JPH0832116B2 - Public address system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an on-premises loudspeaker broadcasting device, and in particular, wireless transmission / reception between a main broadcast amplifier and a plurality of loudspeakers eliminates the need for wiring. The present invention relates to an on-premise loudspeaker broadcasting device capable of supporting simultaneous broadcasting and local broadcasting of individual loudspeakers.

[Prior Art] Conventionally, in-house loudspeaker broadcasting equipment for general broadcasting and emergency broadcasting such as in a building or a specific premises, a broadcasting amplifier provided in a broadcasting room or a disaster prevention center, and a plurality of speakers arranged at predetermined positions,
It consists of a wiring cable that connects the two. Therefore,
Piping and wiring work is required in advance when building a building.

Also, for the ceiling rosette for lighting, which is relatively easy to construct,
It is also proposed that a speaker device in which a receiving device and a speaker are integrated is attached, power is supplied from the ceiling rosette, and radio waves transmitted from the main broadcasting device by radio are received. (Problem to be Solved by the Invention) [Problems to be Solved by the Invention] The above-mentioned conventional public address broadcasting device requires piping and wiring work in advance when constructing a building or the like, which requires a great deal of cost. Is needed. In addition, additional wiring work is required to expand or relocate the speaker once installed.
Wiring work on existing ceilings and walls is difficult.

And since it will be broadcast from the main broadcasting device all at once,
For example, local broadcasts such as store sales floors, bank and hospital window call broadcasts, etc. require separate loudspeaker broadcasting equipment, which causes economic burdens and aesthetic problems associated with expansion work.

In addition, since the local broadcast device and the public address broadcast device are separate systems, it is difficult to hear them when they are simultaneously broadcast, and there is a safety problem in an emergency. Furthermore, a public address broadcasting device connected by a cable with a cable is highly likely to be disconnected in the event of a disaster such as a fire, and in that case, it may not function as an emergency broadcasting device.

Therefore, it is a solution to provide a local loudspeaker broadcasting device that does not require wiring work for a broadcasting amplifier and a speaker, facilitates installation, improves reliability of operation in an emergency, and can also support local broadcasting. A technical problem to be solved arises, and an object of the present invention is to solve the problem.

[Means for Solving the Problems] The present invention has been proposed in view of achieving the above object, and is a main broadcaster having a loudspeaker in which a receiver and a power amplifier are connected to a speaker, and a radio transmission function, respectively. An on-premises loudspeaker broadcasting apparatus comprising an amplifier and a local broadcasting amplifier, wherein the main broadcast amplifier and the local broadcasting amplifier have different transmission channels, and an automatic scanning circuit is provided and set in the receiving section of the loudspeaker. An on-site loudspeaker broadcasting apparatus is provided which is provided with a control unit for selecting and operating the automatic scanning circuit according to the priority order of the received channels.

[Operation] According to the present invention, the output of a main broadcast amplifier installed in a broadcasting room or the like is wirelessly transmitted by a transmitter, and received by a loudspeaker arranged in a radio wave reachable range of the transmitter for broadcasting. The loudspeaker has an automatic scanning circuit, and the circuit is provided with a control unit capable of setting the priority order of reception channels. Therefore, it is possible to support a plurality of transmission channels and receive not only the transmission radio waves of the main broadcasting amplifier but also other transmission channels.

Further, since the transmitters having different transmission channels set for the main broadcast amplifiers are used as local broadcast amplifiers and are arranged on each floor of the premises or in a specific area so that they can be transmitted to the loudspeakers within the radio wave reachable range, With a local broadcast amplifier, for example, different contents can be broadcast on each floor.

Also, because the priority order of the reception channels can be set in the control unit provided in the loudspeaker, for example, when the main broadcast amplifier emits an emergency broadcast radio wave while receiving a general broadcast or a local broadcast, the emergency broadcast is automatically broadcast. Since it is switched to, there is no problem in safety.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the attached drawings. For convenience of description, technical matters that are conventionally known will be described at the same time.

FIG. 1 is an explanatory view showing a public address broadcasting device (1) installed in a building (B). The public address system (1)
Installs the main broadcasting amplifier (3) in the broadcasting room (2), and the output of the main broadcasting amplifier (3) is distributed to each floor by the cable (C) pre-wired during the construction of the building (B). Has been done.

The main broadcast amplifier (3) has a built-in storage battery (4) so as to cope with a power failure, and includes a control unit for switching between general broadcasting and emergency broadcasting, and an arbitrary sound source such as a microphone (M) or a tape deck. Are amplified and output.

The terminals (5) (5) (5) of the cables (C) (C) (C) distributed to each floor are transmitters (6) (6) (6) that modulate the output of the main broadcast amplifier (3). Are connected and transmitted from the transmitting antennas (7), (7) and (7) as a predetermined broadcast frequency. The installation positions of the transmitters (6), (6) and (6) are set within the receivable range of the loudspeakers (8) (8).

The transmitters (6) (6) (6) are main broadcast amplifiers (3)
A storage battery (9) is configured as a power source by switching the transmission channel between general broadcasting and emergency broadcasting by the control signal of
(9) (9) is built in. On the other hand, loudspeakers (8) (8) having a wireless reception function are arranged at predetermined positions on the ceiling of each floor. The loudspeakers (8) (8) ... are lighting fixtures (1
0) (10) ... Formed integrally with each other to facilitate installation and eliminate the need for separate wiring and installation work.

