JP2008022174A - Sound absorption member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate a mounting work of a sound absorption member to be mounted to the outer periphery of a diaphragm of a speaker. <P>SOLUTION: The sound absorption member 100 comprises a main body 10 and an irregular portion 20. The main body 10 is assumed to have, for example, a rectangular parallelepiped shape. The concavo-convex portion 20 comprises convex portions 21 and concave portions 22 which are alternately formed on a plane 11 of the main body 10 from an end (a position corresponding to a plane 14) to an end (a position corresponding to a plane 15). The convex portions 21 and concave portions 22 are assumed to have a shape of, for example, a triangle pole which has bottom faces in planes 12 and 13 of the main body and is formed parallel to one side 11a of the plane 11. The convex portions 21 and the convex portions 22 are adjacent to each other to share a side face of the triangle pole. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sound-absorbing member that blocks sound leakage, and more particularly to a sound-absorbing member that facilitates the work of attaching to a speaker.

  FIG. 5 is a diagram showing the structure of the front door 900 of the automobile. FIG. 5A is a perspective view of a front door 900 of an automobile. In general, the speaker 950 (not shown) is built in the position of the speaker cover 910 in the front door 900 of the automobile shown in FIG. FIG. 5B is an EE cross-sectional view. The front door 900 includes a door outer member 920 that forms the outside of the front door 900 of the automobile, a door inner member 930 that forms the inside of the front door 900 of the automobile, and a space between the door outer member 920 and the door inner member 930. The speaker installation member 940 provided on the speaker and the speaker cover 910 that is a cover of the speaker 950 are provided at least.

  The speaker 950 is fixed by fastening the speaker fixing portion 960 and the speaker installation member 940 with the speaker attachment member 970. In this case, the speaker 950 is located in a space between the door outer member 920 and the speaker installation member 940. The diaphragm 980 is located near the opening 941 of the speaker installation member 940. In the case of the structure of the front door 900, the sound generated by the vibration of the diaphragm 980 is transmitted in the arrow direction shown in FIG.

  Of the transmitted sound, the sound transmitted between the door inner member 930 and the speaker installation member 940 vibrates the door inner member 930 and the speaker installation member 940, and the vibration vibrates each member of the front door 900 of the automobile. It was. As a result, the quality of the sound transmitted to the car was lowered.

In order to solve the above problems, a diaphragm 980 of the speaker 950 is conventionally formed into a cylindrical shape by combining both end faces 991 and 992 of a rectangular parallelepiped sound absorbing member 990 as shown in FIG. A technique has been proposed in which the sound is transmitted so as to surround and blocks sound transmitted from the speaker 950 to the space between the door inner member 930 and the speaker installation member 940 (see, for example, Non-Patent Document 1).
"Professional use only 2006-2007 MOBILE ART" Pioneer Mobile North Japan, Pioneer Mobile West Japan, Pioneer Mobile Kyushu, page 2 SP seal packing material D68 PTB-839.

  However, in the above-described prior art, since the sound absorbing member 990 has a rectangular parallelepiped shape, it is difficult to attach the sound absorbing member 990 so as to surround the diaphragm 980 of the speaker 950. That is, when the sound absorbing member 990 is attached so as to surround the diaphragm 980 of the speaker 950, the rectangular parallelepiped sound absorbing member 990 has a cylindrical shape. However, since the cylindrical shape has a difference in inner diameter and outer diameter, the rectangular parallelepiped shape If it is going to make a thing into a cylindrical shape, distortion will arise in the shape like the inner side surface of the sound-absorbing member 990 shown on the left side of FIG.

  Accordingly, an object of the present invention is to provide a sound-absorbing member that facilitates the work of attaching the speaker near the outer periphery of the diaphragm.

  The present invention has been made to solve the above problems, and the sound absorbing member of the present invention is a sound absorbing member attached so as to surround the diaphragm along the vicinity of the outer periphery of the diaphragm constituting the speaker. The inner side surface of the sound absorbing member that surrounds the vicinity of the outer periphery of the plate has a shape in which convex portions and concave portions are alternately formed along the outer peripheral direction of the diaphragm. This brings about the effect | action that the attachment operation | work of the sound absorption member attached near the outer periphery of the diaphragm of a speaker is made easy.

