Earphone vent hole waterproof structure and waterproof method

Abstract

The invention discloses an earphone vent hole waterproof structure and waterproof method, the waterproof structure comprises an earphone head and a loudspeaker unit installed in a cavity, the head is provided with a sound outlet hole and a vent hole which are communicated with the cavity, the sound outlet hole is communicated with a front sound cavity, and the vent hole is communicated with a rear sound cavity. An air hole net and a waterproof cover are sequentially arranged at the positions, corresponding to the air holes, of the inner wall of the cavity, a cover body space is formed in the waterproof cover, a plurality of air holes are formed in the waterproof cover, and a sponge body used for water absorption and ventilation is arranged in the cover body space; the cavity sequentially passes through the air holes, the cover body space, the sponge body and the air hole net and then is communicated with the external space through the air holes, the air hole net is attached to the position of the conventional air hole to prevent water, and a waterproof cover is additionally arranged at the position of the conventional air hole. 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 present invention relates to the technical field of earphone products, and in particular to an earphone vent waterproof structure and a waterproof method for improving the waterproof level of the earphone. Background Art

[0002] In order to adapt to their usage scenarios, wireless headphones must achieve a certain waterproof effect. For example, for outdoor sports headphones, their waterproof level needs to reach IPX6. In addition, since it is necessary to open air holes (or tuning holes) on the sound cavity of the headphones, these air holes have the functions of tuning, reducing pressure, preventing resonance, and reducing low-frequency suppression effects, which are used to improve sound quality and reduce noise. It is precisely because of the existence of air holes that the waterproof design of the headphones is somewhat difficult.

[0003] At present, earphones usually have mesh (or perforated mesh) at the vents for waterproofing. For earphones with high waterproofing requirements, the waterproofing effect can be improved by the following methods: 1. Using waterproof sound-permeable membrane technology, 2. Increasing the mesh count (density) of the mesh. For waterproof sound-permeable membrane technology, a waterproof sound-permeable membrane is added at the vent position, but the service life of the waterproof sound-permeable membrane is limited. After a certain period of use, the performance of the waterproof membrane will gradually decline due to various factors (such as ultraviolet radiation, temperature changes, physical wear, etc.). For improving the waterproofing effect by increasing the mesh count of the mesh, the problem caused is: insufficient air permeability, affecting the sound quality of the earphones.

[0004] See the Chinese invention patent with patent number 200720055970.7, which discloses a waterproof headset. The waterproof headset is a waterproof design for the sound outlet. The technical solution adopted is to set a speaker mesh on the sound outlet, set the diameter of the small holes on the speaker mesh small enough, and use the surface tension of water to prevent water from passing through the speaker mesh into the sound outlet. However, this design that uses the surface tension of water for waterproofing has the following shortcomings: this waterproofing can only be waterproof when the impact force of the water flow is small, but if the impact force of the water flow is large, the water flow will still pass through the mesh. For example, in the rainy state, if raindrops directly hit the air vent position, the impact force generated by the raindrops will cause the water droplets to pass through the mesh, causing water to leak into the headset.

[0005] In view of the above, in order to improve the waterproof level of the earphone, the inventor proposes the following technical solution. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a waterproof structure for the air vents of earphones.

[0007] In order to solve the first technical problem mentioned above, the present invention adopts the following technical scheme: a waterproof structure of earphone air holes, comprising an earphone head with a cavity inside, a speaker unit installed in the cavity, the head is provided with a sound outlet hole and an air hole connected to the cavity, the speaker unit divides the cavity into a front sound cavity and a rear sound cavity, the sound outlet hole is connected to the front sound cavity, the air hole is connected to the rear sound cavity, and an air hole mesh and a waterproof cover are sequentially arranged at positions of the air holes on the inner wall of the cavity corresponding to the air holes, a cover space is formed in the waterproof cover, a plurality of air holes are opened on the waterproof cover, the edge of the waterproof cover is sealed and connected to the inner wall of the cavity, and a sponge body that can be used for absorbing water and ventilation is arranged in the cover space; the cavity passes through the air holes, the cover space, the sponge body, and the air hole mesh in sequence, and then is connected to the external space through the air holes.

