JPH0365080B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a coaxial speaker having another speaker unit inside the speaker unit.

Conventional configuration and its problems Coaxial speakers have attracted attention in recent years because they have better sound image localization than non-coaxial multiway speakers.

The structure of a conventional coaxial speaker will be explained below.

Figure 1 shows the structure of a conventional 2-way coaxial speaker. 1 is a tweeter diaphragm, 2 is a tweeter edge, 3 is a tweeter voice coil, 4 is a tweeter frame, 5 is a tweeter terminal board, and 6a is a tweeter A. 6b is the tweeter B plate, 6c is the tweeter magnet, 7a is the woofer inner frame, 8a is the woofer inner edge, 8b is the woofer outer edge, 9 is the woofer diaphragm, 10 is the woofer voice coil, 11 is the woofer damper, 12
is the woofer outer frame, 13 is the woofer terminal board, 1
4a is a woofer A plate, 14b is a woofer B plate, and 14c is a woofer magnet.

The structure of the two-way coaxial speaker configured as described above will be explained below.

The magnetic circuit of the woofer is A, B plates 14a, 1
4b and a magnet 14c, and the center of the B plate 14b is hollow. A woofer inner peripheral frame 7a is attached on top of the B plate 14b. This woofer inner peripheral frame 7a is also used as a mounting frame for fixing a tweeter unit inside. The internal tweeter is attached from behind the woofer.

However, in the above conventional configuration, when installing the tweeter unit, the B plate 14 of the woofer is
Since the tweeter unit is attracted in either direction under the influence of the magnet 14c of the magnetic circuit, workability during assembly is very poor and positioning of the tweeter is also difficult. It had

Purpose of the invention The present invention solves the above-mentioned conventional problems.
It is an object of the present invention to provide a coaxial type speaker that is easy to work with and can incorporate a tweeter accurately.

Structure of the Invention The present invention comprises a woofer unit having a cavity in the center of the magnetic circuit, a case provided inside the cavity of the magnetic circuit of the woofer unit for guiding a speaker unit installed inside the woofer unit, and another woofer unit provided inside the case. This is a coaxial speaker equipped with a speaker unit, and by providing the speaker unit guide case inside the cavity of the woofer magnetic circuit, the woofer is not affected by the magnetic force acting between the magnetic circuits of the external and internal speaker units. It is possible to easily incorporate a speaker unit inside the speaker unit, and furthermore, it is possible to position the speaker unit in a concentric arrangement, which is necessary for a coaxial type speaker.

DESCRIPTION OF EMBODIMENTS FIG. 2 shows an embodiment of a two-way coaxial speaker according to the present invention. In Figure 2, 1
is the tweeter diaphragm, 2 is the tweeter edge, 3 is the tweeter voice coil, 4 is the tweeter frame, 5
is the tweeter terminal board, 6a is the tweeter A plate,
6b is the tweeter B plate, 6c is the tweeter magnet, 7b is the tweeter guide case, 8a is the woofer inner edge, 8b is the woofer outer edge, 9
is the woofer diaphragm, 10 is the woofer voice coil, 1
1 is a woofer damper, 12 is a woofer outer peripheral frame, 13 is a woofer terminal plate, 14a is a woofer A plate, 14b is a woofer B plate, and 14c is a woofer magnet. The tweeter guide case 7b is installed in the cavity of the woofer B plate 14b.

The configuration and features of the two-way coaxial planar speaker of this embodiment configured as described above will be explained below.

As in FIG. 1, the unit configuration consists of a woofer made of an external magnetic circuit and a tweeter disposed inside the woofer. The tweeter is installed from the rear of the woofer by passing through the inside of the woofer's outer magnetic type magnetic circuit. At this time, since the tweeter is assembled along the tweeter guide case 7b, the woofer magnetic circuit eliminates the problem of being attracted in any direction even if a magnetic force is applied to the tweeter magnetic circuit. This makes it possible to improve work efficiency when incorporating the tweeter. Furthermore, it is possible to prevent the tweeter magnet 6c from colliding with a part of the woofer magnetic circuit and causing chipping of the tweeter magnet 6c, thereby reducing defects. Also tweeter guide case 7
b into the cavity of the woofer B plate 14b,
By fixing the tweeter at the center of this case 7b, it is also possible to easily position the tweeter at the center of the woofer magnetic circuit.

In the above embodiment, the tweeter guide case 7b is also used as the woofer inner peripheral frame, but it may be used separately. It goes without saying that the present invention can be applied not only to 2-way speakers but also to 3-way and other multi-way speakers.

Effects of the Invention The present invention provides a case for guiding other speaker (midrange, tweeter, etc.) units inside the cavity of the woofer magnetic circuit of a coaxial speaker, thereby allowing the midrange and tweeter units to be guided inside the woofer magnetic circuit. It has the feature that it can be easily incorporated. That is, since the effects of attraction and repulsion between the magnetic circuits of the speaker units can be ignored, work efficiency can be greatly improved. Furthermore, magnet breakage can be completely eliminated, contributing to a reduction in process defect rate.
Furthermore, the case allows more complete concentric positioning of each speaker unit, which is necessary for coaxial speakers.

Therefore, according to the present invention, assembly is easy;
Moreover, a high-performance coaxial speaker with a low defect rate can be realized.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional two-way coaxial planar speaker, and FIG. 2 is a sectional view of a two-way coaxial planar speaker according to an embodiment of the present invention. 1... Tweeter diaphragm, 2... Tweeter edge, 3... Tweeter voice coil, 4... Tweeter frame, 5... Tweeter terminal board, 6a... Tweeter A plate, 6b... Tweeter B plate, 6c... Tweeter Magnet, 7a... Woofer inner frame, 7b... Tweeter guide case, 8a... Woofer inner edge, 8b... Woofer outer edge, 9... Woofer diaphragm, 10... Woofer voice coil, 11... ...wooha damper, 12
... Woofer outer peripheral frame, 13 ... Woofer terminal plate, 14a ... Woofer A plate, 14b ... Woofer B plate, 14c ... Woofer magnet.

Claims (1)

[Claims] 1. A woofer unit having a cavity in the center of the magnetic circuit, and a woofer unit provided inside the woofer magnetic circuit to guide insertion of another speaker unit such as a midrange or tweeter into the cavity of the woofer magnetic circuit from the rear of the woofer unit. and another speaker unit guide case, and a speaker unit such as the midrange or tweeter, which is guided inside the guide case, inserted from the rear of the woofer unit, and coaxially attached to the inside of the woofer unit. Coaxial type speaker.