Headset

Abstract

An embodiment of the present disclosure provides a head-mounted device. The head-mounted device includes a head-mounted device body, at least one wearing portion connected to the head-mounted device body, and a first sound-emitting unit, the wearing portion including a first sound cavity located at an end of the wearing portion, a second sound cavity located in the middle of the wearing portion, and a sound transmission channel connecting the first sound cavity and the second sound cavity, the first sound-emitting unit can be arranged in the first sound cavity, and when the first sound-emitting unit is arranged in the first sound cavity, the sound output portion of the first sound-emitting unit faces the sound transmission channel, and the second sound cavity is provided with a first sound output hole.

Description

Technical Field

[0001] The present disclosure relates to the fields of head-mounted devices and voice systems, and in particular, to a head-mounted device. Background Art

[0002] With the development of near-eye display technology and wearable devices, wearable electronics are gradually entering the consumer market. Among them, smart glasses or Bluetooth audio glasses, such as AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), and XR (Extended Reality), have attracted attention from different customer groups, bringing great convenience to people's lives and enriching people's interactive experience between virtual and real life. Extended reality includes various forms such as augmented reality (AR), virtual reality (VR), and mixed reality (MR). In other words, XR is actually an umbrella term that includes AR, VR, and MR. XR is divided into multiple levels, ranging from virtual worlds with limited sensor input to fully immersive virtual worlds. Summary of the Invention

[0003] According to one aspect of the present disclosure, there is provided:

[0004] A head-mounted device, wherein the head-mounted device includes a head-mounted device body, at least one wearing part connected to the head-mounted device body, and a first sound-emitting unit, the wearing part includes a first sound cavity located at the end of the wearing part, a second sound cavity located in the middle of the wearing part, and a sound transmission channel connecting the first sound cavity and the second sound cavity, the first sound-emitting unit can be arranged in the first sound cavity, when the first sound unit is arranged in the first sound cavity, the sound output part of the first sound unit faces the sound transmission channel, and the second sound cavity is provided with a first sound output hole.

[0005] Optionally, according to one embodiment of the present disclosure, the first sound-emitting unit is connected to the head-mounted device via a data transmission line, or the first sound-emitting unit is wirelessly connected to the head-mounted device, the first sound-emitting unit is detachably arranged in the first sound cavity and can be removed from the first sound cavity, and the first sound-emitting unit is configured to be in-ear.

[0006] Optionally, according to an embodiment of the present disclosure, the head-mounted device further includes a detection device for detecting whether the first sound-emitting unit is located in the first sound cavity or has been removed from the first sound cavity, and the detection device includes a photoelectric sensor or an ultrasonic sensor.

[0007] Optionally, according to an embodiment of the present disclosure, the wearing portion includes an auricle contact portion, which is used to contact the user's auricle when the user wears the head-mounted device, and the first sound outlet is opened in the auricle contact portion.

[0008] Optionally, according to one embodiment of the present disclosure, the wearable part also includes a third sound cavity, which is located in the middle of the wearable part and is closer to the head-mounted device body than the second sound cavity. A second sound unit is arranged in the third sound cavity, and a second sound outlet is opened in the third sound cavity. The second sound unit is connected to the second sound outlet, and the second sound outlet is connected to the external environment.

[0009] Optionally, according to one embodiment of the present disclosure, the volume of the first sound unit is smaller than the volume of the second sound unit, and the sound power of the first sound unit for high-frequency signals is greater than the sound power of the second sound unit for high-frequency signals, and the sound power of the second sound unit for low-frequency signals is greater than the sound power of the first sound unit for low-frequency signals.

[0010] Optionally, according to an embodiment of the present disclosure, the first sound-emitting unit is configured as a moving iron sound-emitting unit, a piezoelectric sound-emitting unit or an electrostatic sound-emitting unit, and the second sound-emitting unit is configured as a moving coil sound-emitting unit.

[0011] Optionally, according to one embodiment of the present disclosure, the head-mounted device has a first sound mode and a second sound mode. In the first sound mode, the first sound unit is arranged in the first sound cavity and makes sound together with the second sound unit. In the second sound mode, the first sound unit is not arranged in the first sound cavity, the first sound unit makes sound and the second sound unit does not make sound.

[0012] Optionally, according to one embodiment of the present disclosure, the head-mounted device further includes a central processor, an audio digital signal processor, and multiple audio power amplifiers connected to each other in sequence, and the first sound unit and the second sound unit are independently connected to the audio power amplifiers respectively.