[0008] Furthermore, in the above technical solution, the pore diameter is less than 2.7 mm.

[0009] Furthermore, in the above technical solution, the waterproof cover is integrally formed using silicone material.

[0010] Furthermore, in the above technical solution, a mounting position is formed on the inner wall of the cavity at a position corresponding to the air vent, and the mounting position is a plane recessed in the inner wall of the cavity.

[0011] Furthermore, in the above technical solution, a connecting hole communicating with the external space is provided at a position of the installation position away from the air vent.

[0012] Furthermore, in the above technical solution, the air-permeable mesh has a bottom surface that fits the plane of the installation position, and a hollow area corresponding to the air holes is formed in the middle area of ​​the bottom surface, and the mesh holes on the air-permeable mesh are connected with the air holes through the hollow area; the open end of the waterproof cover fits the plane of the installation position and is sealed and connected to the installation position.

[0013] Furthermore, in the above technical solution, a baffle is provided at the periphery of the installation position, and the baffle includes: a left baffle and a right baffle located at opposite sides of the installation position, and a rear baffle located at the rear side of the installation position.

[0014] Furthermore, in the above technical solution, the earphone is an earbud-type earphone, the earphone head includes a front cover and a back cover, the back cover is fixed to the earphone stem; the sound outlet is opened on the front cover, and the air vent is opened on the back cover.

[0015] The second technical problem to be solved by the present invention is to provide a waterproof method for earphone vents, and the technical solution adopted is: a waterproof method for earphone vents, comprising an earphone head with a cavity inside, a speaker unit installed in the cavity, the head is provided with a sound outlet and a vent connected to the cavity, the speaker unit divides the cavity into a front sound cavity and a rear sound cavity, the sound outlet is connected to the front sound cavity, the vent is connected to the rear sound cavity, and a vent mesh and a waterproof cover are sequentially arranged at the position of the vent on the inner wall of the cavity corresponding to the vent, and the waterproof method for the earphone vent is: First, the first waterproof structure is formed through the breathable mesh, which can block most of the water flow; Secondly, a second waterproof structure is formed by using a waterproof cover, and an air hole connected to the rear sound cavity is opened on the waterproof cover, and the diameter of the air hole is smaller than the capillary length of water; Finally, a sponge is arranged in the cover body space, and the sponge is used to absorb the water flow entering the cover body space, and a connecting hole connected to the external space is opened on the head, and a circulating air channel is formed through the connecting hole and the air vent.

[0016] Furthermore, in the above technical solution, the waterproof cover is made of hydrophobic silicone material by integral molding; the diameter of the pores is less than 2.7 mm; and the diameter of the connecting holes is not larger than the diameter of the pores.

[0017] After the present invention adopts the above technical solution, it has the following advantages: Firstly, in addition to fitting a vent mesh (mesh cloth) at the conventional vent position for waterproofing, the present invention also adds a waterproof cover to achieve secondary waterproofing, effectively preventing water from entering the earphone cavity and causing problems such as short circuits.

[0018] Secondly, the waterproof cover of the present invention is provided with air holes, through which the cavity is connected with the external space through the air permeable mesh and the air permeable holes, thereby not affecting the normal ventilation of the speaker unit.

[0019] Furthermore, in order to cope with the situation in which water flows into the waterproof cover, the present invention provides a sponge in the cover space. If water flows into the waterproof cover, it will be absorbed by the sponge, and the water will be prevented from entering the earphone through the pores.

[0020] Finally, the present application can be successfully tested for waterproofness using only ordinary breathable meshes, without increasing the mesh count of the breathable meshes, and without affecting the sound quality of the headphones.

