CN107026039B

CN107026039B - Key assembly and electronic device

Info

Publication number: CN107026039B
Application number: CN201710374391.7A
Authority: CN
Inventors: 张朝扬
Original assignee: Nanjing Baixia High Tech Industrial Park Investment Development Co Ltd
Current assignee: Nanjing Baixia High Tech Industrial Park Investment Development Co Ltd
Priority date: 2017-05-24
Filing date: 2017-05-24
Publication date: 2020-06-09
Anticipated expiration: 2037-05-24
Also published as: CN107026039A

Abstract

The invention discloses a key assembly and an electronic device, wherein a waterproof part is arranged between a circuit board and a shell, the waterproof part comprises a flexible sealing part fixed on the inner side of the shell and a fixing panel tightly pressing the flexible sealing part on the inner side of the shell, and the flexible sealing part is used for sealing a first through hole of the shell so as to isolate the communication of the first through hole on the inner side and the outer side of the shell. According to the key assembly, the keys are isolated from the interior of the mobile phone shell through the waterproof part, so that water can be prevented from entering the mobile phone through the waterproof part even if the keys are pressed, and the waterproof performance of the keys of the mobile phone shell is improved.

Description

Key assembly and electronic device

Technical Field

The present invention relates to the field of waterproof technologies, and in particular, to a waterproof key assembly and an electronic device having the same.

Background

Waterproof mobile phones are more and more on the market at present, and the waterproof mobile phones are more and more concerned by consumers. At present, a waterproof mobile phone can be placed in water, water cannot enter the mobile phone, but the mobile phone cannot be placed in water, and key operation can be carried out on the mobile phone. The keys of a common mobile phone can prevent water from entering the mobile phone from the surface of the mobile phone, but when the keys of the mobile phone are pressed down, a gap is formed between the keys and the inside of the mobile phone, and at the moment, the water can permeate into the inside of the mobile phone, so that the keys of the mobile phone can not be operated in water even if the mobile phone can be waterproof.

In view of the above-mentioned drawbacks, it is necessary to provide a new waterproof key assembly.

Disclosure of Invention

The invention mainly aims to provide a key assembly and an electronic device, and aims to provide a key assembly with good waterproof performance.

In order to achieve the above purpose, the key assembly provided by the present invention includes a casing, a key disposed outside the casing, and a circuit board disposed inside the casing and used for cooperating with the key; the shell is provided with a first through hole, the key comprises a keycap and a trigger part, the keycap and the trigger part are arranged in the first through hole in a sliding manner, and the circuit board is provided with a switch part matched with the trigger part of the key; its characterized in that, the button subassembly is still including setting up the waterproof portion on the casing inside wall, waterproof portion includes:

the flexible sealing part is fixed on the inner side of the shell and used for isolating the first through hole from communicating the two sides inside and outside the shell so as to seal the first through hole, and the trigger part can trigger the switch part of the circuit board at intervals of the flexible sealing part; the fixing panel is fixed on the inner side wall of the shell and used for pressing the soft sealing part on the inner side wall of the shell;

the flexible sealing part comprises an annular first bulge part which is convexly arranged on the side surface, close to the shell, of the flexible sealing part, and the first bulge part abuts against the inner side wall of the shell and surrounds the first through hole.

Preferably, the key is provided with a limiting block for preventing the key from falling off from the first through hole to the outer side of the shell.

Preferably, a gap is formed between one surface of the soft sealing part facing the shell and the inner side wall of the shell, and the limiting block is accommodated in the gap.

Preferably, the flexible sealing part is further provided with a second accommodating cavity matched with the triggering part.

Preferably, a second through hole is formed in the fixing panel, and the trigger portion triggers the switch portion through the second through hole at an interval of the flexible sealing portion.

Preferably, first mounting holes are formed in two sides, close to the second through hole, of the fixing panel, second mounting holes matched with the first mounting holes are formed in the shell, and the first mounting holes and the second mounting holes are matched to enable fixing pieces to penetrate through the fixing panel to fasten the fixing panel on the shell.

Preferably, the flexible sealing portion further includes an annular second protruding portion convexly disposed on a side surface of the flexible sealing portion close to the fixed panel, and the second protruding portion is pressed against the fixed panel by the pressure of the fixed panel and surrounds the second through hole.

Preferably, a mounting groove for mounting the flexible sealing part is formed in one surface of the housing facing the flexible sealing part.

Preferably, the soft sealing part is made of elastic materials.

In addition, the invention also provides an electronic device which comprises the key assembly.