[0013] Optionally, according to an embodiment of the present disclosure, in the first sounding mode, the audio signal can be processed by the audio digital signal processor and divided into a mid-low frequency signal and a high frequency signal, wherein the second sounding unit receives the mid-low frequency signal for sounding, and the first sounding unit receives the high frequency signal for sounding; or, the audio signal can be processed by the audio digital signal processor without being divided into a mid-low frequency signal and a high frequency signal, and the first sounding unit and the second sounding unit jointly receive the audio signal for sounding,

[0014] In the second sound emitting mode, the first sound emitting unit receives an audio signal and emits sound.

[0015] Optionally, according to an embodiment of the present disclosure, the head-mounted device is smart glasses, and the smart glasses include a frame as the head-mounted device body and at least one temple connected to the frame as the at least one wearing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features of the present disclosure will become apparent with reference to the accompanying drawings, in which:

[0017] Figure 1 A schematic structural diagram of a head mounted device according to an embodiment of the present disclosure is shown;

[0018] Figure 2 A schematic diagram of wearing a head-mounted device in a speaker mode according to an embodiment of the present disclosure is shown;

[0019] Figure 3 A schematic diagram of wearing a head-mounted device in a privacy mode according to an embodiment of the present disclosure is shown;

[0020] Figure 4 A cross-sectional view of a temple according to an embodiment of the present disclosure is shown;

[0021] Figure 5 A cross-sectional view of a first sound unit installed on a head-mounted device body according to an embodiment of the present disclosure is shown;

[0022] Figure 6 shows a structural exploded view of a first sound unit according to an embodiment of the present disclosure;

[0023] Figure 7 The figure shows an audio transmission link of a head mounted device in an external speaker mode according to an embodiment of the present disclosure;

[0024] Figure 8 An audio transmission link of a head mounted device in a privacy mode according to an embodiment of the present disclosure is shown; and

[0025] Figure 9 An acoustic curve of a head-mounted device according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0026] It is easy to understand that according to the technical solution of the present disclosure, without changing the essential spirit of the present disclosure, a person skilled in the art can propose a variety of interchangeable structural methods and implementation methods. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present disclosure and should not be regarded as the entire disclosure or as a limitation or restriction of the technical solution of the present disclosure.

[0027] The terms "up," "down," "left," "right," "front," "back," "front," "back," "top," and "bottom" mentioned or potentially mentioned in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may vary depending on their location or usage. Therefore, these or other directional terms should not be interpreted as restrictive. In addition, the terms "first," "second," "third," and similar expressions are used only for descriptive and distinguishing purposes and should not be understood to indicate or imply the relative importance of the corresponding components.

[0028] Currently, the coupling methods between the sound-generating unit of a headset and the wearer's ear canal can be categorized as in-ear and open-ear. In-ear means the sound-generating unit directly contacts the user's external auditory canal, allowing the sound produced to enter the inner ear directly from the external auditory canal, stimulating the user's auditory nerve and thus producing hearing. Open-ear means the sound-generating unit is not in direct contact with the external auditory canal, but rather exists at a distance. The sound produced by the sound-generating unit is both received by the wearer's ear canal and radiated into the surrounding environment, causing sound leakage. In-ear headsets offer greater acoustic privacy, but prolonged wear can compress the auricle, causing discomfort. Furthermore, the in-ear structure blocks external sound from entering the wearer's ear canal, preventing the wearer from perceiving changes in the external environment, posing certain safety concerns. Open-ear headsets are easier and more comfortable to wear than in-ear headsets, and prolonged wear does not cause ear discomfort. While the wearer receives sound from the headset, they can also perceive sounds from the external environment, making them safer to use. However, open-ear coupling also has significant drawbacks: significant sound leakage, which compromises personal privacy.

[0029] refer to Figures 1 to 5 , respectively showing a structural schematic diagram of a head-mounted device according to an embodiment of the present disclosure, a wearing schematic diagram of the head-mounted device in an external speaker mode, a wearing schematic diagram of the head-mounted device in a privacy mode, a cross-sectional view of a temple according to an embodiment of the present disclosure, and a cross-sectional view of a first sound unit when installed in the head-mounted device body according to an embodiment of the present disclosure.

[0030] The head-mounted device includes a head-mounted device body 11, at least one wearing part connected to the head-mounted device body 11, and a first sound unit 12. The wearing part includes a first sound cavity 1125 located at the end of the wearing part, a second sound cavity 1126 located in the middle of the wearing part, and a sound transmission channel 1127 connecting the first sound cavity and the second sound cavity. The first sound unit can be arranged in the first sound cavity. When the first sound unit is arranged in the first sound cavity, the sound output part 1211 of the first sound unit faces the sound transmission channel, and the second sound cavity is provided with a first sound output hole 111.

