JP2006020103A - Speaker, speaker case, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker case, a speaker and a method of manufacturing the speaker case which enables the speaker to obtain suitable acoustic characteristics. <P>SOLUTION: The speaker comprises a speaker unit and a case 4 for housing the speaker unit. The case 4 comprises a case body 20, an elastic member 21, and a packing 22. The case body 20 has a mount 25. The elastic member 21 is made of an elastic synthetic resin and disposed between the mount 25 and a frame 2. The packing 22 is made of an elastic synthetic resin and disposed between the case body 20 and the frame 2. The case body 20, the elastic member 21 and the packing 22 are molded integrally. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a speaker case that houses a speaker unit, a speaker, and a method for manufacturing the speaker case.

  Conventionally used speakers include a speaker unit including a vibration unit, a magnetic circuit unit that vibrates the vibration unit to generate sound, and a case that houses the speaker unit. The vibration part includes a voice coil provided in a magnetic gap (to be described later) of the magnetic circuit part, a diaphragm that can vibrate together with the voice coil, and the like.

  The magnetic circuit portion is made of a magnetic material and is formed in an annular shape, and is connected to the diaphragm and the like via a damper, a magnet attached to the yoke plate, a magnetic material, and A yoke that is attached to the magnet and that forms a magnetic gap for generating a magnetic force for driving (vibrating) the diaphragm with the yoke plate.

  The case is formed in a cylindrical shape. The case accommodates the speaker unit in such a manner that the diaphragm is exposed outside the case. The case is fixed to the yoke of the magnetic circuit unit described above.

  In the speaker having the above-described configuration, a voice current is supplied to the voice coil, the voice coil vibrates according to the voice current, and the diaphragm vibrates to generate a sound according to the voice current.

  The case is attached to a frame such as a box installed on a floor such as indoors or a door panel of an automobile as a moving body. For this reason, the case is integrally provided with an attachment portion for attachment to the frame or the like. Further, in the case described above, in order to prevent the vibration of the vibration part, i.e. the diaphragm, from being transmitted to the frame, an elastic member is attached to the attachment part described above, and the outer edge part opposed to the frame is also described above. The packing that adheres to the frame is attached.

  In the conventional speaker described above, the case, the elastic member, and the packing are manufactured separately, and then the elastic member and the packing are attached to the case. For this reason, when attaching to a case, an elastic member, packing, etc. may have shifted. In particular, since the width of the case where the packing of the case is attached is narrow, the packing is easily displaced with respect to the case. When the packing or the elastic member described above is displaced, there may be a problem that the sound quality is deteriorated due to the attachment portion, the case, and the frame not being sealed at the displaced position.

  The objective of this invention is providing the manufacturing method of the case for speakers, the speaker, and the case for speakers from which a speaker can obtain an appropriate acoustic characteristic, for example.

  In order to solve the problems and achieve the object, the speaker case of the present invention according to claim 1 is attached to a frame, and vibrates the vibration part and generates a sound by vibrating the vibration part. And a speaker body that accommodates the speaker unit, and a case main body that is made of synthetic resin and that accommodates the speaker unit and includes an attachment portion attached to the frame, and an elastic synthetic resin An elastic member provided between the mounting portion and the frame, and using the first mold having the first cavity along the outer shape of the case body, the case body The molded case body is positioned in a second cavity along the outer shape of the case body and the elastic member, and the second cavity is formed. It is characterized by obtained by molding integrally with the elastic member and the case body using a second mold having a I.

  According to a third aspect of the present invention, a speaker according to the present invention includes the speaker case according to the first or second aspect.

  According to a fourth aspect of the present invention, there is provided a speaker case manufacturing method comprising: a speaker unit that is attached to a frame, and includes a vibration part; and a magnetic circuit part that vibrates the vibration part to generate sound. In the method for producing a case for a speaker to be accommodated, the case for the speaker is made of a synthetic resin and contains a case main body that accommodates the speaker unit and is provided with an attachment portion that is attached to the frame, and an elastic synthetic resin. And the elastic member provided between the mounting portion and the frame, and the case main body is molded using a first mold having a first cavity along the outer shape of the case main body. Then, the molded case body is positioned in the second cavity along the outer shape of the case body and the elastic member, and the second cavity Is characterized in that molded integrally with the elastic member and the case body using a second mold having a.

  Hereinafter, a speaker case and the like according to an embodiment of the present invention will be described. A speaker case according to an embodiment of the present invention is formed by positioning a case body formed using a first mold in a second cavity and using a second mold. The case body and the elastic member are integrally formed. By doing so, it is possible to prevent the positional deviation between the case body and the elastic member, to prevent the sound quality of the speaker unit from being deteriorated, and to allow the speaker to obtain appropriate acoustic characteristics.

