WO2014076885A1 - Loudspeaker and electronic device and mobile device using same - Google Patents

Loudspeaker and electronic device and mobile device using same Download PDF

Info

Publication number
WO2014076885A1
WO2014076885A1 PCT/JP2013/006251 JP2013006251W WO2014076885A1 WO 2014076885 A1 WO2014076885 A1 WO 2014076885A1 JP 2013006251 W JP2013006251 W JP 2013006251W WO 2014076885 A1 WO2014076885 A1 WO 2014076885A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
yoke
loudspeaker
loudspeaker according
claw
Prior art date
Application number
PCT/JP2013/006251
Other languages
French (fr)
Japanese (ja)
Inventor
池山　順三
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to CN201390000882.0U priority Critical patent/CN204559869U/en
Publication of WO2014076885A1 publication Critical patent/WO2014076885A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • This technical field relates to a loudspeaker used for in-vehicle use or various acoustic devices, and an electronic device and a mobile device using the loudspeaker.
  • FIG. 7 is a cross-sectional view of a conventional loudspeaker 9.
  • FIG. 8 is a plan view of the yoke 1 shown in FIG.
  • FIG. 9 is a plan view of an essential part of the frame 6 shown in FIG.
  • FIG. 10 is a plan view of an essential part showing a coupling state between the yoke 1 shown in FIG. 8 and the frame 6 shown in FIG.
  • the loudspeaker 9 includes a frame 6, a magnetic circuit 4 having a magnetic gap 5, a diaphragm 7, and a voice coil 8.
  • the magnetic circuit 4 includes a yoke 1, a magnet 2, and a plate 3. The magnet 2 is sandwiched between the yoke 1 and the plate 3.
  • the outer periphery of the diaphragm 7 is coupled to the peripheral edge of the frame 6.
  • a first end of the voice coil 8 is coupled to the diaphragm 7, and a second end is inserted into the magnetic gap 5.
  • the reliability of the connection between the yoke 1 and the frame 6 is low only by the connection using only the adhesive. Therefore, the yoke 1 and the frame 6 are coupled by providing the yoke 1 with a collar 1A and fitting the collar 1A to the frame 6.
  • the frame 6 includes a protrusion 6A.
  • the yoke 1 includes a flange 1A. Furthermore, the notch part 1B is provided in the collar part 1A.
  • the protrusion 6A is fitted into the notch 1B. Then, after that, the yoke 1 or the frame 6 is rotated so that the positions of the notch 1B and the protrusion 6A are different as shown in FIG. As a result, the portions other than the cutout portion 1B of the flange portion 1A and the projection portion 6A overlap. With this configuration, the yoke 1 is coupled to the frame 6. The yoke 1 and the frame 6 can be joined by insert-molding the flange portion 1A into the frame 6.
  • Patent Document 1 Patent Document 2
  • Patent Document 3 Patent Document 3
  • the loudspeaker of the present invention includes a frame having claws, a magnetic circuit, a diaphragm, and a voice coil.
  • the magnetic circuit includes a magnetic gap, a yoke, and a magnetic part.
  • the magnetic part generates magnetic force.
  • the yoke includes a stepped portion into which the claw is fitted, and is connected to the frame by the claw.
  • the outer periphery of the diaphragm is coupled to the frame.
  • the first end of the voice coil is coupled to the diaphragm, and the second end is inserted into the magnetic gap.
  • a magnetic circuit is couple
  • the loudspeaker of the present invention combines the yoke and the frame by fitting the claw into the stepped portion. That is, the magnetic circuit and the frame are mechanically coupled. Therefore, the coupling strength between the magnetic circuit and the frame is improved, and the quality and reliability of the speaker can be improved.
  • FIG. 1 is a cross-sectional view of a loudspeaker according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of another example loudspeaker according to the exemplary embodiment of the present invention.
  • FIG. 3A is a perspective view of a frame according to the embodiment of the present invention.
  • FIG. 3B is an enlarged cross-sectional view of a main part of the loudspeaker according to the exemplary embodiment of the present invention.
  • FIG. 3C is an enlarged cross-sectional view of a main part of the loudspeaker according to the exemplary embodiment of the present invention.
  • FIG. 4A is a bottom view of the yoke in the embodiment of the present invention.
  • FIG. 4B is a cross-sectional view of another example yoke in the embodiment of the present invention.
  • FIG. 4C is a bottom view of still another example yoke in the embodiment of the present invention.
  • FIG. 5 is an external view of the electronic device in the embodiment of the present invention.
  • FIG. 6 is a conceptual diagram of the mobile device according to the embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of a conventional loudspeaker.
  • FIG. 8 is a plan view of a yoke of a conventional loudspeaker.
  • FIG. 9 is a plan view of a main part of a frame of a conventional loudspeaker.
  • FIG. 10 is a plan view of an essential part showing a coupling state between the yoke shown in FIG. 8 and the frame shown in FIG.
  • the yoke 1 and the frame 6 are joined by an adhesive. That is, the strength of the coupling between the yoke 1 and the frame 6 is determined by the adhesive strength of the adhesive. The long-term reliability of the coupling between the yoke 1 and the frame 6 is determined by the reliability of the adhesive. In particular, under a severe environment such as in-vehicle use, a load such as a large temperature change or long-time vibration is applied to the adhesive. Under such an environment, the adhesive deteriorates. As a result, the yoke 1 may fall off the frame 6.
  • the yoke 1 can be formed by, for example, multistage forging.
  • the yoke 1 has a flange 1A. Therefore, in the process of manufacturing the yoke 1, the number of processing steps is increased to form the flange portion 1A, and the number of processing steps is increased. Therefore, the processing cost of the yoke 1 increases.
  • FIG. 1 is a cross-sectional view of a loudspeaker according to the present embodiment.
  • FIG. 2 is a cross-sectional view of another loudspeaker according to the present exemplary embodiment.
  • the loudspeaker 32 may be a tweeter 32A as shown in FIG.
  • the loudspeaker 32 may be a full range speaker 32B as shown in FIG.
  • the loudspeaker 32 may be a woofer 32C.
  • the 1 and 2 include a frame 26 having a claw 26A, a magnetic circuit 24, a diaphragm 27, and a voice coil 28.
  • the magnetic circuit 24 includes a yoke 21 and a magnetic part 22 that generates a magnetic force.
  • a magnetic gap 25 is formed between the magnetic part 22 and the yoke 21.
  • the yoke 21 includes a step portion 21A.
  • the outer peripheral part of the diaphragm 27 is coupled to the peripheral part of the frame 26.
  • a first end of the voice coil 28 is coupled to the diaphragm 27.
  • the second end of the voice coil 28 is inserted into the magnetic gap 25.
  • the frame 26 includes a claw 26 ⁇ / b> A that connects the yoke 21 and the frame 26.
  • the yoke 1 includes a step portion 21A into which the claw 26A is fitted.
  • the magnetic circuit 24 and the frame 26 can be easily coupled by fitting the claw 26A into the stepped portion 21A. Therefore, the productivity of the loudspeaker 32 can be improved, and the price of the loudspeaker 32 can be reduced. Further, since the magnetic circuit 24 is coupled to the frame 26 by fitting the claw 26A into the stepped portion 21A, the coupling strength between the yoke 21 and the frame 26 is improved. Further, since the frame 26 mechanically holds the yoke 21 with the claws 26 ⁇ / b> A, the yoke 21 can be prevented from falling off the frame 26. Therefore, the reliability of the loudspeaker 32 is improved.
  • the loudspeaker 32 can be lightened.
  • the amount of material used when manufacturing the yoke 21 can be reduced.
  • the amount of raw materials used to manufacture the loudspeaker 32 can be reduced, so that the loudspeaker 32 can contribute to suppressing the destruction of the global environment.
  • the magnetic part 22 includes a magnet 22 ⁇ / b> A in order to generate a magnetic flux in the magnetic gap 25.
  • the first surface of the magnet 22A is mounted on the yoke 21 so that the magnet 22A and the yoke 21 are magnetically coupled.
  • the magnetic unit 22 preferably further includes a plate 23.
  • the magnet 22A and the plate 23 are magnetically coupled. That is, the magnet 22 ⁇ / b> A is sandwiched between the yoke 21 and the plate 23.
  • the magnetic circuit 24 includes a magnetic gap 25 formed between the side surface of the plate 23 and the yoke 21.
  • the first surface is located on the opposite side of the second surface.
  • the magnetic force of the magnet 22A can be concentrated on the magnetic gap 25. Therefore, the magnetic flux density in the magnetic gap 25 is improved. As a result, the loudspeaker 32 has improved sound pressure characteristics and linearity.
  • the magnetic circuit 24 may be composed of only the magnet 22A and the yoke 21.
  • the magnetic circuit 24 includes a magnetic gap 25 formed between the side surface of the magnet 22 ⁇ / b> A and the yoke 21.
  • the magnetic circuit 24 can be made small.
  • the magnetic circuit 24 can be lightened.
  • the plate 23 is unnecessary, the material cost and manufacturing cost of the magnetic part 22 can be reduced. Therefore, the loudspeaker 32 can be small and light.
  • the loudspeaker 32 may be mounted on an automobile or the like.
  • resource reduction is an important issue in order to promote protection of the global environment. For this reason, efforts have been made to improve fuel efficiency by reducing the weight of automobiles and to reduce resources used to manufacture automobiles. Therefore, it is necessary to reduce the resources to be used lightly and also for the in-vehicle speaker mounted in such an automobile.
  • the in-vehicle loudspeaker 32 outputs sound to a large cabin space or the like, a large sound pressure and a large output resistance are required. From the background as described above, it is important that the loudspeaker 32 mainly for in-vehicle use is small and light in addition to a basic customer request that sound pressure and output are large. However, since these characteristics are contradictory, it is difficult to achieve both.
  • the magnetic circuit 24 is preferably an internal magnet type. With this configuration, the magnetic circuit 24 can be made small. Therefore, the loudspeaker 32 can be made small.
  • the magnetic circuit 24 is not limited to the inner magnet type, and may be an outer magnet type or a combination of the inner magnet type and the outer magnet type.
  • the magnet 22A it is preferable to use a neodymium magnet as the magnet 22A. Since the neodymium magnet has a high energy product, the magnet 22A can be made lighter and smaller. Furthermore, even if the magnet 22A is made smaller, the magnetic flux generated by the magnet 22A can be increased. With the above configuration, the magnetic flux density in the magnetic gap 25 can be increased, and the magnetic circuit 24 can be lightened and reduced. Therefore, since the loudspeaker 32 can increase sound pressure and input resistance, the sound quality is excellent. Furthermore, the loudspeaker 32 can be light and small.
  • FIG. 3A is a perspective view of the frame 26.
  • FIG. 3B is an enlarged cross-sectional view of a main part of the loudspeaker 32.
  • FIG. 3C is an enlarged cross-sectional view of another main part of the loudspeaker 32.
  • the frame 26 is made of resin. Resin has a lower specific gravity than metal. Therefore, since the frame 26 can be lightened, the loudspeaker 32 shown in FIGS. 1 and 2 can be lightened.
  • the frame 26 is preferably formed by injection molding. With this configuration, the frame 26 is excellent in productivity. Therefore, the cost of the frame 26 can be reduced.
  • the frame 26 is formed by resin molding, a complicated shape can be easily produced.
  • the material thickness of the frame 26 can be varied depending on the location, the material thickness of the frame 26 where the mechanical strength is not required can be reduced. Therefore, the frame 26 can be further lightened.
  • the frame 26 has a greater degree of freedom in shape than a frame made of metal such as iron produced by pressing. Therefore, the frame 26 having a complicated shape can be manufactured at a lower cost than a metal frame. Therefore, the frame 26 and the claw 26A are preferably molded integrally. In this case, the claw 26A is also preferably formed of resin. With this configuration, it is easy to produce an integrally molded product 33 of the frame 26 and the claw 26A during resin molding. That is, it is not necessary to provide a separate step for connecting the claw 26A to the frame 26. Therefore, the productivity of the frame 26 can be further improved. Further, the dimensional accuracy of the frame 26 itself and the positional accuracy of the claw 26A with respect to the frame 26 can be increased.
  • the claw 26A preferably includes a connecting portion 26B and a convex portion 26C.
  • a first end of the connecting portion 26 ⁇ / b> B is connected to the frame 26.
  • a convex portion 26C is formed at the second end of the connecting portion 26B.
  • the convex portion 26C protrudes toward the yoke 21 from the connecting portion 26B.
  • frame 26 couple
  • the claw 26A is preferably provided with an inclined portion 26D at a location where the convex portion 26C and the connecting portion 26B are connected.
  • the inclined portion 26D is provided at the corner of the side wall portion 21C in the step portion 21A with the convex portion 26C fitted to the step portion 21A.
  • the yoke 21 is held on the frame 26 by the elastic force of the connecting portion 26B. In this case, since the yoke 21 is also pressed against the back side of the frame 26, generation of a gap between the yoke 21 and the frame 26 can be suppressed.
  • the stepped portion 21A is in pressure contact with the tip of the convex portion 26C with the convex portion 26C fitted to the stepped portion 21A.
  • the frame 26 is preferably provided with a plurality of claws 26A.
  • the plurality of claws 26A are arranged at intervals.
  • the claw 26A is preferably provided at three or more locations on the frame 26. As shown in FIG. 3A, when the shape of the frame 26 and the magnetic circuit 24 when viewed from the front side is a circle, the claw 26A is preferably provided at three locations. Note that four or more claws 26A may be provided. In addition, it is preferable to arrange
  • the magnetic circuit 24 shown in FIGS. 1 and 2 can be mounted on the frame 26 with high accuracy. Accordingly, it is possible to reduce the variation in the distance between the magnetic unit 22 and the voice coil 28 shown in FIGS. Furthermore, the amount of resin used for the frame 26 can be reduced. Therefore, the loudspeaker 32 shown in FIGS. 1 and 2 can be lightened. Further, the price of the loudspeaker 32 can be reduced.
  • the shape of the frame 26 and the magnetic circuit 24 shown in FIGS. 1 and 2 viewed from the front side may be square, rectangular, track-shaped, or elliptical.
  • the claw 26A is preferably provided at four locations on the frame 26. Note that five or more claws 26A may be provided.
  • the shape of the frame 26 viewed from the front side is a square, a rectangle, or a track type
  • the magnetic circuit 24 can be mounted on the frame 26 with high accuracy. Accordingly, it is possible to reduce the variation in the distance between the magnetic unit 22 and the voice coil 28 shown in FIGS. Furthermore, the amount of resin used for the frame 26 can be reduced. Therefore, the loudspeaker 32 shown in FIGS. 1 and 2 can be lightened. Further, the price of the loudspeaker 32 can be reduced.
  • the frame 26 preferably includes a positioning guide 26E as shown in FIG. 3C.
  • the guide 26E regulates the mounting position of the yoke 21 on the frame 26.
  • the guide 26E is preferably molded integrally with the frame 26 by injection molding. With this configuration, the accuracy of mounting the magnetic circuit 24 shown in FIGS. 1 and 2 on the frame 26 is excellent. Further, the productivity of the work of mounting the magnetic circuit 24 to the frame 26 is improved.
  • the material of the frame 26 and the claw 26A is preferably highly flexible. With this configuration, when the claw 26A is fitted into the step portion 21A, the claw 26A can be easily elastically deformed. Therefore, since the claw 26A can be easily fitted into the stepped portion 21A, the productivity of the work of mounting the magnetic circuit 24 shown in FIGS. 1 and 2 on the frame 26 is excellent.
  • the claw 26A is pressed against the yoke 21 in a state where the claw 26A is fitted to the stepped portion 21A. That is, the frame 26 holds the yoke 21 by the elastic force of the claw 26A. Therefore, the magnetic circuit 24 shown in FIGS. 1 and 2 can be prevented from dropping from the frame 26.
  • the claw 26A and the frame 26 shown in FIGS. 1 and 2 may be formed of a resin material mixed with a reinforcing filler.
  • a reinforcing filler glass, mica or the like can be used.
  • the rigidity and heat resistance of the frame 26 can be improved.
  • the accuracy of the molding dimension of the frame 26 can be improved. Therefore, the frame 26 can stably hold the magnetic circuit 24 even if the magnetic circuit 24 vibrates or changes in temperature.
  • the frame 26 and the claw 26A can be prevented from being damaged even by a drop impact of the portable device. Therefore, the frame 26 can stably hold the magnetic circuit 24. As a result, the quality and reliability of the loudspeaker 32 are improved.
  • bamboo fiber, bamboo charcoal, or cellulose fiber may be used as the reinforcing filler.
  • the toughness of the frame 26 and the claw 26A is improved. Therefore, even if an impact due to dropping or the like is applied to the frame 26 or the claw 26A, the frame 26 or the claw 26A can be prevented from being damaged.
  • the heat resistance of the frame 26 and the claw 26A is also improved. Further, the heat resistance of the frame 26 is also improved.
  • the reinforcing filler may be used by mixing two or more selected from the group consisting of glass, mica, bamboo fiber, bamboo charcoal, and cellulosic fiber.
  • the yoke 21 preferably includes a bottom portion 21D and a side wall portion 21C.
  • the magnetic part 22 is arrange
  • the side wall portion 21C is provided by being bent from the end portion of the bottom portion 21D. With this configuration, the magnetic gap 25 can be provided between the magnetic part 22 and the side wall part 21C.
  • the inner side surface 21 ⁇ / b> H of the side wall part 21 ⁇ / b> C is preferably disposed so as to face the side surface of the plate 23 through the magnetic gap 25.
  • the magnetic gap 25 can be provided between the inner side surface 21 ⁇ / b> H and the side surface of the plate 23.
  • the step portion 21A is preferably provided on the outer surface 21J of the side wall portion 21C. In this case, the convex part 26C protrudes inward of the frame 26 as shown in FIG. 3B. With this configuration, the magnetic circuit 24 can be made small.
  • the yoke 21 and the plate 23 are made of a magnetic material.
  • the yoke 21 and the plate 23 are preferably made of a metal material such as iron.
  • the yoke 21 can be produced, for example, by squeezing a sheet-like metal material.
  • the yoke 21 can be manufactured by, for example, a metal lump by multistage forging (press forming by a multistage former).
  • the step portion 21A is preferably formed at the base of the side wall portion 21C.
  • the stepped portion 21A can be formed even in the step of processing the stepped portion 21A with the yoke 21 by any processing method. That is, it is not necessary to provide a separate step for forming the step portion 21A on the side wall portion 21C. Therefore, even if the stepped portion 21A is formed on the yoke 21, an increase in the number of steps for manufacturing the yoke 21 can be suppressed. Furthermore, since the step portion 21A is formed at the base of the side wall portion 21C, the dimensional accuracy and position accuracy of the step portion 21A are excellent.
  • FIG. 4A is a bottom view of the yoke 21.
  • the stepped portion 21A is preferably formed only at a place where the claw 26A shown in FIG. 3A is fitted. In this case, the number of the claw 26A and the stepped portion 21A is the same. As described above, it is preferable to provide a plurality of claws 26A. Therefore, the plurality of stepped portions 21A are arranged on the outer side surface 21J at intervals.
  • the step portion 21A When the step portion 21A is formed in the yoke 21, the cross-sectional area through which the magnetic flux passes in the yoke 21 decreases.
  • the step portion 21E when the step portion 21E is provided so as to go around the side wall portion 21C, the cross-sectional area through which the magnetic flux passes in the yoke 21 is greatly reduced, and the magnetic resistance is increased. Therefore, it is preferable that the step portion 21A is intermittently formed on the side wall portion 21C. With this configuration, the thickness of the side wall portion 21C can be increased in the region between the stepped portions 21A. Therefore, it can suppress as much as possible that the cross-sectional area which the magnetic flux passes in the yoke 21 reduces.
  • the lateral width 26F of the convex portion 26C shown in FIG. 3A is narrower than the lateral width 21K of the step portion 21A shown in FIG. 4A.
  • the difference between the width of the convex portion 26C and the width of the stepped portion 21A is such a dimension that the claw 26A fits into the stepped portion 21A even if the width and position of the convex portion 26C and the stepped portion 21A vary. It is preferable that With this configuration, the amount of reduction in the cross-sectional area through which the magnetic flux passes can be minimized. Therefore, a decrease in magnetic flux density in the magnetic gap 25 shown in FIGS. 1 and 2 can be suppressed.
  • the number of claws 26A and stepped portions 21A shown in FIGS. 1 and 2 is as small as possible.
  • the claw 26A is preferably formed at three locations. Therefore, it is preferable that the stepped portion 21A is also provided at three places. With this configuration, the amount of reduction in the cross-sectional area through which the magnetic flux passes in the yoke 21 can be kept to a minimum, so that a decrease in the magnetic flux density of the magnetic gap 25 can be suppressed. Further, it is possible to reduce the amount of material used to form the claw 26A. Therefore, the loudspeaker 32 can be lightened. Further, the strength at which the yoke 21 and the frame 26 are coupled can be ensured.
  • FIG. 4B is a cross-sectional view of another yoke 21F.
  • the yoke 21F includes a stepped portion 21B instead of the stepped portion 21A shown in FIG. 4A.
  • the step portion 21B has two or more steps.
  • the step portion 21B since the step portion 21B has two or more steps, the step portion 21B can be processed in two or more steps. Therefore, the processing of the yoke 21 having the step portion 21B can be performed by a press machine having a smaller output than the yoke 21 having the step portion 21A shown in FIG. 4A.
  • the height of the step in the step portion 21B can be made larger than the height of the step in the step portion 21A shown in FIG. 4A. Therefore, since the convex part 26C can be protruded largely, the dimension in which the convex part 26C fits into the step part 21B can be increased. As a result, the strength of coupling between the frame 26 and the yoke 21 shown in FIGS. 1 and 2 can be increased.
  • FIG. 4C is a bottom view of still another yoke 21G.
  • the yoke 21G includes a stepped portion 21E instead of the stepped portion 21A of the yoke 21.
  • the step portion 21E is formed so as to go around the side wall portion 21C. In this case, the step portion 21E may include one step or two or more steps.
  • the stepped portion 21E can be provided so as to go around the outer surface 21J of the side wall portion 21C.
  • the amount of material used for manufacturing the yoke 21G can be further reduced.
  • the yoke 21G can be lightened.
  • the yoke 21G can be made cheap.
  • the yoke 21G does not need to adjust the angle in the rotation direction. Therefore, the productivity of the magnetic circuit 24 shown in FIGS. 1 and 2 is improved.
  • the claw 26A shown in FIG. 3B is preferably provided so as to go around the side wall 21C and surround the outside of the side wall 21C. That is, the claw 26A can be configured to be fitted into the stepped portion 21E along the entire circumference of the side wall portion 21C. With this configuration, the strength of the frame 26 shown in FIGS. 1 and 2 for holding the magnetic circuit 24 can be improved. In this case, it is preferable to provide one or a plurality of slits on the circumference of the claw 26A. With this configuration, the claw 26A is easily elastically deformed when the claw 26A is fitted into the stepped portion 21E.
  • the frame 26 and the yoke 21 are preferably bonded with an adhesive 34 as shown in FIGS. 3B and 3C.
  • the adhesive 34 can be applied, for example, between the lower surface of the frame 26 and the tip of the side wall portion 21C.
  • the adhesive 34 may be applied between the claw 26 ⁇ / b> A and the yoke 21. In this case, it can apply
  • the adhesive 34 can be applied between the stepped portion 21A and the convex portion 26C.
  • the adhesive 34 is preferably applied between the yoke 21 and the guide 26E as shown in FIG. 3C.
  • the contact area between the frame 26 and the yoke 21 can be further increased. Therefore, the coupling strength between the frame 26 and the yoke 21 shown in FIGS. 1 and 2 can be further improved.
  • the frame 26 and the yoke 21 are bonded by the adhesive 34, even if vibration is applied to the yoke 21 or the frame 26, the frame 26 and the yoke 21 can be prevented from hitting. . Therefore, it is possible to suppress the occurrence of abnormal noise caused by the contact between the frame 26 and the yoke 21. Furthermore, the generation of abnormal noise due to resonance of the frame 26 and the yoke 21 can be suppressed. Further, the air in the loudspeaker 32 shown in FIGS. 1 and 2 can be prevented from leaking out of the loudspeaker 32 due to a temperature change or the like. Therefore, the loudspeaker 32 can also suppress the generation of abnormal sounds such as distorted sounds.
  • the quality and reliability of the loudspeaker 32 can be greatly improved. Therefore, the loudspeaker 32 can be used in automobiles that require severe environmental resistance such as vibration and temperature change, and portable devices that are required to have resistance to drop impact.
  • the tweeter 32A preferably further includes an equalizer 30.
  • the equalizer 30 covers a part of the front surface portion of the diaphragm 27. Therefore, the equalizer 30 also serves as a protector. With this configuration, it is possible to suppress external force from being applied to the diaphragm 27.
  • the loudspeaker 32 when the loudspeaker 32 is the full range speaker 32B or the woofer 32C shown in FIG. 2, the loudspeaker 32 may include the damper 29. A first end of the damper 29 is connected to the frame 26. On the other hand, the second end of the damper 29 is connected to the voice coil 28. With this configuration, the voice coil 28 can be held at the center. In this case, the loudspeaker 32 may include the dust cap 31.
  • FIG. 5 is an overview of the electronic device 44 in the present embodiment.
  • the electronic device 44 is, for example, a mini component system for audio.
  • the electronic device 44 includes a loudspeaker 32 and an amplifier 42.
  • the electronic device 44 may further include a player 43.
  • the loudspeaker 32, the amplifier 42, and the player 43 are preferably housed in the enclosure 41.
  • the amplifier 42 amplifies the electric signal supplied to the loudspeaker 32.
  • the player 43 outputs a source signal input to the amplifier 42.
  • the electronic device 44 is light and can reduce the amount of resources used, thereby contributing to the protection of the global environment. In addition, since the electronic device 44 has excellent productivity, the price can be reduced. The quality and reliability of the electronic device 44 are also excellent.
  • the electronic device 44 is not limited to a mini component system.
  • the electronic device 44 is preferably mounted on a mobile device such as a mobile phone, a smart phone, a tablet terminal, or a notebook personal computer.
  • a mobile device such as a mobile phone, a smart phone, a tablet terminal, or a notebook personal computer.
  • FIG. 6 is a conceptual diagram of mobile device 50 in the present embodiment.
  • Mobile device 50 is, for example, an automobile.
  • the mobile device 50 is not limited to this, and may be a motorcycle, a bus, a train, a ship, an aircraft, or the like.
  • the mobile device 50 includes a main body 48, a drive unit 49, and a loudspeaker 32.
  • the drive unit 49 and the loudspeaker 32 are mounted on the main body 48.
  • the main body 48 preferably includes a body and a chassis.
  • the drive unit 49 preferably includes a power generation unit 45, a power transmission unit 46, and a steering unit 47.
  • the steering unit 47 includes a handle.
  • the steering unit 47 may include a tire.
  • the power generation unit 45 is, for example, a motor or an engine.
  • the power transmission unit 46 transmits the power generated by the power generation unit 45 to the tire.
  • the loudspeaker 32 can be incorporated into a rear tray, for example.
  • the loudspeaker 32 is not limited to the rear tray, and may be installed on the front panel, door, ceiling, pillar portion, instrument panel portion, floor, or the like.
  • the loudspeaker 32 can constitute a part of car navigation or car audio.
  • the loudspeaker 32 can be lightened, the fuel efficiency of the mobile device 50 can be improved. Therefore, the mobile device 50 can contribute to protection of the global environment. Furthermore, the loudspeaker 32 has excellent reliability with respect to vibration and heat. Therefore, the loudspeaker 32 can be attached to a part where the vibration is large or a part where the temperature is high. For example, the loudspeaker 32 can be mounted near the drive unit 49. Alternatively, the loudspeaker 32 can be installed in a place where the temperature is likely to rise due to direct sunlight or the like.
  • the loudspeaker according to the present invention has an effect that the strength and reliability of coupling between the magnetic circuit and the frame are excellent, and is particularly useful as a vehicle-mounted loudspeaker to which a load such as vibration is applied.

