Patent Description:
The present disclosure relates to the field of communications device technologies, and in particular, to a terminal device.

With the advancement of fifth-generation (<NUM>) technologies, terminal devices have put forward higher requirements on radio frequency and antenna layout environments. As an antenna clearance increases, correspondingly increased antenna springs occupy an area, in which a microphone is originally installed, at a bottom edge of a motherboard. This causes a position of the microphone to be moved further inward, and consequently, the microphone needs to pass through a longer sound guide channel to connect to a sound collecting hole on a device housing. A length of the sound guide channel determines a resonance frequency of the microphone, and an increased length of the sound guide channel causes the microphone to form a relatively sharp resonance peak near the resonance frequency. After the microphone picks up sound, it usually enters a digital-to-analog converter (ADC) for encoding after gain amplification. When the resonance frequency is within a narrowband/broadband operating frequency range of the terminal device, sensitivity near the resonant peak of the microphone exceeds a threshold of the ADC and amplitude limiting is caused, which eventually causes severe recording distortion.

Usually, a dust-proof net with a large acoustic resistance or a plurality of dust-proof nets are selected to reduce the resonance peak, but have a limited effect, and a dust-proof net with a large acoustic resistance increases a risk of hole blocking.

<CIT> discloses a microphone unit (<NUM>). The microphone unit (<NUM>) is provided with a casing (<NUM>) that houses a first oscillation unit (<NUM>) and a second oscillation unit (<NUM>) and that is provided with a first sound hole (<NUM>) and a second sound hole (<NUM>). The casing (<NUM>) contains a mounting section (<NUM>) that has a mounting surface (11a) to which the first oscillation unit (<NUM>) and the second oscillation unit (<NUM>) are mounted, and that is provided with the first sound hole (<NUM>) and the second sound hole (<NUM>) on the back surface (11b) of the mounting surface (11a); and the casing (<NUM>) is provided with a first sound path (<NUM>) that transmits sound waves input from the first sound hole (<NUM>) to one surface of a first oscillation plate (<NUM>) and to one surface of a second oscillation plate (<NUM>), and a second sound path (<NUM>) that transmits sound waves input from the second sound hole (<NUM>) to the other surface of the second oscillation plate (<NUM>). The other surface of the first oscillation plate (<NUM>) faces a hermetically sealed space that is formed within the casing (<NUM>).

The present disclosure discloses a terminal device, so as to solve a problem of relatively poor recording quality caused because a resonance peak cannot be suppressed when a speaker of a terminal device operates.

To solve the foregoing problem, the following technical solutions are used in the present disclosure.

A terminal device is provided, which is defined in claim <NUM>.

The accompanying drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and descriptions thereof are used to explain the present disclosure, and do not constitute any improper limitation on the present disclosure.

To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following clearly and completely describes the technical solutions of the present disclosure with reference to specific embodiments of the present disclosure and the accompanying drawings. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure.

The following describes in detail the technical solutions disclosed in the embodiments of the present disclosure with reference to the accompanying drawings.

Refer to <FIG>. The invention discloses a terminal device. The disclosed terminal device includes a housing <NUM>, a microphone <NUM>, a sound guide support <NUM>, a circuit board <NUM>, and a vibration assembly.

The housing <NUM> is a basic component of the terminal device, and the housing <NUM> can provide an installation foundation for other components of the terminal device. The housing <NUM> is provided with a sound collecting hole <NUM>, which is used by the microphone <NUM> to collect sound. The sound collecting hole <NUM> may be disposed on a plurality of positions of the housing <NUM>. Usually, the housing <NUM> includes a middle frame <NUM>, and the sound collecting hole <NUM> may be disposed in the middle frame <NUM>. Certainly, the sound collecting hole <NUM> may alternatively be disposed on another position of the housing <NUM>. In some embodiments of the present disclosure, a specific position for arrangement of the sound collecting hole <NUM> is not limited.

The sound guide support <NUM> and the circuit board <NUM> are both disposed in the housing <NUM>. Specifically, the sound guide support <NUM> and the circuit board <NUM> may usually be fixed in the housing <NUM>. The sound guide support <NUM> cooperates with the circuit board <NUM> to form a first cavity.

The vibration assembly is disposed between the sound guide support <NUM> and the circuit board <NUM>. The vibration assembly separates the first cavity A formed by the sound guide support <NUM> and the circuit board <NUM> into a sound guide channel A1 and a second cavity A2. The microphone <NUM> is a sound collecting component of the terminal device. The microphone <NUM> is disposed in the housing <NUM>. The microphone <NUM> and the sound collecting hole <NUM> are respectively disposed at both ends of the sound guide channel A1. In a specific working process, sound in an environment of the terminal device can pass through the sound collecting hole <NUM> and the sound guiding channel A1, and is finally transmitted to the microphone <NUM>, so as to implement sound collecting of the microphone <NUM>.