[0031] It goes without saying that the head-mounted device should be understood in a broad sense, generally referring to a device that can be worn / worn by the user's head and can support the function of audio playback. Therefore, the wearable part is the part used for wearing, and the head-mounted device body is the remaining part, for example, the remaining part excluding the first sound unit and the wearable part. For example, in the case where the head-mounted device is smart glasses, the head-mounted device body refers to the frame, or a combination of parts such as the frame and the lens. The head-mounted device 1 may include glasses or a helmet. Glasses may include smart glasses such as AR glasses, VR glasses, or Bluetooth audio glasses, etc. Similarly, helmets may also include smart helmets such as AR helmets. In this article and the accompanying drawings, smart glasses are used as an example for description, and thus, the smart glasses include a frame 113 as the head-mounted device body 11 and at least one temple connected to the frame as the at least one wearable part.

[0032] However, it should be clear to those skilled in the art that the various technical solutions disclosed herein can be applied to all types of head-mounted devices, including the above examples. In this article, the frame refers to the front part of the glasses, that is, the part that accommodates the lenses, and the temples refer to the part that can pivot relative to the frame. Of course, according to the different design forms of the glasses, the structure and positional relationship of the frame and the temples can also be changed. In the present technical solution, in the stored state (external mode), the first sound unit is arranged at the end of the temple (those skilled in the art should know that the end is the back side of the temple, that is, the end on the side away from the frame in the legend), so that the installation of the first sound unit can utilize the existing space of the temple, including the data cable can also be stored in the temple, and the design of the first sound unit will not affect the original structural design of the temple, so the first sound unit disclosed in the present invention can be applied to various glasses.

[0033] The technical solution described herein indicates that when the first sound-emitting unit is positioned within the first sound cavity, the sound it emits can be transmitted via the sound-emitting portion, the sound transmission channel, and the second sound cavity to the first sound-emitting hole, with the first sound-emitting hole providing the final sound. However, when the first sound-emitting unit is not positioned within the first sound cavity, the sound can be emitted by the sound-emitting portion of the first sound-emitting unit itself. This technical solution thus provides the entire head-mounted device with multiple sound-emitting possibilities, allowing users to adopt different sound-emitting methods as needed for different applications or conditions, thereby improving the compatibility and flexibility of the head-mounted device. Furthermore, in the illustrations, the first sound cavity is formed by a cavity constructed within the right end of the wearable portion, and positional terms such as end or middle in the text do not strictly require that the corresponding component be located precisely at the end or middle, but rather that the corresponding positional requirements are generally met. The term "sound-emitting unit" herein refers generally to any device capable of emitting sound, without specific limitation. In some embodiments, the first sound-emitting hole communicates with the external environment so that the sound it receives can be transmitted to the outside world.

[0034] In some embodiments of the present disclosure, the first sound unit is connected to the head-mounted device via a data transmission line (eg Figure 1 As shown), or, the first sound-emitting unit is wirelessly connected to the head-mounted device, the first sound-emitting unit is detachably arranged in the first sound cavity and can be removed from the first sound cavity, and the first sound-emitting unit is configured to be in-ear.

[0035] According to the above technical solution, it should be understood that the first sound-emitting unit can be called a detachable sound-emitting unit. Detachable means that the sound-emitting unit can be installed on the wearable part or removed from the wearable part (in this case, the two are still connected via a data cable or wirelessly). According to the above technical solution, when the first sound-emitting unit is arranged on the wearable part, the first sound-emitting unit can transmit the emitted sound to the first sound outlet, and the first sound outlet then transmits the sound, for example, to the external environment, thereby achieving the effect of the external speaker mode ( Figure 2 ); When the first sound unit is removed from the wearing part, the sound is emitted directly from the first sound unit. Since the first sound unit is configured to be in-ear, the user can put the first sound unit into the ear while wearing the head-mounted device (just like wearing in-ear headphones), thereby achieving the effect of privacy mode ( Figure 3 ). Therefore, this technical solution realizes two sound emission modes of the head-mounted device, namely privacy mode (or private mode) and external speaker mode.

[0036] In addition, since the first sound unit is installed at the end of the temple, that is, installed at the end of the entire pair of glasses, the user can easily remove the first sound unit and put it in the ear when needed, and vice versa, the first sound unit can be easily installed back to the end of the temple. After becoming proficient in operation, the user does not even need to look at the head-mounted device to switch between privacy mode and external speaker mode. Although not explicitly described in this disclosure, other layout designs of the first sound unit are also applicable, and flexible designs can be made according to the specific installation space provided by the head-mounted device.

