Ear shell assembly and earphone

Abstract

The utility model discloses an ear shell assembly and an earphone, and relates to the technical field of wireless earphones, the ear shell assembly comprises a shell, a loudspeaker and a capacitance detection device, the shell is provided with an installation cavity, and a sound production surface is formed on one side of the shell; the loudspeaker is arranged in the mounting cavity and is provided with a sound production port facing the sound production surface and a bottom end opposite to the sound production port; the capacitance detection device is provided with a capacitance plate, the capacitance detection device is arranged in the mounting cavity, the capacitance plate is located between the bottom end of the loudspeaker and the sounding surface, a first plate body and a second plate body of the capacitance plate are arranged at intervals in the radial direction of the sounding surface of the loudspeaker, and a third plate body of the capacitance plate is used for fixedly connecting the first plate body and the second plate body. According to the technical scheme provided by the utility model, the capacitor plate is arranged between the bottom end of the loudspeaker and the sound production surface, so that the distance from the capacitor plate to the human ear is smaller, the capacitance generated when the human ear enters a corresponding area and is opposite to the capacitor plate is larger, and the detection accuracy when the ear shell assembly is worn on the human ear or is not worn on the human ear is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless earphones, in particular to an ear shell component and an earphone. Background Art

[0002] With the development of the times, the user experience of products is becoming more and more intelligent, and the wearing function has gradually become a standard feature in mid-to-high-end headphones. Through wearing detection, music can be played / paused, calls can be switched, and active noise reduction can be turned on / off; and low power consumption mode and automatic shutdown can be achieved by taking off the headphones.

[0003] However, there are some defects in the single capacitive sensor solution used in the market to achieve wearing detection. For example, wearing the headphones on your head while walking, going up and down stairs, or riding in a car may be misidentified as an ear-out error, and wearing off-center may cause the wearing to fail to be recognized. As a result, when users put on the headphones, they will not automatically play and actively reduce noise, and when wearing them, the music playback will be mistakenly paused, the active noise reduction will disappear, and calls will be mistakenly switched back to the phone, which is a bad experience. Utility Model Content

[0004] The main purpose of the utility model is to provide an ear shell component and an earphone, and in particular to an ear shell component for improving the accuracy of detecting when the ear shell component is worn or detached from the human ear.

[0005] To achieve the above-mentioned purpose, the utility model proposes an ear shell component, which includes a shell, a speaker, and a capacitance detection device; the shell has an installation cavity, and a sound-emitting surface is formed on one side of the shell; the speaker is arranged in the installation cavity, and has a sound-emitting port arranged toward the sound-emitting surface, and a bottom end opposite to the sound-emitting port; the capacitance detection device has a capacitor plate, the capacitor detection device is arranged in the installation cavity, and the capacitor plate is located between the bottom end of the speaker and the sound-emitting surface; wherein the capacitor plate has a first plate body, a second plate body and a third plate body, the first plate body and the second plate body are radially spaced along the sound-emitting port of the speaker, and the third plate body is used to fix the first plate body and the second plate body in connection.

[0006] In one embodiment, the capacitor plate is disposed between the sound-emitting port of the speaker and the sound-emitting surface; the speaker has a top end disposed opposite to the bottom end, and the capacitor plate is mounted on the top end.

[0007] In one embodiment, a positioning column is provided at the top of the speaker, and a positioning hole is correspondingly provided at the first plate body, the positioning column and the positioning hole are limitedly matched, and the top of the speaker is glued to the first plate body.

[0008] In one embodiment, the capacitor plate is disposed at the periphery of the sound outlet.

[0009] In one embodiment, the capacitor plate is arranged around the outer circumference of the sound outlet.

[0010] In one embodiment, it is characterized in that the acute angle between the plane where the capacitor plate is located and the plane where the sound-emitting surface is located is α, and 10°≤α≤20°.

[0011] In one embodiment, the angle between the plane where the sound outlet is located and the plane where the sound emitting surface is located is β, and 10°≤β≤20°.

[0012] In one embodiment, the capacitance detection device triggers the wearing signal with a set capacitance of C threshold , 0.0260PF≤C threshold ≤0.0357PF.

