Waterproof structure of earphone cavity

Abstract

The utility model discloses a waterproof structure of an earphone cavity, which comprises an earphone head with a cavity inside and a loudspeaker unit installed in the cavity, the head is provided with a sound outlet hole and an air hole which are communicated with the cavity, and the inner wall of the cavity is sequentially provided with an air hole net and a waterproof cover corresponding to the position of the air hole. A cover body space is formed in the waterproof cover, and a plurality of air holes are formed in the waterproof cover. The edge of the waterproof cover is in sealed connection with the inner wall of the cavity, and the cavity is communicated with the external space through the air holes after sequentially passing through the air holes, the cover body space and the air hole net. According to the utility model, the air hole net is attached to the position of the conventional air hole to prevent water, and the waterproof cover is additionally arranged. A secondary waterproof effect is achieved through the waterproof cover, and water flow is effectively prevented from entering the earphone cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to earphone product technical field, especially an earphone cavity waterproof structure capable of improving earphone waterproof grade. BACKGROUND

[0002] Wireless earphones must achieve a certain waterproof effect to adapt to their use scenarios. For example, the waterproof grade of an outdoor sports earphone needs to reach IPX6. A ventilation hole (or tuning hole) is usually provided on the sound cavity of the earphone. These ventilation holes have the effects of tuning, reducing pressure, preventing resonance, reducing low-frequency suppression effect, improving sound quality, and reducing noise. However, the presence of the ventilation holes makes it difficult to design the earphone to be waterproof.

[0003] Currently, earphones usually use a mesh cloth (or mesh) to prevent water from entering the ventilation hole. For earphones with high waterproof requirements, the following methods can be used to improve waterproof effect: 1. using waterproof sound-permeable membrane technology, and 2. increasing the mesh count (density). For waterproof sound-permeable membrane technology, a waterproof sound-permeable membrane is added at the ventilation hole position. However, the service life of the waterproof sound-permeable membrane is limited, and after a certain period of use, the waterproof membrane will gradually degrade due to various factors (such as ultraviolet radiation, temperature changes, physical wear, etc.). For the method of increasing the mesh count to improve waterproof effect, the problem is that it leads to insufficient ventilation, affecting the sound quality of the earphone.

[0004] See Chinese Utility Model Patent No. 200720055970.7, which discloses a waterproof earphone. The waterproof earphone is designed to prevent water from entering the sound outlet. The technical solution is to set a horn mesh at the sound outlet, and the diameter of the small holes on the horn mesh is set to be small enough to prevent water from entering the sound outlet through the horn mesh using the surface tension of water. However, this design using the surface tension of water to prevent water has the following disadvantages: this waterproof design can only prevent water in the case of small water flow impact, but if the water flow impact is large, water will still pass through the mesh holes. For example, in a rainy state, if the raindrops directly hit the ventilation hole position, the impact force of the raindrops will cause water droplets to pass through the mesh holes, causing the earphone to leak.

[0005] In view of the above, in order to improve the waterproof level of the earphone, the present inventors propose the following technical solution. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a waterproof structure for an earphone cavity.

[0007] In order to solve the above technical problems, the utility model adopts the following technical scheme: a waterproof structure of earphone cavity, including earphone head portion that has cavity inside, loudspeaker unit installed in cavity, the head portion is provided with sound hole and air hole that communicate with cavity, the position of air hole in cavity inner wall is provided with air hole net and waterproof cover in proper order, the waterproof cover is formed with cover space in it, a plurality of air holes are opened in the waterproof cover; The edge of the waterproof cover is sealedly connected with the inner wall of the cavity, the cavity is communicated with the outside space through the air hole, the cover space and the air hole net, and the air hole.

[0008] Further, in the above technical solution, the air hole diameter is less than 2.7mm. The capillary length of water droplets is about 2.7mm. When the air hole diameter is less than this size, the surface tension of water will cause the water to form water droplets, which cannot pass through the air hole. The preferred size is 0.3-1.2mm.

[0009] Further, in the above technical solution, the loudspeaker unit divides the cavity into front sound cavity and rear sound cavity, the sound hole is communicated with the front sound cavity, and the air hole is communicated with the rear sound cavity.