[0037] Here, those skilled in the art should know that the data cable between the first sound unit and the head-mounted device should have a certain length to support the user to remove the first sound unit and plug it into the ear when wearing the head-mounted device, and the data transmission line can be guided in the temple. Here, optionally, a hub and a wire pulling device are provided in the temple to help maintain the shape of the wire and prevent it from getting tangled when the user puts the first sound unit back into the wearing part, so that the wire is regular. The hub can be realized by providing a groove in the temple.

[0038] As mentioned above, the head-mounted device can conveniently support users to switch between privacy mode (or private mode) and external speaker mode as needed. For example, when the user is in a more private environment or does not require high privacy, the external speaker mode is selected. At this time, the coupling method between the first sound unit and the user's ear canal is open, which improves wearing comfort. In a noisy environment or when privacy protection is required, the privacy mode is selected to avoid sound leakage to the external environment, thereby improving the privacy of voice interaction and information security between the user and the head-mounted device. The coupling method between the first sound unit and the user's ear canal is in-ear. Therefore, the present disclosure provides a variety of functionality of the head-mounted device and flexible adaptability to environmental adaptation.

[0039] The user can switch between these two modes and control the power switch based on the control design of the head-mounted device itself. For example, the switching can be controlled by a mobile phone connected to the head-mounted device, or by the head-mounted device's own operating system or hardware, or by automatic control through sensors set on the head-mounted device. It should also be understood that for the head-mounted device of the present disclosure, the audio source played can be an audio file stored in its own memory, or it can be an audio file input by an external device (such as a local device such as a mobile phone, tablet computer, laptop computer, desktop computer, etc.) via wired or wireless means.

[0040] In this regard, the head-mounted device may further include a detection device for detecting whether the position of the first sound unit 12 is in the first sound cavity or has been removed from the first sound cavity. Thus, when the detection device detects that the position of the first sound unit is in the first sound cavity, a signal is sent to the head-mounted device to switch to the external speaker mode. When the position of the first sound unit is not detected to be in the first sound cavity, the head-mounted device enters the privacy mode. It is also feasible that a sensor device is designed on the first sound unit to detect whether the sound unit is plugged into the user's ear. If so, the head-mounted device enters the privacy mode. If not, and the position of the first sound unit is not detected to be in the first sound cavity at this time, the head-mounted device is put into standby or off state.

[0041] Specifically, the detection device may include a photoelectric sensor or an ultrasonic sensor. It should be understood that the photoelectric sensor and the ultrasonic sensor can be used to detect whether there is an obstacle within their range, so this characteristic can be applied to the position detection of the first sound unit and the judgment of the above-mentioned relationship. For example, the photoelectric sensor can be set on the inner wall of the end of the temple where the first sound cavity is located, which includes a transmitter and a receiver for receiving the transmitter signal. When the first sound unit is arranged in the first sound cavity, the first sound unit blocks the transmitter and the receiver, and the speaker mode can be entered; when the first sound unit is removed from the first sound cavity, the light signal emitted by the transmitter is received by the receiver, and the privacy mode can be entered. Therefore, the position of the first sound unit can be judged according to the signal reception of the receiver and the subsequent mode determination work can be performed. The specific setting of the ultrasonic sensor can also be interpreted similarly.

[0042] Among them, photoelectric sensors have the following characteristics: long detection distance, few restrictions on the objects to be detected, short response time, high resolution, non-contact detection, color discrimination, and easy adjustment; ultrasonic sensors have the following characteristics: high frequency, short wavelength, minimal diffraction, good directionality, and the ability to propagate in a directional manner. It should be understood that those skilled in the art can adjust the sensor placement or use other sensor types based on actual needs.

[0043] from Figure 2 and Figure 3 It can also be seen that when the user wears the head-mounted device, the auricle of his ear needs to support the head-mounted device. In this regard, the wearing portion (such as the temple 112) of the present disclosure may include an auricle contact portion 1121 for contacting the user's auricle when the user wears the head-mounted device 1, and the first sound outlet 111 is opened at the auricle contact portion 1121. It can be seen that by opening the first sound outlet at the auricle contact portion, the sound emitted by the first sound outlet can be transmitted to the user's ear at a relatively close distance, thereby ensuring the clarity, fidelity and other qualities of the sound while maintaining the external speaker mode, and also achieving a certain energy-saving effect, avoiding the excessive impact of the volume on the external environment. Those skilled in the art should know that although the first sound outlet is opened at the auricle contact portion, the opening of the first sound outlet should avoid direct contact with the user's auricle during use, so as to avoid the first sound outlet being blocked by the user's auricle.

