WO2013190824A1 - スピーカおよびこのスピーカを用いた電子機器、移動体装置、ならびにスピーカの製造方法 - Google Patents
スピーカおよびこのスピーカを用いた電子機器、移動体装置、ならびにスピーカの製造方法 Download PDFInfo
- Publication number
- WO2013190824A1 WO2013190824A1 PCT/JP2013/003777 JP2013003777W WO2013190824A1 WO 2013190824 A1 WO2013190824 A1 WO 2013190824A1 JP 2013003777 W JP2013003777 W JP 2013003777W WO 2013190824 A1 WO2013190824 A1 WO 2013190824A1
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- WO
- WIPO (PCT)
- Prior art keywords
- frame
- speaker
- upper plate
- main body
- manufacturing
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/006—Interconnection of transducer parts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
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- 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
Definitions
- the present technical field relates to a speaker used for in-vehicle use or various audio devices, an electronic device using the speaker, a mobile device, and a method for manufacturing the speaker.
- FIG. 13 is a cross-sectional view of the speaker 111.
- the speaker 111 includes an outer magnet type magnetic circuit 104, a frame 106, a diaphragm 107, a voice coil 108, and a damper 109.
- the speaker 111 may further include a sub-cone 110.
- the speaker 111 may include a dust cap instead of the sub cone 110.
- the magnetic circuit 104 includes an upper plate 101, a magnet 102, and a lower plate 103.
- the upper plate 101 and the lower plate 103 sandwich the magnet 102.
- a magnetic gap 105 is formed between the center pole provided at the center of the lower plate 103 and the upper plate 101.
- the upper plate 101 is coupled to the frame 106.
- the material of the frame 106 is resin.
- the peripheral edge of the frame 106 and the outer periphery of the diaphragm 107 are bonded.
- One end of the voice coil 108 is coupled to the central portion of the diaphragm 107.
- the other end of the voice coil 108 is inserted into the magnetic gap 105 of the magnetic circuit 104.
- the damper 109 connects the frame 106 and the voice coil 108, and holds the voice coil 108 at the center of the frame 106.
- a sub cone 110 is bonded to the front side of the voice coil 108.
- the upper plate 101 has a protrusion 101A.
- the upper plate 101 is formed by pressing using a mold or the like. Further, the protrusion 101A is also formed by pressing using a mold or the like.
- the protrusion 101A is inserted into the through hole 106A. Then, the protrusion 101A is deformed by being stamped by a punch with a mold. In this way, the upper plate 101 and the frame 106 are coupled. Alternatively, the protrusion 101A is crushed using a rotating jig as in the high spin method. That is, the upper plate 101 and the frame 106 are joined by the deformation of the protrusion 101A.
- Patent Document 1 and Patent Document 2 are known.
- the magnetic circuit of the speaker of the present invention includes a frame, an upper plate, a magnet, a lower plate, and a center pole.
- the upper plate is coupled to the lower surface of the frame.
- a magnet is provided under the upper plate.
- a lower plate is provided under the magnet.
- a center pole is formed at the center of the lower plate, and a magnetic gap is formed between the center pole and the upper plate.
- the diaphragm is couple
- one end of the voice coil is coupled to the diaphragm, and the other end is inserted into the magnetic gap.
- a through hole is provided in the frame.
- An insertion portion provided in a part of the outer peripheral portion of the upper plate is inserted into the through hole. The penetrating part that penetrates the frame of the insertion part is bent.
- the frame and upper plate can be combined. Further, it is possible to ensure the bonding strength between the frame and the upper plate. Furthermore, the upper plate can be made thinner.
- the speaker manufacturing method of the present invention includes a step of inserting an insertion portion of an upper plate constituting a magnetic circuit together with a magnet, a lower plate, and a center pole into a through hole formed in the frame; Bending a penetrating portion of the inserted insertion portion penetrating through the frame, coupling the main body of the upper plate to the lower surface of the frame, inserting a first end of a voice coil into the magnetic gap, and Coupling the diaphragm coupled to the second end of the voice coil to the frame.
- the bonding strength between the frame and the upper plate can be secured. Furthermore, the upper plate can be made thinner.
- FIG. 1 is a cross-sectional view of a speaker according to an embodiment of the present invention.
- FIG. 2 is a perspective view of the speaker according to the embodiment of the present invention.
- FIG. 3 is a perspective view of the upper plate in the speaker according to the embodiment of the present invention.
- FIG. 4 is a perspective view of a frame in the speaker according to the embodiment of the present invention.
- FIG. 5 is an enlarged perspective view of a main part in a state in which the frame and the upper plate in the speaker according to the embodiment of the present invention are coupled.
- FIG. 6 is an enlarged perspective view of a main part of the frame in the speaker according to the embodiment of the present invention.
- FIG. 1 is a cross-sectional view of a speaker according to an embodiment of the present invention.
- FIG. 2 is a perspective view of the speaker according to the embodiment of the present invention.
- FIG. 3 is a perspective view of the upper plate in the speaker according to the embodiment of the present invention.
- FIG. 4 is a perspective
- FIG. 7 is an enlarged cross-sectional view of the main part of the speaker when the penetrating portion of the embodiment of the present invention is bent inward.
