JP3601003B2 - Magnetizing device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a magnetizing device, and more particularly, to a magnetizing device that installs a non-magnetized magnet attached to a speaker device and magnetizes the magnet.
[0002]
[Prior art]
The speaker device includes, for example, two magnets each having a disk shape and having an opening hole opened at the center in order to form an outer magnet type magnetic circuit, and disposing the magnets so that the same poles face each other. In addition, a center plate made of a magnetic material is arranged between the two magnets to form a repulsion magnetic circuit. Conventionally, this magnet has been magnetized by being loaded one by one into a magnetizing device. FIG. 6 is an external view showing a conventional magnetizing device for magnetizing a magnet as described above. FIG. 7 is a configuration diagram showing the internal structure of the speaker device 1 using the magnet 35 magnetized by the magnetizing device shown in FIG.
[0003]
As shown in FIG. 6, the conventional magnetizing device includes a magnetizing means 10 having an installation part 10a for installing and magnetizing the magnet 35 of the speaker device 1 (see FIG. 7). A power supply means for storing electricity from a power supply and supplying power required for magnetization.
Here, the magnetizing means 10 is formed in a cylindrical shape, and forms an installation part 10a in which the magnet 35 of the speaker device is installed at the center of the upper part. In the magnetizing means 10, a magnetic pole (not shown) in which a coil is wound is disposed close to the installation part 10a inside. Therefore, the magnetizing means 10 is formed so that the magnet 35 can be magnetized by installing the magnet 35 in the installation portion 10a and generating a strong magnetic field in the above-described coil.
[0004]
The power supply means 20 is electrically connected to the coil of the magnetizing means 10 to supply electric power necessary for magnetization and to flow a large voltage and a large current (about 2000 V / 5000 A), thereby causing the coil to have a strong magnetic field. Is generated, and the inside is formed by an aggregate (not shown) of large-capacity capacitors. The power supply means 20 is provided with a charge lamp 22 on the external surface for indicating a state of accumulation of electric power necessary for the magnetization accumulated in the above-described capacitor, and a switch 24 for supplying the electric power stored in the capacitor. I have.
[0005]
When magnetizing the magnet 35 of the speaker device using such a conventional magnetizing device, first, an unmagnetized magnet 35 to be attached to the speaker device is installed on the installation portion 10a of the magnetizing means 10 to supply power. It waits until the charge lamp 22 of the means 20 is turned on. When the charge lamp 22 is turned on, the switch 24 of the power supply means 20 is pressed to apply a large voltage and a large current to the magnetizing means 10 to generate a strong magnetic field in the coil, thereby magnetizing the magnet 35 installed in the installation part 10a. .
[0006]
The magnet 35 thus magnetized is made of a material such as styrofoam or PVC pipe (not shown) so that contaminants such as iron powder and iron sand which adversely affect the operation of the speaker device are not attached. To prevent contaminants from adhering. In addition, in this case, the holding positions of the magnets 35 are formed at a certain interval so that the magnets 35 are not attracted to each other by magnetic force.
[0007]
Then, the magnet 35 housed in the case as described above is conveyed to a predetermined assembling step and assembled as a speaker device. Here, as shown in FIG. 7, the speaker device 1 includes two magnets 35 after the above-described magnetization, and arranges the magnets 35 so that the same poles are opposed to each other, and a magnetic material between the two magnets. A repulsion magnetic circuit 3 is formed by disposing a center plate 36. Further, in the repulsion magnetic circuit 3, two magnets 35 are taken out of the above-described case in a predetermined assembling step, and bonded with an adhesive (thermosetting adhesive) with a center plate 36 interposed therebetween. .
[0008]
As described above, in the conventional magnetizing device, the magnets 35 of the speaker device 1 are installed one by one in the installation portion 10a and magnetized, and after the magnetizing, the magnets 35 are housed in the case and the pollutants are removed. The case is transported to a predetermined assembly process to prevent the adhesion, and the case is assembled as the repulsion magnetic circuit 3 of the speaker device 1.
[0009]
[Problems to be solved by the invention]
However, in such a conventional magnetizing device, when manufacturing a repulsive magnetic circuit including two magnets 35 whose magnetic poles repel around the center plate 36 shown in FIG. 7, the magnets as shown in FIG. In order to assemble the magnet 35 as a repulsive magnetic circuit, it is necessary to magnetize the magnet 35 one by one at the installation portion 10a of the magnetizing means 10, which takes a long time in the magnetizing process and consumes a large amount of power. There has been a problem that the flow operation in the manufacturing process cannot be performed efficiently and it is difficult to improve the manufacturing efficiency.
