Structure for balancing pressure of earphone cavity

Abstract

The utility model discloses a structure for balancing the pressure of an earphone cavity, and relates to the technical field of earphone structures, in the structure, an earphone body and an upper cover form a containing cavity, and the containing cavity at least comprises a sound production unit, a damping support and a circuit system; a first groove and a second groove are formed in the containing cavity, the sound production unit is contained in the first groove, the damping support is contained in the second groove, and the first groove is communicated with the second groove through a groove. The interior of the earphone cavity (containing cavity) is communicated through the groove, so that the pressure of the front cavity and the pressure of the rear cavity are balanced, and meanwhile, the balance hole is formed in the edge of the upper cover to play a role in sound release. According to the structure, a small hole formed in the earphone front cavity is omitted, and foreign matters are effectively prevented from entering the earphone cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of earphone structures, in particular to an internal structure of an earphone cavity, which is used for balancing the internal pressure of the earphone cavity. Background Art

[0002] The sound outlet and rear discharge holes of headphones are factors that affect the frequency response curve of headphones. In particular, as users have increasingly higher requirements for sound quality, in order to balance the pressure inside the headphone cavity, pressure equalizing holes are usually opened in the front and rear cavities of the headphones.

[0003] The Chinese utility model patent (CN206181329U) discloses a hidden equalizing hole tuning device for the front sound cavity of the earphone, which is used to adjust the acoustic resistance value by opening an equalizing hole in the front cavity and controlling the size of the equalizing hole through an open circular ring.

[0004] Common earphones have a small hole in the front cavity, and a damping mesh is installed at the hole to balance the pressure and release sound. The hole exposed to the outside is easy for foreign objects (earwax, hair, etc.) to enter and block the hole. Unlike the sound hole, it is more difficult to install anti-scaling components. Foreign objects continue to accumulate on the damping mesh, affecting the sound quality of the earphones. Utility Model Content

[0005] The main purpose of the utility model is to solve the technical problems raised above. An air-deflation damping bracket is added to the internal structure. The air-deflation damping bracket is connected to the front cavity sound outlet hole through a groove, eliminating the small hole in the front cavity and preventing foreign matter from entering.

[0006] According to the utility model, a structure for balancing the pressure of an earphone cavity is proposed, the earphone having an earphone body and an upper cover, the earphone body and the upper cover forming a containing chamber, the containing chamber comprising at least a sound unit, a damping bracket and a circuit system; wherein a first groove and a second groove are provided in the containing chamber, the sound unit is accommodated in the first groove, the damping bracket is accommodated in the second groove, and the first groove and the second groove are connected via a groove.

[0007] Preferably, a first flange is provided inside the first groove, and the front end of the sound-emitting unit abuts against the first flange; a second flange is provided inside the second groove, and one end of the damping bracket abuts against the second flange.

[0008] Preferably, the sound-generating unit divides the accommodating chamber into a front chamber and a rear chamber, and the front chamber is connected to the rear chamber through the groove.

[0009] Preferably, a damping mesh is provided at the end of the damping bracket.

[0010] Preferably, a through hole is provided in the axial direction of the damping bracket, and a third groove is provided in the damping bracket away from the second flange, and the third groove cooperates with the damping mesh.

[0011] Preferably, a third flange matching with the opening of the second groove is provided on the outer side of the damping bracket.

[0012] Preferably, a wiring socket is provided on the earphone body.

[0013] Preferably, a balancing hole is provided on the edge of the upper cover.

[0014] The utility model proposes a structure for balancing the pressure of an earphone cavity, in which the earphone body and the upper cover form a containing chamber, and the containing chamber at least includes a sound unit, a damping bracket and a circuit system; a first groove and a second groove are provided in the containing chamber, the sound unit is accommodated in the first groove, the damping bracket is accommodated in the second groove, and the first groove and the second groove are connected through the groove. The earphone cavity (accommodating chamber) is connected through the groove, so that the pressure of the front chamber and the rear chamber is balanced, and at the same time, a balancing hole is opened on the edge of the upper cover to play a role in sound leakage. This structure omits the small hole opened in the front cavity of the earphone, and effectively prevents foreign matter from entering the earphone cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] With reference to the accompanying drawings, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings are only used for illustrative purposes and are not intended to limit the protection scope of the present utility model.

[0016] Figure 1 A schematic diagram of the structure of earphones provided in some embodiments of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the earphone shown;

[0018] Figure 3 for Figure 1 A schematic structural diagram of an earphone body of the earphone shown;

[0019] Figure 4 for Figure 3 A schematic cross-sectional view of an earphone body of the earphone shown;

[0020] Figure 5 for Figure 3 Another schematic cross-sectional view of the earphone body of the earphone shown;

[0021] Figure 6 A schematic diagram of the structure of a damping bracket and a damping mesh cloth of an earphone provided in some embodiments of the utility model;

[0022] Figure 7 for Figure 1 Schematic diagram of the structure of the upper cover of the earphone shown.

[0023] Description of Figure Numbers:

[0024] 1. Headphones;

[0025] 10. Earphone body; 10a. Upper cover; 10a1. Balance hole; 10b. Wiring socket; 10c. Earplug sleeve;

[0026] 101, earphone housing; 1011, sound outlet hole; 1012, first groove; 1013, first flange; 1014, second groove; 1015, second flange; 1016, groove;

[0027] 101a, front chamber; 101b, rear chamber;

[0028] 102. Net body;

[0029] 103. Sound unit;

[0030] 104, damping bracket; 1041, through hole; 1042, third groove; 1043, third flange;

[0031] 105. Damping mesh.

[0032] 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

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, the directional indications are only used to explain the position of the user in a certain posture (such as the attached Figure 6 The relative position relationship, movement status, etc. between the various components under the specific posture are shown. If the specific posture changes, the directional indication will also change accordingly.

[0035] The utility model provides an earphone 1, which can be a wireless earphone, connected via Bluetooth or NFC (Near Field Communication), receiving audio signals and outputting them to the user; the earphone 1 can also be a wired earphone, used in conjunction with a device with an audio output port, receiving audio signals and outputting them to the user. The earphone cable of the earphone 1 can be fixedly connected to the earphone, or can be connected to the earphone 1 by a plug-in connector.

[0036] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of earphones provided in some embodiments of the utility model; Figure 2 for Figure 1 The schematic diagram of the exploded structure of the earphone shown. In the embodiment, the earphone 1 is a plug-in wiring earphone, and the earphone 1 includes an earphone body 10, an upper cover 10a, a wiring socket 10b and an earplug cover 10c. When the earphone 1 is a wireless earphone, the wiring socket 10b can be omitted. The earplug cover 10c is in direct contact with the skin, and soft materials such as silicone sleeves, rubber sleeves, etc. are selected to reduce discomfort to the ears when worn for a long time and improve the user's wearing comfort. It can be understood that the earplug cover 10c can also be omitted.

[0037] Figure 2 The following figures and the accompanying drawings only schematically illustrate some components of the headset, and the actual shapes, sizes and positions of these components are not subject to Figure 2 Limitations of the drawings.

[0038] The earphone body 10 serves as the functional carrier of the earphone 1. It contacts the user and the outside world and is connected to the earphone cable. Therefore, the outer shell needs to have a certain strength and rigidity to avoid scratches and scrapes on the surface of the earphone body 10 (earphone shell 101 and upper cover 10a). It must also have properties such as wear resistance, bump resistance, fragility resistance, and corrosion resistance. Therefore, the optional materials for the outer shell include metal materials, hard plastics, composite materials, etc., and the surface can also be treated with anti-wear and anti-corrosion treatments.

[0039] See also Figure 2 The earphone body 10 includes an earphone shell 101, one end of which is a sound outlet 1011, which extends outward from the earphone shell 101, and a mesh body 102 is provided at the end of the sound outlet 1011 to prevent foreign objects from entering the sound outlet 1011.

[0040] A protrusion is provided on the outside of the sound outlet hole 1011 for clamping the earplug sleeve 10c. It can be known that the protrusion can be continuously arranged along the outer circumference of the sound outlet hole 1011 to form a step type, or can be arranged at intervals along the outer circumference of the sound outlet hole 1011.

[0041] The earphone housing 101 and the upper cover 10a form a containing chamber for accommodating the sound unit 103, the damping bracket 104, the damping mesh 105 and other necessary components.

[0042] See also Figure 3 , Figure 4 and Figure 5 A first groove 1012 is provided inside the earphone housing 101, and the first groove 1012 cooperates with the sound unit 103. The sound unit 103 is placed in the first groove 1012, dividing the accommodating chamber into a front chamber 101a and a rear chamber 101b.

[0043] The front chamber 101a extends away from the sound unit 103 and is connected to the sound outlet 1011. The front end (bell mouth) of the sound unit 103 faces the front chamber 101a, and the rear end (the other side of the bell mouth) of the sound unit 103 faces the rear chamber 101b. The sound unit 103 converts the electrical signal into mechanical vibration of the diaphragm, causing the diaphragm to vibrate inside the accommodating chamber and produce sound. When the diaphragm vibrates, the sound pressure in the accommodating chamber (the front chamber 101a and the rear chamber 101b) changes with the frequency to form the frequency response curve of the earphone. In order to ensure the stability of the sound pressure, a small hole ( Figure 2 The dotted circle in the figure is used to equalize pressure and release sound. The exposed holes are easy for foreign objects (earwax, hair, etc.) to enter and block the holes. The continuous accumulation of foreign objects will affect the sound quality of the headphones.

[0044] A first flange 1013 is disposed at the lower inner end of the first groove 1012. The sound generating unit 103 is disposed in the first groove 1012, and its front end just abuts against the first flange 1013. The height of the first flange 1013 is less than the height of the side wall of the first groove 1012.

[0045] A second groove 1014 is provided near the first groove 1012 . The second groove 1014 matches with the damping bracket 104 . A damping mesh 105 is provided on the top of the damping bracket 104 .

[0046] A second flange 1015 is disposed at the lower inner end of the second groove 1014. The damping bracket 104 is placed in the second groove 1014, and its front end just abuts against the second flange 1015. The height of the second flange 1015 is less than the height of the side wall of the second groove 1014.

[0047] The height of the side wall of the first groove 1012 and the height of the side wall of the second groove 1014 may be the same or different, depending on the structure of the damping bracket 104 .

[0048] A groove 1016 is provided at the closest distance between the bottom of the first groove 1012 and the second groove 1014 to connect the first groove 1012 and the second groove 1014. When the sound unit 103 is placed in the first groove 1012, the accommodating chamber is divided into a front chamber 101a and a rear chamber 101b, and the front chamber 101a is connected to the second groove 1014 through the groove 1016, so that the pressure balance between the front chamber 101a and the rear chamber 101b (the second groove 1014) is achieved.

[0049] The earphone body 10 connects the front chamber 101a and the rear chamber 101b by setting a connecting channel (groove 1016), and uses the sound damping generated by the damping bracket 104 and the damping mesh 105 to balance the sound pressure in the accommodating chamber (the front chamber 101a and the rear chamber 101b), eliminating the need to open a small hole on the earphone shell 101, thereby preventing foreign matter from entering the accommodating chamber through the small hole and affecting the sound and sound quality.

[0050] like Figure 6 As shown, the damping bracket 104 is cylindrical, and a through hole 1041 is opened in the center of the damping bracket 104. The through hole 1041 passes through from top to bottom. A third groove 1042 is provided at one end of the damping bracket 104. The third groove 1042 cooperates with the damping mesh 105, and the damping mesh 105 is provided with mesh holes (not shown in the figure).

