WO2021212702A1

WO2021212702A1 - Earphone

Info

Publication number: WO2021212702A1
Application number: PCT/CN2020/108981
Authority: WO
Inventors: 孙鑫; 芦涛
Original assignee: 万魔声学科技有限公司
Priority date: 2020-04-24
Filing date: 2020-08-13
Publication date: 2021-10-28
Also published as: CN113556638B; CN113556638A; CN215734748U

Abstract

Provided in embodiments of the present application are an earphone, comprising a first end housing, a main housing, and a second end housing that are sequentially connected in a first direction; the first end housing and the second end housing respectively cover openings of two ends of the main housing in the first direction; a voice nozzle is disposed on the first end housing; the main housing comprises a first curved surface, a second curved surface, a first contact surface, and a second contact surface that are connected to the second end housing; the first curved surface and the second curved surface are oppositely disposed in a second direction perpendicular to the first direction; the first contact surface and the second contact surface are respectively connected to two ends of the first curved surface facing the second curved surface; on a cross-section perpendicular to the first direction, the first contact surface, the first curved surface, and the second contact surface are a V-like shape; and in the direction from the first end housing to the second end housing, the second curved surface extends in a direction away from the first curved surface. The embodiments of the present application can effectively prevent the earphone from moving outside of the ear, ensuring wearing stability.

Description

earphone

Technical field

The present invention relates to the technical field of earphones, in particular to an earphone.

Background technique

With the popularization and application of electronic devices such as smart phones and tablet computers, earphones, as electronic accessories for various mobile terminals to receive and transmit audio, are constantly being updated. People are wearing earphones while pursuing better sound quality. Stability puts forward higher requirements.

In the prior art, for earphones of types such as True Wireless Stereo (TWS), when worn on the human ear, the friction force of the ear cap of the earphone is mainly fixed by the ear canal, and the presence of these earphones is usually relatively low. Many parts are located outside the ears. Under the influence of gravity, the earphones are easy to move toward the outside of the ears, and it is difficult to ensure the stability of wearing.

technical problem

The embodiment of the present invention provides an earphone to solve the problem that the earphone in the prior art is easy to move out of the ear and it is difficult to ensure the stability of wearing

Technical solutions

In order to solve the above technical problems, the present invention is implemented as follows:

The embodiment of the present invention provides an earphone, which includes a first end shell, a main shell, and a second end shell that are sequentially connected along a first direction, and the first end shell and the second end shell are respectively covered by Openings at both ends of the main housing along the first direction; a mouthpiece is provided on the first end housing;

The main housing includes a first curved surface, a second curved surface, a first contact surface, and a second contact surface connected to the second end shell, and the first curved surface and the second curved surface are perpendicular to the first surface. Relatively arranged in a second direction in one direction;

The first contact surface and the second contact surface are respectively connected to two ends of the first curved surface facing the second curved surface. In a cross section perpendicular to the first direction, the first contact surface , The first curved surface and the second contact surface are arranged in a nearly V shape;

In a direction along the first end shell to the second end shell, the second curved surface extends in a direction away from the first curved surface.

An embodiment of the present invention also provides an earphone, which includes a first end shell, a main shell, and a second end shell. The main shell includes a first end and a second end. The second end portion is respectively connected to the first end shell and the second end shell, and a mouthpiece is provided on the first end shell;

The first end includes a nearly circular surface, the second end includes a near V-shaped surface and a curved surface arranged opposite to the near V-shaped surface in the radial direction of the second end; the earphone In the wearing state, the near-circular surface falls into the inner ear socket, and the tip of the near-V-shaped surface points to the cutout between the screens; in the direction along the first end shell to the second end shell, The tip and the two sides of the tip are close to each other toward the radial inside of the main housing, and the two sides of the tip are covered by the tragus and the antitragus; the curved surface faces the The nearly circular surface extends to form an avoiding surface for avoiding the helix.

An embodiment of the present invention also provides an earphone, which includes a first end shell, a main shell, and a second end shell that are sequentially connected along a first direction; the first end shell includes a nearly circular portion, and the second end The housing includes a near-V-shaped part, and opposite ends of the main housing along the first direction respectively connect the near-circular part and the near-V-shaped part; the first end shell is provided with a mouthpiece;

The projection of the near-V-shaped portion on the first end shell along the first direction falls into the outer contour of the first end shell, and the main housing includes a portion included from the near-circular portion The edge of the arc-shaped end surface smoothly transitions to the transitional curved surface of the edge of the V-shaped end surface included in the near-V-shaped portion;

In the direction along the first end shell to the second end shell, the transition curved surface is closer to a first reference line, and the first reference line is parallel to the first direction and passes through the near The straight line at the center of the circular part;

The connecting end of the sound mouth is connected to the edge of the first end shell; in the vertical projection along the first direction, the free end of the sound mouth reaches outside the outer contour of the first end shell;

The extension direction of the connecting end to the free end is the extension direction of the normal at the turning point of any near-V-shaped cross section of the near-V-shaped part, in the vertical projection along the first direction. The included angle is 70 to 110 degrees.

Beneficial effect

The earphone provided by the embodiment of the present invention includes a first end shell, a main shell, and a second end shell that are sequentially connected in a first direction, wherein the first end shell is provided with a mouthpiece, which can be used for pronunciation and communication with people. The ear canal is fixed; the main housing includes a first contact surface and a second contact surface, which can respectively generate contact force with the tragus and antitragus of the human ear that can be used to prevent the earphone from falling off; the main housing also includes a second contact surface. A curved surface and a second curved surface, the first contact surface, the first curved surface, and the second contact surface are sequentially connected to form a nearly V-shaped structure, so that the first curved surface can effectively adapt to the cutout between the human ears; In the direction of the second end shell, the second curved surface extends in a direction away from the first curved surface. In this way, the vertical space can be fully utilized and the size requirement of the earphone in the first direction can be reduced. The earphone provided by the embodiment of the present invention, on the one hand, can generate a larger contact force with the human ear based on the mouthpiece, the first contact surface, and the second contact surface, and on the other hand, it can reduce the earphone's contact force. The size requirement in the first direction makes the overall center of gravity of the earphone lean toward the inside of the human ear, thereby effectively preventing the earphone from moving outside the ear and ensuring the stability of wearing.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the human ear auricle;

FIG. 2 is one of the three-dimensional structural schematic diagrams of the earphone provided by the embodiment of the present invention;