Further, in the conventional magnetizing device, the magnets 35 after magnetizing are housed in the case at an interval so as not to stick to each other, so that the housing efficiency (space factor) of the magnet 35 in the case deteriorates. At the same time, it is necessary to pay close attention to the case in and out of the case, and there is a problem that it takes time and effort to control the magnet 35 and the case so that contaminants such as iron sand and iron powder do not adhere.
The present invention solves such a problem, and provides a magnetizing device that can magnetize a magnet of a speaker device in a short time, suppress power consumption, improve manufacturing efficiency, and easily manage the magnet after magnetizing. The purpose is to:
[0010]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION In order to solve the above-described problems, the present invention provides a magnetizing device in which an unmagnetized magnet to be mounted on a speaker device is installed and magnetized. Magnetizing means for magnetizing the magnet by generating a strong magnetic field in the coil by providing the coil near the installation portion, and the magnetizing means accumulating the power required for magnetizing from a predetermined power supply and magnetizing the magnet. The power supply means for generating a strong magnetic field in the coil by supplying a large voltage and a large current to the means, and the first magnet and the second magnet used for the speaker device are held and installed on the installation portion of the magnetizing means. And a magnetizing jig capable of assembling a repulsive magnetic circuit of the speaker device with a center plate interposed between the first magnet and the second magnet.
[0011]
Here, the first magnet and the second magnet are disk-shaped magnets having an opening hole in the center thereof, which form an external magnetic repulsion magnetic circuit in the speaker device, and the magnetizing jig is the first magnet and the second magnet. A first jig having a shaft inserted into the opening of the two magnets and holding two at the same time; and a second jig inserted into the shaft of the first jig and interposed between the first magnet and the second magnet. It is preferable to include a tool. The second jig has a concave shape and houses the second magnet therein, and is mounted on and magnetized above the first magnet installed on the axis of the first jig, and the second jig is magnetized. A mounting portion on which a center plate can be mounted is provided on the upper portion of the speaker device, and the center plate is mounted after magnetization and the upper and lower surfaces of the second magnet are inverted to form a repulsion magnetic circuit of the speaker device. Is preferred. The power supply means is an aggregate of capacitors, stores electricity by a predetermined power supply, displays the power storage required for magnetization by lighting a charge lamp, and transfers the stored power by a predetermined switch. It is preferable that a large voltage and a large current are supplied to the magnetic means so that a strong magnetic field is generated in the coil. Further, it is preferable that the power supply means supply a large voltage and a large current to the magnetizing means at approximately 2000 V / 5000 A.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a magnetizing device according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an external view showing an embodiment of a magnetizing device according to the present invention. FIG. 2 is a sectional view showing a section taken along line AA shown in FIG. FIG. 3 is a view showing a state where the center plate 36 is placed on the second jig 34 shown in FIG. FIG. 4 is a view showing a state in which the second jig 34 shown in FIG. 3 is inverted to form the repulsion magnetic circuit 3. FIG. 5 is a configuration diagram showing an internal structure of the speaker device 1 using the magnet 35 magnetized by the magnetizing device shown in FIG. Here, in the present embodiment, all of the components other than the magnetizing jig 30 shown in FIG. 1 are the same as the components of the related art shown in FIG. 6, and the same components are denoted by the same reference numerals. .
[0013]
As shown in FIG. 1, an embodiment of the magnetizing device according to the present invention is similar to the prior art shown in FIG. 6 in that an installation section for installing and magnetizing the magnet 35 of the speaker device 1 (see FIG. 5). The magnetizing unit 10 includes a magnetizing unit 10a and a power supply unit 20 that stores electricity from a power supply in the magnetizing unit 10 and supplies power required for magnetizing. Further, the embodiment of the magnetizing device according to the present invention includes a magnetizing jig 30 capable of placing two magnets 35 on the installation portion 10a of the magnetizing means 10 unlike the prior art shown in FIG. ing.
[0014]
Here, the magnetizing means 10 is formed in a cylindrical shape and forms an installation portion 10a in which the magnet 35 of the speaker device is installed at the center of the upper part, similarly to the prior art shown in FIG. In the magnetizing means 10, a magnetic pole (not shown) in which a coil is wound is disposed close to the installation part 10a inside. Therefore, the magnetizing means 10 is formed such that the magnet 35 can be magnetized by installing the magnet 35 in the installation section 10a and generating a strong magnetic field in the coil.