Abstract

In the present invention, a loudspeaker includes a frame, a magnetic circuit, a diaphragm, and a voice coil. The magnetic circuit includes a magnetic gap, a yoke, and a magnetic unit. The magnetic unit generates magnetic force. The yoke includes a stepped part into which a protuberance fits, the yoke being joined to the frame by the protuberance. The outer periphery of the diaphragm is joined to the frame. The voice coil has a first end joined to the diaphragm and a second end inserted into the magnet ic gap. The magnetic circuit is joined to the frame by the protuberance being fitted into the stepped part.

Description

ラウドスピーカと、それを用いた電子機器ならびに移動体装置Loudspeaker, electronic device using the same, and mobile device
　本技術分野は、車載用や各種音響機器用等に用いられるラウドスピーカと、それを用いた電子機器ならびに移動体装置に関する。 [Technical Field] This technical field relates to a loudspeaker used for in-vehicle use or various acoustic devices, and an electronic device and a mobile device using the loudspeaker.
　以下、図面を参照しながら、従来のラウドスピーカについて説明する。図７は、従来のラウドスピーカ９の断面図である。図８は、図７に示すヨーク１の平面図である。図９は、図７に示すフレーム６の要部平面図である。図１０は、図８に示すヨーク１と図９に示すフレーム６との結合状態を示す要部平面図である。 Hereinafter, a conventional loudspeaker will be described with reference to the drawings. FIG. 7 is a cross-sectional view of a conventional loudspeaker 9. FIG. 8 is a plan view of the yoke 1 shown in FIG. FIG. 9 is a plan view of an essential part of the frame 6 shown in FIG. FIG. 10 is a plan view of an essential part showing a coupling state between the yoke 1 shown in FIG. 8 and the frame 6 shown in FIG.
　ラウドスピーカ９は、フレーム６と、磁気ギャップ５を有した磁気回路４と、振動板７と、ボイスコイル８を含んでいる。磁気回路４は、ヨーク１と、マグネット２と、プレート３を含んでいる。マグネット２は、ヨーク１とプレート３の間に挟み込まれている。 The loudspeaker 9 includes a frame 6, a magnetic circuit 4 having a magnetic gap 5, a diaphragm 7, and a voice coil 8. The magnetic circuit 4 includes a yoke 1, a magnet 2, and a plate 3. The magnet 2 is sandwiched between the yoke 1 and the plate 3.
　振動板７の外周は、フレーム６の周縁部へ結合されている。ボイスコイル８の第１端は振動板７に結合され、第２端は磁気ギャップ５に挿入されている。 The outer periphery of the diaphragm 7 is coupled to the peripheral edge of the frame 6. A first end of the voice coil 8 is coupled to the diaphragm 7, and a second end is inserted into the magnetic gap 5.
　なお、ヨーク１の一部は、フレーム６へ挿入されている。そして、ヨーク１とフレーム６とは、接着剤によって結合されている。この構成により、ヨーク１がフレーム６から脱落することを防止している。 Note that a part of the yoke 1 is inserted into the frame 6. And the yoke 1 and the flame | frame 6 are couple | bonded with the adhesive agent. With this configuration, the yoke 1 is prevented from falling off the frame 6.
　しかし、接着剤のみによる結合だけでは、ヨーク１とフレーム６との結合の信頼性が低い。そこで、ヨーク１に鍔部１Ａを設け、鍔部１Ａをフレーム６へ嵌めることにより、ヨーク１とフレーム６とを結合している。 However, the reliability of the connection between the yoke 1 and the frame 6 is low only by the connection using only the adhesive. Therefore, the yoke 1 and the frame 6 are coupled by providing the yoke 1 with a collar 1A and fitting the collar 1A to the frame 6.
　次に、ヨーク１とフレーム６との結合方法について、図面を参照しながら説明する。図９に示すように、フレーム６は、突起部６Ａを含んでいる。一方、図８に示すように、ヨーク１は、鍔部１Ａを含んでいる。さらに鍔部１Ａには、切欠き部１Ｂが設けられている。 Next, a method for connecting the yoke 1 and the frame 6 will be described with reference to the drawings. As shown in FIG. 9, the frame 6 includes a protrusion 6A. On the other hand, as shown in FIG. 8, the yoke 1 includes a flange 1A. Furthermore, the notch part 1B is provided in the collar part 1A.
　突起部６Ａは、切り欠き部１Ｂへ嵌められる。そして、この後で、ヨーク１またはフレーム６を回転させて、図１０に示すように、切欠き部１Ｂと突起部６Ａの位置を異ならせる。その結果、鍔部１Ａの切り欠き部１Ｂ以外の部分と、突起部６Ａとが重なる。そして、この構成により、ヨーク１は、フレーム６へ結合される。なお、鍔部１Ａをフレーム６へインサート成形することによって、ヨーク１とフレーム６とを結合することもできる。 The protrusion 6A is fitted into the notch 1B. Then, after that, the yoke 1 or the frame 6 is rotated so that the positions of the notch 1B and the protrusion 6A are different as shown in FIG. As a result, the portions other than the cutout portion 1B of the flange portion 1A and the projection portion 6A overlap. With this configuration, the yoke 1 is coupled to the frame 6. The yoke 1 and the frame 6 can be joined by insert-molding the flange portion 1A into the frame 6.
　なお、この出願の発明に関する先行技術文献情報としては、例えば、特許文献１、特許文献２および特許文献３が知られている。 As prior art document information relating to the invention of this application, for example, Patent Document 1, Patent Document 2, and Patent Document 3 are known.
特開２００５－２０３９７２号公報JP 2005-203972 A 特開２００６－２５４０３８号公報JP 2006-254038 A 特開２００６－１８６５１７号公報JP 2006-186517 A
　本発明のラウドスピーカは、ツメを有するフレームと、磁気回路と、振動板と、ボイスコイルを含んでいる。磁気回路は、磁気ギャップと、ヨークと、磁気部を含んでいる。磁気部は、磁力を発生している。ヨークは、ツメが嵌る段差部を含み、ツメによってフレームに結合されている。振動板の外周部は、フレームに結合されている。ボイスコイルの第１端は振動板に結合され、第２端は磁気ギャップへ挿入されている。そして、ツメを段差部へ嵌めることによって、磁気回路がフレームに結合されている。 The loudspeaker of the present invention includes a frame having claws, a magnetic circuit, a diaphragm, and a voice coil. The magnetic circuit includes a magnetic gap, a yoke, and a magnetic part. The magnetic part generates magnetic force. The yoke includes a stepped portion into which the claw is fitted, and is connected to the frame by the claw. The outer periphery of the diaphragm is coupled to the frame. The first end of the voice coil is coupled to the diaphragm, and the second end is inserted into the magnetic gap. And a magnetic circuit is couple | bonded with the flame | frame by fitting a nail | claw to a level | step-difference part.
　以上のように、本発明のラウドスピーカは、ツメを段差部へ嵌めることによって、ヨークとフレームとを結合している。すなわち、磁気回路とフレームとは、機械的に結合されている。したがって、磁気回路とフレームとの間の結合強度が向上し、スピーカの品質や信頼性を向上できる。 As described above, the loudspeaker of the present invention combines the yoke and the frame by fitting the claw into the stepped portion. That is, the magnetic circuit and the frame are mechanically coupled. Therefore, the coupling strength between the magnetic circuit and the frame is improved, and the quality and reliability of the speaker can be improved.
図１は、本発明の実施の形態におけるラウドスピーカの断面図である。FIG. 1 is a cross-sectional view of a loudspeaker according to an embodiment of the present invention. 図２は、本発明の実施の形態における他の例のラウドスピーカの断面図である。FIG. 2 is a cross-sectional view of another example loudspeaker according to the exemplary embodiment of the present invention. 図３Ａは、本発明の実施の形態におけるフレームの斜視図である。FIG. 3A is a perspective view of a frame according to the embodiment of the present invention. 図３Ｂは、本発明の実施の形態におけるラウドスピーカの要部拡大断面図である。FIG. 3B is an enlarged cross-sectional view of a main part of the loudspeaker according to the exemplary embodiment of the present invention. 図３Ｃは、本発明の実施の形態におけるラウドスピーカの要部拡大断面図である。FIG. 3C is an enlarged cross-sectional view of a main part of the loudspeaker according to the exemplary embodiment of the present invention. 図４Ａは、本発明の実施の形態におけるヨークの下面図である。FIG. 4A is a bottom view of the yoke in the embodiment of the present invention. 図４Ｂは、本発明の実施の形態における他の例のヨークの断面図である。FIG. 4B is a cross-sectional view of another example yoke in the embodiment of the present invention. 図４Ｃは、本発明の実施の形態におけるさらに他の例のヨークの下面図である。FIG. 4C is a bottom view of still another example yoke in the embodiment of the present invention. 図５は、本発明の実施の形態における電子機器の外観図である。FIG. 5 is an external view of the electronic device in the embodiment of the present invention. 図６は、本発明の実施の形態における移動体装置の概念図である。FIG. 6 is a conceptual diagram of the mobile device according to the embodiment of the present invention. 図７は、従来のラウドスピーカの断面図である。FIG. 7 is a cross-sectional view of a conventional loudspeaker. 図８は、従来のラウドスピーカのヨークの平面図である。FIG. 8 is a plan view of a yoke of a conventional loudspeaker. 図９は、従来のラウドスピーカのフレームの要部平面図である。FIG. 9 is a plan view of a main part of a frame of a conventional loudspeaker. 図１０は、図８に示すヨークと図９に示すフレームとの結合状態を示す要部平面図である。FIG. 10 is a plan view of an essential part showing a coupling state between the yoke shown in FIG. 8 and the frame shown in FIG.
　本実施の形態の説明に先立ち、図７に示した従来のラウドスピーカ９における課題を説明する。図７において、ヨーク１とフレーム６は、接着剤により結合されている。すなわち、ヨーク１とフレーム６との結合の強度は、接着剤の接着力によって、決定付けられている。また、ヨーク１とフレーム６との結合の長期信頼性は、接着剤の信頼性によって、決定付けられている。特に車載用等のような過酷な環境の下では、接着剤に大きな温度変化や、長時間の振動等の負荷が加わる。このような環境下では、接着剤が劣化する。その結果、ヨーク１がフレーム６から脱落する可能性がある。 Prior to the description of the present embodiment, problems in the conventional loudspeaker 9 shown in FIG. 7 will be described. In FIG. 7, the yoke 1 and the frame 6 are joined by an adhesive. That is, the strength of the coupling between the yoke 1 and the frame 6 is determined by the adhesive strength of the adhesive. The long-term reliability of the coupling between the yoke 1 and the frame 6 is determined by the reliability of the adhesive. In particular, under a severe environment such as in-vehicle use, a load such as a large temperature change or long-time vibration is applied to the adhesive. Under such an environment, the adhesive deteriorates. As a result, the yoke 1 may fall off the frame 6.
　一般的にヨーク１は、たとえば多段鍛造などによって形成できる。ヨーク１は、鍔部１Ａを有している。したがって、ヨーク１を製作する工程において、鍔部１Ａを形成するために加工段数が増え、加工工数が増加する。したがって、ヨーク１の加工コストが高くなる。 Generally, the yoke 1 can be formed by, for example, multistage forging. The yoke 1 has a flange 1A. Therefore, in the process of manufacturing the yoke 1, the number of processing steps is increased to form the flange portion 1A, and the number of processing steps is increased. Therefore, the processing cost of the yoke 1 increases.
　さらに、切り欠き１Ｂと突起部６Ａとの位置を合わせて、ヨーク１をフレーム６へ装着する作業が必要である。さらに、ヨーク１またはフレーム６を回転する作業も必要である。したがって、ヨーク１とフレーム６とを結合する工数が増加する。その結果、ラウドスピーカ９の組み立てる工数が増加するので、ラウドスピーカ９の価格が非常に高くなる。 Furthermore, it is necessary to work to mount the yoke 1 to the frame 6 by aligning the positions of the notch 1B and the protrusion 6A. Furthermore, the operation | work which rotates the yoke 1 or the flame | frame 6 is also required. Therefore, the man-hour for joining the yoke 1 and the frame 6 increases. As a result, since the man-hours for assembling the loudspeaker 9 increase, the price of the loudspeaker 9 becomes very high.
　あるいは、鍔部１Ａをフレーム６へインサート成形した場合、インサート成形するための金型や設備の費用が高くなる。その結果、ラウドスピーカ９の価格が高くなる。 Or, when the flange portion 1A is insert-molded into the frame 6, the cost of the mold and equipment for insert molding becomes high. As a result, the price of the loudspeaker 9 increases.
　以下、本実施の形態のラウドスピーカについて、図面を参照しながら、説明する。図１は、本実施の形態におけるラウドスピーカの断面図である。図２は、本実施の形態における他のラウドスピーカの断面図である。ラウドスピーカ３２は、図１に示すようなツィータ３２Ａであってもかまわない。また、ラウドスピーカ３２は、図２に示すようなフルレンジスピーカ３２Ｂであってもかまわない。あるいは、ラウドスピーカ３２は、ウーハ３２Ｃであってもかまわない。 Hereinafter, the loudspeaker of the present embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a loudspeaker according to the present embodiment. FIG. 2 is a cross-sectional view of another loudspeaker according to the present exemplary embodiment. The loudspeaker 32 may be a tweeter 32A as shown in FIG. The loudspeaker 32 may be a full range speaker 32B as shown in FIG. Alternatively, the loudspeaker 32 may be a woofer 32C.
