CN114793255A

CN114793255A - Electronic equipment and key touch control assembly thereof

Info

Publication number: CN114793255A
Application number: CN202110099135.8A
Authority: CN
Inventors: 张坤
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2022-07-26

Abstract

The application provides an electronic device and a key touch control assembly thereof; the key touch control assembly comprises a circuit board and a touch control switch; the touch switch is electrically connected with the circuit board and is bonded with the circuit board through a glue layer; the adhesive layer is located between the touch switch and the circuit board. The key touch control assembly provided by the embodiment of the application; through changing the point of touch switch's on the circuit board point glue into the back at touch switch, the side key FPC can narrow to with dabbing switch side parallel and level, does not need the some glue width that conventional scheme salient touch switch, can make the whole width of circuit board narrow than original scheme. The structural design space of the relevant area of the electronic equipment is increased. The holding feeling of the whole machine is increased, and the light and thin design of the whole machine is facilitated; in addition, because the space of the FPC area of the side key is more, the related matched shell has space feeding reinforcement, and the strength of the whole structure is improved.

Description

Electronic equipment and key touch control assembly thereof

Technical Field

The invention relates to the technical field of side key structures of electronic equipment, in particular to electronic equipment and a key touch component thereof.

Background

For electronic devices such as mobile phones and tablet computers, the side key is a common design structure. In order to prevent water for a DOME type touch switch on a side key FPC (Flexible Printed Circuit) of a mobile phone and avoid failure caused by corrosion of liquid on a welding pin of a short-Circuit switch, a common mode is to point a circle of glue on the periphery of the front side of the touch switch, and the glue covers a sealing switch welding pad area after being cured, so that a waterproof effect is achieved.

In the technical scheme of coating glue on the periphery of the tact switch, the width of at least 0.2mm needs to be in the FPC plane, otherwise, the glue cannot be effectively adhered and cured on the periphery of the tact switch, and the effective waterproof sealing cannot be realized. With the development of light and thin electronic equipment represented by a mobile phone, the space is more and more tense, the width of a side key FPC is a bottleneck in the thickness direction of the mobile phone, and in most cases, whether the thickness of the whole machine can be thinned is directly determined. The width of 0.4mm (single side is 0.2mm X2) required by the dispensing sealing waterproof performance greatly influences the thickness of the whole mobile phone and the design of the side surface appearance radian, and the expressive force of the whole mobile phone is greatly reduced.

Disclosure of Invention

A first aspect of an embodiment of the present application provides a key touch component, where the key touch component includes a circuit board and a touch switch; the touch switch is electrically connected with the circuit board and is bonded with the circuit board through an adhesive layer; the adhesive layer is located between the touch switch and the circuit board.

In addition, this application embodiment provides an electronic equipment again, electronic equipment includes casing, button touch-control subassembly and any one of the above-mentioned embodiment the button touch-control subassembly, the casing is formed with the accommodation space, button touch-control subassembly is located in the accommodation space, the casing is equipped with the through-hole in the position that corresponds the accommodation space, the button cap is inserted and is located the through-hole, the one end of button cap expose in the casing, the other end can with button touch-control subassembly's touch switch butt.

The electronic equipment and the key touch control assembly thereof provided by the embodiment of the application; the dispensing of the DOME type touch switch (touch switch) on the side key FPC (circuit board) is changed to the back of the touch switch, the side key FPC can be narrowed to be parallel and level with the side of the touch switch, the dispensing width of the touch switch does not need to be protruded by a conventional scheme, and the whole width of the circuit board can be narrowed compared with the original scheme. The structural design space of the relevant area of the electronic equipment is increased. The design scheme enables the space of the side surface of the whole machine to be more, the radian of the side surface can be made to be more rounded, the holding feeling of the whole machine is favorably increased, and the light and thin design of the whole machine is favorably realized; in addition, as the space of the FPC area of the side key is more, the space of the related matched shell is reinforced, which is beneficial to improving the strength of the whole structure; the whole width of the side key FPC in the touch switch area is narrowed, the total area of the side key FPC is reduced, the splicing rate of the FPC can be increased, and the material cost of the FPC is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic front view of a structure of an embodiment of a key touch device before improvement;

FIG. 2 is a schematic cross-sectional view of the key touch assembly at A-A in the embodiment of FIG. 1;

FIG. 3 is a schematic front view illustrating a structure of a key touch assembly according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of the embodiment of FIG. 3 showing a key touch device at a location B-B;

FIG. 5 is a schematic diagram illustrating a structure of a key touch device in the embodiment of FIG. 3;

FIG. 6 is a schematic diagram illustrating a partial structure split of the key touch device in the embodiment of FIG. 3;

FIG. 7 is a schematic front view of another embodiment of a key touch assembly according to the present application;