[0015]
The power supply means 20 is electrically connected to the coil of the magnetizing means 10 to supply electric power necessary for magnetization and to flow a large voltage and a large current (about 2000 V / 5000 A), thereby causing the coil to have a strong magnetic field. Is generated, and the inside is formed by an aggregate (not shown) of large-capacity capacitors. The power supply means 20 is provided with a charge lamp 22 on the external surface for indicating a state of accumulation of electric power necessary for the magnetization accumulated in the above-described capacitor, and a switch 24 for supplying the electric power stored in the capacitor. I have.
[0016]
Here, the magnet 35 has a disk-like shape and an opening hole 35a at the center in order to form an external-magnet repulsion magnetic circuit 3 (see FIG. 5) in the speaker device 1. Unlike the prior art shown in FIG. 6, two such magnets 35 are simultaneously mounted on the installation portion 10a of the magnetizing means 10 by the magnetizing jig 30. The magnetizing jig 30 includes a first jig 32 having a shaft 32b that is inserted into the opening 35a of the magnet 35 and simultaneously holds two magnets, and a first jig 32 that is inserted into the shaft 32b of the first jig 32. And a second jig 34 interposed between the two magnets 35. The first jig 32 is formed integrally with a base 32a formed in a disk shape and insertable into the installation portion 10a, and a shaft 32b inserted into the opening 35a of the magnet 35. The second jig 34 has a cylindrical bottom surface, and an opening (not shown) for inserting the shaft 32b of the first jig 32 is formed in the center of the bottom surface. The second jig 34 is formed with a mounting portion 34a so that a center plate 36 (see FIG. 3) of the speaker device can be mounted by notching an inner periphery of a cylindrical upper end.
[0017]
When the magnet 35 of the speaker device is magnetized using the embodiment of the magnetizing device according to the present invention, first, the first jig 32 and the second jig 34 shown in FIG. Is mounted. At this time, as shown in FIG. 2, the magnetizing jig 30 combines a second jig 34 loaded with a new magnet 35 on the upper part of the magnet 35 inserted into the shaft 32b of the first jig 32. Is installed in the installation section 10a of the magnetizing means 10, thereby simultaneously installing the two magnets 35. Thereafter, the power supply means 20 shown in FIG. 1 is driven, and the apparatus stands by until the power required for magnetization is accumulated and the charge lamp 22 is turned on. When the charge lamp 22 is turned on, the switch 24 of the power supply means 20 is pressed to apply a large voltage and a large current to the magnetizing means 10 to generate a strong magnetic field in the coil, and the two magnets 35 installed in the installation part 10a are simultaneously attached. Magnetize.
[0018]
When the two magnets 35 are magnetized, as shown in FIG. 3, the center plate 36 is mounted on the mounting portion 34a of the second jig 34, and the upper part of the magnet 35 loaded on the second jig 34 is moved. Install so as to seal. At this time, the center plate 36 is bonded to the magnet 35 loaded in the second jig 34 with an adhesive (thermosetting adhesive). Then, the upper and lower surfaces of the second jig 34 on which the center plate 36 is placed are inverted in the direction of the arrow shown in FIG. 3 and inserted into the shaft 32 b of the first jig 32. As described above, when the second jig 34 is inverted and attached to the first jig 32, as shown in FIG. 4, the speaker device in which the two magnets 35 are arranged so that the magnetic poles are repelled about the center plate 36 as shown in FIG. Can be formed. At this time, the magnet 35 and the center plate 36 installed on the first jig 32 shown in FIG. 3 are bonded by the above-mentioned adhesive (thermosetting adhesive).
[0019]
As described above, in the present embodiment, the magnet 35 and the center plate 36 are assembled in the state of the repulsive magnetic circuit 3 by the first jig 32 and the second jig 34 after the magnetization, and are conveyed to the next speaker device assembling step. It becomes possible to do. Here, there are many cases where two sets of speaker devices are usually one set (left and right speakers, etc.), and in this case, four magnetized magnets 35 are also required. Therefore, according to the conventional technique shown in FIG. 6, for example, in a case where 100 sets of two sets of speaker devices are manufactured in a magnetizing device that consumes about 2800 W at a time, 2800 × 4 × 100 Table = 1120 KW of power is consumed. On the other hand, in the present embodiment, two magnets can be magnetized in one magnetizing step, so that 100 units can be manufactured with a power of 560 KW which is half that of the related art.
[0020]
Further, as shown in FIG. 5, the repulsion magnetic circuit 3 thus formed is inserted into a frame holder 2a formed on the frame 2 of the speaker device 1 using a predetermined jig, and then the above-described adhesive is applied. Perform an aging step to cure. Thereafter, an aging step of inserting the voice coil 4 around the repulsion magnetic circuit 3 with a new jig, bonding the damper 5 and the diaphragm 6 to the voice coil 4 with the above-described adhesive, and curing the adhesive again. Execute. When the aging process is completed, the speaker device 1 is formed by attaching the center cap 7 to the center of the diaphragm 6. As described above, in the assembling process of the speaker device 1, the repulsive magnetic circuit 3 assembled in the magnetizing process in advance can be used. There is no need to assemble the circuit.
