JP2555611Y2 - Mounting structure of bus fluorescent lamp power supply circuit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply circuit for a fluorescent lamp for in-vehicle illumination of a large bus.

[0002]

2. Description of the Related Art A large bus used for a sightseeing bus or a long-distance bus employs a large number of fluorescent lamps for in-vehicle illumination, and also employs indirect lighting for reflecting light rays on a ceiling.
The power supply of the large bus is generally a DC power supply (24 V), the power supply of the fluorescent lamp is an AC power supply, and a commercial power supply (100 V,
A fluorescent lamp using 50 or 60 Hz) can be mass-produced at low cost, and its design can be freely selected.
Therefore, many large-sized buses are provided with an inverter for converting 24 V DC to 100 V AC and a peripheral circuit as a power supply circuit for a fluorescent lamp. The power supply circuit including this inverter is generally large for a narrow space inside a bus car, and its shape is square and does not conform to the design of the cabin, so it is hidden and installed in a position that can not be seen by passengers It is devised to be.

[0003]

[Problem to be solved by the invention] In the conventional mounting structure,
In a direct lighting type fluorescent lamp in which a fluorescent lamp is attached to a ceiling downward, one power supply circuit is arranged inside the fluorescent lamp alongside the fluorescent lamp. In this structure, when the fluorescent lamp is turned on, the black portion is seen in the appliance in a blurred manner, which is not popular.

[0004] A fluorescent lamp apparatus for indirect lighting has a structure in which a large number of power supply circuits are collectively arranged by partitioning a part of a luggage shelf suspended from a ceiling. This structure originally occupies the place where the passenger's luggage is placed and is not a desirable structure.

[0005] Further, in these conventional structures, the power supply circuit can be mounted on the ceiling in an upward position on a step board,
Similarly, it is necessary to be mounted on the back of the luggage rack on a step platform, which has disadvantages of poor workability and a large number of work steps.
Furthermore, workability is poor when performing maintenance of the power supply circuit.

The present invention is an improvement of the present invention. (1) Good appearance in harmony with the vehicle interior design, (2) Without obstructing the luggage space of passengers, (3) Installation work and maintenance work An object of the present invention is to provide a fluorescent lamp power supply circuit mounting structure with good workability.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a mounting structure using an in-vehicle speaker box which is provided at substantially regular intervals as a hanger for attaching a hanging shelf to a ceiling in a bus cabin. A power supply circuit for supplying power to a plurality of fluorescent lamps for in-vehicle illumination instead of the internal speaker is mounted on one and / or the last one.

[0008] A plurality of power supply circuits are mounted on a single board suitable for the speaker box from which the speakers have been removed.
It is desirable to provide a structure for easily mounting the board in the speaker box.

[0009]

According to the present invention, a speaker for in-vehicle broadcasting is not required at the forefront and the rearmost part from the viewpoint of the sound effect, and at least one of the left and right hanging shelves is a hanging tool. Only the speaker box is attached for the purpose, and the internal speaker is not attached.
The present invention focuses on utilizing this, and implements a fluorescent lamp power supply circuit collectively inside the unnecessary speaker box.

Since the inside of the speaker box is invisible to the passenger, the appearance is not deteriorated at all. In addition, since the speaker box has a structure also used as a hanging tool for supporting the hanging shelf, the space of the hanging shelf is not reduced even if the inside of the speaker box is used.

In a structure in which a power supply circuit is mounted on a board in advance and the board is mounted on a speaker box, the work of mounting the board on a board can be performed on a work desk, so that it is not necessary to perform the mounting work in a narrow space in an unreasonable posture.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a configuration of a bus cabin in the embodiment of the present invention, FIG. 2 is a perspective view showing an external shape of a power supply circuit assembly in the embodiment of the present invention, and FIG. 3 is an external view of a speaker box in the embodiment of the present invention. FIG. 4 is a perspective view showing the shape, and FIG. 4 is a view for explaining the mounting of the power supply circuit assembly in the speaker box in the embodiment of the present invention.

