JPH1023586A - Headphone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a function which can cope with individual differences automatically since the length of a head band needs to be adjusted in order to set unit housing parts at optimum positions because the headphone device has the individual difference in the distance from a head top part to each ear. SOLUTION: The headphone device consists of the head band 2, an auxiliary band part 3 having a function which corresponds to the individual difference in the distance from the head top part to each ear automatically, the unit housing parts 4 which contain speaker units, ear pads 5, connection parts 6, etc. The auxiliary band part 3 which is coupled with the head band 2 is made freely expandable and shrinkable by providing a spring material for a restoring force for an interlocking mechanism consisting of a rack and a pinion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pair of unit housing sections each containing a speaker unit, a headband connecting these unit housing sections to each other, and a bridge installed near the connection between the unit housing sections and the headband on both sides. And a headphone device comprising an auxiliary band portion.

[0002]

2. Description of the Related Art In a headphone device according to a prior art example 1, a pair of housing sections each containing a speaker unit are connected by a headband, and the head is held 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 curved in an arc shape to give a spring property. The ear is pressed and held.

However, in these headphone devices, since the distance from the crown to each auricle varies from person to person, it is necessary to adjust the length of the headband in order to set the unit housing at the optimum position. Yes, this adjustment was complicated and troublesome.

In the headphone device disclosed in Japanese Patent Application Laid-Open No. 7-46684 as Conventional Example 2, instead of adjusting the length of the headband, individual differences in the distance from the crown to each auricle are automatically determined. It has a function corresponding to. In the vicinity of the connection between the headband and the unit housing portion, a suspender member having both ends attached and supported is provided, and the suspender member has a stretchable portion and a non-stretchable portion integrally connected to each other.

[0005]

However, the headphone device according to the prior art 2 has a problem that the suspender member is substantially horizontal, so that it is difficult for the headphone device to fit into the head when the user starts putting on. In addition, the expansion and contraction of the expansion and contraction portion is not always exactly the same length from the center to both sides, and there is a problem in that the expansion and contraction may be biased to one side, so that it is biased when hanging. Furthermore, since the tensile stress also starts from zero, there is a problem that there is play, and when the elongation is small, the tensile stress is too weak.

[0006] The present invention has been made in view of such a point, and instead of adjusting the length of the headband, as a function to automatically respond to individual differences in the distance from the crown to each auricle. It is an object of the present invention to provide a headphone device having an auxiliary band portion which is formed in a curved shape in an arc shape, has expansion and contraction symmetrical with respect to the center, and can set an initial tensile stress to an appropriate value.

[0007]

A coil spring and a pinion are installed in the center of the band case, and a set of sub-band racks is installed so as to mesh with the pinion. In order to apply a predetermined tensile stress to the pinion in advance, the coil spring is displaced by a predetermined angle. The sub-band is provided with a constant restoring force even when the elongation is zero, has no play, and has a symmetrical smooth expansion / contraction. In addition, coil springs having different elastic forces can be used when assembling, and an auxiliary band portion suitable for various uses can be manufactured. Since this band case is curved in an arc shape so as to conform to the substantially head shape, it fits well into the head from the beginning. In order to make one set of sub-bands curved like a band case, the shape of the pinion and the rack portion of the sub-band becomes complicated, and it becomes very difficult to manufacture a mold for molding parts. In the present application, a material of a set of sub-bands is provided with flexibility and toughness, and is formed in a flat plate shape, so that the sub-band is drawn out of the bandose while conforming to the curve of the band case, and smoothly expanded and contracted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A headphone device according to the present invention comprises a pair of unit housing sections each containing a speaker unit, a headband connecting these unit housing sections to each other, and a connection between the unit housing sections on both sides and the headband. In a headphone device including an auxiliary band portion installed in the vicinity, the auxiliary band portion includes a band case including upper and lower band cases, a coil spring, a pinion, and a set of subbands including a rack portion. The band case is characterized in that it is curved in an arc shape so as to conform to a substantially head shape.