  In the sound absorbing member of the present invention, the convex part and the concave part have a shape that continues from the upper end surface to the lower end surface of the sound absorbing member. This brings about the effect | action that the attachment operation | work of the sound absorption member attached to the outer periphery vicinity of the diaphragm of a speaker is made easier.

  In the sound absorbing member of the present invention, the convex portion and the concave portion have a triangular prism shape or a trapezoidal column shape continuous from the upper end surface to the lower end surface of the sound absorbing member. This brings about the effect | action of making manufacture of a sound absorption member easy.

  Further, in the sound absorbing member of the present invention, the sound absorbing member has the same length as one side of a predetermined surface of the sound absorbing member main body portion having a rectangular parallelepiped shape and the sound absorbing member main body portion, and one side of the predetermined surface A sound absorbing member uneven portion provided by alternately arranging the convex portions and concave portions provided on the predetermined surface in parallel with each other along a direction perpendicular to one side of the predetermined surface. When the member is attached along the vicinity of the outer periphery of the diaphragm, the sound absorbing member is attached such that the uneven portion of the sound absorbing member is located on the inner side surface of the sound absorbing member. This brings about the effect | action of making manufacture of a sound absorption member easy.

  In the sound absorbing member of the present invention, the sound absorbing member is formed of low-resilience urethane. Thereby, regardless of the shape of the place where the sound absorbing member is attached, the operation of attaching the sound absorbing member attached near the outer periphery of the diaphragm of the speaker is brought about.

  According to the present invention, an excellent effect of facilitating the mounting work of the sound absorbing member that is mounted near the outer periphery of the diaphragm of the speaker can be achieved.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of a sound absorbing member 100 according to an embodiment of the present invention. Note that the sound absorbing member in the present invention refers to a member made of a material that suppresses reflection of sound or prevents sound leakage by absorbing sound or the like. As a material of the sound absorbing member in the embodiment of the present invention, for example, low resilience urethane is assumed, but the material is not limited to this.

  FIG. 1A is a perspective view of a sound absorbing member 100 in the embodiment of the present invention. The sound absorbing member 100 includes a sound absorbing member main body portion 10 and a sound absorbing member uneven portion 20. For example, a rectangular parallelepiped shape is assumed as the shape of the sound absorbing member main body 10, but the shape is not limited thereto. If the shape of the sound-absorbing member body 10 is a rectangular parallelepiped shape, for example, when the sound-absorbing member 100 is formed of low-resilience urethane, there is an advantage that the sound-absorbing member 100 is easily manufactured because the processing of the low-resilience urethane is facilitated.

  An adhesive is applied to the surface 12 of the sound absorbing member main body 10, and an adhesive cover 30 is stretched on the surface 12 in order to maintain the adhesiveness of the adhesive. When the adhesive is applied to the surface 12, for example, a method of spraying the adhesive onto the surface 12 from the outside is assumed, but the present invention is not limited to this, and a double-sided tape may be applied to the surface 12 in the sound absorbing member main body 10.

  When the double-sided tape is stretched on the surface 12, it is necessary to form the double-sided tape in the shape of the adhesive cover 30 shown in FIG. 1A, but the double-sided tape is formed in the shape of the adhesive cover 30 shown in FIG. Since the work to do is time-consuming, it is preferable to use a method of covering the adhesive cover 30 after spraying the adhesive onto the surface 12 from the outside.

  In the surface 11 of the sound absorbing member main body 10, the sound absorbing member concavo-convex portions 20 are alternately formed with convex portions 21 and concave portions 22 from the end of the surface 11 (position corresponding to the surface 14) to the end (position corresponding to the surface 15). It is the uneven part made. As the shape of the convex portion 21 and the concave portion 22, for example, it is assumed that the surfaces 12 and 13 of the sound absorbing member main body portion 10 have bottom surfaces and are triangular prisms formed in parallel with the one side 11 a of the surface 11. It is not limited to. Other shapes of the convex portion 21 and the concave portion 22 may be a triangular prism shape having a bottom surface on the surfaces 12 and 13 and a predetermined angle with the one side 11a of the surface 11.