Figure 3 is a right side view of a headset provided by an embodiment of the present invention;

Figure 4 is a front view of a headset provided by an embodiment of the present invention;

Figure 5 is a left side view of a headset provided by an embodiment of the present invention;

6 is a schematic diagram of the positional relationship between the earphone and the human ear in the wearing state according to the embodiment of the present invention;

FIG. 7 is a schematic diagram of the earphone provided by the embodiment of the present invention in the lower position of the wearing state;

FIG. 8 is the second schematic diagram of the three-dimensional structure of the earphone provided by the embodiment of the present invention;

FIG. 9 is a schematic diagram of a structure of an electronic component in an embodiment of the present invention;

FIG. 10 is a schematic diagram of another structure of an electronic component in an embodiment of the present invention;

Figure 11 is a front view of a headset provided by another embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a headset in a wearing state according to another embodiment of the present invention;

FIG. 13 is a schematic diagram of the earphone provided by another embodiment of the present invention when the earphone is worn.

The figure shows: the first end shell 100, the mouthpiece 110, the connecting end 111, the free end 112, the main housing 200, the first curved surface 210, the second curved surface 220, the first sub-curved surface 221, the second sub-curved surface 222, The third sub-curved surface 223, the first contact surface 230, the second contact surface 240, the second end shell 300, the large diameter end 310, the small diameter end 320, the first microphone mounting portion 410, the second microphone mounting portion 420, and the electronic component 500 , Horn unit 510, moving iron speaker 511, moving coil horn 512, circuit board 520, battery 530, antenna 540, nearly circular surface 1210, nearly V-shaped surface 1220, tip 1221, curved surface 1230, and avoiding surface 1240.

Embodiments of the present invention

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help comprehensively understand the embodiments of the present invention. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. In addition, for clarity and conciseness, descriptions of known functions and configurations are omitted.

Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not mean a quantity limit, but mean that there is at least one.

Referring to Figure 1, in order to facilitate the description of the shape, structure and wearing mode of the earphone provided by the embodiment of the present invention, Figure 1 shows a schematic diagram of the structure of the human ear auricle. The tragus 12, the concha cavity 15, the antihelix 16, the helix 17 and the concha 18, wherein there is an interscreen cut 13 between the tragus 11 and the antitragus 12, and the helix 17 has a helix bottom 19 (or helix Foot), in the inner cavity of the auricle, the part below the bottom 19 of the helix forms the concha cavity 15, and the upper part of the bottom 19 of the helix forms the concha boat 18. The concha chamber 15 includes a bottomed inner ear socket 14, usually located On the inside of the tragus 12.

As shown in FIGS. 2 to 4, the earphone provided by the embodiment of the present invention includes a first end shell 100, a main shell 200, and a second end shell 300 that are sequentially connected along a first direction. The first end shell 100 and The second end housing 300 is respectively covered at the openings at both ends of the main housing 200 along the first direction; the first end housing 100 is provided with a mouthpiece 110;

The main housing 200 includes a first curved surface 210, a second curved surface 220, a first contact surface 230, and a second contact surface 240 connected to the second end shell 300. The curved surfaces 220 are arranged oppositely in a second direction perpendicular to the first direction;

The first contact surface 230 and the second contact surface 240 are respectively connected to two ends of the first curved surface 210 facing the second curved surface 220. In a cross section perpendicular to the first direction, the The first contact surface 230, the first curved surface 210, and the second contact surface 240 are arranged in a nearly V shape;

In the direction along the first end shell 100 to the second end shell 300, the second curved surface 220 extends in a direction away from the first curved surface 210.

It is easy to understand that the above-mentioned first end shell 100, main shell 200, and second end shell 300 can all be considered as protective shells of earphones. On the one hand, an accommodating space for installing other components can be formed inside. Therefore, through the design of the protective housing, the contact force and gravity distribution of the earphone with the human ear can be adjusted in the wearing state.

The letter H in FIG. 4 shows the corresponding extension direction of the first direction. For the convenience of subsequent description, the first direction here may not limit the specific direction. In simple terms, it can be considered as the extension direction of the overall height of the headset. , In the wearing state of the earphone, the first direction may correspond to the inner and outer extending direction of the human ear. As mentioned above, the first end shell 100 is provided with a mouthpiece 110. The mouthpiece 110 can be considered as a part that protrudes from the outer surface of the first end shell 100 and is used to emit sound. In the worn state, the mouthpiece 110 is usually Inserted into the ear canal, on the one hand, the sound can be transmitted to the human ear, on the other hand, there can be a certain friction between the mouthpiece 110 and the ear canal to prevent the earphone from slipping outward. Generally speaking, the mouthpiece 110 and the first end shell 100 can be regarded as the inner part of the earphone, and the second end shell 300 can be regarded as the outer part of the earphone.

In this embodiment, the specific connection between the above three protective shells can be set according to actual needs. For example, the first end shell 100 and the main shell 200 can be integrally formed, and the main shell 200 and the second end The shells 300 may be fixedly connected by gluing, snapping, etc.; or, the first end shell 100 and the main shell 200 are fixedly connected, and the main shell 200 and the second end shell 300 are integrally formed; and Alternatively, the first end housing 100 and the main housing 200, and the main housing 200 and the second end housing 300 may be fixedly connected, etc., which does not affect the overall assembly of the protective housing and the accommodating space. The assembly of the components is sufficient. In the same way, the first end shell 100 and the mouthpiece 110 may also be integrally formed or fixedly connected.

3 and 4, the main housing 200 may include a first curved surface 210, a second curved surface 220, a first contact surface 230, and a second contact surface 240. The above four surfaces can be regarded as the circumferential direction of the main housing 200. The part of the enclosed surface, the letter X in Figure 3 shows the specific extension direction of the second direction, which can be considered as the up and down direction in the figure, the first curved surface 210 is located at the lower position, and the second curved surface 220 is located at Upper position; on a cross-section perpendicular to the first direction, the first contact surface 230 and the second contact surface 240 are respectively located on the left and right sides of the first curved surface 210, and form a nearly V-shape with the first curved surface 210. When the earphone is in the wearing state, the first curved surface 210 can be in contact with the bottom of the concha cavity 15 to lift the earphone, and the first curved surface 210 can be considered as the lower width part of the above-mentioned nearly V-shaped structure. It helps to reach the cutout 13 between the screens; under normal circumstances, the first contact surface 230 can be in contact with the tragus 11, and the contact force between the two can be used to resist the earphone slipping, such as friction and/or elasticity In the same way, the second contact surface 240 can be in contact with the tragus 12, and a corresponding contact force can also be generated between the two.

