JPH0212793Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a speaker device, and particularly to a speaker device that includes an amplifier and a battery and is used as an external speaker for a small portable audio device.

Small portable audio equipment strives to be smaller and lighter, so some of them do not have built-in speakers and are only used for playback through headphones, and even if they do have built-in speakers, the output power is small and the volume and sound quality are rarely satisfactory. .

Therefore, a speaker device has been proposed that has an amplifier and a speaker integrated in a small case, uses the amplifier to amplify the power of the electrical signal sent from the audio device through the connection cord, and enables the speaker to reproduce high-quality sound at high volume. ing. However, the power consumption of this type of speaker device is higher than that of the small audio equipment that is the main device, and in order to reduce the power burden on the main device side and help the main device operate stably, it is recommended to use batteries as a separate power source for the speaker device. Built-in,
In some cases, it is desired to supply power to the main unit from the speaker device side.

However, how much capacity is left in the battery on the speaker device side can only be determined after connecting the main device and the speaker device with a connection cord, and then operating the main device and performing playback operations, which eliminates troublesome operations. Because of this, I often neglect to check the battery.
It is not uncommon to find out that the battery capacity is insufficient when the time comes to use it.

The present invention was proposed to eliminate such disadvantages and inconveniences, and by providing a means for checking the battery capacity within the speaker device, it is possible to check the power supply of the speaker device alone without any troublesome operations. The purpose is to ensure that

Below, the details will be explained based on the drawings.
The acoustic section 5, which includes an amplifier 3 that amplifies the power of an acoustic electrical signal and a speaker 4 that converts the electrical signal amplified by the amplifier 3 from electrical to acoustic, is arranged in a channel corresponding to the left and right channels. In addition, a dry battery or a secondary battery 6 that can withstand multiple charging and discharging is installed between the left and right speakers 4, 4, and power is supplied from the battery 6 to both amplifiers 3, 3 via a power switch 7. Power is supplied.

On the front side 8 of the storage case 2, the left and right speakers 4, 4 are fixed slightly apart, and a power switch 7 and volume controls 9, 9 for adjusting the volume or sound quality are attached.
0 is provided with an input terminal 11 for an acoustic electric signal.
A three-wire jack is used as the input terminal 11, and a small acoustic device 14 such as a tape recorder is electrically connected to the speaker device 1 via a connection cord 13 having a three-wire plug 12 at both ends.

The present invention is characterized by a means 15 for checking the dischargeable capacity of the battery 6 built into the speaker device 1.

This check means 15 includes a low frequency signal oscillator 16 and normally open first, second and third contacts 17, 1.
9 and 20. The check switch 21 is disposed close to the input terminal 11, and as shown in FIG. An operation knob 22 is provided between the case 2. Operation knob 22
The tip 23 projects out of the case from the guide groove 24, and the position can be changed in three steps (center, left and right) by sliding operation, and pressing operation can be performed at each position. By appropriately setting the size of the base end 25 of the operation knob 22, the three contacts 17, 19, 20 are turned on simultaneously at the center position of the operation knob 22, and the second and first contacts 19, 17 are turned on at the left position.
However, in the right position, the first and third contacts 17 and 20 can be turned on individually. Furthermore, as shown in FIG.
They are connected via contacts 19 and 20. Therefore,
When the operating knob 22 is set at the center position of the guide groove 24 and pressed as shown in FIG. 5a, the first contact 17
is closed, the battery 6 is connected to the oscillator 16, and the oscillator 16 operates to generate a low frequency signal, and at the same time, the second and third contacts 19, 20 are also closed, and the low frequency signal for checking is supplied to the amplifiers 3, 3. is applied. This low frequency signal is power amplified by amplifiers 3, 3, and then converted into sound by speaker 4, and the capacity of battery 6 and abnormalities in acoustic parts 5, 5 are checked by the sound generation. Further, when the operating knob 22 is pressed while being slid to the right or left, the second or third contacts 19 and 20 are individually closed, and abnormalities in each left and right channel are checked.

Furthermore, there is a protection mechanism 26 that blocks the above-mentioned check operation during normal sound reproduction to prevent unnecessary sound generation.
It also has As shown in FIGS. 3 and 4, this protection mechanism 26 has a guard plate 27 that is slidable between the check switch 21 and the input terminal 11, and a spring body 29 that connects the guard plate 27 to the input terminal. 11 side, the input terminal 1 is normally connected to the front edge 30 of the guard plate 27.
When the end plug 12 of the connecting cord 13 is inserted into the input terminal 11 as shown in FIG. is inserted between the pressing knob 22 and the contact point to prevent pressing of the knob 22 and prevent unnecessary check operations.

Furthermore, the sound parts 5, 5 of the left and right channels can be separated and housed in separate cases, or can be made exclusively for monaural sound, with appropriate modifications.

As explained above, the present invention provides a speaker device integrally equipped with an amplifier 3 and a battery 6 for supplying power to the amplifier 3, and a capacity check means 1 for the built-in battery 6.
5, it is possible to check whether the battery 6 is usable or not by using the speaker device alone, without having to go through the trouble of operating the audio equipment 14 on the main body side, thereby preventing the battery 6 from running out of capacity. Can be detected.

Particularly, by performing the capacitance check by activating the oscillator 16 and reproducing the oscillation output in the acoustic section 5 to generate sound, there is an advantage that the abnormality test of the amplifier 3 and the speaker 4 can be performed at the same time.

[Brief explanation of drawings]

Fig. 1 is a front view showing the state of use, Fig. 2 is a block diagram showing the outline of the electric circuit, Fig. 3 is an enlarged side view of the speaker device, and Fig. 4 is the same as in Fig. 3.
5a and 5b are sectional views taken along the line, and are sectional views for explaining the operation of the speaker device, and FIG.
5b shows the check state, and FIG. 5b shows the operating state of the protection mechanism. 2...Storage case, 3...Amplifier, 4...Speaker, 6...Battery, 11...Input terminal, 15...
Check means, 16... oscillator, 21... check switch, 22... operation knob, 26... protection mechanism, 27... guard plate.

Claims (1)

[Claims for Utility Model Registration] 1. An amplifier 3 that amplifies an audio-electrical signal input from the outside, a speaker 4 that converts the amplified electrical signal from electric to acoustic, and a battery 6 that supplies power to the amplifier 3. The speaker device includes a check means 15 consisting of an oscillator 16 that supplies a check acoustic electrical signal to the amplifier 3, and a check switch 21 that regulates the timing of energization from the battery 6 to the oscillator 16. A speaker device characterized in that the speaker 4 is operated by the power of the battery 6 in conjunction with a check operation by the check switch 21. 2. The speaker device according to claim 1, wherein the check switch 21 is configured such that a check operation is prevented when an audio-electric signal is input from the outside.