　図１および、図２に示すラウドスピーカ３２は、ツメ２６Ａを有したフレーム２６と、磁気回路２４と、振動板２７と、ボイスコイル２８とを含んでいる。なお、磁気回路２４は、ヨーク２１と、磁力を生じる磁気部２２とを含んでいる。なお、磁気回路２４には、磁気部２２とヨーク２１との間に磁気ギャップ２５が形成されている。そして、ヨーク２１は、段差部２１Ａを含んでいる。 1 and 2 include a frame 26 having a claw 26A, a magnetic circuit 24, a diaphragm 27, and a voice coil 28. The magnetic circuit 24 includes a yoke 21 and a magnetic part 22 that generates a magnetic force. In the magnetic circuit 24, a magnetic gap 25 is formed between the magnetic part 22 and the yoke 21. The yoke 21 includes a step portion 21A.
　振動板２７の外周部は、フレーム２６の周縁部へ結合されている。ボイスコイル２８の第１端は、振動板２７に結合されている。一方、ボイスコイル２８の第２端は、磁気ギャップ２５へ挿入されている。フレーム２６は、ヨーク２１とフレーム２６とを結合するツメ２６Ａを含んでいる。一方、ヨーク１は、ツメ２６Ａが嵌る段差部２１Ａを含んでいる。 The outer peripheral part of the diaphragm 27 is coupled to the peripheral part of the frame 26. A first end of the voice coil 28 is coupled to the diaphragm 27. On the other hand, the second end of the voice coil 28 is inserted into the magnetic gap 25. The frame 26 includes a claw 26 </ b> A that connects the yoke 21 and the frame 26. On the other hand, the yoke 1 includes a step portion 21A into which the claw 26A is fitted.
　以上の構成により、ツメ２６Ａを段差部２１Ａへ嵌めることによって、磁気回路２４とフレーム２６とを簡単に結合できる。したがって、ラウドスピーカ３２の生産性も向上でき、ラウドスピーカ３２の価格を低減できる。また、磁気回路２４は、ツメ２６Ａが段差部２１Ａへ嵌ることによって、フレーム２６と結合されるので、ヨーク２１とフレーム２６との結合強度は向上する。さらに、フレーム２６は、ツメ２６Ａによってヨーク２１を機械的に保持しているので、ヨーク２１がフレーム２６から脱落することを抑制できる。したがって、ラウドスピーカ３２の信頼性は向上する。 With the above configuration, the magnetic circuit 24 and the frame 26 can be easily coupled by fitting the claw 26A into the stepped portion 21A. Therefore, the productivity of the loudspeaker 32 can be improved, and the price of the loudspeaker 32 can be reduced. Further, since the magnetic circuit 24 is coupled to the frame 26 by fitting the claw 26A into the stepped portion 21A, the coupling strength between the yoke 21 and the frame 26 is improved. Further, since the frame 26 mechanically holds the yoke 21 with the claws 26 </ b> A, the yoke 21 can be prevented from falling off the frame 26. Therefore, the reliability of the loudspeaker 32 is improved.
　また、ヨーク２１は、段差部２１Ａの分だけ、体積が小さくなるので、ヨーク２１の重量を軽くでききる。したがって、ラウドスピーカ３２を軽くできる。さらに、ヨーク２１を製作するときの材料の使用量も削減できる。その結果、ラウドスピーカ３２を作製するための原材料の使用量を削減できるので、ラウドスピーカ３２は、地球環境の破壊の抑制に貢献できる。 Moreover, since the volume of the yoke 21 is reduced by the stepped portion 21A, the weight of the yoke 21 can be reduced. Therefore, the loudspeaker 32 can be lightened. In addition, the amount of material used when manufacturing the yoke 21 can be reduced. As a result, the amount of raw materials used to manufacture the loudspeaker 32 can be reduced, so that the loudspeaker 32 can contribute to suppressing the destruction of the global environment.
　次に、ラウドスピーカ３２について、さらに詳しく説明する。最初に、磁気回路２４について、詳しく説明する。磁気部２２は、磁気ギャップ２５での磁束を発生させるために、マグネット２２Ａを含んでいる。そして、マグネット２２Ａの第１面が、ヨーク２１上に搭載されることによって、マグネット２２Ａとヨーク２１は磁気的に結合されている。 Next, the loudspeaker 32 will be described in more detail. First, the magnetic circuit 24 will be described in detail. The magnetic part 22 includes a magnet 22 </ b> A in order to generate a magnetic flux in the magnetic gap 25. The first surface of the magnet 22A is mounted on the yoke 21 so that the magnet 22A and the yoke 21 are magnetically coupled.
　磁気部２２は、さらにプレート２３を含むことが好ましい。この場合、マグネット２２Ａの第２面の上に、プレート２３が搭載されることによって、マグネット２２Ａとプレート２３は、磁気的に結合されている。すなわち、マグネット２２Ａは、ヨーク２１およびプレート２３により挟み込まれている。そして、磁気回路２４は、プレート２３の側面とヨーク２１との間に形成された磁気ギャップ２５を含む。なお、マグネット２２Ａにおいて、第１面は第２面の反対側に位置している。 The magnetic unit 22 preferably further includes a plate 23. In this case, by mounting the plate 23 on the second surface of the magnet 22A, the magnet 22A and the plate 23 are magnetically coupled. That is, the magnet 22 </ b> A is sandwiched between the yoke 21 and the plate 23. The magnetic circuit 24 includes a magnetic gap 25 formed between the side surface of the plate 23 and the yoke 21. In the magnet 22A, the first surface is located on the opposite side of the second surface.
　以上の構成により、マグネット２２Ａの磁力を磁気ギャップ２５へ集中させることができる。したがって、磁気ギャップ２５での磁束密度が、向上する。その結果、ラウドスピーカ３２は、音圧特性やリニアリティが向上する。 With the above configuration, the magnetic force of the magnet 22A can be concentrated on the magnetic gap 25. Therefore, the magnetic flux density in the magnetic gap 25 is improved. As a result, the loudspeaker 32 has improved sound pressure characteristics and linearity.
　なお、磁気回路２４は、マグネット２２Ａとヨーク２１のみで構成してもかまわない。この場合、磁気回路２４は、マグネット２２Ａの側面とヨーク２１との間に形成された磁気ギャップ２５を含む。この構成により、磁気回路２４を小さくできる。また、磁気回路２４を軽くできる。さらに、プレート２３が不要であるので、磁気部２２の材料コストや製造コストを低減できる。したがって、ラウドスピーカ３２は、小さく、かつ軽くできる。そして、このような構成の磁気回路２４は、特に携帯機器に搭載する小型のラウドスピーカ３２に用いることが好ましい。この構成により、携帯機器を小さく、かつ軽くできる。 Note that the magnetic circuit 24 may be composed of only the magnet 22A and the yoke 21. In this case, the magnetic circuit 24 includes a magnetic gap 25 formed between the side surface of the magnet 22 </ b> A and the yoke 21. With this configuration, the magnetic circuit 24 can be made small. Further, the magnetic circuit 24 can be lightened. Furthermore, since the plate 23 is unnecessary, the material cost and manufacturing cost of the magnetic part 22 can be reduced. Therefore, the loudspeaker 32 can be small and light. And it is preferable to use the magnetic circuit 24 of such a structure for the small loudspeaker 32 especially mounted in a portable apparatus. With this configuration, the portable device can be made small and light.
　また、ラウドスピーカ３２は、自動車などに搭載してもよい。近年の自動車業界では、地球環境の保護の促進のため、資源の削減が重要な課題である。そのために、自動車の重量を軽くすることによる燃費の向上や、自動車を製作するために使用する資源の削減が進められている。そこで、このような自動車に搭載される車載用のスピーカに関しても、軽く、かつ使用する資源の削減が必要である。加えて、車載用のラウドスピーカ３２は、大きな車室空間などへ音を出力するので、大きな音圧や、大きな耐出力が必要である。以上のような背景から、車載用を中心とするラウドスピーカ３２は、音圧や出力が大きいという基本的な顧客からの要求に加え、小さく、軽いことが重要である。ところが、これらの特性は、相反するので、両立が困難である。 Further, the loudspeaker 32 may be mounted on an automobile or the like. In the automobile industry in recent years, resource reduction is an important issue in order to promote protection of the global environment. For this reason, efforts have been made to improve fuel efficiency by reducing the weight of automobiles and to reduce resources used to manufacture automobiles. Therefore, it is necessary to reduce the resources to be used lightly and also for the in-vehicle speaker mounted in such an automobile. In addition, since the in-vehicle loudspeaker 32 outputs sound to a large cabin space or the like, a large sound pressure and a large output resistance are required. From the background as described above, it is important that the loudspeaker 32 mainly for in-vehicle use is small and light in addition to a basic customer request that sound pressure and output are large. However, since these characteristics are contradictory, it is difficult to achieve both.
　そこで、磁気回路２４は、内磁型であることが好ましい。この構成により、磁気回路２４を小さくできる。したがって、ラウドスピーカ３２を小さくできる。なお、磁気回路２４は、内磁型に限られず、外磁型、あるいは内磁型と外磁型とを組み合わせてもかまわない。 Therefore, the magnetic circuit 24 is preferably an internal magnet type. With this configuration, the magnetic circuit 24 can be made small. Therefore, the loudspeaker 32 can be made small. The magnetic circuit 24 is not limited to the inner magnet type, and may be an outer magnet type or a combination of the inner magnet type and the outer magnet type.
　さらに、マグネット２２Ａとしては、ネオジムマグネットを用いることが好ましい。ネオジムマグネットは、エネルギー積が高いので、マグネット２２Ａを軽く、かつ小さくできる。さらに、マグネット２２Ａを小さくしても、マグネット２２Ａが発生する磁束を大きくできる。以上の構成により、磁気ギャップ２５での磁束密度を大きくでき、かつ磁気回路２４を軽く、かつ小さくできる。したがって、ラウドスピーカ３２は、音圧や耐入力を高くできるので、音質が優れる。さらに、ラウドスピーカ３２は、軽く、かつ小さくできる。 Furthermore, it is preferable to use a neodymium magnet as the magnet 22A. Since the neodymium magnet has a high energy product, the magnet 22A can be made lighter and smaller. Furthermore, even if the magnet 22A is made smaller, the magnetic flux generated by the magnet 22A can be increased. With the above configuration, the magnetic flux density in the magnetic gap 25 can be increased, and the magnetic circuit 24 can be lightened and reduced. Therefore, since the loudspeaker 32 can increase sound pressure and input resistance, the sound quality is excellent. Furthermore, the loudspeaker 32 can be light and small.
　次に、フレーム２６について、詳しく説明する。図３Ａは、フレーム２６の斜視図である。図３Ｂは、ラウドスピーカ３２の要部を拡大した断面図である。図３Ｃは、ラウドスピーカ３２における他の要部を拡大した断面図である。フレーム２６は、樹脂により形成されている。樹脂は、金属などに比べて比重が小さい。したがって、フレーム２６を軽くできるので、図１、図２に示すラウドスピーカ３２を軽くできる。なお、フレーム２６は、射出成形によって形成することが好ましい。この構成により、フレーム２６は、生産性に優れる。したがって、フレーム２６のコストを低減できる。 Next, the frame 26 will be described in detail. FIG. 3A is a perspective view of the frame 26. FIG. 3B is an enlarged cross-sectional view of a main part of the loudspeaker 32. FIG. 3C is an enlarged cross-sectional view of another main part of the loudspeaker 32. The frame 26 is made of resin. Resin has a lower specific gravity than metal. Therefore, since the frame 26 can be lightened, the loudspeaker 32 shown in FIGS. 1 and 2 can be lightened. The frame 26 is preferably formed by injection molding. With this configuration, the frame 26 is excellent in productivity. Therefore, the cost of the frame 26 can be reduced.
　また、フレーム２６は樹脂成形によって形成しているので、複雑な形状を容易に作製できる。たとえば、フレーム２６の材厚を、場所によって異ならせることも可能であるので、フレーム２６において、機械的な強度を必要としない箇所の材厚は、薄くできる。したがって、さらにフレーム２６を軽くできる。 Further, since the frame 26 is formed by resin molding, a complicated shape can be easily produced. For example, since the material thickness of the frame 26 can be varied depending on the location, the material thickness of the frame 26 where the mechanical strength is not required can be reduced. Therefore, the frame 26 can be further lightened.
　すなわち、フレーム２６は、プレス加工により生産された鉄等の金属製のフレームに比べて、形状の自由度が大きい。したがって、金属製のフレームに比べて、複雑な形状のフレーム２６を安く製作できる。そこで、フレーム２６とツメ２６Ａとは、一体に成形することが好ましい。なおこの場合、ツメ２６Ａも樹脂によって形成することが好ましい。この構成により、樹脂成形の際に、フレーム２６とツメ２６Ａとの一体成形品３３を作製することは容易である。すなわち、フレーム２６へツメ２６Ａを接続する工程を別途設ける必要がない。したがって、さらにフレーム２６の生産性を向上できる。また、フレーム２６自身の寸法精度や、フレーム２６に対するツメ２６Ａの位置精度を高くできる。 That is, the frame 26 has a greater degree of freedom in shape than a frame made of metal such as iron produced by pressing. Therefore, the frame 26 having a complicated shape can be manufactured at a lower cost than a metal frame. Therefore, the frame 26 and the claw 26A are preferably molded integrally. In this case, the claw 26A is also preferably formed of resin. With this configuration, it is easy to produce an integrally molded product 33 of the frame 26 and the claw 26A during resin molding. That is, it is not necessary to provide a separate step for connecting the claw 26A to the frame 26. Therefore, the productivity of the frame 26 can be further improved. Further, the dimensional accuracy of the frame 26 itself and the positional accuracy of the claw 26A with respect to the frame 26 can be increased.
