JPS6333422Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an in-vehicle speaker system.

As shown in FIG. 1, for example, when a conventional vehicle-mounted speaker system is installed on the rear tray 5 of a vehicle, the speaker 31 attached to the front panel 11 is placed so as to face forward or diagonally upward. Because of this, the reproduced sound in the medium and high ranges, which has sharp directivity, reaches the listener without being diffused into the vehicle interior, which has the disadvantage that the reproduced sound does not feel rich. In addition, in recent years, high-fidelity reproduction sound has been required for car stereos, and multi-way systems have been adopted for the speakers that make up the system, and due to restrictions on installation space, they are also required to be compact. Because of this, I was unable to obtain a satisfactory bass sound. There are speaker systems that use a drone cone system to increase the reproduction level in the low range, which tends to be lacking, but because there is not enough space to install a drone cone on the front panel, the drone cone system is installed on the rear panel of the speaker system. Those with cones attached are used.

This idea radiates the low-frequency sound reproduced by the drone cone directly into the passenger compartment through the acoustic circuit.
This system improves the drawbacks of the conventional example by installing a diffusion speaker on the top of the cabinet and on the rear of the cabinet, and utilizing the reflection from the rear window, as well as obtaining a sufficient sense of bass along with the sound reproduced by the low-range speaker. This will be explained with reference to the following two figures. (Identical parts in each drawing after the above-mentioned Fig. 1 are indicated by the same numbers.) In Fig. 2, 1 is a cabinet, 11 is a front plate of the cabinet, and 12 is a top plate that is inclined with respect to the bottom plate 13 in the installed state. It is beautifully composed. 14 is a partition plate having a hole 6 for attaching a drone cone, and the inside of the cabinet 1 is connected to the first cavity 1
5 and a second cavity 16. At this time, the partition plate 14 is installed inside the cabinet so that the first cavity 15 and the second cavity 16 each necessarily form a part of the cabinet front plate 11.

At least one or more speakers are installed in the portion of the front plate 11 corresponding to the first cavity wall (the example in FIG. 2 shows a three-way system having a woofer 31, a squawker 32, and a tweeter 33, but other speakers may be installed). It may be a multi-way system (or a single system with only a wide range speaker), and a sound emitting hole 4 forming an acoustic mass is installed in the portion of the front plate 11 corresponding to the second cavity wall. It is perforated.

Next, the drone cone 2 is attached to the partition plate 14, and the stiffness caused by the speaker 31 and the first cavity 15, the stiffness caused by the drone cone 2 and the second cavity 16, and the sound emission hole 4 are The acoustic mass forms a vibrating thread with three degrees of freedom.

The rear panel 12 is equipped with at least one speaker for medium and high frequencies (for example, in the example shown in FIG. 2, the squawker 21
and tweeter 22) are attached.

The speaker system configured as above is 3
Because of the degree of freedom, it not only increases the low-frequency radiation efficiency even though it is a small-volume cabinet, but also increases the speaker system's 31
Because it is radiated from the same surface as the rear window, clear mid-bass sounds are reproduced.At the same time, since the multiple mid-high sound speakers attached to the rear panel 12 face the rear window, the sound radiated from the mid-high sound speakers is The sound is reflected in a complex manner, mixed with the sound radiated from the speakers and sound emitting holes attached to the front panel 11, and is sufficiently diffused into the passenger compartment, creating a very rich sound. It is possible to obtain less reproduced sound.

As mentioned above, the present invention is an in-vehicle speaker system that has a vibration system with three degrees of freedom for low frequencies, and a diffusion speaker attached to the rear plate for mid-high frequencies, and has a small volume. This allows you to obtain rich and clear reproduction sound in a small space.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the structure of a conventional in-vehicle speaker system, Fig. 2 is a sectional view of the inventive in-vehicle speaker system, and Fig. 3 is a partially cutaway perspective view of the inventive in-vehicle speaker system. . 1 is a cabinet; 11, 12, 13, and 14 are a front plate, a top plate, a bottom plate, and a partition plate of the cabinet; 15 and 16 are first cavities;
Second cavity, 2 is drone cone, 31, 32,
33,..., 41, 42,... are speakers, respectively.
4 is a sound emitting hole, 5 is a rear tray, and 6 is a drone cone mounting hole on the partition plate.

Claims (1)

[Scope of utility model registration request] The interior of the cabinet 1 has a front plate 11 and a top plate 12 that is inclined rearward in the installed state.
A partition plate 14 having a drone cone mounting hole 6 divides the cavity into a first cavity 15 and a second cavity 16 such that the wall surface of each cavity includes the front plate 11 of the cabinet 1. The drone cone 2 is attached to the plate 14, and at least one or more speaker units 31, 32, 33,... are attached to the portion of the front plate 11 that constitutes the first cavity 15, and also the front plate 11 second cavity 16
A sound emitting hole 4 communicating with the cavity 16 is bored in the part constituting the cavity 16, and at least one medium and high frequency speaker 41, 42, . . . is attached to the top plate 12. In-vehicle speakers.