It is worth noting that the near-V shape defined here can refer to a curve similar to a parabola with a V-shaped turn, or it can refer to a shape obtained by rounding the sharp corners of a conventional V shape, which is not done here. The specific limitation can help make the earphone better adapt to the cutout 13 between the screens in the conventional human ear structure.

In addition, the first contact surface 230 and the second contact surface 240 may only refer to the structural surface of the main housing 200 that is close to or connected to the second end housing 300, and the purpose is to form a nearly V-shaped structure at the cutout 13 between the screens; The first contact surface 230 and the second contact surface 240 may be connected to the first end shell 100 through other integrally formed structural surfaces. In other words, the part of the main shell 200 close to the first end shell 100 may have a The V-shaped structural surface can also be round or nearly round as a whole.

In this embodiment, the way in which the second curved surface 220 extends in the direction from the first end housing 100 to the second end housing 300 is also defined. It is worth noting that the second curved surface 220 defined here faces away from The direction of the extension of the first curved surface 210 is not limited to the increase or decrease of the distance between the first curved surface 210 and the second curved surface 220 at a certain position along the first direction, but refers to the second curved surface. The whole 220 is curved relative to the first direction; as reflected in FIG. 4, it can be considered that in the direction from left to right (or from inside to outside), the second curved surface 220 is curved upward. In this way, on the one hand, it provides a structural foundation for the earphones to avoid the helix 16 and the helix 17, on the other hand, it can make full use of the vertical space at the ear concha 18 to hold the earphones. In other words, the capacity of the earphones The installation space can expand the space vertically to meet the installation requirements of internal components, instead of expanding the space horizontally, which can reduce the size requirement of the headset in the first direction and help make the headset overall in the wearing state. The center of gravity shifts to the inside of the human ear.

The earphone provided by the embodiment of the present invention includes a first end shell 100, a main shell 200, and a second end shell 300 that are sequentially connected in a first direction, wherein the first end shell 100 is provided with a mouthpiece 110, which can be used Used for pronunciation and fixed with the ear canal of the human ear; the main housing includes a first contact surface 230 and a second contact surface 240, which can respectively interact with the tragus 11 and the antitragus 12 of the human ear to prevent the earphone from falling off. Contact force; the main housing also includes a first curved surface 210 and a second curved surface 220, the first contact surface 230, the first curved surface 210 and the second contact surface 240 are connected in turn to form a nearly V-shaped structure, so that the first curved surface 210 can The cutout 13 between the screens effectively adapts to the human ear; in the direction along the first end shell 100 to the second end shell 300, the second curved surface 220 extends in a direction away from the first curved surface 210, so that the vertical space can be fully utilized, Reduce the size requirements of the headset in the first direction. The earphone provided by the embodiment of the present invention, on the one hand, can generate a large contact force with the human ear based on the mouthpiece 110, the first contact surface 230, and the second contact surface 240 to prevent the earphone from falling off. On the other hand, it can The size requirement of the earphone in the first direction is reduced, so that the overall center of gravity of the earphone is leaning to the inside of the human ear, thereby effectively preventing the earphone from moving outside the ear and ensuring the stability of wearing.

Optionally, in a direction along the first end shell 100 to the second end shell 300, the first curved surface 210 extends toward a direction close to the second curved surface 220, and the first contact surface 230 The second contact surface 240 is close to each other.

Similar to the previous embodiment, the first curved surface 210 defined in this embodiment extends in a direction close to the second curved surface 220, and it is not limited to a position along the first direction. The distance between the curved surfaces 220 has increased or decreased; as shown in FIG. 4, combined with the extension of the second curved surface 220 described above, the main housing 200 is bent upward at the end connected to the second end shell 300 as a whole.

At the same time, in this embodiment, in the direction along the first end housing 100 to the second end housing 200, the first contact surface 230 and the second contact surface 240 are close to each other; as shown in FIG. 3, specifically, There is approximately a symmetry plane between the first contact surface 230 and the second contact surface 240, which crosses the X line in the figure and is perpendicular to the paper, in the direction along the first end shell 100 to the second end shell 200, The first contact surface 230 and the second contact surface 240 approach the symmetry plane, thereby forming a mutually close structure. Combining the first curved surface 210, the first contact surface 230, and the second contact surface 240, it can be seen that the main housing 200 is located at the lower part of FIG.

With the above arrangement, in the projection along the direction from the second end shell 200 to the first end shell 100, there are exposed parts of the first contact surface 230 and the second contact surface 240, and the exposed part can reach the earphone in the wearing state. Bottom inner ear socket 14 in.

That is to say, when the earphone is worn, there is a contact surface between the tragus 11 and the countertragus 12 and the earphone that is inclined relative to the horizontal plane, and the force generated on the earphone is not only the first direction perpendicular to the first direction. The force component, there will also be a larger second component force parallel to the first direction. The first component force can generate friction to prevent the earphone from sliding down, and the second force component can be directly used to prevent the earphone from sliding down. Further enhance the stability of the headset when wearing.

Optionally, the second curved surface 220 includes a first sub-curved surface 221, a second sub-curved surface 222, and a third sub-curved surface 223 that are smoothly transitioned and connected in sequence;

On the longitudinal section of the main housing 200 parallel to the first direction and the second direction, the angle between the extension direction of the outer contour line of the second sub-curved surface 222 and the first direction is greater than The angle between the extension direction of the outer contour line of the first sub-curved surface 221 and the first direction is greater than the angle between the extension direction of the outer contour line of the third sub-curved surface 223 and the first direction.

The longitudinal section of the main housing 200 parallel to the first direction and the second direction can be regarded as a section perpendicular to the plane of the paper through the X line in FIG. 3. As shown above, in the direction along the first end cover 100 to the second end cover 300, the second curved surface 220 extends away from the first curved surface 210. As reflected in FIG. 4, the outer contour of the second curved surface 220 is at The shape that extends upward as a whole. Also referring to FIG. 4, in this figure, the outer contour of the second curved surface 220 has a roughly cubic curve structure, that is, the speed at which the second curved surface 220 moves away from the first curved surface 210, or the slope relative to the first direction changes. Wherein, the speed of the second sub-curved surface 222 away from the first curved surface 210 (or the slope relative to the first direction) is greater than the other two sub-curved surfaces.

