A headset

Abstract

The present invention discloses an earphone, comprising an earphone shell, and a speaker and a microphone arranged in the earphone shell. The earphone shell comprises a cavity and a rod portion, the speaker is arranged in the cavity, and the microphone is arranged in the rod portion. The cross-section of the rod portion is in a non-circular shape, and the outer contour of the cross-section of the rod portion is streamlined. The curvature of the outer contour of the cross-section close to the human ear is smaller than the curvature of the outer contour away from the human ear. The earphone of the present invention can reduce the wind resistance of the airflow on the outer surface of the rod portion, reduce wind noise, ensure the stability of the microphone signal, and thus ensure the sound quality.

Description

Technical Field

[0001] The present invention relates to the field of electroacoustic technology, in particular to a headset. Background Art

[0002] Sports headphones are headphones worn during exercise. What distinguishes them from ordinary headphones is that they can be worn stably on the ears and will not fall off the ears due to body movement. They are generally drip-proof, lightweight, and have good breathability. They are open-ear headphones.

[0003] In addition to stability, sports headphones also need to consider sound quality. This is because during exercise, such as running, there will be high wind speeds. The shells of existing sports headphones are mostly round and smooth surfaces. In high wind speeds, large boundary layer separation will occur, and a large pressure difference force will be generated near the headphones, causing the shell to vibrate. After the vibration is transmitted from the shell to the inside of the headphones, it will affect the stability of the microphone signal and seriously affect the sound quality. Summary of the Invention

[0004] In view of this, an earphone is provided which can effectively reduce the pressure difference at high wind speed.

[0005] The present invention provides an earphone, comprising an earphone shell and a speaker and a microphone arranged in the earphone shell, the earphone shell comprising a cavity and a rod portion, the speaker being arranged in the cavity, and the microphone being arranged in the rod portion, the cross-section of the rod portion being in a non-circular shape, the outer contour of the cross-section of the rod portion being streamlined, and the curvature of the outer contour of the cross-section on the side close to the human ear being smaller than the curvature of the outer contour on the side away from the human ear.

[0006] Furthermore, the cross-section is fusiform with narrow ends and wide in the middle, the end of the cross-section away from the human ear is the windward end, and the end close to the human ear is the leeward end, and the maximum width of the cross-section is relatively close to the windward end and away from the leeward end.

[0007] Furthermore, the distance between the maximum width position of the cross section and the windward end is 1 / 4 to 2 / 5 of the maximum length of the cross section.

[0008] Furthermore, the radius of curvature of the outer contour of the cross section gradually increases from the windward end to the maximum width position of the cross section and then gradually decreases toward the leeward end.

[0009] Furthermore, the rate of change of the curvature increase of the outer contour of the cross section is 1.2 to 2 times the rate of change of the curvature decrease.

[0010] Furthermore, a plurality of recesses are provided on the outer surface of the rod portion.

[0011] Furthermore, the depth of the recess in the thickness direction of the rod portion is 1 / 50 to 1 / 20 of the maximum length of the cross section of the rod portion.

[0012] Furthermore, the depression is in the shape of a spherical cap, and the depth of the depression in the thickness direction of the stem portion is 1 / 5 to 1 / 3 of the diameter of a sphere corresponding to the spherical cap.

[0013] Furthermore, a rounded corner is formed between the recess and the outer surface of the rod portion, and the size of the rounded corner is 1 / 2 to 2 / 3 of the depth of the recess in the thickness direction of the rod portion.

[0014] Furthermore, the depressions include multiple rows, and the depressions in adjacent rows are distributed in a staggered manner.

[0015] Compared with the prior art, the cross-sectional shape of the stem portion of the earphone shell of the present invention is non-circular, and the outer contour of the cross-sectional shape of the stem portion is streamlined, which can reduce the wind resistance of the airflow on the outer surface of the stem portion, reduce wind noise, ensure the stability of the microphone signal and thus ensure the sound quality. In addition, the curvature of the outer contour of the cross-sectional shape close to the human ear is smaller than the curvature of the outer contour away from the human ear. The curvature close to the human ear allows the wind to flow more smoothly, improving the noise reduction performance of the earphone, and when it is close to the ear, the wearing comfort and stability are better; and a depression is set on the outer surface of the stem portion, introducing disturbances to turn the laminar boundary layer behind the stem portion into a turbulent boundary layer, so that the wake area is further reduced, the pressure difference resistance is reduced, the vibration of the earphone shell is reduced, and the wind noise is reduced, ensuring the stability of the microphone signal and thus ensuring the sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 1 is a structural diagram of an earphone according to an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the cross section of the stem portion of the earphone of the present invention.