[0044] It is feasible that the auricle contact portion is configured as an inclined surface, thereby dividing the temple into a multi-segment structure in terms of shape. The inclined surface structure can better fit the user's auricle, improve wearing comfort, and also facilitate the opening of a sound hole thereon. The auricle contact portion can also be further configured to match the shape of the portion that contacts the user's auricle. In addition, considering that users may have different head shapes, glasses or temples of various specifications can be designed, or telescopic parts can be added to the temples to suit users of various head shapes. In this way, the auricle contact portion can be placed against the user's auricle when worn, so that the sound hole can achieve the above-mentioned technical effects.

[0045] Figure 4 The main purpose is to show the structure and layout of the sound unit inside the temple, as well as the corresponding sound holes. As can be seen from the figure, the wearable part also includes a third sound cavity 1128, which is located in the middle of the wearable part (such as the temple) and is closer to the head-mounted device body (such as the frame) than the second sound cavity. A second sound unit 114 is provided in the third sound cavity, and a second sound hole is opened in the third sound cavity 1128. The second sound unit 114 is connected to the second sound hole 1122, and the second sound hole 1122 is connected to the external environment. In addition, Figure 1 The dotted rectangular frame schematically marks the second sound emitting unit 114.

[0046] In this example, the second sound-emitting unit is constructed in the shape of a cuboid, which enables it to have a simple structure, low manufacturing cost, and be easy to install and disassemble while maintaining the required sound performance. Correspondingly, the shape of the second sound hole can also be designed to be rectangular to match the second sound-emitting unit. However, it should be understood that the various sound holes mentioned herein can be constructed into the required shape according to actual needs, such as using holes of various shapes such as rectangles, squares, circles, and ellipses. Similarly, the various sound-emitting units mentioned herein can also adopt shapes other than cuboids, such as cylinders, spheres, ellipsoids, cones, or irregular shapes, according to actual needs. In addition, the exemplary structure of the first sound-emitting unit will be described below.

[0047] It can be seen from the above technical solution that in addition to the first sound-emitting unit, the head-mounted device also adopts a fixed second sound-emitting unit in the temple, so as to provide the user with more sound-emitting possibilities in the external speaker mode, such as the possibility of multi-channel, multi-band and more three-dimensional surround sound effects. In addition, the technical solution also defines the position of the second sound hole, that is, it is located between the frame and the first sound hole. In addition, the second sound hole is opened on the plane to the left of the auricle contact part of the temple. The purpose of this design method is to be able to be relatively close to the user's auricle when in use to achieve similar technical effects, and it can also be superimposed or supplemented with the first sound hole to achieve multi-dimensional sound effects (such as frequency division propagation of sound). Thus, the second sound hole can be arranged adjacent to the first sound hole.

[0048] It should be understood that the second sound hole and the second sound unit can be the sound hole and sound unit originally present in the head-mounted device, or can be an additional sound hole and sound unit added (for example, for the purpose of sound quality). It is also feasible to arrange the second sound hole to be further away from the frame relative to the first sound hole, but still adjacent to the first sound hole. The specific design position can depend on the actual structure of the temples and the user's head shape. The number, shape, layout position and other features of the sound unit and the corresponding sound hole can also be modified according to actual needs and the actual structural shape of the head-mounted device.

[0049] It can be seen that the head-mounted device 1 can have a first sound emission mode (e.g., an external speaker mode) and a second sound emission mode (e.g., a privacy mode). In the first sound emission mode, the first sound emission unit is arranged in the first sound cavity and emits sound together with the second sound emission unit. In the second sound emission mode, the first sound emission unit is not arranged in the first sound cavity, the first sound emission unit emits sound, and the second sound emission unit does not emit sound. For example, when a user is in a more private environment or has low privacy requirements, the first sound emission mode is selected. At this time, the coupling method between the first sound emission unit and the user's ear canal is open; the second sound emission mode is selected in a noisy environment or when privacy protection is required.

[0050] refer to Figure 6 , shows a structural decomposition diagram of a first sound unit according to an embodiment of the present disclosure.

[0051] As can be seen from the figure, the first sound-emitting unit 12 includes an earplug 121, a front shell 122, a rear shell 123, a sound system 124 and a data transmission line 125 (the data transmission line can also be an accessory independent of the sound-emitting unit). Among them, the front and back of the front shell and the rear shell are determined according to the direction when the first sound-emitting unit is installed on the wearable part. In this state, facing the frame is the front, and facing away from the frame is the back. In addition, an earplug sound outlet hole (a type of sound outlet part 1211) is provided on the earplug to radiate the sound generated by the sound system to the outside world. The data transmission line is used for data transmission with the head-mounted device. When the first sound-emitting unit is removed from the wearable part, the data transmission line is in an unfolded state. When the first sound-emitting unit is fixed to the wearable part, the data transmission line is collected inside the wearable part by the hub inside the temple.

