JPS6228151Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a headphone device with a built-in receiving function, and in particular, a power switch built into the device is turned on and off when the headphone device is worn on the head or not. It is.

In general, with headphone devices that have built-in receivers, amplifiers, etc. that are powered by batteries and have reception functions, when the headphone device is removed from the head, the sound cannot be heard, so it is possible to forget to turn off the power switch. However, in such a case, there is a disadvantage that the battery is wasted.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a headphone device that eliminates the need to turn off the power switch when the headphone is not worn as described above, and eliminates wasted battery power.

Hereinafter, the present invention will be explained based on specific examples.

The headphone device constructed according to the present invention has the following features:
Support rods 2,
The headphones are constructed by attaching a pair of headphone cases 3 and 4 with built-in speakers via a headband 2, and due to the elastic deflection force of the headband 1, the headphone cases 3 and 4 are moved relative to each other as shown in FIG. are in contact.

By the way, as shown in FIG. 2, the sound emitting side of the headphone casings 3 and 4 in which the speakers 5 are built-in is made of a metal plate such as a conductive aluminum plate with a through hole 6 for sound emitting. The formed protection plate 7 is attached by fitting the peripheral edges. This protective plate 7
Ear pads 8 are attached to the top so as to fit around the peripheral edges of the headphone casings 3 and 4 and come into contact with the protection plate 7. The ear pads 8, which are in relative contact when not worn, are made of conductive plastic, carbon fiber, or a non-conductive synthetic resin body, and a metal film is deposited on the surface of the main body, and is configured as a conductor. has been done. Note that this conductor portion only needs to be formed at least in the relative contact portion of the ear pad 8. Electrical continuity is established between the ear pad 8, which is configured as a conductor, and the voice coil 9 of the speaker 5. If the headphone casings 3 and 4 are made of a conductive material such as metal, this continuity can be achieved by connecting the headphone casings 3 and 4 and the voice coil 9 with a lead wire 10, and the ear pads 8 Since it is fitted into the headphone casings 3 and 4, electrical continuity is achieved. Alternatively, in the case of an ear pad 8 having a conductor section only at the relative contact portion, conduction may be established between the conductor section of the ear pad 8 and the voice coil 9 via the diaphragm 11 section of the speaker 5. good.

As described above, when the headphones are not worn, the ear pads 8 formed as conductor parts attached to the headphone casings 3 and 4 come into relative contact with each other, thereby establishing electrical continuity between the ear pads 8 and the voice coil 9 of the speaker 5. The headphone device according to the present invention has a function of receiving audio signals such as those from television broadcasts, and has a built-in receiver 12 as shown in FIG. The received signals are inputted and reproduced through the speakers 5, 105, speakers 13, 14, and amplifiers 16, 17 built into the headphone cases 3, 4, respectively. The ear pad 8 of one headphone case 3 is connected to an inaudible band frequency from an oscillator 18 constituting an oscillation circuit via the input line of the speaker 5, that is, the input end of the voice coil 9 which is connected to the ear pad 8. For example, the oscillation output of 100KHz is input. Also, the ear pads 8 of the other headphone case 4
is connected to ground 19. Therefore, the pair of headphone cases 3 and 4 can be separated and attached to the head, and each headphone case 3 and 4 can be attached to the head and not attached to the head.
Electrical conduction and non-conduction between the ear pads 8 and 8 provided on the ear pads 8 and 8 are achieved. When the ear pads 8 are electrically connected, the ear pad 8 of the other headphone case 4 is connected to the ground 19, so the oscillation output applied to the ear pad 8 of the one headphone case 3 is grounded, reducing its output level. Therefore, the ear pads 8,
Oscillator 1 that changes depending on conduction and non-conduction between 8
Level detector 20 detects the oscillation output from 8.
is connected to the input end of the voice coil 9, which is the connection portion of the oscillator 18 to the ear pad 8 of the headphone case 3. Then, the level detector 20 detects an oscillation output that changes depending on the conduction and non-conduction between the ear pads 8 and 8, and the power switch 22 that switches the power supply 21 is turned on and off based on this detection output. It is composed of Note that the power switch 22 is connected to each amplifier 16,
It is connected to 17.

By the way, in this embodiment, when the headphone device is attached to the head, the ear pads 8, 8 of each headphone case 3, 4 are separated and are in a non-conducting state.
When the detection level of the level detector 20 increases, the power switch 22 is turned on, and when the ear pads 8, 8 are removed from the head and come into contact with each other, a conductive state is established, and the detection level of the level detector 20 decreases. The power switch 22 is configured to be turned off.

Therefore, when the headphone casings 3 and 4 are not worn, the ear pads 8 of the headphone casings 3 and 4 are brought into contact with each other by the action of the headband 1, so that the power switch 22 is turned off.

According to the present invention as described above, the power can be always turned off when the device is not worn, thereby preventing power consumption, and the power can be turned on when the device is attached, improving operability. .

In the above embodiment, since the ear pad 8 of the other headphone case 4 is at ground potential, the ear pad 8 of the one headphone case 3 is
When the oscillator 18 conducts, the level of the oscillation output of the oscillator 18 becomes 0. However, considering the amplifiers 16 and 17, the oscillation output is made non-conductive using a resistor so that the detection level does not become 0 even when the amplifiers 16 and 17 are conductive. It may be changed when conduction occurs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view of a headphone case constituting the present invention, and FIG. 3 is a circuit diagram of a headphone device according to the present invention. 1... Headband, 3, 4... Headphone case, 5... Speaker, 8... Ear pads, 18
...Oscillator, 20...Level detector, 22...Power switch.

Claims (1)

[Scope of utility model registration request] Headphone casings with built-in speakers are attached to both ends of the elastically deflecting headband so that they are in relative contact with each other when the headphone casings are not worn, and conductor parts are provided in the relative contact portions of the pair of headphone casings, The output end of the oscillation circuit is connected to the conductor part, and the other conductor part is connected to the ground, and when the conductor parts are connected, it is detected that the output level from the oscillation circuit changes, and this detection output is A headphone device that has a power switch that turns on and off depending on the situation.