JP3778999B2 - Headphone device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a pair of unit housing portions incorporating a speaker unit, a headband that connects these unit housing portions to each other, and an auxiliary band portion that is installed near the connection between the unit housing portions on both sides and the headband. This relates to a headphone device.
[0002]
[Prior art]
In the headphone device according to the conventional example 1, a pair of housing portions incorporating a speaker unit are connected by a headband, and the head is sandwiched and held by the headband. This headband is made of a metal plate such as stainless steel or a wire such as a piano wire that is curved in an arc shape to give springiness. The head is clamped and held using its elastic force, and the unit housing part is It is pressed against the ear.
[0003]
However, these headphone devices have individual differences in the distance from the top of the head to each pinna, so it is necessary to adjust the length of the headband in order to set the unit housing to the optimum position. Adjustment was complicated and troublesome.
[0004]
In the headphone device disclosed in Japanese Patent Laid-Open No. 7-46684 as Conventional Example 2, instead of adjusting the length of the headband, it automatically responds to individual differences in the distance from the top of the head to each pinna. It has a function. In the vicinity of the connection between the headband and the unit housing portion, there is provided a suspender member attached and supported at both ends, and this suspender member is formed by integrally connecting an extendable portion and a non-expandable portion.
[0005]
[Problems to be solved by the invention]
However, the headphone device according to the conventional example 2 has a problem that it is difficult to adjust to the head when starting to hang because the suspender member is substantially horizontal. In addition, the expansion / contraction of the expansion / contraction part is not necessarily the same length from the center to the both sides. Further, since the tensile stress starts from zero, there is play, and there is a problem that the tensile stress is too weak when the elongation is small.
[0006]
The present invention has been made in view of the above points, and instead of adjusting the length of the headband, the function of automatically dealing with individual differences in the distance from the top of the head to each pinna is an arc shape. It is an object of the present invention to provide a headphone device provided with an auxiliary band portion that is formed in a curved shape and whose expansion and contraction is symmetric with respect to the center and in which an initial tensile stress can be set to an appropriate value.
[0007]
[Means for Solving the Problems]
The present invention is constructed such that a pair of unit housing parts 4 incorporating speaker units, a headband 2 for connecting these unit housing parts 4 to each other, and the vicinity of the connection between the unit housing parts 4 and the headband 2 on both sides. In the headphone device including the auxiliary band portion 3, the auxiliary band portion 3 includes a band case 7 including upper and lower band cases 7 a and 7 b that are curved in an arc shape so as to substantially match the head shape, The upper band case 7a has a rack portion 11, recesses for accommodating the left and right sub-bands 9a, 9b made of a flexible material are formed, and openings are formed on both sides. A convex portion 15 functioning as a stopper is formed on the side wall in the vicinity of the opening and forming the concave portion, and an annular pin is formed in the central portion of the upper band case 7a. The pin 10 is provided with a coil spring 8 that applies a predetermined tensile stress to the pinion 10 in advance, and the left and right subbands 9a housed in the upper band case 7a, 9b is formed with a rack portion 11 on one inner side and a stepped cutout portion 13 that can contact the convex portion 15 on the outer side. Each rack portion 11 formed on the left and right subbands 9a and 9b The pinion 10 meshes with the pinion 10 to be movable, and the other end portions of the left and right sub-bands 9a and 9b protrude outside through the opening and are connected to the headband 2.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the headphone device of the present invention , a coil spring and a pinion are installed in the center of the band case, and a rack portion of a set of subbands is installed so as to mesh with the pinion. In order to apply a certain tensile stress to the pinion in advance, the coil spring is displaced by a certain angle. The sub-band is given a certain restoring force even when the extension is zero, and there is no play, and the sub-band is extended and contracted smoothly symmetrically. In addition, coil springs having different elastic forces can be used during assembly, and auxiliary band portions suitable for various applications can be manufactured. Since this band case is curved and formed in an arc shape so as to substantially match the head shape, it is well adapted to the head from the beginning. In order to make a pair of subbands curved like the band case, the shape of the rack portion of the pinion and the subband becomes complicated, and it becomes very difficult to manufacture a mold for molding a part. In the present application, the material of the pair of sub-bands has flexibility and toughness, and is formed in a flat plate shape. Therefore, the sub-band material is drawn out of the bandose while adapting to the curvature of the band case, and is smoothly expanded and contracted.
[0009]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view of a headphone device according to an embodiment of the present invention. In the figure, 1 is a headphone device according to the present invention, 2 is a headband, 3 is an auxiliary band unit having a function that automatically corresponds to individual differences in distance from the top of the head to each pinna, and 4 has a built-in speaker unit. The unit housing portion 5 is an ear pad, and 6 is a connecting portion for connecting the auxiliary band portion 3 to the headband 2.
[0010]
FIG. 2 is an exploded perspective view in which the auxiliary band portion of the headphone device according to the embodiment of the present invention is disassembled. In the figure, reference numeral 7 denotes a band case made up of an upper band case 7a and a lower band case 7b . As shown in the figure, recesses for accommodating the left and right sub-bands 9a, 9b are formed. The upper band case 7a is provided with a locking portion 14 and a convex portion 15. Although it is a flat schematic diagram in the figure, it is actually curved in an arc shape so as to substantially match the head shape, and in the drawing, both end sides of the band case 7 are upward and the central portion is downward. Will be curved. 8 is an elastic coil spring, 9 is a sub-band comprising a left sub-band 9a and a right sub-band 9b , a rack portion 11 is formed inside one end , and a step-shaped notch portion 13 is provided in the belt- like portion 12. ing. As the material of the subband 9, a material having flexibility and toughness such as thermoplastic polyester / elastomer and nylon is selected.
[0011]
Next, assembly and operation will be described. A pinion 10 and a coil spring 8 that are rotatable via a shaft are installed in the center of the upper band case 7a. One end on the outside of the coil spring 8 is locked to the locking portion 14, and one end inside is fixed to the pinion 10. Subsequently, in order to apply a certain tensile stress to the pinion 10 in advance, the pinion 10 is rotated by a certain angle so as to be fitted in a normal track. The rack portion 11 of the subband 9 is installed so as to mesh with the pinion 10. At this time, the other end side of the band-like portion 12 of the sub-band 9 is installed so as to protrude outside from the openings provided on both sides of the upper band case 7a . The projection 15 formed on the side walls forming a recess there at the opening near the stepped notch portion 13 and the upper band case 7a subbands 9 abuts the convex portion 15 functions as a stopper of the sub-band 9. After the coil spring 8, the pinion 10, and the subband 9 are installed in the upper band case 7a, the lower band case 7b is covered. The assembled auxiliary band portion 3 is repeatedly attached up and down and attached to the connecting portion 6 of the headband 2 by a known method.
[0012]
【The invention's effect】
As described above, in the present invention, the auxiliary band portion is composed of a band case composed of upper and lower band cases, a coil spring, a pinion, and a set of subbands provided with a rack. Since it is curved and formed in an arc shape so as to substantially match the head shape, it is well adapted to the head from the beginning.
Further, since a set of sub-band is made materials or al forms having flexible properties, being drawn out of the band case while familiar to the curvature of the band case, the contraction smooth elongation. Moreover, there is an advantage that a complicated and precise mold is not required.
Furthermore, since a certain tensile stress is applied to the pinion in advance, there is no play and smooth expansion and contraction is achieved symmetrically.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of a headphone device according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view in which an auxiliary band portion of the headphone device according to the embodiment of the present invention is disassembled.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Headphone apparatus 2 Headband 3 Auxiliary band part 4 Unit housing part 5 Ear pad 6 Connection part 7 Band case 7a Upper band case 7b Lower band case 8 Coil spring 9 Subband 9a Left subband 9b Right subband b
DESCRIPTION OF SYMBOLS 10 Pinion 11 Rack part 12 Strip | belt-shaped part 13 Notch part 14 Locking part 15 Convex part