- FIG. 8 is an enlarged cross-sectional view of the main part of the speaker when the penetrating portion of the embodiment of the present invention is bent outward.
- FIG. 9 is an external view of an electronic device using the speaker according to the embodiment of the present invention.
- FIG. 10 is a conceptual diagram of a mobile device using a speaker according to an embodiment of the present invention.
- FIG. 11 is a process chart showing a method of manufacturing a speaker in the embodiment of the present invention.
- FIG. 12 is a plan view of an essential part of the manufacturing process of the upper plate in the embodiment of the present invention.
- FIG. 13 is a cross-sectional view of a conventional speaker.
- FIG. 1 is a cross-sectional view of a speaker 31 according to an embodiment of the present invention.
- FIG. 2 is a perspective view of the speaker 31.
- the speaker 31 includes a magnetic circuit 24, a resin frame 26 having a through hole 26A, a diaphragm 27, and a voice coil 28.
- the magnetic circuit 24 includes an upper plate 21, a magnet 22, a lower plate 23, and a center pole 23A.
- the upper plate 21 includes a main body portion 21C and an insertion portion 21A.
- a bottom for coupling the magnetic circuit 24 is provided at the center of the frame 26, .
- the bottom of the frame 26 is preferably flat.
- the shape when the frame 26 is viewed from above is preferably a circular shape. Therefore, the shape of the frame 26 is preferably a bowl shape or a truncated cone shape.
- the upper plate 21 is coupled to the lower surface side of the bottom portion of the frame 26. Since the frame 26 is made of resin, it is very light.
- the frame 26 is not limited to resin and may be made of metal. In this case, the strength and heat resistance of the frame 26 can be improved.
- the peripheral edge of the frame 26 and the outer periphery of the diaphragm 27 are bonded.
- the voice coil 28 has a first end and a second end. The first end is coupled to the central portion of the diaphragm 27. On the other hand, the second end is inserted into the magnetic gap 25.
- the damper 29 connects the frame 26 and the voice coil 28, and holds the voice coil 28 at the center of the frame 26.
- the sub cone 30 may be bonded to the front surface of the voice coil 28. Alternatively, instead of the sub cone 30, a dust cap may be bonded to the front surface portion of the voice coil 28.
- the upper plate 21 and the lower plate 23 sandwich the magnet 22.
- the center pole 23 ⁇ / b> A is provided at the center of the lower plate 23 and is formed to protrude from the lower plate 23.
- the center pole 23 ⁇ / b> A passes through a hole formed in the center of the upper plate 21.
- a magnetic gap 25 is formed between the side surface of the center pole 23 ⁇ / b> A and the inner surface of the upper plate 21. That is, a magnetic pole is formed at the inner peripheral end of the upper plate 21.
- the magnetic circuit 24 is coupled to the bottom provided at the center of the frame 26 in the direction in which the upper plate 21 is on the upper side.
- Recent automobiles are desired to save resources and improve fuel consumption by reducing the weight of materials from the viewpoint of protecting the global environment. Therefore, there is a strong demand for weight reduction and resource saving for components such as the speaker 31 mounted on the automobile. Therefore, the speaker 31 for in-vehicle use uses a resin as the material of the frame 26 for the purpose of weight reduction and resource saving. Further, in order to further reduce the weight and resources of the speaker 31, it is necessary to reduce the weight and resources of components other than the frame.
- the frame 106 in order to ensure the strength of the frame 106, the frame 106 must be thickened. Further, since the protrusion 101A of the speaker 111 is formed by press working, it is necessary to increase the height of the protrusion 101A in order to increase the strength of the coupling between the frame 106 and the upper plate 101. However, in order to increase the height of the protrusion 101A, it is necessary to increase the thickness of the upper plate 101. As a result, it is difficult to reduce the material thickness of the upper plate 101 and reduce the weight or resource saving of the upper plate 101. That is, it is difficult to reduce the weight of the speaker 111.
- the present invention solves the above problems. That is, the strength at which the frame 26 and the upper plate 21 are coupled can be increased. In addition, the speaker 31 can be lightened. Furthermore, resource saving of the material used for the speaker 31 can be realized.
- FIG. 3 is a perspective view of the upper plate 21.
- FIG. 4 is a perspective view of the frame 26.
- FIG. 5 is an enlarged perspective view of a main part in a state where the frame 26 and the upper plate 21 are coupled.
- FIG. 6 is an enlarged perspective view of the main part of the frame 26.
- a through hole 26 ⁇ / b> A for coupling the magnetic circuit 24 is provided at the bottom of the frame 26.
- the insertion portion 21A is formed in a part of the outer peripheral portion of the main body portion 21C.
- the insertion portion 21A is inserted into the through hole 26A from the lower surface side of the bottom portion of the frame.
- frame 26 of 21 A of insertion parts is bent. That is, the frame 26 is sandwiched between the bent through portion 21D and the main body portion 21C.
