A bone conduction acoustic device

Abstract

This invention belongs to the field of electroacoustic product technology, and particularly relates to a bone conduction acoustic device, including a housing, a bone conduction vibrator, and a vibration transmission component connecting the vibration output section and the soft vibrating section of the bone conduction vibrator. A radial support structure is provided between the cavity portion of the bone conduction vibrator away from the soft vibrating section and the bone conduction vibrator. Multiple front venting holes are spaced apart on the sidewall portion of the housing surrounding the soft vibrating section, and multiple rear venting holes are spaced apart circumferentially on the sidewall portion of the housing away from the soft vibrating section. The radial support structure can form radial confinement, preventing radial deflection during bone conduction vibrator vibration and improving acoustic performance. Sound signals are transmitted from the multiple front venting holes and multiple rear venting holes, generating sound pressure cancellation at the periphery of the housing, reducing sound leakage. This solves the problems of high sound leakage and poor acoustic performance in existing bone conduction acoustic devices.

Description

Technical Field

[0001] This invention belongs to the field of electroacoustic product technology, and in particular relates to a bone conduction acoustic device. Background Technology

[0002] Bone conduction is a sound transmission method that converts sound into mechanical vibrations of different frequencies to transmit sound waves, enabling clear sound reproduction even in noisy environments. Currently, bone conduction headphones, hearing aids, and other bone conduction acoustic devices utilize bone conduction to transmit sound waves and are increasingly appearing in daily life.

[0003] Existing bone conduction acoustic devices have the following main problems: during normal calls or music playback, there is significant sound leakage, which can easily disturb people nearby and also leak confidential information; when worn, the bone conduction vibrator of the bone conduction acoustic device will shift axially due to gravity, resulting in a deviation between the actual acoustic performance emitted by the bone conduction acoustic device and the calibrated acoustic performance, leading to relatively poor acoustic performance of the bone conduction acoustic device. Summary of the Invention

[0004] The purpose of this invention is to provide a bone conduction acoustic device that addresses the problems of high sound leakage and poor acoustic performance in existing bone conduction acoustic devices.

[0005] This invention discloses a bone conduction acoustic device, which includes a housing and a bone conduction vibrator disposed within a cavity enclosed by the housing. A soft vibrating part is provided on one side of the housing. A vibration transmission element is connected between the vibration output part of the bone conduction vibrator and the soft vibrating part. A radial support structure is provided between the cavity portion of the bone conduction vibrator on the side away from the soft vibrating part and the bone conduction vibrator. A plurality of front venting holes are spaced apart on the sidewall portion of the housing around the soft vibrating part, and a plurality of rear venting holes are spaced apart circumferentially on the sidewall portion of the housing away from the soft vibrating part.

[0006] As an improvement, a mounting shaft is fixedly connected to the side of the bone conduction oscillator away from the soft vibrating part; the radial support structure includes a bracket fixedly connected to the outer shell, a mounting hole is provided on the bracket corresponding to the mounting shaft, the mounting shaft is inserted into the mounting hole, and also includes a plurality of balls arranged between the mounting hole and the mounting shaft and spaced circumferentially along the mounting shaft, and a plurality of elastic telescopic members respectively provided at the plurality of balls, the plurality of balls respectively abutting on the outer peripheral side of the mounting shaft.

[0007] As an improvement, a radial hole is provided on the inner wall of the mounting hole for each set of elastic telescopic members and the ball bearings. The elastic telescopic members are disposed in the radial holes, and the ball bearings are disposed at the ends of the radial holes, with a portion of them protruding outside the radial holes.

[0008] As an improvement, a sound-permeable mesh layer is installed in the cavity between the bone conduction vibrator and the soft vibrating part. The sound-permeable mesh layer divides the cavity enclosed by the outer shell into a front acoustic cavity and a rear acoustic cavity. The bone conduction vibrator is disposed in the rear acoustic cavity, and the vibration transmission element passes through the sound-permeable mesh layer. The front sound vent is disposed corresponding to the front acoustic cavity, and the rear sound vent is disposed corresponding to the rear acoustic cavity.

[0009] As an improvement, a vibration spring arm is also fixedly installed in the cavity between the bone conduction oscillator and the soft vibration part, and the sound-permeable mesh layer is fixed on the vibration spring arm.

[0010] As an improvement, the sound-permeable mesh layer is made of mesh fabric and is bonded and fixed to the vibrating spring arm.

