Glasses-type user terminal

Abstract

We provide a glasses-type user terminal equipped with a sound-collecting structure. [Solution] The glasses-type user terminal 1 includes a nose portion 12 positioned on the lower center of the frame 10, a sound-collecting opening formed on the lower or front lower surface of the nose portion and inclined to face the user's mouth when worn, an acoustic guidance passage formed inside the nose portion and communicating with the sound-collecting opening, and a microphone module positioned inside the nose portion corresponding to the exit of the acoustic guidance passage. Guide lips protruding outward from the frame are provided around the periphery of the sound-collecting opening, and a hood partially covering the sound-collecting opening is provided on the front side of the sound-collecting opening. The acoustic guidance passage includes a bent section that bends at least once to attenuate the straight-line component of the airflow. This enables high-sensitivity sound collection near the mouth, suppression of wind noise and turbulence, and improved microphone reliability.

Description

Technical Field

[0001] The present invention relates to a glasses-type user terminal having a sound collection structure.

Background Art

[0002] In recent years, with the development of augmented reality (AR) technology, the popularity of glasses-type wearable devices has been increasing, and the importance of speech recognition technology as an interface for controlling them has been growing. However, due to the characteristics of being worn during outdoor movement, glasses-type user terminals are subject to environmental constraints such that they are easily exposed to strong wind noise and ambient noise.

[0003] In conventional glasses-type terminals, a microphone is mainly arranged on the temple (the arm part) or the side surface of the frame. However, the distance from the sound source (the user's mouth) is large, the signal-to-noise ratio (SNR) is likely to decrease, and it is disadvantageous from the viewpoint of sound collection directivity.

[0004] On the other hand, when a microphone is arranged on the nose part (bridge / nose pads) close to the sound source, foreign substances such as sweat, condensed water due to exhalation, and dust generated during wearing may enter, which may cause damage to the microphone module or deterioration of acoustic performance, and reliability problems may occur.

[0005] Therefore, there is a need for a structural sound collection design that can protect the microphone from external airflows and pollution sources while achieving high-quality sound collection near the mouth.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been made in view of the above problems of the prior art, and aims to solve the following problems. (1) To provide a highly sensitive sound collection structure near the mouth by arranging a sound collection opening on the nose part of the frame to minimize the distance from the sound source. (2) The protruding shape around the sound collection opening and the bending structure of the internal duct are designed to physically block or attenuate the intrusion of wind noise and turbulence caused by external airflow. (3) The microphone module shall be equipped with a multilayer filter structure, drainage pockets and drainage holes to effectively discharge internal condensation and moisture that has entered from the outside, thereby ensuring the electrical and physical reliability of the microphone module. (4) To realize an elastic support structure that suppresses the transmission of mechanical vibrations and friction noise caused by the frame to the microphone. [Means for solving the problem]

[0007] To solve the above problems, a glasses-type user terminal according to one embodiment of the present invention comprises a nose portion positioned on the lower center of the frame, a sound-collecting opening formed on the lower or front lower surface of the nose portion and inclined to face the user's mouth when worn, an acoustic guide passage formed inside the nose portion and communicating with the sound-collecting opening, and a microphone module positioned inside the nose portion corresponding to the exit of the acoustic guide passage.

[0008] Furthermore, guide lips are provided that protrude outward from the frame at the periphery of the sound-collecting opening, and a hood is provided that extends forward from the front of the sound-collecting opening to partially cover it. Furthermore, the acoustic induction path is characterized by including a bent section that bends at least once in order to attenuate the straight-line component of the airflow. [Effects of the Invention]

[0009] The present invention can achieve the following effects. (1) Sound can be collected at the shortest distance from the mouth, which is the source of speech, through the inclined opening on the underside of the nose, and a high-quality speech signal with high clarity against background noise can be obtained, which can significantly improve the speech recognition rate. (2) The multi-stage noise reduction mechanism, consisting of a guide lip, hood, and bent duct structure, effectively suppresses wind noise and turbulence generated during movement, providing a stable communication and input environment. (3) The combination of a water-repellent membrane and drainage pockets / drainage holes can prevent the accumulation of internal condensation water and suppress the intrusion of foreign matter, thereby improving durability and operational reliability. (4) The vibration-damping structure, including elastic bushings and sealing gaskets, minimizes the intrusion of friction noise or vibration noise generated during frame operation into the microphone. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view of a glasses-type user terminal according to one embodiment of the present invention. [Figure 2] This is a front view of a glasses-type user terminal according to one embodiment of the present invention. [Modes for carrying out the invention]

[0011] Figure 1 is a perspective view of a glasses-type user terminal (1) according to one embodiment of the present invention, and Figure 2 is a front view.