FIG. 8 is a schematic cross-sectional view of the key touch assembly at C-C in the embodiment of FIG. 7;

FIG. 9 is a schematic diagram illustrating a split structure of the key touch device in the embodiment of FIG. 7;

FIG. 10 is a schematic diagram of a back side structure of the key touch device in the embodiment of FIG. 7;

FIG. 11 is a schematic overall structure diagram of an embodiment of the electronic device of the present application;

FIG. 12 is an enlarged view of a portion of the structure at D in FIG. 11;

FIG. 13 is a schematic cross-sectional view of the structure at E-E in FIG. 12;

FIG. 14 is a schematic view of FIG. 12, with the structure broken away;

fig. 15 is a block diagram illustrating a structural configuration of an embodiment of an electronic device according to the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Likewise, the following examples are only some examples, not all examples, and all other examples obtained by those skilled in the art without any inventive work are within the scope of the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

Referring to fig. 1 and fig. 2 together, fig. 1 is a schematic structural front view of an embodiment of a key touch device before improvement, and fig. 2 is a schematic structural sectional view of the key touch device at a-a in the embodiment of fig. 1; in the technical scheme before improvement, glue 3 needs to be coated on the periphery of the tact switch 2, so that the tact switch 2 is bonded with the circuit board 1 (side key FPC). The periphery of the tact switch 2 needs to have a minimum plane width W1 of 0.2mm, otherwise, the glue 3 cannot be effectively adhered and cured on the periphery of the tact switch 2, and cannot be effectively sealed in a waterproof manner. With the development of the light and thin mobile phone, the space is more and more tight, the whole width of the side key FPC (W2 in fig. 1) in the thickness direction of the mobile phone (i.e. the width direction of the side key FPC, the arrow direction in fig. 1) is a bottleneck, and in most cases, it is directly determined whether the thickness of the whole mobile phone can be reduced. The width of 0.4mm (the single-side width W1 (taking 0.2mm as an example) is multiplied by 2) required by dispensing, sealing and water proofing greatly influences the thickness of the whole mobile phone and the design of the side surface appearance radian, and the expressive force of the whole mobile phone is greatly reduced.

In view of the above problems, an embodiment of the present invention provides a key touch device, please refer to fig. 3 to 5 together, fig. 3 is a schematic structural front view of an embodiment of the key touch device according to the present invention; FIG. 4 is a schematic cross-sectional view of the key touch assembly at B-B in the embodiment of FIG. 3; fig. 5 is a schematic diagram illustrating a structure of the key touch device in the embodiment of fig. 3 in a disassembled manner. It should be noted that the key touch component in the embodiment of the present application is used for an electronic device, and the electronic device may include an electronic device having a key, such as a mobile phone, a tablet computer, a notebook computer, a bluetooth sound box, an earphone, a watch, and a wearable device. The key touch assembly 10 for an electronic device includes a circuit board 100 and a touch switch 200. It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

Specifically, the touch switch 200 is electrically connected to the circuit board 100 and is bonded to the circuit board 100 through a glue layer 300; the adhesive layer 300 is located between the touch switch 200 and the circuit board 100.

In the length direction (arrow direction in fig. 1) of the circuit board 100, the side of the circuit board 100 is parallel to the side of the touch switch 200. Referring to fig. 6, fig. 6 is a schematic diagram illustrating a partial structure of the key touch assembly in the embodiment of fig. 3, wherein the adhesive layer 300 in the embodiment does not protrude from a side of the touch switch 200 parallel to the circuit board 100. The other two sides of the touch switch 200 may be provided with an adhesive layer, because the influence on the overall width of the key touch assembly is not involved. Optionally, the Circuit board 100 may be a Flexible Printed Circuit (FPC).

The key touch control assembly provided by the embodiment; by changing the dispensing of the DOME type tact switch (i.e., the touch switch 200) on the side key FPC (i.e., the circuit board 100) to the back of the touch switch, the side key FPC can be narrowed to be flush with the side of the tact switch, and the conventional scheme is not required to protrude the dispensing width (the width of W1 in FIG. 1) of the touch switch, so that the whole width W3 of the key touch component can be narrowed compared with the original scheme. The structural design space of the relevant area of the electronic equipment is increased. The design scheme enables the space of the side surface of the whole machine to be more, the radian of the side surface can be made to be more rounded, the holding feeling of the whole machine is favorably increased, and the light and thin design of the whole machine is favorably realized; in addition, as the space of the FPC area of the side key is more, the space of the related matched shell is reinforced, which is beneficial to improving the strength of the whole structure; the whole width of the side key FPC in the touch switch area is narrowed, the total area of the side key FPC is reduced, the splicing rate of the FPC can be increased, and the material cost of the FPC is reduced.