In the technical scheme of the invention, the button assembly is provided with the waterproof part between the circuit board and the shell, the waterproof part comprises the flexible sealing part fixed on the inner side of the shell and the fixing panel pressing the flexible sealing part on the inner side of the shell, and the flexible sealing part is used for sealing the first through hole of the shell so as to isolate the communication of the first through hole on the inner side and the outer side of the shell. According to the key assembly, the keys are isolated from the interior of the mobile phone shell through the waterproof part, so that water can be prevented from entering the mobile phone through the waterproof part even if the keys are pressed, and the waterproof performance of the keys of the mobile phone shell is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 diagram of a hardware structure of a mobile terminal according to various embodiments of the present invention;

fig. 2 is a diagram of a communication network system architecture according to an embodiment of the present invention;

FIG. 3 is an exploded view of a key assembly according to an embodiment of the present invention;

fig. 4 is a schematic view of a partially assembled structure of the key assembly in fig. 3;

FIG. 5 is a sectional view taken along line A-A of FIG. 4;

fig. 6 is a partial front view of fig. 5.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Waterproof part	11d	Second convex part
20	Push-button	12	Fixing panel
				30	Shell body	12a	Second through hole
40	Switch part	12b	First mounting hole
				50	Circuit board	21	Trigger part
60	Nut	22	Key cap
				11	Flexible seal part	23	Limiting block
11a	First convex part	31	First through hole
				11b	First accommodating cavity	32	Second mounting hole
11c	Second containing cavity	33	Mounting groove

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, 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 movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention 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, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

The electronic device may be implemented in various forms. For example, the electronic devices described in the present invention may include mobile terminals such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and fixed terminals such as a Digital TV, a desktop computer, and the like.

The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes each component of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex-Long Term Evolution), and TDD-LTE (Time Division duplex-Long Term Evolution).

WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.

Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.

The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.

In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.

Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.

Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.

The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.

The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving GateWay) 2034, a PGW (PDN GateWay) 2035, and a PCRF (Policy and charging functions Entity) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.

Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.

Based on the above mobile terminal hardware structure and communication network system, the present invention provides various embodiments of the method.

The invention provides a key assembly, and aims to provide a key assembly with good waterproof performance.

Referring to fig. 3 to fig. 6, in an embodiment of the present invention, the key assembly can be used in electronic devices such as a mobile phone, a tablet computer, an e-book reader, and a computer.

In this embodiment, the key assembly includes a casing 30, a key 20 disposed outside the casing 30, and a circuit board 50 disposed inside the casing 30 and configured to cooperate with the key 20; the shell 30 is provided with a first through hole 31, the key 20 comprises a keycap 22 and a trigger part 21, the trigger part 21 is slidably arranged in the first through hole 31, and the circuit board 50 is provided with a switch part 40 matched with the trigger part 21 of the key 20; the key assembly further includes a waterproof portion 10, the waterproof portion 10 including:

the flexible sealing portion 11 is fixed on the inner side of the housing 30, the flexible sealing portion 11 is used for isolating the first through hole 31 from communicating with the inner side and the outer side of the housing 30 so as to seal the first through hole 31, and the triggering portion 21 can trigger the switch portion 40 of the circuit board 50 at intervals of the flexible sealing portion 11; and a fixed panel 12 fixed to an inner side wall of the housing 30, the fixed panel 12 being configured to press the flexible sealing portion 11 against the inner side wall of the housing 30;

the flexible sealing portion 11 includes a first annular protrusion 11a convexly disposed on a side surface of the flexible sealing portion 11 close to the housing 30, and the first protrusion 11a abuts against an inner side wall of the housing 30 and surrounds the first through hole 31.

The key assembly of the present invention is provided with the waterproof part 10 to isolate the key 20 from the inside of the handset case 30, thereby achieving the tight waterproof inside the handset case 30. Meanwhile, the key assembly of the invention can prevent water from entering the mobile phone even if the mobile phone key 20 is operated in water, thereby improving the waterproof performance of the mobile phone.

The structure and the operation principle of the key assembly in the embodiment will be described in detail with reference to fig. 3 to 6.

Specifically, the waterproof part 10 provided on the inner side wall of the housing 30 may completely block water outside the housing 30 from flowing into the inside of the housing 30 through the first through hole 31 at the key 20. The waterproof portion 10 includes a flexible sealing portion 11 and a fixing panel 12, and the flexible sealing portion 11 is tightly pressed against the inner side of the housing 30 by the pressing of the fixing panel 12. Specifically, when the flexible sealing portion 11 is attached to the inner side wall of the housing 30, the fixing panel 12 is pressed against the flexible sealing portion 11 and fixed to the inner side wall of the housing 30 by a fixing member or other fixing means.

