JPS5843336Y2 - Composite speaker system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a composite speaker system, particularly a composite speaker system of the type embedded in the rear tray, door, etc. of an automobile.

Conventionally, when a coaxial composite speaker system is embedded in the rear tray of a car, the entire range from bass to treble 1 is reflected by the rear glass, but in the bass range, the area between the rear tray and the rear glass is exactly where the horn is. This function achieves excellent bass reproduction.

However, there was a drawback in that the sound pressure level was attenuated when the sound was reflected off the rear glass at frequencies above the mid-range that produced a stereo effect.

Figure 1 shows the sound pressure frequency characteristics of a composite speaker system embedded in the rear tray.The solid line (■) shows the case where the sound is emitted directly to the front without being reflected by the rear glass, and the dotted line (■) shows the case where the sound is reflected by the rear glass.

Therefore, in the present invention, a speaker for medium and high ranges is mounted on the sound axis of a speaker for low ranges via a mounting device, and the speaker for mid and high ranges is mounted near the opening side of the speaker for mid and high ranges. , an axis that is perpendicular to the sound axis of the mid-high range speaker, also perpendicular to the sound axis of the bass speaker, and further rotatably attached to one of the shafts located on the rain sound axis of both speakers; This not only prevents the above-mentioned disadvantage of a drop in sound pressure level in the mid-range range and above, but also allows the position of the sound source to be positioned differently in relation to the bass speaker even if the sound emission direction of the mid-range and high-range speakers is changed appropriately. The aim is to provide a composite loudspeaker system that can be kept in a more or less constant position.

The present invention will be explained in detail below based on the embodiment shown in FIG.

A mounting device 2 is detachably attached to the opening surface of the bass speaker 1, and a mid-high range speaker 3 is attached to the mounting device 2 at a position on the sound axis of the bass speaker 1. There is.

Here, the mounting device 2 consists of a grill that is attached to the bass speaker 1 for protection and to improve its appearance.

This grill or mounting device 2 has a ring part A, a central beading part B, and a ring part C2 that radially connects both parts A and B.
It consists of C... and is made of metal or plastic.

Incidentally, the mounting device 2 is not limited to the above-mentioned grill structure, but may be an arm of a type that extends horizontally in the diameter direction of the opening surface of the bass speaker 1 and has its end removably screwed to the bass speaker 1. You can.

Although not shown, a metal net is stretched over the surface of the casing and the mounting device 2.

The speaker 3 for medium and high frequency ranges is housed in a case and arranged on the upper surface of the rear part of the mounting device 2.

The mid-high range speaker 3 has an axis passing near the opening surface of the mid-high range speaker 3 and perpendicular to the sound axis of the mid-high range speaker 3, and the sound axis of the bass speaker 1. It is rotatably attached to one of the shafts which is orthogonal to the rain sound axis of both speakers 1 and 3 and located on the rain sound axis.

That is, instead of an axis passing through the position of the knob 4 that adjusts the sound emission direction of the mid-to-high range speaker 3, the mid-to-high range speaker 3 is configured to be rotatable.

By tightening the knob 4, the speaker 3 for medium and high frequency ranges can be fixed at an arbitrary position 1.

In addition, if the bottom part B of the mounting device 2 is made into a bottomed structure and the height of the case housing the mid-high range speaker 3 is made short, the mid-high range speaker 3 can be mounted on the shaft. Even if the speaker 3 rotates, the occupied space is small, and no part of the speaker 3 protrudes beyond the outer periphery of the beveled part B, which has a negative effect on the effect of the begged part B as an equalizer for the bass speaker 1. It is possible to avoid giving

Next, a composite structure of the bass speaker 1 and the mid-to-high range speaker 3 will be explained with reference to FIG.

A pair of female terminals 9a and 9b are attached to the outer peripheral edge 5a of the frame 5 of the bass speaker 1.

It penetrates the edge 7 and the backing 8 and is insulated from them.

The female terminals 9a, 9b are electrically connected to a relay terminal 12 attached to the frame 5 via a lead wire 13.

10 is a cylindrical insulating tube, and 11 is a conductive terminal, which constitute the female terminals 9a and 9b.

Reference numeral 14 indicates a tinsel wire leading to the lead wire of the voice coil of the bass speaker 1, and reference numeral 15 indicates a lead wire connected to a speaker terminal of an amplifier (not shown).

On the other hand, on the back side of the ring part A of the mounting device 2, the above-mentioned female terminal 9 is attached.
A pair of male terminals 16a corresponding to a and 9b.

16b is provided insulated from the ring part A, and lead wires 17a and 17b drawn out from the mid-to-high range speaker 3 are connected to the male terminals 16a and 16b.

If the mounting device 2 is configured to be rotatable around the sound axis of the bass speaker 1 by, for example, providing a plurality of pairs of male terminals 16a and 16b at predetermined intervals, it is possible to rotate the speaker 3 for medium and high frequency ranges during the installation process. It can be easily installed without being restricted by orientation.

As described above, the present invention installs the mid-high range speaker 3 via the mounting device 2 on the sound axis of the bass speaker 1, and also attaches the mid-high range speaker 3 to the opening surface of the mid-high range speaker. An axis that passes along the side and is perpendicular to the sound axis of the mid-high range speaker 3, and also perpendicular to the sound axis of the bass speaker 1. This is a composite speaker system that is rotatably attached to a shaft located on the sound axis (the shaft that passes through the position of knob 4).

Therefore, when used by being embedded in the rear tray of a car, for example, the sound reproduced by the mid-high range speaker 3 is not reflected by the rear glass and is emitted directly forward with sharp directivity, so the sound pressure above the mid-range range is Of course, the level does not attenuate, even if the mid-high range speaker 3 is rotated, its axis passes through the opening side of the mid-high range speaker 3, and the sound axis of the mid-high range speaker 3 Since it is perpendicular to the sound axis of the bass speaker 1, and is also located on the sound axis of both speakers 1 and 3, the sound source of the mid-high range speaker 3 The position of the speaker 1 does not change much in relation to the bass speaker 1, and can be kept almost constant.

Generally speaking, the acoustic center of a speaker is located slightly in front of the center cap, so from this point of view as well, in the case of the composite speaker system according to the present invention, the position of the sound source of the mid-high range speaker 3 changes depending on its rotation. It can be said that there is almost no difference.

[Brief explanation of the drawing]

Figure 1 shows the sound pressure frequency characteristics when the composite speaker system is installed in a car, Figure 2 is an exploded perspective view of the composite speaker system according to the present invention, and Figure 3 is a cross-sectional view of the main parts of the composite structure. It is a diagram. 1...Speaker for bass, 2...Mounting equipment, 3...Speaker for medium and high frequency range.

Claims (1)

[Scope of utility model registration request] A mid-high range speaker is attached via a mounting device on the sound axis of the low range speaker, and the axis is perpendicular to the sound axis of the mid-high range speaker and passes through the opening side of the mid-high range speaker. . A composite speaker system, characterized in that an axis is orthogonal to the sound axis of the bass speaker and is rotatably attached to one of the shafts located on the rain sound axis of both the speakers.