　次にツメ２６Ａについて、詳細に説明する。ツメ２６Ａは、連結部２６Ｂと、凸部２６Ｃを含むことが好ましい。連結部２６Ｂの第１端は、フレーム２６に連結されている。一方、連結部２６Ｂの第２端には、凸部２６Ｃが形成されている。なお、凸部２６Ｃは、連結部２６Ｂからヨーク２１に向かって突出している。そして、凸部２６Ｃを段差部２１Ａに嵌めることによって、ヨーク２１とフレーム２６とが結合する。 Next, the claw 26A will be described in detail. The claw 26A preferably includes a connecting portion 26B and a convex portion 26C. A first end of the connecting portion 26 </ b> B is connected to the frame 26. On the other hand, a convex portion 26C is formed at the second end of the connecting portion 26B. The convex portion 26C protrudes toward the yoke 21 from the connecting portion 26B. And the yoke 21 and the flame | frame 26 couple | bond together by fitting the convex part 26C to the level | step-difference part 21A.
　なお、ツメ２６Ａには、凸部２６Ｃと連結部２６Ｂとが接続される箇所に、傾斜部２６Ｄを設けることが好ましい。この場合、凸部２６Ｃを段差部２１Ａへ嵌めた状態で、傾斜部２６Ｄは、段差部２１Ａにおける側壁部２１Ｃの角に当設している。このような構成により、凸部２６Ｃを段差部２１Ａへ嵌めた場合、連結部２６Ｂの弾性変形によって、凸部２６Ｃはヨーク２１へ押し付けられている。以上のように、ツメ２６Ａに傾斜部２６Ｄを設けているので、ヨーク２１は、凸部２６Ｃから傾斜部２６Ｄに直交する方向へ押圧力を受ける。 The claw 26A is preferably provided with an inclined portion 26D at a location where the convex portion 26C and the connecting portion 26B are connected. In this case, the inclined portion 26D is provided at the corner of the side wall portion 21C in the step portion 21A with the convex portion 26C fitted to the step portion 21A. With such a configuration, when the convex portion 26C is fitted to the stepped portion 21A, the convex portion 26C is pressed against the yoke 21 by the elastic deformation of the connecting portion 26B. As described above, since the inclined portion 26D is provided on the claw 26A, the yoke 21 receives a pressing force from the convex portion 26C in a direction orthogonal to the inclined portion 26D.
　以上の構成により、ヨーク２１は、連結部２６Ｂの弾性力によって、フレーム２６に保持されている。なお、この場合、ヨーク２１は、フレーム２６の背面側へも押し付けられているので、ヨーク２１とフレーム２６との間の隙間の発生を抑制できる。 With the above configuration, the yoke 21 is held on the frame 26 by the elastic force of the connecting portion 26B. In this case, since the yoke 21 is also pressed against the back side of the frame 26, generation of a gap between the yoke 21 and the frame 26 can be suppressed.
　あるいは、凸部２６Ｃが連結部２６Ｂの内面から突出した寸法を、段差部２１Ａの深さよりも大きくすることによって、ツメ２６Ａに弾性力を発生させることもできる。この場合、凸部２６Ｃを段差部２１Ａへ嵌めた状態で、段差部２１Ａは、凸部２６Ｃの先端で圧接されている。このような構成により、凸部２６Ｃを段差部２１Ａへ嵌めた場合、連結部２６Ｂの弾性変形によって、凸部２６Ｃはヨーク２１へ押し付けられる。その結果、ヨーク２１は、ツメ２６Ａの弾性力によって、フレーム２６に保持される。 Alternatively, it is possible to generate an elastic force on the claw 26A by making the dimension of the protruding portion 26C protruding from the inner surface of the connecting portion 26B larger than the depth of the stepped portion 21A. In this case, the stepped portion 21A is in pressure contact with the tip of the convex portion 26C with the convex portion 26C fitted to the stepped portion 21A. With such a configuration, when the convex portion 26C is fitted to the stepped portion 21A, the convex portion 26C is pressed against the yoke 21 by elastic deformation of the connecting portion 26B. As a result, the yoke 21 is held by the frame 26 by the elastic force of the claw 26A.
　フレーム２６には、複数のツメ２６Ａを設けることが好ましい。複数のツメ２６Ａは、互いに間隔をあけて配置する。なお、ツメ２６Ａはフレーム２６の３箇所以上に設けることが好ましい。図３Ａに示すように、フレーム２６および磁気回路２４を前面側から見たときの形状が円形である場合、ツメ２６Ａは３箇所に設けることが好ましい。なお、ツメ２６Ａは、４箇所以上設けてもかまわない。なお、ツメ２６Ａは、等間隔に配置することが好ましい。この構成により、図１および図２に示す磁気回路２４をフレーム２６へ精度良く装着できる。したがって、図１および図２に示す磁気部２２とボイスコイル２８との間隔のばらつきを小さくできる。さらに、フレーム２６を構成する樹脂の使用量を削減できる。したがって、図１および図２に示すラウドスピーカ３２を軽くできる。また、ラウドスピーカ３２の価格を安くできる。 The frame 26 is preferably provided with a plurality of claws 26A. The plurality of claws 26A are arranged at intervals. The claw 26A is preferably provided at three or more locations on the frame 26. As shown in FIG. 3A, when the shape of the frame 26 and the magnetic circuit 24 when viewed from the front side is a circle, the claw 26A is preferably provided at three locations. Note that four or more claws 26A may be provided. In addition, it is preferable to arrange | position claw 26A at equal intervals. With this configuration, the magnetic circuit 24 shown in FIGS. 1 and 2 can be mounted on the frame 26 with high accuracy. Accordingly, it is possible to reduce the variation in the distance between the magnetic unit 22 and the voice coil 28 shown in FIGS. Furthermore, the amount of resin used for the frame 26 can be reduced. Therefore, the loudspeaker 32 shown in FIGS. 1 and 2 can be lightened. Further, the price of the loudspeaker 32 can be reduced.
　なお、フレーム２６や、図１および図２に示す磁気回路２４を前面側から見た形状は、正方形、長方形、トラック型、あるいは楕円形でもかまわない。フレーム２６がこれらの形状である場合、ツメ２６Ａは、フレーム２６に４箇所設けることが好ましい。なお、ツメ２６Ａは５箇所以上設けてもかまわない。 The shape of the frame 26 and the magnetic circuit 24 shown in FIGS. 1 and 2 viewed from the front side may be square, rectangular, track-shaped, or elliptical. When the frame 26 has these shapes, the claw 26A is preferably provided at four locations on the frame 26. Note that five or more claws 26A may be provided.
　フレーム２６を前面側から見た形状が正方形、長方形、トラック型である場合、ツメ２６Ａは、フレーム２６のそれぞれの辺に１箇所ずつ設けることが好ましい。この構成により、磁気回路２４をフレーム２６へ精度良く装着できる。したがって、図１および図２に示す磁気部２２とボイスコイル２８との間隔のばらつきを小さくできる。さらに、フレーム２６を構成する樹脂の使用量を削減できる。したがって、図１および図２に示すラウドスピーカ３２を軽くできる。また、ラウドスピーカ３２の価格を安くできる。 When the shape of the frame 26 viewed from the front side is a square, a rectangle, or a track type, it is preferable to provide one claw 26A on each side of the frame 26. With this configuration, the magnetic circuit 24 can be mounted on the frame 26 with high accuracy. Accordingly, it is possible to reduce the variation in the distance between the magnetic unit 22 and the voice coil 28 shown in FIGS. Furthermore, the amount of resin used for the frame 26 can be reduced. Therefore, the loudspeaker 32 shown in FIGS. 1 and 2 can be lightened. Further, the price of the loudspeaker 32 can be reduced.
　さらに、フレーム２６は、図３Ｃに示すように、位置決め用のガイド２６Ｅを含むことが好ましい。ガイド２６Ｅは、ヨーク２１のフレーム２６への装着位置を規制している。なお、ガイド２６Ｅは、射出成形によりフレーム２６と一体に成形することが好ましい。この構成により、図１、図２に示す磁気回路２４をフレーム２６へ装着する精度が優れている。また、磁気回路２４をフレーム２６へ装着する作業の生産性が向上する。 Further, the frame 26 preferably includes a positioning guide 26E as shown in FIG. 3C. The guide 26E regulates the mounting position of the yoke 21 on the frame 26. The guide 26E is preferably molded integrally with the frame 26 by injection molding. With this configuration, the accuracy of mounting the magnetic circuit 24 shown in FIGS. 1 and 2 on the frame 26 is excellent. Further, the productivity of the work of mounting the magnetic circuit 24 to the frame 26 is improved.
　フレーム２６やツメ２６Ａの材料は、柔軟性が大きいことが好ましい。この構成により、ツメ２６Ａを段差部２１Ａへ嵌める場合、ツメ２６Ａは容易に弾性変形できる。したがって、ツメ２６Ａを容易に段差部２１Ａへ嵌めることができるので、図１、図２に示す磁気回路２４をフレーム２６へ装着する作業の生産性は、優れている。 The material of the frame 26 and the claw 26A is preferably highly flexible. With this configuration, when the claw 26A is fitted into the step portion 21A, the claw 26A can be easily elastically deformed. Therefore, since the claw 26A can be easily fitted into the stepped portion 21A, the productivity of the work of mounting the magnetic circuit 24 shown in FIGS. 1 and 2 on the frame 26 is excellent.
　そして、ツメ２６Ａが段差部２１Ａへ嵌った状態で、ツメ２６Ａはヨーク２１に圧接されている。すなわち、フレーム２６は、ツメ２６Ａの弾性力によってヨーク２１を保持している。したがって、図１、図２に示す磁気回路２４がフレーム２６から脱落することを抑制できる。 And the claw 26A is pressed against the yoke 21 in a state where the claw 26A is fitted to the stepped portion 21A. That is, the frame 26 holds the yoke 21 by the elastic force of the claw 26A. Therefore, the magnetic circuit 24 shown in FIGS. 1 and 2 can be prevented from dropping from the frame 26.
　ツメ２６Ａや図１、図２に示すフレーム２６は、強化フィラーを混入した樹脂材料で形成しても良い。強化フィラーとしては、ガラスやマイカ等を用いることができる。この構成により、フレーム２６の剛性や耐熱性を向上できる。さらに、フレーム２６の成形寸法の精度を向上できる。したがって、フレーム２６は、磁気回路２４の振動や温度変化が生じても、安定的に磁気回路２４を保持することができる。また、ラウドスピーカ３２を携帯機器へ搭載した場合、携帯機器の落下衝撃などに対しても、フレーム２６やツメ２６Ａが破損することを抑制できる。したがって、フレーム２６は安定的に磁気回路２４を保持することができる。その結果、ラウドスピーカ３２の品質や信頼性が向上する。 The claw 26A and the frame 26 shown in FIGS. 1 and 2 may be formed of a resin material mixed with a reinforcing filler. As the reinforcing filler, glass, mica or the like can be used. With this configuration, the rigidity and heat resistance of the frame 26 can be improved. Furthermore, the accuracy of the molding dimension of the frame 26 can be improved. Therefore, the frame 26 can stably hold the magnetic circuit 24 even if the magnetic circuit 24 vibrates or changes in temperature. Further, when the loudspeaker 32 is mounted on a portable device, the frame 26 and the claw 26A can be prevented from being damaged even by a drop impact of the portable device. Therefore, the frame 26 can stably hold the magnetic circuit 24. As a result, the quality and reliability of the loudspeaker 32 are improved.
　あるいは、強化フィラーとしては、竹繊維や竹炭、セルロース系繊維を用いてもよい。この場合、フレーム２６やツメ２６Ａの強靭性が向上する。したがって、フレーム２６やツメ２６Ａに落下などによる衝撃が加わっても、フレーム２６やツメ２６Ａが破損することを抑制できる。さらにこの場合、フレーム２６やツメ２６Ａの耐熱性も向上する。また、フレーム２６の耐熱性も向上する。さらに、フレーム２６の内部損失を大きくできるので、ラウドスピーカ３２の不要共振が低減する。したがって、ラウドスピーカ３２の周波数特性が向上するので、再生する音質が向上する。なお、強化フィラーは、ガラス、マイカ、竹繊維、竹炭、セルロース系繊維からなる群より選ばれた２種以上を混合して使用してもかまわない。 Alternatively, bamboo fiber, bamboo charcoal, or cellulose fiber may be used as the reinforcing filler. In this case, the toughness of the frame 26 and the claw 26A is improved. Therefore, even if an impact due to dropping or the like is applied to the frame 26 or the claw 26A, the frame 26 or the claw 26A can be prevented from being damaged. In this case, the heat resistance of the frame 26 and the claw 26A is also improved. Further, the heat resistance of the frame 26 is also improved. Furthermore, since the internal loss of the frame 26 can be increased, unnecessary resonance of the loudspeaker 32 is reduced. Therefore, since the frequency characteristics of the loudspeaker 32 are improved, the sound quality to be reproduced is improved. The reinforcing filler may be used by mixing two or more selected from the group consisting of glass, mica, bamboo fiber, bamboo charcoal, and cellulosic fiber.
　次に、ヨーク２１について、詳しく説明する。図１および図２に示すように、ヨーク２１は、底部２１Ｄと、側壁部２１Ｃを含むことが好ましい。なお、磁気部２２は、底部２１Ｄの中央部に配置されている。側壁部２１Ｃは、底部２１Ｄの終端部から折れ曲がって、設けられている。この構成により、磁気部２２と側壁部２１Ｃとの間に、磁気ギャップ２５を設けることができる。 Next, the yoke 21 will be described in detail. As shown in FIGS. 1 and 2, the yoke 21 preferably includes a bottom portion 21D and a side wall portion 21C. In addition, the magnetic part 22 is arrange | positioned in the center part of bottom part 21D. The side wall portion 21C is provided by being bent from the end portion of the bottom portion 21D. With this configuration, the magnetic gap 25 can be provided between the magnetic part 22 and the side wall part 21C.