The flexible sealing portion 11 includes a first annular protrusion 11a convexly disposed on a side surface of the flexible sealing portion 11 close to the housing 30, and the first protrusion 11a abuts against an inner side wall of the housing 30 and surrounds the first through hole 31. The first protruding portion 11a tightly abuts against the inner side wall of the housing 30, so that when the key 20 is pressed downward, only the portion of the soft sealing portion 11 contacting the trigger portion 21 of the key 20 is recessed toward the inner side of the housing 30, and the first protruding portion 11a is always attached to the inner side wall of the housing 30, and the first protruding portion 11a is annular, and the annular first protruding portion 11a can completely surround the first through hole 31, thereby sealing the outer side of the housing 30 and the inner side of the housing 30, and preventing water from entering the housing 30 from the first through hole 31 of the housing 30. Besides being used for sealing, the flexible sealing portion 11 is also flexible, so that the triggering portion 21 of the key 20 can trigger the switch portion 40 of the circuit board 50 at intervals of the flexible sealing portion 11.

In this embodiment, the first through hole 31 is sealed by the flexible sealing portion 11, so that even when the key 20 is pressed downward, the flexible sealing portion 11 still seals the first through hole 31, thereby tightly isolating the inside of the housing 30 from the outside. And even if the key 20 is pressed in water, water cannot penetrate into the shell 30 from the gap between the key 20 and the shell 30, so that the waterproof performance of the shell 30 is improved.

The flexible sealing portion 11 is preferably made of an elastic material with good elasticity, such as silicone rubber, etc., and is tightly attached to the inner side wall of the housing 30 by virtue of the good elasticity; moreover, since the flexible sealing portion 11 is made of a material with good elasticity, compared with a material with rigidity or a material with high hardness, the adhesion tightness between the flexible sealing portion 11 and the housing 30 can be improved, and the waterproof performance of the flexible sealing portion 11 is improved. Meanwhile, since the flexible sealing portion 11 is made of an elastic material, when the key 20 is pressed downward, the key 20 deforms the flexible sealing portion 11, and when the key 20 is released, the flexible sealing portion 11 will recover the deformation due to the elasticity. When the soft sealing portion 11 returns to its original shape, a force is applied to the key 20 to restore the key 20 to its original position, so that the user can control the touch feeling when pressing the key 20 and prevent the key 20 from sinking in the housing 30.

As a preferred embodiment, the key 20 is provided with a stopper 23 for preventing the key 20 from falling off from the first through hole 31 to the outside of the housing 30. Referring to fig. 4, a stopper 23 is disposed on a surface of the key 20 close to the flexible sealing portion 11, and the stopper 23 can allow the key 20 to be clamped in the first through hole 31. Specifically, the key assembly in this embodiment is installed from the inner side of the casing 30, the key 20 is installed from the inner side of the casing 30 at the first through hole 31, so that the key 20 protrudes from the first through hole 31 to the casing 30, and the stopper 23 of the key 20 can clamp the key 20 at the first through hole 31, so as to prevent the key 20 from falling off from the first through hole 31 to the outside of the casing 30. The stopper 23 has a simple structure, and may be a strip stopper 23, the length of which is greater than the width of the key 20 so that the key 20 is clamped in the first through hole 31; in other embodiments, the stopper 23 may be a protrusion protruding from the outer side of the key 20 to prevent the key 20 from falling out of the housing 30 from the first through hole 31.

Further, a gap is formed between one surface of the flexible sealing portion 11 facing the housing 30 and the inner side wall of the housing 30, and the limiting block 23 is accommodated in the gap. In order to prevent the installation of the stopper 23 from hindering the sealing of the flexible sealing portion 11 to the first through hole 31, a gap is formed between the flexible sealing portion 11 and the inner side wall of the housing 30.

Specifically, the first accommodating cavity 11b may be formed by recessing the first protruding portion 11a toward the soft sealing portion 11, and it should be noted that the first accommodating cavity 11b formed by recessing the annular first protruding portion 11a downward is also an annular accommodating cavity. The first accommodating cavity 11b can enable the limiting block 23 to be matched with the first accommodating cavity 11b when the flexible sealing portion 11 abuts against the inner side wall of the shell 30, so that even if the first protruding portion 11a abuts against the inner side of the shell 30, the flexible sealing portion 11 does not receive a reverse acting force relative to the first protruding portion 11a abutting against the shell 30 because the limiting block 23 abuts against the flexible sealing portion 11. The first accommodating cavity 11b formed by enclosing the first protruding portion 11a provides a certain accommodating space for the limiting block 23, and when the limiting block 23 has a limiting effect on the installation of the key 20, the obstruction of the limiting block 23 on the matching of the soft sealing portion 11 and the shell 30 is reduced, and the compactness of the structure and the waterproofness of the key assembly are improved.

Of course, in other embodiments, in order to ensure that there is a gap between the flexible sealing portion 11 and the inner side wall of the housing 30, a groove may be further formed in the housing 30, which is not specifically limited herein, so as to achieve that there is a gap between the flexible sealing portion 11 and the inner side wall of the housing 30.

Further, a second accommodating cavity 11c matched with the triggering portion 21 is further formed in the flexible sealing portion 11. Referring to fig. 5, the second accommodating cavity 11c is matched with the trigger portion 21 of the key 20, so that when the trigger portion 21 of the key 20 moves along the depth direction of the second accommodating cavity 11c, the trigger portion 21 is provided with a certain movement stroke at the waterproof portion 10, and in the movement stroke, the first protruding portion 11a of the soft sealing portion 11 is always attached to the inner wall of the housing 30, so that even if the trigger portion 21 moves up and down in the cavity of the second accommodating cavity 11c, the first protruding portion 11a and the housing 30 are still tightly sealed, and water is prevented from permeating into the housing 30 from the position.

Of course, in other embodiments, in order to reduce the pressing stroke of the key 20 when triggering the switch unit 40, a protrusion may be further disposed on the soft sealing unit 11 near the switch unit 40, and the protrusion shortens the distance between the soft sealing unit 11 and the switch unit 40, thereby reducing the movement stroke of the key 20, and the switch unit 40 can be triggered by only lightly pressing the key 40, so as to reduce the probability of water entering the mobile phone.

In another embodiment, the fixing panel 12 is provided with a second through hole 12a, and the triggering portion 21 triggers the switch portion 40 through the second through hole 12a at an interval of the flexible sealing portion 11. The fixing panel 12 may be made of a metal material in order to enhance the fixing effect of the waterproof portion 10 inside the housing 30. On the basis, referring to fig. 3 and 6, in order to realize that the trigger part 21 can trigger the switch part 40 of the circuit board 50 at the interval of the flexible sealing part 11, in the present embodiment, a second through hole 12a is formed in the fixed panel 12, and the second through hole 12a corresponds to the first through hole 31, so that the switch part 40 of the circuit board 50 can be directly pressed through the second through hole 12a after the flexible sealing part 11 receives the pressing of the trigger part 21. Thereby ensuring the triggering of the switch portion 40 of the circuit board 50 by the key 20. The second through hole 12a is formed in the fixing panel 12, so that the entire waterproof portion 10 is more compact in structure and the mechanism is more tightly fitted.

It is understood that, in other embodiments, the fixing panel 12 may also be made of an elastic material, and when the triggering portion 21 presses the soft sealing portion 11, the fixing panel 12 is pressed, so as to trigger the switch portion 40.

Preferably, two sides of the fixing panel 12 close to the second through hole 12a are provided with first mounting holes 12b, the housing 30 is provided with second mounting holes 32 matched with the first mounting holes 12b, and the first mounting holes 12b and the second mounting holes 32 are matched for a fixing member to penetrate through to fasten the fixing panel 12 on the housing 30. Referring to fig. 3, the fixing panel 12 is directly mounted to the housing 30 by the nut 60 engaged with the first mounting hole 12b formed therein, and the housing 30 is formed with the second mounting hole 32 engaged with the first mounting hole 2 b. During installation, the nuts 60 are directly tightened into the first and second mounting

holes

12b and 32. After the fixing panel 12 is mounted, the fixing panel 12 tightly presses the flexible sealing portion 11, so that the first protrusion 11a of the flexible sealing portion 11 is tightly attached to the housing 30. The nut 60 is matched with the first mounting hole 12b and the second mounting hole 32, so that the mounting of the fixed panel 12 on the shell 30 is realized, the structure is simple and easy to realize, and the mounting and the dismounting are easy.

Further, the flexible sealing portion 11 further includes an annular second protruding portion 11d convexly disposed on a side surface of the flexible sealing portion 11 close to the fixed panel 12, and the second protruding portion 11d is pressed against the fixed panel 12 by the pressure of the fixed panel 12 and surrounds the second through hole 12 a. The second protruding portion 11d tightly abuts against the fixed panel 12, so that when the key 20 is pressed downward, only the portion of the soft sealing portion 11 contacting with the trigger portion 21 of the key 20 is recessed toward the inner side of the housing 30, and the second protruding portion 11d is always attached to the fixed panel 12, and the attaching portion of the soft sealing portion 11 and the fixed panel is not tilted. And the second protruding part 11d is annular, and the annular second protruding part 11d can completely surround the second through hole 12a, so as to seal the outer side of the housing 30 and the inner side of the housing 30, and prevent water from entering the housing 30 from the second through hole 12a of the housing 30.

