JPS5914957B2 - speaker device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speaker device in which acoustic characteristics such as the sound image and directivity of reproduced sound can be changed and selected according to the acoustic environment such as the installation location of the speaker device. .

When playing back and listening to music etc. using a stereo device, the sound range required for playback is usually very wide, from 50 Hz to 20,000 Hz.

Therefore, it is difficult to completely reproduce sound in a wide frequency band as described above with a single speaker.

Therefore, in the case of speaker devices used in stereo equipment, the required playback band as described above is usually divided between a high-frequency speaker (tweeter) and a low-frequency speaker (woofer).
There are two known methods, such as a two-way system in which sound is played back using two speakers, or a three-way system, in which sound is played back through three speakers: a high-frequency speaker (tweeter), a mid-range speaker (midrange), and a bass speaker (woofer). It is being

These 2-way or 3-way speaker systems are constructed by attaching two or three speakers to a single baffle plate using various arrangement methods in consideration of the acoustic characteristics, resulting in a single speaker system. It is configured as.

After the plurality of speakers attached to these baffle plates are attached in a predetermined arrangement method, they are fixed and cannot be arbitrarily changed by a listener such as a user.

By the way, when listening to a musical performance such as a violin or piano using the above-mentioned speaker device, each speaker has its own receiver, such as reproducing high-frequency sounds with a tweeter and reproducing low-frequency sounds with a woofer. A reproduction frequency band is determined.

In other words, the sound originally generated by the musical instrument is played back by different speakers depending on the frequency band.

Therefore, depending on differences in the acoustic environment such as where the speaker device is installed or the position of the listener, the sound image of the high-frequency sound played by the tweeter and the sound image of the low-range sound played by the woofer may become misaligned. .

This is because the directional characteristics of treble and bass are different, and the deviation of the sound image is particularly significant in the treble range, where the directional characteristics are strong.

When such a sound image shift occurs, the sound of an instrument, which should originally be generated from one location, is heard from different locations depending on the frequency band, making it extremely difficult to hear.

In particular, the high frequency range has strong directional characteristics, so even though it is being reproduced by a speaker, it may not reach the listener's ears.

Moreover, since such a positional shift of the sound image occurs, there may be a difference between the sound quality of the sound originally reproduced by the speaker device and the sound quality of the sound that reaches the listener's ears.

By the way, the above-mentioned positional deviation of the sound image can be corrected by changing the acoustic environment such as the installation location of the speaker device, but this is not sufficient in places where the installation location and listening position are limited. can't do it.

In such a case, it is possible to correct this by changing the arrangement position and orientation of each speaker, but in conventional speaker devices, each speaker is fixedly attached to a panfle board. I was unable to make the changes described above.

Therefore, the present invention has been proposed to change the arrangement position of the speakers in the negative speaker device or change the direction of the speakers, thereby changing the direction of sound direction and clarifying the sound image localization, so that appropriate reproduced sound can be heard. A first speaker unit that mainly reproduces the first range of sounds is attached so as to overlap the front of a second speaker unit that mainly reproduces the second range of sounds, and the above-mentioned sound is produced in front of the second speaker unit. The first speaker unit can be slid or its direction can be changed.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a speaker device according to the present invention, where 1 is a tweeter which is a first speaker unit that mainly reproduces a high frequency range which is a first sound range, and 2 is a tweeter which is a first speaker unit that mainly reproduces a high frequency range which is a first sound range.
This is a woofer, which is a second speaker unit that mainly reproduces the low frequency range.

The woofer 2 has a cone-shaped diaphragm 7 as shown in FIG. 2, and a spherical cap 8 is attached to the diaphragm 7 so as to close the center hole thereof.

Further, 3 and 4 are stays that are members to which the tweeter 1 is attached.

These stays 3 and 4 are connected to the woofer 2 so that the tweeter 1 is arranged so as to overlap the front surface of the woofer 2.
The frames 5 are mounted in parallel to each other in the radial direction of the frame 5 at approximately the center thereof using metal fittings 3a and 4a.

As shown in FIG. 2, these stays 3 and 4 are bent inward in a dogleg shape so as to follow the diaphragm 7 arranged in a radial manner of the woofer 2 and the camp 8 in the center. An elongated hole 9 is bored in the sloping portion of the short diameter located above the central axis of the woofer 2 in the figure.

On the other hand, the tweeter 1 attached to the stays 3 and 4 is attached so that the auxiliary attachment fits into an opening 11 formed in the center of the plate 10, as shown in FIG.

The attachment part 12 between the tweeter 1 and the auxiliary attachment plate 10 is a fitting recess 13 formed in the inner circumferential wall 11a of the opening 11, and a protrusion 14 formed protruding on the outer circumferential wall 1a of the tweeter 1. It is said to be a universal joint that is fitted so that it can rotate freely.

Furthermore, the auxiliary mounting on which tweeter 1 is attached is on plate 1.
0 is the mounting screw 14a, 14a inserted into the elongated hole 9.
It is attached to stays 3 and 4 with the handle.

That is, the tweeter 1 is attached to the front surface of the woofer 2 via the elongated hole 9 provided at a position offset from the central axis of the woofer 2.

The tweeter 1, which is attached to overlap the front surface of the woofer 2, can be attached to the elongated holes 9 of the stays 3 and 4 by sliding the auxiliary attachment plate 10, thereby changing its attachment position. can.

Further, since the auxiliary attachment part 12 to the plate 10 is a universal joint, its direction can be changed to any direction.

As described above, according to the present invention, since the mounting position and mounting direction of the speaker unit can be freely changed, the directional direction of the reproduced sound can be changed arbitrarily, and the sound image caused by the acoustic environment etc. can be changed. It becomes possible to easily correct deviations, etc.

Further, since the first speaker unit and the second speaker unit are arranged so as to overlap each other, it is advantageous to match the direction of reproduced sound, particularly the direction of high-pitched sound and the direction of low-pitched sound, which have strong directivity.

Furthermore, listeners can freely select sounds that satisfy their own wishes and hobbies in accordance with their own delicate sense of hearing and acoustic environment.

[Brief Description of the Drawings] Fig. 1 is a front view of a speaker device according to the present invention, Fig. 2 is a cross-sectional view thereof, and Fig. 3 shows an auxiliary attachment of a tweeter, which is a first speaker unit, to a plate. It is a perspective view of a state in which it is attached. 1...Tweeter which is the first speaker unit, 2...Woofer which is the second speaker unit, 3.4...The attachment of the tweeter 1 is a member. Stay, 9...stay long hole, 10...
...Auxiliary mounting plate, 12...Mounting is part.

Claims (1)

[Claims] 1 Consisting of a first speaker unit that mainly reproduces a first sound range, and a second speaker unit that mainly reproduces a second sound range, which has a spherical cap configured to close a center hole of a diaphragm, The first speaker unit is movably disposed on the front surface of the second speaker unit except approximately on the central axis thereof via a mounting member attached to the frame of the second speaker unit. A speaker device featuring: