according to another embodiment of the present invention. As shown in fig. 3, the electrical appliance 300 includes a panel 310 and a capacitive touch key assembly 320. When the touch sensing electrode 322 is disposed on the upper surface of the circuit board 321, the conductive body 324 contacts the touch sensing electrode 322. Capacitive touch key assembly 320 includes circuit board 321, touch sensing electrode 322, housing 323, electrical conductor 324, and indicator light 325. Here, the indicator lamps 225 and 325 are used to illuminate the key buttons. In some embodiments, indicator lights 225 and 325 may be omitted.

The touch sensing electrode 222, the housing 223 and the conductive body 224 are specifically described below with reference to fig. 2, and the corresponding portions in fig. 3 and fig. 2 may be similar to fig. 2, and are not repeated herein. The touch sensing electrode 222 is used to detect a capacitance change of the capacitive touch key assembly 220, and the touch sensing electrode 222 may be made of a copper foil or a sheet of other conductive material. The touch sensing electrodes 222 may be distributed on the circuit board 221 in a planar or annular shape. The case 223 is an insulator covering the circuit board 221 to form an accommodating space for covering the circuit board 221, the touch sensing electrodes 222, the conductive bodies 224 and the indicator lamps 225, and one case may cover a plurality of touch sensing electrodes, conductive bodies and indicator lamps. The housing 223 has an inner upper wall 223a and an inner side wall 223b, and the conductive body 224 has a gap, which may be an air gap, with the inner upper wall 223a of the housing 223. In some embodiments, electrical conductor 224 is in contact with an inner upper wall 223a of housing 223, as shown with particular reference to fig. 5. By covering and assembling the circuit board 221, the touch sensing electrode 222, the conductor 224 and the indicator lamp 225 with the casing 223, the capacitive touch key assembly 220 can be individually tested without being integrally assembled with the panel 210. The conductive body 224 is used for conducting capacitance change of the capacitive touch key assembly 220, the conductive body 224 is made of a material with conductive property, the conductive body 224 is a cylindrical ring, and the cross section of the conductive body 224 is annular. In some embodiments, conductive body 224 may be a spring, and the cylindrical ring or spring may each have a height. The conductive body 224 is disposed above the corresponding touch sensing electrode 222. In order to indicate the working state of the user key, in this embodiment, an indicator lamp 225 is disposed above the touch sensing electrode 222 for aesthetic purposes, and the indicator lamp 225 may be an LED lamp. In other embodiments, other devices with the function of indicating the user or no indicating device can be adopted, and the requirements of the user and the electrical appliance can be determined.

The internal structure of the capacitive touch key assembly is specifically described below with reference to fig. 3 and 4. Fig. 4 is a schematic diagram of an internal structure of the capacitive touch key assembly in fig. 3. As shown in fig. 4, the internal structure of the capacitive touch key assembly 320 includes a circuit board 321, a touch sensing electrode 322, a conductor 324 and an indicator 325. The upper surface of the circuit board 321 includes a touch sensing electrode 322, and the touch sensing electrode 322 is covered on the upper surface of the circuit board 321 in a circular ring shape. The conductive body 324 is a metal ring, and the conductive body 324 is disposed above the corresponding touch sensing electrode 322. The indicator 325 is disposed between the touch sensing electrode 322 and the conductive body 324, and plays a role of aesthetic appearance and light-emitting indication for users.

According to the above description of the different embodiments of the present invention, the present invention provides an air gap between the panel and the capacitor touch key assembly and between the circuit board, the casing and the electric conductor, which is described below with reference to fig. 2. As shown in fig. 2, there is a gap between capacitive touch key assembly 220 and panel 210, a gap between circuit board 221 and housing 223, and a gap between housing 223 and conductor 224. These gaps may be air gaps that constitute capacitors that are connected to form a series connection of capacitors. When the human finger presses the casing 223, the total capacitance (i.e. the series capacitance) from the human finger to the touch sensing electrode 222 is less than 0.5 pf. Because the total capacitance value is small, the conductor 224 is used to conduct the capacitance change of the capacitive touch key assembly 220, and thus the requirement for the conductivity of the material of the conductor 224 is not high. In some embodiments, circuit board 221, housing 223, and electrical conductor 224 are in contact with one another, and there is a gap between electrical conductor 224 and an inner sidewall 223b of housing 223, which may be an air gap, as shown with particular reference to fig. 5.

The utility model provides an with electrical apparatus and electric capacity touch key subassembly thereof has following advantage for prior art:

(1) the sensitivity of key detection is improved, and the key detection is more convenient. The panel does not need to be assembled with the capacitor touch key assembly, the keys can be detected, and the phenomenon that the assembly and disassembly of the whole machine are reworked due to the fact that the abnormal operation of the keys is detected is avoided.

(2) The requirements of the assembly process are reduced. The utility model provides an electric capacity touch key subassembly's inner structure can have the clearance, does not need part and part closely to laminate, has reduced the equipment degree of difficulty. Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Similarly, it should be noted that in the preceding description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.

Although the present invention has been described with reference to the present specific embodiments, it will be understood by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes and substitutions may be made without departing from the spirit of the present invention, and therefore, changes and modifications to the above embodiments within the spirit of the present invention will fall within the scope of the claims of the present application.

Claims (10)

1. A capacitive touch key assembly, comprising:

a circuit board;

the touch sensing electrode is arranged on the upper surface or the lower surface of the circuit board;

a housing covering the circuit board to form an accommodating space;

and the conductor is arranged in the accommodating space and coupled with the touch sensing electrode.

2. The capacitive touch key assembly of claim 1, wherein the touch sensing electrode is disposed on an upper surface of the circuit board, and the conductive body contacts the touch sensing electrode.

3. The capacitive touch key assembly of claim 1, wherein the touch sensing electrode is disposed on a lower surface of the circuit board, and the conductor is coupled to the touch sensing electrode through the circuit board.

4. The capacitive touch key assembly of any one of claims 1-3, wherein the housing has an inner top wall and an inner side wall, and the electrical conductor is in contact with the inner top wall of the housing.

5. The capacitive touch key assembly of any one of claims 1-3, wherein the housing has an inner top wall and an inner side wall, and wherein the conductor has a gap with the inner top wall of the housing.

6. The capacitive touch key assembly of claim 1, wherein the touch sensing electrode is planar or annular, and the cross-section of the conductive body is annular.

7. The capacitive touch key assembly of claim 1, wherein the conductive body is a cylindrical ring or a spring.

8. The capacitive touch key assembly of claim 1, wherein when a human finger presses the casing, a total capacitance from the human finger to the touch sensing electrode is less than 0.5 pf.

9. An electrical appliance, comprising:

a panel;

the capacitive touch key assembly of any of claims 1-8, disposed below the faceplate.

10. The consumer of claim 9, wherein a gap is provided between the capacitive touch key assembly and the panel.

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