1. Technical Field
The present disclosure generally relates to earphones, and particularly, to an earphone formed by ultrasonic fusion.
2. Description of the Related Art
An earphone includes an earphone housing, a speaker positioned in the earphone housing, and an earphone cable electrically connected to the speaker. The earphone housing includes a front housing and a back housing glued/engaged to the front housing. However, if the back housing is glued to the front housing, the back housing is easily separated from the front housing due to having low bonding strength between the back housing and the front housing. Meanwhile, if the back housing is engaged to the front housing, the back housing and the front housing require the machining of a special engaging structure, and thus manufacturing costs of the earphone is thereby increased.
Therefore, there is room for improvement within the art.
The components in the drawings are not necessarily drawn to scale, the emphasis instead placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
Referring to
Referring to
Referring to
The ultrasonic fusion device 40 includes a positioning frame 41 and a fusing head 43. The positioning frame 41 defines a positioning groove (not labeled) in a top surface thereof. The second housing 23 is disposed in the positioning groove of the positioning frame 41, and the second connecting surface 233 is above the positioning frame 41. The fusing head 43 may also define an assembly groove (not labeled) for partially receiving the first housing 21.
Referring to
Referring to
Referring to
In a step S2, the first housing 21 is fused to the second housing 23 by the ultrasonic fusion device 40. In the illustrated embodiment, the second housing 23 is positioned in the positioning frame 41, and the first housing 21 is positioned on the second housing 23 to seal the speaker 90, with the first connecting surface 213 abutting the second connecting surface 233. The fusing head 43 presses on the first housing 21, and fuses the first housing 21 and the second housing 23 together to form the earphone housing 20. A fusing line 24 is formed between the first housing 21 and the second housing 23 after fusing, and an amount of excess plastic is formed to be arranged along the fusing line 24.
In a step S3, the excess plastic of the earphone housing 20 is removed by the cutter 50. In the illustrated embodiment, the earphone housing 20 is rotated, and the cutter 50 is moved along the fusing line 24 to remove the excess plastic.
In a step S4, the earphone housing 20 is ground by the grinding device 60. In the illustrated embodiment, the grinding surface 601 of the grinding device 60 touches the side surface of the earphone housing 20. The earphone housing 20 is rotated clockwise, and the grinding device 60 is rotated counterclockwise along the fusing line 24.
Referring to
The positioning of the soft plastic piece 75 between the first housing 71 and the second housing 73, while the fusing head 43 applies a pressing force on the first housing 21, alleviates and spreads the pressing force between the first housing 71 and the second housing 73 during ultrasonic fusion. Therefore, the first housing 71 and the second housing 73 can be more accurately fused together. Furthermore, the earphone 200 having the soft plastic piece 75 is less rigid, and thus users obtain a comfortable feeling from the additional resiliency of the earphone housing 200.
Referring to
While the present disclosure has been described with reference to particular embodiments, the description is illustrative of the disclosure and is not to be construed as limiting the disclosure. Therefore, various modifications can be made to the embodiments by those of ordinary skill in the art without departing from the true spirit and scope of the disclosure, as defined by the appended claims.
Number | Date | Country | Kind |
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2011 1 0221959 | Aug 2011 | CN | national |
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20130034259 A1 | Feb 2013 | US |