[0051] The damping bracket 104 cooperates with the damping mesh 105, one end of the through hole 1041 is connected to the groove 1016, and the other end is connected to the damping mesh 105. The acoustic pressure of the front chamber 101a and the rear chamber 101b can be balanced by the aperture size and density of the damping mesh 105.

[0052] A third flange 1043 is provided on the outer side wall of the damping bracket 104. The damping bracket 104 is placed in the second groove 1014. The third flange 1043 on the damping bracket 104 cooperates with the opening of the side wall of the second groove 1014 to prevent the damping bracket 104 from rotating or falling off.

[0053] For example, a balancing hole 10a1 is provided on the side of the upper cover 10a in the above embodiment, and the size of the rear chamber 101b has a great influence on the audio quality. At the same time, the sound pressure in the rear chamber 101b has the greatest influence on the frequency response curve, especially the high frequency part. For the detailed relationship between the sound pressure and the frequency response curve, see the literature: He Jie, Xie Zhiwen. Influence of the sound outlet and rear bleed hole on the frequency response curve of the earmuff headphone [C] / / Chinese Acoustical Society. Proceedings of the 2017 National Acoustics Academic Conference of the Chinese Acoustical Society. School of Physics and Optoelectronics, South China University of Technology; 2017:2.

[0054] It can be known that the balance hole 10a1 can be set at the connection between the earphone shell 101 and the upper cover 10a, which is far away from the user's ear canal, avoiding the balance hole 10a1 from directly contacting the human skin and allowing foreign matter to enter the interior of the earphone's accommodating chamber.

[0055] In order to obtain the expressiveness of different sound effects, the sound unit 103 with different sound frequencies can be replaced to meet the personalized pursuit of music enthusiasts. At the same time, the sound unit 103 can be set with different pronunciation frequencies or multiple speakers with different sound frequencies can be set in the sound unit 103, so that the same headset can change multiple sound effects.

[0056] The sound unit 103 includes a moving coil type, a moving iron type, or other types of electric energy-mechanical-sound conversion type sound generating devices or components.

[0057] The above description is only an optional 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 inventive 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. A structure for balancing the pressure of an earphone cavity, the earphone (1) comprising an earphone body (10) and an upper cover (10a), the earphone body (10) and the upper cover (10a) forming a receiving chamber, the receiving chamber comprising at least a sound unit (103), a damping bracket (104) and a circuit system; characterized in that: A first groove (1012) and a second groove (1014) are provided in the accommodating chamber, the sound-generating unit (103) is accommodated in the first groove (1012), the damping bracket (104) is accommodated in the second groove (1014), and the first groove (1012) and the second groove (1014) are connected via a groove (1016).

2. The structure according to claim 1, characterized in that: A first flange (1013) is provided inside the first groove (1012), and the front end of the sound-generating unit (103) abuts against the first flange (1013); a second flange (1015) is provided inside the second groove (1014), and one end of the damping bracket (104) abuts against the second flange (1015).

3. The structure according to claim 2, characterized in that: The sound-generating unit (103) divides the accommodating chamber into a front chamber (101a) and a rear chamber (101b); the front chamber (101a) and the rear chamber (101b) are connected via the groove (1016).

4. The structure according to claim 3, characterized in that A damping mesh cloth (105) is provided at the end of the damping bracket (104).

5. The structure according to claim 4, characterized in that: The damping bracket (104) is provided with a through hole (1041) in the axial direction, and the damping bracket (104) is provided with a third groove (1042) in a direction away from the second flange (1015), and the third groove (1042) cooperates with the damping mesh (105).

6. The structure according to claim 5, characterized in that The outer side of the damping bracket (104) is provided with a third flange (1043) which matches with the opening of the second groove (1014).

7. The structure according to any one of claims 1 to 6, characterized in that: The earphone body (10) is provided with a female terminal socket (10b).

8. The structure according to any one of claims 1 to 6, characterized in that: A balancing hole (10a1) is provided on the edge of the upper cover (10a).

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