[0018] Figure 3 Schematic diagram of the structure of the outer surface of the stem portion of the earphone of the present invention.

[0019] Figure 4 for Figure 2 Magnified view of middle circle IV.

[0020] Figure 5 Schematic diagram of airflow boundary layer separation in the earphone of the present invention.

[0021] Figure 6 Schematic diagram of the boundary layer separation of airflow in existing headphones. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate one or more embodiments of the present invention to provide a more accurate and thorough understanding of the technical solutions disclosed herein. However, it should be understood that the present invention can be implemented in a variety of different forms and is not limited to the embodiments described below.

[0023] The same or similar numbers in the drawings of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] like Figure 1 As shown, the earphone of the present invention includes an earphone shell 100 and electronic components such as a speaker and a microphone arranged in the earphone shell 100.

[0025] The earphone shell 100 includes a cavity 10 and a rod portion 20 extending outward from the cavity 10. A speaker is arranged in the cavity 10, and the speaker converts the received electrical signal into voice and outputs it to the user. Preferably, an ear cap 12 is provided on the end of the cavity 10 facing the inner ear, and the ear cap 12 is made of soft rubber material to increase the comfort of wearing the earphone of the present invention. A microphone is arranged in the rod portion 20, and the microphone is used to receive the user's voice and convert it into an electrical signal for external output. Through the cooperation of the speaker and the microphone, two-way transmission of voice is achieved. In the illustrated embodiment, a single earphone shell 100 is exemplarily shown. It should be understood that the rod portions 20 of two earphone shells 100 can also be connected by an earphone cable to form a pair of earphones.

[0026] During use, the present invention's headphones often experience high wind speeds due to the user's rapid movements. To reduce the impact of high wind speeds on the microphone, the present invention designs the stem portion 20 of the earphone housing 100 to have a non-circular structure. In other words, the cross-section of the stem portion 20 is non-circular. Preferably, the cross-section of the stem portion 20 is streamlined, which reduces wind resistance on the outer surface of the stem portion 20 and reduces wind noise. Figure 2 The figure shows a cross-sectional view of the stem portion 20 of a specific embodiment of the earphone of the present invention. The cross section of the stem portion 20 is generally a spindle-shaped structure with narrow ends and wide in the middle. The direction of the line connecting the two ends of the cross section of the stem portion 20 is the length direction of the cross section, i.e. Figure 2The X direction shown, the connection line A-A at both ends of the cross-section is the long axis of the cross-section; the direction perpendicular to the length direction is the width direction of the cross-section, that is Figure 2 The Y direction shown, the connection line B-B at the maximum width of the outer contour of the cross-section is the short axis of the cross-section.

[0027] When the earphone of the present invention is in use, the flow direction of the air flow is generally consistent with the length direction of the cross-section, that is, the X direction. The part of the outer surface of the rod portion 20 facing the air flow is used as the windward surface 22, and the part facing away from the air flow is used as the leeward surface 24. On the cross-section of the rod portion 20, the end facing the air flow is the windward end, and the end facing away from the air flow is the leeward end. The part of the outer contour of the cross-section between the windward end and the maximum width position of the cross-section is the windward surface 22, and the part between the leeward end and the maximum width position of the cross-section is the leeward surface 24. That is to say, the axial plane where the maximum width position of the cross-section, that is, the short axis B-B is located, is the interface between the windward surface 22 and the leeward surface 24. Along the flow direction of the air flow, the width of the windward surface 22 gradually increases towards the interface 26, and the width of the leeward surface 24 gradually decreases from the interface 26. In this way, the windward surface 22 follows the flow and the leeward surface 24 guides the flow, making more air flow towards the wake region of the rod portion 20, reducing the size of the wake region and reducing wind noise.