In order to improve the adhesion between the fixed panel 12 and the flexible sealing member 11 when the fixed panel 12 is mounted on the housing 30, a mounting groove 34 for mounting the flexible sealing member 11 is formed in the inner side wall of the housing 30. Specifically, referring to fig. 5, when mounting, the flexible sealing member 11 is mounted in the mounting groove 34, so that the height of the flexible sealing member 11 protruding out of the housing 30 near the one surface of the fixing panel 12 can be reduced, thereby making the fixing panel 12 more compact to the housing 30. And the depth of the mounting groove 34 is sufficient to make the second protrusion 11d of the soft sealing part 11 protrude out of the mounting groove 33, so that the second protrusion 11d can be attached to the fixing panel 12. When the fixing panel 12 is fixed on the housing 30, the second protruding portion 11d of the flexible sealing portion 11 is just attached to the fixing panel 12, and the fixing panel 12 is attached to the housing 30 and fixed in the first mounting hole 12b and the second mounting hole 32 by the nut 60, so that the fixing panel 12 is mounted on the housing 30. The casing 30 is provided with an installation groove 33 for installing the soft sealing part 11, so that the whole key assembly is more compact in structure.

The invention also provides an electronic device which comprises the key assembly. Since the structure of the key assembly of the electronic device adopts all the technical solutions of all the embodiments, at least all the advantages brought by the technical solutions of the embodiments are achieved, and details are not repeated herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A key assembly comprises a shell, keys arranged on the outer side of the shell and a circuit board arranged on the inner side of the shell and used for matching the actions of the keys; the shell is provided with a first through hole, the key comprises a keycap and a trigger part, the keycap and the trigger part are arranged in the first through hole in a sliding manner, and the circuit board is provided with a switch part matched with the trigger part of the key; its characterized in that, the button subassembly is still including setting up the waterproof part on the casing inside wall, waterproof part includes:

the flexible sealing part is fixed on the inner side of the shell and used for isolating the first through hole from communicating the two sides inside and outside the shell so as to seal the first through hole, and the trigger part can trigger the switch part of the circuit board at intervals of the flexible sealing part; and

the fixing panel is fixed on the inner side wall of the shell and used for pressing the soft sealing part on the inner side wall of the shell, and the fixing panel is made of elastic materials;

the flexible sealing part comprises an annular first bulge part which is convexly arranged on the side surface, close to the shell, of the flexible sealing part, the first bulge part is propped against the inner side wall of the shell by the pressure of the fixing panel and surrounds the first through hole, and a bulge part is arranged on one surface, close to the switch part, of the flexible sealing part;

the key is provided with a limiting block for preventing the key from falling off from the first through hole to the outer side of the shell; a gap is formed between one surface of the soft sealing part facing the shell and the inner side wall of the shell, and the limiting block is accommodated in the gap; the first bulge is sunken towards the side of the soft sealing part to form a first accommodating cavity, and the limiting block is matched with the first accommodating cavity; the limiting block is a protrusion protruding out of the outer side face of the key so as to prevent the key from falling out of the shell from the first through hole.

2. The key assembly of claim 1, wherein the flexible sealing portion further defines a second cavity for receiving the triggering portion.

3. The key assembly of claim 1, wherein the fixing panel has a second through hole, and the triggering portion triggers the switch portion through the second through hole at an interval of the flexible sealing portion.

4. The key assembly of claim 3, wherein the fixing panel has a first mounting hole, the housing has a second mounting hole matching with the first mounting hole, and the fixing panel is fastened to the housing by a fixing member in cooperation with the first mounting hole and the second mounting hole.

5. The key assembly of claim 3, wherein the flexible sealing portion further includes a second annular protrusion portion protrudingly disposed on a side surface of the flexible sealing portion adjacent to the fixing panel, the second protrusion portion being pressed against the fixing panel by the pressure of the fixing panel and surrounding the second through hole.

6. The key assembly according to any one of claims 1-5, wherein an installation groove for installing the flexible sealing portion is formed on an inner side wall of the housing.

7. The key assembly according to any one of claims 1-5, wherein said soft sealing portion is made of an elastic material.

8. An electronic device, characterized in that the electronic device comprises a key assembly according to any one of claims 1-7.