[0021] With the combined effect of the two waterproof structures of the air permeable mesh and the waterproof cover, the waterproof grade of the air permeable holes of the earphone can fully meet the IPX6 waterproof requirement, and can even reach the IPX7 waterproof requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a stereogram of the present invention; Figure 2 It is a front view of the present invention; Figure 3 yes Figure 2 Middle AA section view; Figure 4 is a three-dimensional exploded view of the present invention; Figure 5 It is a three-dimensional exploded view of the earphone head, the air permeable mesh and the waterproof cover in the present invention; Figure 6 This is a three-dimensional exploded view of the air permeable mesh and the waterproof cover in the present invention from another perspective; Figure 7 is a cross-sectional view of a first embodiment of a waterproof cover in the present invention; Figure 8 It is a cross-sectional view of the second embodiment of the waterproof cover in the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described below by taking an earbud-type headset as an example and accompanying drawings.

[0024] The present invention is a waterproof structure for earphone vent holes. Figures 1 to 6 As shown, the present invention comprises: a head portion 1 and a stem portion 2. A cavity 10 is formed in the head portion 1, and the cavity 10 is not only used to install the speaker unit 3, but also serves as a sound cavity of the earphone.

[0025] The head 1 is provided with a sound outlet 110 and a vent 120 connected to the cavity 10. Since the present invention takes an earbud-type earphone as an example, the earphone head 1 includes 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 sound outlet 110 is provided on the front cover 11, and the vent 120 is provided on the rear cover 12.

[0026] Combination Figure 3 As shown, the speaker 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 a sound outlet 110, and the sound generated by the speaker unit 3 is transmitted outward through the sound outlet 110. The rear sound cavity 102 is provided with an air hole 120. The present invention is directed to the waterproof structure and waterproof method of the air hole 120, and the waterproof design of the sound outlet 110 is not within the scope of the present invention.

[0027] In the present invention, a vent mesh 5 and a waterproof cover 6 are sequentially arranged at positions of the inner wall of the cavity 10 corresponding to the vent holes 120. Waterproofing is achieved by the vent mesh 5 and the waterproof cover 6 working together.

[0028] The air permeable mesh 5 is generally made of air permeable mesh cloth, for example, a conventional 300 mesh ordinary mesh cloth.

[0029] The waterproof cover 6 is generally in the shape of a cover body, in which a cover body space 61 is formed, and a plurality of air holes 60 are provided on the main body of the waterproof cover 6. These air holes 60 are for realizing the normal flow of air, and the cavity 10 can pass through the air holes 60, the cover body space 61, and the air permeable mesh 5 in sequence, and then communicate with the external space through the air permeable holes 120, so as to ensure that the speaker unit 3 is normally ventilated when working, and will not affect the sound quality of the earphone.

[0030] The waterproof cover 6 in this embodiment is preferably made of a one-piece silicone material. The silicone material has a good hydrophobic effect and can further improve the waterproof effect. The pore diameter is less than 2.7 mm. Since the capillary length of a water drop is about 2.7 mm, when the pore 60 pore diameter is smaller than this size, the surface tension of the water will cause the water to form water droplets and cannot pass through the pore 60. Combined with the hydrophobic silicone material used in the waterproof cover 6, it can effectively prevent water droplets or water flows entering the waterproof cover 6 from passing through the pore 60 into the cavity 10 of the earphone. Preferably, the pore 60 pore size is 0.3-1.2 mm, for example, the pore 60 pore size is 0.5 mm.

[0031] The aperture of the air hole 120 is larger than the aperture of the air hole 60. Preferably, the ratio of the size of the air hole 120 to the sum of the areas of all the air holes 60 is 1:0.2-0.6.

