JP2011066674A - Diaphragm for speaker, and speaker using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve both higher power of input and improvement of sound quality in a speaker having a large aspect ratio in particular about a diaphragm for a speaker used in various acoustic apparatuses and the speaker using the same. <P>SOLUTION: An edge, a lower gasket and an upper gasket are made of the same material and molded integrally with an outer circumferential part of the a diaphragm body to form a diaphragm for a speaker. Therefore, a roll outer circumferential part of the edge being a movable part is separated from a frame by dimensions corresponding to material thickness of the lower gasket so as to eliminate defectives due to the occurrence of hitting sound. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a speaker diaphragm used in various acoustic devices.

  Conventionally, this type of speaker diaphragm has a configuration as shown in FIGS.

  6 and 7 are cross-sectional views of a conventional diaphragm.

  In FIG. 6, reference numeral 11 denotes a papermaking diaphragm main body made of softwood pulp, which is configured by joining the outer peripheral portion of the diaphragm main body 11 with an edge 12 made of cloth, foamed urethane, etc. The sheet paper 13 is provided with a cushion 14 for keeping the front and back of the diaphragm airtight.

  FIG. 7 shows a speaker diaphragm in which an edge is insert-molded to improve sound quality and assembly accuracy in recent years. The edge 15 is formed by integrally molding the outer periphery of the diaphragm body 11 with rubber. An arrow paper 13 is provided on the outer peripheral flat part of the outer periphery of the sheet, and a cushion 14 is provided on the arrow paper 13 to keep the front and back of the diaphragm airtight.

  As prior art document information relating to the invention of this application, for example, Patent Document 1 and Patent Document 2 are known.

Japanese Unexamined Patent Publication No. 7-15793 Japanese Utility Model Publication No. 60-181993

  However, in the above-described conventional configuration, for example, in a case where a rectangular shape with a large aspect ratio of a speaker aperture used for a large screen television or the like and a high power input is desired, a bonding range between the edge outer peripheral flat part and the frame In spite of the fact that the vibration plate and the edge are greatly oscillated even though it cannot be sufficiently secured, defective products are frequently generated due to the occurrence of a flapping sound between the outer edge of the edge roll and the frame. It had a problem.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a loudspeaker diaphragm that does not cause a defective product due to a hitting sound.

  In order to achieve the above object, the present invention provides a lower sheet paper on the lower side of the outer peripheral part of the edge, further provided an upper paper sheet on the upper side of the outer peripheral part of the edge, and the edge, the lower paper sheet, and the upper paper sheet. The speaker diaphragm is configured by being formed of the same material and integrally formed with the outer peripheral portion of the diaphragm main body.

  By adopting this configuration, it becomes possible to separate the outer peripheral part of the roll, which is a movable part, from the frame by a dimension corresponding to the thickness of the down arrow paper, and eliminate defective products due to the occurrence of hitting sound. The effect that it can be obtained.

  The speaker diaphragm according to the present invention can move the edge outer periphery of the edge, which is a movable part, from the frame by a dimension corresponding to the thickness of the down arrow paper, This produces an effect that defective products due to the occurrence of a hitting sound with the frame can be eliminated.

Sectional drawing of the diaphragm for speakers of the present invention Sectional drawing of speaker diaphragm and mold in Embodiment 1 of the present invention Sectional drawing which shows the example of the diaphragm for other speakers and metal mold | die in the same embodiment Sectional drawing of speaker diaphragm and mold in Embodiment 1 of the present invention Sectional drawing of the speaker in Embodiment 2 of this invention Sectional view of a conventional speaker diaphragm Sectional drawing of other embodiment in the diaphragm for conventional speakers

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

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

  FIG. 1 is a cross-sectional view of a speaker diaphragm of the present invention, FIG. 2 is a cross-sectional view of a speaker diaphragm and a mold according to Embodiment 1 of the present invention, and FIG. 3 is another speaker for the same embodiment. It is sectional drawing which shows the example of a diaphragm and a metal mold | die.

  In FIG. 1 and FIG. 2, reference numeral 1 denotes a diaphragm main body, which is typically a papermaking diaphragm made of softwood pulp or a resin diaphragm formed by injection molding.