- the frame 26 and the main body 21C of the upper plate 21 are coupled. And the intensity
- bonded is securable. And the upper plate 21 can be made thin. Therefore, the speaker 31 can be lightened. Moreover, resource saving of the material used for the speaker 31 is also realizable. As a result, the speaker 31 can contribute to the protection of the global environment. Furthermore, since the frame 26 and the upper plate 21 can be coupled by bending the through portion 21D, the number of assembling steps of the speaker 31 can be reduced. Therefore, the speaker 31 is inexpensive. Moreover, since the intensity
- the upper plate 21 includes an insertion portion 21A and a main body portion 21C.
- the main body portion 21 ⁇ / b> C is coupled to the frame 26.
- 21 A of insertion parts are formed by bending a part of outer periphery of the main-body part 21C.
- the insertion portion 21A is bent at a right angle or an angle close to a right angle with respect to the main body portion 21C.
- the shape when the main body 21C is viewed from above is, for example, a square shape.
- the insertion portion 21A is provided at a corner portion of the main body portion 21C.
- the pair of insertion portions 21A so as to face each other. That is, an even number of insertion portions 21 ⁇ / b> A are arranged on the upper plate 21.
- the insertion portion 21A is not limited to four locations, and may be two locations.
- the shape of the main body portion 21C viewed from above may be a shape having a corner that is a multiple of the number of the insertion portions 21A.
- the shape of the main body 21C is preferably a square, a rectangle, or an octagon.
- an odd number of insertion portions 21A can be arranged on the upper plate 21.
- the shape when the main body 21C is viewed from above is a polygon in which the length of each side is equal.
- the insertion portion 21A is preferably arranged in the middle of each side.
- the insertion portions 21A are preferably provided on all sides.
- the shape of the upper plate 21 is a regular triangle, a regular pentagon, a regular hexagon, or the like.
- the shape of the upper plate 21 may be round or oval. In any case, that is, it is preferable to arrange the insertion portion 21A on the upper plate 21 so that the angles at which the center lines drawn from the center of the upper plate 21 to the respective insertion portions 21A intersect are all equal. As a result, the magnetic circuit 24 shown in FIG.
- the insertion portion 21A has a shape that can be easily inserted into the through hole 26A. Therefore, it is preferable to chamfer the tip of the insertion portion 21A.
- the chamfering shape may be C chamfering or R chamfering.
- the insertion portion 21A can be easily inserted into the through hole 26A. Therefore, since the man-hour for assembling the frame 26 and the upper plate 21 can be reduced, the productivity of the speaker 31 shown in FIG. 1 is also improved.
- the burring 21B is formed in the inner peripheral part of the hole formed in the center of the main body 21C of the upper plate 21.
- the burring 21B preferably protrudes in the same direction as the protruding direction of the insertion portion 21A of the upper plate 21.
- the burring 21B is a circumferential wall projecting vertically from the main body 21C.
- the magnetic gap 25 can be formed between the inner peripheral surface of the burring 21B and the outer surface of the center pole 23A. Therefore, the area where the magnetic pole part and the center pole 23A face each other can be increased. As a result, the speaker 31 shown in FIG. 1 has good power linearity and high input resistance characteristics. Moreover, since the upper plate 21 can be lightened, the speaker 31 shown in FIG. 1 is lightweight. Furthermore, resources for producing the upper plate 21 can be reduced.
- the center of the bottom of the frame 26 has a hole 26D.
- the burring 21B is fitted into the hole 26D. That is, the outer diameter of the burring 21B and the inner diameter of the hole 26D are approximately the same size.
- the upper plate 21 can be fixed to the frame 26 with high accuracy.
- the center of the upper plate 21 and the center of the frame 26 coincide with each other with high accuracy. Therefore, it is possible to suppress the occurrence of problems due to the positional deviation between the mounting of the upper plate 21 and the frame 26.
- the damper 29 and the diaphragm 27 can be prevented from riding on the guide portion of the frame 26. Therefore, the speaker 31 has high quality and high reliability.
- the insertion portion 21A is inserted into the through hole 26A of the frame 26.
- the insertion portion 21 ⁇ / b> A penetrates the frame 26.
- the through portion 21D protrudes from the upper surface of the frame 26. That is, a penetration portion 21D is formed at the distal end portion of the insertion portion 21A.
- the penetrating portion 21D is bent using a bending jig such as a mold.
- the direction in which the penetrating portion 21D is bent may be either the inside or the outside.
- the direction which bends penetration part 21D may combine an inner side and an outer side. That is, some of the insertion portions 21A may be bent outward and the rest may be bent inward.
- the pair of insertion portions 21A facing each other are both bent inward or outward. With this configuration, the upper plate 21 can be coupled to the frame 26 with high accuracy.
- FIG. 7 is an enlarged cross-sectional view of the main part of the speaker 31 when the penetrating portion 21D is bent inward.
- the through portion 21 ⁇ / b> D is bent in the inner direction of the frame 26.
- the frame 26 needs a space for arranging the bent penetration portion 21D in the outward direction from the through hole 26A.
- the frame 26 does not need a space for arranging the bent through portion 21D in the outer direction from the through hole 26A. Accordingly, the outer diameter of the frame 26 can be further reduced. As a result, the outer diameter dimension of the speaker 31 shown in FIG. 1 can be reduced.
