JP2007281638A - Speaker diaphragm, speaker employing it, and electronic apparats and device employing that speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a speaker diaphragm for use in acoustic equipment, a speaker, and an electronic apparatus and a device, and to achieve a speaker diaphragm having water resistance inexpensively. <P>SOLUTION: When a paper diaphragm is made, it is impregnated with water repellent composed of fluororesin and then moisture is evaporated by hot press. Since the speaker diaphragm 27 is impregnated instantly with water repellent composed of fluororesin up to the interior, water resistance of the speaker diaphragm 27 is enhanced and the cost can be reduced by shortening the time of water-repellent processing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to speaker diaphragms used in various audio equipment and video equipment, speakers using the same, electronic equipment such as stereo sets and television sets, and devices such as automobiles.

  In the recent audio industry and the automobile industry equipped with audio equipment, the quality of sound reproduced from speakers has improved dramatically due to the widespread use of digital equipment.

  The next goal in these industries is how to create sound that matches the user-oriented sound quality, which has been dramatically improved by the spread of digital devices.

  For this reason, the diaphragm which is a component having a very large weight for determining the tone color of the speaker has been reconsidered as a diaphragm based on paper because of the degree of freedom of design of the tone color.

  Since these paper diaphragms have a small specific gravity, have an appropriate internal loss, and can make paper by mixing various materials, the tone of the speaker can be adjusted in detail.

  Further, since these paper diaphragms have a hygroscopic property, the surface of the diaphragm has to be impregnated with a water repellent.

  A conventional speaker paper diaphragm will be described below with reference to the drawings.

  FIG. 5 is a cross-sectional view of a conventional speaker paper diaphragm. The conventional speaker paper diaphragm 7 is produced by a papermaking method, paper is made, water is evaporated by heating and pressing, and then dried, and then impregnated with a water repellent.

  Therefore, the cross section is in a state where a water repellent film 7B is formed on the surface of the paper-made body portion 7A.

  The water repellent film 7B prevents moisture from entering the body portion 7A.

As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
JP 2002-199488 A

  Compared with a diaphragm made of a metal material or a resin material, the paper diaphragm generally has a hygroscopic property on the material, and when this moisture absorption is high, the rigidity tends to be low. It was.

  For this reason, when the diaphragm absorbs moisture and its rigidity is lowered, the sound quality is changed, and it becomes impossible to realize user-oriented sound creation.

  Paper diaphragms are usually designed to exert a minimum waterproof effect, that is, an effect of eliminating the absorption of moisture in the air, by using a sizing agent. However, water droplets and water are applied directly to the diaphragm like an automobile speaker. In such a use environment, the sizing agent alone was not sufficient.

  Therefore, in order to reduce the hygroscopicity, it is necessary to impregnate the diaphragm with a water repellent. However, it takes a lot of time and labor to impregnate the water repellent and further to dry them, and the cost of the diaphragm is expensive. It has a problem of making it difficult.

  An object of the present invention is to solve the above-mentioned problems and to provide a speaker diaphragm capable of realizing water repellency to the diaphragm while suppressing an increase in cost.

  In order to achieve the above object, the present invention impregnates a water repellent comprising a fluororesin by impregnating a water repellent comprising a fluororesin during paper making of the paper diaphragm and heating and pressurizing to evaporate water. In this configuration, a diaphragm for a speaker that has been taken into the interior is obtained.

  With this configuration, the water repellent made of fluororesin can be instantly impregnated into the inside of the paper diaphragm, and the cost can be reduced by shortening the water repellent treatment time of the diaphragm. .

  As described above, the present invention can instantly impregnate a paper diaphragm with a water repellent made of a fluororesin, thereby reducing the diaphragm's water repellent treatment time and increasing the cost of the diaphragm. It is possible to reduce the cost of the speaker using this diaphragm.

  Further, the water repellency can be improved because the paper diaphragm is impregnated with a water repellent made of a fluororesin.

  Furthermore, unlike conventional water repellents where the water repellent remains only on the surface, it penetrates uniformly into the inside of the paper diaphragm, so other members that require adhesive bonding to the diaphragm, for example, The water repellent film becomes an obstacle to adhesion of edges, voice coils, dust caps, etc., and the adhesive force is not reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Hereinafter, the first and second aspects of the present invention will be described with reference to the first embodiment.

  FIG. 1 shows a cross-sectional view of a speaker diaphragm according to an embodiment of the present invention.

  As shown in FIG. 1, the speaker diaphragm 27 of the present invention is produced by a papermaking method, impregnated with a water repellent made of a fluororesin during papermaking, and then heated and pressurized to evaporate water.

  Therefore, in the cross section, the water repellent agent made of fluororesin uniformly penetrates into the speaker diaphragm 27 without leaving the water repellent film on the surface of the speaker diaphragm 27 made of paper. It has become.

  In this way, the water-repellent agent made of fluororesin is impregnated at the time of paper making, and then water is evaporated by heating and pressurization, so the water-repellent agent made of fluororesin is taken into the diaphragm and penetrates uniformly. In this state, the speaker diaphragm 27 can be impregnated with a water repellent made of a fluororesin instantaneously. Therefore, the cost of the speaker diaphragm 27 can be reduced by reducing the water repellent treatment time. A reduction in the cost of the speaker using the diaphragm 27 can be realized.

  Further, since the speaker diaphragm 27 is impregnated with a water repellent made of a fluororesin, the water repellency can be further improved.