　なお、磁気部２２にプレート２３を含んでいる場合、側壁部２１Ｃの内側面２１Ｈは、磁気ギャップ２５を介して、プレート２３の側面と対向するように配置することが好ましい。この構成により、内側面２１Ｈと、プレート２３の側面との間に、磁気ギャップ２５を設けることができる。さらに、段差部２１Ａは、側壁部２１Ｃの外側面２１Ｊに設けることが好ましい。この場合、凸部２６Ｃは、図３Ｂに示すように、フレーム２６の内方側へと突出する。この構成により、磁気回路２４を小さくできる。 In addition, when the magnetic part 22 includes the plate 23, the inner side surface 21 </ b> H of the side wall part 21 </ b> C is preferably disposed so as to face the side surface of the plate 23 through the magnetic gap 25. With this configuration, the magnetic gap 25 can be provided between the inner side surface 21 </ b> H and the side surface of the plate 23. Furthermore, the step portion 21A is preferably provided on the outer surface 21J of the side wall portion 21C. In this case, the convex part 26C protrudes inward of the frame 26 as shown in FIG. 3B. With this configuration, the magnetic circuit 24 can be made small.
　ヨーク２１やプレート２３は、磁性体材料によって形成されている。ヨーク２１やプレート２３は、たとえば鉄等の金属材料により構成することが好ましい。ラウドスピーカ３２が小型である場合、ヨーク２１は、たとえば、シート状の金属材料をしぼり加工することによって作製できる。一方、ラウドスピーカ３２が大型である場合、ヨーク２１は、たとえば、金属の塊を多段鍛造（多段フォーマーによるプレス成形加工）によって製作できる。 The yoke 21 and the plate 23 are made of a magnetic material. The yoke 21 and the plate 23 are preferably made of a metal material such as iron. When the loudspeaker 32 is small, the yoke 21 can be produced, for example, by squeezing a sheet-like metal material. On the other hand, when the loudspeaker 32 is large, the yoke 21 can be manufactured by, for example, a metal lump by multistage forging (press forming by a multistage former).
　図１および図２に示すように、段差部２１Ａは、側壁部２１Ｃの根元に形成することが好ましい。この構成により、いずれの加工方法によるヨーク２１でも、段差部２１Ａを加工する工程内で、段差部２１Ａも成形できる。すなわち、別途、側壁部２１Ｃへ段差部２１Ａを形成するための工程を設ける必要がない。したがって、ヨーク２１に段差部２１Ａを形成しても、ヨーク２１を作製する工数の増加を抑制できる。さらに、段差部２１Ａは、側壁部２１Ｃの根元に形成しているので、段差部２１Ａの寸法精度や位置精度が優れる。 As shown in FIGS. 1 and 2, the step portion 21A is preferably formed at the base of the side wall portion 21C. With this configuration, the stepped portion 21A can be formed even in the step of processing the stepped portion 21A with the yoke 21 by any processing method. That is, it is not necessary to provide a separate step for forming the step portion 21A on the side wall portion 21C. Therefore, even if the stepped portion 21A is formed on the yoke 21, an increase in the number of steps for manufacturing the yoke 21 can be suppressed. Furthermore, since the step portion 21A is formed at the base of the side wall portion 21C, the dimensional accuracy and position accuracy of the step portion 21A are excellent.
　図４Ａは、ヨーク２１の下面図である。段差部２１Ａは、図３Ａに示すツメ２６Ａが嵌められる場所にのみ形成することが好ましい。この場合、ツメ２６Ａと段差部２１Ａは同数である。なお、上述したように、ツメ２６Ａは複数個設けることが好ましい。したがって、複数の段差部２１Ａは、外側面２１Ｊに互いに間隔をあけて配置される。 FIG. 4A is a bottom view of the yoke 21. The stepped portion 21A is preferably formed only at a place where the claw 26A shown in FIG. 3A is fitted. In this case, the number of the claw 26A and the stepped portion 21A is the same. As described above, it is preferable to provide a plurality of claws 26A. Therefore, the plurality of stepped portions 21A are arranged on the outer side surface 21J at intervals.
　なお、ヨーク２１に段差部２１Ａを形成した場合、ヨーク２１において磁束の通過する断面積が減少する。特に、図４Ｃに示すように、側壁部２１Ｃを一周するように段差部２１Ｅを設けた場合、ヨーク２１において磁束の通過する断面積が大幅に減少し、磁気抵抗が増加する。そのため、段差部２１Ａは、側壁部２１Ｃに断続的に形成することが好ましい。この構成により、段差部２１Ａ同士の間の領域で、側壁部２１Ｃの厚みを厚くできる。したがって、ヨーク２１における磁束の通過する断面積が減少することを極力抑制できる。 When the step portion 21A is formed in the yoke 21, the cross-sectional area through which the magnetic flux passes in the yoke 21 decreases. In particular, as shown in FIG. 4C, when the step portion 21E is provided so as to go around the side wall portion 21C, the cross-sectional area through which the magnetic flux passes in the yoke 21 is greatly reduced, and the magnetic resistance is increased. Therefore, it is preferable that the step portion 21A is intermittently formed on the side wall portion 21C. With this configuration, the thickness of the side wall portion 21C can be increased in the region between the stepped portions 21A. Therefore, it can suppress as much as possible that the cross-sectional area which the magnetic flux passes in the yoke 21 reduces.
　さらに、図３Ａに示す凸部２６Ｃの横幅２６Ｆは、図４Ａに示す段差部２１Ａの横幅２１Ｋよりも、細い。この場合、凸部２６Ｃの幅と、段差部２１Ａの幅との差は、凸部２６Ｃや段差部２１Ａの幅寸法や位置のばらつきがあっても、ツメ２６Ａが段差部２１Ａへ嵌る程度の寸法とすることが好ましい。この構成により、磁束の通過する断面積の減少量を最小限に留めることができる。したがって、図１、図２に示す磁気ギャップ２５での磁束密度の低下を抑制できる。 Furthermore, the lateral width 26F of the convex portion 26C shown in FIG. 3A is narrower than the lateral width 21K of the step portion 21A shown in FIG. 4A. In this case, the difference between the width of the convex portion 26C and the width of the stepped portion 21A is such a dimension that the claw 26A fits into the stepped portion 21A even if the width and position of the convex portion 26C and the stepped portion 21A vary. It is preferable that With this configuration, the amount of reduction in the cross-sectional area through which the magnetic flux passes can be minimized. Therefore, a decrease in magnetic flux density in the magnetic gap 25 shown in FIGS. 1 and 2 can be suppressed.
　以上の点より、図１、図２に示すツメ２６Ａや段差部２１Ａの個数は、できるだけ少ないことが好ましい。磁気回路２４が円形である場合、ツメ２６Ａは３箇所に形成することが好ましい。したがって、段差部２１Ａも３箇所であることが好ましい。この構成により、ヨーク２１において、磁束が通過する断面積の減少量を最小限度に留めることができるので、磁気ギャップ２５の磁束密度の低下を抑制できる。さらに、ツメ２６Ａを形成するために必要となる材料の使用量を低減できる。したがって、ラウドスピーカ３２を軽くできる。また、ヨーク２１とフレーム２６とが結合する強度も確保できる。 From the above points, it is preferable that the number of claws 26A and stepped portions 21A shown in FIGS. 1 and 2 is as small as possible. When the magnetic circuit 24 is circular, the claw 26A is preferably formed at three locations. Therefore, it is preferable that the stepped portion 21A is also provided at three places. With this configuration, the amount of reduction in the cross-sectional area through which the magnetic flux passes in the yoke 21 can be kept to a minimum, so that a decrease in the magnetic flux density of the magnetic gap 25 can be suppressed. Further, it is possible to reduce the amount of material used to form the claw 26A. Therefore, the loudspeaker 32 can be lightened. Further, the strength at which the yoke 21 and the frame 26 are coupled can be ensured.
　図４Ｂは、他のヨーク２１Ｆの断面図である。ヨーク２１Ｆは、図４Ａに示す段差部２１Ａに代えて、段差部２１Ｂを含んでいる。段差部２１Ｂは、二段以上の段差を有している。以上の構成により、ヨーク２１Ｆにおいて、すなわち、磁束の通過する断面積が急激に減少する箇所は、１箇所に集中しない。したがって、磁束の通過する断面積が急激に減少する箇所は、２箇所以上に分散できる。その結果、ヨーク２１Ｆの磁気抵抗の増加を抑制することができるので、図１、図２に示す磁気ギャップ２５の磁束密度の低下を抑制できる。 FIG. 4B is a cross-sectional view of another yoke 21F. The yoke 21F includes a stepped portion 21B instead of the stepped portion 21A shown in FIG. 4A. The step portion 21B has two or more steps. With the above configuration, in the yoke 21F, that is, the portion where the cross-sectional area through which the magnetic flux rapidly decreases is not concentrated in one location. Therefore, the part where the cross-sectional area through which the magnetic flux passes rapidly decreases can be dispersed in two or more places. As a result, an increase in the magnetic resistance of the yoke 21F can be suppressed, so that a decrease in the magnetic flux density of the magnetic gap 25 shown in FIGS. 1 and 2 can be suppressed.
　さらに、段差部２１Ｂが二段以上の段差を有しているので、段差部２１Ｂの加工は、２回以上に分けて加工できる。したがって、段差部２１Ｂを有したヨーク２１の加工は、図４Ａに示す段差部２１Ａを有したヨーク２１に比べて、出力が小さなプレス機で加工できる。 Furthermore, since the step portion 21B has two or more steps, the step portion 21B can be processed in two or more steps. Therefore, the processing of the yoke 21 having the step portion 21B can be performed by a press machine having a smaller output than the yoke 21 having the step portion 21A shown in FIG. 4A.
　なお、段差部２１Ｂにおける段差の高さは、図４Ａに示す段差部２１Ａにおける段差の高さに比べて、大きくできる。したがって、凸部２６Ｃを大きく突出させることができるので、凸部２６Ｃが段差部２１Ｂへはまり込む寸法を大きくできる。その結果、図１、図２に示すフレーム２６とヨーク２１とが、結合する強度を大きくできる。 In addition, the height of the step in the step portion 21B can be made larger than the height of the step in the step portion 21A shown in FIG. 4A. Therefore, since the convex part 26C can be protruded largely, the dimension in which the convex part 26C fits into the step part 21B can be increased. As a result, the strength of coupling between the frame 26 and the yoke 21 shown in FIGS. 1 and 2 can be increased.
　図４Ｃは、さらに他のヨーク２１Ｇの下面図である。ヨーク２１Ｇは、ヨーク２１の段差部２１Ａに代えて、段差部２１Ｅを含んでいる。段差部２１Ｅは、側壁部２１Ｃを一周するように形成されている。なお、この場合、段差部２１Ｅは、１段、あるいは２段以上の段差を含んでもかまわない。 FIG. 4C is a bottom view of still another yoke 21G. The yoke 21G includes a stepped portion 21E instead of the stepped portion 21A of the yoke 21. The step portion 21E is formed so as to go around the side wall portion 21C. In this case, the step portion 21E may include one step or two or more steps.
　たとえば、ヨーク２１Ｇの材厚が厚い場合、ヨーク２１Ｇの磁気抵抗の減少量は、段差部２１Ｅを形成することによって大きく影響されない。したがって、このような場合、段差部２１Ｅは、側壁部２１Ｃの外側面２１Ｊを一周するように設けることができる。この構成により、さらにヨーク２１Ｇを作製するための材料の使用量を削減できる。その結果、ヨーク２１Ｇを軽くできる。またヨーク２１Ｇを安くできる。さらに、ヨーク２１Ｇをフレーム２６へ装着する場合、ヨーク２１Ｇは、回転方向の角度を調整する必要がない。したがって、図１、図２に示す磁気回路２４の生産性は向上する。 For example, when the thickness of the yoke 21G is thick, the amount of decrease in the magnetic resistance of the yoke 21G is not greatly affected by forming the step portion 21E. Therefore, in such a case, the stepped portion 21E can be provided so as to go around the outer surface 21J of the side wall portion 21C. With this configuration, the amount of material used for manufacturing the yoke 21G can be further reduced. As a result, the yoke 21G can be lightened. Moreover, the yoke 21G can be made cheap. Further, when the yoke 21G is attached to the frame 26, the yoke 21G does not need to adjust the angle in the rotation direction. Therefore, the productivity of the magnetic circuit 24 shown in FIGS. 1 and 2 is improved.
　この場合、図３Ｂに示すツメ２６Ａは側壁部２１Ｃを一周し、側壁部２１Ｃの外側を囲むように設けることが好ましい。すなわち、ツメ２６Ａは、側壁部２１Ｃの全周で段差部２１Ｅへ嵌めこまれた構成とできる。この構成により、図１、図２に示すフレーム２６が、磁気回路２４を保持する強度を向上できる。なお、この場合、ツメ２６Ａの周上に１箇所または複数箇所のスリットを設けることが好ましい。この構成により、ツメ２６Ａを段差部２１Ｅへ嵌める際に、ツメ２６Ａは弾性変形しやすくなる。 In this case, the claw 26A shown in FIG. 3B is preferably provided so as to go around the side wall 21C and surround the outside of the side wall 21C. That is, the claw 26A can be configured to be fitted into the stepped portion 21E along the entire circumference of the side wall portion 21C. With this configuration, the strength of the frame 26 shown in FIGS. 1 and 2 for holding the magnetic circuit 24 can be improved. In this case, it is preferable to provide one or a plurality of slits on the circumference of the claw 26A. With this configuration, the claw 26A is easily elastically deformed when the claw 26A is fitted into the stepped portion 21E.
