Intercom device and wiring system using the same
A technology of intercom device and transmission line, which is applied in the direction of frequency/direction characteristic device, transducer shell/cabinet/bracket, transducer acoustic response prevention, etc., which can solve the problems of loudspeaker sound quality and electrical-acoustic conversion efficiency deterioration, etc. , to achieve the effect of preventing howling
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no. 1 example
[0063] like figure 1 and 2 As shown, the intercom device A according to the first embodiment of the present invention includes a casing A1 , a speaker SP, a microphone board MB1 and a voice processing unit 10 . The casing A1 includes a body A10 having an opening at the back thereof, and a cover A11 for closing the opening of the body A10 and accommodating the speaker SP and the voice processing unit 10 therein. The case A10 has a plurality of sound holes 12 formed in the front surface of the body A10. The speaker SP housed in the housing A1 provides sound output through the sound hole 12 to the outside of the housing A1. The microphone board MB1 has a sound hole F2 which picks up the voice uttered by the user from the intercom A. In operation, when the conversation switch SW1 is operated to the ON position, the intercom device A transmits the received voice to and receives signals from the other intercom device A via the information line Ls.
[0064] like figure 2 As sh...
no. 2 example
[0096] like Figure 13 As shown, the intercom device A' according to the second embodiment of the present invention includes the sound pipe 40 provided in the rear air chamber Br having a small volume to improve the sound quality and electro-acoustic conversion efficiency of the speaker SP. Next, the intercom apparatus A' according to the second embodiment will be explained.
[0097] The sound pipe 40 has an opening at one end thereof and a closed end at the other end, and is disposed in the rear air chamber Br so as to follow the inner wall surface of the rear air chamber Br. By setting the resonant frequency of the sound pipe 40 to an appropriate level, the lowest resonant frequency fo of the speaker SP provided in the intercom device A' is shifted to a lower frequency level, and the sound pressure level of the speaker SP increases, resulting in the speaker The sound quality and sound-electric conversion efficiency of SP are improved. Note that in addition to the sound tub...
no. 3 example
[0117] This embodiment provides a wiring system using the intercom device 101 of the present invention. That is, the wiring system enables power and signal transmission between electrical devices that are spaced apart from each other in the building structure.
[0118] like Figure 22 As shown, the wiring system includes power lines Lp and information lines Ls installed in the building structure and connected to commercial power sources AC and the Internet NT through switchboards, a switch box 102 embedded in the wall of the building structure, installed in the switch box and connected to The base unit 103 and the functional unit 104 of the power line Lp and the information line Ls, each of which is detachably connected to a desired one of the base units 103 and has the power supply from the power line Lp, the power supply from the information line in a state of being connected to the desired base unit Ls is at least one function of outputting information and inputting inform...
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