[0013] The utility model also proposes an earphone, which includes the ear shell component, the ear shell component includes a shell, a speaker and a capacitance detection device, the shell has an installation cavity, and a sound-emitting surface is formed on one side of the shell; the speaker is arranged in the installation cavity, and has a sound-emitting port arranged toward the sound-emitting surface, and a bottom end opposite to the sound-emitting port; the capacitance detection device has a capacitor plate, the capacitance detection device is arranged in the installation cavity, and the capacitor plate is located between the bottom end of the speaker and the sound-emitting surface.

[0014] In one embodiment, the earphone comprises a headset, and the headset comprises two ear shell components and a control device, and the control device is communicatively connected with the two capacitance detection devices of the two ear shell components.

[0015] The technical solution of the utility model adopts the method of arranging the capacitor plate between the bottom end of the speaker and the sound-emitting surface so that the distance between the capacitor plate and the human ear is smaller. Therefore, when the human ear enters the corresponding area and faces the capacitor plate, the capacitance generated is larger, and it is easier to detect the wearing relationship between the human ear and the ear shell component, thereby improving the accuracy of the ear shell component in detecting when the human ear is worn or detached. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A full cross-sectional view of an embodiment of an ear shell assembly provided by the utility model (the speaker portion is not cut away);

[0018] Figure 2 for Figure 1 A schematic diagram of the partial structure of the middle ear shell component;

[0019] Figure 3 for Figure 1 Schematic diagram of the partial structure of the middle ear shell component;

[0020] Figure 4 for Figure 1 Schematic diagram of the partial structure of the middle ear shell assembly.

[0021] Description of Figure Numbers:

[0022] 100. Ear shell assembly; 1. Shell; 11. Mounting cavity; 12. Sound-emitting surface; 2. Speaker; 21. Sound-emitting port; 22. Bottom end; 23. Top end; 24. Positioning column; 3. Capacitor detection device; 31. Capacitor plate; 311. First plate body; 312. Second plate body; 313. Third plate body; 314. Positioning hole.

[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0027] There are some defects in the single capacitive sensor solution used in the market to achieve wearing detection. For example, wearing the headphones on your head while walking, going up and down stairs, or riding in a car may be mistakenly identified as an ear-out error, and wearing off-center may cause the wearing to fail to be recognized. As a result, when users put on the headphones, the headphones will not automatically play and actively reduce noise, and the music playback will be mistakenly paused, the active noise reduction will disappear, and the call will be mistakenly switched back to the phone, which is a bad experience. The reason is that the ear shell component has low accuracy in detecting when the human ear is worn or detached.

[0028] The utility model provides an ear shell component.

[0029] See also Figure 1 In one embodiment of the utility model, the ear shell assembly 100 includes a shell 1, a speaker 2 and a capacitance detection device 3, the shell 1 has an installation cavity 11, and a sound-emitting surface 12 is formed on one side of the shell 1; the speaker 2 is arranged in the installation cavity 11, and has a sound-emitting port 21 arranged toward the sound-emitting surface 12, and a bottom end 22 opposite to the sound-emitting port 21; the capacitance detection device 3 has a capacitor plate 31, the capacitance detection device 3 is arranged in the installation cavity 11, and the capacitor plate 31 is located between the bottom end 22 of the speaker 2 and the sound-emitting surface 12.

[0030] In the technical solution of the utility model, a mounting cavity 11 is provided inside the shell 1, a sound-emitting surface 12 is formed on one side of the shell 1, a hole is provided on the corresponding mounting surface, the hole is connected to the mounting cavity 11, a speaker 2 is provided in the mounting cavity 11, and has a sound-emitting port 21 provided toward the sound-emitting surface 12, and the sound emitted by the sound-emitting port 21 enters the human ear through the hole, wherein when the ear shell assembly 100 is worn on the human ear, the human ear and the sound-emitting surface 12 are opposite. A capacitance detection device 3 is provided in the mounting cavity 11, and is used to generate capacitance when the human ear is close to determine the wearing relationship between the human ear and the ear shell assembly 100, and the capacitance detection device 3 includes a series of common capacitance sensors, and this embodiment adopts a flat capacitor plate 31 sensor, and the flat capacitor plate 31 sensor has a capacitance plate 31. In the prior art, the capacitor plate 31 is arranged at the bottom of the mounting cavity 11. When the human ear corresponds to the sound-emitting surface 12, a wearing capacitance is generated between the capacitor plate 31 and the human ear. When the wearing capacitance is greater than the set capacitance, it is determined that the human ear wears the ear shell component 100. When the wearing capacitance is less than the set capacitance, it is determined that the human ear is detached from the ear shell component 100. According to the capacitance calculation formula: C = εo × εr × S ÷ d, wherein εo is the dielectric constant in vacuum, εr is the relative dielectric constant of the material, S is the facing area between the capacitor plate 31 and the human ear, and d is the vertical distance between the capacitor plate 31 and the human ear. The utility model arranges the capacitor plate 31 between the bottom end 22 of the speaker 2 and the sound-emitting surface 12, which is equivalent to the method of arranging the capacitor plate 31 at the bottom of the mounting cavity 11 in the prior art, so that the distance between the capacitor plate 31 and the normal human ear when worn is shortened by at least half, so the capacitance generated during normal wearing is twice the capacitance generated by the setting method in the prior art (compared with the prior art, only the distance d is controlled), which is far more than the set capacitance. Therefore, when the ear is worn crooked (within a certain degree), the area S facing the capacitor plate 31 and the ear is reduced when the capacitor plate 31 is not facing the capacitor plate 31, which can also ensure that the capacitance generated when worn is greater than the set capacitance, so that the wearing state can be detected when the ear is crooked, and the accuracy of detection is improved. When the ear shell component 100 is vibrated, displaced, or the ear shell component 100 is fiddled with by hand, the area S facing the capacitor plate 31 and the ear is reduced, and the capacitance generated when worn can also be greater than the set capacitance. The accuracy of the ear shell component 100 when worn or detached from the ear is improved. In addition, since the area of ​​the capacitor plate 31 remains unchanged and the distance is shortened, the capacitance generated when worn is much greater than the set capacitance. At this time, it can also be considered to appropriately reduce the size of the capacitor plate 31, which can save manufacturing costs on the one hand, and reduce the volume of the ear shell component 100 on the other hand, making the ear shell component 100 lighter. After the area of ​​the capacitor plate 31 is reduced, when a person manually fiddles with the ear shell component 100 , it is less likely that interference capacitance will be generated between the person's hand and the capacitor plate 31 , thereby affecting the determination result of the wearing relationship between the ear shell component 100 and the human ear.It is worth mentioning that the distance between the capacitor plate 31 and the human ear during normal wear is reduced, and it is more difficult for a human hand to be located between the two, thereby avoiding changes in the relative dielectric constant εr of the material and enhancing the anti-interference ability of the human hand.

[0031] For the configuration of the capacitor plate 31, please refer to Figure 4 The capacitor plate 31 has a first plate 311, a second plate 312 and a third plate 313. The first plate 311 and the second plate 312 are arranged radially at intervals along the sound outlet 21 of the speaker 2, and the third plate 313 is used to fix the first plate 311 and the second plate 312. The purpose of setting multiple plates is to increase the surface area of ​​the capacitor plate 31 so that a larger capacitance can be generated when worn, thereby having a better detection effect. The first plate 311 and the second plate 312 are arranged radially at intervals along the sound outlet 21 of the speaker 2 to prevent the propagation of the sound waves emitted by the speaker 2 from being blocked. In one embodiment, the first plate 311 and the second plate 312 are both arranged as annular plates, and the second plate 312 is located inside the first plate 311. The third plate 313 mainly plays a connecting role, connecting the first plate 311 and the second plate 312, and will not occupy too much of the gap between the first plate 311 and the second plate 312.

[0032] In order to make the capacitance detection device 3 have a more accurate detection effect, the human ear corresponds to the sound-emitting surface 12 when worn, and in order to make the capacitor plate 31 correspond to the human ear, the capacitor plate 31 corresponds to the center of the sound-emitting surface 12, so that when the human ear is worn crookedly, most of the human ear also corresponds to the capacitor plate 31. In order to facilitate detection, it is necessary to limit the human ear to correspond to the central area of ​​the sound-emitting surface 12. The ear shell component 100 also includes an earmuff, and the earmuff includes an elliptical through hole inside. The center of the ellipse corresponds to the center of the sound-emitting surface 12. The elliptical through hole is similar to the shape of the human ear auricle, which can better limit the human ear, so that the human ear corresponds to the center of the sound-emitting surface 12, that is, the center of the capacitor plate 31, and enhance the capacitance detection effect. The thickness of the earmuff is about 20mm. The inner circle of the earmuff is 67mm long and 42mm wide; the outer circle of the earmuff is 100mm long and 80mm wide. The thickness of the earmuff is 20mm to obtain a sufficiently large sound cavity, so that the sound cavity will not change greatly after the user wears it (sound cavity volume - ear volume = effective sound cavity volume), thereby improving the consistency of sound effects and noise reduction effects experienced by different users. The length and width of the earmuff are ergonomically designed to meet the user's wearing comfort.