Further, (11), (11) and (11) are movable local broadcast amplifiers, and as shown in FIGS. 2 and 3, a tape deck (14) connected to a built-in microphone (12) and a connection terminal (13). ) Or a switch (15) (16) for a sound source of a record player or the like, and an arbitrary sound source is selected and a transmission section (1
Call from 7). In addition, the radio receiver (18) of the loudspeaker (8) and the switches (19) (20) for transmitting the switch open / close signals of the lighting fixtures (10) (10), which will be described later, are provided, and the switch is operated wirelessly. I do. In FIG. 3, (21) is a control unit that amplifies and modulates a voice signal and a control signal for the lighting fixture (10), etc., (22) is a storage battery, and (23) is an antenna.

Then, the loudspeakers (8) (8) ...
Description will be made with reference to the drawings. In FIG. 4, the loudspeaker (8) is located near the peripheral edge of the ceiling panel (24) and the lighting equipment (10) (1
0) (10) (10) are installed, and the speaker (2
5), antenna (26), radio receiver (18), etc. In addition, (27) is an emergency lighting device that lights up in the event of a power failure, (28) is an indicator light that blinks to call attention during an emergency broadcast, and (29) is an earthquake sensor. Further, a broadcasting circuit (32) composed of a receiving section (30), a power amplifier (31) and the like and an emergency storage battery (33) are incorporated inside the ceiling panel (24).

Next, the operation of the loudspeakers (8) (8) will be described with reference to the circuit block diagram of FIG. The radio wave incident from the antenna (26) is demodulated by the receiving section (30) and output from the speaker (25) as sound from the control section (34) via the power amplifier (31). The receiving section (30) automatically repeats the scanning of the reception channel set by the automatic scanning circuit (35), and when a certain channel is detected, the receiving section (30) stops at the channel and the audio signal is controlled by the control section ( 34).

A control unit (34) for controlling the receiving unit (30) sets a priority order according to the importance of the receiving channel, and lighting equipments (10) (10) ..., an indicator light (28) and a radio receiver (18). ) Is composed of a logic circuit having a control function.
The priority is set such that the first place is emergency broadcast from the main broadcast amplifier (3) and the second place is general broadcast from the main broadcast amplifier (3). Make it blink. Further, the third place is set so that when the earthquake sensor (29) detects an earthquake, the radio receiver (18) is turned on and the earthquake information of the radio broadcast is broadcast from the speaker (25). Then, the clock function of the control unit (34) is used to turn off the radio receiver (18) after a predetermined time. The fourth place is the audio signal transmitted from the local broadcast amplifier (11) and the radio receiver (1
The channel of the switch open / close signal in 8) is set. It should be noted that the switch opening / closing signals of the lighting equipment (10) (10), etc. can be arbitrarily turned “ON” or “OFF” regardless of the priority order described above.
The frequency is changed so that it can be done.

Thus, even when any of the above-described sound sources is being broadcast, when a radio wave having a high priority is received, the radio wave is automatically switched to broadcast, so that the information transmission is surely performed. Unlike the case where the local broadcasting device is separately installed, the local broadcast and the main broadcast are not simultaneously broadcast, so that the broadcast content can be clearly heard.

On the other hand, the power source (36) for operating the loudspeaker (8) is a general commercial power source common to the lighting fixtures (10) (10), and is supplied from an outlet circuit or a lighting circuit with a dedicated charging circuit. The switch circuits (37) of (10) and (10) are separated from the charging circuit (38) of the emergency storage battery (33). Therefore, since the charging circuit (38) of the emergency storage battery (33) is always energized except in the case of power failure, the lighting fixture (10)
(10) ... Do not repeat frequent charging / discharging by the “on” and “off” operations, and there is no fear of shortage of charge capacity or shortening of battery life. Then, during a power failure, the emergency lighting circuit (39) turns on the emergency lighting device (27) and supplies power to the broadcasting circuit (32).

The arrangement of the emergency storage battery (33) is not limited to this embodiment, but a storage battery chamber may be separately provided and power may be supplied by wiring from the storage battery chamber.

Therefore, the present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified version.

[Effects of the Invention] Since the present invention is configured as described in detail in the above one embodiment, wiring work between the main broadcast amplifier and the speaker is not necessary, and a plurality of broadcasts such as whole-house broadcast and call-to-window broadcast are possible. Corresponding to the broadcasting source of. Therefore, it is not necessary to separately install the local broadcasting device, the economical burden is reduced, and the aesthetic problem associated with the installation of the local broadcasting device is solved.

Also, in tenant buildings etc., it is possible to support local broadcasting with different sound sources for each application category, and it will automatically switch to the broadcast at the time of emergency broadcasting or simultaneous broadcasting, so if a local broadcasting device is provided separately In comparison, the reliability of information transmission is improved, and the remarkable effect of improving the easiness of installation, economic efficiency and functionality is achieved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an explanatory view showing an installed state of a public address broadcasting device, FIG. 2 is a perspective view of a local broadcasting amplifier, FIG. 3 is a circuit block diagram of the local broadcasting amplifier, FIG. 4 is a perspective view of the loudspeaker, and FIG. 5 is a circuit block diagram of the loudspeaker. (1) …… In-house loudspeaker broadcasting system (3) …… Main broadcasting amplifier, (8) …… Speaker (11) …… Local broadcasting amplifier (25)… Speaker, (30) …… Reception unit (31)… … Power amplifier, (34) …… Control unit (35) …… Automatic scanning circuit

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroshi Honma 3-41-10 Hashido, Seya-ku, Yokohama-shi, Kanagawa

Claims (1)

[Claims] 1. A private loudspeaker broadcasting apparatus comprising a loudspeaker in which a receiver and a power amplifier are connected to a speaker, a main broadcast amplifier and a local broadcast amplifier each having a wireless transmission function, the main broadcast amplifier being the main broadcast amplifier. The transmission channel of the local broadcasting amplifier is different, an automatic scanning circuit is provided in the receiving section of the loudspeaker, and a control section for selecting and operating the automatic scanning circuit is provided according to the priority order of the set receiving channel. On-premise public address broadcasting device.