- FIG. 8 is an enlarged cross-sectional view of the main part of the speaker 31 when the penetrating portion 21D is bent outward.
- the main body portion 21C and the bent penetration portion 21D do not overlap in the height direction. Accordingly, the connecting portion between the upper plate 21 and the frame 26 can be thinned. As a result, the height dimension of the speaker 31 shown in FIG. 1 can be reduced.
- a recess 26G may be formed in the frame 26 at a position below the bent penetrating portion 21D.
- the connecting portion between the upper plate 21 and the frame 26 can be further thinned. Since the bent through portion 21D is provided on the outer periphery of the upper plate 21, the upper plate 21 does not exist at the position on the back side of the recess 26G. Therefore, since the thickness of the frame 26 at the position on the back side of the recess 26G can be increased, damage to the frame 26 can be suppressed even if stress due to bending of the insertion portion 21A is applied to the frame 26.
- the surface to which the upper plate 21 at the bottom of the frame 26 is joined is flat.
- reinforcing ribs 26F are formed on the bottom upper surface of the frame 26 as shown in FIG. Therefore, the strength of the frame 26 can be increased and the weight can be reduced.
- the reinforcing rib 26F is preferably provided in the vicinity of the through hole 26A. With this configuration, the frame 26 becomes stronger in the vicinity of the through hole 26A. Accordingly, it is possible to suppress the deformation or breakage of the frame 26 due to the bending of the penetrating portion 21D.
- the frame 26 is preferably provided with a convex portion 26B in the vicinity of the through hole 26A.
- the convex portion 26B is disposed below the bent insertion portion 21A.
- the convex portion 26B is preferably provided around the through hole 26A.
- the penetrating portion 21D when the penetrating portion 21D is bent, it is preferable that the penetrating portion 21D and the convex portion 26B come into contact with each other.
- the upper plate 21 can be fixed to the frame 26 by the convex portion 26B being pressed by the penetrating portion 21D.
- the penetrating portion 21D preferably crushes the convex portion 26B.
- the tip of the convex portion 26B is buckled, and a buckled portion 26E is formed on the convex portion 26B.
- the buckling portion 26E of the convex portion 26B has a shape along the bent through portion 21D. Therefore, the contact area between the frame 26 and the insertion portion 21A of the upper plate 21 can be increased.
- the strength at which the frame 26 and the upper plate 21 are coupled can be further increased. As a result, it is possible to suppress the occurrence of abnormal sound that occurs when the speaker 31 is operated.
- the frame 26 is formed of resin, it can be formed in a complicated shape such as appropriately changing the thickness of the frame 26 depending on the location. Therefore, it is very easy to provide the protrusion 26B and the reinforcing rib 26F on the frame 26.
- the space 26C is provided in the frame 26 in a direction opposite to the direction in which the through portion 21D is bent with respect to the through hole 26A.
- the space 26 ⁇ / b> C may be formed by reducing the thickness of the region where the bending jig contacts the frame 26.
- the space 26 ⁇ / b> C is a recess provided in the frame 26.
- the space portion 26C may be formed by a through hole. That is, the space portion 26 ⁇ / b> C is preferably formed in a region where the bending jig hits the frame 26.
- the space portion 26C suppresses the contact between the bending jig and the frame 26 when the penetrating portion 21D is bent. Accordingly, the penetrating portion 21D can be bent at a specified angle. Furthermore, since the variation in the bending angle of the penetrating portion 21D can be reduced, the variation in the strength at which the frame 26 and the upper plate 21 are coupled can also be reduced. Moreover, the penetration part 21D can be bent safely and smoothly. Therefore, the productivity of the speaker 31 shown in FIG. 1 is also improved. Further, since the frame 26 is made of resin, it is very easy to provide the space 26C in the frame 26.
- the adhesive 32 in the vicinity of the convex portion 26B and the space portion 26C. That is, the convex portion 26 ⁇ / b> B and the bent through portion 21 ⁇ / b> D are bonded by the adhesive 32. With this configuration, since the convex portion 26B and the through portion 21D are fixed by the adhesive 32, the strength at which the frame 26 and the upper plate 21 are coupled can be further improved. As a result, the generation of abnormal sounds can be further suppressed.
- the adhesive 32 may be applied in the vicinity of the space portion 26C.
- the bottom and side surfaces of the space portion 26 ⁇ / b> C and the bent through portion 21 ⁇ / b> D are bonded by the adhesive 32.
- the space portion 26C may be filled with the adhesive 32, and the insertion portion 21A and the frame 26 may be bonded. With this configuration, the strength at which the frame 26 and the upper plate 21 are coupled can be further improved.
- the adhesive 32 since the adhesive 32 accumulates in the space portion 26 ⁇ / b> C, the adhesive 32 can be prevented from flowing into the magnetic gap 25. In this case, if the reinforcing ribs 26F are provided, it is possible to further suppress the adhesive 32 from flowing into the magnetic gap 25. Furthermore, the application of the adhesive 32 can suppress the air in the frame 26 from leaking to the outside. Or conversely, air outside the frame 26 can be prevented from entering the frame 26. Therefore, it is possible to suppress the occurrence of abnormal noise due to air leakage or intrusion.