[0052] In this regard, those skilled in the art will appreciate that the shape of the earplug can be matched to the contours of the user's ear canal to provide a comfortable wearing experience, particularly one that minimizes the sensation of a foreign body when worn for extended periods. For example, the present disclosure utilizes earplugs with a curved outer periphery and a circular sound outlet on the front side of the earplug. The front shell is used to fit the earplugs, and therefore utilizes a cylindrical structure with two different sizes. The small cylindrical portion at the front end of the front shell is used to fit the earplugs, supporting and stretching the earplugs. One end of the large cylindrical portion of the front shell is connected to the small cylindrical portion, and the other end is connected to the sound system, which is shown as a flat disc. The rear shell houses the sound system and a portion of the large cylindrical portion, providing external protection for the entire first sound unit. A data transmission line is connected to the end of the rear shell. Thus, the first sound unit can be inserted into the temple using its earplug up to a portion of the front shell, sealing it from the external environment. The rear shell is exposed to the external environment to provide protection and prevent the entire sound unit from sliding into the temple. To this end, the rear shell is configured to be larger than the temples, and a stopper 1123 may be designed inside the temples to support the earplug of the sound unit. Those skilled in the art will also appreciate that the first sound unit can be assembled on the wearable portion in other ways based on actual needs or requirements. Since the structure of the sound unit is not the focus of this disclosure, it will not be described in detail.

[0053] from Figure 5It can also be seen that a partition portion 1124 is provided between the spaces of the temples where the first sound outlet hole and the second sound outlet hole are respectively located. The partition portion is used to prevent the sound propagating from the first sound emitting unit to the first sound outlet hole and the sound propagating from the second sound emitting unit to the second sound outlet hole from interfering with each other inside the temple. The partition portion can simply adopt a thin plate-like structure to achieve this purpose without causing any influence on the overall structure or physical properties of the temple. Of course, it can also be known that, taking into account the actual application conditions and the structure of the temples, for example, in some models of glasses, there will be connecting wires such as FPC at the end and front end of the temples. Therefore, those skilled in the art can cancel the design of the partition portion according to the actual application conditions or open openings in the partition portion for the connection wires and other components to pass through, so as to adapt to different models of head-mounted devices. Similarly, since the structure of the glasses is not the focus of this disclosure, it will not be elaborated on.

[0054] Regarding the specific forms of various sound-emitting units, in some embodiments of the present disclosure, the first sound-emitting unit 12 can be configured as a dynamic coil sound-emitting unit, a moving iron sound-emitting unit, a piezoelectric sound-emitting unit, or an electrostatic sound-emitting unit. The second sound-emitting unit can also be designed similarly. Among them, dynamic coil sound-emitting units have excellent low-frequency performance and are low-priced; moving iron sound-emitting units have excellent high-frequency performance, low power consumption, and a small size; piezoelectric sound-emitting units can be used as tweeters and are thinner; and electrostatic sound-emitting units have excellent performance and low distortion. Considering the cost, performance, and size of current sound-emitting devices, dynamic coil sound-emitting units can be selected.

[0055] In addition to the above selection references, it is also feasible to consider that the first sound unit is used in privacy mode. Since privacy mode is an in-ear wearing method, the sound will be concentrated in the ear canal at this time and will not be dispersed in all directions like in the open scenario. Therefore, in privacy mode, the low-frequency performance of the first sound unit will be greatly improved compared to the external speaker mode, which can meet the wearer's hearing needs. Based on this consideration, combined with the characteristics of the above-mentioned various types of sound units, it is also feasible to use a sound unit type with better high-frequency performance for the first sound unit. That is, the first sound unit 12 can be configured as a moving iron sound unit, a piezoelectric sound unit, or an electrostatic sound unit. In this case, when in external speaker mode, due to the lack of the above-mentioned low-frequency performance compensation, the second sound unit should use a sound unit type with better low-frequency performance. That is, the second sound unit 114 can be configured as a dynamic coil sound unit. Therefore, with this combination of sound unit types, the requirements of privacy mode and external speaker mode can be met simultaneously across the full frequency range. This design method is a frequency division design method.

[0056] The type of sound unit corresponding to the frequency can also be selected based on the relationship between the sound frequency and size of the sound unit. It should be known that the sound power w radiated by the direct radiation dynamic sound unit to the half space isa , which can be expressed as follows:

[0057] When ka<1, we have:

[0058]

[0059] When ka>5, we have:

[0060]

[0061] Where k is the wave number, a is the characteristic size of the dynamic sound unit, ρ0 is the air density, c0 is the speed of sound, e g is the driving voltage, Bl is the electromechanical coupling coefficient, R eg is the resistance of the voice coil, S d is the effective radiation area, M s is the effective vibrating mass, and w is the angular frequency.