Further, the headphone device of the present invention is characterized in that one set of sub-bands is formed in a flat plate shape from a material having flexibility and toughness. Further, the headphone device of the present invention is characterized in that the coil spring is arranged so as to apply a predetermined tensile stress to the pinion in advance.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial 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 automatically corresponding to individual differences in the distance from the crown to each auricle, and 4 has a built-in speaker unit. Reference numeral 5 denotes an earpad, and reference numeral 6 denotes a connecting portion for connecting the auxiliary band portion 3 to the headband 2.

FIG. 2 is an exploded perspective view of the headphone device according to the embodiment of the present invention, in which an auxiliary band portion is exploded. In the figure, reference numeral 7 denotes a band case composed of an upper band case 7a and a lower band case 7b.
a is provided with a locking portion 14 and a convex portion 15. Although the figure is a flat schematic view, it is actually formed in an arc shape so as to substantially conform to the head shape, and both ends of the band case 7 are upward and the central part is downward in the drawing. It will be curved. 8 is a resilient coil spring,
Reference numeral 9 denotes a sub-band composed of a left sub-band 9a and a right sub-band 9b, and includes a rack portion 11, a band portion 12, and a notch portion 13.
Is provided. As the material of the sub-band 9, a material having flexibility and toughness such as thermoplastic polyester elastomer and nylon is selected.

Next, the assembly and operation will be described. The pinion 10 and the coil spring 8 are installed at the center of the upper band case 7a. One end on the outside of the coil spring 8 is locked by the locking portion 14, and one end on the inside is fixed to the pinion 10. Subsequently, the pinion 10 is rotated by a predetermined angle in order to apply a predetermined tensile stress to the pinion 10 in advance, so that the pinion 10 is fitted into a regular track. The rack 11 of the sub-band 9 is installed so as to mesh with the pinion 10. At this time, subband 9
Of the belt-like portion 12 is protruded from the openings provided on both sides of the upper band case. Notch 13 of sub band 9 and upper band case 7
The convex portion 15 of a abuts and functions as a stopper for the sub-band 9. After the coil spring 8, the pinion 10, and the sub-band 9 are installed on the upper band case 7a, the lower band case 7b is closed. The assembled auxiliary band portion 3 is attached to the connecting portion 6 of the headband 2 by a known method by repeatedly turning up and down.

[0013]

As described above, in the present invention, the auxiliary band portion is constituted by a band case composed of upper and lower band cases, a coil spring, a pinion, and a set of sub-bands provided with a rack. Since the band case is curved and formed in an arc shape so as to match the approximate head shape,
From the beginning it fits well into the head. Also, 1
Since the set of sub-bands is formed in a flat plate shape from a material having flexibility and toughness, the sub-bands are pulled out of the band case while conforming to the curve of the band case, and smoothly expanded and contracted. In addition, there is an advantage that a complicated and precise mold is not required. Furthermore, since a fixed tensile stress is applied to the pinion in advance, there is no play, and the expansion and contraction is symmetrical and smooth.

[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 exploded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Headphone apparatus 2 Headband 3 Auxiliary band part 4 Unit housing part 5 Ear pad 6 Connecting part 7 Band case 7a Upper band case 7b Lower band case 8 Coil spring 9 Subband 9a Left subband 9b Right subband b 10 Pinion 11 Rack part 12 belt-shaped part 13 notch part 14 locking part 15 convex part

Claims (3)

[Claims] 1. A pair of unit housing sections each containing a speaker unit, a headband connecting these unit housing sections to each other, and an auxiliary band section installed near the connection between the unit housing sections and the headband on both sides. In the headphone device, the auxiliary band portion includes a band case including upper and lower band cases, a coil spring, a pinion, and a set of sub-bands provided with a rack portion. A headphone device characterized in that it is curved in an arc shape so as to conform to a substantially head shape. 2. The headphone device according to claim 1, wherein said one set of sub-bands is formed in a flat plate shape from a material having flexibility and toughness. 3. The headphone device according to claim 2, wherein said coil spring is arranged so as to apply a predetermined tensile stress to said pinion in advance.