Protective cover for electronic device

Abstract

A cover for protecting an audio port of an electronic device is provided. The cover includes a check valve, a bellows, and an air vent. The check valve moves between a first position to allow audio pressure to exit the audio port and a second position to fluidly seal the audio port. The bellows at least partially surround the audio port when the cover is attached to the electronic device and move the check valve from the first position to the second position in response to a pressure exerted on the bellows. The air vent is attached to the bellows and allows audio pressure to pass through the air vent and to restrict passage of at least some water through the air vent.

Claims

1. A cover for protecting an audio port of an electronic device, the cover comprising: a check valve configured to move between a first position to allow audio pressure to exit the audio port when the cover is attached to the electronic device and a second position to fluidly seal the audio port when the cover is attached to the electronic device; a bellows configured to at least partially surround the audio port when the cover is attached to the electronic device and move the check valve from the first position to the second position in response to a pressure exerted on the bellows; and an air vent attached to the bellows, the air vent configured to allow the audio pressure to pass through the air vent and to restrict passage of at least some water through the air vent when the cover is attached to the electronic device, the air vent comprising a flexible, hydrophobic semi-permeable membrane configured to prevent the transfer of water across the membrane at a differential pressure across the membrane of less than 2 psi.

2. The cover according to claim 1, wherein the check valve is connected to and at least partially surrounded by the air vent, and wherein the air vent is connected to and at least partially surrounded by the bellows.

3. The cover according to claim 1, wherein the bellows are configured to fully surround the audio port.

4. The cover according to claim 1, wherein the bellows are configured to move the check valve about 1 mm in distance between the first position and the second position.

5. The cover according to claim 1, wherein the flexible, hydrophobic, semi-permeable membrane is configured to prevent the transfer of water across the membrane at a differential pressure across the membrane of about 0.5 psi to about 1 psi.

6. The cover according to claim 1, wherein the check valve is configured such that at least a portion of the check valve is positioned in the audio port when the check valve is in the second position.

7. The cover according to claim 1, wherein the cover is formed as a portion of a protective case configured to receive at least a portion of the electronic device.

8. The cover according to claim 1, wherein the air vent comprises an expanded non-woven acoustic vent material.

9. The cover according to claim 1, wherein the air vent comprises an expanded non-woven material selected from the group consisting of polytetrafluoroethylene, cellulose, polyester, polyolefin, polypropylene, and polyethylene terephthalate.

10. A cover for reversible fluidly sealing an audio port of an electronic device from an external environment, the cover comprising: a check valve movable between a first position defining a gap between the check valve and the audio port when the cover is attached to the electronic device and a second position configured to fluidly seal the audio port when the cover is attached to the electronic device; and an air vent at least partially surrounding the check valve, the air vent being formed from a flexible semi-permeable membrane configured to prevent the transfer of water across the membrane at a differential pressure across the membrane of less than 2 psi.

11. The cover according to claim 10, further comprising a bellows at least partially surrounding the check valve, the bellows and the air vent configured to permit movement of the check valve between the first position and the second position in response to an external pressure.

12. The cover according to claim 11, wherein the bellows at least partially surrounds the air vent, the bellows including a curved portion extending away from the audio port, the curved portion of the bellows biasing the check valve in the first position.

13. The cover according to claim 10, wherein the air vent is configured to allow audio pressure to pass through the air vent and to restrict passage of at least some water through the air vent when the cover is attached to the electronic device.

14. The cover according to claim 10, wherein the gap between the check valve and the audio port is about 1 mm or less when the check valve is in the first position.

15. The cover according to claim 10, wherein the check valve includes at least one angled edge configured to fluidly seal with a flared edge of the audio port when the check valve is in the second position.

16. A cover for protecting an audio port of an electronic device, the cover comprising: a seal configured to move between a first position to allow sound and/or audio pressure to exit the audio port when the cover is attached to the electronic device and a second position to fluidly seal the audio port when the cover is attached to the electronic device; a compressible material, the compressible material having a first uncompressed state and a second compressed state, the compressible material configured to change from the first uncompressed state to the second compressed state in response to being contacted by a water pressure thereby moving the seal from the first position to the second position; and an air vent attached to the compressible material, the air vent configured to allow the audio pressure to pass through the air vent and to restrict passage of at least some water through the air vent when the cover is attached to the electronic device, wherein the air vent comprises a flexible semi-permeable membrane configured to prevent the transfer of water across the membrane at a differential pressure across the membrane of less than 2 psi.