Specifically, when the headset is worn, the first sub-curved surface 221 is relatively gentle to adapt to changes in the ear canal; while the second sub-curved surface 222 quickly stretches upwards while avoiding the antihelix 16 and the helix 17, so as to make the main shell The body 200 forms a larger accommodating space as close as possible to the human ear, so that the overall center of gravity of the earphone is as close as possible to the inner side of the human ear; in addition, the third sub-curved surface 223 is also relatively gentle to make a smooth transition with the second end shell 300 , To ensure the smoothness of the overall shape of the headset.

Feasibly, in a vertical projection along the first direction, the second end shell 300 is in the shape of a drop, and the second end shell 300 has a large diameter end 310 and a small diameter end arranged opposite to each other in the second direction. 320, and the extending direction of the long axis of the second end shell 300 is consistent with the second direction;

The first curved surface 210 and the second curved surface 220 smoothly transition to the small-diameter end 320 and the large-diameter end 310, respectively.

It is easy to understand that the above-mentioned drop shape, or can be described as a fusiform, has a large diameter end 310 with a larger bending radius (or a smaller curvature), and a smaller diameter end 310 with a smaller bending radius (or a larger curvature). End 320; for the long axis of the drop shape, it can refer to the axis corresponding to the longest line in the line between any two points in the outer contour.

As shown in FIG. 3, in this embodiment, the extending direction of the long axis is consistent with the second direction, and the large-diameter end 310 and the small-diameter end 320 are respectively arranged at opposite ends of the extending direction of the long-axis. Among them, the large-diameter end 310 and the second The two curved surfaces 220 are smoothly transitioned and connected, and the small-diameter end 320 is smoothly transitioned and connected to the first curved surface 210; in this way, on the one hand, it can be adapted to the first curved surface 210 with a smaller width to reach the cutout 13 between the screens. A larger section radius is formed on one side of the curved surface 220 to ensure that a larger installation space is formed on the inner side.

Optionally, a first microphone mounting portion 410 and a second microphone mounting portion 420 are provided on the main housing 200 and/or the second end housing 300;

In the vertical projection along the first direction, the first microphone mounting portion 410 and the second microphone mounting portion 420 are both located on a straight line corresponding to the long axis.

As shown in FIG. 3, in a preferred embodiment, the first microphone mounting portion 410 is disposed on the second end housing 300, and the second microphone mounting portion 420 is disposed on the main housing 200; of course; The specific locations of the first microphone mounting portion 410 and the second microphone mounting portion 420 can be selected according to actual needs.

In this embodiment, a plurality of microphone installation parts including the first microphone installation part 410 and the second microphone installation part 420 are provided, so that the sound can be picked up by a corresponding number of microphones to achieve the noise reduction function; at the same time, to ensure noise reduction As a result, the first microphone mounting part 410 and the second microphone mounting part 420 need to have a certain distance, and the two microphone mounting parts are arranged on the line corresponding to the long axis to ensure that there is enough space between the corresponding two microphones. spacing.

Optionally, in a vertical projection along the first direction, the first end shell 100 is circular or nearly circular, and the length of the long axis of the second end shell 300 is greater than that of the first end shell The length of the longest minor axis of the second end shell 300 is smaller than the diameter of the first end shell 100; and the projection of the small diameter end 320 is located within the outer contour of the first end shell 100, The projection of the large diameter end 310 is located outside the outer contour of the first end shell 100.

In this embodiment, as shown in FIG. 5, the first end shell 100 has a circular or nearly circular structure, and the second end shell 300 has a drop-shaped structure. The cross-sectional shape of the main shell 200 can be considered to be along the first The direction transitions from a circular or nearly circular shape to a drop shape. At the same time, referring to FIG. 4, the second end shell 300 is at a higher position relative to the first end shell 100, so that the shape of the earphone is more in line with the shape of the concha cavity 15 , Reduce the deformation of the tragus 11 being supported by the earphone, and reduce the pain of wearing the earphone for a long time.

It is easy to understand that since the shape of the water droplet does not have a specific short axis concept, the longest short axis mentioned here may refer to the axis perpendicular to the long axis with the longest length. For a nearly circular shape, it can be considered to be a circular shape as a whole, and it may substantially have a shape such as a slight ellipse, a slight convexity, and the like. In this embodiment, by designing the long axis and the short axis of the second end shell 300, the second end shell 300 can smoothly transition with the near V-shaped part of the main housing 200; in addition, it can also make the earphone The overall appearance of a structure with a large inside and a small outside helps the earphone's overall center of gravity fall into the concha cavity 15, thereby effectively preventing the earphone from slipping off the human ear while being worn.

In an application scenario, the circumference of the circular or nearly circular outer contour of the first end shell 100 may be between 50 and 60 mm.

6 and 7 are schematic diagrams of the headset in the wearing state. It can be seen from the figure that the extension direction of the long axis of the second end shell 300 (corresponding to the second direction X) is not a vertical direction, but a relative There is a certain inclination in the vertical direction, and the first contact surface 230 is higher than the second contact surface 240; specifically, through this inclination, the above-mentioned long axis extension direction can be directed to the position of the human mouth, and Since the two microphone installation parts are located on the straight line corresponding to the long axis, it is helpful for the two microphones to better pick up the sound emitted by the user and ensure a good noise reduction function.

In one example, the second microphone mounting portion 420 is located on the first curved surface 210 of the main housing 200 so as to be as close as possible to the human mouth; in order to prevent the second microphone mounting portion 420 from being blocked by the tragus 11 or the tragus 12, the corresponding In the case that the microphone cannot effectively pick up sound, set the position of the second microphone mounting portion 420 to the upper or outer side of the tragus 11.

In some feasible embodiments, in the first direction, the longest distance between the first end shell 100 and the second end shell 200 may be between 12 and 20 mm. In addition, the distance between the first microphone mounting portion 410 and the second microphone mounting portion 420 is greater than 18 mm, and the long axis of the drop-shaped second end shell 300 can be designed to meet the length separation requirement. Through the design of the position of the second microphone mounting portion 420, the distance between the second microphone mounting portion 420 and the tragus 11 is between 3~6mm when the headset is in the wearing state. At the same time, the second microphone mounting portion 420 reaches The vertical distance of the outer surface of the first end shell 100 is greater than 8 mm to ensure that the microphone at the second microphone mounting portion 420 is not blocked by the tragus 11.

