JPH07222273A - Speaker and manufacture of the same - Google Patents

Abstract

PURPOSE:To provide the speaker which improves bonding property, improves an abnormal resonance or abnormal sound proof effect and automates the manufacture by bonding a buffering member, which is foamed by fusing any specified resin and injecting inert gas, onto a face for fitting the opening part of an acoustic tube to an instrument. CONSTITUTION:Concerning the speaker which couples an acoustic tube 2 for guiding a sound wave onto the front face of a speaker 1 buffering members 20 and 21, which are foamed by fusing thermoplastic olefin resin or thermoplastic polyesther resin and injecting inert gas, are coupled onto the fitting face of the opening part of the acoustic tube 2 to the instrument. These buffering members 20 and 21 are rich in bonding property and provided with the respective proof effects of abnormal resonance or sounds generated by the vibrations caused by sound waves generated from the speaker and the abnormal resonance or sounds generated from the leakage of sound waves generated from the back of the speaker 1 although they are adhering objects composed of low-adhesiveness resin such as PP resin. Further, workability is improved as well and only by coating required parts with the foamed resin in the galvanoized state, the buffering members 20 and 21 can be formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device in which an acoustic tube for guiding sound waves is coupled to the front surface of a speaker used in various audio equipments, and a method for manufacturing the speaker device.

[0002]

2. Description of the Related Art Regarding a conventional speaker device of this type,
It will be described below with reference to the drawings.

FIG. 5 is a plan sectional view showing a television receiver having a conventional speaker device mounted thereon.
In FIG. 5, 1 is a speaker, 2 is an acoustic tube to which the speaker 1 is attached, 3 is a television cabinet, 4 is a cathode ray tube, 5 is a tip opening of the acoustic tube 2, 6 is a sound absorbing material, 7 is a cathode ray tube 4 and a television. A sound guide portion formed by utilizing a space between the cabinet 3 and the cabinet 8, an opening portion of a television receiver formed by the sound guide portion 7, and a sound forming the opening portion 5 of the acoustic tube 2. The fitting ribs 10 for joining the front end of the tube 2 and the television cabinet 3 are the first ribs provided at the joint between the front end of the acoustic tube 2 and the cathode ray tube 4 that form the opening 5 of the acoustic tube 2. The cushioning material 11 is a second cushioning material provided at a portion of the fitting rib 9 that joins the television cabinet 3 with the tip portion of the acoustic tube 2 that forms the opening 5 of the acoustic tube 2.

The first cushioning material 10 and the second cushioning material 11 used for the mounting surface of the opening 5 of the acoustic tube 2 to the equipment are the mounting portions of the opening 5 of the acoustic tube 2 to the equipment. Is used for the purpose of preventing the occurrence of abnormal resonance and noise caused by vibration of sound waves generated from the speaker 1, and abnormal resonance and noise caused by leakage of sound waves generated from the back surface of the speaker 1. is there.

As described above, in the conventional speaker device, the first surface is made of the foamed urethane sheet, the foamed polyethylene sheet, the non-woven fabric, or the like on the mounting surface of the opening 5 of the acoustic tube 2 to the device.
It was general that the cushioning material 10 and the second cushioning material 11 were attached to the device with screws, bolts and nuts, etc.

As a conventional method for manufacturing the speaker device, a sheet made of a foamed urethane sheet, a foamed polyethylene sheet, a non-woven fabric or the like is punched into a predetermined size and shape to form a first cushioning material 10 and a second cushioning material. 11 is made, and these are fixed to the attachment surface of the opening 5 of the acoustic tube 2 to the device by using an adhesive or an adhesive tape.
It was connected to the device with screws, bolts and nuts, etc. via the cushioning material 10 and the second cushioning material 11.

[0007]

However, in the above-mentioned conventional configuration, the second cushioning member 11 provided on the fitting rib 9 for joining the tip end portion of the opening 5 of the acoustic tube 2 and the television cabinet 3 to each other, Since the first cushioning material 10 provided at the joint between the tip portion and the cathode ray tube 4 is configured to be joined together by using an adhesive or a double-sided adhesive tape, the surface shape of the joint may be uneven. If the shape becomes complicated, the environmental temperature becomes high, which causes problems such as misalignment and improper bonding.

