JPH075756Y2 - Compound speaker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a measure for improving the bass range characteristics of a composite speaker device.

[Conventional technology]

5 and 6 are a vertical sectional view and a perspective view showing each example of the conventional composite type speaker device disclosed in Japanese Utility Model Publication No. 50-12366, in which (A) is a diaphragm ( 1) which is mounted on the front baffle (2a) of the cabinet (2) exposed from the front baffle (2a)
Speaker, (3) sound absorbing material provided on the back, (2b)
Is a sub baffle projecting in the cabinet (2) so as to be positioned at the back of the sound absorbing material, and (B) is a diaphragm (1).
This is the second speaker in which a) is attached to the sub baffle (2b) in an exposed state. Further, (4) in the figure is a first cabinet room for accommodating the first speaker (A), and (5) is a second cabinet room for accommodating the second speaker (B).

Next, the operation will be described. That is, the first speaker (A) directly radiates sound from the front baffle (2a) to the outside. The second speaker (B) is biased to cancel back pressure generated when the first speaker operates.
It is configured to improve the bass range characteristics of the first speaker (A).

In general, the bass range characteristic of a speaker device is greatly influenced by the internal volume of the cabinet, and the smaller the internal volume of the cabinet, the lower the bass reproduction limit frequency when the speaker is installed.
It rises significantly due to the back pressure generated when the speaker operates.

[Problems to be solved by the device]

By the way, if the above-mentioned first speaker (A) is to be reproduced up to its bass reproduction limit frequency, it is necessary to make the bass reproduction limit frequency of the second speaker (B) in the second cabinet room (5) substantially equal. Occurs, which limits the internal volume of the cabinet (2), and the smaller the internal volume of the second cabinet chamber (5) of the second speaker (B), the smaller the second cabinet chamber ((2) of the second speaker (B). 5) There is a problem in that it is difficult to match the bass reproduction limit frequency of the above with the resonance frequency of the first speaker (A).

An object of this invention is to reduce the low-frequency reproduction limit frequency of the second speaker containing the second cabinet so as to solve the above problems.

[Means for Solving the Problems]

In the case of this invention, the second cabinet room of the second speaker is provided with a phase inverting port such as a phase inverting port or a phase inverting means such as a passivator.

[Action]

In the case of this invention, since the second cabinet chamber of the second speaker is of the phase inversion type, the bass reproduction limit frequency when the second speaker is attached is lowered.

〔Example〕

An embodiment of the present invention will be described below. That is, in FIG. 1, the same parts as those in FIGS. 5 and 6 are designated by the same reference numerals, and the duplicated description will be omitted.
In the case of this invention, the first speaker (A) for housing the first
The rear wall of the second cabinet chamber (5), which is formed on the back of the cabinet chamber (4) and accommodates the second speaker (B), has a phase inversion port (6) opened to the outside of the cabinet (2). ) Is provided.

As described above, the second cabinet chamber (5) of the second speaker (B) is provided with the phase inverting means including the phase inverting port (6), which is a phase inverting type.
The bass reproduction limit frequency when the speaker (B) is attached can be made lower than that in the case of the conventional closed type cabinet, whereby the bass range characteristic can be improved. FIG. 2 is a frequency characteristic diagram showing a specific example thereof.

The above-mentioned phase inversion port (6) may be brought out from the front baffle (2a) of the first speaker (A) as shown in another embodiment of FIG. 3, or in FIG. Of course, as shown in another embodiment, the passivator (7) may be a phase inverting means for inverting the phase of the second cabinet chamber (5).

[Effect of device]

As described above, the composite speaker device of the present invention is provided with the phase inversion means for making the phase inversion in the second cabinet room for accommodating the second speaker which is biased to cancel the back pressure of the first speaker. Therefore, there is an effect that the bass range characteristics of the composite type speaker device can be improved by an extremely simple means without increasing the size of the cabinet room.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the composite speaker device of the present invention, FIG. 2 is a frequency characteristic diagram, and FIGS. 3 and 4 are similar vertical sectional views showing another embodiment of the present invention. FIG. 5, FIG. 5 and FIG. 6 are a vertical sectional view and a perspective view showing each example of a conventional composite type speaker device. In the figure, (A) is the first speaker, (B) is the second speaker, (1) and (1a) are diaphragms, (2) is a cabinet, (2a) is front baffle, (2b) is subbaffle,
(4) is the first cabinet chamber, (5) is the second cabinet chamber, (6) is the phase inversion port (phase inversion means),
(7) is a passivation radiator. In other figures, the same reference numerals indicate the same parts.

Claims (1)

[Scope of utility model registration request] 1. A first speaker mounted on the front baffle so as to radiate sound from the front baffle of the cabinet and forming a first cabinet room at the back thereof, and the cabinet so as to be located at the back of the first speaker. From the sub baffle provided inside, this sub baffle is installed so as to radiate the sound to the front, and the second baffle is attached to the back.
A second speaker is provided which forms a cabinet room and is biased to cancel the back pressure of the first speaker.
A composite type speaker device characterized in that phase inverting means for inverting the phase of the speaker is provided in the second cabinet chamber of the speaker.