  Further, the second mold may include a third cavity along the outer shape of the packing, and the case main body, the elastic member, and the packing may be integrally formed.

  Furthermore, the present invention may be a speaker provided with a speaker case.

  An embodiment of the present invention will be described with reference to FIGS. A speaker case (hereinafter simply referred to as a case) 4 shown in FIG. 1 constitutes the speaker 1 shown in FIG. A speaker 1 shown in FIG. 2 is attached to a frame 2 (shown in FIG. 2 or the like) such as a door panel or a box installed on a floor (floor), for example, as a panel constituting a vehicle body of a car as a moving body. Sound.

  As shown in FIG. 2, the speaker 1 includes a speaker unit 3 and the case 4 described above. The speaker unit 3 includes a vibrating unit 6 and a magnetic circuit unit 7 that vibrates the vibrating unit 6 and generates sound in the vibrating unit 6.

  The vibration unit 6 includes a voice coil 8, a voice coil bobbin 9, a diaphragm 10, a damper 11, an edge 12, and the like. The voice coil 8 is coaxial with both a later-described yoke 15 and a yoke plate 17 of the magnetic circuit unit 7 and is disposed in a later-described magnetic gap G of the magnetic circuit unit 7. A voice current is supplied to the voice coil 8.

  The voice coil bobbin 9 is formed in a cylindrical shape. The voice coil bobbin 9 is arranged coaxially with the yoke 15, the yoke plate 17 and the voice coil 8. The voice coil bobbin 9 has one end in the axial direction inserted into the magnetic gap G, and the voice coil 8 is attached to the outer periphery of the one end. The voice coil bobbin 9 is supported by the yoke 15 so as to be movable along the axis P of the yoke 15 (indicated by a one-dot chain line in FIG. 2).

  The diaphragm 10 has a thin plate-like center cap 13 having a circular arc shape in cross section and a planar shape formed in a disk shape, and a truncated cone shape (conical frustum shape) when viewed from the side, and a planar shape formed in an annular shape. The thin plate-shaped cone 14 is provided. The cone 14 is arranged coaxially with the center cap 13, that is, the yoke 15, and the inner edge portion is attached to the other end portion of the voice coil bobbin 9. The center cap 13 looks like the voice coil bobbin 9 is closed, and the outer edge portion is attached to the cone 14.

  The damper 11 has a planar shape formed in an annular shape and is formed in a thin plate shape. The damper 11 has an inner edge attached to the voice coil bobbin 9 and an outer edge attached to a center step 23 described later of the case 4. The damper 11 allows the voice coil bobbin 9 to vibrate along the axis P described above, and gradually attenuates the vibration of the voice coil bobbin 9.

  The edge 12 has a planar shape formed in an annular shape and is formed in a thin plate shape. The edge 12 has an inner edge attached to the outer edge of the cone 14 and an outer edge attached to an end step 24 to be described later of the case 4. The edge 12 allows the voice coil bobbin 9 to vibrate along the axis P described above, and gradually attenuates the vibration of the voice coil bobbin 9.

  The magnetic circuit unit 7 includes a yoke 15 made of a magnetic material (so-called paramagnetic material or ferromagnetic material), a magnet 16, and a yoke plate 17 made of a magnetic material (so-called paramagnetic material or ferromagnetic material). ing. The yoke 15 is integrally provided with an annular bottom plate 18 and a cylindrical center pole 19 which stands up from the inner edge of the bottom plate 18 and is coaxial with the bottom plate 18. The outer diameter of the bottom plate 18 is larger than the outer diameter of the center pole 19. The yoke 15 is arranged in such a manner that the end of the center pole 19 on the side away from the bottom plate 18 enters the inside of one end of the voice coil bobbin 9.

  The magnet 16 is formed in an annular shape. The magnet 16 may be excited by a permanent magnet or a DC power source. The magnet 16 is overlaid and fixed on the bottom plate 18 of the yoke 15 with the center pole 19 of the yoke 15 entering inside.

  The yoke plate 17 is formed in an annular shape. The yoke plate 17 is superposed on the magnet 16 with the center pole 19 of the yoke 15 entering inside. The yoke plate 17 is attached to the case 4. The yoke 15, the magnet 16, and the yoke plate 17 are arranged coaxially with each other. Further, the outer peripheral surface of the center pole 19 of the yoke 15 and the inner peripheral surface of the yoke plate 17 are spaced from each other.