The first and second cushioning materials 10 and 11 are also provided.
Since the work of joining the two is performed manually, such work is not only inefficient, but also has many problems such as an increase in man-hours and an increase in cost.

The present invention has improved the above-mentioned conventional drawbacks, and even an adherend made of a resin having poor adhesiveness such as PP resin has excellent joining property, and abnormal resonance caused by vibration due to sound waves generated from a speaker. Device having a cushioning material for a highly reliable speaker device that prevents abnormal resonance and abnormal sound caused by leakage of sound waves generated from the back surface of the speaker It is intended to provide a method.

[0010]

In order to solve the above-mentioned problems, a speaker device and a method for manufacturing the same according to the present invention are a speaker device in which an acoustic tube for guiding sound waves is coupled to the front surface of the speaker. A cushioning material made by melting a plastic polyester resin and injecting an inert gas to foam the same is connected to a mounting surface of the acoustic tube at the opening of the acoustic tube.

As a method of manufacturing the speaker device, a thermoplastic olefin resin or a thermoplastic polyester resin is heated and melted, and an inert gas is injected into the foam to foam the resin, and the foamed molten resin is used. Is applied to the end face of each side wall that becomes the opening of the acoustic tube using a coating nozzle in a spiral shape to apply to the end face and a part of the side wall, and this is cooled and cured to the device at the opening of the acoustic tube. This is a manufacturing method in which a cushioning material is bonded to the mounting surface of.

[0012]

With this structure, even an adherend made of a resin having poor adhesiveness such as PP resin has excellent bonding properties, and abnormal resonance or noise caused by vibration due to sound waves generated from the speaker and the rear surface of the speaker are generated. It has the effect of preventing abnormal resonance and abnormal sound caused by the leakage of sound waves, and at the same time, it is easy in workability, and it is possible to form the cushioning material just by applying the foamed molten resin to the necessary places. Yes, it enables automation during manufacturing.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The speaker device according to this embodiment is used by being attached to a television receiver as shown in FIG. 5 of the above-mentioned conventional example, and a description of this television receiver will be omitted.

FIGS. 1 and 2 are a perspective view and an enlarged sectional view of a main part of the speaker device according to the embodiment.
In FIG. 2, 1 is a speaker, 2 is an acoustic tube to which the speaker 1 is attached, 9 is a fitting rib that joins the tip of the acoustic tube 2 that constitutes the opening of the acoustic tube 2 and the television cabinet 3, and 20 is The first cushioning material provided at the joint between the tip of the acoustic tube 2 that constitutes the opening of the acoustic tube 2 and the cathode ray tube (not shown) of the television, and 21 indicates the acoustic that constitutes the opening of the acoustic tube 2. It is a second cushioning material provided at the portion of the fitting rib 9 that joins the distal end portion of the tube 2 and the television cabinet 3.

Regarding the first cushioning material 20 and the second cushioning material 21 of the speaker device of the present invention configured as described above,
A more detailed description will be given.

The first and second cushioning materials 20 and 21 are obtained by heating and melting a thermoplastic olefin resin or a thermoplastic polyester resin and using nitrogen gas or carbon dioxide gas as an inert gas in an amount of 0.2 to 0. It is injected and foamed at a pressure of 0.6 kgf / cm ² , and this is applied as a first cushioning material 20 to the joint between the tip of the acoustic tube 2 forming the opening and the cathode ray tube of the television, or Similarly, it is formed by applying the second cushioning material 21 to the joint between the opening of the acoustic tube 2 and the fitting rib 9 provided on the television cabinet 3, which is the mounting surface to the device.

The method for forming the first and second cushioning materials 20, 21 is to use a hot melt applicator 13 equipped with a coating nozzle 12 shown in FIG. 3 to apply a thermoplastic olefin resin or a thermoplastic polyester resin. 180-200
It is formed by heating and melting at a temperature of ℃, injecting an inert gas such as nitrogen gas into this to foam, and applying the foamed molten resin to a desired position of the opening of the acoustic tube 2. is there.

The expansion ratio of the molten resin at this time can be freely selected up to a maximum of 4 times. Among them, the expansion ratio of 2 to 2.5 times is the most suitable ratio, and if the expansion ratio is low, The flexibility is slightly inferior, and when the foaming is high, the flexibility is high, but the shape dimension and shape retention tend to be insufficient.