Optionally, the connecting end 111 of the mouthpiece 110 is connected to the edge of the first end shell 100, and the mouthpiece 110 extends in a third direction, and on a vertical projection along the first direction, The free end 112 of the mouthpiece 110 reaches outside the outer contour of the first end shell 100; wherein there is a clip between the third direction and the second direction on the vertical projection along the first direction. Horn.

5 and 8, in this embodiment, the connecting end 111 of the mouthpiece 110 is connected to the edge of the first end shell 100, and the free end 112 of the mouthpiece 110 does not extend purely in the first direction. It will also extend outward along the radial direction of the first end shell 100, and make the mouthpiece 110 as a whole at the edge of the first end shell 110 outward, so as to make room for other components inside the first end shell 100 .

At the same time, in the vertical projection along the first direction, the projection in the extension direction of the mouthpiece 110 (that is, the projection in the third direction, corresponding to the letter Y) has an angle with the second direction.

With reference to FIG. 7, in an example, the angle between the second direction and the third direction on the vertical projection along the first direction may be between 70 and 110 degrees. For example, in the above projection, this The two directions can be perpendicular to each other. The free end 112 of the mouthpiece 110 is located on the side of the first contact surface 230. When the earphone is in the wearing state, if the vertical diameter of the first end shell 100 is taken as the dividing line, the first curved surface 210 of the main housing 200 , That is, the tip of the near V-shaped part and the protruding position of the mouthpiece 100 are located on the same side of the boundary line; in addition, the protruding position of the mouthpiece 110 is located at the lower edge of the top of the first end shell 100, and diagonally upward Extend to adapt to the structure of the ear canal of the human ear and improve the wearing comfort of the headset.

Optionally, the headset further includes an electronic component 500, which includes a horn unit 510, a circuit board 520, a battery 530, and an antenna 540;

The horn unit 510 is matched and installed with the mouthpiece 110, and the circuit board 520, the battery 530, and the antenna 540 are sequentially installed in the direction from the first end housing 100 to the second end housing 300. The first end shell 100, the main housing 200, and the second end shell 300 surround an accommodating space.

As shown in Figures 9 and 10, the horn unit 510 and the mouthpiece 110 are matched and installed, which mainly means that the installation positions between the horn unit 510 and the mouthpiece 110 are close, so that the mouthpiece 110 can respond to the sound generated by the horn unit 510. Conduct conduction; since the mouthpiece 110 is integrally installed on the edge of the first end shell 100 facing outwards, the installation position of the horn unit 510 is relatively at the edge position, so that enough other components are freed up in the first end shell 100. In this embodiment, the first end shell 100 and the main housing 200 close to the inner side are used to install the circuit board 520 and battery 530 with heavier weight, while the second end shell 300 close to the outer side is used to install the smaller mass The antenna 540 makes the overall center of gravity of the earphone closer to the inner side of the earphone.

Of course, the specific positions of each component in the electronic assembly 500 can be arranged according to actual needs, so that the relatively heavy component is located inside the earphone.

In an example, as shown in FIG. 9, the above-mentioned horn unit 510 may be a moving iron speaker 511. The moving iron speaker 511 may partially extend into the mouthpiece 110, and the other part may be installed in the first end shell 100, thereby reducing The overall length of the mouthpiece 110 is reduced, the ear depth of the mouthpiece 110 is reduced, and the wearing comfort is improved.

For example, for a conventional earphone using a moving iron speaker, the moving iron speaker will all enter the mouthpiece 110, and the length of the mouthpiece 110 is basically the same as the length of the moving iron speaker. In this example, the length of the mouthpiece 110 is only the conventional earphone. About 2/3, such as less than 6mm.

In another example, as shown in FIG. 10, the aforementioned speaker unit 510 may be a dynamic speaker 512.

For example, the horn unit 510 may be a moving coil horn with a diameter of 7mm or less. The moving coil horn 512 is installed in the protruding part of the first end shell 100, and the first end is vacant at a position close to the connecting end 111 of the mouthpiece 110 The internal space of the main body of the case 100 is used to place the circuit board 520 and the like. The circuit board 520 here may be a printed circuit board (Printed Circuit Board). Board Assembly, PCBA), etc., can be selected according to actual needs.

Referring to Figure 1, Figure 11 and Figure 12, an embodiment of the present invention also provides a headset, including a first end shell 100, a main shell 200 and a second end shell 300, the main shell 200 includes a first end And the second end, the first end and the second end are respectively connected to the first end shell 100 and the second end shell 300, and the first end shell 100 is provided with a mouthpiece 110 ；

The first end includes a nearly circular surface 1210, and the second end includes a nearly V-shaped surface 1220 and a curved surface 1230 arranged opposite to the nearly V-shaped surface 1220 in the radial direction of the second end. In the wearing state of the headset, the nearly circular surface 1210 falls into the inner ear socket, and the tip 1221 of the nearly V-shaped surface 1220 points to the interscreen cutout; in the first end shell 100 to the In the direction of the second end shell 300, the tip 1221 and the side surfaces of the tip 1221 are close to each other toward the radial inside of the main housing 200, and the two sides of the tip 1221 are tragus and opposed to each other. Covered by the tragus.

In this embodiment, the above-mentioned nearly circular surface 1210 mainly means that the cross section of the first end is nearly circular or circular. It is easy to understand that the first end shell 100 can cover the first end of the main shell 200 At the opening at the end, a smooth transition between the first end shell 100 and the main housing 200 also makes the first end shell 100 as a whole also nearly circular or semicircular. Similarly, the near-V-shaped surface of the second end can be understood as the cross-section of the second end has a near-V-shaped surface. For the curved surface 1230, it may be the same as the near-V-shaped surface 1220 at the second end. The two surfaces are arranged opposite to each other in the radial direction, as reflected in FIG. 11, the two surfaces may be arranged opposite to each other up and down; for the second end shell 300, there may also be a smooth transition connection with the second end.

For the nearly circular surface 1210, the bottom can fall into the inner ear socket 14 as shown in FIG. The tip 1221 of the near-V-shaped surface 1220 points to the cutout 13 between the screens, so that the sides located on both sides of the tip 1221 can fully contact the tragus 11 and the antitragus 12; at the same time, along the first end shell In the direction from 100 to the second end shell 300, the tip 1221 and the side surfaces of the tip 1221 are close to each other toward the radial inside of the main housing 200, so that the earphone can be tragus in the wearing state. 11 and the tragus 12 are wrapped, thereby increasing the resistance of the human ear to the outward movement of the earphone, and improving the stability of wearing the earphone.