  Further, unlike the conventional water repellent agent in which the water repellent agent remains only on the surface, it penetrates uniformly into the speaker diaphragm 27, and thus the speaker diaphragm 27 needs to be adhesively bonded. The water repellent film becomes an obstacle to adhesion of other members, for example, edges, voice coils, dust caps, etc., and the adhesive force is not reduced.

  In addition, you may add a crosslinking accelerator to a fluororesin.

  Thus, by adding a crosslinking accelerator, the bond between the material of the speaker diaphragm 27 and the fluororesin as the water repellent can be further strengthened, and the water repellent effect and the waterproof effect can be further enhanced.

  As a result, the water repellency is improved, and the speaker diaphragm 27 excellent in quality and reliability can be obtained.

(Embodiment 2)
Hereinafter, the invention described in claim 3 of the present invention will be described with reference to the second embodiment.

  FIG. 2 shows a cross-sectional view of a speaker according to an embodiment of the present invention.

  As shown in FIG. 2, a magnetized magnet 21 is sandwiched between an upper plate 22 and a yoke 23 to constitute an internal magnet type magnetic circuit 24.

  A frame 26 is coupled to the yoke 23 of the magnetic circuit 24. The outer periphery of the speaker diaphragm 27 according to claim 1 or 2 is bonded to the periphery of the frame 26 via an edge 29. One end of the voice coil 28 is coupled to the central portion of the speaker diaphragm 27, and the other end is coupled so as to fit into the magnetic gap 25 of the magnetic circuit 24.

  In the above, the speaker having the inner magnet type magnetic circuit 24 has been described. However, the present invention is not limited to this, and may be applied to a speaker having an outer magnet type magnetic circuit.

  Furthermore, the present invention can also be applied to a small speaker in which the speaker diaphragm 27 and the edge 29 are integrated.

  With this configuration, as described in Embodiment 1, a speaker diaphragm having sufficient water repellency can be obtained, and a speaker excellent in quality and reliability can be configured at low cost.

(Embodiment 3)
The third aspect of the present invention will be described below with reference to the third embodiment.

  FIG. 3 shows an external view of an audio minicomponent system that is an electronic apparatus according to an embodiment of the present invention.

  As shown in FIG. 3, a speaker system is constructed by incorporating the speaker 30 of the present invention into an enclosure 41, and an amplifier 42, which is an amplifying means for an electric signal input to the speaker, and a source input to the amplifier 42 are provided. An audio mini-component system 44, which is an electronic device, is configured by including a player 43 for output.

  By adopting this configuration, it is possible to create a sound that matches the user-oriented timbre, and to realize a mini component system that is excellent in moisture resistance and water resistance at a low price.

(Embodiment 4)
Hereinafter, the invention according to the fifth aspect of the present invention will be described with reference to the fourth embodiment.

  FIG. 4 shows a cross-sectional view of an automobile 50, which is an apparatus according to an embodiment of the present invention.

  As shown in FIG. 4, an automobile 50 is configured by incorporating the speaker 30 of the present invention into a rear tray or a front panel and using it as a part of car navigation or car audio.

  By adopting this configuration, it is possible to achieve sound creation with a tone color that matches the user's preference for the speaker 30, and to realize a car audio system that is excellent in moisture resistance and water resistance at a low price.

  Therefore, it is possible to reduce the price of a device such as an automobile, and to improve the quality and reliability, and improve the performance and quality of the device such as an automobile equipped with the speaker 30. Can be made.

  The speaker diaphragm, the speaker, the electronic device, and the device according to the present invention can be applied to an electronic device such as an audiovisual device or an information communication device that requires water repellency and water resistance, and an apparatus such as an automobile.

Sectional drawing of the diaphragm for speakers in one embodiment of this invention Sectional drawing of the speaker in one embodiment of this invention 1 is an external view of an electronic device according to an embodiment of the present invention. Sectional drawing of the apparatus in one embodiment of this invention Sectional view of a conventional speaker diaphragm

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Magnet 22 Upper plate 23 Yoke 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 Speaker diaphragm 28 Voice coil 29 Edge 30 Speaker 41 Enclosure 42 Amplifier 43 Player 44 Mini component system 50 Automobile

Claims (5)

A speaker diaphragm mainly composed of a pulp material, wherein the speaker diaphragm is formed by paper making and includes a fluororesin inside. The speaker diaphragm according to claim 1, wherein a crosslinking accelerator is added to the fluororesin. A frame coupled to a magnetic circuit; a speaker diaphragm according to claim 1 or 2 coupled to an outer peripheral portion of the frame; and a portion of the diaphragm coupled to the speaker diaphragm; A speaker comprising a voice coil arranged in a magnetic gap of a magnetic circuit. A frame coupled to a magnetic circuit; a speaker diaphragm according to claim 1 or 2 coupled to an outer peripheral portion of the frame; and a portion of the diaphragm coupled to the speaker diaphragm; An electronic apparatus comprising a speaker comprising a voice coil disposed in a magnetic gap of a magnetic circuit, and at least an amplifier circuit for an input signal to the speaker. A frame coupled to a magnetic circuit; a speaker diaphragm according to claim 1 or 2 coupled to an outer peripheral portion of the frame; and a portion of the diaphragm coupled to the speaker diaphragm; An apparatus comprising a moving means provided with a speaker comprising a voice coil arranged in a magnetic gap of a magnetic circuit.

Images