  With the above-described configuration, the magnetic circuit unit 7 is configured as a so-called outer magnet type. The magnetic circuit unit 7 drives (vibrates) the diaphragm 10 between the outer peripheral surface of the center pole 19 of the yoke 15 and the inner peripheral surface of the yoke plate 17 in cooperation with the voice coil 8 described above. A magnetic gap G that generates a magnetic force is formed.

  In the speaker unit 3 having the above-described configuration, a voice current is supplied to the voice coil 8 while being accommodated in the case 4, and the voice coil 8 held in the magnetic gap G according to the voice current is connected to the axis described above. Vibrates along the core P. Then, the voice coil bobbin 9 supporting the voice coil 8 vibrates along the axis P together with the center cap 13 and the cone 14 of the diaphragm 10, and the center cap 13 and the cone 14 of the diaphragm 10 respond to the voice current. Produce a sound. As described above, the magnetic circuit unit 7 vibrates the vibration plate 10, that is, the vibration unit 6, and generates sound.

  As shown in FIGS. 1 and 2, the case 4 includes a case body 20 made of a hard synthetic resin, a plurality of elastic members 21, and one packing 22. The case body 20 is provided with stepped portions (hereinafter referred to as a central stepped portion and an end stepped portion) 23 and 24 at the center in the axial direction and at the end in the axial direction, and a cylinder whose inner and outer diameters change in stages. It is formed in a shape. The case 4 is formed such that the inner and outer diameters gradually increase from the central step portion 23 toward the end step portion 24 along the axis. The case main body 20 accommodates the speaker unit 3 described above.

  In addition, the case body 20 is integrally provided with a plurality of attachment portions 25. The attachment portion 25 is provided at the end of the case main body 20 on the large diameter side, and is formed in a flat plate shape extending from the outer surface of the case main body 20 toward the outer direction of the case main body 20. The attachment portion 25 is provided with a hole 27 through which a screw 26 for attaching the speaker 1 to the frame 2 can be passed. The attachment portion 25 is attached to the frame 2 by passing the screw 26 through the hole 27.

  The elastic member 21 is made of a synthetic resin having elasticity such as rubber as an elastic material (elastomer) and is formed in an annular shape. The elastic member 21 is attached to both surfaces of each attachment portion 25. Therefore, the elastic member 21 is provided between the mounting portion 25 and the frame 2 described above when the case 4, that is, the speaker 1 is attached to the frame 2. The elastic member 21 is in close contact with the frame 2. Further, the inner hole 28 of the elastic member 21 is arranged coaxially with the hole 27 of the mounting portion 25 described above. The elastic member 21 covers the inner surface of the hole 27 of the attachment portion 25, and those attached to both surfaces of each attachment portion 25 are integrated.

  The packing 22 is made of a synthetic resin having elasticity such as rubber as an elastic material, and is formed in an annular shape. The packing 22 is attached to the outer edge portion of the case 4 on the large diameter side. The packing 22 is arranged coaxially with the case 4. For this reason, the packing 22 is provided between the case body 20 and the frame 2 described above when the case 4, that is, the speaker 1 is attached to the frame 2. The packing 22 is in close contact with the frame 2.

  In the case 4 having the above-described configuration, the case body 20, the elastic member 21, and the packing 22 are integrally formed as described later. The case 4 accommodates the speaker unit 3. The case 4 looks like the diaphragm 10 is exposed through a hole 29 provided in the frame 2, and screws 26 passed through the holes 27, 28 are screwed into the frame 2, so that the frame 4, as shown in FIG. 2 is fixed. Then, the elastic member 21 and the packing 22 are elastically deformed in the direction in which the thickness is reduced, and are in close contact with the frame 2 and the like.

  The case 4 having the above-described configuration is assembled as follows. First, the 1st metal mold | die 31 provided with the 1st cavity 30 along the external shape of the case main body 20 shown in FIG. 4 is used. As shown in FIG. 5, the synthetic resin heat-fluidized (plasticized) is injected into the first cavity 30 by high pressure through a sprue (not shown) of the first mold 31 and injected. Is cooled and solidified or cured in the first cavity 30. Then, the case body 20 shown in FIG. 6 is taken out from the first cavity 30 of the first mold 31. Thus, first, the case body 20 shown in FIG. 6 is molded using the first mold 31 provided with the first cavity 30 along the outer shape of the case body 20.

  Thereafter, the second mold 32 shown in FIG. 7 is used. In the second mold 32, a second cavity 33 and a third cavity 34 are formed. The 2nd cavity 33 is along the external shape of what combined the case main body 20 and the elastic member 21 of the case 4 mentioned above. The third cavity 34 is continuous with the second cavity 33 and is along the outer shape of the packing 22 described above. Further, when the second cavity 33 and the third cavity 34 are combined, they are along the outer shape of the case 4 described above.

