Earplug cover and earphone

Abstract

The invention provides an earplug cover and an earphone, and in a manufacturing process, when the earplug cover is installed on an earpiece part, a filter part does not fall off and the assembly has good operability. The earplug comprises a base part with a through hole and an annular shape, and a filter part with a filter bracket and a filter; the filter bracket comprises a bottom provided with a opening part, and a peripheral wall part, and the filter is installed to cover the opening part. In an installed state that the through hole is installed on the earpiece part, the through hole comprises, in turn, from the housing side: a first engaging part which protrudes inwards and has a minimum distance between a fore end surface and the axis of the base part as a first distance; a second engaging part which has a peripheral surface, wherein a minimum distance between the surface and the axis is a second distance longer than the first distance; and a third engaging part which is formed continuously to the second engaging part and has a peripheral surface, wherein a minimum distance between the surface and the axis is longer than the second distance. The filter part is held in a manner that the peripheral wall part is engaged with the third engaging part and the bottom is located at the opposite side to the second engaging part.

Description

technical field [0001] The present invention relates to an earplug cover and an earphone, in particular to an earplug cover mounted on an earpiece part protruding from the earphone body and inserted into the external auditory canal together with the earpiece part, and an earphone equipped with the earphone cover. Background technique [0002] Earphones of the so-called ear canal type are widely used in which an earpiece is detachably attached to an earpiece protruding from the main body of the earphone, and the earpiece is inserted into the external auditory canal together with the earpiece. [0003] Two types of ear canal earphones are known: a type in which the speaker unit is housed inside the main body (hereinafter referred to as unit storage type) and a type in which the speaker unit is attached to the front end of the barrel (hereinafter referred to as top mount type). [0004] With regard to the unit storage type, Patent Document 1 describes an earphone having a struc...

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Problems solved by technology

[0008] In addition, the earplug cover is usually formed of a rubber material such as silicon rubber. Therefore, the earphone described in Patent Document 1 may be difficult to fully utilize the double-sided surface in a low-temperature environment or due to dust adhering to the attachment surface during the attachment operation. Adhesion of the tape, the possibility of the filter part falling off cannot be ruled out

[0009] In addition, in the manufacturing process of earphones, in the operation of attaching the earphone cover to the earpiece after the ring-shaped filter component is fitted into the large-diameter space part, the earphone cover is greatly deformed, so there is a problem due to the deformation of the filter part. Possibility of shifting or detachment from the intended position, there is room for improvement in assembly workability

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