Optionally, the curved surface 1230 extends toward the nearly circular surface 1210 to form an avoiding surface 1240 that avoids the helix.

Referring to Fig. 11, in the process of extending the upper end surface of the earphone, there is a tortuous part. On the one hand, the avoidance surface 1240 corresponding to the tortuous part can avoid the helix 16; The up and down height form of the second end replaces the form of increasing the length of the main housing 200 to meet the needs of the internal assembly space of the earphone, thereby helping the center of gravity of the earphone move to the inside of the ear, thereby effectively preventing the earphone from moving outside the ear , To ensure the stability of wearing.

Optionally, the second end shell 300 has a drop shape, and the extension direction of the long axis of the drop-shaped second end shell 300 is the same as the normal line of the tip 1221 on the second end shell 300. The vertical projection extends in the same direction.

In this embodiment, the extension direction of the long axis (corresponding to LR in FIG. 12) of the drop-shaped second end shell 300 is defined. Specifically, when the headset is worn, the long axis LR will point to the cutout 13 between the screens, which is helpful Therefore, the second end shell 300 is used for a sufficient length to meet the installation requirements of the electronic components in the earphone.

Optionally, the main housing 200 and/or the second end housing 300 are provided with a first microphone mounting portion 410 and a second microphone mounting portion 420; the first microphone mounting portion 410 and the second microphone mounting portion 410 The vertical projections of the microphone mounting portion 420 on the second end shell 300 are all located on the straight line corresponding to the long axis.

In this embodiment, the position and installation relationship of the two microphone mounting parts are defined, and the two are located on the straight line corresponding to the long axis LR, which can be adapted to the installation of dual microphones; at the same time, as described above, the long axis LR corresponds to The straight line points to the cutout 13 between the screens. In practical applications, the straight line corresponding to the long axis LR extends approximately towards the position of the human mouth. This helps the two microphones to better pick up the sound from the user and ensure good soundness. The noise reduction function.

In an example, the length of the aforementioned long axis is greater than the maximum diameter of the nearly circular surface 1210, so as to effectively ensure the installation distance between the two microphones.

Optionally, the mouthpiece 110 includes a free end 112 and a connecting end 111 connected to the edge of the first end shell 100; the vertical projection of the free end 112 on the first end shell 100 is located in the first end shell 100. One end is outside the outer contour of the shell 100.

In this embodiment, the mouthpiece 110 can be considered to be inclined with respect to the first end shell 100, and at the same time its free end 112 reaches the radial outer side of the outer contour of the first end shell 100, which helps to produce the sound mouth The installation effect of moving the 110 outwards can free up space for other components, such as the moving iron speakers mentioned above. Optionally, when the headset is in the wearing state, the connection between the highest point and the lowest point of the headset constitutes a first connection, and in a vertical projection toward the first end shell 100, the free end 112 is connected to the The tip 1221 is located on the same side of the first connecting line.

12, the above-mentioned first connection is identified as HL in the figure. It can be seen from the figure that when the earphone is in the wearing state, the free end 112 and the tip 1221 are located on the same side of the first connection HL to adapt to the ears of the human ear. The relative position and extension of the cutout 13 between the channel and the screen improve the wearing comfort of the headset.

It is worth emphasizing that the highest point and lowest point of the headset in the wearing state described here are limited for regular wearing situations, such as the wearing scene with the head of a regular user in an upright state, which is mainly used to reflect freedom The end 112 and the tip 1221 are designed to match the structure of the human ear.

In an example, in the wearing state of the headset, the distance between the first support point and the second support point is greater than the distance between the first support point and the center of gravity of the headset; wherein, the first The supporting point is an equivalent supporting point between the earphone and the ear canal, and the second supporting point is an equivalent supporting point between the earphone and the tragus, or between the earphone and the countertragus.

As shown in Figure 13, in an application scenario, when the earphone in this example is worn on the human ear, one end of the earphone (usually the mouthpiece) is inserted into the ear canal and slightly upturned, and the earphone is inserted into the ear canal and the ear There is an internal support point O between the roads, which corresponds to the above-mentioned first support point. The overall center of gravity of the headset is located at the position shown by G in the figure. Point A can be the equivalent supporting point of the tragus 11 to the earphone, and point B can be the equivalent supporting point of the tragus 12 to the earphone, that is, corresponding to the above-mentioned second supporting point; Take the equivalent support point A as an example.

The equivalent supporting point A forms an upward lifting force F1 for the earphone. At the center of gravity G, the earphone itself forms a downward gravity F2. The distance L1 between the distance between the internal support point O and the equivalent support point A is not less than the distance L2 between the internal support point O and the overall center of gravity G of the earphone. That is, the length L1 of the force arm of the lifting force F1 ≥ the length L2 of the force arm of the gravity F2. For example, in the process of designing the earphone, the vertical distance between the contact point of the earphone and the tragus 11 (or the antitragus 12) of the conventional human ear to the inner end shell of the earphone is about 7mm, so that the earphone The vertical distance from the center of gravity to the inner end shell of the earphone is less than 7mm; of course, the actual size may be adjusted according to the needs of different ear sizes.

In this way, under normal wearing conditions, the gravity of the earphone will not form a force that causes the earphone to fall outward, and the wearing stability of the earphone is relatively high. It is easy to understand that under normal circumstances, if the center of gravity G of the earphone does not exceed the position of the equivalent support point A, it can ensure that the earphone will not move out. For the same user, L1 remains unchanged, and the center of gravity G of the earphone is closer to the internal support Point O, that is, the shorter the L2, the better the wearing stability of the headset.

Optionally, the earphone includes a first part and a second part. When the earphone is worn, the first part is located on a side of the second supporting point close to the first supporting point, and the second The part is located on a side of the second support point away from the first support point, the volume of the first part is greater than the volume of the second part, and the center of gravity of the earphone is located in the first part.

In the wearing state of the earphone, the above-mentioned first part may refer to the inner part of the earphone at the second support point (corresponding to the above-mentioned equivalent support point A or equivalent support point B), which may be referred to as the support body; the above-mentioned second part may refer to The part of the earphone located outside the second support point can be called an exposed body. By making the volume of the first part larger than the volume of the second part, or rationally arranging the internal electronic components of the earphone, the overall center of gravity of the earphone can be located in the first part In order to ensure the stability of the headset when wearing.