Referring to fig. 7 to 9, fig. 7 is a schematic structural front view of another embodiment of the key touch assembly of the present application; FIG. 8 is a cross-sectional view of the key touch device at C-C in the embodiment of FIG. 7; FIG. 9 is a schematic diagram illustrating a structure of a key touch device shown in FIG. 7; the key touch device in this embodiment also includes a circuit board 100 and a touch switch 200. The touch switch 200 is electrically connected to the circuit board 100 and is bonded to the circuit board 100 through a glue layer 300; the adhesive layer 300 is located between the touch switch 200 and the circuit board 100. In the length direction (arrow direction in fig. 7) of the circuit board 100, the side of the circuit board 100 is parallel to the side of the touch switch 200.

Different from the previous embodiment, in the present embodiment, an inward-concave notch 110 is disposed on a parallel side of the circuit board 100 and the touch switch 200, so that the width of the circuit board 100 at the position of the inward-concave notch 110 is smaller than the width of the touch switch 200; the tact switch 200 covers the adduction notch 110.

Referring to fig. 10, fig. 10 is a schematic diagram of a back structure of the key touch assembly in the embodiment of fig. 7, optionally, the inward-closing slits 110 are respectively disposed on two opposite parallel sides of the circuit board 100 and the touch switch 200, a depth D of each inward-closing slit 110 is in a range of 0.1-1.5mm, specifically, 0.1mm, 0.2mm, 0.3mm, 0.45mm, 0.5mm, and the like, and a designer may consider a design according to comprehensive factors such as strength of the circuit board 100 and a size of a space saving, which is not limited herein. In this embodiment, the inward-concave notch is formed instead of the whole side of the circuit board 100, because the structural strength and size of the soldering position between the touch switch 200 and the circuit board 100 need to be considered, the inward-concave notch 110 is formed at the position corresponding to the middle of the touch switch 200. The design structure can ensure the strength of a welding structure of the touch switch 200 and the circuit board 100 on one hand, and on the other hand, the structural space is fully utilized, the width of the local position of the touch component of the small key is small, and more space is reserved for the FPC area of the side key. It should be noted that the terms "first", "second" and "third" in the embodiments of the present application 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," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Referring to fig. 7 to 10, the key touch assembly in the present embodiment further includes a reinforcing plate 400, wherein the reinforcing plate 400 is attached to the circuit board 100 and is located on a side of the circuit board 100 opposite to the touch switch 200. The reinforcing plate 400 is at least arranged corresponding to the area of the circuit board 100 where the touch switch is arranged, and the outline shape of the reinforcing plate 400 is correspondingly the same as the area of the circuit board 100 where the touch switch 200 is arranged; the reinforcing plate 400 is provided with a reinforcing slit 410 corresponding to the inward closing slit 110 of the circuit board 100.

Fig. 11 and 12 are also referenced, fig. 11 is a schematic overall structure diagram of an embodiment of the electronic device of the present application, and fig. 12 is an enlarged schematic partial structure diagram of a position D in fig. 11; it should be noted that the electronic device in the embodiment of the present application may include any electronic device with a key, such as a mobile phone, a tablet computer, a notebook computer, a bluetooth speaker, an earphone, a watch, and a wearable device, where the embodiment is illustrated by taking the mobile phone as an example.

Optionally, referring to fig. 13 and fig. 14 together, fig. 13 is a schematic cross-sectional view of a structure at a position E-E in fig. 12, and fig. 14 is a schematic structural split view of fig. 12, where the electronic device includes a housing 20, a key cap 30, and a key touch assembly 10. The housing 20 forms an accommodating space 1000, and the key touch device 10 is disposed in the accommodating space 1000, wherein the key touch device 10 may be any one of the foregoing embodiments, and please refer to the description of the foregoing embodiments for the detailed structure. It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiments of the present application are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

The casing 20 is provided with a through hole 2000 at a position corresponding to the accommodating space 1000, the key cap 30 is inserted into the through hole 2000, one end of the key cap 30 is exposed out of the casing 20, and the other end of the key cap can abut against the touch switch 200 of the key touch assembly 10. The number of the key caps 30 may be one or more (a plurality of key caps 30 may be of a connected structure or an independent structure), and the number of the through holes 2000 corresponding to the number of the key caps may also be one or more, and the detailed structural features of this part are not specifically limited here.

Optionally, the housing 20 includes a front shell 210 and a rear shell 220, the front shell 210 cooperates with the rear shell 220 to form the accommodating space 1000 at a side position of the electronic device, and the through hole 2000 is disposed on the rear shell 220. In addition, the electronic device further includes a display screen assembly 40 and a rear cover plate (or battery cover) 50, wherein the display screen assembly 40 may be cooperatively connected with the front housing 210, and the rear cover plate 50 may be cooperatively connected with the rear housing 220. The detailed structural features of this section are within the understanding of those skilled in the art and will not be described herein.