17. The cover of claim 16, wherein the compressible material at least partially surrounds the audio port.

18. The cover of claim 16, wherein the compressible material is positioned only on one side of the audio port.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 illustrates an electronic device positioned in a protective case;

(2) FIG. 2 illustrates an exemplary cover for an audio port;

(3) FIG. 3 illustrates an exploded view of the fluid seal of FIG. 2;

(4) FIG. 4 illustrates a cross-sectional view of the fluid seal of FIG. 2;

(5) FIG. 5A illustrates another exemplary fluid seal for an audio port in a first position;

(6) FIG. 5B illustrates the fluid seal of FIG. 5A in a second position;

(7) FIG. 6A illustrates still another exemplary fluid seal for an audio port in a first position;

(8) FIG. 6B illustrates the fluid seal of FIG. 6A in a second position;

(9) FIG. 7A illustrates yet another exemplary fluid seal for an audio port in a first position; and

(10) FIG. 7B illustrates the fluid seal of FIG. 7A in a second position.

DETAILED DESCRIPTION

(11) An exemplary electronic device 10 is illustrated in FIG. 1. Although a smartphone is illustrated, in other embodiments, electronic device 10 may be a tablet computer, a gaming device, an audio player, a video player, a fitness devise, a medical device, a camera, a portable computer, a two-way radio, a GPS receiver, and/or other portable devices. Electronic device 10 includes one or more audio ports 12, such as speaker ports 12A and 12B or microphone port 12C. Sound waves produced by a speaker (not shown) of electronic device 10 are transmitted to the user through one or more of speaker ports 12A, 12B. Sound waves from the user or environment are transmitted through microphone port 12C where they are received by a microphone (not shown) of electronic device 10.

(12) Electronic device 10 is illustratively positioned in a protective case 14. Protective case 14 is configured to protect at least a portion of electronic device 10 from various forms of damage, such as damage from one or more of dust, water, snow, dirt, and drops. Protective case 14 includes one or more apertures 16 positioned proximate to each audio port 12 to allow sound waves to travel between the audio port 12 and environment. Each audio port 12 is illustratively covered by a cover 20 as discussed in more detail below. As shown in FIG. 1, cover 20 is formed as a portion of protective case 14 and covers both audio port 12 and aperture 16. In other embodiments, cover 20 is not part of protective case 14 and may be a part of electronic device 10, such as a housing covering one or more internal components of the electronic device 10, to protect audio port 12 of electronic device 10.

(13) FIGS. 2-4 illustrate an exemplary cover 20. FIG. 2 illustrates a perspective view of cover 20. FIG. 3 illustrates an exploded view of cover 20. FIG. 4 illustrates a cross-sectional view of cover 20 covering an exemplary audio port 12. In FIG. 4, cover 20 is illustrated as being adhered directly to an outer surface of electronic device 10. In other embodiments, the cover 20 is adhered to a portion of protective case 14 proximate audio port 12.

(14) Cover 20 includes air vent 22, check valve 24, and bellows 26. Air vent 22 is illustratively attached to check valve 24 by first adhesive 28. Air vent 22 is illustratively attached to bellows 26 by second adhesive 30. Bellows 26 is illustratively attached to electronic device 10 by third adhesive 32. In another embodiment (not shown), bellows 26 is pressed against electronic device 10 by an external force, such as a protective case 14, to form a fluid seal between bellows 26 and electronic device 10.

(15) Referring to FIG. 4, a cavity 42 is formed between the cover 20 and audio port 12. As shown in FIG. 4, the cavity 42 is at least partially defined by the air vent 22, bellows 26, and surface of the electronic device 10. Cavity 42 is in fluid communication with the audio port 12 when the check valve 24 is in the first position as illustrated in FIG. 4.

(16) Air vent 22 is illustratively formed from a membrane that allows air pressure to pass through, while provides resistance to the passage of at least some fluid, such as water. Exemplary membranes include flexible, hydrophobic semi-permeable membranes, such as expanded non-woven acoustic vent materials formed from expanded polytetrafluoroethylene, cellulose, polyester, polyolefin, polypropylene, and/or polyethylene terephthalate. In some exemplary embodiments, air vent 22 is a membrane having a differential pressure across the membrane of about 2 psi or lower, about 1 psi or lower, or about 0.5 psi to about 1 psi. Air vent 22 allows air, such as sound waves, to pass through air vent 22 between audio port 12 and an external environment. The lower differential pressure of the membrane of air vent 22, compared to a typical membrane, corresponds to a less dense material, allowing for air to permeate air vent 22 and transmit sound with less loss and/or fewer audio issues such as double-talk, echo, feedback, and the like compared to a typical membrane.

