JPH0617422Y2 - Speaker system for car stereo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention is a car stereo speaker system in which the reproduced sound range is expanded to ultra-low frequencies.

<Prior Art> In a conventional car stereo device, a high-frequency receiver section and a low-frequency amplifier section are usually attached to the dashboard or in the vicinity thereof, and a speaker system is usually attached to the rear seat rear left and right ends. However, when a so-called three-dimensional stereo system in which only the low-range speaker is placed in the rear center of the rear seat, especially when aiming for 4-channel playback sound, it can be installed by installing it on the lower left and right ends of the windshield or on the ceiling. Was uplifted. However, in the case of conventional automobiles (especially passenger cars), especially when traveling on gravel roads, wheel tires pick up irregularities on the road surface, and the heavy low-pitched noise that travels along the axles and bearings is trapped in the vehicle interior as noise. , The playback sound quality of the car stereo device was hindered. Also, the car stereo device is not disregarded for the reproduction of the low range, but rather the low range is tabooed and it tried to obtain a good reproduction in the middle and high range as much as possible, so sufficient reproduction sound quality Couldn't get

<Problems to be solved by the invention> However, recently, the road conditions have improved and the gravel-covered road surface has almost disappeared, while a high-quality paved road surface has become available.
With improvements made to the wheel tires of automobiles, the low-pitched rumbling noise is no longer heard in the passenger compartment. In this way, the low range noise in the passenger compartment has been improved to be low,
Since it's becoming quieter, the mid-to-high range playback range is no longer sufficient.

Therefore, the purpose of the present invention is to supplement the unsatisfactory level in the reproduced sound range, particularly in the ultra-low range, to give the listener a soft sense of presence.

<Means for Solving the Problems> The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 and 2 corresponding to the embodiments. The speaker mounting plate (3) on which the speaker (1) is mounted is installed at the rear surface of the space (14) formed by mounting the speaker mounting plate (3) facing the speaker box (2) and the bottom plate (6) at a distance.
A car stereo speaker system in which (7) is provided, and a phase-reversal sound emitting device (11) is provided on the rear wall plate (9) of the inclined speaker box toward the rear window glass (10), respectively.

<Operation> As described above, according to the present invention, the super bass speaker (1) is attached downward to the opening (4) formed in the speaker mounting plate (3), and the bottom plate (6) of the speaker box (2) is attached. ), A space (14) is formed at a distance from the rear window glass (10) on the rear surface of the speaker box (2) leading to the space (4). The sound emitted from the front surface of the diaphragm of the super bass speaker (1) is reflected through the space (4) through the sound emission port (7) to the rear window glass (10) and the passenger compartment ( 8) Radiated into.

Then, on the surface of the rear wall plate (9) of the speaker box (2) facing the rear window glass (10), a duct (11) acting as a high-cut, low-pass filter is attached to the sound outlet (7). Since it is installed at a position where the bass reflex effect is produced, a phase inversion sound emitting device is provided from the rear surface of the diaphragm of the speaker for super bass (1).
The sound emitted through (11) exhibits the bass reflex effect of the sound emitted from the sound emission port (7). Therefore, rich super bass sound of the super bass speaker (1) is radiated into the vehicle compartment (8).

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 1 and 2, and a mid-high range speaker (13) is mounted on a partition plate (5) at the rear of a rear seat (12) so that the front surface is front. Speaker box
(2) is arranged at an appropriate distance from the rear window glass (10). Then, the super bass speaker (1) is attached downward to the opening (4) formed in the speaker mounting plate (3) of the speaker box (2), and the speaker box (2) is attached.
A space (14) is formed facing the bottom plate (6) of the speaker box (6), and a sound emission port (7) is opened on the rear surface of the speaker box (2) toward the rear window glass (10). There is.

Then, the ducts (11) that act as high-cut and low-pass filters are attached to the rear wall plate (9) inclined toward the rear of the speaker box (2) at regular intervals toward the rear window glass (10). is there. Then, when the opening position of the duct (11) is set to a distance at which the distance from the sound emission port (7) can be phase-inverted, among the sounds generated from the rear surface of the diaphragm of the super bass speaker (1). , Only the required ultra-low frequency range is emitted from the duct (11) as the phase inversion sound emitting device, reflected by the rear windshield (10), and is reflected by the rear windshield (10) and the speaker box (2). ) The rear wall plate and the rear wall plate form a horn, so that super bass can be efficiently radiated into the passenger compartment (8) with less noise.

In this way, in the vehicle compartment (8), in the mid-high range, the sound directly enters the listener's ear from the mid-high range speaker (13), and the ultra-low range is reflected and expanded by the rear window glass (10), Since it spreads softly inside the passenger compartment (8), you can enjoy excellent playback sound quality with a clear and natural stereo feeling.

In this case, in the speaker box (2), the mid-high range speaker (13) and the super-low range speaker (1) are, of course, acoustically isolated from each other. The reproduction of the low frequency range between the low frequency range and the high frequency range may be received by the mid-high range speaker (13), the super low frequency speaker (1), or both speakers (13), (1). ).

<Other Embodiments> Also, as shown in FIG. 3, the rear wall plate of the speaker box (2).
(9), on the surface facing the rear window glass (10), a drone cone (21) having the same vibration characteristics as the vibration system including the diaphragm of the super bass speaker (1) is used as a phase inversion sound emitting device. When installed, it operates as a phase inversion speaker system with less loss, so that it can radiate to a lower frequency and obtain a higher super bass output. Therefore, the speaker box (2) becomes compact and it is difficult to localize the ultra-low-pitched sound source, so that a pseudo multi-channel reproduced sound effect can be achieved.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments.
The present invention can be appropriately modified and carried out within a range that achieves the object of the present invention and has the following effects.

<Effect of device> Since the device of the present invention has the above-mentioned configuration, the speaker for super bass (1)
The super low tone generated by the bass reflex effect is the sound of the diaphragm front from the sound emission port (7) and the sound of the rear of the diaphragm from the duct (11) or the drone cone (27) as the phase inversion sound emitting device. To appear.

Further, due to the filter effect of the duct (11), a very low-pitched sound with little noise is reflected on the rear window glass (10) and is generated more efficiently by the horn effect.

Therefore, the present invention is a car stereo speaker system which can use the existing low-frequency amplifier as it is and can reproduce the ultra-low sounds that could not be reproduced up to now at low cost and richly.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an external view, and FIG. 3 is a sectional view of another embodiment. In the figure, (1) is a speaker for super bass, (2) is a speaker box,
(3) is a speaker mounting plate, (4) is a space, (6) is a bottom plate, (7) is a sound emission opening, (9) is a rear wall plate, (10) is a rear window glass,
(11) is a phase inversion sound emitting device.

Claims (3)

[Scope of utility model registration request] 1. A speaker mounting plate (3) having a speaker (1) for super bass mounted in an opening (4), a speaker box (2) and a bottom plate (6).
A sound emission opening (7) on the rear surface of the space (14) formed by being mounted at a distance relative to, and a phase inversion sound emission device (11) on the rear wall plate (9) of the inclined speaker box. Speaker systems for car stereos, each of which is provided toward the rear window glass (10). 2. The phase inverting device comprises a phase inverting duct.
The speaker system for car stereos according to claim 11 which is the utility model registration claim. 3. The car stereo speaker system according to claim 1, wherein the phase inversion sound emitting device (11) is a passive diaphragm (21).