JP3948880B2 - Headphone - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a headphone for converting sound output of an audio device into sound, and particularly to a headphone configured by arranging a pair of left and right earphones at both ends of a headband.
[0002]
[Prior art]
In conventional headphones, by wearing a headband on the head, a pair of left and right earphones covers both ears, and music can be heard at an appropriate volume without leaking sound to the outside.
[0003]
[Problems to be solved by the invention]
However, with conventional headphones, only one person wearing the headphones can enjoy music, and multiple people cannot enjoy common music.
Therefore, an object of the present invention is to provide a headphone that allows a plurality of persons to enjoy common music.
[0004]
[Means for solving the problems]
A headphone according to the present invention is configured by arranging a pair of left and right earphones (2) and (3) at both ends of a headband (1), and both earphones (2) and (3) are passed through an amplifier circuit (6). An audio signal is supplied.
In the headphones, both earphones (2) and (3) are pivotally supported at the ends of the headband (1), and both earphones (2) and (3) are mounted with the headband (1) attached to the head. It is possible to selectively set either one of the first posture that covers both ears and the second posture rotated by a predetermined angle from the first posture.
At least one of the earphones and the headband (1) is attached with a posture detecting means that switches in conjunction with a change in the posture of the earphone , and at least one of the earphones has an ear. State detecting means for switching by covering is provided.
When the first attitude is detected by the attitude detection means, the gain of the amplifier circuit (6) is set to a first value, the second attitude is detected by the attitude detection means, and Only when it is detected by the state detection means that the earphone does not cover the ear, the gain of the amplifier circuit (6) is set to a second value larger than the first value.
[0005]
The first value of the gain has such a magnitude that an appropriate sound volume can be obtained with a pair of left and right earphones (2) and (3) being applied to the ear, and the second value is The pair of earphones (2) and (3) have such a size that an appropriate sound volume can be obtained with the earphones (2) and (3) sufficiently separated from the ears.
Further, each of the attitude detection means and the state detection means can be constituted by a known on / off switch or the like.
[0006]
According to the headphones of the present invention, when enjoying music alone, the pair of left and right earphones (2) and (3) are set to the first posture. As a result, the posture detection means is switched, the setting of the first posture is detected, and the gain of the amplifier circuit (6) is set to the first value. By wearing the headband (1) on the head, the left and right earphones (2) and (3) cover the left and right ears, thereby switching the state detection means. In this state, sound is emitted from both earphones (2) and (3) at a small volume.
Therefore, a listener wearing headphones can listen to music at an appropriate volume.
[0007]
On the other hand, when enjoying music shared by a plurality of people, the pair of left and right earphones (2) and (3) are switched from the first posture to the second posture and placed near the plurality of listeners. In conjunction with this change in posture, the posture detection means is switched, and the setting of the second posture is detected. Further, it is detected by the state detection means that the earphone does not cover the ear. As a result, the gain of the amplifier circuit (6) is set to the second value. As a result, sound is emitted from both earphones (2) and (3) at a large volume.
Therefore, a plurality of listeners can enjoy common music at an appropriate volume.
Moreover, even if one of the earphones touches the earphone in the state where the earphones ( 2 ) and ( 3 ) are set to the second posture in order to enjoy music by a plurality of people , this state is the state detection means. The gain of the amplifier circuit ( 6 ) is forcibly switched to the first value. Therefore, there is no fear that a sound with a large volume will enter the ear directly, and it is safe.
[0008]
Specifically, the second posture of the pair of left and right earphones (2) and (3) is rotated from the first posture by an angle (for example, approximately 90 °) toward the outside of the headband (1). Set to posture.
As a result, the pair of left and right earphones (2) and (3) are directed in substantially the same direction in the second posture, and sound can be emitted toward many listeners in the vicinity.
[0009]
In a more specific configuration, the posture detecting means is attached to each of the connecting portions of the headband (1) and the pair of left and right earphones (2) and (3). Only when the posture is detected, the gain of the amplifier circuit (6) is set to the second value.
According to the specific configuration, even if any one of the posture detection means detects the second posture due to a defective wearing state of the headphones, the other posture detection means detects the first posture. Therefore, the gain of the amplifier circuit (6) is not set to the second value. Therefore, there is no possibility that a loud sound will be emitted from the earphones (2) and (3) in the state where the headphones are worn, and it is safe.
[0011]
【The invention's effect】
According to the headphones according to the present invention, not only one person but also a plurality of persons can enjoy common music, which is convenient.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
In the headphones according to the present invention, as shown in FIGS. 1 and 2, a pair of left and right earphones (2) and (3) are attached to both ends of an arched headband (1) made of an elastic member. ) Is connected to be able to rotate in the same direction as the elastic direction, and is the first to enjoy music by wearing a headband (1) on the head and putting a pair of left and right earphones (2) (3) on the ear. And the second posture (Fig. 2) for enjoying music emitted from both earphones (2) and (3) without wearing the headband (1) on the head. Any one of the postures can be selectively set.
The left earphone (2) includes a left channel speaker (4), and the right earphone (3) includes a right channel speaker (5).
[0013]
A well-known pivot mechanism (not shown) is provided at the connecting portion between the headband (1) and both earphones (2) and (3). Earphones (2) and (3) are connected to each pivot mechanism. A known soft locking mechanism (not shown) for soft locking in each of the first posture shown in FIG. 1 and the second posture shown in FIG. 2 is incorporated.
[0014]
Further, at both ends of the headband (1), there are provided first and second switches SW1 and SW2 which are switched in accordance with a change in the posture of each earphone (2) and (3). In the first posture of FIG. 1, it is kept off, and in the second posture of FIG. 2, it is turned on by being pressed by the earphones (2) and (3).
Furthermore, third and fourth switches SW3 and SW4 that are switched from off to on by pressing the earphones (2) and (3) against the ears are arranged on the inner surfaces of both earphones (2) and (3).
For mounting these switches, it is possible to adopt a method in which the switch is exposed on the surface of the headband or earphone, or a method in which the switch is embedded inside the earphone pad.
[0015]
FIG. 3 shows an electrical configuration of the headphone. A well-known amplifier circuit (6) in which the left channel audio signal AL and the right channel audio signal AR input from an audio device such as an MD player can be adjusted in gain. ) To the left channel speaker (4) and the right channel speaker (5). Thereby, each audio signal is converted into sound and emitted.
The above-mentioned four switches SW1 to SW4 are connected to the control circuit (7), and a control signal (SP signal) created by the control circuit (7) is supplied to the amplifier circuit (6), as will be described later. Gain adjustment is performed.
[0016]
The control circuit (7) includes an AND gate (8). The ON / OFF signal from the first and second switches SW1 and SW2 is inverted and input to the AND gate (8), and the third and third switches. The on / off signals from the four switches SW3 and SW4 are input to the AND gate (8) without being inverted. The output signal of the AND gate (8) is output as an SP signal.
[0017]
FIG. 4 shows the relationship between the on / off states of the switches SW1 to SW4, the level of the SP signal, and the magnitude of the gain set in the amplifier circuit (6).
When the earphones (2) and (3) are set to the first posture (FIG. 1), the first and second switches SW1 and SW2 are both turned off as described above, and the third and second switches are worn by wearing the headphones. Both the four switches SW3 and SW4 are turned on. As a result, the SP signal output from the control circuit (7) becomes low (L), and the amplifier circuit (6) is set to a normal low value (first value) gain (headphone mode).
As a result, the earphones (2) and (3) emit a small volume of sound, and a listener wearing headphones can listen to music at an appropriate volume.
[0018]
On the other hand, when the earphones (2) and (3) are set to the second posture (FIG. 2) and the headphones are placed in front of a plurality of listeners, the first and second switches as described above. SW1 and SW2 are both turned on, and the third and fourth switches SW3 and SW4 are both turned off. As a result, the SP signal output from the control circuit (7) becomes high (H), and the amplification circuit (6) is set to a gain (second value) larger than usual (speaker mode). .