  Then, as shown in FIG. 8, the case body 20 obtained by molding with the first mold 31 described above is positioned in the second cavity 33 of the second mold 32. As shown in FIG. 9, the above-mentioned elastic member 21 and the synthetic resin constituting the packing 22 heated and fluidized (plasticized) are passed through a sprue (not shown) of the second mold 32, and the above-described second cavity is formed by high pressure. The injected synthetic resin is cooled and solidified or cured in the second cavity 33 and the third cavity 34. Then, the case 4 shown in FIG. 10 is taken out from the first cavity 30 of the first mold 31. In this way, the case main body 20, the elastic member 21, and the packing 22 are integrally molded by using the second mold 32 provided with the second cavity 33 and the third cavity 34, and the above-described case shown in FIG. Case 4 having the above-described configuration is obtained.

  According to this embodiment, the case body 20 molded using the first mold 31 is positioned in the second cavity 33, and the case 4 is molded using the second mold 32. For this reason, the case main body 20 and the elastic member 21 can be integrally molded, and the positional deviation between the case main body 20 and the elastic member 21 can be prevented. Therefore, the sound quality of the speaker unit 3 can be prevented from being lowered, and the speaker 1 can obtain appropriate acoustic characteristics.

  The second mold 32 includes a third cavity 34 along the outer shape of the packing 22. For this reason, in addition to the case main body 20 and the elastic member 21, these and the packing 22 can be formed integrally, and the positional displacement of the case main body 20, the elastic member 21 and the packing 22 can be prevented. Therefore, it is possible to reliably prevent the sound quality of the speaker unit 3 from being lowered, and the speaker 1 can reliably obtain appropriate acoustic characteristics.

  Furthermore, since the case main body 20 and the elastic member 21 are integrally formed in the speaker 1, it is possible to prevent positional deviation between the case main body 20 and the elastic member 21. Furthermore, since the case main body 20 and the elastic member 21 and the packing 22 are integrally formed, it is possible to prevent the positional displacement of the case main body 20, the elastic member 21 and the packing 22. Therefore, deterioration of sound quality can be prevented and appropriate acoustic characteristics can be obtained.

  The case 4 of the above-described embodiment is made of a synthetic resin in which the case main body 20 is hard (various deformation such as elastic deformation is difficult or does not deform within the normal use range of the speaker 1). Therefore, the weight of the case 4 can be reduced and the rigidity can be kept high, and the speaker 1 can be securely attached to the frame 2.

  Furthermore, since the case body 20 is made of a synthetic resin, the case 4 can be easily molded and the cost can be reduced. Furthermore, by selecting various synthetic resins, the case 4 can improve heat resistance (or nonflammability and flame retardancy).

  The case 4 of the present invention may be attached to various panels such as a door panel and a rear tray of an automobile, or may be attached to various boxes installed on the floor.

  According to the embodiment described above, the following method for manufacturing the speaker case 4, the speaker 1, and the speaker case 4 can be obtained.

(Additional remark 1) In the case 4 for speakers which accommodates the speaker unit 3 provided with the vibration part 6 and the magnetic circuit part 7 which vibrates the said vibration part 6 and produces a sound while being attached to the flame | frame 2,
A case body 20 made of a synthetic resin and containing the speaker unit 3 and provided with a mounting portion 25 attached to the frame 2;
An elastic member 21 made of a synthetic resin having elasticity and provided between the mounting portion 25 and the frame 2;
After the case body 20 is molded using a first mold 31 having a first cavity 30 that follows the outer shape of the case body 20, the molded case body 20 is connected to the case body 20 and the elastic body. The case body 20 and the elastic member 21 are integrally molded using a second mold 32 that is positioned in a second cavity 33 along the outer shape of the member 21 and has the second cavity 33. A speaker case 4 characterized by being obtained.

(Supplementary Note 2) A packing 22 made of an elastic synthetic resin and provided between the case body 20 and the frame 2 is provided.
The second mold 32 includes a third cavity 34 along the outer shape of the packing 22,
The case body 20 molded using the first mold 31 is positioned in the second cavity 33, and the case body 20, the elastic member 21, and the packing 22 are used using the second mold 32. The speaker case 4 according to appendix 1, which is obtained by integrally molding

  (Supplementary Note 3) A speaker 1 including the speaker case 4 according to Supplementary Note 1 or Supplementary Note 2.