- the speaker 31 is light and resource-saving, and has high quality and high reliability in addition to low price.
- FIG. 9 is an external view of an electronic device using the speaker 31.
- the electronic device is a mini component system 44 for audio.
- the mini component system 44 includes an enclosure 41, an amplifier 42, and a speaker 31.
- the mini component system 44 may further include a player 43.
- the enclosure 41 houses a speaker 31 and an amplifier 42. Further, the player 43 may also be stored in the enclosure 41.
- the amplifier 42 is an amplifying unit, and amplifies the electric signal and outputs it to the speaker 31. That is, the speaker 31 is electrically connected directly or indirectly to the amplifier 42.
- the player 43 outputs a source that is input to the amplifier 42.
- the enclosure 41 may be divided into a speaker enclosure that houses the speaker 31 and an amplifier enclosure that houses the amplifier 42 and the like.
- the mini component system 44 can be lightened. Moreover, since the usage-amount of the raw material for manufacturing the minicomponent system 44 can be suppressed, the minicomponent system 44 can contribute to protection of the global environment. Furthermore, since the productivity of the speaker 31 is good, the price of the mini component system 44 can be reduced. Moreover, since the quality and reliability of the speaker 31 are high, the quality and reliability of the mini component system 44 can also be increased.
- FIG. 10 is a conceptual diagram of a mobile device equipped with a speaker 31.
- the mobile device is, for example, an automobile 50.
- the mobile device is not limited to the automobile 50.
- the mobile device may be a bicycle, a motorcycle, a ship, an aircraft, a train, or the like.
- the automobile 50 includes a main body 51, a drive unit 52, an amplifier 53, and a speaker 31.
- the main body 51 houses a drive unit 52, an amplifier 53, and a speaker 31.
- the amplifier 53 supplies the amplified signal to the speaker 31. That is, the speaker 31 is electrically connected directly or indirectly to the amplifier 53.
- the drive unit 52 may include an engine, a motor, a tire, and the like. That is, the drive unit 52 generates power. Therefore, the main body 51 is moved by the power of the drive unit.
- the speaker 31 is incorporated in the rear tray of the main body 51 or the front panel.
- the speaker 31 and the amplifier 53 constitute a part of the car navigation device.
- the speaker 31 and the amplifier 53 may be used as part of the car audio.
- the place where the speaker 31 is installed is not limited to the rear tray or the front panel.
- the speaker 31 may be installed in any manner such as a door, a ceiling, a pillar part, an instrument panel part, and a floor.
- the speaker 31 has a high strength at which the upper plate 21 and the frame 26 shown in FIG. Therefore, it is possible to suppress loosening of the coupling between the upper plate 21 and the frame 26 against vibrations or the like when the automobile 50 is traveling. In addition, resonance between the upper plate 21 and the frame 26 due to vibration during travel of the automobile 50 can be suppressed. Therefore, the occurrence of abnormal noise can be suppressed.
- the car can be reduced in weight, the fuel efficiency of the car 50 is good. Moreover, since the usage-amount of the raw material for manufacturing the motor vehicle 50 can be suppressed, the motor vehicle 50 can contribute to protection of a global environment. Further, since the productivity of the speaker 31 is good, the price of the automobile 50 can be reduced. Furthermore, since the quality and reliability of the speaker 31 are high, the quality and reliability of the automobile 50 can be increased.
- FIG. 11 is a manufacturing flowchart of the speaker 31.
- the method for manufacturing the speaker 31 includes a step 61 for coupling the magnetic circuit 24 to the frame 26 and a step 62 for coupling the vibration part to the frame 26.
- the vibrating portion includes a diaphragm 27 and a voice coil 28.
- the vibration unit may further include a sub cone 30.
- the vibrating portion may include a dust cap instead of the sub cone 30.
- the method for manufacturing the speaker 31 may include a step of manufacturing the upper plate 21 and a step of manufacturing the frame 26.
- Step 61 for forming the magnetic circuit 24 includes an assembly step 61A and an assembly step 61B.
- step 61 the upper plate 21, the magnet 22, and the lower plate 23 are assembled to form the magnetic circuit 24.
- the center pole 23A protrudes from the center of the lower plate. That is, in step 61, the magnetic gap 25 is formed between the center pole 23A and the upper plate 21.
- the frame 26 and the upper plate 21 are combined.
- the magnet 22 and the lower plate 23 are coupled to the upper plate 21.
- the assembly step 61B is provided after the assembly step 61A.
- the assembly step 61A includes an insertion step 61C and a bending step 61D.
- the bending step 61D is provided after the insertion step 61C.
- the insertion portion 21A shown in FIG. 1 is inserted into the through hole 26A.
- the upper plate 21 is mounted from the lower surface side of the bottom of the frame 26.
- the penetration portion 21D of the insertion portion 21A protruding to the front side of the frame 26 is bent to a predetermined angle, and the frame 26 and the upper plate 21 are coupled.
- the insertion portion 21A is bent from the front side of the frame 26 by a bending jig.
