JPH04150196A - Sub woofer system for two box car - Google Patents

Abstract

PURPOSE:To allow an ultralow-pitched sound to radiate efficiently without much weight by forming an opening for ultralow-pitched sound radiation to a rear tray board and fixing a sub woofer box whose ceiling face is embedded with the sub woofer unit to a trunk room floor beneath the opening. CONSTITUTION:A bass reflex type sub woofer box 12 whose zenith face 9 is provided with a ultralow-pitched sound reproduction sub woofer unit 10 and a port 11 is fixed to a trunk room floor 8 just beneath an opening 7 of a rear tray board 3 by using a fixing metallic fixture 13. The height of the sub woofer box 12 is selected to a height at which the sub woofer unit 10 and the port 11 arranged to the zenith face facing the opening 7 formed to the rear tray board 3. Thus, the ultralow-pitched sound radiates directly in the cabin through the opening 7 made to the rear tray board 3. Thus, the ultralow-pitched sound is efficiently reproduced and the weight of the sub woofer system is not exerted to the rear tray board 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a subwoofer system for a two-box car.

[Conventional technology]

A two-box car has a passenger living space and a trunk space, and a flat rear tray board that rotates in conjunction with the hatchback-type rear window partitions the space above the floor behind the rear seat to form the trunk room. There is. Therefore, a two-box car cannot have a completely sealed trunk like a three-box car, so even if speakers are installed on the sideboard of the trunk, a sufficient baffle effect cannot be obtained, and heavy Bass reproduction becomes somewhat difficult. Therefore,
In order to compensate for the lack of deep bass in conventional two-box cars, a subwoofer system dedicated to deep bass was attached to the rear tray board.

Figure 4 shows the subwoofer in a conventional two-box car.
An example of the system is shown below. FIG. 4 is a schematic longitudinal cross-sectional view of the trunk of a two-box car seen from the rear of the vehicle, and the subwoofer unit 41 for reproducing deep bass sounds is
It is fixedly arranged toward the interior of the vehicle at an appropriate position on a rear tray board 44 that partitions the trunk room 42 and the vehicle interior 43.

Although not shown, this rear tray board 44 is
It is rotatably supported in the vertical direction by the sideboard 45 at both left and right end positions, and is configured to rotate in the vertical direction in conjunction with the opening/closing operation of the hatchback type rear window 46. When flipped upward, the rear tray board 44 also rotates upward at the same time to open the trunk room 42, so that luggage can be freely taken in and out of the trunk room 42 from the rear of the vehicle.

[Problem to be solved by the invention]

As mentioned above, in the conventional subwoofer system for a two-box car, the subwoofer unit 41 for deep bass reproduction is directly attached to the rear tray board 44 that partitions the passenger compartment and the trunk room, and the rear tray board 44 is used as a baffle plate to separate the trunk room 42. The space inside was used as a back cavity for the speaker.

However, when using a subwoofer system with such a structure, the efficiency is low because the trunk room is not a completely sealed space, and a large amount of power is required to obtain sufficient deep bass. In addition, when the drive is performed with a large amount of power, the rear tray board made of a thin plate made of plastic or the like resonates, which tends to cause so-called chatter noise. Furthermore, since the subwoofer unit 41 needs to reproduce deep bass, it is necessary to use a large-diameter subwoofer unit 41.
Its weight is also quite heavy. For this reason, in the case of a conventional subwoofer system, the strength of the rear tray board 44 to which the subwoofer unit 41 is attached is increased accordingly, and the side board 4 that supports the entire weight of the rear tray board 44 and the subwoofer unit 41 is increased accordingly.
5 also needs to be reinforced by providing a reinforcing plate 47, etc., and there is also the problem that the strength of the trunk area must be made stronger than necessary because of the audio system, which is not directly related to the car body structure. Ta.

The present invention has been made based on the above-mentioned circumstances, and its purpose is to prevent the weight of the subwoofer system from being placed on the rear tray board, and to directly transmit deep bass sounds reproduced from the subwoofer system into the vehicle interior. An object of the present invention is to provide a subwoofer system for a two-box car that can efficiently radiate radiation to a vehicle.

[Means to solve the problem]

In order to achieve the above object, the subwoofer system of the present invention is provided in a two-box car in which a trunk space is formed behind the rear seat by partitioning an interior living space and a trunk space by a rear tray board that rotates up and down. An opening for deep bass radiation is formed at an appropriate position, and a subwoofer box with a subwoofer unit embedded in the zenith surface is fixedly placed on the floor of the trunk room directly below this opening, and the subwoofer box on the zenith surface is fixedly placed. The height of the subwoofer box was selected so that the unit part faces the opening of the rear tray board.

[For production]

Normally, audio playback is performed with the rear tray board closed. When deep bass sounds are reproduced from the subwoofer unit embedded in the top surface of the subwoofer box, these deep bass sounds are directly radiated into the vehicle interior through an opening made in the rear tray board. Therefore, since there is no interference from anything, deep bass can be efficiently reproduced.

Further, the subwoofer box in which the subwoofer unit is embedded is fixedly arranged on the floor of the rear trunk as an independent speaker box, and is not mechanically connected to the rear tray board that partitions the trunk. For this reason, the conventional subwoofer
The weight of the system is not placed on the rear tray board at all, and when loading and unloading luggage, only the rear tray board rotates in conjunction with the rear window.

Therefore, there is no need to increase the strength of the rear tray board or the side board that supports it more than necessary, which is extremely beneficial in terms of vehicle body design.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Figures 1 to 3 show one embodiment of the subwoofer system according to the present invention. Figure 1 is an external view of the trunk section with the rear tray board closed, and Figure 2 is the rear tray board opened. FIG. 3 is a schematic longitudinal cross-sectional view of the trunk compartment.

Rear tray board 3 that separates the passenger compartment 1 and trunk compartment 2
The sideboard 5 is supported by a support shaft 4 provided at both left and right ends.
It is attached so that it can rotate freely in the vertical direction. Further, although not shown, one end of this rear tray board 3 is connected to a hatchback type rear window 6 by a traction wire or the like, and when the hatchback type rear window 6 is opened or closed, the rear tray board 3 is connected to the hatchback type rear window 6 as shown in FIG. It is configured to be opened and closed as shown in FIG. 2, so that luggage can be freely put in and taken out of the trunk 2.

An opening 7 is formed on the surface of the rear tray board 3 at a position near the right end. This opening 7 is an opening for directly radiating deep bass sound output from a subwoofer unit, which will be described later, into the vehicle interior, and its hole shape can be used for a subwoofer box, a subwoofer unit, a bass reflex boat, etc., which will be described later. The optimal hole shape is selected depending on the shape and arrangement of the holes. In the illustrated example, the hole shape of the opening 7 is the simplest rectangular shape.

Directly below the opening 7 of the rear tray board 3 is a bass reflex type subwoofer box located on the trunk floor 8 and equipped with a subwoofer unit 10 and a boat 11 on the top surface 9 for deep bass reproduction. 12 is fixedly arranged by a fixing fitting 13. The box height of the subwoofer box 12 is selected to be such that the subwoofer unit 10 and the port 11 arranged on its zenith surface face the opening 7 formed in the rear tray board 3. For example, if the box height of the subwoofer box 12 is selected so that its zenith surface 9 is in close contact with the back surface of the rear tray board 3, then the rear tray board 3
When the rear tray board 3 is closed, the rear tray board 3 can be placed exactly on the top surface 9 of the subwoofer box 12, and the rear tray board 3 can be firmly supported by the extremely strong subwoofer box 12. I can do it.

Further, in the case of this embodiment, a dedicated woofer amplifier 14 is attached to the side of the subwoofer box 12, and a deep bass signal is supplied through a cord 15 from an audio device installed in the driver's seat, etc. to the subwoofer box 12. It is configured to drive the unit IO.

The subwoofer system of the present invention having the above configuration is normally used in the state shown in FIG. That is, the deep bass sound reproduced and output from the subwoofer unit 10 and the port 11 is radiated directly into the passenger compartment l from the opening 7 of the rear tray board 3. This increases the deep bass that is lacking in 2-box cars and provides well-balanced audio playback.

On the other hand, when loading and unloading luggage, the hatchback type rear window 6 is flipped upward, as shown in the second example. Then, in conjunction with this, the rear tray board 3 is rotated upward as shown in the drawing by a traction wire or the like (not shown), and the trunk room 2 is brought into an open state. Therefore, in this state, luggage can be put into or taken out from the rear of the vehicle. As can be seen from FIG. 2, the weight of the subwoofer system does not act on the rear tray board 3 at all. Therefore, there is no need to increase the strength of the rear tray board 3 and the side board 5 that supports it more than necessary. Furthermore, when the rear tray board 3 is opened and closed, that is, when the rear window 6 is opened and closed, the subwoofer system does not make the rear window heavy.

Although the above embodiment employed a bass reflex type speaker equipped with a boat 11 as a subwoofer system, other types of speakers such as closed type speakers may be used as a subwoofer system as long as they have their own independent speaker boxes. You can.

[Effects of the Invention] As is clear from the above description, when using the subwoofer system of the present invention, the rear tray board and the subwoofer system have a mechanically independent structure. The weight of the subwoofer system is no longer applied to the vehicle, there is no need to increase the strength of the rear tray board or sideboard more than necessary, and the structure around the trunk room of a two-box car can be simplified.

In addition, the deep bass output from the subwoofer system is
The radiation is emitted directly into the passenger compartment through the opening in the rear tray board, making it highly efficient.Furthermore, the subwoofer unit can be attached to a structurally solid subwoofer box, allowing the woofer unit to be driven with high power. Even in such a case, it is possible to provide a subwoofer system for a two-box car that is excellent both acoustically and structurally, without easily generating a chatter sound as in the conventional case.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is an external view of the trunk section in one embodiment of the present invention with the rear tray board closed, and Fig. 2 is an external view of the trunk section in the same embodiment with the rear tray board open. Figure 3 is a schematic cross-sectional view of the trunk section in the same embodiment as above, and Figure 4 is a diagram showing the structure of a subwoofer system installed in a conventional two-box car. 1... Vehicle interior, 2... Trunk room, 3... Rear tray board, 4... Support shaft, 5... Side boat,
6... Rear window, 7... Opening, 8... Floor of trunk room, 9... Zenith surface, 10... Subwoofer unit, 11... Bass reflex type boat, 12
...Subwoofer box, 13...Fixing metal fittings. Patent applicant: Pioneer Corporation No.

Claims (1)

[Scope of Claims] A two-box car in which a trunk space is formed behind the rear seat by partitioning an interior living space and a trunk space by a rear tray board that rotates up and down, wherein an opening for emitting deep bass sound is provided at an appropriate position of the rear tray board. A subwoofer with a subwoofer unit embedded in the zenith surface is located on the trunk floor directly below this opening.
A subwoofer system for a two-box car, characterized in that the boxes are fixedly arranged and the box height of the subwoofer box is selected so that the subwoofer unit part on the zenith surface faces the opening of the rear tray board.