JPS5931094Y2 - speaker system - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a speaker system.
The present invention relates to a speaker system suitable for in-vehicle use that includes a back chamber.

When installing a speaker system, especially a car-mounted speaker system, in a vehicle, the location is the dash board or the rear parcel tray.
In any case, the rear space of the speaker unit is wide open, and if it remains as it is, the speaker unit's ability as an acoustic transducer cannot be fully utilized, so the speaker unit is housed in a cabinet or placed in a back cabin. used with.

In particular, in the case of a vehicle-mounted speaker unit, since it is necessary to have a small volume, a small cabinet or a back chamber is used to improve the acoustic characteristics.

The back chamber is formed into a desired shape (space) using wood blocks or plastic, and a sound absorbing material such as felt or glass wool is layered inside the back chamber.

Therefore, the current situation is that molding the back chamber requires time and effort in addition to molding the chamber itself, as well as processing such as layering the sound absorbing material.

Therefore, this idea aims to reduce manufacturing costs by making it possible to layer sound-absorbing material on back chambers, cabinets, etc. at the same time as molding.To this end, felt material is impregnated with synthetic resin. This is then heated and pressurized to form a back chamber or cabinet of the desired shape, and the surface facing the speaker unit, in other words, the inside, retains the softness of the felt and is expected to have sound absorption properties. The device is characterized in that it is constructed by attaching a speaker unit to the speaker unit.

An embodiment of this invention will be described below with reference to the attached drawings.

First, in the figure, reference numeral 1 indicates a rear parcel tray, and a speaker unit 2 is arranged so as to look through a window hole 1a formed in the rear parcel tray 1.

The outer peripheral portion 2a of the speaker unit 2 is supported by the inner peripheral edge of the window hole 1a, and the speaker unit 2
A back chamber 3 is disposed on the back side of the speaker unit 2, and the outer peripheral edge of the back chamber 3 is supported by the window hole 1a together with the outer peripheral portion 2a of the speaker unit 2.

The back chamber 3 surrounding the back space of the speaker unit 2 has a pair of molded walls made of felt material 31 impregnated with a synthetic resin, preferably a thermosetting resin 32.
It was molded using K2.

The amount of thermosetting resin 32 impregnated into the felt material 31 is different between the inside of the back chamber 3 and the outside of the back chamber 3. The resin 32 is impregnated, but the inner part is not impregnated or only a little is impregnated.

As a result, when the felt material 31 is heated and pressurized, the outside of the back chamber 3 becomes hard, while the sound absorbing properties of the felt material remain on the inside.

Furthermore, by controlling the temperature of the mold when molding the back cabin, it is possible to make the outside of the back cabin 3 hard and the inside soft.

That is, the mold for the outside part of the back cabin 3 has 2 parts.
The temperature of the inner part of the mold may be set higher than 1, and the part containing a large amount of thermosetting resin may be pressed at a higher temperature.

The back cabin 3 has a flange 3a used when attaching it to the peripheral edge, and a hardened part 3 formed for the purpose of reinforcement.
b in a ring shape at the bottom.

In addition, if the strength of the back chamber 3 is insufficient, in the process of heating and pressurizing the felt material 31, reinforcing paper is integrally pasted on the outside of the back chamber, in other words, on the surface to be hardened. Good.

Although the case where the present invention is applied to an in-vehicle speaker system has been described above, this invention can also be applied to other speaker systems.

As is clear from the above explanation, the speaker system of this invention is made by impregnating one surface of a material with high sound absorbing properties with more synthetic resin than the ground surface, and then pressurizing and heating this to make the hard side. Since the back cabin and cabinet are molded with the outside part and placed on the back of the speaker unit, it is possible to reduce costs by simplifying the manufacturing process, and the cabinet and back cabin themselves are flexible. , it can be used even when there is a protrusion in the space behind the speaker system, has excellent sound absorption properties, and the sound absorption properties can be selected.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the speaker system of this invention installed on a rear parcel tray for vehicle use, Figure 2 is an enlarged sectional view of the felt material, and Figure 3 is an explanatory view showing an example of the processing process. be. 1... Rear parcel tray, 1a...
・Window hole, 2...Speaker unit, 3...
... Back chamber, 31 ... Felt material, 3
2... Thermosetting resin, 3a... Flange, 3b... Cured part.

Claims (1)

[Scope of utility model registration request] A speaker system that includes a back chamber that accommodates the back side of a speaker unit, the back chamber having a resin-impregnated felt material heated and pressed into a desired shape so that the speaker unit side is soft and the outside side is hard. .