[0011] As an improvement, the vibrating spring arm includes an outer ring, an inner ring concentrically arranged with the outer ring, and multiple spring arms connected between the outer ring and the inner ring, wherein the vibration transmission element passes through the inner ring and is fixedly connected to the inner ring.

[0012] As an improvement, the outer ring, the multiple elastic arms, and the inner ring are integrally molded parts.

[0013] As an improvement, the outer shell includes a box-shaped shell, an upper cover covering the opening end of the box-shaped shell, a soft vibrating part disposed on the upper cover, a plurality of rear sound vents disposed on the peripheral sidewall of the box-shaped shell, and a bracket disposed on the bottom sidewall of the box-shaped shell.

[0014] As an improvement, the bracket is plate-shaped and fixedly connected to the bottom side wall of the box-shaped shell, or the bracket and the bottom side wall of the box-shaped shell are an integral structure.

[0015] As a result of the above-mentioned technical solution, the folding shaft mechanism of the present invention includes a bone conduction acoustic device comprising a housing and a bone conduction vibrator disposed within the cavity enclosed by the housing. A soft vibrating part is provided on one side of the housing. A vibration transmission element is connected between the vibration output part of the bone conduction vibrator and the soft vibrating part. A radial support structure is provided between the cavity portion on the side of the bone conduction vibrator away from the soft vibrating part and the bone conduction vibrator. A plurality of front sound venting holes are spaced apart on the sidewall portion of the housing around the soft vibrating part. A plurality of rear sound venting holes are spaced apart circumferentially on the sidewall portion of the housing away from the soft vibrating part. When worn, the soft vibrating part comes into contact with the user. The bone conduction oscillator emits a sound signal and generates vibrations at a corresponding frequency. The vibration is transmitted to the soft vibrating part through a vibration transmission component, and then transmitted to the user through the soft vibrating part. Because a radial support structure is provided on the side of the bone conduction oscillator away from the soft vibrating part, radial limitation can be formed, preventing radial deviation during the vibration of the bone conduction oscillator and improving the acoustic performance of the bone conduction acoustic device. Because multiple front sound leakage holes are spaced apart on the side wall of the outer shell around the soft vibrating part, and multiple rear sound leakage holes are spaced apart circumferentially on the side wall of the outer shell away from the soft vibrating part, the sound signal is transmitted from the multiple front sound leakage holes and multiple rear sound leakage holes respectively, and sound pressure cancellation is generated at the periphery of the outer shell, which can reduce sound leakage. The bone conduction acoustic device of the present invention solves the problems of large sound leakage and poor acoustic performance of existing bone conduction acoustic devices. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural schematic diagram of the bone conduction acoustic device according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the installation structure of the vibration spring arm and the sound-transmitting mesh layer of the bone conduction acoustic device according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the vibrating spring arm of the bone conduction acoustic device according to an embodiment of the present invention;

[0019] Among them, 11, bottom shell, 12, top cover, 13, soft vibrating part, 14, front sound vent, 15, rear sound vent, 21, bone conduction vibrator, 22, vibration transmission component, 23, mounting shaft, 31, vibration spring arm, 311, outer ring, 312, inner ring, 313, spring arm, 32, sound-permeable mesh layer, 41, bracket, 42, ball bearing, 43, elastic telescopic component. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Figures 1 to 3 This is a schematic diagram of the structure of a bone conduction acoustic device according to an embodiment of the present invention, wherein, Figure 1 A cross-sectional schematic diagram of a bone conduction acoustic device according to an embodiment of the present invention is shown. Figure 2 This diagram illustrates the installation structure of the vibrating spring arm and the sound-permeable mesh layer of the bone conduction acoustic device according to an embodiment of the present invention. Figure 3 A schematic diagram of the vibrating spring arm of a bone conduction acoustic device according to an embodiment of the present invention is shown. For ease of explanation, only the parts relevant to the embodiment of the present invention are shown in the figure.

[0022] Depend on Figure 1 , Figure 2 and Figure 3 It is known that the bone conduction acoustic device includes a housing and a bone conduction vibrator 21 disposed in the cavity enclosed by the housing. A soft vibrating part 13 is provided on one side of the housing. A vibration transmission element 22 is connected between the vibration output part of the bone conduction vibrator 21 and the soft vibrating part 13. A radial support structure is provided between the cavity part of the bone conduction vibrator 21 away from the soft vibrating part 13 and the bone conduction vibrator 21. A plurality of front sound venting holes 14 are provided at intervals on the side wall part of the housing around the soft vibrating part 13. A plurality of rear sound venting holes 15 are provided at intervals along the circumference on the side wall part of the housing away from the soft vibrating part 13.