[0032] Generally, the head 1 of the earphone is generally irregular in shape, so the inner wall of the earphone cavity 10 is usually an irregular arc surface, which is not conducive to the sealing fit between the waterproof cover 6 and the inner wall of the cavity 10. Therefore, the present invention forms a mounting position 121 at the position of the inner wall of the cavity 10 corresponding to the vent hole 120. Figure 5 As shown, the mounting position 121 is a plane recessed in the inner wall of the cavity 10. The plane is not only convenient for the fitting of the air permeable mesh 5, but also convenient for the fitting of the waterproof cover 6.

[0033] In order to further ensure sealing, the vent mesh 5 has a bottom surface 51 that is in contact with the plane of the installation position 121, and a hollow area corresponding to the vent holes 120 is formed in the middle area of ​​the bottom surface 51, and the mesh holes 50 on the vent mesh 5 are connected with the vent holes 120 through the hollow area. The mesh holes 50 on the vent mesh 5 do not penetrate the non-hollow area of ​​the bottom surface 51. When attaching, the bottom surface 51 of the vent mesh 5 is attached to the plane of the installation position 121 by glue, and the hollow area is aligned with the position of the vent hole 120.

[0034] The open end of the waterproof cover 6 is fitted to the plane of the installation position 121 and is sealed and connected to the installation position 121 by glue. In this way, the entire open end of the waterproof cover 6 is located in the recessed area of ​​the cavity 10, which is conducive to sealing.

[0035] During the installation process and subsequent use of the earphone, a baffle is provided around the installation position to avoid collision with the waterproof cover. Figure 5 As shown, the baffle includes: a left baffle 122 and a right baffle 123 located on opposite sides of the installation position 121, and a rear baffle 124 located behind the installation position 121. The baffle can not only protect the entire waterproof cover 6, but also facilitate the subsequent glue sealing operation to prevent glue from overflowing.

[0036] See Figure 7 As shown, this is a cross-sectional view of the first embodiment of the waterproof cover 6. In this first embodiment, the air hole 60 provided on the waterproof cover 6 is inclined, that is, the axis of the air hole 60 is not perpendicular to the plane where the air hole 120 is located, and forms a certain inclination. In addition, the inclination direction of the air hole 60 points to the vibration direction of the eardrum of the speaker unit 3.

[0037] See Figure 8 As shown, this is a cross-sectional view of the second embodiment of the waterproof cover 6. In this second embodiment, the waterproof cover 6 is provided with a vertical air hole 60, that is, the axis of the air hole 60 is perpendicular to the plane where the air hole 120 is located. At the same time, the aperture of the air hole 60 is small outside and large inside, that is, the aperture of the air hole 60 at one end adjacent to the cover body space 61 is smaller than the aperture at one end adjacent to the rear cavity 102, and the apertures at both ends are less than 2.7 mm.

[0038] The advantage of the waterproof cover 6 using the second embodiment is that the smaller aperture on the outside can effectively block large water droplets and dust, reducing the chance of moisture entering the earphone. The larger aperture on the inside helps balance the internal and external air pressure, preventing moisture from being inhaled due to changes in air pressure.

[0039] In addition, the first and second embodiments of the waterproof cover 6 may be combined to form an inclined air hole 60 that is larger inside and smaller outside.

[0040] The waterproof method for the vent hole of the earphone in the present invention is as follows: First, the first waterproof structure is formed by the air-permeable mesh 5, which can block most of the water flow.

[0041] Secondly, the waterproof cover 6 is used to form a second waterproof structure. At the same time, the diameter of the pores 60 opened on the waterproof cover 6 is smaller than the capillary length of water.

[0042] When encountering water splashing and raindrops directly impacting, the air permeable mesh 5 will block the impact force of the water flow. At this time, even if water passes through the air permeable mesh 5 and penetrates into the cover space of the waterproof cover 6, the infiltrated water flow has no impact force. At this time, the waterproof cover 6 forms a second waterproof structure to block water from flowing into the earphone cavity 10. Although the waterproof cover 6 is provided with air holes 60, because the aperture of the air holes 60 is smaller than the capillary length of water, under the action of the surface tension of water, the infiltrated water flow tends to form a sphere and cannot flow through the air holes 60. As a result, the infiltrated water droplets exist in the cover space 61 and cannot enter the earphone cavity 10 from the air holes 60. After a period of time, it dries naturally under the drive of the external temperature and airflow.