  The diaphragm main body 1 is positioned by a mold 5 having a positioning structure, and is held by the mold 5 and one mold 6. By placing a flexible polymer material on the outer periphery of the diaphragm body in advance, when pressed by the mold 5 and the mold 6, the edge 2 and down arrow paper are formed in the gap between the mold 5 and the mold 6. 3A and upper arrow paper 3B are integrally formed as arrow paper 3.

  Here, as a polymer material, a rubber-based material is used as a representative, and a soft synthetic resin-based material, a synthetic fiber-based material, or a cellulose-based material is used. As a frequently used material, SBR, NBR, foamed rubber, and elastomer are used. These are selected in consideration of their flexibility, airtightness, sound quality, etc. according to their usage requirements.

  That is, as the structure of the speaker diaphragm, an edge 2 is provided on the outer peripheral portion of the diaphragm main body 1, a portion corresponding to the lower sheet paper 3A is provided below the outer peripheral portion of the edge 2, and the edge 2 A portion corresponding to the upper arrow paper 3B is provided on the upper side of the outer peripheral portion of the sheet, and the edge 2, the portion corresponding to the lower arrow paper 3A, and the portion corresponding to the upper arrow paper 3B are made of the same material, and the diaphragm main body 1 is integrally formed with the outer peripheral portion of 1.

  The speaker diaphragm is characterized by having a portion corresponding to the down arrow paper 3A so that when the speaker diaphragm is coupled to the frame, the outer periphery of the roll of the edge 2 which is a movable part The portion can be separated from the frame by a dimension corresponding to the thickness of the sheet paper 3A, and the defective product due to the occurrence of a hit sound between the roll outer peripheral portion of the edge 2 and the frame can be eliminated. It is what you play.

  In addition, if the thickness corresponding to the down arrow paper 3A is 0.5 mm or more, a sufficient effect can be obtained.

  If it is 0.5 mm or less, the effect of reducing the adhesive displacement between the roll outer peripheral portion of the edge 2 and the frame is reduced, and the effect is reduced. It becomes large and it becomes difficult to realize thinning.

  Furthermore, by insert-molding the outer peripheral portion of the diaphragm main body 1 to the edge 2, it is possible to increase the coupling strength, to withstand a larger input, and to realize further higher power.

  By using a papermaking diaphragm as the material of the diaphragm main body 1, it is possible to improve the degree of freedom of characteristics and sound quality, and to realize the characteristics and sound making that meet market needs.

  On the other hand, by using a resin diaphragm as the material of the diaphragm main body 1, environmental resistance such as productivity, moisture resistance, and water resistance can be improved.

  Furthermore, by using a material made of bamboo for the papermaking diaphragm and resin diaphragm, the strength of the diaphragm can be improved from its physical properties, and good sound quality, quality and reliability can be improved, In addition, good environmental response can be realized.

  Therefore, a great synergistic effect can be achieved with improved sound quality, improved quality and reliability, improved productivity, and improved environmental response.

  In this embodiment, a circular or oval hole is provided at the center of the diaphragm main body to be connected to the voice coil. However, as another example, a hole is provided as shown in FIG. The same effect can be obtained even if the speaker diaphragm is formed as a passive radiator.

  As described above, the edge 2, the lower arrowhead 3A, and the upper arrowhead 3B are made of a flexible material, thereby improving the original sound reproduction ability and using the same flexible material. By configuring the lower sheet paper 3A and the upper sheet paper 3B, it is possible to reduce the conventionally used cushion, and it is also possible to exhibit the cost reduction effect by improving productivity and reducing the number of parts.

  As such a material having high flexibility, a polymer material is particularly desirable, and particularly excellent effects can be exhibited in flexibility, environmental resistance, airtightness securing as a substitute for a cushion, and vibration suppressing effect.

  As described above, the example in which the edge, the lower arrow paper, and the upper arrow paper are configured by press-molding the material in the mold has been described. Next, the edge and the lower arrow paper are formed by injection molding the material into the mold. The contents of the upper arrow paper will be described.

  FIG. 4 is a cross-sectional view of the speaker diaphragm and the mold.

  In FIG. 4, the difference from the above example is that a gate 7 for injecting a flexible material is provided on the outer side of the edge outer peripheral flat part or on the outer peripheral part of the lower arrow paper or the upper arrow paper.