(Additional remark 4) Manufacture of the speaker case 4 which accommodates the speaker unit 3 provided with the vibration part 6 and the magnetic circuit part 7 which vibrates the said vibration part 6 and produces a sound while being attached to the flame | frame 2. In the method
The speaker case 4 is made of a synthetic resin and accommodates the speaker unit 3 and is provided with a case main body 20 provided with an attachment portion 25 attached to the frame 2, and an elastic synthetic resin and the attachment portion 25. And an elastic member 21 provided between the frame 2 and
After the case body 20 is molded using a first mold 31 having a first cavity 30 along the outer shape of the case body 20, the molded case body 20 is connected to the case body 20 and the elastic member. The case main body 20 and the elastic member 21 are integrally molded using a second mold 32 that is positioned in the second cavity 33 along the outer shape of the second cavity 33 and provided with the second cavity 33. A manufacturing method of a case 4 for a speaker as a feature.

(Supplementary Note 5) The speaker case 4 is made of a synthetic resin having elasticity, and includes a packing 22 provided between the case body 20 and the frame 2.
The second mold 32 includes a third cavity 34 along the outer shape of the packing 22,
The case body 20 molded using the first mold 31 is positioned in the second cavity 33, and the case body 20, the elastic member 21, and the packing 22 are used using the second mold 32. The method for manufacturing the speaker case 4 as set forth in appendix 4, characterized in that:

  In addition, the Example mentioned above only showed the typical form of this invention, and this invention is not limited to an Example. That is, various modifications can be made without departing from the scope of the present invention.

It is a perspective view which shows the case for speakers concerning one Example of this invention. FIG. 2 is a cross-sectional view of a speaker or the like provided with the speaker case shown in FIG. 1. It is sectional drawing which shows the state by which the speaker shown by FIG. 2 was attached to the flame | frame. It is sectional drawing of the 1st metal mold | die used when shape | molding the case for speakers shown by FIG. It is sectional drawing which shows the state which shape | molded the case main body using the 1st metal mold | die shown by FIG. FIG. 6 is a cross-sectional view of the case main body shown in FIG. 5. It is sectional drawing of the 2nd metal mold | die used when shape | molding the case for speakers shown by FIG. FIG. 8 is a cross-sectional view illustrating a state in which a case main body is positioned in a second cavity of the second mold illustrated in FIG. 7. It is sectional drawing which shows the state which shape | molded the case using the 2nd metal mold | die shown by FIG. FIG. 10 is a cross-sectional view of the case shown in FIG. 9.

Explanation of symbols

1 Speaker 2 Frame 3 Speaker Unit 4 Case (Speaker Case)
6 Vibrating part 7 Magnetic circuit part 20 Case body 21 Elastic member 22 Packing 25 Mounting part 30 First cavity 31 First mold 32 Second mold 33 Second cavity 34 Third cavity

Claims (5)

In a speaker case that houses a speaker unit that is attached to a frame and includes a vibration unit and a magnetic circuit unit that vibrates the vibration unit to generate sound,
A case body made of synthetic resin and containing the speaker unit, and provided with a mounting portion attached to the frame;
An elastic member made of a synthetic resin having elasticity and provided between the mounting portion and the frame;
After forming the case main body using a first mold having a first cavity along the outer shape of the case main body, the molded case main body follows the outer shape of the case main body and the elastic member. A speaker case characterized by being obtained by integrally molding the case main body and the elastic member using a second mold having the second cavity, which is positioned in the second cavity. . It is made of a synthetic resin having elasticity, and includes a packing provided between the case body and the frame,
The second mold includes a third cavity along the outer shape of the packing,
A case body molded using the first mold is positioned in the second cavity, and the case body, the elastic member, and the packing are integrally molded using the second mold. The speaker case according to claim 1, wherein the speaker case is obtained.   A speaker comprising the speaker case according to claim 1. In a method of manufacturing a speaker case that houses a speaker unit that is attached to a frame and includes a vibration unit and a magnetic circuit unit that vibrates the vibration unit to generate sound.
The speaker case is made of a synthetic resin and accommodates the speaker unit and is provided with a mounting portion attached to the frame, and is made of a synthetic resin having elasticity and between the mounting portion and the frame. An elastic member provided in
After forming the case main body using a first mold having a first cavity along the outer shape of the case main body, the molded case main body is formed into a first shape along the outer shape of the case main body and the elastic member. A method for manufacturing a speaker case, wherein the case main body and the elastic member are integrally formed using a second mold provided with the second cavity. The speaker case is made of a synthetic resin having elasticity, and includes a packing provided between the case body and the frame,
The second mold includes a third cavity along the outer shape of the packing,
A case main body formed using the first mold is positioned in the second cavity, and the case main body, the elastic member, and the packing are integrally formed using the second mold. The method for manufacturing a speaker case according to claim 4.

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