[0010] Further, in the above technical solution, the waterproof cover is integrally formed by using silica gel material, and the surface of the silica gel material has a certain hydrophobic effect. Even if the water droplets impact force enters the cover space of the waterproof cover, the waterproof cover of the silica gel material can still prevent the water droplets from entering the earphone cavity through the air hole.

[0011] Further, in the above technical solution, the position corresponding to the air hole of the inner wall of the cavity is formed with a mounting position, which is a recess provided on the plane of the inner wall of the cavity. The mounting position is designed as a plane to facilitate fitting and improve the sealing effect.

[0012] Further, in the above technical solution, the air hole net has a bottom surface fitted with the plane of the mounting position, and the middle area of the bottom surface is formed with a hollow area corresponding to the air hole. The mesh holes on the air hole net are communicated with the air hole through the hollow area. The open end of the waterproof cover is fitted on the plane of the mounting position and is sealingly connected with the mounting position.

[0013] Further, in the above technical solution, a baffle is provided around the mounting position. The baffle blocks the interference of other components (mainly the connecting wires) in the earphone with the waterproof cover. Generally, the baffle includes a left baffle and a right baffle located on the opposite sides of the mounting position, and a rear baffle located on the rear side of the mounting position.

[0014] Further, in the above technical solution, the utility model can be used in earplug earphones, that is, the earphone head portion includes a front cover and a rear cover, and the rear cover is fixed with the earphone rod portion. The sound hole is opened on the front cover, and the air hole is opened on the rear cover.

[0015] The utility model discloses the above technical scheme has the following advantages:

[0016] Firstly, the utility model discloses the waterproof cover is additionally increased except being attached to the waterproof mesh (the mesh cloth) for preventing water at the position of the conventional air hole, realizes the secondary waterproof function through the waterproof cover, and effectively prevents the water flow from entering the earphone cavity, causes the short circuit problem etc.

[0017] Secondly, the waterproof cover of the utility model is opened with the air hole, and the cavity is communicated with the external space through the air hole after passing through the air hole mesh and the air hole, so that the normal air permeability of the loudspeaker unit is not affected.

[0018] Finally, the waterproof test can be successfully carried out without increasing the mesh number of the air hole mesh, and the sound quality of the earphone is not affected.

[0019] The utility model discloses the waterproof structure of the air hole mesh and the waterproof cover jointly functions, and the waterproof level of the air hole of the earphone can reach the waterproof requirement of IPX7 level or above. DRAWINGS:

[0020] Figure 1 It is the perspective view of the utility model;

[0021] Figure 2 It is the front view of the utility model;

[0022] Figure 3 It is Figure 2 the A-A direction section view of the utility model;

[0023] Figure 4 It is the exploded view of the utility model;

[0024] Figure 5 It is the exploded view of the earphone head, the air hole mesh and the waterproof cover in the utility model;

[0025] Figure 6 It is the another perspective exploded view of the air hole mesh and the waterproof cover in the utility model. CONCRETE IMPLEMENTATION:

[0026] The utility model is further illustrated below with the earplug earphone as an example and the drawings.

[0027] The utility model discloses a waterproof structure of earphone cavity, as shown in Figures 1 to 6 The utility model discloses the head 1 in, the cavity 10 is formed, and the cavity 10 is not only used for installing the loudspeaker unit 3, but also as the sound cavity of earphone.

[0028] The head 1 is provided with an acoustic outlet hole 110 and a ventilation hole 120 which are communicated with the cavity 10. Since the earphone is taken as an example, the head 1 of the earphone comprises a front cover 11 and a rear cover 12, and the rear cover 12 is integrally formed with the stem 2 of the earphone. The circuit board 4 of the earphone is usually installed in the stem 2. The acoustic outlet hole 110 is formed in the front cover 11, and the ventilation hole 120 is formed in the rear cover 12.

