Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Reexamination Certificate
2000-07-13
2003-04-01
Barnie, Rexford N. (Department: 2643)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Plural or compound reproducers
C381S370000
Reexamination Certificate
active
06542615
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a headphone, and more particularly to a headphone in which a hanger of a headband is stored in a headphone housing (which will be hereinafter referred to as a housing) and an opening between the headphone housing and the swinging headband is concealed by shielding means, thereby preventing foreign substances, dust and the like from entering the housing. Moreover, the acoustic characteristics of the headphone can be enhanced.
2. Description of the Related Art
FIG. 8
shows an example of a conventional headphone. In the headphone, a housing
21
having a built-in speaker unit is pivotally supported on an exterior type hanger
23
provided in a headband
22
. In this case, the headband
22
is attached to the top of a head portion and the housing
21
can be swung and adjusted in a driving direction by setting a pivot O in the longitudinal direction as the center of swinging. An operation for attaching the headphone has a problem in that attachment is hard to perform because fingers touch part of the hanger
23
when the housing
21
is held. Moreover, there is a problem in that the housing
21
supported swingably is unsteady and is attached with difficulty without pressing down the housing
21
while holding the hanger
23
.
FIG. 9
shows an example of another headphone of a conventional type. The headphone also has such a structure that a housing
24
including a speaker unit is supported pivotally by an exterior type hanger
26
provided in a headband
25
. In this case, the headband
22
is attached to a rear head portion and the housing
24
can be swung and adjusted in a twist direction by setting a pivot O in the vertical direction as the center of swinging. In this case, the headphone has a problem that if the headband
25
is to be spread in order to attach the headphone to the head portion by holding the housing
24
and the hanger
26
, the housing
24
is turned from a pivot portion so that attachment property is very deteriorated.
FIG. 10
shows a headphone of a conventional type in which a hanger
27
is stored in a housing
28
in place of the above-mentioned exterior type hanger. By the hanger of a storage type, it is possible to eliminate the problem that the housing is unsteady or turned when the headphone is to be attached.
A headphone having a hanger of a storage type has such a structure that an arm
30
of a headband
29
coupled to the hanger
27
is drawn from the housing
28
. In this case, the headband
29
is attached to the top of the head portion, and the housing
28
is provided with an opening
31
such that the housing
28
can be swung in the driving direction by setting the pivot O in the longitudinal direction as the center of swinging. However, since the opening
31
is formed on the housing
28
, there is a problem that foreign substances, dust and the like enter the housing
28
or fingers are caught between the opening
31
and the arm
30
during the driving adjustment of the housing
28
.
SUMMARY OF THE INVENTION
The present invention has been made to eliminate the above-mentioned problems and has an object to obtain a headphone capable of preventing foreign substances, dust and the like from entering a housing and of enhancing acoustic characteristics.
In order to attain the above-mentioned object, the present invention provides a headphone in which an opening formed in a coupling portion between a housing and a headband is concealed by shielding means.
According to the headphone having such a structure, the opening of the housing is always concealed by the shielding means. Therefore, foreign substances, dust and the like do not enter the housing. For example, if the shielding means shields the opening by means of a shielding plate extended from the hanger of the headband, the opening is always blocked by the shielding plate even in case the housing is swung in the driving direction or the twist direction. Consequently, it is possible to prevent the foreign substances, the dust and the like from entering the housing.
Moreover, the inside of the housing is divided by a partition wall and a speaker unit has a sealing structure. Consequently, the acoustic characteristics of a speaker can be enhanced.
REFERENCES:
patent: 4065645 (1977-12-01), Warner et al.
patent: 4138598 (1979-02-01), Cech
patent: 4542803 (1985-09-01), Houng
patent: 4588868 (1986-05-01), Bertagna et al.
patent: 4689822 (1987-08-01), Houng
patent: 4949806 (1990-08-01), Hofer
patent: 4965836 (1990-10-01), Andre et al.
patent: 5035005 (1991-07-01), Hung
patent: 5095382 (1992-03-01), Abe
patent: 5109424 (1992-04-01), Andre et al.
patent: 5117464 (1992-05-01), Jones et al.
patent: 5793878 (1998-08-01), Chang
patent: 5887286 (1999-03-01), Waldron
patent: 5970105 (1999-10-01), Leppalahti
Barnie Rexford N.
Dabney P.
Maioli Jay H.
Sony Corporation
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