[0023] When worn, the soft vibrating part 13 comes into contact with the user. The bone conduction vibrator 21 emits a sound signal and generates vibrations of a corresponding frequency. The vibration is transmitted to the soft vibrating part 13 through the vibration transmission member 22, and then transmitted to the user through the soft vibrating part 13. Since a radial support structure is provided on the side of the bone conduction vibrator 21 away from the soft vibrating part 13, radial limitation can be formed, avoiding radial deviation when the bone conduction vibrator 21 vibrates, thus improving the acoustic performance of the bone conduction acoustic device. Since multiple front sound leakage holes 14 are provided at intervals on the side wall of the outer shell around the soft vibrating part 13, and multiple rear sound leakage holes 15 are provided at intervals along the circumference on the side wall of the outer shell away from the soft vibrating part 13, the sound signal is transmitted from the multiple front sound leakage holes 14 and the multiple rear sound leakage holes 15 respectively, and the sound pressure is canceled at the periphery of the outer shell, which can reduce sound leakage. The bone conduction acoustic device of the present invention solves the problems of large sound leakage and poor acoustic performance of existing bone conduction acoustic devices.

[0024] In this embodiment, a mounting shaft 23 is fixedly connected to the side of the bone conduction vibrator 21 away from the soft vibrating part 13. The radial support structure includes a bracket 41 fixedly connected to the outer shell, with a mounting hole on the bracket 41 corresponding to the mounting shaft 23. The mounting shaft 23 is inserted into the mounting hole. The structure also includes a plurality of ball bearings 42 arranged circumferentially between the mounting hole and the mounting shaft 23, and a plurality of elastic telescopic members 43 corresponding to the ball bearings 42. The ball bearings 42 abut against the outer peripheral side of the mounting shaft 23. Under the elastic force of the elastic telescopic members 43, the ball bearings 42 abut against the outer peripheral side of the mounting shaft 23, forming a radial constraint to achieve centering, preventing radial deviation of the bone conduction vibrator 21 during vibration, ensuring that the axial vibration of the bone conduction vibrator 21 will not deviate, and improving the acoustic performance of the bone conduction acoustic device.

[0025] Specifically, a radial hole is provided on the inner wall of the mounting hole for each set of elastic telescopic member 43 and ball 42. The elastic telescopic member 43 is located in the radial hole, and the ball 42 is located at the end of the radial hole with a portion protruding outside the radial hole.

[0026] Typically, the elastic telescopic component 43 is a spring.

[0027] In this embodiment, a sound-permeable mesh layer 32 is provided in the cavity between the bone conduction vibrator 21 and the soft vibrating part 13. This sound-permeable mesh layer 32 divides the cavity enclosed by the outer shell into a front acoustic cavity and a rear acoustic cavity. The bone conduction vibrator 21 is disposed in the rear acoustic cavity, and the vibration transmission component 22 passes through the sound-permeable mesh layer 32. The front sound leakage hole 14 is disposed corresponding to the front acoustic cavity, and the rear sound leakage hole 15 is disposed corresponding to the rear acoustic cavity. The sound-permeable mesh layer 32 blocks the sound signal emitted by the bone conduction vibrator 21, so that the sound signals transmitted from the multiple front sound leakage holes 14 and the multiple rear sound leakage holes 15 generate more sound pressure cancellation at the periphery of the outer shell, thereby further reducing sound leakage.

[0028] A vibration spring arm 31 is also fixedly installed in the cavity between the bone conduction oscillator 21 and the soft vibration part 13. The sound-permeable mesh layer 32 is fixed on the vibration spring arm 31, which not only facilitates the installation of the sound-permeable mesh layer 32, but also enhances the axial vibration performance of the bone conduction oscillator 21. The vibration spring arm 31 includes an outer ring 311, an inner ring 312 concentrically arranged with the outer ring 311, and multiple spring arms 313 connecting the outer ring 311 and the inner ring 312. The vibration transmission element 22 passes through the inner ring 312 and is fixedly connected to the inner ring 312. Typically, the outer ring 311, the multiple spring arms 313, and the inner ring 312 are integral parts formed by injection molding.

