JPS6219035Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to improvements in speakers, particularly speaker frames.

Conventionally, there have been speakers of this type as shown in FIGS. 1 and 2. In the figure, 1 is a speaker frame integrally formed by die-casting or press processing, and 2 is a drive unit composed of a diaphragm 3, a dust cap 4, and a voice coil (not shown), attached to the speaker frame. This is the edge I support. 5 is a magnetic circuit.

Next, the operation will be explained. The input applied to the speaker causes the voice coil to vibrate, causing vibrations in the diaphragm 3 and radiating the sound into the air.At this time, the vibrations generated in the diaphragm 3 are also transmitted to the frame 1, The integrally formed frame generates its own resonance. This resonance causes the frame to vibrate, and this vibration becomes sound, causing sound pressure distortion in the speaker. In order to suppress the resonance of the frame that causes such an adverse effect, conventionally the frame has been thickened to provide rigidity and to prevent resonance as much as possible. However, even with this method, it is not possible to sufficiently prevent frame resonance, and the price is also high, especially for bass speakers with a diameter of 30 cm or more or
Ultra-bass speakers with a length of 80 cm or more had the disadvantage that the mold for forming the frame was large and the cost of the mold was expensive.

This idea was made in order to eliminate these conventional drawbacks, and it is possible to reduce the natural resonance sound by dispersing the resonance, and to sufficiently reduce the resonance by preventing the resonances from affecting each other. The purpose of this invention is to provide a speaker that can be manufactured at low cost by downsizing the frame molding mold.

An embodiment of this invention will be described below with reference to FIGS. 3 and 4. Fig. 3 shows a front view, Fig. 4 shows a side view, and 1 is a small frame divided into four parts, 1a, 1b, 1c, 1.
d, the frame part of the speaker formed by combining 2 with the edge, 3 with the diaphragm, 4 with the dust cap, 5 with the magnetic circuit, and 6 with the small frames 1a, 1b, 1c, and 1d of the above-mentioned divided frame 1. An adhesive is used to connect these small frames to each other, and this adhesive is made of a rubber-based material that has vibration-proofing properties or is made of a damping agent. That is, small frames 1a, 1b, 1c, and 1d are obtained by dividing the speaker frame 1 into four parts on the circumference.
are connected with vibration-proof adhesive or damping agent.

Next, the operation will be explained. The input applied to the speaker causes the voice coil to vibrate, which causes vibrations in the diaphragm 3 and is radiated into the air as sound. At this time, some of the vibrations generated in the diaphragm 3 are also transmitted to the frame 1, causing vibrations. do. At this time, the frame 1 includes a plurality of small frames 1a, 1b, 1c, 1 on the circumference.
Since the frame is divided into 3 parts, the vibration is dispersed to each small frame, and the natural resonance is also dispersed, and the small frames vibrate independently, so the resonance in the frame part is sufficient compared to the conventional frame that is formed integrally. It can be suppressed. Furthermore, each small frame 1a, 1b, 1c, 1d
Since an adhesive or damping agent having vibration-proofing properties is interposed between the two, the resonance of the frame can be further suppressed by this vibration-damping effect. Further, the mold for forming the speaker frame can be a small one with divided small frame parts, and a speaker frame with a large diameter can be formed, which is inexpensive, and the cost of the mold can also be reduced. Also, since the divided frames are connected with adhesive or damping agent and formed into one frame before being attached to the magnetic circuit, there is no change in speaker assembly.

Although the above embodiment does not say anything about the material of the small frames, it goes without saying that each small frame may be made of a different material and the size of the small frames may be changed.

As described above, according to this invention, the resonance of the speaker frame can be sufficiently suppressed in an inexpensive manner without complicating the structure of the frame itself or making the wall thicker than necessary.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional example, Figure 1 is a front view, Figure 2 is a side view, Figures 3 and 4 are an embodiment of this invention, and Figure 3 is a front view. , FIG. 4 is a side view. In the figure, 1 is a frame, 1a, 1b, 1c, 1d
is a small frame, 2 is an edge, 3 is a diaphragm, 4 is a dust cap, 5 is a magnetic circuit, and 6 is an adhesive. Note that the same reference numerals in the figures represent the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] The speaker frame is formed by a combination of a plurality of frame parts divided into two or more on the circumference,
A speaker characterized in that a damping agent or an adhesive that performs a damping effect is filled between each frame.