1. Technical Field
The present disclosure generally relates to housing assemblies, and particularly to a housing assembly having excellent waterproof property and an electronic device using the housing assembly.
2. Description of Related Art
Electronic devices (such as mobile phones and personal digital assistants) include loudspeakers. Many loudspeakers have an IP67 (Ingress Protection Rating, 6 is a level of protection for solid, 7 is a level of protection for liquid) waterproof film attached to prevent water and/or oil from entering the loudspeaker. However, the IP67 waterproof film is not enough to prevent large amounts of water from penetrating the loudspeaker. Furthermore, the IP67 waterproof film has high acoustic impedance, which reduces a quality of the sound emitted by the loudspeaker.
Therefore, there is room for improvement within the art.
Many aspects of the disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The housing assembly 10 may be a rear cover, for example, of the electronic device 100. The electronic device 100 may further include a front cover (not shown) to match the housing assembly 10, and a battery (not shown) connected to the circuit board 20 to power the electronic device 100.
The housing assembly 10 includes an outer housing 11 and an inner housing 13 mounted to the outer housing 11. The outer housing 11 defines a plurality of first sound holes 111 and a plurality of second sound holes 113. The first sound holes 111 are defined at one end of the outer housing 11, while the second sound holes 113 are defined at another end of the outer housing 11. The first sound holes 111 and the second sound holes 113 allow the sounds emitted by the first loudspeaker 40 and the second loudspeaker 50, respectively to transmit to the outside of the housing assembly 10.
Also referring to
Referring to FIGS. 2 and 5-8, two first shoulders 138 protrude from two sidewalls of the first receiving chamber 131. The first shoulders 138 are positioned between the first sound holes 111 and the first loudspeaker 40. Two second shoulders 139 protrude from two sidewalls of the third receiving chamber 137. The second shoulders 139 are positioned between the second sound holes 113 and the second loudspeaker 50.
The circuit board 20 defines a first opening 21 at one end, and a second opening 23 at another end. The first opening 21 corresponds to the first receiving chamber 131 and the first sound holes 111, and the second opening 23 corresponds to the third receiving chamber 137 and the second sound holes 113. The first loudspeaker 40 is received in the first opening 21, and the second loudspeaker 50 is received in the second opening 23.
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The waterproof films 60 and 70 are made of synthetic resins or tarp (IP54, for example), which defines a plurality of micro-pores therein (not shown). The waterproof films 60 and 70 protect the loudspeakers 40 and 50 from damage by water, without reducing the quality of the sound. Since there are two waterproof films for each loudspeaker, the waterproof property of the loudspeakers 40 and 50 is enhanced. Even if water manages to penetrate the first waterproof films 60 to enter in the second cavity 63 and the fourth cavity 73, the water cannot penetrate the second waterproof films 70. Furthermore, when the first and second loudspeakers 40 and 50 are turned on, water in the second cavity 63 and the fourth cavity 73 is discharged out of the outer housing 11 by the vibration of the first and second loudspeakers 40 and 50.
During assembly of the electronic device 100, the circuit board 20 is mounted to the bottom wall 31 of the mounting member 30. The two mounting bases 41 are mounted on the bottom wall 31 of the mounting member 30 at a location corresponding to the first opening 21 and the second opening 23, respectively, and are electrically connected to the circuit board 20. The first loudspeaker 40 covered by one second waterproof film 70 and the second loudspeaker 50 covered by another second waterproof film 70 are respectively mounted to one of the mounting bases 41. One first waterproof film 60 is adhered to the first shoulders 138, and another first waterproof film 60 is adhered to the second shoulders 139. The inner housing 13 is engaged with the outer housing 11 to form the housing assembly 10. Then, the housing assembly 10 is engaged with the mounting member 30. As such, the first loudspeaker 40 is received in the first receiving chamber 131, and the second loudspeaker 50 is received in the third receiving chamber 137.
It is believed that the exemplary embodiment and its advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its advantages, the examples hereinbefore described merely being preferred or exemplary embodiment of the disclosure.
Number | Date | Country | Kind |
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102209544 | May 2013 | TW | national |