[0028] Preferably, the interface 26 between the windward surface 22 and the leeward surface 24 deviates from the exact center of the length direction of the cross-section, relatively close to the windward end and far from the leeward end. The total length of the cross-section, that is, the length of its long axis A-A, is defined as L0. The length of the distance between the interface 26 and the windward end of the cross-section is defined as L1, and the length of the distance between the interface 26 and the leeward end of the cross-section is defined as L2, where L1 < L2 < L0, and L1 is about 1 / 4 to 2 / 5 of L0. Since the interface 26 is relatively close to the windward end of the cross-section, the curvature change of the windward surface 22 is greater than the curvature change of the leeward surface 24. Along the flow direction of the air flow, the curvature radius of the windward surface 22 gradually increases, and the curvature radius of the leeward surface 24 gradually decreases. The rate of change of the increase in the curvature of the windward surface 22 is 1.2 to 2 times the rate of change of the decrease in the curvature of the leeward surface 24, which can better guide the air flow to the wake region.

[0029] Preferably, taking the long axis A-A of the cross-section of the rod portion 20 as the dividing line, the parts of the outer contour of the cross-section on both sides of the dividing line are arranged asymmetrically. According to Figure 2In the direction shown, the curvature of the portion of the outer contour of the cross section located on the upper side of the major axis AA is slightly greater than that of the portion located on the lower side of the major axis AA, that is, the portion of the outer contour of the cross section located on the upper side of the major axis AA is more curved, and the portion located on the lower side of the major axis AA is smoother. Overall, the outer contour of the cross section is similar to the shape of a fish belly or a wing, and is streamlined with good fluid dynamics. When the airflow flows through the outer surface of the rod 20, the wind resistance is smaller, the wind noise is lower, and the sound effect is better. When the earphones of the present invention are worn, the portion of the outer contour of the cross section located on the lower side of the major axis AA (i.e., the portion with a smaller curvature) is in contact with the ear, and the portion of the outer contour located on the upper side of the major axis AA (i.e., the portion with a larger curvature) is away from the ear. The curvature of the outer contour of the cross section on the side close to the human ear is smaller than the curvature of the outer contour on the side away from the human ear. In this way, the wind can flow more smoothly through the curvature of the rod 20 on the side close to the human ear, thereby improving the noise reduction performance of the earphones. When the earphones are close to the ears, the wearing comfort and stability are better.

[0030] Preferably, if Figure 2 and Figure 4 As shown, the outer surface of the stem 20 is provided with a large number of depressions 28. These depressions 28 can be integrally formed with the stem 20, such as by integral injection molding. In the thickness direction of the stem 20, the depth D of the depressions 28 relative to the outer surface of the stem 20 is 1 / 50 to 1 / 20 of the maximum diameter of the stem 20, or 1 / 50 to 1 / 20 of the length L0 of the major axis AA of the cross section of the stem 20. Preferably, the depressions 28 are spherical, with a depth D of 1 / 5 to 1 / 3 of the diameter D0 of the corresponding sphere. This prevents the depressions 28 from being too small, which would negatively affect airflow, and the depressions 28 from being too large, which would be difficult to mold. Preferably, the intersection of the depressions 28 and the outer surface of the stem 20 is rounded 29 to ensure a smooth transition between the two. The rounded corners 29 are 1 / 2 to 2 / 3 of the depth D of the depressions 28, to avoid a sudden change in cross-section that would affect the feel of the user.

[0031] Preferably, if Figure 3As shown, the depressions 28 are arranged in an array of multiple rows and columns, with adjacent rows of depressions 28 arranged in a staggered pattern. In the illustrated embodiment, the columns of depressions 28 in odd-numbered rows are aligned with each other, while the columns of depressions 28 in even-numbered rows are aligned with each other. The columns of depressions 28 in odd-numbered rows are staggered with the columns of depressions 28 in even-numbered rows by half a depression 28. This allows the center of each depression 28 in an odd-numbered row to face the edge of a depression 28 in an even-numbered row, and the center of each depression 28 in an even-numbered row to face the edge of a depression 28 in an odd-numbered row. The depressions 28 are distributed in a fish-scale pattern overall, further reducing wind resistance. When airflow passes over the surface of the rod 20, the depressions 28 turbulently change the boundary layer of the airflow near the surface of the rod 20 from laminar flow to turbulent flow. The turbulent boundary layer has relatively greater kinetic energy, meaning that airflow near the outer surface of the rod 20 can propagate backward with greater kinetic energy.

