JPS6342771Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle-mounted speaker that is effective when applied to vehicles with a small installation space.

For speakers used in in-vehicle audio devices, if you want to achieve sound quality similar to that of a home stereo inside a vehicle, you will need speakers with a very large diameter and a certain amount of installation space.
Nowadays, the dimensions of passenger cars are becoming smaller worldwide, so the installation space for in-vehicle speakers is becoming smaller and the diameter thereof is also being restricted.

However, in spite of this, users tend to seek better and better sound regardless of the above conditions, and in order to satisfy this desire, it is necessary to adopt a special structure, which avoids the high cost. I can't. In other words, if the aperture is made smaller to fit the installation space, the sound quality characteristics will generally deteriorate, making it difficult to meet the user's wishes.

The present invention was developed in response to the above problems, and includes a box that is attached to a wall in a vehicle interior, and a first speaker unit and a first speaker unit on the front surface of the box that faces the wall surface and the back surface that faces the wall surface, respectively. To provide an on-vehicle speaker capable of producing good sound quality even with a small diameter by providing a second speaker unit and a sound extraction duct on the side thereof. Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are a top perspective view and a bottom perspective view showing an in-vehicle speaker according to an embodiment of the present invention, in which 1 is a speaker box, and 2 is a coaxial type composite speaker unit ( 3 is a speaker unit for bass reproduction provided on its back, 4 is a sound extraction duct provided on its side, 5 is a mounting bracket, and 6 is a mounting screw.

The coaxial composite speaker unit 2 and bass reproduction speaker unit 3 each have an independent magnetic circuit, and are configured to operate independently according to input signals.

As shown in FIG. 3, the speaker constructed as described above is attached to a wall 7 of a vehicle interior, such as a trunk room or a door, so that the back of the box faces the wall. As a result, the coaxial composite speaker unit 3 provided at the front of the box 1 reproduces a signal with a positive phase over the entire bass, middle, and treble ranges. Furthermore, a bass speaker unit 3 provided on the back of the box 1 reproduces a positive phase signal in the low frequency range. Furthermore, the signals radiated from the speaker units 2 and 3 into the space inside the box 1 are phase-inverted and reproduced by being guided in the positive phase direction by the sound extraction duct 4 on the side of the box 1, as shown in Fig. 4. be done.

As described above, according to this invention, a first speaker unit and a second speaker unit are provided on the rear side facing the mounting wall of a common box, which is the wall side, and a sound exhaust duct is provided on the side, so that a car speaker with excellent sound quality can be obtained even though it is small in diameter.

In other words, by installing the speaker of the present invention in the vehicle interior, the air in the space where it is installed is vibrated by the speaker unit installed in the common box, and the sound inside the box whose phase has been reversed by the sound removal duct is corrected. By guiding in the phase direction, sound quality characteristics with enhanced resolution and localization can be obtained. This also prevents abnormal vibrations of the box, making the box smaller and smaller.
It can be configured to be thin. This small and thin structure allows it to be attached not only to the rear parcel part, but also to a door or a front door panel.

[Brief explanation of the drawing]

1 and 2 are top perspective views and bottom perspective views showing an embodiment of the present invention, and FIGS. 3 and 4 are both schematic views showing an embodiment of the present invention. 1...Speaker box, 2, 3...Speaker unit, 4...Sound extraction duct.

Claims (1)

[Claims for Utility Model Registration] 1. A box having a box attached to a wall surface of a vehicle interior, a first speaker unit and a second speaker unit provided on the front surface of the box facing the wall surface and the back surface facing the wall surface. 1. An in-vehicle speaker comprising a speaker unit, and a sound reduction duct is provided on a side surface of the box. 2. The vehicle-mounted speaker according to claim 1, wherein the first speaker unit is a coaxial composite speaker unit, and the second speaker unit is a bass speaker unit.