[0062] It can be seen that in the low frequency band with smaller wave number, the sound power w a and effective radiation area S d The square of the sound power w is proportional to the power of the low-frequency sound unit (such as the second sound unit). a and effective vibrating mass M s The square of the power is inversely proportional to the power of the first sounding unit, so a light-weight device can be used for a high-frequency sounding unit (such as the first sounding unit). In general, a small-sized, light-weight tweeter device can be used for the first sounding unit, and a large-sized woofer device can be used for the second sounding unit. Therefore, in some embodiments, the volume of the first sounding unit is smaller than that of the second sounding unit, and the sound power of the first sounding unit for high-frequency signals is greater than that of the second sounding unit for high-frequency signals, and the sound power of the second sounding unit for low-frequency signals is greater than that of the first sounding unit for low-frequency signals.

[0063] refer to Figure 7 and Figure 8 , respectively showing the audio transmission link of a head-mounted device in an external speaker mode and an audio transmission link in a privacy mode according to an embodiment of the present disclosure.

[0064] It should be understood that since the specific shapes and connection methods of each component are not the focus of this disclosure, for the sake of clarity and simplicity, all of these components are schematically illustrated in the form of structural modules. Those skilled in the art can, with the guidance of the link diagram, select appropriate module shapes and connection methods. Furthermore, the provided link diagram is only one embodiment of this disclosure. Those skilled in the art may, after referring to the link diagram, make various modifications that do not depart from the spirit of this disclosure, and such modifications should also be within the scope of protection of this disclosure.

[0065] The head mounted device 1 may include a central processing unit 115, an audio digital signal processor 116, and an audio power amplifier 117 which are sequentially connected to each other, and the first sound emitting unit and the second sound emitting unit are independently connected to the audio power amplifier.

[0066] It should be understood that the central processing unit (CPU), as the core of computing and control, is responsible for information processing, signal transmission and reception, and the operation of the operating system and applications. It can be a built-in component of the headset or an optional component. The audio digital signal processor (DSP) processes digitized audio signals, such as through tunable algorithms to meet application requirements such as sound quality improvement, matrix mixing, noise cancellation, echo cancellation, and feedback cancellation, including the frequency division processing described above. If necessary, a digital-to-analog converter (DAC) can be provided downstream of the DSP to output single- or multi-channel analog signals. The audio power amplifier (AMP) amplifies the audio power to reconstruct the input audio signal, specifically ensuring that the reconstructed signal volume and power level are ideal—true, efficient, and low-distortion. In this example, two first sound units and two second sound units are provided, along with four audio power amplifiers, each assigned to a sound unit, to provide more targeted signal processing for each sound unit. Of course, for reasons of production cost or space, it is also possible to provide only one audio power amplifier for all sound units. It should also be noted that in some embodiments of the present disclosure, a separate circuit board is provided on each of the left and right temples, a central processing unit is located on one of the circuit boards, and power amplifiers are provided on both circuit boards. Although not described in detail in the present disclosure, it is also possible to provide the central processing unit, audio digital signal processor, and audio power amplifier on the same circuit board, and to arrange the circuit board inside the headset body.

[0067] In the case of the application of the frequency division processing as described above, in the first sounding mode (such as the external speaker mode), the audio digital signal processor divides the audio signal into a high-frequency signal and a medium-low frequency signal, wherein the high-frequency signal is Figure 7 The mid- and low-frequency signals are transmitted to the power amplifier and the first sound unit above the Figure 7The audio signal is transmitted to the power amplifier and the second sound unit below. As a result, the first sound unit and the second sound unit are used in conjunction with each other, and each sound unit can perform its function and output the sound for its own frequency band. In the application mode of non-frequency division processing, when the audio signal passes through the audio digital signal processor, the audio digital signal processor no longer performs frequency division processing, that is, the audio signal can be processed by the audio digital signal processor without being divided into medium and low frequency signals and high frequency signals. The first sound unit and the second sound unit jointly receive the audio signal (such as low, medium and high frequency signals) for sound. In the case of this application mode, the four sound units can achieve better spatial audio effects.

[0068] In the second sound mode (such as privacy mode), the first sound unit receives the audio signal and makes a sound. It should be noted that even if the first sound unit uses a sound unit with better high-frequency performance, its low-frequency performance is still good in this mode. Figure 9 , showing the acoustic curves of a head-mounted device according to an embodiment of the present disclosure. The solid line represents the acoustic curve of the first sound unit in privacy mode, and the dashed line represents the acoustic curve of the first sound unit in speaker mode. As can be seen, the low-frequency performance in privacy mode is significantly improved, and even using the first sound unit alone can still meet the full-band listening requirements.