- a die punch or the like can be used for the bending jig.
- an assembly step 61E for connecting the lower plate 23 and the magnet 22 in advance may be provided before the assembly step 61B.
- the assembly of the lower plate 23 and the magnet 22 is coupled to the assembly of the frame 26 and the upper plate 21.
- the assembly of the frame 26 and the upper plate 21 and the assembly of the lower plate 23 and the magnet 22 are fixed in a state where they are arranged at a predetermined arrangement position by a gap gauge. Therefore, the gap gauge supports the inner diameter of the upper plate 21 and the outer diameter of the center pole 23A shown in FIG.
- the upper plate 21 and the magnet 22 are preferably fixed with an adhesive.
- This configuration makes it possible to accurately arrange the upper plate 21 and the center pole 23A shown in FIG. 1 at specified positions. Therefore, since the center pole 23A can be accurately positioned, the center pole 23A can be prevented from being eccentric with respect to the center of the upper plate 21. As a result, the interval between the magnetic gaps 25 can be set to a specified dimension with high accuracy. Further, gap defects caused by contact between the voice coil 28 and the magnetic gap 25 can be greatly reduced.
- step 61 the assembly of the lower plate 23 and the magnet 22 is coupled to the assembly of the frame 26 and the upper plate 21, but the present invention is not limited to this.
- the assembly of the upper plate 21, the lower plate 23 and the magnet 22 and the frame 26 may be combined.
- the assembly of the upper plate 21, the magnet 22 and the frame 26 and the lower plate 23 may be coupled.
- step 62 for coupling the vibration part to the frame 26 includes an insertion step 62A and a coupling step 62B.
- the insertion step 62A the first end of the voice coil 28 is inserted into the magnetic gap 25.
- the damper 29 may be further coupled to the frame 26.
- the frame 26 and the damper 29 are preferably bonded using a spacer.
- the frame 26 and the diaphragm 27 are coupled.
- the second end of the voice coil 28 may be coupled to the central portion of the diaphragm 27.
- the step 62 may further include a combining step 62C after the combining step 62B.
- the coupling step 62 ⁇ / b> C the sub cone 30 is coupled to the center of the front surface of the diaphragm 27.
- a dust cap may be coupled to the diaphragm 27 instead of the sub cone 30.
- the speaker 31 is completed according to the above steps.
- the method for manufacturing the speaker 31 may include a step of manufacturing the frame 26.
- the step of manufacturing the frame 26 is provided before the assembly step 61A.
- the frame 26 is manufactured by a resin molding method such as injection molding. Since the frame 26 is formed by resin molding, the thickness of the frame 26 can be appropriately varied depending on the location. Accordingly, the frame 26 having a complicated shape can be easily manufactured.
- the method for manufacturing the speaker 31 may include a step of manufacturing the upper plate 21.
- the step of manufacturing the upper plate 21 is provided before the assembly step 61A.
- the upper plate manufacturing step preferably includes a step of punching the upper plate 21 and a step of bending the upper plate 21.
- the step of bending the upper plate 21 is provided after the step of removing the upper plate 21.
- FIG. 12 is a plan view of the main part of the upper plate 21 in the manufacturing process of the upper plate 21.
- the upper plate 21 can be formed by processing, for example, a thin metal plate using a mold.
- the upper plate 21 may be an iron plate, for example.
- the thin metal plate is cut into a predetermined width in advance.
- the punching step for forming the outer shape of the upper plate 21 the upper plate 21 is formed by sequentially trimming a continuous long coiled metal plate. Therefore, in the step of manufacturing the upper plate 21, the upper plates are manufactured in a connected state.
- a part of the upper plate 21 is bent to form the insertion portion 21A shown in FIG. Note that the magnetic pole portion may be formed in the step of bending the upper plate 21.
- the planar shape when the upper plate 21 is viewed from above is, for example, a square shape.
- the insertion portion 21 ⁇ / b> A is preferably formed at four corners of the upper plate 21. Therefore, as shown in FIG. 12, the upper plate 21 can be efficiently arranged on a continuous long coil-shaped metal plate. As a result, material loss can be reduced, so that the productivity of the upper plate 21 is high and the price can be reduced.
- the frame 26 is made of resin.
- the frame 26 can be produced by injection molding. Therefore, it is easy to integrally form the convex portion 26B, the space portion 26C, the through hole 26A, the hole 26D and the frame 26 in the step of manufacturing the frame 26. As a result, the productivity of the frame 26 is high and the price can be reduced.
- the resin-molded frame 26 does not require a punching step like a metal frame. Therefore, the loss of the raw material of the frame 26 can be reduced. As a result, the frame 26 can contribute to resource saving.
- a bending jig is pressed against the insertion portion 21A from the upper surface side of the frame 26 to pressurize the insertion portion 21A in a bending direction.
- the insertion portion 21A is bent as shown in FIG. 1, and the frame 26 and the magnetic circuit 24 are coupled.
- the upper plate 101 and the magnetic circuit 104 shown in FIG. 13 are joined by stamping and deforming the protrusion 101A with a mold.
