JPH06129049A - System ceiling - Google Patents

Abstract

PURPOSE:To obviate wiring work of a speaker by arranging two T bars having conductivity in parallel and by mounting the speaker between these T bars so as to give a sound signal to the speaker. CONSTITUTION:Two conductive T bars 2 are arranged in parallel according to the diameter of a cone part 1a of a speaker, and the speaker 1 is mounted between these two T bars 2 using a fitting 3. And a baffle 11 is interposed between the front face of a cone part 1a of the speaker 1 and a side piece of the T bars 2 to insulate between the T bars 2. Thus, when the T bars 2 are used for transmitting a sound signal, wiring for the speaker 1 in the ceiling can be obviated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for installing a speaker on a system ceiling formed by using a bar.

[0002]

2. Description of the Related Art Conventionally, when a speaker 1 is installed on a ceiling, a ceiling plate 5 is cut out in accordance with the cone shape of the speaker 1 as shown in FIG. In addition, in the case of FIG. 3, the speaker 1 is housed in the mounting box 6, and the mounting box 6 is fixed to the ceiling plate 5 by the fixing bracket 7.

A bar having an inverted T-shaped cross section (hereinafter referred to as T-bar) 2 is used to form a space between the ceiling of a structure and a lighting fixture or an air conditioner outlet. In the system ceiling, as shown in FIG. 4, the speaker 1 was installed between the lighting fixtures 8 arranged in a row. In the case of FIG. 4, a plate 9 is attached to the front surface of the speaker 1 to support both sides of the lighting fixture 8.
Thus, the speaker 1 is supported.

Further, in the case of a system ceiling, there is a case where the two T-bars 2 have a so-called WT bar structure in which they are installed in parallel at a short distance (for example, about 50 mm).
The speaker 1 may be installed using the bar portion as shown in FIG. In this case, the speaker 1 is attached to the side surface of the speaker box 10 having a horn structure whose bottom surface is opened, and the speaker box 10 is fixed to the T bar 2.

[0005]

By the way, any of the above-mentioned construction methods for the speaker 1 requires wiring for sending an audio signal to the speaker 1. In the method of constructing the speaker 1 shown in FIG. 3, this wiring needs to be provided in the space above the ceiling or, in the case of the system ceiling shown in FIG. 4 or 5, in the space between the system ceiling and the ceiling of the structure. However, there is a problem that the wiring work is very troublesome.

The present invention has been made in view of the above points, and an object of the present invention is to provide a system ceiling which does not require wiring work for a speaker.

[0007]

In order to achieve the above-mentioned object, the present invention is a system ceiling constituted by using two bars, in which two conductive bars are arranged in parallel,
A speaker is installed between these bars, and an audio signal is given to the speaker via the bar.

[0008]

According to the present invention, by applying the audio signal to the speaker through the bar as described above, the bar is used as the audio signal wiring, and the speaker wiring work is unnecessary.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. In the system ceiling of this embodiment, two T-bars 2 are installed in parallel according to the diameter of the cone portion 1a of the speaker 1, and the speaker 1 is installed between the two T-bars 2. In this embodiment, the T-bar 2 is made of a conductive material such as steel. And
The upper end of the vertical piece of the T-bar 2 is formed in a substantially square shape, and the lower side of the square-shaped portion 2a is inclined so that the inside faces a little upward.

A metal fitting 3 having electrical conductivity is mechanically and electrically connected to a pair of audio signal input terminals of the speaker 1,
The speaker 1 is mounted between the T-bars 2 using the metal fitting 3. The tip of the metal fitting 3 is formed in a substantially U-shape, and a slanting upward engaging pawl 3a is cut and raised inside the hanging piece on the outside. As the metal fitting 3, the locking claw 3a is formed using a flexible material.

The speaker 1 is attached by pushing the U-shaped portions at the tips of the respective metal fittings 3 so as to fit into the square-shaped portions 2a at the upper end of the T-bar 2. When this is pushed in, the locking claw 3
When a is in contact with the outer surface of the square-shaped portion 2a of the T-bar 2, it is pushed so as to fit into the cut-and-raised portion, and when it passes through the square-shaped portion 2a, it returns to the state shown in FIG. The stop claw 3a is locked to the lower portion of the square-shaped portion 2a to prevent the stopper from coming off.

When mounting the speaker 1, T
In order to provide insulation between the bars 2, the cone portion 1 of the speaker 1
A baffle 11 made of an insulating material is interposed between the front surface of a and the horizontal piece of the T-bar 2. In the system ceiling of this embodiment, as shown in FIG. 2, the output of the amplifier 4 is connected to each T-bar 2, and the audio signal is output through the amplifier 4, the T-bar 2, the metal fitting 3, and the speaker 1 as a speaker. Given to 1.
If the T-bar 2 is used for transmitting audio signals in this way, it is not necessary to provide wiring for the speaker 1 in the system ceiling. Moreover, since the speaker 1 fits neatly between the T-bars 2, the appearance is improved.

By the way, since the T-bar 2 generally has a structure in which the ceiling plate is supported by a horizontal piece, the lower portion of the T-bar 2 is exposed. Therefore, it is preferable to lower the voltage of the audio signal applied to the T bar 2. In this case, the speaker 1 having a low impedance may be used. For example,
In the speaker 1 with 8Ω and rated input of 3W, the voltage applied to the T-bar 2 is 2.83V.

[0014]

As described above, the present invention is a system ceiling constructed by using bars, in which two conductive bars are arranged in parallel, and a speaker is installed between these bars. Since the audio signal is given to the speaker via the bar, the bar can be used as the audio signal wiring, and the speaker wiring work is unnecessary.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a mounting state of a speaker according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a method of transmitting an audio signal.

FIG. 3 is an explanatory diagram of a conventional method of mounting a speaker on a ceiling.

FIG. 4 is an explanatory diagram of a conventional method of mounting a speaker on a system ceiling.

FIG. 5 is an explanatory diagram of another conventional method of mounting a speaker on a system ceiling.

[Explanation of symbols]

 1 speaker 2 T bar

Claims (1)

[Claims] 1. A system ceiling configured by using bars, wherein two electrically conductive bars are arranged in parallel, a speaker is installed between these bars, and an audio signal is output through the bars. A system ceiling characterized by being provided to.