[0021]
【The invention's effect】
As described above, according to the magnetizing apparatus of the present invention, it is possible to form a repulsive magnetic circuit in which the two magnets are simultaneously magnetized in the magnetizing step by the magnetizing jig and the magnetic poles are arranged to repel around the center plate. Therefore, the power consumption can be reduced, and the assembly process of the repulsion magnetic circuit is performed in the assembly process of the speaker device, so that the work can be performed.
Further, according to the magnetizing apparatus of the present invention, since the assembly of the repulsion magnetic circuit is performed in the magnetization step as described above, the jig for the assembly step of the repulsion magnetic circuit and the magnetization step can be used, and Management of magnets after magnetizing (management by case) becomes unnecessary, and manufacturing costs can be reduced.
Furthermore, according to the magnetizing device according to the present invention, the magnetizing jigs of the first and second jigs can be used as they are in the conventional magnetizing device, so that the equipment cost is reduced and the manufacturing cost is consequently reduced. It becomes possible to reduce.
[Brief description of the drawings]
FIG. 1 is an external view showing an embodiment of a magnetizing device according to the present invention.
FIG. 2 is a sectional view showing a section taken along line AA shown in FIG. 1;
FIG. 3 is a view showing a state where a center plate is placed on a second jig shown in FIG. 2;
FIG. 4 is a diagram showing a state in which a repulsion magnetic circuit is formed by inverting the second jig shown in FIG. 3;
FIG. 5 is a configuration diagram showing an internal structure of a speaker device using a magnet magnetized by the magnetizing device shown in FIG. 1;
FIG. 6 is an external view showing a conventional magnetizing device.
FIG. 7 is a configuration diagram showing an internal structure of a speaker device using a magnet magnetized by the magnetizing device shown in FIG. 6;
[Explanation of symbols]
Reference Signs List 1 speaker device 10 magnetizing means 10a installation section 20 power supply means 22 charge lamp 24 switch 30 magnetizing jig 32 first jig 32a base 32b shaft 34 second jig 34a mounting section 35 magnet 35a opening hole 36 center plate

Claims (5)

In a magnetizing device in which an unmagnetized magnet to be mounted on a speaker device is installed and magnetized,
A magnetizing means for magnetizing the magnet by generating a strong magnetic field in the coil by providing a coil wound around a magnetic pole near the mounting portion with a mounting portion for mounting the magnet of the speaker device;
A power supply unit that generates a strong magnetic field in the coil by supplying a large voltage and a large current by supplying the magnetizing unit with power necessary for magnetizing from a predetermined power supply and supplying the magnetizing unit with the power,
The first magnet and the second magnet used in the speaker device are held and installed on the installation portion of the magnetizing means, and two magnets are simultaneously magnetized, and a center plate is interposed between the first magnet and the second magnet. A magnetizing jig capable of assembling a repulsion magnetic circuit of the speaker device. The magnetizing device according to claim 1,
The first magnet and the second magnet are disk-shaped magnets having an opening hole in the center thereof forming an external magnetic repulsion circuit in the speaker device, and the magnetizing jig includes the first magnet and the first magnet. A first jig having a shaft inserted into the opening of the second magnet and holding two at the same time, and inserted into the shaft of the first jig and interposed between the first magnet and the second magnet; A magnetizing device comprising a second jig. The magnetizing device according to claim 2,
The second jig has the concave shape, accommodates the second magnet therein, and mounts and magnetizes the first magnet mounted on the shaft of the first jig, By providing a mounting portion on which the center plate can be mounted on the second magnet, the center plate is mounted after the magnetization, and the upper and lower surfaces of the second magnet are inverted to repel the speaker device. A magnetizing device provided so as to form a magnetic circuit. The magnetizing device according to claim 1,
The power supply means is an aggregate of capacitors, stores electricity by a predetermined power supply, displays the storage of power required for magnetization by lighting a charge lamp, and displays the stored power by a predetermined switch. A magnetizing device provided so as to generate a strong magnetic field in the coil by supplying a large voltage and a large current to the magnetic means. The magnetizing device according to claim 1,
The magnetizing device, wherein the power supply means supplies a large voltage and a large current to the magnetizing means at approximately 2000 V / 5000 A.

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