(17) In some exemplary embodiments, the flexibility of air vent 22 allows for good audio performance, including minimizing unwanted echo and feedback. In some exemplary embodiments, air vent 22 provides at least some protection to audio port 12 from a fluid, such as water, and from dust. In more particular embodiments, air vent 22 resists water from a splash or incidental contact from passing through air vent 22. However, air vent 22 may not provide protection from a greater pressure of water, such as would occur during water immersion, where the difference between the external water pressure and trapped air in the cavity 42 between the air vent 22 and the audio port 12 exceeds the maximum differential pressure across the membrane, such as 2 psi, 1 psi, 0.5 psi, or lower.

(18) Bellows 26 is illustratively formed of a flexible material, such as a rubber. As illustrated in FIG. 4, outer portion 34 may be directly attached by third adhesive 32 to a portion of electronic device 10 proximate audio port 12. In other embodiments, outer portion 34 is attached to a portion of protective case 14 proximate audio port 12. Inner portion 36 is illustratively attached to air vent 22 by second adhesive 30. Middle portion 38 connects the outer portion 34 and inner portion 36. Middle portion 38 is configured to allow bellows 26 to flex between a first position, in which the check valve 24 is positioned above audio port 12, and a second position, in which the check valve 24 is positioned in contact with a portion of audio port 12 thereby fluidly sealing audio port 12 from the external environment.

(19) As illustrated in FIG. 4, in some embodiments, middle portion 38 includes a curved profiled to bias the check valve in the first position, in which sound can enter and exit audio port 12. In some exemplary embodiments, an external pressure, such as a pressure exerted by a fluid such as water on bellows 26, adhesive 36, and/or air vent 22, causes the bellows to move from the first position to the second position thereby fluidly sealing the audio port 12 from the external environment, and preventing air, water, dust, or other contaminates from the external environment to enter audio port 12. Exemplary pressures include pressure exerted due to a splash of water on bellows 26, adhesive 36, and/or air vent 22 or pressure exerted due to immersion of cover 20 in water. Upon release or removal of the external pressure, or upon equalization of the external pressure and the pressure in cavity 42, the bias in bellows 26 moves the check valve 24 back to the first position, as shown in FIG. 4.

(20) Check valve 24 is configured to fluidly seal audio port 12 from the external environment. In some exemplary embodiments, check valve 24 is formed from a thermoset or thermoplastic polymer, such as polyethylene terephthalate (PET). As discussed above, when check valve 24 is in a first position, air, including sound waves, can pass between audio port 12 and an environment outside cover 20 through air vent 22 and a gap formed between check valve 24 and a portion of audio port 12. In some exemplary embodiments, this gap is about 1 mm in height and extends around a lower angled edge 40 of check valve 24. Other suitable gap sizes may also be used.

(21) Check valve 24 allows for bi-directional passage of air, such as sound waves between an external environment and audio port 12, but is configured to move from the first position illustrated in FIG. 4 to a second position in which the check valve 24 fluidly seals the audio port 12 from the external environment.

(22) When cover 20 moves check valve 24 to the second position, the check valve 24 fluidly seals audio port 12 from the external environment so that a fluid, such as water, cannot pass from the environment into audio port 12. In some embodiments, check valve 24 includes an angled edge 40 configured to fluidly seal with a flared edge 18 of audio port 12. In other embodiments, check valve 24 includes a gasket or seal (see FIG. 5A) configured to contact a portion of electronic device 10 or case 14 proximate audio port 12 to fluidly seal audio port 12 from an external environment. In other embodiments (not shown), check valve 24 is configured to fluidly seal with a portion of protective case 14 proximate audio port 12. By providing a fluid seal to audio port 12 with check valve 24, cover 20 allows for a less restrictive material to be used for air vent 22. In some embodiments, this provides improved audio quality and/or volume compared to a fully-waterproof membrane while also providing protection for audio port 12 from immersion in water.

(23) Referring next to FIGS. 5A and 5B, a cross-sectional view of another exemplary cover 50 is illustrated. Cover 50 is similar to cover 20 and includes an air vent 22 that may be directly attached to a portion of electronic device 10 proximate an audio port 12 or attached to a portion of protective case 14 proximate audio port 12 to fluidly seal audio port 12 from water in an external environment. Air vent 22 is illustratively connected to a check valve 24. Check valve 24 includes a seal 52 around a bottom circumference of check valve 24 to contact a portion of electronic device 10 or case 14 proximate audio port 12 to fluidly seal audio port 12 from an external environment when the check valve 24 is in the second position, as shown in FIG. 5B.