- the upper plate 101 and the magnetic circuit 104 are coupled by crushing the protrusion 101A with a rotating jig such as a high spin method. Therefore, in the step of coupling the upper plate 101 and the magnetic circuit 104, machining waste is generated due to the deformation of the protrusion 101A.
- the processing waste is very fine and causes a problem of entering the magnetic gap 105.
- the insertion portion 21A shown in FIG. 5 is disposed below the punch of the bending jig.
- the upper plate 21 and the frame 26 are joined by bending the insertion portion 21A with a bending jig. Therefore, the processing waste generated from the insertion portion 21A is greatly reduced. As a result, it is possible to suppress the occurrence of defects such that the machining waste enters the magnetic gap.
- the frame 26 is provided with a space portion 26C shown in FIG. And in bending step 61D, the space part 26C shown in FIG. 5 is also arrange
- the assembly step 61A may further include a step of applying the adhesive 32 to the joint between the frame 26 and the upper plate 21.
- the adhesive 32 adheres between the insertion portion 21A and the frame 26 or between the insertion portion 21A and the convex portion 26B in a state where the insertion portion 21A is bent. Therefore, the step of applying the adhesive 32 is preferably provided between the assembly step 61A and the bending step 61D.
- the insertion portion 21 ⁇ / b> A can be firmly fixed to the frame 26 by the adhesive 32.
- the step of applying the adhesive 32 to the coupling portion may be provided before the assembly step 61A. Alternatively, it may be between the assembly step 61A and step 62.
- the adhesive 32 is preferably bonded between the frame, the space portion 26C, and the insertion portion 21A.
- the step of applying the adhesive 32 is preferably performed after the bending step 61D. With this configuration, the adhesive 32 can be prevented from adhering to the bending jig.
- the speaker according to the present invention can be applied to a speaker that requires light weight and resource saving.
Abstract
Description
21A 挿入部
21B バーリング
21C 本体部
21D 貫通部分
22 マグネット
23 下部プレート
23A センターポール
24 磁気回路
25 磁気ギャップ
26 フレーム
26A 貫通孔
26B 凸部
26C 空間部
26D 孔
26E 座屈部
26F 補強リブ
26G 凹部
27 振動板
28 ボイスコイル
29 ダンパー
30 サブコーン
31 スピーカ
41 エンクロージャ
42 増幅器
43 プレーヤ
44 ミニコンポシステム
50 自動車
51 本体部
52 駆動部
53 増幅器
61 ステップ
61A 組立ステップ
61B 組立ステップ
61C 挿入ステップ
61D 折り曲げステップ
61E 組立ステップ
62 ステップ
62A 挿入ステップ
62B 結合ステップ
62C 結合ステップ
62D 組立ステップ
101 上部プレート
101A 突起
102 マグネット
103 下部プレート
104 磁気回路
105 磁気ギャップ
106 フレーム
106A 貫通孔
107 振動板
108 ボイスコイル
109 ダンパー
110 サブコーン
111 スピーカ
Claims (26)
- 貫通孔が設けられたフレームと、
前記フレームの下面に結合される本体部が設けられた上部プレートと、
前記上部プレートの下に設けられたマグネットと、
前記マグネットの下に設けられた下部プレートと、
前記下部プレートの中央部に設けられ、前記上部プレートとの間に磁気ギャップを形成するセンターポールと、
前記フレームの外周部に結合される振動板と、
前記振動板へ結合された第1端と、前記磁気ギャップに挿入された第2端を有するボイスコイルと、
前記上部プレートには、前記本体部の外周部の一部に設けられ、前記貫通孔に挿入されて、前記フレームを貫通した貫通部分が折れ曲がった挿入部を有したスピーカ。 - 前記本体部の平面形状は角型である請求項1記載のスピーカ。
- 前記挿入部は、前記本体部の角部に設けられた立設された請求項2記載のスピーカ。
- 前記挿入部は、前記フレームの内側方向へ折れ曲がっている請求項1記載のスピーカ。
- 前記挿入部は、前記フレームの外側方向へ折れ曲がっている請求項1記載のスピーカ。
- 前記上部プレートは、前記本体部の中央に形成されたバーリングをさらに有し、前記磁気ギャップは、前記センターポールと前記バーリングの内周面との間に形成された請求項1記載のスピーカ。
- 前記フレームには、前記上部プレートの本体部の結合側と反対側の面に設けられ、前記貫通部分と当接する凸部をさらに有する請求項1記載のスピーカ。
