JPH0453113Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electrodynamic speaker having built-in electrical circuits such as an amplifier or a branching circuit, and a structure for mounting these electrical circuits.

[Prior Art] An example of a typical structure of a conventional speaker which has an integrated structure in which an electric circuit such as a dedicated amplifier is attached to the main body is explained with reference to FIG. circuit 21
In this case, screw holes are formed at a plurality of locations on the rear surface of the lower plate 22a of the magnetic circuit 22 of the speaker body, and the magnetic circuit 22 is attached with machine screws 24 via a spacer 23 to form an integral structure.

[Problem to be solved] In a conventional speaker having such a structure, an electric circuit 21 exists behind the magnetic circuit 22, and when magnetized as it is, the magnetic circuit 22 and the magnetic pole of the magnetizer If they are far apart, the magnetization will be incomplete, so in the manufacturing process, it is necessary to magnetize before installing the electric circuit, and the attraction force of the magnetic circuit makes subsequent work difficult. In order to protect the circuit components 21b exposed on the rear surface of 22, the protective cover 2
5 was required, and there was a problem that parts and installation work costs were required.

Therefore, the present invention solves the above-mentioned problems of the conventional example by holding the electric circuit by the parts that make up the magnetic circuit, and by creating a structure that prevents the circuit parts from protruding outward to the point where they are damaged. With the goal.

[Means for Solving the Problems] The structure of a speaker integrated with an electric circuit according to the present invention for achieving the above-mentioned purpose will be explained using FIGS. 1 to 3 showing embodiments. The idea is
In an electrodynamic speaker that incorporates an electric circuit such as an amplifier or a branching circuit, the printed circuit board 1a of the electric circuit 1 is connected to a ring-shaped magnet included in the external magnetic circuit 2 of the speaker. This speaker is characterized in that an electric circuit is attached to a magnetic circuit by fitting and being held in a gap 3 formed near the outer periphery of the joint interface with the upper plate or the lower plate.

[Function] In a speaker having such a configuration, the printed circuit board 1a is formed into a ring shape, and when the magnetic circuit 2 is assembled, the inner peripheral part of the printed circuit board 1a is formed, for example, on the interface between the lower plate 2b and the main magnet 2c. The circuit component 1b is fitted into the gap 3 and held between the magnetic circuits 2 and 3.
If you attach it around the speaker toward the front of the speaker, nothing will protrude from the back of the magnetic circuit 2 or the outer periphery of the electric circuit 1, so you can magnetize it after all assembly work is completed. This eliminates the need for a protective cover because the circuit components will not be damaged by contact with external objects during broadcasting or transportation.

[Embodiment] A first embodiment of the present invention will be described in detail with reference to FIG. The upper plate 2 is held on the back of the frame 4 so that it can vibrate inside the frame 4.
a, lower plate 2b and ring-shaped main magnet 2c
An outer magnetic type magnetic circuit 2 consisting of the following is attached.

A stepped portion into which the printed circuit board 1a of the electric circuit 1 is fitted is cut on the upper surface of the lower plate 2b of the magnetic circuit 2, near the outer periphery of the adhesive surface with the main magnet 2c,
When the magnetic circuit 2 is assembled, a gap 3 is formed between it and the main magnet 2c.

In this embodiment, the electric circuit 1 is assembled by arranging the circuit components 1b on a ring-shaped printed circuit board 1a, and during the assembly process of the magnetic circuit 2, the inner peripheral portion thereof is fitted into the gap 3 and bonded. Incorporated. At this time, the circuit component 1b is mounted so as to be placed on the front surface of the printed circuit board 1a.

Figures 2 and 3 show modifications of the first embodiment;
In the figure, a printed circuit board 1a is fixed in a gap 3 at the boundary between an upper plate 2a and a main magnet 2c, and a circuit component 1b faces the back of the speaker.

Figure 3 shows both sides of the main magnet 2c and the upper plate 2.
A gap 3 is formed at two locations between the lower plate 2b and the lower plate 2b, and two electric circuits 1 and 1' are attached to the gap 3.

FIG. 3 shows a second embodiment, which is an application example to a magnetically shielded speaker in which a cancel magnet 2d for leakage magnetic flux is provided on the back side of the magnetic circuit.

Back side of lower plate 2b, cancel magnet 2
A step portion into which the printed circuit board 1a of the electric circuit 1 is fitted is cut near the outer periphery of the adhesive surface with the magnetic circuit 1, and a gap 3 is formed between the magnetic circuit 2 and the main magnet 2c when the magnetic circuit 2 is assembled. The printed circuit board 1a is fixed.

Above, the speaker according to the present invention has been described in detail based on embodiments that are considered to be representative, but the speaker according to the present invention is not limited to the structure of the above embodiment, and can be used as an electric circuit, for example, in addition to an amplifier. It can also be applied to a normal dividing network, in which a protective cover on the back of the speaker is used to protect the magnetic circuit as well as the electric circuit, and the active parts of the electric circuit are brought into contact with the protective cover to have a cooling effect. A speaker that is integrated with an electric circuit, such as a speaker that is integrated with an electric circuit, can be implemented with appropriate modifications as long as it has the constituent features stated in the claims, exhibits the function described in the present invention, and has the effects described below. It is.

[Effects] The speaker according to the present invention has the following effects.

(1) Can be easily used as a single component by simply connecting the power supply and input lead wires.

(2) Since the electric circuit is easy to install and does not require parts such as screws for installation, material costs and labor costs can be reduced. Therefore, the manufacturing cost of the speaker becomes low.

(3) When storing in packaging or cabinets, important parts of the electric circuit do not protrude from the parts that come into contact with external objects, so there is no need for a protective cover on the back of the subica, further reducing material costs. Not only is it easier to handle, but it is also easier to transport and incorporate into other equipment.

[Brief explanation of the drawing]

FIG. 1 is a side half-sectional view of the first embodiment of the present invention;
Figures 2 and 3 are sectional views of the main parts of two types of modifications, Figure 4 is a sectional view of the main parts of the second embodiment, and Figure 5 is a sectional view of the main parts of the second embodiment.
The figure is a partially cutaway side view of a conventional example. 1 is an electric circuit, 2 is a magnetic circuit, and 3 is a gap.

Claims (1)

[Claims for Utility Model Registration] 1. In an electrodynamic speaker incorporating an electric circuit such as an amplifier or a branching circuit, the printed circuit board 1a of the electric circuit 1 is connected to the external magnetic circuit 2 of the speaker. It fits into the gap 3 formed near the outer periphery of the joint interface between the ring-shaped magnet included in the upper plate or the lower plate.
A speaker characterized in that an electric circuit 1 is attached to a magnetic circuit 2 by being held between them. 2 The printed circuit board 1a is connected to the upper plate 2a.
Alternatively, the speaker according to claim 1, wherein the speaker is sandwiched between a lower plate 2b and a main magnet 2c located between the upper plate 2a and the lower plate 2b. 3 The printed circuit board 1a is connected to the lower plate 2b.
2. The speaker according to claim 1, wherein the speaker is sandwiched between the lower plate 2b and a magnetically shielding cancel magnet 2d attached to the rear surface of the lower plate 2b.