　フレーム２６とヨーク２１の間は、図３Ｂ、図３Ｃに示すように、接着剤３４によって接着することが好ましい。この構成により、図１、図２に示すヨーク２１とフレーム２６とが結合する強度を向上できる。なお、接着剤３４は、図３Ｂに示すように、たとえばフレーム２６の下面と側壁部２１Ｃの先端部との間に塗布することができる。あるいは、接着剤３４は、ツメ２６Ａとヨーク２１との間に塗布してもよい。この場合、連結部２６Ｂと側壁部２１Ｃとの間に塗布することができる。さらに、接着剤３４は、段差部２１Ａと凸部２６Ｃの間に塗布することもできる。 The frame 26 and the yoke 21 are preferably bonded with an adhesive 34 as shown in FIGS. 3B and 3C. With this configuration, the strength at which the yoke 21 and the frame 26 shown in FIGS. 1 and 2 are coupled to each other can be improved. As shown in FIG. 3B, the adhesive 34 can be applied, for example, between the lower surface of the frame 26 and the tip of the side wall portion 21C. Alternatively, the adhesive 34 may be applied between the claw 26 </ b> A and the yoke 21. In this case, it can apply | coat between the connection part 26B and the side wall part 21C. Further, the adhesive 34 can be applied between the stepped portion 21A and the convex portion 26C.
　また、接着剤３４は、図３Ｃに示すように、ヨーク２１とガイド２６Ｅとの間にも塗布することが好ましい。この構成により、フレーム２６とヨーク２１との接触面積をさらに拡大させることができる。したがって、さらに図１、図２に示すフレーム２６とヨーク２１との結合強度を向上できる。 Also, the adhesive 34 is preferably applied between the yoke 21 and the guide 26E as shown in FIG. 3C. With this configuration, the contact area between the frame 26 and the yoke 21 can be further increased. Therefore, the coupling strength between the frame 26 and the yoke 21 shown in FIGS. 1 and 2 can be further improved.
　以上のように、フレーム２６とヨーク２１との間は、接着剤３４によって接着されているので、ヨーク２１やフレーム２６へ振動などが加えられても、フレーム２６とヨーク２１が当たることを抑制できる。したがって、フレーム２６とヨーク２１との当たりに起因して発生する異常音の発生を抑制できる。さらに、フレーム２６やヨーク２１の共振による異常音の発生も抑制できる。また、温度変化などに伴って、図１、図２に示すラウドスピーカ３２内の空気が、ラウドスピーカ３２の外へ漏れることを抑制できる。したがって、ラウドスピーカ３２は歪音等の異常音の発生も抑制できる。 As described above, since the frame 26 and the yoke 21 are bonded by the adhesive 34, even if vibration is applied to the yoke 21 or the frame 26, the frame 26 and the yoke 21 can be prevented from hitting. . Therefore, it is possible to suppress the occurrence of abnormal noise caused by the contact between the frame 26 and the yoke 21. Furthermore, the generation of abnormal noise due to resonance of the frame 26 and the yoke 21 can be suppressed. Further, the air in the loudspeaker 32 shown in FIGS. 1 and 2 can be prevented from leaking out of the loudspeaker 32 due to a temperature change or the like. Therefore, the loudspeaker 32 can also suppress the generation of abnormal sounds such as distorted sounds.
　以上のような構成により、ラウドスピーカ３２の品質や信頼性を大幅に向上できる。したがって、ラウドスピーカ３２は、振動や温度変化等の厳しい環境耐性を要求される自動車や、落下衝撃に対して耐性を要求される携帯機器などに用いることができる。 With the above configuration, the quality and reliability of the loudspeaker 32 can be greatly improved. Therefore, the loudspeaker 32 can be used in automobiles that require severe environmental resistance such as vibration and temperature change, and portable devices that are required to have resistance to drop impact.
　ラウドスピーカ３２が、図１に示すツィータ３２Ａである場合、ツィータ３２Ａは、さらにイコライザ３０を含むことが好ましい。なお、イコライザ３０は、振動板２７の前面部の一部を覆っている。したがってイコライザ３０は、プロテクタの役目も兼ねている。この構成により、振動板２７へ外力が加わることを抑制できる。 When the loudspeaker 32 is the tweeter 32A shown in FIG. 1, the tweeter 32A preferably further includes an equalizer 30. The equalizer 30 covers a part of the front surface portion of the diaphragm 27. Therefore, the equalizer 30 also serves as a protector. With this configuration, it is possible to suppress external force from being applied to the diaphragm 27.
　一方、ラウドスピーカ３２が、図２に示すフルレンジスピーカ３２Ｂ、あるいはウーハ３２Ｃである場合、ラウドスピーカ３２はダンパー２９を含んでもかまわない。ダンパー２９の第１端はフレーム２６へ連結されている。一方、ダンパー２９の第２端はボイスコイル２８へ連結されている。この構成により、ボイスコイル２８を中心に保持させることができる。また、この場合、ラウドスピーカ３２はダストキャップ３１を含んでもかまわない。 On the other hand, when the loudspeaker 32 is the full range speaker 32B or the woofer 32C shown in FIG. 2, the loudspeaker 32 may include the damper 29. A first end of the damper 29 is connected to the frame 26. On the other hand, the second end of the damper 29 is connected to the voice coil 28. With this configuration, the voice coil 28 can be held at the center. In this case, the loudspeaker 32 may include the dust cap 31.
　以下、図５を参照しながら、本実施の形態の電子機器について説明する。図５は、本実施の形態における電子機器４４の概観図である。電子機器４４は、たとえばオーディオ用のミニコンポシステムである。 Hereinafter, the electronic apparatus of the present embodiment will be described with reference to FIG. FIG. 5 is an overview of the electronic device 44 in the present embodiment. The electronic device 44 is, for example, a mini component system for audio.
　電子機器４４はラウドスピーカ３２と、アンプ４２を含んでいる。電子機器４４は、さらにプレーヤ４３を含んでもかまわない。そして、ラウドスピーカ３２と、アンプ４２と、プレーヤ４３は、エンクロジャー４１内に収納されることが好ましい。 The electronic device 44 includes a loudspeaker 32 and an amplifier 42. The electronic device 44 may further include a player 43. The loudspeaker 32, the amplifier 42, and the player 43 are preferably housed in the enclosure 41.
　アンプ４２は、ラウドスピーカ３２に供給する電気信号を増幅している。プレーヤ４３は、アンプ４２に入力するソース信号を出力している。 The amplifier 42 amplifies the electric signal supplied to the loudspeaker 32. The player 43 outputs a source signal input to the amplifier 42.
　以上の構成とすることにより、電子機器４４は、軽く、かつ使用する資源の減量が可能であり、地球環境の保護に貢献できる。加えて、電子機器４４は、生産性が優れているので、価格を低減できる。また電子機器４４の品質や信頼性も優れている。 With the above configuration, the electronic device 44 is light and can reduce the amount of resources used, thereby contributing to the protection of the global environment. In addition, since the electronic device 44 has excellent productivity, the price can be reduced. The quality and reliability of the electronic device 44 are also excellent.
　なお、電子機器４４は、ミニコンポシステムに限られない。電子機器４４は、たとえば携帯電話、スマートホン、タブレット端末、あるいは、ノート型パーソナルコンピュータなどのような携帯機器に搭載することが好ましい。このような携帯機器へラウドスピーカ３２を搭載することによって、これらの携帯機器を搬送時に落下させた場合でも、落下の衝撃によって図１、図２に示す磁気回路２４がフレーム２６から脱落することを抑制できる。 The electronic device 44 is not limited to a mini component system. The electronic device 44 is preferably mounted on a mobile device such as a mobile phone, a smart phone, a tablet terminal, or a notebook personal computer. By mounting the loudspeaker 32 on such a portable device, even when these portable devices are dropped during transport, the magnetic circuit 24 shown in FIGS. Can be suppressed.
　以下、本実施の形態における移動体装置について、図６を参照しながら説明する。図６は、本実施の形態における移動体装置５０の概念図である。移動体装置５０は、たとえば自動車である。しかし、移動体装置５０は、これに限定されず、オートバイ、バス、電車、船舶、航空機等であってもかまわない。 Hereinafter, the mobile device according to the present embodiment will be described with reference to FIG. FIG. 6 is a conceptual diagram of mobile device 50 in the present embodiment. Mobile device 50 is, for example, an automobile. However, the mobile device 50 is not limited to this, and may be a motorcycle, a bus, a train, a ship, an aircraft, or the like.
　移動体装置５０は、本体部４８と、駆動部４９と、ラウドスピーカ３２とを含んでいる。駆動部４９とラウドスピーカ３２は、本体部４８に搭載されている。なお、本体部４８は、ボディやシャーシなどを含むことが好ましい。また、駆動部４９は、動力発生部４５と、動力伝達部４６、操舵部４７を含むことが好ましい。さらに、操舵部４７は、ハンドルを含む。なお、操舵部４７は、タイヤを含んでもかまわない。動力発生部４５は、たとえばモータやエンジンなどである。動力伝達部４６は、動力発生部４５で発生した動力をタイヤへ伝達している。 The mobile device 50 includes a main body 48, a drive unit 49, and a loudspeaker 32. The drive unit 49 and the loudspeaker 32 are mounted on the main body 48. The main body 48 preferably includes a body and a chassis. The drive unit 49 preferably includes a power generation unit 45, a power transmission unit 46, and a steering unit 47. Further, the steering unit 47 includes a handle. The steering unit 47 may include a tire. The power generation unit 45 is, for example, a motor or an engine. The power transmission unit 46 transmits the power generated by the power generation unit 45 to the tire.
　ラウドスピーカ３２は、たとえば、リアトレイに組み込むことができる。なお、ラウドスピーカ３２は、リアトレイに限られず、フロントパネル、ドア、天井、ピラー部、インパネ部、床等に設置してもかまわない。そして、ラウドスピーカ３２は、カーナビゲーションやカーオーディオの一部を構成できる。 The loudspeaker 32 can be incorporated into a rear tray, for example. The loudspeaker 32 is not limited to the rear tray, and may be installed on the front panel, door, ceiling, pillar portion, instrument panel portion, floor, or the like. The loudspeaker 32 can constitute a part of car navigation or car audio.
　前述のように、ラウドスピーカ３２を軽くできるので、移動体装置５０の燃費を向上できる。したがって、移動体装置５０は、地球環境の保護に貢献できる。さらに、ラウドスピーカ３２は、振動や熱に対する信頼性が優れている。したがって、ラウドスピーカ３２は、振動が大きな部位や、温度が高い部位にも装着できる。たとえば、ラウドスピーカ３２は、駆動部４９の近くに装着できる。あるいは、ラウドスピーカ３２は、直射日光などによって、温度上昇しやすいような場所へも設置できる。 As described above, since the loudspeaker 32 can be lightened, the fuel efficiency of the mobile device 50 can be improved. Therefore, the mobile device 50 can contribute to protection of the global environment. Furthermore, the loudspeaker 32 has excellent reliability with respect to vibration and heat. Therefore, the loudspeaker 32 can be attached to a part where the vibration is large or a part where the temperature is high. For example, the loudspeaker 32 can be mounted near the drive unit 49. Alternatively, the loudspeaker 32 can be installed in a place where the temperature is likely to rise due to direct sunlight or the like.
　本発明にかかるラウドスピーカは、磁気回路とフレームとの結合の強度や信頼性が優れるという効果を有し、特に振動などの負荷が加わる車載用のラウドスピーカとして有用である。 The loudspeaker according to the present invention has an effect that the strength and reliability of coupling between the magnetic circuit and the frame are excellent, and is particularly useful as a vehicle-mounted loudspeaker to which a load such as vibration is applied.
１　　ヨーク
２　　マグネット
３　　プレート
４　　磁気回路
５　　磁気ギャップ
６　　フレーム
７　　振動板
８　　ボイスコイル
９　　ラウドスピーカ
２１　　ヨーク
２１Ａ　　段差部
２１Ｂ　　段差部
２１Ｃ　　側壁部
２１Ｄ　　底部
２１Ｅ　　段差部
２１Ｆ　　ヨーク
２１Ｇ　　ヨーク
２１Ｈ　　内側面
２１Ｊ　　外側面
２１Ｋ　　横幅
２２　　磁気部
２２Ａ　　マグネット
２３　　プレート
２４　　磁気回路
２５　　磁気ギャップ
２６　　フレーム
２６Ａ　　ツメ
２６Ｂ　　連結部
２６Ｃ　　凸部
２６Ｄ　　傾斜部
２６Ｅ　　ガイド
２６Ｆ　　横幅
２７　　振動板
２８　　ボイスコイル
２９　　ダンパー
３０　　イコライザ
３１　　ダストキャップ
３２　　ラウドスピーカ
３２Ａ　　ツィータ
３２Ｂ　　フルレンジスピーカ
３２Ｃ　　ウーハ
３３　　一体成形品
３４　　接着剤
４１　　エンクロジャー
４２　　アンプ
４３　　プレーヤ
４４　　電子機器
４５　　動力発生部
４６　　動力伝達部
４７　　操舵部
４８　　本体部
４９　　駆動部
５０　　移動体装置 DESCRIPTION OF SYMBOLS 1 Yoke 2 Magnet 3 Plate 4 Magnetic circuit 5 Magnetic gap 6 Frame 7 Diaphragm 8 Voice coil 9 Loudspeaker 21 Yoke 21A Step part 21B Step part 21C Side wall part 21D Bottom part 21E Step part 21F Yoke 21G Yoke 21H Inner side surface 21J Outer side surface 21K Width 22 Magnetic part 22A Magnet 23 Plate 24 Magnetic circuit 25 Magnetic gap 26 Frame 26A Claw 26B Connection part 26C Convex part 26D Inclined part 26E Guide 26F Width 27 Diaphragm 28 Voice coil 29 Damper 30 Equalizer 31 Dust cap 32 Loudspeaker 32A Tweeter 32B Full-range speaker 32C Woofer 33 Integrally molded product 34 Adhesive 41 Enclosure 42 Amplifier 43 Player 44 Electronic device 45 Power generation unit 4 Power transmission portion 47 steering unit 48 main body portion 49 drive unit 50 the mobile unit

