JPS6033679Y2 - speaker system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speaker system equipped with a passive diaphragm.

Most conventional speaker systems of this type use passive cones as shown in FIGS. 1A and 1B.

In the figure, 11 is a cabinet, 12 is a diaphragm speaker, 13 is a passive radiator, 14 is a passive cone, 15 is a frame, 16 is an edge, and 17 is a damper.

However, since the conventional type uses a passive cone, it has to be a passive radiator unit, which not only cannot obtain a wide vibration area, but also is expensive and heavy. There are drawbacks.

In addition, in the conventional type, there is no means for canceling out the direction of vibration, so there is a drawback that the cabinet vibrates or moves due to the vibration of the passive cone.

An object of the present invention is to provide a speaker system that eliminates the above-mentioned conventional drawbacks.

An embodiment of the present invention will be described below based on FIG. 2.

In the figure, reference numeral 1 denotes a diaphragm main body made of a film such as a rubber film or an elastic synthetic resin film, and in the embodiment, it has a rectangular shape, and a rectangular heel portion 2 is formed in the center thereof.

This heel portion 2 may be attached as a separate member, or may be integrally molded with the diaphragm body.

The passive diaphragm A formed as described above is stretched by attaching its peripheral edge 3 to the opening edge 4 of the cabinet B as shown in FIG.

In the example shown in FIG. 4, Cabinet B is a box-shaped cabinet with a sealed lower half, and a partition plate is provided in the center of the cabinet to separate the upper half and the lower half. A speaker is attached to the partition plate facing upward.

In the upper half of the cabinet, openings are formed by frame portions 5 on two pairs of opposing circumferential and upper surfaces, and a passive diaphragm A is attached to close these openings. ing.

In this case, the passive diaphragms provided around the four circumferences are formed of a film body such as a rubber membrane or an elastic synthetic resin, and are arranged in a row so that they can be wrapped around the upper frame 5 of the cabinet B. Can be attached.

In addition, in FIG. 4, 6 indicates a driving speaker.

When the passive diaphragm A is mounted on multiple surfaces as shown in FIG. 4, the capacity of the passive diaphragm should be determined in relation to the driving force of the driving speaker.

According to the speaker system of the present invention, the passive diaphragm is constructed by providing a flat heel part on the diaphragm body made of a film body such as a rubber membrane, and by fixing the peripheral part to the opening edge of the cabinet. The structure is extremely simple because the membrane around the heel serves as an edge to provide accurate vibration, and passive diaphragms are symmetrically arranged in two pairs of peripheral openings of the cabinet. As a result, the opposing passive diaphragms are simultaneously driven in opposite directions, and when viewed as a whole, they cancel each other out, preventing the cabinet from vibrating or moving, thereby reducing the generation of harmful sound to reproduced sound.

Since the passive diaphragm is attached to the circumference and top of the cabinet, it has a large vibration area, which increases the sound radiation area and increases efficiency, making it possible to reproduce ultra-low frequencies with a small system. , which is extremely advantageous in terms of cost.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a speaker system using a conventional passive radiator, Figs. 2 to 4 show an embodiment of the speaker system according to the present invention, and Fig. 2 is a perspective view of a passive diaphragm. 3 is a partial sectional view, and FIG. 4 is an exploded perspective view. A: Passive diaphragm, B: Cabinet, 1: Diaphragm body, 2: Heel, 3: Periphery, 4: Opening edge, 5: Frame,
6: Drive speaker.

Claims (1)

[Scope of utility model registration request] A sealed box-shaped cabinet, a partition plate separating an upper half and a lower half of the cabinet, a speaker mounted upward on the partition plate, and two pairs of speakers facing each other in the upper half of the cabinet. It consists of openings provided on the circumferential surface and the top surface, respectively, and a passive diaphragm attached to close these openings, and the passive diaphragm is formed of a membrane body such as a rubber membrane or an elastic synthetic resin. A speaker system consisting of a diaphragm body and a flat heel part provided on a part of the diaphragm body.