[0033] In order to ensure the design area of ​​the capacitor plate 31 and to further shorten the distance from the human ear, the capacitor plate 31 is arranged between the sound outlet 21 of the speaker 2 and the sound surface 12 to prevent the speaker 2 body from interfering with the design and installation of the capacitor plate 31.

[0034] In order to fix the capacitor plate 31 to prevent the capacitor position from changing, the capacitor plate 31 can be fixedly connected to the speaker 2. The speaker 2 has a top end 23 arranged opposite to the bottom end 22, and the capacitor plate 31 is installed on the top end 23. The bonding between the capacitor plate 31 and the speaker 2 is for the purpose of fixed connection and insulation. In order to better position the capacitor plate 31 when installing it, a positioning column 24 is provided at the top end 23 of the speaker 2, and a positioning hole is correspondingly provided at the first plate body 311. The positioning column 24 is limitedly matched with the positioning hole. (Please refer to Figure 4 )

[0035] Since the capacitor plate 31 is arranged between the sound outlet 21 of the speaker 2 and the sound surface 12, in order to prevent the capacitor plate 31 from blocking the propagation of the sound emitted by the speaker 2, the capacitor plate 31 is arranged at the periphery of the sound outlet 21 to avoid the propagation of the sound. In one embodiment, the capacitor plate 31 is arranged in a semicircular shape, and a recess is arranged at the center of the circle, and the recess corresponds to the sound outlet 21, so that the capacitor plate 31 is located at the periphery of the sound outlet 21. With this arrangement, the installation volume of the capacitor plate 31 is smaller. In another embodiment, the capacitor plate 31 can also be arranged in a ring shape, and the through hole in the center of the capacitor plate 31 corresponds to the sound outlet 21. This arrangement has a better detection effect with the human ear.

[0036] In order to enhance the detection effect of the capacitance detection device 3, the capacitor plate 31 is tilted, because the human ear is tilted relative to the side face, and the tilt angle is θ. For the "S" in the capacitance calculation formula, it is the area directly opposite to the human ear and the capacitor plate 31, so the actual capacitance also needs to be multiplied by cosθ, cosθ≤1. When the tilt plane of the human ear is parallel to the plane where the capacitor plate 31 is located, θ is equal to 0, cos0=1, and the detection effect is best in this state. Generally, 30°≤θ≤45°, when θ is not equal to 0°, the smaller the better. However, the human ear is an inherent feature of each user and cannot be changed, so the solution of the utility model changes the tilt angle of the capacitor plate 31 to make the capacitor plate 31 close to parallel to the human ear. The acute angle between the plane where the capacitor plate is located and the plane where the sound-emitting surface 12 is located is α. When α and θ are equal, the two are parallel. At this time, the actual capacitance needs to be multiplied by cos(θ-α). Considering the volume of the ear shell component 100, the tilt angle of the capacitor plate 31 cannot be consistent with that of the human ear, so 10°≤α≤20°. The capacitance detection effect is enhanced while ensuring the volume of the ear shell component 100.

[0037] In order to make the ear shell assembly 100 have a better listening effect, the speaker 2 is also tilted, and the angle between the plane where the sound outlet 21 is located and the plane where the sound surface 12 is located is β, so that the distance from each part of the sound-emitting part to the human ear is equal. In addition, in order to facilitate the installation and fixation of the capacitor plate 31, 10°≤β≤20° is set, so that α=β.

[0038] In the ear shell component 100, the capacitance detection device 3 triggers the wearing signal with a set capacitance of C threshold , 0.0260PF≤C threshold ≤0.0357PF, the maximum interference capacitance generated by human hand is C finger , C finger ≤0.0245PF; the minimum capacitance detected when the human ear corresponds to the capacitor plate 31 is C user-min , 0.0617PF≤C user-min ≤0.1509PF, the ear shell component 100 meets: C finger <C threshold <C user-min -C finger Among them, C finger <C threshold This is to prevent the ear shell assembly 100 from being misjudged when the ear is not worn; threshold <C user-min -C finger The purpose is to prevent the human ear from misjudging the wearing status when holding the ear shell assembly 100 when wearing it.