As a result, the earphones (2) and (3) emit a large volume of sound, and a plurality of listeners in front of the headphones can listen to music at a sufficient volume.
[0019]
If the earphones (2) and (3) are set to the second posture (FIG. 2) and the headphones are worn on the head or one earphone is put on the ear, the first and second switches Both SW1 and SW2 remain on, and both or one of the third and fourth switches SW3 and SW4 is on. As a result, the SP signal output from the control circuit (7) becomes low (L), and the gain of the amplifier circuit (6) is set to the first value (abnormal mode).
As a result, the volume of the sound emitted from the earphones (2) and (3) is reduced to a low level, and a situation where a large volume of sound directly enters the ear is avoided.
[0020]
As described above, according to the headphone according to the present invention, the headphone mode is set and the user can listen to music alone by wearing the headphone and placing the earphones (2) and (3) on the ear as in the conventional case. This is convenient because the speaker mode is set by one-touch operation by simply changing the direction of the earphones (2) and (3), and a plurality of people can enjoy common music.
[0021]
In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, in the embodiment shown in FIG. 3, the amplifying circuit (6) is built in the headphones, but the SP signal output from the control circuit (7) is supplied to the audio equipment to be built in the audio equipment. It is also possible to adjust the gain of the amplifier circuit.
Each of the switches SW1 to SW4 is not limited to an on / off switch having a contact, and can be configured by various known detection means such as a contactless on / off switch and a sensor.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of a headphone according to the present invention in a headphone mode.
FIG. 2 is a perspective view showing an external appearance of the headphones in a speaker mode.
FIG. 3 is a block diagram showing an electrical configuration of the headphones.
FIG. 4 is a table for explaining mode setting according to on / off of a switch.
[Explanation of symbols]
(1) Headband
(2) Earphone
(3) Earphone
(4) Left channel speaker
(5) Right channel speaker
(6) Amplifier circuit
(7) Control circuit
(8) Andgate

Claims (4)

Headphones (1) are provided with a pair of left and right earphones (2) and (3) at both ends, and both earphones (2) and (3) are supplied with an audio signal through an amplifier circuit (6). Both earphones (2) and (3) are pivotally supported at the end of the headband (1), and both earphones (2) and (3) are in both ears with the headband (1) attached to the head. It is possible to selectively set either one of the first posture that covers the first and the second posture rotated by a predetermined angle from the first posture, and at least one of them At the connection portion between the earphone and the headband, posture detecting means for switching in conjunction with the change in the posture of the earphone is attached, and at least one of the earphones is provided with state detecting means for switching by covering the ear. It is, depending on the attitude detection means When the first attitude is detected, the gain of the amplifier circuit (6) is set to a first value, the posture is detected the second posture by the detection means, and, earphone is by the state detecting means Only when it is detected that the ear is not covered, the gain of the amplifier circuit (6) is set to a second value larger than the first value.   The headphone according to claim 1, wherein the second posture of the pair of left and right earphones (2) and (3) is a posture rotated from the first posture by an angle toward the outside of the headband (1).   The posture detecting means is attached to each of the connecting portions of the headband (1) and the pair of left and right earphones (2) and (3), and only when both posture detecting means detect the second posture. The headphone according to claim 1 or 2, wherein the gain of the amplifier circuit (6) is set to a second value. The first value of the gain has such a magnitude that an appropriate volume can be obtained with the pair of left and right earphones ( 2 ) and ( 3 ) being applied to the ear, and the second value is a pair of left and right earphones ( 2 ) ( 3 ) . The headphone according to any one of claims 1 to 3 , wherein the headphone has a size such that an appropriate volume can be obtained with the earphones ( 2 ) and ( 3 ) sufficiently separated from the ear .

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