  FIG.1 (b) is the figure which looked at the sound absorption member 100 in embodiment of this invention from the surface 12 direction. The sound absorbing member uneven portion 20 has a shape in which convex portions 21a, concave portions 22a, convex portions 21b, concave portions 22b and the like are arranged in order from the end. That is, the sound absorbing member uneven portion 20 has a shape in which the convex portions 21 and the concave portions 22 are alternately arranged.

  The convex portion 21b is adjacent to the concave portions 22a and 22b so that the triangular prism side surfaces 23 and 24 of the convex portion 21b are shared with the triangular prism side surface 25 of the concave portion 22a and the triangular prism side surface 26 of the concave portion 22b, respectively. That is, the convex portion 21 and the concave portion 22 are adjacent to each other so as to share the side surface of the triangular prism.

  FIG. 2 is a view showing the sound absorbing member 100 in which the surface 14 and the surface 15 of the sound absorbing member 100 according to the embodiment of the present invention are combined into a cylindrical shape. FIG. 2A is a perspective view of the sound absorbing member 100 formed by combining the surface 14 and the surface 15 of the sound absorbing member 100 into a cylindrical shape. When the surface 14 and the surface 15 are combined, the sound absorbing member 100 has a cylindrical shape.

  And the sound absorption member uneven | corrugated | grooved part 20 is located in a cylindrical inner side surface. Further, the triangular prism-shaped convex portions 21 and the concave portions 22 provided in the sound absorbing member uneven portion 20 have bottom surfaces on the cylindrical upper end surface and lower end surface. Further, the convex portions 21 and the concave portions 22 are arranged alternately along the circumferential direction of the cylindrical shape.

  The sound absorbing member 100 is a member attached near the outer periphery of the diaphragm of the speaker as described in FIG. When the sound absorbing member 100 is attached near the outer periphery of the diaphragm of the speaker, the surface 12 coated with the adhesive of the sound absorbing member 100 is pasted near the outer periphery of the diaphragm of the speaker. In this case, the upper end surface of the sound absorbing member 100 is the surface 13 and the lower end surface of the sound absorbing member 100 is the surface 12.

  FIG. 2B is a plan view of the sound absorbing member 100 of FIG. When the sound absorbing member uneven portion 20 in the sound absorbing member 100 is positioned on the inner side surface of the cylindrical shape, it becomes easy to make the sound absorbing member 100 cylindrical.

  As described above, since the diameter of the cylindrical inner side surface and the diameter of the outer side surface are different, it is difficult to form a cylindrical shape using a rectangular parallelepiped shape. If the cylindrical inner side surface is made the sound absorbing member 100 in the embodiment of the present invention, the force exerted between the materials on the inner side surface can be released, so that the inner side surface is not distorted and the sound absorbing member 100 is cylindrical. It becomes easy to form into a shape.

  FIG. 3 is a diagram showing a state in which the sound absorbing member 100 according to the embodiment of the present invention is attached to the speaker 800. FIG. 3A shows a front door 700 of an automobile. The sound absorbing member 100 in the embodiment of the present invention is installed on a speaker 800 (not shown) built in the front door 700, for example. When the sound absorbing member 100 is installed on the speaker 800 (not shown), the speaker cover 710 is removed and attached to the speaker 800 (not shown). That is, the sound absorbing member 100 is located inside the speaker cover 710.

  FIG.3 (b) is FF sectional drawing of Fig.3 (a). The front door 700 includes a door outer member 720 that forms the outside of the front door 700 of the automobile, a door inner member 730 that forms the interior of the front door 700 of the automobile, and a space between the door outer member 720 and the door inner member 730. The speaker mounting member 740 provided on the speaker and the speaker cover 710 which is a cover of the speaker 800 are provided at least.