Claims (18)

  1. ツメを有するフレームと、
           磁気を発生する磁気部と、
           前記ツメが嵌る段差部を含み、前記ツメによって前記フレームに結合されたヨークと、を有し、磁気ギャップが設けられた磁気回路と、
    前記フレームに結合された振動板と、
    第１端と第２端を含み、前記第１端が、前記磁気ギャップに挿入され、かつ前記第２端が前記振動板に結合されたボイスコイルと、を備えた、
    ラウドスピーカ。     A frame with claws;
    A magnetic part for generating magnetism;
    A magnetic circuit including a step portion into which the claw fits, and a yoke coupled to the frame by the claw, and having a magnetic gap;
    A diaphragm coupled to the frame;
    A voice coil including a first end and a second end, wherein the first end is inserted into the magnetic gap, and the second end is coupled to the diaphragm;
    Loudspeaker.
  2. 前記磁気部は、
    第１端と第２端とを有し、前記第１端が前記ヨークに結合されたマグネットと、
    前記マグネットの前記第２端に結合されたプレートと、を有する、
    請求項１記載のラウドスピーカ。     The magnetic part is
    A magnet having a first end and a second end, wherein the first end is coupled to the yoke;
    A plate coupled to the second end of the magnet,
    The loudspeaker according to claim 1.
  3. 前記ヨークは、外側面と内側面とを有し、前記外側面に前記段差部が形成された側壁部をさらに含む、
    請求項１記載のラウドスピーカ。     The yoke further includes a side wall portion having an outer surface and an inner surface, and the step portion is formed on the outer surface.
    The loudspeaker according to claim 1.
  4. 前記側壁部の前記内側面は、前記磁気ギャップを介して前記磁気部と対向している、
    請求項３記載のラウドスピーカ。     The inner side surface of the side wall portion faces the magnetic portion through the magnetic gap.
    The loudspeaker according to claim 3.
  5. 前記段差部は、前記側壁部の前記外側面を一周するように設けられた、
    請求項３記載のラウドスピーカ。     The step portion is provided so as to go around the outer surface of the side wall portion.
    The loudspeaker according to claim 3.
  6. 前記ツメは、前記側壁部の外側を一周するように設けられた、
    請求項５記載のラウドスピーカ。     The claw is provided so as to go around the outside of the side wall part,
    The loudspeaker according to claim 5.
  7. 前記段差部は、二段以上の段差を有する、
    請求項１記載のラウドスピーカ。     The step portion has two or more steps.
    The loudspeaker according to claim 1.
  8. 前記ツメは、複数のツメのひとつであり、前記複数のツメは前記フレームに互いに間隔をあけて配置された、
    請求項１記載のラウドスピーカ。     The claw is one of a plurality of claws, and the plurality of claws are arranged on the frame at intervals.
    The loudspeaker according to claim 1.
  9. 前記複数のツメは、３つ以上のツメを含む、
    請求項８記載のラウドスピーカ。     The plurality of claws include three or more claws.
    The loudspeaker according to claim 8.
  10. 前記段差部は、複数の段差部のひとつであり、前記複数の段差部は前記ヨークに互いに間隔をあけて配置された、
    請求項８に記載のラウドスピーカ。     The stepped portion is one of a plurality of stepped portions, and the plurality of stepped portions are arranged at intervals on the yoke.
    The loudspeaker according to claim 8.
  11. 前記ツメは、樹脂により形成された、
    請求項１記載のラウドスピーカ。     The claw is made of resin.
    The loudspeaker according to claim 1.
  12. 前記フレームは樹脂により形成され、かつ前記フレームと前記ツメは一体成形品である、
    請求項１１記載のラウドスピーカ。     The frame is formed of resin, and the frame and the claw are integrally molded products.
    The loudspeaker according to claim 11.
  13. 前記ツメは前記樹脂に混入された強化フィラーをさらに含む、
    請求項１１記載のラウドスピーカ。     The claw further includes a reinforcing filler mixed in the resin,
    The loudspeaker according to claim 11.
  14. 前記強化フィラーは、ガラス、マイカ、竹繊維、竹炭、セルロース系繊維からなる群より選ばれた１種以上である、
    請求項１３記載のラウドスピーカ。     The reinforcing filler is at least one selected from the group consisting of glass, mica, bamboo fiber, bamboo charcoal, and cellulose fiber.
    The loudspeaker according to claim 13.
  15. 前記フレームは、前記ヨークの位置を規制するガイドをさらに有する、
    請求項１記載のラウドスピーカ。     The frame further includes a guide for regulating the position of the yoke.
    The loudspeaker according to claim 1.
  16. 前記ヨークと前記フレームとを結合した接着剤をさらに備えた、
    請求項１記載のラウドスピーカ。     Further comprising an adhesive that bonds the yoke and the frame;
    The loudspeaker according to claim 1.
  17. 請求項１記載のラウドスピーカと、
    前記ラウドスピーカに電気信号を供給する増幅部と、を備えた、
    電子機器。     A loudspeaker according to claim 1;
    An amplifying unit for supplying an electric signal to the loudspeaker,
    Electronics.
  18. 移動可能な本体部と、
    前記本体部に搭載された駆動部と、
    前記本体部に搭載された請求項１記載のラウドスピーカと、を備えた、
    移動体装置。     A movable body,
    A drive unit mounted on the main body,
    The loudspeaker according to claim 1 mounted on the main body,
    Mobile device.
PCT/JP2013/006251 2012-11-13 2013-10-23 Loudspeaker and electronic device and mobile device using same WO2014076885A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201390000882.0U CN204559869U (en) 2012-11-13 2013-10-23 Loud speaker, the electronic equipment using this loud speaker and mobile body device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012249006A JP2016015530A (en) 2012-11-13 2012-11-13 Speaker, electronic apparatus and mobile device using the same
JP2012-249006 2012-11-13

