JP3003344U - ANR headphones - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an ANR headphone capable of listening to an externally input audio signal regardless of ON / OFF of a power supply of an ANR device or battery consumption. [Structure] In the voice coil 1 of the ANR headphones, the audio signal reproducing coil 1b and the ANR coil 1c are independently provided and individually driven.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to headphones used for active noise reduction (which is referred to as ANR in this specification) that detects an external noise component and generates a signal having a phase opposite to that of the noise component to eliminate the noise. It is a thing.

[0002]

[Prior art]

 Conventionally, this kind of ANR headphones is used only for removing noise, and sometimes ANR is activated to simultaneously play back the output signals of the headphone stereo and other audio devices to enjoy music. As an ANR headphone device, there is a device whose schematic configuration is shown in FIGS. 5 (a) and 5 (b). In FIG. 5A, each ANR circuit is connected to a power source such as a battery via a power switch (not shown), and an output signal of the audio device is input to the audio input terminal 12. When the power switch is turned on, the power voltage is applied to the ANR circuit, and the music can be played while the ANR is operating. However, since the audio input signal is directly connected to the mixing circuit 13, it is connected to the driver unit 8 through the following amplifier 9, and the audio signal cannot be reproduced when the power switch is turned off. Further, even when the power switch is turned on, when the battery is exhausted and the voltage drop becomes large, there is a problem that the reproduction cannot be performed similarly.

Further, it is desired that the headphones can be used as ordinary headphones without activating the ANR, and for this reason, the configuration of FIG. 5B has been devised. That is, a switch 14 that interlocks with a power switch (which may also be referred to as an ANR switch) (not shown) is added. The figure shows the power switch ON state, and the switch 14 is in the O PEN state. It is basically the same as that shown in FIG. When the power switch is turned off, the ANR circuit does not operate as in the case shown in FIG. 5 (a), but the switch 14 is turned on and the audio signal is directly input to the driver unit 8. Therefore, music reproduction is performed like normal headphones. can do. With this configuration, the headphones can be used as both ANR headphones and normal headphones, but a signal system switch must be added in addition to the power switch, resulting in an increase in cost. Of course, if the switch 14 is integrated with the power switch, the number of parts does not increase, but a switch with a large number of circuits and contacts is required, and the parts cost increases. Also, when the power switch is turned on and the battery has run down and the voltage drop has become large, it may not be possible to play it back as in the case of Fig. 5 (a), but in order to continue enjoying music, check the battery. It is necessary to replace the power supply or turn off the power switch.

[0004]

[Problems to be solved by the device]

 However, the structure shown in FIG. 5 (a) functions only for ANR, and the structure shown in FIG. 5 (b) can be used for ANR or as normal headphones with the ANR function separated. However, if the cost becomes high due to the component structure and it becomes impossible to play music during use, if you want to continue playing music, extra operations such as battery check, replacement or switch position confirmation, and switching operation are required. However, in either case, there was an inconvenience that music playback was temporarily interrupted.

The present invention has been made in view of the above problems, and an object of the present invention is to realize an ANR headphone that can be used as a normal headphone with a simple structure and at a low cost. It is to provide ANR headphones that can be enjoyed without interrupting music playback without any special operation, regardless of the position of the power switch or battery consumption.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a voice coil 1 of an ANR headphone with an audio signal reproducing coil 1b and an ANR coil 1c which are independently driven, respectively. Further, the audio signal reproducing coil 1b and the ANR coil 1c are arranged on substantially the same plane, or the audio signal reproducing coil 1b and the ANR coil 1c are arranged on substantially the same core.

[0007]

[Action]

 The voice coil 1 of the driver unit 8 installed in the headphones is provided with the audio signal reproducing coil 1b and the ANR coil 1c, and the audio signal is supplied to the audio signal reproducing coil 1b, and the ANR signal is transmitted to the ANR coil 1c. The voice coil can be directly driven by voice input even when the power of the ANR device is turned off, or when the battery is exhausted, by turning on / off the power of the device for ANR. Or you can enjoy music and so on regardless of battery exhaustion.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, reference numeral 1 is a cross-sectional view of the voice coil, which is inside the driver unit 8 as shown in FIG. 3, is engaged with the vibration plate 2, and is a gap formed by the magnet 3 and the yoke 4. The magnetic circuit therein changes the electric current flowing through the coil of the voice coil 1 to convert an electric signal into a voice signal. The driver unit 8 is protected by the casing 5 and the cover 6, and is installed in the headset. Returning to FIG. 1, 1a is a bobbin for winding the coil of the voice coil 1, 1b is a voice signal reproducing coil, and 1c is an ANR coil. By providing the coils separately in this way, the voice coil 1 slides in the magnetic circuit according to the change in the current flowing through each coil, and the diaphragm 2 vibrates in conjunction with this, so that The audio signal and the ANR signal are reproduced according to the signal of.