  The speaker 800 is fixed by fastening the speaker fixing portion 810 and the speaker installation member 740 with the speaker attachment member 750. In this case, the speaker 800 is located in a space between the door outer member 720 and the speaker installation member 740. The diaphragm 820 is located near the opening 741 of the speaker installation member 740.

  When attaching the sound absorbing member 100 in the embodiment of the present invention, for example, the surface 12 on which the adhesive of the sound absorbing member 100 is applied is attached to a position adjacent to the speaker 800 in the speaker installation member 740. As a result, the sound absorbing member 100 is attached along the vicinity of the outer periphery of the diaphragm 820 and surrounds the diaphragm 820. When the surface 12 of the sound absorbing member 100 is attached to a position adjacent to the speaker 800 in the speaker installation member 740, it is desirable that the surface 13 of the sound absorbing member 100 be in contact with the door inner member 730. In addition, when the sound absorbing member 100 is attached, the sound absorbing member uneven portion 20 is attached to the inner side surface of the sound absorbing member 100 as shown on the left side of FIG.

  Note that the mounting structure of the speaker 800 shown in FIG. 3B is an example, and the sound absorbing member 100 is mounted along the vicinity of the outer periphery of the diaphragm 820 in other mounting structures of the speaker 800 as well. In addition, when the structure of the portion to which the sound absorbing member 100 is attached is a structure in which the sound absorbing member 100 is difficult to attach, if the low resilience urethane is used as the material of the sound absorbing member 100, the sound absorbing member 100 is used regardless of the shape of the place where the sound absorbing member 100 is attached. The mounting work becomes easier.

  The sound absorbing member 100 according to the embodiment of the present invention is attached along the vicinity of the outer periphery of the diaphragm 820 so as to surround the diaphragm 820, so that the sound emitted from the diaphragm 820 of the speaker 800 is generated by the door inner member 730 and the speaker installation member. It is possible to prevent transmission to the space between the 740 and the 740. Accordingly, it is possible to prevent unnecessary vibration from being transmitted to the door inner member 730 and the speaker installation member 740, and it is possible to provide a high-quality sound in the vehicle.

  In addition, when a shape in which the convex portions 21 and the concave portions 22 are alternately arranged on a predetermined surface of the rectangular parallelepiped sound absorbing member 100 is provided, the shape of the inner side surface of the sound absorbing member 100 is not distorted. The installation work along the outer periphery becomes easy. Moreover, when the shape where the convex part 21 and the recessed part 22 were alternately arranged in the inner side surface after attaching the sound-absorbing member 100 is provided, the sound pressure and sound range of the sound emitted through the diaphragm 820 of the speaker 800 are provided. There is also an effect that changes are easily obtained.

  FIG. 4 is a diagram showing an example of the sound absorbing members 200 and 300 in another embodiment of the present invention. FIG. 4A is a perspective view of the sound absorbing member 200. The sound absorbing member 200 includes a sound absorbing member main body portion 210 and a sound absorbing member uneven portion 220. The sound absorbing member main body 210 in the sound absorbing member 200 is the same as the sound absorbing member main body 10 in the sound absorbing member 100 described in FIG.

  The difference between the sound absorbing member 200 and the sound absorbing member 100 described with reference to FIG. 1 is the shape of the convex and concave portions of the sound absorbing member uneven portion 220 and the sound absorbing member uneven portion 20. The shape of the convex portion 221 in the sound absorbing member 200 is a trapezoidal column shape having a bottom surface on the surface 224 and the surface 225. In addition, the shape of the recess 222 is a triangular prism shape having bottom surfaces on the surface 224 and the surface 225.

  FIG. 4B is a perspective view of the sound absorbing member 300. The sound absorbing member 300 includes a sound absorbing member main body portion 310 and a sound absorbing member uneven portion 320. The sound absorbing member main body 310 in the sound absorbing member 300 is the same as the sound absorbing member main body 10 in the sound absorbing member 100 described in FIG.