[0069] As can be seen, the present disclosure solves the problem of large sound leakage from head-mounted devices, protects the user's privacy, and can also meet the application needs of external speakers. When the wearer is in a more private environment or does not require high voice privacy, the external speaker mode can be selected first to improve wearing comfort and not hinder the wearer's perception of sounds in the external environment, thereby improving safety. When the wearer needs to make private voice calls, the privacy mode can be selected to prevent sound leakage to the external environment, thereby improving the privacy of voice interactions between the user and the head-mounted device.

[0070] It should be understood that all the above preferred embodiments are illustrative rather than restrictive, and that various modifications or variations made by those skilled in the art to the above-described specific embodiments under the concept of the present disclosure should be within the legal protection scope of the present disclosure.

Claims

1. A head-mounted device, characterized in that: The head-mounted device includes a head-mounted device body, at least one wearing part connected to the head-mounted device body, and a first sound-emitting unit, the wearing part includes a first sound cavity located at the end of the wearing part, a second sound cavity located in the middle of the wearing part, and a sound transmission channel connecting the first sound cavity and the second sound cavity, the first sound-emitting unit is detachably arranged in the first sound cavity, when the first sound-emitting unit is arranged in the first sound cavity, the sound output part of the first sound-emitting unit faces the sound transmission channel, the second sound cavity is provided with a first sound output hole, the sound emitted by the first sound-emitting unit is transmitted to the first sound output hole via the sound output part, the sound transmission channel, and the second sound cavity, the first sound-emitting unit can be removed from the first sound cavity, and the first sound unit is configured to be in-ear.

2. The head-mounted device according to claim 1, wherein: The first sound emitting unit is connected to the head mounted device via a data transmission line, or the first sound emitting unit is connected to the head mounted device wirelessly.

3. The head-mounted device according to claim 2, wherein: The head-mounted device further includes a detection device for detecting whether the first sound-emitting unit is located in the first sound cavity or has been removed from the first sound cavity, and the detection device includes a photoelectric sensor or an ultrasonic sensor.

4. The head-mounted device according to claim 1, wherein: The wearing portion includes an auricle contact portion, which is used to contact the user's auricle when the user wears the head-mounted device, and the first sound outlet is opened in the auricle contact portion.

5. The head-mounted device according to claim 1, wherein: The wearable portion also includes a third sound cavity, which is located in the middle of the wearable portion and is closer to the head-mounted device body than the second sound cavity. A second sound-emitting unit is arranged in the third sound cavity, and a second sound outlet is opened in the third sound cavity. The second sound-emitting unit is connected to the second sound outlet, and the second sound outlet is connected to the external environment.

6. The head-mounted device according to claim 5, wherein: The volume of the first sound unit is smaller than that of the second sound unit, and the sound power of the first sound unit for high-frequency signals is greater than the sound power of the second sound unit for high-frequency signals, and the sound power of the second sound unit for low-frequency signals is greater than the sound power of the first sound unit for low-frequency signals.

7. The head-mounted device according to claim 5, wherein: The first sound-emitting unit is configured as a moving iron sound-emitting unit, a piezoelectric sound-emitting unit, or an electrostatic sound-emitting unit, and the second sound-emitting unit is configured as a moving coil sound-emitting unit.

8. The head-mounted device according to claim 5, wherein: The head-mounted device has a first sound emission mode and a second sound emission mode. In the first sound emission mode, the first sound emission unit is arranged in the first sound cavity and emits sound together with the second sound emission unit. In the second sound emission mode, the first sound emission unit is not arranged in the first sound cavity, the first sound emission unit emits sound and the second sound emission unit does not emit sound.

9. The head-mounted device according to claim 8, wherein: The head-mounted device also includes a central processing unit, an audio digital signal processor, and multiple audio power amplifiers that are connected to each other in sequence, and the first sound unit and the second sound unit are independently connected to the audio power amplifiers.

10. The head-mounted device according to claim 9, wherein: In the first sounding mode, the audio signal can be processed by the audio digital signal processor and divided into a medium-low frequency signal and a high-frequency signal, wherein the second sounding unit receives the medium-low frequency signal for sounding, and the first sounding unit receives the high-frequency signal for sounding; or the audio signal can be processed by the audio digital signal processor without being divided into a medium-low frequency signal and a high-frequency signal, and the first sounding unit and the second sounding unit jointly receive the audio signal for sounding, In the second sound emitting mode, the first sound emitting unit receives an audio signal and emits sound.

11. The head-mounted device according to claim 1, wherein: The head-mounted device is a smart glasses, which includes a frame as the head-mounted device body and at least one temple connected to the frame as the at least one wearing part.

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