Further, the audio signal reproducing coil 1b and the ANR coil 1c are overlapped and wound on substantially the same core. By doing so, the stroke during driving in the magnetic gap can be reduced. You can get enough.

On the other hand, FIG. 2 shows another embodiment of the present invention. 2 is the same as FIG. 1 except that the audio signal reproducing coil 1b and the ANR coil 1c are wound around the coil bobbin 1a adjacent to each other on substantially the same core. By doing so, the magnetic gap can be narrowed and the magnetic flux density can be increased.

Next, an apparatus for driving the embodiment of the present invention shown in FIGS. 1 and 2 will be described with reference to FIG. In the figure, 8 is a driver unit mounted on the headset according to the present invention, 9 is an amplifier, 10 is a filter circuit that corrects the phase of a signal from a microphone to invert the phase, and generates an ANR signal, 11 is A microphone 12 collects external noise and converts it into an electric signal, and 12 is an audio input terminal for inputting a voice signal. Here, the signal collected by the microphone 11 and converted into an electric signal is subjected to phase correction by the filter circuit 10 and its phase is inverted to generate an ANR signal. Then, this ANR signal is amplified by the amplifier 9 and supplied to the ANR coil 1c, and the voice coil 1 operates according to this signal. On the other hand, when a voice signal is input to the audio input terminal 12 from the outside, the voice signal is directly supplied to the voice signal reproducing coil 1b, which also drives the voice coil 1. Therefore, since the ANR signal and the voice signal drive the voice coil 1 independently, the voice signal is reproduced even when the power of the ANR device is turned off or the battery is exhausted. Further, since the ANR device is basically composed of the microphone 11, the filter circuit 10, the amplifier 9 and the audio input terminal 12, the structure is simplified.

Although the above description has been made by taking music reproduction as an example, it is needless to say that it is also effective in a so-called headset type headphone device including a microphone used for communication communication in a noisy environment.

[0013]

[Effect of device]

 As described above, according to the present invention, since the voice signal reproducing coil 1b and the ANR coil 1c are separately provided in the voice coil 1 of the ANR headphone, both the ANR headphone and the normal headphone can be used. It can be used. Regardless of the switch position of the ANR device, the state of battery exhaustion, etc., the music reproduction itself can be continued without interruption without extra operation. The configuration of the ANR device is simplified, the manufacture is easy, and the device can be provided at low cost. Has the effect.

Further, since the audio signal reproducing coil 1b and the ANR coil 1c are arranged on the same core, a large stroke can be obtained, and a headphone with a high dynamic range and a high input resistance can be obtained.

On the other hand, if the audio signal reproducing coil 1b and the ANR coil 1c are arranged adjacent to each other on the same surface, the magnetic gap can be narrowed and the efficiency of the headphones can be improved. Manufacturing is also easy.

[Brief description of drawings]

FIG. 1 is a sectional view of a voice coil showing an embodiment of the present invention.

FIG. 2 is a sectional view of a voice coil showing another embodiment of the present invention.

FIG. 3 is a sectional view of a driver unit installed in the headphones according to the present invention.

FIG. 4 is an AN for driving headphones according to the present invention.
An example of the apparatus for R.

FIG. 5 shows an example of a conventional ANR device.

[Explanation of symbols]

 1 voice coil 1a coil bobbin 1b voice signal reproducing coil 1c ANR coil 2 diaphragm 3 magnet 4 yoke 5 casing 6 cover 8 driver unit 9, 15 amplifier 10 filter circuit 11 microphone 12 audio input terminal 13 mixing circuit 14 switch

Claims (3)

[Scope of utility model registration request] 1. A voice coil (1) for an ANR headphone, comprising an audio signal reproducing coil (1b) and an AN.
Headphones for ANR, wherein R coils (1c) are independently provided and individually driven. 2. A voice signal reproducing coil (1b) and an ANR
The headphone for ANR according to claim 1, wherein the coil (1c) for the ANR is arranged on substantially the same plane. 3. A voice signal reproducing coil (1b) and ANR
The headphone for ANR according to claim 1, wherein the coil for use (1c) is arranged on substantially the same core.