[0043] Finally, a sponge 7 is arranged in the cover space 61, and the sponge 7 is used to absorb the water flow entering the cover space 61. At the same time, a connecting hole 1210 connected to the external space is opened at a position away from the vent hole 120 on the installation position 121, and a circulating air channel is formed through the connecting hole 1210 and the vent hole 120, which is conducive to the volatilization of water.

[0044] In some extreme cases, the air permeable mesh 5 fails to block the impact of a large water flow, causing the water flow to enter the waterproof cover 6. Since the water flow entering is large, it may enter the cavity 10 of the earphone through the air hole 60 under the action of pressure. In order to avoid this situation, the present invention sets a sponge 7 in the cover space 61. The sponge 7 can be used for water absorption and ventilation. If the water flow enters the waterproof cover 6, it can be absorbed by the sponge 7, and the water flow is absorbed by the sponge 7, so that the water flow is prevented from entering the interior of the earphone through the air hole 60.

[0045] After testing, although the sponge 7 is set at the position of the air hole 120 of the earphone, it will restrict the flow of air, but it can reduce the vibration amount and strength of the low frequency, making the bass softer. At the same time, the sponge 7 can adjust the resonance frequency and slightly enhance the frequency of a specific low frequency band. At the same time, the sponge has the function of stabilizing the sound pressure balance inside and outside the cavity 10 of the earphone and improving the clarity of the sound quality. The sponge 7 can also absorb some high-frequency reflections to make the sound field more natural and soft.

[0046] When water flows into the waterproof cover 6, even if it is absorbed by the sponge 7, in order to quickly discharge the water absorbed by the sponge 7, the present invention provides a connecting hole 1210 connected to the external space at a position away from the vent 120 on the installation position 121. The aperture of the connecting hole 1210 is not larger than the aperture of the pore 60, and the water absorbed by the sponge 7 cannot be directly discharged through the through hole 1210. The function of the through hole 1210 is to form a circulatory air passage inside the cover space 61 formed by the waterproof cover 6. During the operation of the earphone, the temperature inside the earphone is usually higher than the external temperature, and the water absorbed by the sponge 7 will volatilize to a certain extent. The through hole 1210 and the vent 120 form a circulating air passage, which is conducive to the volatilization of water.

[0047] After testing, the present invention uses a 300-mesh ordinary mesh as the air permeable mesh 5 and the air hole 60 of the waterproof cover 6 has a diameter of 0.5 mm. The air permeable hole 120 of the earphone can fully achieve a waterproof effect under a strong water spray environment, and the waterproof level fully meets the IPX6 waterproof requirement. In a flooded environment or an environment with low water pressure, it can even reach the IPX7 waterproof requirement.

[0048] The present invention is not only used for earbud headphones, but also can be used for waterproofing the vent holes of other earphone products. Of course, the above is only a specific embodiment of the present invention, and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, features and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A waterproof structure for an earphone vent hole, comprising an earphone head (1) having a cavity (10) therein, and a speaker unit (3) installed in the cavity (10), wherein the head (1) is provided with a sound outlet hole (110) and an vent hole (120) which are connected to the cavity (10), the speaker unit (3) divides the cavity (10) into a front sound cavity (101) and a rear sound cavity (102), the sound outlet hole (110) is connected to the front sound cavity (101), and the vent hole (120) is connected to the rear sound cavity (102), and is characterized in that: A vent mesh (5) and a waterproof cover (6) are sequentially arranged at positions of the vent holes (120) on the inner wall of the cavity (10); a cover space (61) is formed in the waterproof cover (6); a plurality of vent holes (60) are provided on the waterproof cover (6); an edge of the waterproof cover (6) is sealedly connected to the inner wall of the cavity (10); and a sponge (7) for absorbing water and allowing air to pass through is arranged in the cover space (61); The cavity (10) passes through the air hole (60), the cover body space (61), the sponge (7), and the air permeable mesh (5) in sequence, and then communicates with the external space through the air permeable hole (120).