An embodiment of the present invention also provides an earphone, which includes a first end shell 100, a main shell 200, and a second end shell 300 that are sequentially connected along a first direction; the first end shell 100 includes a nearly circular portion, so The second end shell 300 includes a near-V-shaped portion, and opposite ends of the main housing 200 along the first direction are respectively connected to the near-circular portion and the near-V-shaped portion; the first end shell A sound mouth 110 is provided on the 100;

The projection of the near-V-shaped portion on the first end shell 100 along the first direction falls into the outer contour of the first end shell 100, and the main housing 200 includes the near-circular shape. The arc-shaped end surface edge included in the portion smoothly transitions to the transition curved surface of the near-V-shaped end surface edge included in the near-V-shaped portion;

In the direction along the first end shell 100 to the second end shell 300, the transitional curved surface is closer to a first reference line, and the first reference line is parallel to the first direction. The straight line near the center of the circular part;

The connecting end 111 of the mouthpiece 110 is connected to the edge of the first end shell 100; in the vertical projection along the first direction, the free end 112 of the mouthpiece 110 reaches the first end shell 100 Outside the outline of

The extension direction from the connecting end 111 to the free end 112 is perpendicular to the extension direction of the normal at the turning point of any near-V-shaped cross-section of the near-V-shaped portion. The angle on the projection is 70 to 110 degrees.

Similar to the above embodiments, the first direction mainly refers to the overall height extension direction of the earphone or the inner and outer directions of the earphone when the earphone is worn; in some feasible application scenarios, the first direction can refer to the near-circular part. The extension direction of the normal of the circular end face.

The nearly V-shaped portion included in the second end shell 300 may be in the lower half of the second end shell 300 shown in FIG. 3, which has a nearly V-shaped end surface; It can be formed by connecting several arc-shaped end surfaces in sequence; one end of the transition surface is connected to the edge of the near-V-shaped end surface, and the other end is connected to the edge of a certain arc-shaped end surface of the near-circular end surface. Specifically, it can also be regarded as the first The one-end shell 100 has an arc-shaped end surface at the lower part when viewed downward as shown in FIG. 3.

For the center of the near-circular part, it can be regarded as the center of gravity of the near-circular part or its vicinity, or it can be regarded as being located within the outer contour of the cross-section of the near-circular part, and the distance to each point on the outer contour exceeds a certain distance. Any point of a threshold is not specifically limited here; the concept of the center of the near-circular part is drawn mainly to illustrate that along the direction of the first end shell 100 to the second end shell 300, there is an inward transitional surface. The tendency to shrink further forms a part that contacts the tragus 11 or the tragus 12 on the transition curved surface.

The projection of the near-V-shaped portion on the first end shell 100 along the first direction falls into the outer contour of the first end shell 100. In this way, in conjunction with FIG. 4, the transition curve smoothly transitions along the edge of the arc-shaped end surface In the process of reaching the edge of the V-shaped end surface, there will be a part that is folded inward along the radial direction of the main housing 200. During the wearing process, the part that is folded inward of the transition curve can be wrapped by the tragus 11 and the tragus 12 Cover, thereby increasing the resistance of the human ear to the outward movement of the earphone, and improving the stability of the earphone. At the same time, when wearing, the cross section of the part of the transition surface located on the relatively outer side gradually changes into a nearly V shape, which can match the screen of the human ear. The inter-cut 13 is adapted to improve the wearing comfort.

In addition, in this embodiment, the extension trend of the transition surface is specifically defined, that is, along the direction from the first end shell 100 to the second end shell 300, the points on the cross section of the transition surface monotonously converge toward the first reference line, so that When the earphones are worn on the ears of different groups of people, it is effectively ensured that there will be parts on the transition curved surface that are in contact with the tragus 11 or the tragus 12, which improves the application range of the earphones. The mouthpiece 110 is positioned outward from the edge of the first end shell 110 as a whole, so that space can be vacated inside the first end shell 100 for other components. In the vertical projection along the first direction, the angle between the direction line of the protruding position of the mouthpiece 110 and the long axis of the V-shaped portion may be between 70 and 110 degrees, for example, 90 degrees. With reference to Figure 7, through the above arrangement, the protruding position of the mouthpiece 110 can be located at the lower edge of the top of the first end shell 100, and protrude obliquely upwards to adapt to the structure of the ear canal of the human ear and improve the wearing comfort of the headset Spend.

In an example, any near-V-shaped cross-section of the near-V-shaped part is symmetrical with respect to the normal at the turning point of the any near-V-shaped cross-section.

In one example, the second end shell 300 has a drop shape, and the extension direction of the long axis of the drop shape is in line with the normal line at the turning point of any near-V-shaped cross section of the near-V-shaped part. The extension direction is the same.

Through the above-mentioned design of the shape of the second end shell 300, on the one hand, the structure of the human ear can be adapted to improve wearing comfort, and on the other hand, it can also help reduce the overall processing difficulty of the earphone.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that it can still implement the foregoing The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in Within the scope of protection of this application.

Claims

An earphone, which is characterized in that it comprises a first end shell, a main shell and a second end shell which are sequentially connected along a first direction, the first end shell and the second end shell respectively covering the main Openings at both ends of the housing along the first direction; a mouthpiece is provided on the first end housing;

The main housing includes a first curved surface, a second curved surface, a first contact surface, and a second contact surface connected to the second end shell, and the first curved surface and the second curved surface are perpendicular to the first surface. Relatively arranged in a second direction in one direction;

The first contact surface and the second contact surface are respectively connected to two ends of the first curved surface facing the second curved surface. In a cross section perpendicular to the first direction, the first contact surface , The first curved surface and the second contact surface are arranged in a nearly V shape;

In a direction along the first end shell to the second end shell, the second curved surface extends in a direction away from the first curved surface.
The earphone according to claim 1, wherein in a direction from the first end shell to the second end shell, the first curved surface extends in a direction close to the second curved surface, and the The first contact surface and the second contact surface are close to each other.
The earphone according to claim 1, wherein the second curved surface comprises a first sub-curved surface, a second sub-curved surface, and a third sub-curved surface that are successively and smoothly transitioned;