Referring to fig. 15, fig. 15 is a block diagram illustrating a structural composition of an embodiment of an electronic device according to the present application, where the electronic device may be a mobile phone, a tablet computer, a notebook computer, a wearable device, and the like, and the embodiment illustrates a mobile phone as an example. The electronic device may have a structure including an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (i.e., the display screen assembly 40 in the above-described embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980, a power supply 990, and the like. Wherein the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected with the processor 980; power supply 990 is operative to provide power to the entire electronic device 10.

Specifically, the RF circuit 910 is used for transmitting and receiving signals; the memory 920 is used for storing data instruction information; the input unit 930 is used for inputting information, and may specifically include a touch panel 931 and other input devices 932 such as operation keys; the display unit 940 may include a display panel 941; the sensor 950 includes an infrared sensor, a laser sensor, etc. for detecting a user approach signal, a distance signal, etc.; a speaker 961 and a microphone 962 are connected to the processor 980 through the audio circuit 960 for emitting and receiving sound signals; the wifi module 970 is used for receiving and transmitting wifi signals, and the processor 980 is used for processing data information of the electronic device. For specific structural features of the electronic device, please refer to the related description of the above embodiments, and detailed descriptions thereof will not be provided herein.

The electronic equipment that this application embodiment provided, its button touch-control subassembly changes the point of DOME type dabbing switch (touch-control switch) into at touch-control switch's back through the point with on the side key FPC (circuit board), and side key FPC can narrow down with dabbing switch side parallel and level, does not need the point of conventional scheme salient touch-control switch to glue the width, can make the whole width of circuit board narrow than original scheme. The structural design space of the relevant area of the electronic equipment is increased. The design scheme enables the space of the side surface of the whole machine to be more, the radian of the side surface can be made to be more rounded, the holding feeling of the whole machine is favorably increased, and the light and thin design of the whole machine is favorably realized; in addition, because the space of the FPC area of the side key is more, the related matched shell has space feeding reinforcement, which is beneficial to improving the strength of the whole structure; the whole width of the side key FPC in the light touch switch area is narrowed, the total area of the side key FPC is reduced, the splicing rate of the FPC can be increased, the material cost of the FPC is reduced, and the total cost of the electronic equipment is further reduced.

The above description is only a part of the embodiments of the present invention, and not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes performed by the contents of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are all included in the scope of the present invention.

Claims

1. A key touch control assembly is characterized by comprising a circuit board and a touch control switch; the touch switch is electrically connected with the circuit board and is bonded with the circuit board through an adhesive layer; the adhesive layer is located between the touch switch and the circuit board.

2. The key touch assembly of claim 1, wherein, in the length direction of the circuit board, the side of the circuit board is parallel to the side of the touch switch; the adhesive layer does not protrude from the side edge of the touch switch parallel to the circuit board.

3. The key touch assembly according to claim 2, wherein an inward-concave notch is formed on a side of the circuit board parallel to the touch switch, so that the width of the circuit board at the position of the inward-concave notch is smaller than the width of the touch switch; the touch switch covers the inward-closing gap.

4. The key touch assembly according to claim 3, wherein the inward-concave notches are formed on two opposite sides of the circuit board parallel to the touch switch.

5. The key touch assembly of claim 4, wherein the depth of the adduction breach is in the range of 0.1-1.5 mm.

6. The key touch assembly of claim 3, wherein the circuit board is a flexible circuit board.

7. The key touch assembly according to claim 6, further comprising a stiffener attached to the circuit board and located on a side of the circuit board opposite to the touch switch.

8. The key touch assembly according to claim 6, wherein the stiffener is disposed at least corresponding to an area of the circuit board where the touch switch is disposed, and the outline shape of the stiffener is the same as the outline shape of the area of the circuit board where the touch switch is disposed; the reinforcing plate is provided with a reinforcing gap corresponding to the inward-closing gap of the circuit board.

9. An electronic device, comprising a housing, a key cap, and the key touch assembly of any one of claims 1-8, wherein the housing forms an accommodating space, the key touch assembly is disposed in the accommodating space, the housing is provided with a through hole at a position corresponding to the accommodating space, the key cap is inserted into the through hole, one end of the key cap is exposed out of the housing, and the other end of the key cap can abut against a touch switch of the key touch assembly.

10. The electronic device of claim 9, wherein the housing comprises a front shell and a rear shell, the front shell and the rear shell cooperate to form the accommodating space at a side position of the electronic device, and the through hole is disposed on the rear shell.