- 前記フレームは樹脂製であり、前記凸部の先端には、座屈部が形成された請求項7記載のスピーカ。
- 前記凸部と前記貫通部分との間、もしくは前記凸部の周囲の一部と前記挿入部との間に接着された接着剤をさらに含む請求項8記載のスピーカ。
- 前記フレームは樹脂製であり、前記フレームには、前記貫通孔に対して前記貫通部分の折り曲げの方向とは反対側の方向に、空間部が設けられた請求項7記載のスピーカ。
- 前記空間部は凹部であり、前記凹部に供給された接着剤をさらに含み、前記接着剤は、前記凹部と前記貫通部分を接着する請求項10記載のスピーカ。
- エンクロージャと、
前記エンクロージャ内に収納された増幅器と
前記増幅器が電気的に接続された請求項1記載のスピーカとを含む電子機器。 - 本体部と
前記本体部を移動させる動力を発生する駆動部と、
前記本体部内に収納された増幅器と、
前記増幅器が電気的に接続された請求項1記載のスピーカとを含む移動体装置。 - マグネット、下部プレート、センターポールとともに磁気回路を構成する上部プレートの挿入部を、フレームに形成された貫通孔へ挿入するステップと、
前記フレームの貫通孔に挿入された挿入部の前記フレームを貫通した貫通部分を折り曲げて、前記上部プレートの本体部を前記フレームの下面へ結合するステップと、
ボイスコイルの第1端を磁気ギャップに挿入するステップと、
前記ボイスコイルの第2端に結合される振動板を前記フレームへ結合するステップを含むスピーカの製造方法。 - 前記貫通部分と、前記フレームとの間を接着剤によって接着するステップを、さらに備えた請求項14記載のスピーカの製造方法。
- 前記フレーム、前記上部プレート、前記下部プレートと前記マグネットとを結合し、前記センターポールと前記上部プレートの間に磁気ギャップを形成するステップをさらに含む請求項14記載のスピーカの製造方法。
- 前記ボイスコイルとダンパを結合するステップをさらに備え、
前記ボイスコイルの第1端を磁気ギャップに挿入するステップでは、前記ダンパとフレームを結合する請求項16記載のスピーカの製造方法。 - 前記本体部の外形を角型に形成し、かつ前記本体部の角に前記挿入部を形成するステップをさらに含む請求項14記載のスピーカの製造方法。
- 前記本体部の中央部に、バーリング加工を施すステップをさらに含む請求項18記載のスピーカの製造方法。
- 前記本体部の中央にはバーリングを有し、前記フレームの底の中央には孔が設けられ、
前記挿入部を前記貫通孔へ挿入するステップでは、前記バーリングの外周を前記孔の内周へはめ込んで、前記センターポールと前記バーリングの内周面との間に、前記磁気ギャップを形成する請求項14記載のスピーカの製造方法。 - 前記フレームを樹脂成形により製作するステップをさらに含む請求項14記載のスピーカの製造方法。
- 前記貫通部分に当接する凸部を、前記フレームを樹脂成形により製作するステップで製作する請求項21記載のスピーカの製造方法。
- 前記フレームの表面には凸部を設け、
前記上部プレートの本体部を前記フレームの下面へ結合するステップでは、前記挿入部の前記フレームを貫通した部分が前記凸部を押し潰す請求項14記載のスピーカの製造方法。 - 前記フレームへ振動部を結合するステップの前に、前記凸部と前記挿入部を接着するステップをさらに含む請求項23記載のスピーカの製造方法。
- 前記フレームの上面側の前記挿入部の周囲には空間部を設け、
前記上部プレートの本体部を前記フレームの下面へ結合するステップでは、前記貫通部分を折り曲げる冶具が、前記空間部の上方に配置されて、前記折り曲げ冶具を前記挿入部へ押し当てて、前記挿入部を折り曲げる請求項14記載のスピーカの製造方法。 - 前記上部プレートの本体部を前記フレームの下面へ結合するステップの後に、前記空間と前記貫通部分の間を接着剤によって接着するステップをさらに有した請求項25記載のスピーカの製造方法。
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JP2013556923A JP5494901B1 (ja) | 2012-06-22 | 2013-06-18 | スピーカおよびこのスピーカを用いた電子機器、移動体装置、ならびにスピーカの製造方法 |
US14/240,027 US9008350B2 (en) | 2012-06-22 | 2013-06-18 | Loudspeaker, electronic device and mobile device both including the same, and method of producing the same |
CN201380003045.8A CN103797818B (zh) | 2012-06-22 | 2013-06-18 | 扬声器及使用该扬声器的电子设备、移动体装置以及扬声器的制造方法 |
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EP3761661A1 (en) | 2019-07-01 | 2021-01-06 | Hosiden Corporation | Speaker housing |
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CN112492461B (zh) * | 2020-12-09 | 2022-03-04 | 共达电声股份有限公司 | 一种扬声器 |
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- 2013-06-18 WO PCT/JP2013/003777 patent/WO2013190824A1/ja active Application Filing
- 2013-06-18 JP JP2013556923A patent/JP5494901B1/ja active Active
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JPH03155299A (ja) * | 1989-11-14 | 1991-07-03 | Matsushita Electric Ind Co Ltd | スピーカ |
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EP3761661A1 (en) | 2019-07-01 | 2021-01-06 | Hosiden Corporation | Speaker housing |
US11265633B2 (en) | 2019-07-01 | 2022-03-01 | Hosiden Corporation | Speaker housing |
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CN103797818B (zh) | 2015-04-29 |
CN103797818A (zh) | 2014-05-14 |
JPWO2013190824A1 (ja) | 2016-02-08 |
US9008350B2 (en) | 2015-04-14 |
JP5494901B1 (ja) | 2014-05-21 |
US20140193026A1 (en) | 2014-07-10 |
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