On the longitudinal section of the main housing parallel to the first direction and the second direction, the angle between the extension direction of the outer contour line of the second sub-curved surface and the first direction is greater than that of the The included angle of the extension direction of the outer contour line of the first sub-curved surface relative to the first direction is greater than the included angle of the extension direction of the outer contour line of the third sub-curved surface relative to the first direction.
The earphone according to any one of claims 1 to 3, wherein in the vertical projection along the first direction, the second end shell has a drop shape, and the second end shell has an edge The large-diameter end and the small-diameter end arranged oppositely in the second direction, and the extending direction of the long axis of the second end shell is consistent with the second direction;

The first curved surface and the second curved surface smoothly transition to the small diameter end and the large diameter end, respectively.
The headset according to claim 4, wherein the main housing and/or the second end shell are provided with a first microphone mounting portion and a second microphone mounting portion;

In the vertical projection along the first direction, the first microphone mounting portion and the second microphone mounting portion are both located on a straight line corresponding to the long axis.
The earphone according to claim 4, wherein in the vertical projection along the first direction, the first end shell is circular or nearly circular, and the length of the long axis of the second end shell is Greater than the diameter of the first end shell, the length of the longest minor axis of the second end shell is smaller than the diameter of the first end shell; and the projection of the small diameter end is located within the outer contour of the first end shell , The projection of the large diameter end is located outside the outer contour of the first end shell.
The earphone according to claim 6, characterized in that, in the vertical projection along the first direction, the circumference of the outer contour of the first end shell is 50-60 mm.
The earphone according to claim 5, wherein when the earphone is worn, there is an angle between the extension direction of the long axis and the vertical direction, and the first contact surface is higher than the first contact surface. Two contact surface.
The earphone according to claim 1, wherein the connecting end of the mouthpiece is connected to the edge of the first end shell, and the mouthpiece extends in a third direction, and is positioned along the first direction. In the vertical projection, the free end of the mouthpiece reaches outside the outer contour of the first end shell; wherein, between the third direction and the second direction is in the vertical projection along the first direction The included angle is 70 to 110 degrees.
The earphone according to claim 9, wherein the earphone further comprises electronic components, and the electronic components include a horn unit, a circuit board, a battery, and an antenna;

The horn unit and the mouthpiece are matched and installed, and the circuit board, battery, and antenna are sequentially installed on the first end shell and the second end shell in the direction from the first end shell to the second end shell. In the accommodating space enclosed by the main casing and the second end casing.
The earphone according to claim 10, wherein the speaker unit is a moving iron speaker or a moving coil speaker;

In the case that the horn unit is a moving iron speaker, two ends of the moving iron speaker are respectively installed in the mouthpiece and the first end shell.
The earphone according to claim 1, wherein in the first direction, the longest distance between the first end shell and the second end shell is 12-20 mm.
An earphone, characterized by comprising a first end shell, a main shell and a second end shell, the main shell including a first end and a second end, the first end and the second end The ends are respectively connected to the first end shell and the second end shell, and a sound mouth is provided on the first end shell;

The first end includes a nearly circular surface, the second end includes a near V-shaped surface and a curved surface arranged opposite to the near V-shaped surface in the radial direction of the second end; the earphone In the wearing state, the near-circular surface falls into the inner ear socket, and the tip of the near-V-shaped surface points to the cutout between the screens; in the direction along the first end shell to the second end shell, The tip and the two sides of the tip are close to each other toward the radial inside of the main housing, and the two sides of the tip are covered by the tragus and the antitragus.
The earphone according to claim 13, wherein the second end shell is drop-shaped, and the extension direction of the long axis of the drop-shaped second end shell is in the direction of the normal line of the tip. The vertical projections on the two end shells extend in the same direction.
The headset according to claim 14, wherein the main housing and/or the second end shell are provided with a first microphone mounting portion and a second microphone mounting portion; the first microphone mounting portion and The vertical projections of the second microphone mounting portion on the second end shell are all located on the straight line corresponding to the long axis.
The earphone according to claim 13, wherein the mouthpiece comprises a free end and a connecting end connected to the edge of the first end shell; the vertical projection of the free end on the first end shell is located Outside the outer contour of the first end shell.
The earphone according to claim 16, wherein when the earphone is worn, the connection between the highest point and the lowest point of the earphone constitutes a first connection, and in the vertical projection of the first end shell , The free end and the tip are located on the same side of the first connecting line.
The headset according to claim 13, wherein the distance between the first support point and the second support point when the headset is worn is greater than the distance between the first support point and the center of gravity of the headset The distance; wherein, the first support point is an equivalent support point between the earphone and the ear canal, and the second support point is between the earphone and the tragus, or between the earphone and the antitragus Equivalent support point between.
The earphone according to claim 18, wherein the earphone comprises a first part and a second part, and when the earphone is worn, the first part is located near the first support point of the second support point. Point, the second part is located on the side of the second support point away from the first support point, the volume of the first part is greater than the volume of the second part, and the center of gravity of the earphone Located in the first part.
The earphone according to claim 13, wherein the curved surface extends toward the nearly circular surface to form an avoiding surface that avoids the helix.
An earphone, characterized in that it comprises a first end shell, a main shell and a second end shell which are sequentially connected along a first direction; A V-shaped portion, opposite ends of the main housing in the first direction are respectively connected to the near-circular portion and the near-V-shaped portion; a mouthpiece is provided on the first end shell;

The projection of the near-V-shaped portion on the first end shell along the first direction falls into the outer contour of the first end shell, and the main housing includes a portion included from the near-circular portion The edge of the arc-shaped end surface smoothly transitions to the transition curve of the near-V-shaped end surface edge included in the near-V-shaped portion;

In the direction along the first end shell to the second end shell, the transition curved surface is closer to a first reference line, and the first reference line is parallel to the first direction and passes through the near The straight line at the center of the circular part;

The connecting end of the sound mouth is connected to the edge of the first end shell; in the vertical projection along the first direction, the free end of the sound mouth reaches outside the outer contour of the first end shell;

The extension direction of the connecting end to the free end is the extension direction of the normal at the turning point of any near-V-shaped cross section of the near-V-shaped part, in the vertical projection along the first direction. The included angle is 70 to 110 degrees.
The earphone according to claim 21, wherein any near-V-shaped cross-section of the near-V-shaped part is symmetrical with respect to a normal at a turning point of the any near-V-shaped cross-section.
The earphone according to claim 21, wherein the second end shell has a drop shape, and the extension direction of the long axis of the drop shape is similar to any near-V-shaped cross section of the near-V-shaped part. The extension direction of the normal at the turning point is the same.