According to the terminal device, first cavity A is formed between the sound guide support <NUM> and the circuit board <NUM>, and the vibration assembly separates the first cavity A into the sound guide channel A1 and the second cavity A2, so that the sound guide channel A1 and the second cavity A2 form a parallel resonant structure. The parallel resonant structure can form notch filtering at a resonant peak of the sound guide channel A1, thereby achieving suppression of the resonant peak. The terminal device solves a problem that relatively poor recording quality caused because a resonance peak cannot be suppressed when a speaker of the terminal device operates.

In an optional scheme, an inner wall of the sound guide channel A1 can be provided with a surface coating, and the surface coating can play a role in loss of excessively high frequency when the sound guide channel A1 resonates. It can be learned from the foregoing description that the terminal device disclosed in some embodiments of the present disclosure can achieve a more balanced microphone frequency response curve and relatively high recording sound quality, and avoid problems of noise, distortion, and the like caused because a resonance peak when the microphone <NUM> is recording is excessively high and consequently exceeds a threshold of an ADC.

As described above, the sound guide support <NUM> cooperates with the circuit board <NUM> to form the first cavity A. There may be a plurality of types of structures of the sound guide support <NUM>. The sound guide support <NUM> is provided with a sound guide groove <NUM>, and the circuit board <NUM> covers a notch of the sound guide groove <NUM>. The circuit board <NUM> and the sound guide groove <NUM> are connected to form the first cavity A. In the foregoing preferred scheme, the structure is relatively simple, and a manner of forming the first cavity A is relatively easy to implement.

To facilitate electrical connection and sound collecting of the microphone <NUM>, the microphone <NUM> is usually disposed on a side, away from the sound guide support <NUM>, of the circuit board <NUM>. The housing <NUM> is provided with a screen assembly <NUM>, and the microphone <NUM> is usually located on an inner side of the screen assembly <NUM>. Specifically, the microphone <NUM> may be fixed through conductive adhesive or soldering on the side, away from the sound guide support <NUM>, of the circuit board <NUM>, so that the circuit board <NUM> implements power supply. In this case, the circuit board <NUM> may be provided with a connecting hole <NUM>, and the microphone <NUM> communicates with the sound guide channel through the connecting hole <NUM>, so as to ensure normal operation of sound collection.

As described above, the vibration assembly is disposed between the sound guide support <NUM> and the circuit board <NUM>, and there are a plurality of manners of mounting the vibration assembly. Refer to <FIG>. The sound guide support <NUM> further has a mounting groove <NUM>, the mounting groove <NUM> intersects the sound guide groove <NUM>, the vibration assembly includes a mounting bracket <NUM> and a vibration plate <NUM>, and the mounting bracket <NUM> is disposed in the mounting groove <NUM>. A portion of the mounting bracket <NUM> extends into the sound guide groove <NUM> through the notch of the sound guide groove <NUM>, the portion of the mounting bracket <NUM> extending into the sound guide groove <NUM> is provided with a mounting hole <NUM>, the mounting hole <NUM> communicates with the sound guide groove <NUM>, and the vibration plate <NUM> blocks the mounting hole <NUM>. The vibration plate <NUM>, the mounting bracket <NUM>, and the circuit board <NUM> seal the notch of the sound guide groove <NUM>, and together with the sound guide groove <NUM>, form the sound guide channel A1. The circuit board <NUM>, the mounting bracket <NUM>, and the vibration plate <NUM> form the second cavity A2. The parts are assembled in the foregoing manner, so that the sound guide channel A1 and the second cavity A2 can be formed more conveniently.

The mounting bracket <NUM> is a groove-shaped structural member, the groove-shaped structural member may be mounted in the mounting groove <NUM>, the mounting groove penetrates the sound guide support, and both ends of the mounting groove <NUM> may be open ends extending to edges of the sound guide support <NUM>. The groove-shaped structural member may be disposed between the circuit board <NUM> and the sound guide support <NUM>, and an area, opposite to the sound guide groove <NUM>, in the groove-shaped structural member may be provided with the mounting hole <NUM>. In this case, the mounting bracket <NUM> using the groove-shaped structural member facilitates forming the second cavity A2, and further, the mounting groove <NUM> of the groove-shaped structural member is a through structure so that a vibration process of the vibrating assembly is vibration without being interfered with by air pressure.

In order to facilitate disassembly and assembly, in an optional scheme, the mounting bracket <NUM> may be fixed in the mounting groove <NUM> in a snap-fit manner. Certainly, the mounting bracket <NUM> can alternatively be fixed in the mounting groove <NUM> through a connecting member (for example, a threaded connecting member).

