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    • 8. 发明公开
    • Earbud and method of manufacture
    • 韦尔法罕zur Herstellung einesOhrstückes
    • EP1956864A1
    • 2008-08-13
    • EP08250402.8
    • 2008-02-04
    • Sperian Hearing Protection LLC
    • Tiemens, JimGilder, Stephen D.
    • H04R1/10
    • B29C44/1214B29C44/351H04R1/1016H04R1/1058Y10T29/4957Y10T29/49572
    • An earbud (10) for carrying sound from a source (16) to a person's ear canal, includes a soft foam body (20) and a sleeve (26) of stiffer material lying within the body. The body is molded around the sleeve and is chernically bonded to the sleeve without an adhesive between them. The earbud is molded around the sleeve by placing the sleeve on a mandrel pin (42) within a mold cavity (32), placing foamable material in the mold and closing the mold. The mold has shoulders with one mold shoulder (52) that abuts one end (46) of the sleeve and another mold shoulder (60) that lies within 0.1 millimeter of the other sleeve end (62), to prevent foaming material from leaking into the space (64) between the mandrel pin and the sleeve passage.
    • 用于将声音从源(16)携带到人的耳道的耳塞(10)包括柔软的泡沫体(20)和位于身体内的更硬的材料的套筒(26)。 身体围绕套筒模制,并且在它们之间没有粘合剂被切割地粘合到套筒上。 耳套通过将套筒放置在模腔(32)内的心轴销(42)上而围绕套筒模制,将可发泡材料放置在模具中并闭合模具。 模具具有一个肩部(52),该模具肩部(52)邻接套筒的一端(46)和位于另一套筒端部(62)的0.1毫米内的另一个模具肩部(60),以防止发泡材料泄漏到 心轴销和套筒通道之间的空间(64)。