As shown in FIG. 1, the embodiment of the present invention employs the first and last speaker boxes 2 for in-vehicle broadcasting, which are provided at substantially regular intervals as hanging members for attaching the hanging shelves 1 to the ceiling of the bus cabin. A power supply circuit 4 for supplying power to a plurality of fluorescent lamps 11 for in-vehicle illumination is mounted in place of the speaker 3 provided inside one or any of the above.

As shown in FIG. 2, the power supply circuit 4 has a fixing piece 5a which is formed in a U-shape and has an opening side down, and has a fixing piece 5a protruding at one end at an angle slightly higher than a horizontal plane. A plurality (four in the present embodiment) of power supply circuits 4 are mounted by screws 6 on the upper and lower sides of a substrate 5 formed and provided with two holes 5b through which mounting screws are inserted at the other end.

As shown in FIG. 4, a bracket 7 having a groove into which the fixing piece 5a of the board 5 is inserted, and a screw hole at a position corresponding to the center of the hole 5b of the board 5 are provided inside the speaker box 2. The fixing plate 8 provided with is fixed.
A work hole 2a for joining the hanging shelf 1 and the speaker box 2 is already provided on the upper surface thereof.

A predetermined number of power supply circuits 4 are mounted on a board 5 on a work desk in advance by screws 6 and the assembly is inserted into the inside through the work hole 2a. 5 is inserted in the state shown by the broken line in FIG.

Next, the hole 5b is turned in the direction of the arrow, and is fixed to the fixing plate 8 with the fixing screw 10. The fastening of the fixing screw 10 is performed using the speaker grill hole 2b. Since the fixing piece 5a of the substrate 5 inserted into the groove of the bracket 7 is formed slightly upward from the horizontal plane, when the substrate 5 is rotated, a reaction force is applied to the bracket 7 to eliminate play and firmly. Fixed. After the fixing screw 10 is tightened, the speaker grill hole 2b is closed with a shielding plate and the speaker box 2
It is also possible to hide the inside of the device.

The speaker box 2 to which the assembly of the power supply circuit 4 has been attached in this manner is attached to the frontmost A position and the last Z position shown in FIG. 1, or to either the A position or the Z position. .

Usually, the speaker boxes 2 are attached to the left and right staggers in order to enhance the sound effect. For this reason, the speaker boxes 2 at the front position A and the last Z position are empty boxes. According to the present invention, the space can be effectively used.

[0020]

[Effect of the Invention] As described above, according to the present invention, when the power supply circuit is installed, it does not obstruct the luggage space of the passengers, improves the appearance in harmony with the interior design,
In addition, the workability of the mounting and maintenance work can be improved, and the work of mounting the electric circuit on the board can be performed on the work desk. There is an effect that the property can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a bus cabin in an embodiment of the present invention.

FIG. 2 is a perspective view showing an external shape of the electric circuit assembly according to the embodiment of the present invention.

FIG. 3 is a perspective view showing the external shape of the speaker box in the embodiment of the present invention.

FIG. 4 is a diagram illustrating attachment of the electric circuit assembly into the speaker box according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hanging shelf 2 Speaker box 2a Work hole 2b Speaker grill hole 3 Speaker 4 Power supply circuit 5 Board 5a Fixing piece 5b Hole 6 Screw 7 Bracket 8 Fixing plate 10 Fixing screw 11 Fluorescent lamp

Claims (2)

(57) [Scope of request for utility model registration] 1. A mounting structure using a speaker box for in-vehicle broadcasting provided at a substantially constant interval as a hanger for attaching a hanging shelf to a ceiling in a bus cabin, wherein the first and / or last speaker box of the speaker box is used. A fluorescent lamp power supply circuit for a bus, wherein a power supply circuit for supplying power to a plurality of fluorescent lamps for in-vehicle illumination is mounted on each of the plurality of fluorescent lamps instead of a speaker inside the fluorescent lamp. 2. A bus according to claim 1, wherein a plurality of power supply circuits are mounted on a single board adapted to the speaker box from which the speakers have been removed, and the board is easily mounted in the speaker box. Mounting structure for fluorescent lamp power supply circuit.