[0032] Please also see Figure 5 and Figure 6 , Figure 6 Figure 2 is a schematic diagram of the airflow boundary layer of the round rod 20' in an existing earphone structure. The airflow separates from the surface of the round rod 20' at a position slightly in front of the middle of the round rod 20', making the width of the wake area behind the round rod 20' no less than the diameter of the round rod 20'. This results in a large wake area, a large pressure difference between the front and rear, high wind noise, and poor sound quality. Figure 5 The figure shows a schematic diagram of the airflow boundary layer of the stem portion 20 of the earphone of the present invention. It can be clearly seen from the figure that since the boundary surface 26 between the windward surface 22 and the leeward surface 24 of the stem portion 20 is close to the front, the airflow gradually concentrates toward the middle after passing through the boundary surface 26 under the guidance of the longer and gradually narrowing leeward surface 24, so that the separation point of the airflow boundary layer is close to the leeward end of the stem portion 20. Correspondingly, the wake area behind the stem portion 20 is quite narrow, which effectively reduces the front-to-rear pressure difference and reduces wind noise.

[0033] In addition, since the outer surface of the rod 20 is provided with a recess 28, the recess 28 acts like a turbulence generator, introducing disturbances and using lateral momentum to supplement the airflow close to the surface of the rod 20 to twist and turn, turning the laminar boundary layer behind the rod 20 into a turbulent boundary layer, destroying the sudden increase in resistance caused by the separation of the laminar boundary layer, thereby reducing the resistance. The airflow has greater kinetic energy to propagate backward, and the inertial force is stronger, so that the separation point of the airflow boundary layer is further moved backward, and the wake area is further reduced. The wake area represents low pressure, and the smaller the low-pressure area, the smaller the pressure difference resistance. At high wind speeds, the pressure difference resistance is dominant, so the total resistance is small, the vibration of the earphone shell 100 is small, and the wind noise is reduced, ensuring the stability of the microphone signal and thus the sound quality.

[0034] It should be noted that the present invention is not limited to the above-mentioned embodiments. Based on the creative spirit of the present invention, those skilled in the art can also make other changes. These changes made based on the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. An earphone comprising an earphone shell and a speaker and a microphone disposed in the earphone shell, characterized in that: The earphone shell includes a cavity and a rod portion, the speaker is arranged in the cavity, and the microphone is arranged in the rod portion, the cross-section of the rod portion is in a non-circular shape, and the outer contour of the cross-section of the rod portion is streamlined, with the long axis of the cross-section of the rod portion as the dividing line, and the outer contour of the cross-section located on both sides of the dividing line is asymmetrically arranged, and the curvature of the outer contour of the cross-section close to the human ear is smaller than the curvature of the outer contour away from the human ear; a plurality of depressions are provided on the outer surface of the rod portion, and the depressions include multiple rows, and the depressions in adjacent rows are staggered.

2. The earphone according to claim 1, wherein The cross section is fusiform with narrow ends and wide in the middle. The end of the cross section away from the human ear is the windward end, and the end close to the human ear is the leeward end. The maximum width of the cross section is relatively close to the windward end and away from the leeward end.

3. The earphone according to claim 2, wherein The maximum width position of the cross section is 1 / 4 to 2 / 5 of the maximum length of the cross section from the windward end.

4. The earphone according to claim 2, wherein The curvature of the outer contour of the cross section gradually increases from the windward end to the maximum width position of the cross section and then gradually decreases toward the leeward end.

5. The earphone according to claim 4, wherein The rate of change of the curvature increase of the outer contour of the cross section is 1.2 to 2 times the rate of change of the curvature decrease.

6. The earphone according to claim 1, wherein The depth of the recess in the thickness direction of the stem portion is 1 / 50 to 1 / 20 of the maximum length of the cross section of the stem portion.

7. The earphone according to claim 1, wherein The recess is in the shape of a spherical cap, and the depth of the recess in the thickness direction of the stem portion is 1 / 5 to 1 / 3 of the diameter of the sphere corresponding to the spherical cap.

8. The earphone according to claim 1, wherein The corner between the recess and the outer surface of the rod portion is rounded, and the size of the rounded corner is 1 / 2 to 2 / 3 of the depth of the recess in the thickness direction of the rod portion.

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