[0029] In combination Figure 3 As shown, the loudspeaker unit 3 divides the cavity 10 into a front sound cavity 101 and a rear sound cavity 102. The front sound cavity 101 is provided with the acoustic outlet hole 110, and the sound generated by the loudspeaker unit 3 is conducted outward through the acoustic outlet hole 110. The rear sound cavity 102 is provided with the ventilation hole 120. The waterproof structure of the ventilation hole 120 is discussed in the utility model, and the waterproof design at the acoustic outlet hole 110 is not discussed in the utility model.

[0030] The utility model sequentially provides ventilation hole net 5 and waterproof cover 6 at the position of the ventilation hole 120 on the inner wall of the cavity 10. Waterproof is realized through the combined action of the two waterproof structures of the ventilation hole net 5 and the waterproof cover 6.

[0031] The ventilation hole net 5 is usually made of ventilation mesh cloth. For example, a conventional 300-mesh ordinary mesh cloth is used.

[0032] The waterproof cover 6 is generally in the shape of a cover body, and a cover body space 61 is formed in the waterproof cover 6. A plurality of air holes 60 are formed in the main body of the waterproof cover 6. These air holes 60 are used to realize the normal flow of air. The cavity 10 can sequentially pass through the air holes 60, the cover body space 61 and the ventilation hole net 5, and then be communicated with the external space through the ventilation hole 120, so that the normal ventilation of the loudspeaker unit 3 is ensured when the loudspeaker unit 3 works, and the sound quality of the earphone is not affected.

[0033] The waterproof cover 6 in the embodiment is preferably integrally formed by using silica gel material. The silica gel material has good hydrophobic effect, and can further improve the waterproof effect. The diameter of the air hole is less than 2.7 mm. Since the capillary length of water droplets is about 2.7 mm, when the diameter of the air hole 60 is less than the size, the surface tension of water will cause the water to form water droplets, and the water droplets cannot pass through the air hole 60. Preferably, the diameter of the air hole 60 is 0.3-1.2 mm, for example, the diameter of the air hole 60 is 0.5 mm.

[0034] Under normal circumstances, the head 1 of the earphone is generally in an irregular shape, so the inner wall of the earphone cavity 10 is usually an irregular curved surface, which is not conducive to the sealing and fitting of the waterproof cover 6 and the inner wall of the cavity 10. Therefore, the utility model forms a mounting position 121 on the inner wall of the cavity 10 corresponding to the position of the ventilation hole 120. In combination Figure 5As shown, the mounting position 121 is a recessed flat surface arranged on the inner wall of the cavity 10. The flat surface not only facilitates the attachment of the air hole mesh 5, but also facilitates the attachment of the waterproof cover 6.

[0035] To further ensure sealing, the air hole mesh 5 has a bottom surface 51 attached to the flat surface of the mounting position 121, and the middle region of the bottom surface 51 is formed with a hollowed-out area corresponding to the air hole 120. The mesh holes 50 on the air hole mesh 5 are in communication with the air hole 120 through the hollowed-out area, and the mesh holes 50 on the air hole mesh 5 do not penetrate in the non-hollowed-out area of the bottom surface 51. When attached, the bottom surface 51 of the air hole mesh 5 is attached to the flat surface of the mounting position 121 by glue, and the hollowed-out area is positioned corresponding to the air hole 120.

[0036] The open end of the waterproof cover 6 is attached to the flat surface of the mounting position 121 and is sealed and connected to the mounting position 121 by glue. In this way, the open end of the entire waterproof cover 6 is located in the recessed area of the cavity 10, which is conducive to sealing.

[0037] In order to avoid collisions with the waterproof cover during the installation process and subsequent use of the earphone, a baffle is arranged around the mounting position. Specifically, in combination with Figure 5 As shown, the baffle includes a left baffle 122 and a right baffle 123 located on opposite sides of the mounting position 121, and a rear baffle 124 located on the rear side of the mounting position 121. The baffle not only protects the entire waterproof cover 6, but also facilitates subsequent glue sealing operations to avoid glue overflow.