[0029] Specifically, the sound-permeable mesh layer 32 is made of mesh fabric and is fixedly connected to the vibrating spring arm 31 by adhesive bonding.

[0030] In this embodiment, the outer shell includes a box-shaped shell 11, an upper cover 12 covering the opening end of the box-shaped shell 11, a soft vibration part 13 disposed on the upper cover 12, a plurality of rear sound leakage holes 15 disposed on the peripheral side wall of the box-shaped shell 11, and a bracket 41 disposed on the bottom side wall of the box-shaped shell 11.

[0031] Typically, the bracket 41 is plate-shaped and fixedly connected to the bottom side wall of the box-shaped shell 11. Of course, it can also be an integral structure with the bottom side wall of the box-shaped shell 11.

[0032] The above description is merely some embodiments of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bone conduction acoustic device, comprising a housing and a bone conduction vibrator disposed within a cavity enclosed by the housing, wherein a soft vibrating part is provided on one side of the housing, and a vibration transmission element is connected between the vibration output part of the bone conduction vibrator and the soft vibrating part, characterized in that, A radial support structure is provided between the cavity portion of the bone conduction vibrator on the side away from the soft vibrating part and the bone conduction vibrator. Multiple front sound venting holes are spaced apart on the outer shell sidewall portion around the soft vibrating part, and multiple rear sound venting holes are spaced apart circumferentially on the outer shell sidewall portion away from the soft vibrating part. A mounting shaft is fixedly connected to the side of the bone conduction oscillator away from the soft vibrating part; the radial support structure includes a bracket fixedly connected to the outer shell, a mounting hole provided on the bracket corresponding to the mounting shaft, the mounting shaft being inserted into the mounting hole, and a plurality of balls arranged between the mounting hole and the mounting shaft and spaced circumferentially along the mounting shaft, and a plurality of elastic telescopic members respectively provided at the plurality of balls; a radial hole is provided on the inner sidewall of the mounting hole corresponding to each group of elastic telescopic members and balls, the elastic telescopic members are disposed in the radial holes, and the balls are disposed at the ends of the radial holes with a portion protruding outside the radial holes, so that the plurality of balls respectively abut against the outer peripheral side of the mounting shaft under the action of the corresponding elastic telescopic members.

2. The bone conduction acoustic device according to claim 1, characterized in that, A sound-permeable mesh layer is installed in the cavity between the bone conduction vibrator and the soft vibrating part. The sound-permeable mesh layer divides the cavity enclosed by the outer shell into a front acoustic cavity and a rear acoustic cavity. The bone conduction vibrator is disposed in the rear acoustic cavity, and the vibration transmission element passes through the sound-permeable mesh layer. The front sound vent is disposed corresponding to the front acoustic cavity, and the rear sound vent is disposed corresponding to the rear acoustic cavity.

3. The bone conduction acoustic device according to claim 2, characterized in that, A vibration spring arm is also fixedly installed in the cavity between the bone conduction vibrator and the soft vibration part, and the sound-permeable mesh layer is fixed on the vibration spring arm.

4. The bone conduction acoustic device according to claim 3, characterized in that, The sound-permeable mesh layer is made of mesh fabric and is bonded and fixed to the vibrating spring arm.

5. The bone conduction acoustic device according to claim 3, characterized in that, The vibrating spring arm includes an outer ring, an inner ring concentrically arranged with the outer ring, and multiple spring arms connected between the outer ring and the inner ring. The vibration transmission element passes through the inner ring and is fixedly connected to the inner ring.

6. The bone conduction acoustic device according to claim 5, characterized in that, The outer ring, the multiple elastic arms, and the inner ring are integral parts formed by injection molding.

7. The bone conduction acoustic device according to any one of claims 1 to 6, characterized in that, The outer shell includes a box-shaped shell, an upper cover covering the opening end of the box-shaped shell, a soft vibrating part disposed on the upper cover, a plurality of rear sound vents disposed on the peripheral sidewall of the box-shaped shell, and a bracket disposed on the bottom sidewall of the box-shaped shell.

8. The bone conduction acoustic device according to claim 7, characterized in that, The bracket is plate-shaped and is fixedly connected to the bottom side wall of the box-shaped shell, or the bracket and the bottom side wall of the box-shaped shell are an integral structure.

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