JPH0110062Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a speaker device, in which two speakers are installed side by side as one unit, and each speaker is provided with a backroad horn for boosting low frequencies. , relates to a speaker device suitable for use in a vehicle.

[Prior Art] In a speaker device used in a vehicle, low frequencies become difficult to hear due to noise when the vehicle is running or stopped. For this reason, it is especially desirable to have an enhanced low frequency range.

FIGS. 1 and 2 show conventional speaker devices for boosting low frequencies, with FIG. 1 being a bass reflex type speaker, and FIG. 2 being a backroad horn type speaker device. In both of these types, a bass reflex duct 2 and a back load horn 4 are installed in each of the single cabinets 1 and 3, and a speaker SP is attached to each of the cabinets 1 and 3. It is something that

However, in all such conventional speaker devices, each of the cabinets 1 and 3 is provided with a single duct 2 or a backload horn 4, and each of these is provided with a single speaker SP. However, there was a problem in that the reduction/enhancement was still insufficient for use as a speaker device for use in automobiles, which requires a particularly high degree of enhancement in the low frequency range.

[Purpose of the invention] This invention was made by focusing on the problems of the conventional method, and it has a structure in which two cabinets are arranged side by side by installing a partition plate in one housing.
The purpose of the present invention is to solve the above-mentioned problems by attaching a speaker to each cabinet, and forming backroad horns corresponding to each speaker on both sides of the partition plate, using the partition plate as a common component. There is.

[Example] This invention will be explained below based on the drawings. Third
The figure shows an embodiment of this invention.

First, the structure will be described. Reference numeral 5 in the figure is a buff-full plate, and a box 6 is attached to the back surface of the buff-full plate to form a hollow chamber. The baffle plate 5 has a rectangular planar shape as seen in a normal speaker box. The hollow chamber is divided into two by a partition plate 7 erected approximately in the center thereof, and has a structure in which two cabinets 8 and 9 are arranged side by side. Speakers SP ₁ and SP ₂ are attached to the buttful portions of each of the cabinets 8 and 9, respectively, and each speaker is attached to each of the cabinets 8 and 9.
Backload horns H ₁ and H ₂ compatible with SP ₁ and SP ₂
is provided. Both backs Claude Horn
H ₁ and H ₂ are formed on both sides of the partition plate 7, and this partition plate 7 connects both back road horns H ₁ ,
It is considered to be a common component of H ₂ . Shikiri board 7
The other backroad horn constituent members installed on both sides of the box are also formed so that their lateral lengths (lengths perpendicular to the plane of the drawing) are just long enough to cross the box 6, similar to the partition plate 7. has been done.

Next, the effect will be explained. Each back load horn
H ₁ and H ₂ damp the low-frequency strong vibrations of the corresponding speakers SP ₁ and SP ₂ , and the sound waves emitted from the back of each speaker SP ₁ and SP ₂ are phase-inverted and transmitted to the backroad horns H ₁ and H. ₂ to the front surface of the full board 5, and is in phase with the sound waves emitted from the front surface, emphasizing the low range. And both backs Claude Horn
Since H ₁ and H ₂ are placed adjacent to each other, they act as if twice the phase-inverted sound waves were radiated from a single backroad horn, and compared to conventional ones, the low frequency range is almost the same. It will be strengthened twice.

Next, FIG. 4 shows another embodiment of this invention.
In this embodiment, there is one speaker SP and two backroad horns H ₁ and H ₂ are provided on both sides thereof. In this example, one speaker SP
As a result, approximately twice as many phase-inverted sound waves as those of the conventional system are emitted, so that the low frequency range is enhanced in the same manner as in the previous embodiment.

[Effects of the invention] According to this invention, two backroad horns are arranged adjacent to each other on both sides of the partition plate, and phase-inverted sound waves driven by different speakers are emitted from both backroad horns. Because of this, the low range is almost doubled compared to the conventional one. Since the twice-enhanced low-frequency sound waves are radiated from almost the same location, it is possible to provide a speaker device that is extremely suitable for installation in a vehicle interior with a narrow sound field. Also, according to this idea, 2
Even though two speakers and two backroad horns are installed in parallel, since the partition plate is used as a common component for both backroad horns, the entire structure can be made small and compact. A speaker device that is extremely suitable for installation in a relatively narrow space can be provided.

[Brief explanation of the drawing]

1 and 2 are vertical sectional views showing a conventional speaker device, FIG. 3 is a vertical sectional view showing one embodiment of the speaker device according to this invention, and FIG. 4 is a longitudinal sectional view showing another embodiment of this invention. FIG. 5... Full board, 6... Box, 7... Shikiri board, 4, 9... Cabinet, H ₁ , H ₂ ...
Backload horn, SP ₁ , SP ₂ ...Speaker.

Claims (1)

[Scope of utility model registration request] A box is attached to the back of the baffle plate to form a hollow chamber, and a partition plate installed approximately in the center of the hollow chamber divides the hollow chamber into two to create a structure in which two cabinets are arranged side by side. A speaker device characterized in that a speaker is attached to each of the plate parts, a backroad horn is provided in each of the cabinets, and the diaphragm plate is a common component of both the backroad horns.