2. The waterproof structure of the earphone vent hole according to claim 1, characterized in that: The diameter of the pores (60) is less than 2.7 mm.

3. The waterproof structure of the earphone vent hole according to claim 1, characterized in that: The waterproof cover (6) is integrally formed using a silicone material.

4. The waterproof structure of the earphone vent hole according to claim 1, characterized in that: An installation position (121) is formed on the inner wall of the cavity (10) at a position corresponding to the air vent (120); the installation position (121) is a plane recessed in the inner wall of the cavity.

5. The waterproof structure of the earphone vent hole according to claim 4, characterized in that: A communication hole (1210) communicating with the external space is provided at a position on the installation position (121) away from the air vent (120).

6. The waterproof structure of the earphone vent hole according to claim 4, characterized in that: The vent mesh (5) has a bottom surface (51) that fits in plane with the mounting position (121), a hollow area corresponding to the vent holes (120) is formed in the middle area of ​​the bottom surface (51), and the mesh holes (50) on the vent mesh (5) are connected to the vent holes (120) through the hollow area; the open end of the waterproof cover (6) fits in plane with the mounting position (121) and is sealed and connected to the mounting position (121).

7. The waterproof structure of the earphone vent hole according to claim 4, characterized in that: A baffle is provided at the periphery of the installation position, and the baffle comprises: a left baffle (122), a right baffle (123) located at opposite sides of the installation position (121), and a rear baffle (124) located at the rear side of the installation position (121).

8. The waterproof structure of the earphone vent hole according to any one of claims 1 to 7, characterized in that: The earphone is an earbud-type earphone, wherein the earphone head (1) comprises a front cover (11) and a rear cover (12), wherein the rear cover (12) is fixed to the earphone stem (2); the sound outlet hole (110) is provided on the front cover (11), and the air vent hole (120) is provided on the rear cover (12).

9. A method for waterproofing the air vents of an earphone, comprising an earphone head (1) having a cavity (10) therein, and a speaker unit (3) installed in the cavity (10), wherein the head (1) is provided with a sound outlet hole (110) and an air vent (120) which are connected to the cavity (10), the speaker unit (3) divides the cavity (10) into a front sound cavity (101) and a rear sound cavity (102), the sound outlet hole (110) is connected to the front sound cavity (101), and the air vent (120) is connected to the rear sound cavity (102), and an air vent net (5) and a waterproof cover (6) are sequentially arranged at positions of the inner wall of the cavity (10) corresponding to the air vent (120), characterized in that: The waterproof method of the vent hole of the earphone is: First, a first waterproof structure is formed by the air-permeable mesh (5), which can block most of the water flow; Secondly, a second waterproof structure is formed by using a waterproof cover (6), wherein an air hole (60) communicating with the rear sound cavity (102) is provided on the waterproof cover (6), and the diameter of the air hole (60) is smaller than the capillary length of water; Finally, a sponge (7) is arranged in the cover body space (61), and the sponge (7) is used to absorb water flow entering the cover body space (61). A connecting hole (1210) that is connected to the external space is opened in the head (1), and a circulating air channel is formed through the connecting hole (1210) and the air vent (120).

10. A method for waterproofing the vent holes of earphones according to claim 9, characterized in that: The waterproof cover (6) is made of a hydrophobic silica gel material and is integrally formed; the diameter of the air hole (60) is less than 2.7 mm; and the diameter of the connecting hole (1210) is not greater than the diameter of the air hole (60).

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