[0012] Referring to Figure 1, the eyeglass-type user terminal (1) may include a frame (10) positioned on the front of the user's face. The frame (10) includes a pair of left and right rim portions (11L, 11R), to which lens portions (20L, 20R) may be attached. Connecting portions (30L, 30R) are positioned at the left and right ends of the frame (10), and the connecting portions (30L, 30R) may include a hinge structure that rotatably connects the frame (10) to the temple portions (40L, 40R). For example, the hinge structure may include a first hinge element (31L, 31R) and a second hinge element (32L, 32R), and a support portion (42L, 42R) that supports the area around the hinge. The temples (40L, 40R) extend rearward from the frame (10), and a cover / reinforcement portion (41L, 41R) may be formed on a part of the temples (40L, 40R). An ear hook rear end portion (50L, 50R) may be provided at the rear end of the temples (40L, 40R), and a contact portion (60L, 60R) for user contact may be provided on at least a part of the rear end portion (50L, 50R). Furthermore, the rear end portions (50Ls, 50Rs) may be provided as areas on which sensors or functional surfaces (e.g., contact detection, button area, etc.) are arranged.

[0013] Referring to Figures 1 and 2, a nose portion (12) may be positioned on the lower center of the frame (10). The nose portion (12) is formed to protrude below the bridge region, and a characteristic feature of the sound-collecting structure of this invention is that it is concentrated in the nose portion (12). For example, the nose portion (12) has a roughly trapezoidal or rectangular shape with rounded corners when viewed from the front, and is positioned close to the lower side of the user's nostrils and near the philtrum when worn. The external dimensions of the nose portion (12) may vary depending on the embodiment, but as an example, the left-right width (X direction) may be set in the range of 12 to 28 mm, the vertical height (Z direction) in the range of 6 to 14 mm, and the front-to-back thickness (Y direction) in the range of 4 to 10 mm.

[0014] According to the present invention, the sound-collecting structure of the nose portion (12) can be embodied as a combination of (i) a sound-collecting opening, (ii) an airflow blocking shape around the opening, (iii) an internal acoustic induction passage (duct), (iv) a filter / membrane stack, (v) a drainage structure, and (vi) a microphone module support structure.

[0015] (Sound collection opening) The lower or front-lower (forward-downward) surface of the nose portion (12) may be provided with a sound-collecting opening that is inclined to face the user's mouth. The central axis of the sound-collecting opening is inclined to face the mouth when worn, and can be inclined forward in the range of 10° to 35° with respect to the vertical direction (Z-axis), for example. The sound-collecting opening may be circular, elliptical, or elongated, and its diameter or minor axis may be in the range of 0.8 to 2.5 mm, and its major axis length may be in the range of 1.5 to 5.0 mm. There may be one sound-collecting opening, or multiple openings (e.g., 2 to 4) may be arranged on the left and right sides, and the center-to-center distance between multiple openings may be set in the range of 2 to 6 mm.

[0016] (Guide lip and hood) A guide lip may be formed around the periphery of the sound-collecting opening, projecting outward from the frame. The protrusion height of the guide lip is formed in the range of 0.3 to 1.2 mm and the thickness in the range of 0.4 to 1.5 mm to mitigate direct impact of external airflow on the opening. Furthermore, a hood may be formed on the front side of the sound-collecting opening, extending to partially cover the opening. The extension length of the hood is set in the range of 0.5 to 3.0 mm and the thickness in the range of 0.5 to 1.2 mm to suppress the direct inflow of wind noise from the front. The guide lip and / or hood may be integrally molded with the exterior of the nose portion (12) or may be realized by a separate cap member.

[0017] (acoustic guidance passage) A duct may be formed inside the nose section (12) to connect the sound-collecting opening and the microphone module. The duct may not be straight but may include a bend that bends at least once, and the bend angle may be set in the range of 60° to 120°. The effective length of the duct (from the opening inlet to the microphone receiving surface) may be 10 to 35 mm, and the average passage diameter (or hydraulic diameter) of the duct may be set in the range of 1.0 to 3.5 mm. The duct may also include a converging section in which the cross-section gradually decreases from the opening side toward the microphone side, and the cross-sectional reduction ratio (inlet cross-section / outlet cross-section) may be set in the range of 1.2 to 2.5. The combination of the bend and converging section attenuates the straight-line component of the airflow (wind noise / turbulence), allowing the acoustics of the mouth speech band to be transmitted to the microphone relatively stably. The duct may be integrally molded with the nose section (12) housing, or it may be configured as a waveguide member inserted inside the nose section (12).

[0018] (Filter / Membrane) A porous wind noise-blocking filter may be placed at the sound collection opening or duct inlet, with a filter thickness set in the range of 0.5 to 2.0 mm. Inside the filter, a water-repellent and stain-resistant membrane that allows sound to pass through while suppressing liquid intrusion may be laminated, with a membrane thickness set in the range of 10 to 80 μm. The filter and membrane are placed on a stepped structure formed around the opening and can be pressed and secured by a fixing ring or cap structure. The fixing ring may be configured to be connectable / detachable by a snap fit (locking claws and locking grooves).

[0019] (Drainage structure) A drainage pocket can be formed at the lower part of the duct or the low point of the bent part. The volume of the drainage pocket can be set within a range of, for example, 5 to 60 mm 3 and a drainage hole communicating to the outside can be formed in the drainage pocket. The diameter of the drainage hole can be set within a range of 0.3 to 1.2 mm, and the drainage hole is formed to open in a direction different from that of the sound collecting opening (for example, backward lower or sideward), so that the movement of the liquid in the microphone direction can be suppressed.

[0020] (Arrangement and vibration prevention of the microphone module) The microphone module can be arranged inside the nose part (12) so as to correspond to the duct outlet. A sealing gasket can be arranged between the microphone sound receiving surface and the duct outlet to suppress the inflow of leakage and gap noise. Further, the microphone module can be supported by a vibration prevention coupling part including an elastic bush or an elastic support frame. The thickness of the elastic bush is formed within a range of 0.5 to 2.5 mm, and the transmission of vibration caused by the frame (10) to the microphone can be reduced. The position of the microphone module can be arranged so as to be separated from the skin contact part of the wearer, and the separation distance can be set within a range of, for example, 2 to 8 mm.

[0021] FIG. 2 shows the terminal (1) of FIG. 1 from the front, and shows the outer shape in which the frame (10) is arranged along the front face of the face via the left and right rim parts (11L, 11R) and the lens parts (20L, 20R). Also, in FIG. 2, the shape in which the nose part (12) is arranged at the lower center of the frame (10) and the outer shape relationship in which the nose part (12) is coupled to the bridge region are shown. In an embodiment in which the sound collecting opening is formed on the lower surface or the front lower surface, the opening may not be directly exposed in the front view (FIG. 2). In this case, the outer shape of the nose part (12) and the internal duct / filter / membrane / drainage structure can be specifically shown by a separate drawing (for example, an enlarged cross-sectional view).

[0022] Note that the coordinate axes (X, Y, Z) shown in Figures 1 and 2 are for explaining the direction of terminal (1), and L and R refer to the left and right sides relative to the wearer. The above numerical ranges are examples to illustrate the shape characteristics and may be changed depending on the embodiment and design conditions.

Claims

1. In a glasses-type user terminal, The nose piece is located on the lower center of the frame, A sound-collecting opening is formed on the lower or front lower surface of the nasal portion and is inclined to face the user's mouth when worn, An acoustic induction passage formed inside the nose portion and communicating with the sound collection opening, A microphone module is positioned inside the nose portion so as to correspond to the exit of the acoustic induction passage, Equipped with, A guide lip is provided that protrudes from the outer surface of the frame at the periphery of the sound-collecting opening. A hood is provided on the front side of the sound collection opening, extending so as to partially cover the sound collection opening. The aforementioned acoustic induction path is characterized by including a bent section that bends at least once in order to attenuate the straight-line component of the airflow, thus forming a spectacle-type user terminal.

2. The central axis of the sound-collecting aperture is formed to be inclined forward by 10° to 35° with respect to the vertical direction. The spectacle-type user terminal according to claim 1, characterized in that the sound-collecting aperture is formed in the shape of a circle, an ellipse, or an elongated hole, and in the case of a circle, the effective diameter is in the range of 0.8 mm to 2.5 mm, and in the case of an ellipse or an elongated hole, the minor axis is in the range of 0.8 mm to 2.5 mm and the major axis length is in the range of 1.5 mm to 5.0 mm.

3. The acoustic induction passage includes a converging section whose cross-section gradually decreases as it moves from the sound collection opening side toward the microphone module side. The spectacle-type user terminal according to claim 2, characterized in that the effective length of the acoustic induction passage is in the range of 10 mm to 35 mm, and the average passage diameter or hydraulic diameter of the acoustic induction passage is in the range of 1.0 mm to 3.5 mm.

4. A porous wind noise blocking filter is placed at the sound collection opening or the entrance to the acoustic induction passage, and a water-repellent and stain-resistant membrane is laminated inside the wind noise blocking filter. The wind noise blocking filter and the water-repellent / stain-resistant membrane are placed on a stepped structure formed around the sound collection opening and pressed and fixed by a fixing ring or cap structure. The spectacle-type user terminal according to claim 3, characterized in that the thickness of the wind noise blocking filter is in the range of 0.5 mm to 2.0 mm, and the thickness of the water-repellent and stain-resistant membrane is in the range of 10 μm to 80 μm.

Images