In order to form the first and second cushioning materials 20 and 21 by applying the foamed molten resin at desired positions in the opening of the acoustic tube 2, the applying nozzle 12 of the applying device is used. As shown in FIG. 3 and FIG. 4, the molten foamed resin is spirally applied to the end surface of each side wall which is the opening of the acoustic tube 2, and a part of both side walls orthogonal to each side is applied. Also, the above-mentioned resin is applied at the same time, and then the resin is cooled and hardened, so that the first and second cushioning materials 20 and 21 are bonded to the acoustic tube 2 to be formed.

Further, when the foaming resin is spirally applied to the center lines of the respective sides forming the end faces of the openings of the acoustic tube 2 as the first and second cushioning members 20 and 21, using the application nozzle 12, The foamed resin can be simultaneously applied to a part of both side walls orthogonal to each side, and a conventional method is to manually cut a non-woven fabric or the like into a fixed size and bond the same with an adhesive. By comparison, in the present invention, work can be performed in a few seconds, application can be performed regardless of the shape of the application surface, waste can be eliminated, and automation can be achieved. In other words, in terms of productivity, what used to require two workers can be automated with one hot melt applicator, the number of personnel can be reduced by two, and the work efficiency is about 6 times faster than before. It can be produced, the material cost is about 1/10, and there is no material loss. That is, this is because the foamed resin can be regenerated even if a coating mistake is made. Further, the coating method may be bead-shaped or zigzag-shaped instead of being spiral-shaped as in the above embodiment.

Further, the first and second cushioning materials 20, 21
Is excellent in bondability even if it is an adherend made of a resin having poor adhesiveness such as PP resin, and causes abnormal resonance or abnormal sound caused by vibration of sound waves generated from the speaker 1 and sound waves generated from the back surface of the speaker 1. It has the effect of preventing abnormal resonance and abnormal noise caused by leakage, and at the same time, it is extremely easy to work with. The first and second buffers can be provided by simply applying the foamed molten resin to the required locations. The materials 20 and 21 can be formed, automation at the time of manufacturing is enabled, waste is saved, and resource saving is realized.

[0023]

As described above, the speaker device and the method of manufacturing the same according to the present invention are used for a speaker device in which a thermoplastic olefin resin or a thermoplastic polyester resin is melted and an inert gas is injected to foam the same. By adopting a structure used as a cushioning material for the above, the above-mentioned cushioning material has excellent bondability even if it is an adherend made of a resin having poor adhesion such as PP resin, and abnormal resonance or abnormality caused by vibration due to sound waves generated from the speaker It has the effect of preventing abnormal resonance and abnormal sound caused by leakage of sound and sound waves generated from the back surface of the speaker, and at the same time, it is extremely easy in workability. It is possible to form a cushioning material just by applying it,
It enables automation during manufacturing, reduces waste, and saves resources.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a speaker device according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the relevant part.

FIG. 3 is a perspective view showing a cushioning material applicator according to the embodiment.

FIG. 4 is a perspective view of an essential part showing a cushioning material in a spirally applied state according to the embodiment.

FIG. 5 is a sectional view showing a television receiver to which a conventional speaker device is attached.

[Explanation of symbols]

 1 Speaker 2 Acoustic Tube 3 Television Cabinet 4 Cathode Ray Tube 5 Acoustic Tube Opening 7 Sound Conducting Section 9 Fitting Rib 12 Coating Nozzle 13 Hot Melt Applicator 20 First Buffer Material 21 Second Buffer Material

Claims (2)

[Claims] 1. In a speaker device in which an acoustic tube for guiding sound waves is connected to the front surface of a speaker, a cushioning material formed by melting a thermoplastic olefin resin or a thermoplastic polyester resin and injecting an inert gas to foam the above is used. A speaker device coupled to the mounting surface of the opening of the acoustic tube to the device. 2. A thermoplastic olefin-based resin or a thermoplastic polyester-based resin is heated and melted, an inert gas is injected into this to foam, and the foamed molten resin is applied to an acoustic tube using an application nozzle. Spiral coating is applied to the end face of each side wall to be an opening to apply to the end face and a part of the side wall, and this is cooled and hardened to bond a cushioning material to the attachment surface of the opening of the acoustic tube to the device. The method for manufacturing the speaker device according to claim 1.