Publications (1)

Publication Number Publication Date
WO2014076885A1 true WO2014076885A1 (en) 2014-05-22

Family

ID=50730823

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/006251 WO2014076885A1 (en) 2012-11-13 2013-10-23 Loudspeaker and electronic device and mobile device using same

Country Status (3)

Country Link
JP (1) JP2016015530A (en)
CN (1) CN204559869U (en)
WO (1) WO2014076885A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113194390A (en) * 2021-04-23 2021-07-30 歌尔股份有限公司 Sound producing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109218956B (en) * 2018-09-10 2021-02-26 上海傅硅电子科技有限公司 Method for measuring surface temperature of loudspeaker shell and computer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61124197U (en) * 1985-01-23 1986-08-05
JP2001333498A (en) * 2000-05-22 2001-11-30 Meisei Sangyo:Kk Loudspeaker and its manufacturing method
JP2002010392A (en) * 2000-06-26 2002-01-11 Matsushita Electric Ind Co Ltd Speaker unit
JP2004343385A (en) * 2003-05-15 2004-12-02 Matsushita Electric Ind Co Ltd Speaker, speaker system, electronic equipment and apparatus employing speaker
JP2008160360A (en) * 2006-12-22 2008-07-10 Matsushita Electric Ind Co Ltd Frame for speaker and speaker using same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61124197U (en) * 1985-01-23 1986-08-05
JP2001333498A (en) * 2000-05-22 2001-11-30 Meisei Sangyo:Kk Loudspeaker and its manufacturing method
JP2002010392A (en) * 2000-06-26 2002-01-11 Matsushita Electric Ind Co Ltd Speaker unit
JP2004343385A (en) * 2003-05-15 2004-12-02 Matsushita Electric Ind Co Ltd Speaker, speaker system, electronic equipment and apparatus employing speaker
JP2008160360A (en) * 2006-12-22 2008-07-10 Matsushita Electric Ind Co Ltd Frame for speaker and speaker using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113194390A (en) * 2021-04-23 2021-07-30 歌尔股份有限公司 Sound producing device

Also Published As

Publication number Publication date
CN204559869U (en) 2015-08-12
JP2016015530A (en) 2016-01-28

Similar Documents

Publication Publication Date Title
US8818006B2 (en) Speaker system, electronic apparatus using same, and mobile body device
EP3166334B1 (en) Loudspeaker and mobile device incorporating same
KR102167474B1 (en) Hybrid actuator
KR20160134813A (en) Sound producing device
EP3193516B1 (en) Loudspeaker and mobile body device having loudspeaker mounted thereon
US9161109B2 (en) Loudspeaker, and electronic apparatus and mobile device using the loudspeaker
JPWO2008059595A1 (en) Speaker
WO2014076885A1 (en) Loudspeaker and electronic device and mobile device using same
CN108696808B (en) Loudspeaker and loudspeaker assembling method
US7634102B2 (en) Speaker and device using the same
JP5494901B1 (en) Speaker, electronic apparatus using the speaker, mobile device, and speaker manufacturing method
WO2005122635A1 (en) Electro-acoustic converter, module using same, electronic device, and apparatus
US8879758B2 (en) Loudspeaker, electronic apparatus using same, and mobile apparatus
JP2012191323A (en) Speaker device equipped with electrodynamic exciter
WO2013105184A1 (en) Sound playback device and electronic device using same
JP2020178287A (en) Speaker unit, electronic apparatus, and mobile device
JP2005277866A (en) Resin frame, speaker unit and speaker device
WO2010013330A1 (en) Speaker device and manufacturing method of speaker device
JP4196104B2 (en) Speaker
JP2005136863A (en) Plate direct drive speaker apparatus
WO2014163047A1 (en) Thinning-down of multifunction-type vibration actuator
JP2012199859A (en) Speaker system and electronic equipment and mobile device using the same
JP2012222770A (en) Loudspeaker module, electronic apparatus and mobile device using the same
JP2006074427A (en) Speaker, module using the same, electronic apparatus, and device

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201390000882.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13854783

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13854783

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP