JPH09200885A - On-vehicle speaker equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the output sound pressure level at a low sound frequency by increasing the area of a low sound frequency radiation section. SOLUTION: A passive radiator 11 being a low sound frequency radiation section is mounted to the upper side of a speaker box 8 on a rear partial tray 13 when the front side of the speaker box 8 is directed toward the front of a vehicle. Thus, almost the entire part of the upper side of a speaker box is formed to be the passive radiator 11 so as to increase the output sound pressure level at a low sound frequency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an on-vehicle speaker device mounted on an automobile.

[0002]

2. Description of the Related Art A conventional vehicle-mounted speaker device is shown in FIGS.
This will be described below. As shown in FIG. 1, a high-pitched loudspeaker 2, a mid / low-pitched loudspeaker 3, and a phase-passive passive radiator 4 are provided on the front surface of a loudspeaker box 1 to form a vehicle-mounted loudspeaker device 5.

Although details of the passive radiator 4 are not shown, the passive radiator 4 is mainly composed of a diaphragm and a frame coupled to the diaphragm and does not have a magnetic circuit necessary for a speaker. The sound pressure level in the low-pitched sound range is improved by utilizing the sound pressure to the rear of the diaphragms of the speaker 2 and the speaker 3 for middle and low sounds.

The in-vehicle speaker device 5 is installed on the rear partial tray 6 in the vehicle compartment with the front surface of the in-vehicle speaker device 5 facing the front of the vehicle.

[0005]

In the above-described in-vehicle speaker device 5, since the passive radiator 4 which is the main low-frequency sound emitting portion is directed to the front of the vehicle, the reflection efficiency of sound waves behind the rear partial tray 6 is high. Since the structure is such that the baffle effect by the rear window 7 is difficult to obtain and the passive radiator 4 is provided on the front surface of the speaker box 1, there is a space limitation, for example, 12c.
It was limited to those with a small diameter of about m.

Therefore, there is a problem that it is difficult to increase the output sound pressure level in the low tone range, and the bass feeling is insufficient.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an in-vehicle speaker device capable of improving the output sound pressure level in the low frequency range and reproducing a sufficient low frequency sound. .

[0008]

In order to solve this problem, the present invention provides a phase inverting passive radiator on a surface adjacent to a front surface of a speaker box on which a high frequency speaker and a mid / low frequency speaker are mounted. Since the passive radiator is provided on the surface of the speaker box where the speaker is not provided, the area of the passive radiator is increased and the output sound pressure level in the low frequency range is increased.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a vehicle-mounted speaker device according to claim 1 of the present invention, a high-pitched speaker and a mid- and low-pitched speaker are mounted on a front surface of a speaker box, and a phase opposite to a surface adjacent to the front surface of the speaker box. It has a divertive passive radiator mounted, and since the passive radiator is mounted on a surface different from the mounting surface of each speaker, the area of this passive radiator can be increased and the output sound pressure level in the low range can be increased. Is.

According to a second aspect of the present invention, the passive radiator for phase inversion according to the first aspect is mounted on the upper surface of the speaker box, and the passive radiator is mounted on the upper surface of the speaker box having a large area. ,
The area of the passive radiator can be maximized to raise the output sound pressure level in the low frequency range.

According to a third aspect of the present invention, in addition to the first aspect, since a passive radiator for phase inversion is mounted on the surface of the speaker box facing the rear window of the automobile, the baffle effect by the rear window is achieved. Is what you can get.

An embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. According to the figure, 8 is a speaker box in which a high-pitched speaker 9 and a mid- and low-pitched speaker 10 are mounted on the front surface, and a passive radiator 11 for phase inversion is mounted on the outer edge portion of the upper surface of the speaker box 8 for vehicle mounting. The speaker device 12 is configured.

The on-vehicle speaker device 12 is installed on the rear partial tray 13 with the front surface of the on-vehicle speaker device 12 facing the front side of the vehicle and the passive radiator 11 facing the rear window 14 side. Therefore, the sound wave radiated from the passive radiator 11 is reflected by the rear window 14 and radiated forward, so that the baffle effect is also obtained.

FIG. 3 shows the case where the vehicle-mounted speaker device of the above-mentioned embodiment is installed on the rear partial tray (15).
When the conventional in-vehicle speaker device is installed, the sound pressure frequency characteristics of (16) are shown, and it is shown that the in-vehicle speaker device of the present invention has a high output sound pressure level near 50 Hz.

[0015]

As described above, according to the present invention, by mounting the passive radiator on the surface adjacent to the speaker mounting surface of the speaker box, a large area of the passive radiator can be secured and the output sound pressure level in the low frequency range can be secured. It can be raised.

[Brief description of drawings]

FIG. 1 is a perspective view of a vehicle-mounted speaker device according to an embodiment of the present invention.

FIG. 2 is a side sectional view illustrating a state in which the vehicle is installed.

[Figure 3] Sound pressure frequency characteristic diagram

FIG. 4 is a perspective view of a conventional in-vehicle speaker device.

FIG. 5 is a side sectional view illustrating a state in which the vehicle is installed.

[Explanation of symbols] 8 speaker box 9 high-frequency speaker 10 mid-low frequency speaker 11 passive radiator 12 vehicle-mounted speaker device 13 rear partial tray 14 rear window

Claims (3)

[Claims] 1. An in-vehicle speaker device in which a high-frequency speaker and a mid-low frequency speaker are mounted on a front surface of a speaker box, and a passive radiator for phase inversion is mounted on a surface adjacent to the front surface of the speaker box. 2. The in-vehicle speaker device according to claim 1, wherein a passive radiator for phase inversion is mounted on the upper surface of the speaker box. 3. The in-vehicle speaker device according to claim 1, wherein a passive radiator for phase inversion is mounted on a surface of the speaker box facing the rear window of the automobile.