(24) As shown in FIG. 5A, the air vent 22 is typically biased to position the check valve 24 in the first position, in which a gap below a lower end of check valve 24 allows for air, including sound waves, to be transmitted between audio port 12 and an external environment through air vent 22. In some exemplary embodiments, this gap is about 1 mm in height and extends around the seal 52 of check valve 24. Other suitable gap sizes may also be used.

(25) As illustrated in FIGS. 5A and 5B, cover 50 does not include a distinct bellows 26 (see FIG. 4), but rather the air vent 22 allows the check valve 24 to move between the first position illustrated in FIG. 5A and the second position illustrated in FIG. 5B.

(26) An external pressure, such as a pressure exerted by a fluid such as water on air vent 22, causes the check valve 24 to move from the first position to the second position as shown in FIG. 5B, thereby fluidly sealing the audio port 12 from the external environment. Exemplary pressures include pressure exerted due to a splash of water on air vent 22 or pressure exerted due to immersion of cover 50 in water. Upon release of the pressure, the bias in air vent 22 moves the check valve 24 back to the first position, as shown in FIG. 5A.

(27) Referring next to FIGS. 6A and 6B, a cross-sectional view of another exemplary cover 60 is illustrated. Cover 60 includes an air vent 22 attached to a compressible material 62 that may be directly attached to a portion of electronic device 10 proximate an audio port 12 or attached to a portion of protective case 14 proximate audio port 12 to fluidly seal audio port 12 from water in an external environment. Air vent 22 is illustratively connected to a check valve 24. Compressible material 62 is a material that reduces in size upon application of a pressure, such as upon contact with water. Exemplary compressible materials include microcellular urethanes such as PORON products available from Rogers Corporation, Rogers Conn.

(28) As shown in FIG. 6A, the compressible materials 62 are typically biased to position the check valve 24 in the first position, in which a gap below a lower end of check valve 24 allows for air, including sound waves, to be transmitted between audio port 12 and an external environment through air vent 22. In some exemplary embodiments, this gap is about 1 mm in height. Other suitable gap sizes may also be used. Upon contact with water, compressible materials 62 reduce in volume, which causes the check valve 24 to move from the first position to the second position as shown in FIG. 6B, thereby fluidly sealing the audio port 12 from the external environment. Upon removal of the water, the compressible materials 62 increase in volume, which moves the check valve 24 back to the first position, as shown in FIG. 6A.

(29) Referring next to FIGS. 7A and 7B, a cross-sectional view of another exemplary cover 64 is illustrated. Cover 64 is similar to cover 60, but includes compressible material 62 on only one side of audio port 12. As shown in FIG. 7A, the compressible material 62 are typically biased to position the check valve 24 in the first position, in which a gap below a lower end of check valve 24 allows for air, including sound waves, to be transmitted between audio port 12 and an external environment through air vent 22. In some exemplary embodiments, this gap is about 1 mm in height. Other suitable gap sizes may also be used. Upon application of a pressure from a contact with water, compressible material 62 reduces in volume, which causes the check valve 24 to move from the first position to the second position as shown in FIG. 7B, thereby fluidly sealing the audio port 12 from the external environment. Upon removal of the water, the compressible materials 62 increase in volume, which moves the check valve 24 back to the first position, as shown in FIG. 7A. In some exemplary embodiments, an air vent 22 may extend to the surface of the electronic device 10 to prevent water from a splash from entering audio port 12.

(30) The elements, components, and steps described herein are meant to exemplify some types of possibilities. In no way should the aforementioned examples limit the scope of the invention, as they are only exemplary embodiments.

(31) The phrases in some embodiments, according to some embodiments, in the embodiments shown, in other embodiments, in some examples, in other examples, in some cases, in some situations, in one configuration, in another configuration, and the like generally mean that the particular technique, feature, structure, or characteristic following the phrase is included in at least one embodiment of the present invention and/or may be included in more than one embodiment of the present invention. In addition, such phrases do not necessarily refer to the same embodiments or to different embodiments.

(32) The foregoing disclosure has been presented for purposes of illustration and description. Other modifications and variations of the disclosed techniques may be possible in view of the above teachings. The embodiments described in the foregoing disclosure were chosen to explain the principles of the concept and its practical application to enable others skilled in the art to best utilize the invention. It is intended that the claims be construed to include other alternative embodiments of the invention, except as limited by the prior art.