JPS63286096A - Speaker equipment - Google Patents

Abstract

PURPOSE:To efficiently reproduce ultra low-pitched sound with small size by providing a speaker unit and a passive radiator to an enclosed housing and providing a sound path to one side of a speaker unit. CONSTITUTION:The speaker unit 2 is fitted to one side of the enclosed housing 1 so as to face externally. An outer housing 4 is provided to surround the entire housing 1 to form a sound path 5. A load is exerted to the speaker unit 2 by the sound path 5, the minimum resonance frequency is lowered to increase the weight of the vibration system of the passive radiator 3 to decrease the stiffness of a support system thereby lowering the minimum resonance frequency of the passive radiator 3 more than the minimum resonance frequency of the speaker unit 2. Then the sound through the sound path 5 and the radiated sound from the passive radiator 3 are added at an opening 6. Thus, the sensitivity is increased and ultra low-pitched sound is reproduced in addition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a speaker device, particularly a speaker device for reproducing deep bass sounds.

[Summary of the invention]

The present invention provides a speaker device for reproducing deep bass sounds, in which a speaker unit and a passive radiator are provided in a sealed housing, and a sound path is provided on one side of the speaker unit, thereby making it possible to efficiently reproduce deep bass sounds in a small size. This is what I did.

[Conventional technology]

The larger the speaker device, the better the bass effect, and therefore suitable for increasing the acoustic effect. However, considering the current residential environment, a small speaker device with a high bass effect is desired.

Therefore, considering the MFB speaker system as a conventional speaker device that is small and effectively produces bass sounds, a bass reflex type, a passive radiator type, a high compliance type, etc. are generally considered.

[Problem that the invention seeks to solve]

However, conventional bass reflex type speaker devices require a long sound path (boat), so although the low range is extended, the level drops, making it impossible to obtain satisfactory bass, and there are also drawbacks such as the large size. there were.

Further, the high compliance type speaker device has drawbacks such as low sensitivity in the low range, making it difficult to obtain good bass sound, and high cost.

In addition, passive radiator type speaker devices can vary the weight and lowest resonant frequency of the passive radiator over a fairly wide range, which can be used to widen the bass. It can be expanded, but the frequency characteristics are third
As shown by the broken line a in the figure, it extends to the high frequency range, and the impedance characteristics are also as shown by the broken line, so in order to use it in the low range, a means to cut off high frequencies is required, and the structure As they became larger, they had drawbacks such as the lowering of the level, although they still produced bass.

The present invention has been made in view of the above, and aims to improve the good characteristics of the passive radiator type and provide a compact speaker device that can efficiently reproduce deep bass sounds.

[Means for solving problems]

The speaker device according to the present invention has a sealed housing (1, 1
0), speaker unit (2) and passive radiator (
3), and -IJ two sound paths (5, 12) of the speaker unit (2) are provided.

(Function) Of course, the speaker unit (2) and the passive radiator (3) are provided at a predetermined interval in the sealed housing (1, 10).
) is exposed outside the housing (1, 10).

And at least the sound path (for example) of the speaker unit (2)
5, 12). In other words, the sound path (5,1) is
2) Form. The sound radiated from the speaker unit (2) and the sound radiated from the passive radiator (3) are transmitted through the sound path (5,
12), the sensitivity is increased and heavy bass is played at the same time. This makes it possible to efficiently reproduce heavy bass with a small size.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 3.

FIG. 1 shows a first embodiment of the present invention, and FIG.
is a diagram of the internal structure seen from the side, and FIG. 1B is a diagram of the internal structure seen from the top. In FIG. 1, (1) is a sealed housing, and a speaker unit (2) is attached to one side of this housing (11) so as to face outside.
Passive radiator facing outside on the other side (3)
can be installed.

Then, an outer casing (4) is provided so as to surround the entire casing (1). The gap between this outer casing (4) and the casing (1) forms a sound path (51). The housing (1) has an opening (6) at the sound path (5).
It is fixed to the outer casing (4) so as not to block it.

The sound path (5) applies a load to the speaker unit (2), lowering the lowest resonant frequency of the speaker unit (2), increasing the weight of the vibration system of the passive radiator (3), and lowering the stiffness of the support system. Therefore, the lowest resonant frequency of the passive radiator (3) becomes lower than the lowest resonant frequency of the speaker unit (2). Then, at the opening (6), the sound radiated from the speaker unit (2) and passing through the sound path (5) is added to the sound radiated from the passive radiator (3), which increases the sensitivity and at the same time reproduces deep bass. become able to.

In FIG. 3, the solid line C is the frequency characteristic of this device,
The solid line d is the impedance characteristic, fl is the lowest resonant frequency of the passive radiator (3), fl is the lowest resonant frequency of the speaker unit (2), and f3 is the sound path (5).
and the resonance frequency of the speaker unit (2). Since there is a sound path (5) in front of the speaker unit (2), the sound path (5)
It can be seen that when the resonance frequency of the speaker unit (2) exceeds 13, the level is attenuated and unnecessary sounds other than deep bass are produced, effectively generating deep bass.

FIG. 2 shows a second embodiment of the invention, and FIG.
2 is a diagram of the internal structure seen from the side, and FIG. 2B is a plan view seen from the top. In FIG. 2, (10) is a sealed housing, and a speaker unit (2) and a passive radiator (3) are attached to the negative side of this housing (10) with a predetermined distance therebetween so as to face the outside.

The housing (lO) is provided with a U-shaped outer housing (11) on one side to which the speaker unit (2) and passive radiator (3) are attached. This outer casing (11)
The gap between the casing (10) and the casing (10) forms a sound path (boat) (12). The outer casing (11) has an opening (13) at its top. In this case, the speaker (2) is also connected to the sound path (12).
When a load is applied to the speaker unit (2), the lowest resonance frequency of the speaker unit (2) is lowered, the amount of the thread of the passive radiator (3) is lowered, the stiffness of the support system is lowered, and the lowest resonance of the passive radiator (3) is lowered. The frequency becomes lower than the lowest resonant frequency of the speaker unit (2).

Then, the sound from the speaker unit <24 and the sound from the passive radiator (3) are radiated and added to the sound path (engine 2), thereby increasing the sensitivity and making it possible to reproduce deep bass sounds.

In this case as well, since the sound path 12) is in front of the speaker unit (2), the sound path (12) and the speaker unit (
The level is attenuated above the resonance frequency according to 2), and unnecessary sounds other than deep bass are not produced, and deep bass is effectively generated.

(Effects of the Invention) As described above, according to the present invention, a speaker unit and a passive radiator are provided in a sealed housing, and a sound path is provided on one side of the speaker unit, so that heavy bass can be reproduced efficiently in a small size. can.

[Brief explanation of drawings]

FIG. 1 is an internal structure diagram showing one embodiment of this invention, FIG. 2 is an internal structure diagram and a plan view showing another embodiment of this invention,
FIG. 3 is a characteristic diagram showing the present invention in comparison with a conventional example. (1), (10) are housings, (2) are speaker units, (3) are passive radiators, (4), (11
) is the outer case, (5). (12) is the sound path.

Claims (1)

[Scope of Claims] A speaker device characterized in that a speaker unit and a passive radiator are provided in a sealed housing, and a sound path is provided on one side of the speaker unit.