Claims (1)

A pair of unit housing parts (4) incorporating a speaker unit, a headband (2) for connecting these unit housing parts (4) to each other, and connection between the unit housing parts (4) and the headband (2) on both sides In the headphone device provided with the auxiliary band part (3) installed in the vicinity of
The auxiliary band part (3) is composed of a band case (7) consisting of upper and lower band cases (7a, 7b) curved in an arc shape so as to substantially match the head shape ,
The upper band case (7a) has a rack portion (11), a recess for accommodating the left and right sub-bands (9a, 9b) made of a flexible material is formed, and openings are formed on both sides. In addition, a convex portion (15) functioning as a stopper is formed on the side wall forming the concave portion in the vicinity of the opening, and the annular pinion 10 is rotatable at the central portion of the upper band case (7a). A coil spring (8) that applies a predetermined tensile stress to the pinion 10 in advance is provided inside the pinion 10.
The left and right sub-bands (9a, 9b) housed in the upper band case (7a) are formed with a rack portion (11) on one inner side and a stepped shape that can come into contact with the convex portion (15) on the outer side. A notch (13) is formed,
Each rack part (11) formed in the left and right subbands (9a, 9b) meshes with the pinion (10) and is movable, and the other end part of the left and right subbands (9a, 9b) is the opening part. A headphone device that protrudes to the outside via the headband and is connected to the headband (2).

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