  With this configuration, a flexible material is injected from the gate 7 into the gap between the molds 5 and 6, and the edge 2, the lower arrowhead 3 </ b> A, and the upper arrowhead 3 </ b> B are injected into the gap between the molds 5 and 6. Are integrally molded.

  Even in the configuration as described above, the same effect as in the above example can be obtained.

  It is also possible to integrally form the edge 2, the lower sheet paper 3A, and the upper sheet paper 3B at the same time as the diaphragm body 1, and in this case, the productivity can be remarkably improved and the cost can be greatly reduced. The effect can be demonstrated.

(Embodiment 2)
The second aspect of the present invention will be described below with reference to the eleventh aspect of the present invention.

  FIG. 5 is a cross-sectional view of the speaker according to Embodiment 2 of the present invention.

  As shown in FIG. 5, 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 diaphragm 27 according to any one of claims 1 to 10 is bonded to a peripheral portion of the frame 26.

  One end of the voice coil 28 is coupled to the central portion of the diaphragm 27 and the opposite 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.

  With this configuration, as described in the first embodiment, by having a portion corresponding to the down arrow paper 3A, when this speaker diaphragm is coupled to the frame 26, the edge 2 which is a movable portion is used. Can be separated from the frame 26 by a dimension corresponding to the thickness of the down sheet paper 3A, and there is no occurrence of defective products due to the occurrence of a hit sound between the roll outer periphery of the edge 2 and the frame 26. The defective rate can be reduced, the productivity can be improved, and the speaker can be excellent in terms of environment and cost.

  This effect is particularly effective for rectangular speakers having a large aspect ratio of the speaker aperture, and it is possible to increase the power of these rectangular speakers.

  The loudspeaker diaphragm according to the present invention can be applied to a loudspeaker that prevents generation of a hit sound between an edge and a frame.

DESCRIPTION OF SYMBOLS 1 Diaphragm main body 2 Edge 3 Arrow paper 3A Lower arrow paper 3B Upper arrow paper 5 Mold 6 Mold 7 Gate 11 Diaphragm main body 12 Edge 13 Arrow paper 14 Cushion 21 Magnet 22 Upper plate 23 Yoke 24 Magnetic circuit 25 Magnetic gap 26 Frame 27 Diaphragm 28 Voice coil

Claims (11)

A speaker diaphragm having an edge on the outer periphery of the diaphragm main body, a lower arrow paper provided below the outer periphery of the edge, and an upper arrow paper provided above the outer periphery of the edge, The speaker diaphragm is a speaker diaphragm in which the edge, the lower arrow paper, and the upper arrow paper are made of the same material and are integrally formed with an outer peripheral portion of the diaphragm main body. The speaker diaphragm according to claim 1, wherein a thickness corresponding to the down arrow paper is 0.5 mm or more. 2. The loudspeaker diaphragm according to claim 1, wherein the outer peripheral portion of the diaphragm main body is insert-molded. 2. The loudspeaker diaphragm according to claim 1, wherein the diaphragm main body is a papermaking diaphragm. 2. The loudspeaker diaphragm according to claim 1, wherein the diaphragm main body is made of a resin diaphragm. The speaker diaphragm according to claim 1, wherein the edge, the lower arrow paper, and the upper arrow paper are made of a flexible material. 2. The speaker diaphragm according to claim 1, wherein the edge, the lower arrow paper, and the upper arrow paper are made of a polymer material. The speaker diaphragm according to claim 1, wherein the edge, the lower arrow paper, and the upper arrow paper are configured by press molding the material in a mold. 2. The speaker diaphragm according to claim 1, wherein the edge, the lower arrow paper, and the upper arrow paper are configured by injection molding the material into a mold. The speaker diaphragm according to claim 1, wherein the edge, the lower arrow paper, and the upper arrow paper are integrally formed simultaneously with the diaphragm main body. A frame coupled to the magnetic circuit; a speaker diaphragm according to claim 1 coupled to an outer periphery of the frame; and a portion of the diaphragm coupled to the speaker diaphragm and a magnetic gap of the magnetic circuit. A speaker composed of arranged voice coils.

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