[0038] In use, the first waterproof structure is formed by the air hole mesh 5, which can block most of the water flow. When encountering water splashing or raindrops directly impacting, the air hole mesh 5 will block the water flow impact force. Even if water penetrates through the air hole mesh 5 and enters the cover space of the waterproof cover 6, the penetrating water flow has no impact force. At this time, the second waterproof structure is formed by the waterproof cover 6 to block the water flow from entering the earphone cavity 10. Although the air hole 60 is provided on the waterproof cover 6, the diameter of the air hole 60 is smaller than the capillary length of water, and under the action of the surface tension of water, the penetrating water flow tends to form a spherical shape and cannot flow through the air hole 60. The penetrating water droplets exist in the cover space 61 and cannot enter the earphone cavity 10 from the air hole 60. After a period of time, the water droplets are naturally dried under the action of the external temperature and airflow.

[0039] Tests have shown that when the air hole mesh 5 is made of a common mesh cloth with a mesh size of 300 and the air hole 60 of the waterproof cover 6 has a diameter of 0.5 mm, the waterproof level of the earphone air hole 120 position can reach IPX7 level.

[0040] The utility model discloses not only be used for earplug earphone, also can be used for other earphone product's breathable hole position waterproof. Of course, above only be the specific embodiment of the utility model, and not to limit the utility model implementation range, and all equivalent changes or modification of the structure, features and principles of the utility model application patent range, should be included in the utility model application patent range.

Claims

1. A waterproof structure of earphone cavity, comprising an earphone head (1) with a cavity (10) inside, a speaker unit (3) installed in the cavity (10), and sound holes (110) and air holes (120) provided on the head (1) and communicating with the cavity (10), characterized in that: a waterproof cover (6) and an air hole net (5) are sequentially arranged on the inner wall of the cavity (10) corresponding to the air holes (120), the waterproof cover (6) is formed with a cover space (61) inside, and a plurality of air holes (60) are provided on the waterproof cover (6); the edge of the waterproof cover (6) is sealingly connected with the inner wall of the cavity (10), and the cavity (10) communicates with the outside through the air holes (60), the cover space (61), the air hole net (5), and the air holes (120) in sequence. The diameter of the air holes (60) is less than 2.7 mm. The speaker unit (3) divides the cavity (10) into a front sound cavity (101) and a rear sound cavity (102), the sound holes (110) communicate with the front sound cavity (101), and the air holes (120) communicate with the rear sound cavity (102).

2. The waterproof structure of an earphone cavity according to claim 1, characterized in that: The waterproof cover (6) is integrally formed by using silica gel material.

3. The waterproof structure of an earphone cavity according to claim 1, characterized in that: The inner wall of the cavity (10) is formed with a mounting position (121) corresponding to the air holes (120), and the mounting position (121) is a recess arranged on the plane of the inner wall.

4. The waterproof structure of an earphone cavity according to claim 1, characterized in that: The air hole net (5) has a bottom surface (51) adhering to the plane of the mounting position (121), the middle region of the bottom surface (51) is formed with a hollowed-out area corresponding to the air holes (120), the mesh holes (50) on the air hole net (5) communicate with the air holes (120) through the hollowed-out area, and the opening end of the waterproof cover (6) adheres to the plane of the mounting position (121) and is sealingly connected with the mounting position (121).

5. The waterproof structure of an earphone cavity according to claim 1, characterized in that: A baffle is arranged around the mounting position.

6. The waterproof structure of an earphone cavity according to claim 5, characterized in that: The baffle comprises left and right baffles (122, 123) located on opposite sides of the mounting position (121) and a rear baffle (124) located on the rear side of the mounting position (121).

7. The waterproof structure of an earphone cavity according to claim 5, characterized in that: The earphone head (1) comprises a front cover (11) and a rear cover (12), the rear cover (12) is fixed with an earphone stem (2), the sound holes (110) are provided on the front cover (11), and the air holes (120) are provided on the rear cover (12).

8. The waterproof structure of an earphone cavity according to claim 7, characterized in that: The earphone is an earplug type earphone.

9. The waterproof structure of an earphone cavity according to any one of claims 1-8, characterized in that: ​ 10. The waterproof structure of an earphone cavity according to claim 9, characterized in that: ​

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