  The difference between the sound absorbing member 300 and the sound absorbing member 100 described with reference to FIG. 1 is the shape of convex portions and concave portions in the sound absorbing member uneven portion 320 and the sound absorbing member uneven portion 20. The shape of the convex portion 321 in the sound absorbing member 300 is a triangular prism shape having bottom surfaces on the surface 324 and the surface 325. In addition, the shape of the recess 322 is a trapezoidal column having a bottom surface on the surface 324 and the surface 325. Moreover, although not shown in figure, the sound-absorbing member which made both the trapezoidal column shape as a shape of a convex part and a recessed part is also considered.

  As described above, according to the embodiment of the present invention, the shape of the inner side surface surrounding the diaphragm 820 of the speaker 800 of the sound absorbing members 100 to 300 is changed to the shape in which the convex portions and the concave portions are alternately provided. The shapes of the inner side surfaces of 100 to 300 are not distorted, and as a result, the work of attaching the sound absorbing members 100 to 300 attached along the vicinity of the outer periphery of the diaphragm 820 can be facilitated. Further, when the shape of the inner side surface surrounding the diaphragm 820 of the sound absorbing members 100 to 300 is changed to a shape in which convex portions and concave portions are alternately provided, the sound pressure and sound range of the sound emitted through the diaphragm 820 of the speaker 800 This also has the effect of making it easier to obtain changes.

  In the embodiment of the present invention, the shape of the convex portions and the concave portions in the sound absorbing members 100 to 300 is shown as the triangular prism shape and the trapezoidal column shape. It is not limited to those.

  The embodiment of the present invention shows an example for embodying the present invention, and the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. .

  As an application example of the present invention, for example, the present invention can be applied to prevent vibration caused by sound emitted from a speaker built in a front door of an automobile from being transmitted to each member of the front door.

It is a figure which shows an example of the sound absorption member 100 in embodiment of this invention. It is a figure which shows the sound-absorbing member 100 shape | molded in the cylindrical shape combining the surface 14 and the surface 15 of the sound-absorbing member 100 in embodiment of this invention. It is a figure which shows a mode that the sound absorption member 100 in embodiment of this invention was attached to the speaker 800. FIG. It is a figure which shows an example of the sound absorption members 200 and 300 in another embodiment of this invention. It is a figure which shows the structure of the front door 900 of a motor vehicle.

Explanation of symbols

10, 210, 310 Sound-absorbing member main body 20, 220, 320 Sound-absorbing member uneven portion 21, 21a, 21b, 221, 321 Convex portion 22, 22a, 22b, 222, 322 Concavity 30 Adhesive cover 100, 200, 300 Sound-absorbing member 700 Front door 710 Speaker cover 720 Door outer member 730 Door inner member 740 Speaker installation member 741 Opening 750 Speaker mounting member 800 Speaker 810 Speaker fixing portion 820 Vibration plate

Claims (5)

A sound-absorbing member attached so as to surround the diaphragm along the vicinity of the outer periphery of the diaphragm constituting the speaker;
The sound absorbing member, wherein the shape of the inner side surface of the sound absorbing member surrounding the periphery of the diaphragm is a shape in which convex portions and concave portions are alternately formed along the outer peripheral direction of the diaphragm.   The sound absorbing member according to claim 1, wherein the convex portion and the concave portion have a shape that continues from an upper end surface to a lower end surface of the sound absorbing member.   The sound absorbing member according to claim 2, wherein the convex portion and the concave portion have a triangular prism shape or a trapezoidal column shape continuous from the upper end surface to the lower end surface of the sound absorbing member. The sound absorbing member is
A sound-absorbing member body having a rectangular parallelepiped shape;
The convex portion and the concave portion having the same length as one side of the predetermined surface in the sound absorbing member main body and provided on the predetermined surface in parallel with the one side of the predetermined surface are the predetermined surface. Sound uneven member uneven portions provided alternately arranged along a direction perpendicular to one side of
3. The sound absorbing member according to claim 2, wherein when the sound absorbing member is attached along the vicinity of the outer periphery of the diaphragm, the sound absorbing member is attached so that the uneven portion of the sound absorbing member is located on an inner side surface of the sound absorbing member. . 5. The sound absorbing member according to claim 1, wherein the sound absorbing member is made of low-resilience urethane.

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