There are a plurality of manners of cooperation between the vibration plate <NUM> and the mounting hole <NUM>. In an optional scheme, the vibration plate <NUM> may be fixed in a lap joint manner on an edge of the mounting hole <NUM>. Such a lap joint assembly manner is easier to assemble. In order to ensure tightness of the sound guide channel A1, in an optional scheme, a sealing member <NUM> may be disposed between the vibration plate <NUM> and the edge of the mounting hole <NUM>. The sealing member <NUM> can play a role of sealing and avoid a problem that the vibration plate <NUM> is not tightly sealed.

There may be a plurality of types of structures of the sealing member <NUM>. In an optional scheme, the sealing member <NUM> may include a sealing tape and foam, and the vibration plate <NUM> blocks the mounting hole <NUM> through the sealing tape and the foam. The foam can support the vibration plate <NUM> for up and down vibrations. Specifically, the sealing tape and the foam may be bonded and fixed, and finally the vibration plate <NUM> is bonded to the edge of the mounting hole <NUM>.

Certainly, the vibration plate <NUM> may alternatively be mounted in another way. Refer to <FIG>. In an optional scheme, an area of the vibration plate <NUM> may be smaller than an area of the mounting hole <NUM>, and the vibration plate <NUM> is covered with a sound film <NUM>. The vibration plate <NUM> may be fixed on the mounting bracket <NUM> through the sound film <NUM>, and an entirety formed by the vibration plate <NUM> and the sound film <NUM> blocks the mounting hole <NUM>. In this case, the vibration plate <NUM> is more similar to a mass block, so that the entirety formed by the vibration plate <NUM> and the sound film <NUM> has an obvious vibration effect, achieving a better resonance peak suppression effect.

In an optional scheme, a sound absorbing structural member such as soundproofing cotton may be disposed in the sound guide channel A1. Arranging soundproofing cotton in the sound guide channel A1 can increase acoustic resistance of the sound guide channel A1, so as to reduce a resonance peak of the sound guide channel A1, so that the microphone <NUM> has a relatively flat response curve, and finally suppression of the resonance peak can be achieved, thereby enhancing a sound collection effect. In addition, the sound film <NUM> can ensure compliance of vibration.

The terminal device disclosed in some embodiments of the present disclosure may be a terminal device such as a mobile phone, a tablet computer, an ebook reader, a game console, a wearable device (such as a smart watch). In some embodiments of the present disclosure, a specific type of the terminal device is not limited.

The foregoing embodiments of the present disclosure focus on differences between various embodiments. Different optimization features of the various embodiments can be combined to form a better embodiment as long as they are not contradictory. Considering conciseness of description, details are not described herein.

Claim 1:
A terminal device, comprising a housing (<NUM>), a microphone (<NUM>), a sound guide support (<NUM>), a circuit board (<NUM>), and a vibration assembly, wherein the housing (<NUM>) is provided with a sound collecting hole (<NUM>), the sound guide support (<NUM>) and the circuit board (<NUM>) are disposed in the housing (<NUM>), the sound guide support (<NUM>) and the circuit board (<NUM>) form a first cavity (A), the vibration assembly is disposed between the sound guide support (<NUM>) and the circuit board (<NUM>) and separates the first cavity (A) into a sound guide channel (A1) and a second cavity (A2), and the microphone (<NUM>) and the sound collecting hole (<NUM>) are respectively disposed at both ends of the sound guide channel (A1); characterized in that
the sound guide support (<NUM>) is provided with a sound guide groove (<NUM>), the circuit board (<NUM>) covers a notch of the sound guide groove (<NUM>), the circuit board (<NUM>) and the sound guide groove (<NUM>) are connected to form the first cavity (A); and
the sound guide support (<NUM>) further comprises a mounting groove (<NUM>), the mounting groove (<NUM>) intersects the sound guide groove (<NUM>), the vibration assembly comprises a mounting bracket (<NUM>) and a vibration plate (<NUM>), the mounting bracket (<NUM>) is disposed in the mounting groove (<NUM>), a portion of the mounting bracket (<NUM>) extends into the sound guide groove (<NUM>) through the opening part of the sound guide groove (<NUM>), the portion of the mounting bracket (<NUM>) extending into the sound guide groove (<NUM>) is provided with a mounting hole (<NUM>), the mounting hole (<NUM>) communicates with the sound guide groove (<NUM>), the vibration plate (<NUM>) blocks the mounting hole (<NUM>), and the vibration plate (<NUM>), the mounting bracket (<NUM>), and the circuit board (<NUM>) seal the notch of the sound guide groove (<NUM>), and together with the sound guide groove (<NUM>), form the sound guide channel (A1); and the vibration plate (<NUM>), the mounting bracket (<NUM>) and the circuit board (<NUM>) form the second cavity (A2).