[0039] The following table shows the test data: (unit: PF)

[0040]

[0041] The present invention also proposes an earphone, which includes an ear shell component 100, the ear shell component 100 includes a shell 1, a speaker 2 and a capacitance detection device 3, the shell 1 has a mounting cavity 11, and a sound-emitting surface 12 is formed on one side of the shell 1; the speaker 2 is arranged in the mounting cavity 11, and has a sound-emitting port 21 arranged toward the sound-emitting surface 12, and a bottom end 22 opposite to the sound-emitting port 21; the capacitance detection device 3 has a capacitor plate 31, the capacitor detection device 3 is arranged in the mounting cavity 11, and the capacitor plate 31 is located between the bottom end 22 of the speaker 2 and the sound-emitting surface 12. The specific structure of the ear shell component 100 refers to the above embodiment. Since the earphone adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0042] In order to improve the accuracy of the wearing status of human ears, the earphones include headphones, and the headphones include two ear shell components 100 and a control device, and the control device is communicatively connected with the two capacitance detection devices 3 of the two ear shell components 100. The two ear shell components 100 correspond to two human ears respectively. Only when the two capacitance detection devices 3 simultaneously detect that the two human ears are in a detached state from the ear shell components 100, will it be determined that the human ears are detached from the earphones, and at this time, the low power consumption mode is turned on or the automatic shutdown is turned on. Therefore, when one side of the human ear is under pressure and the human hand fiddles with the ear shell component 100 on one side, the capacitance generated when one side is worn is greater than the set capacitance, and when the other side is detached from wearing, the capacitance is less than the set capacitance. At this time, it can also be accurately determined that the earphones are not completely detached from the human ear and are still in a wearing state. The accuracy of the earphones in detecting when they are worn or detached from the human ear is greatly improved.

[0043] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An ear shell component, characterized in that: include: A housing having a mounting cavity, wherein a sound-emitting surface is formed on one side of the housing; A speaker, arranged in the installation cavity, having a sound-emitting port arranged toward the sound-emitting surface, and a bottom end opposite to the sound-emitting port; A capacitance detection device, comprising a capacitance plate, wherein the capacitance detection device is disposed in the mounting cavity, and the capacitance plate is located between the bottom end of the speaker and the sound-emitting surface; The capacitor plate comprises a first plate body, a second plate body and a third plate body, the first plate body and the second plate body are radially spaced apart along the speaker sound outlet, and the third plate body is used to fix the first plate body and the second plate body in connection.

2. The ear shell assembly according to claim 1, characterized in that: The capacitor plate is arranged between the sound-emitting port of the speaker and the sound-emitting surface; the speaker has a top end arranged opposite to the bottom end, and the capacitor plate is installed on the top end.

3. The ear shell assembly according to claim 2, characterized in that: The top of the speaker is provided with a positioning column, and the first plate is correspondingly provided with a positioning hole. The positioning column and the positioning hole are limitedly matched, and the top of the speaker is glued to the first plate.

4. The ear shell assembly according to claim 2, characterized in that: The capacitor plate is arranged at the periphery of the sound-emitting opening.

5. The ear shell assembly according to claim 4, characterized in that: The capacitor plate is arranged around the outer periphery of the sound-emitting opening.

6. The ear shell assembly according to any one of claims 1 to 5, characterized in that: The acute angle between the plane where the capacitor plate is located and the plane where the sound-emitting surface is located is α, and 10°≤α≤20°.

7. The ear shell assembly according to claim 1, characterized in that: The angle between the plane where the sound outlet is located and the plane where the sound surface is located is β, and 10°≤β≤20°.

8. The ear shell assembly according to claim 1, characterized in that: The capacitance detection device triggers the wearing signal with a set capacitance of C threshold , 0.0260PF≤C threshold ≤0.0357PF.

9. A headset, characterized in that: The earphone comprises the ear shell assembly according to any one of claims 1 to 8.

10. The earphone according to claim 9, characterized in that The earphone comprises a head-mounted earphone, and the head-mounted earphone comprises two ear shell components and a control device, and the control device is communicatively connected with the two capacitance detection devices of the two ear shell components.

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