JP3438629B2 - Speaker unit structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a speaker unit, and in particular, it is easy to assemble, and a magnetic flux of the speaker using a repulsive magnetic circuit is enhanced to effectively dissipate heat generated from a voice coil. Regarding the structure of the unit.

[0002]

2. Description of the Related Art An example of a conventional flat panel speaker unit using a repulsive magnetic circuit is shown in FIGS. The center pole 1a provided in the frame 1 shown in the drawing sequentially inserts the magnet 6, the center plate 7, and the magnet 6, and the mounting screw 9 into which the plain washer 16 is inserted is screwed into the center pole 1a.

In this way, the magnetic circuit fixed to the center pole 1a forms a repulsive magnetic circuit in which the magnets 6, 6 are arranged so that the same poles face each other, and a magnetic field is emitted outward from the outer circumference of the center plate 7. is doing. The voice coil 8 arranged in this magnetic field is fixed to the inner circumference of the diaphragm 3, and the diaphragm 3 is supported by the frame 1 via the edge 4. The voice coil 8 is connected to a terminal 11 fixed to the frame 1.

A protector 1 made of punched metal
5 is a mounting screw 9, 9 ...
Is fastened together with the frame 1. Alternatively, the protector is high-frequency welded to the resin grill and the resin grill is fixed to the baffle.

[0005]

In the above-mentioned conventional speaker unit, the magnetic circuit and the protector are mounted in separate steps, which results in a large number of manufacturing steps and a high manufacturing cost. Further, since the magnetic circuit is pressed and fixed only by the mounting screw screwed into the center pole, there is a problem that the fixing strength is weak.

Further, since there is no member for attracting the magnetic flux outside the voice coil, there is a problem that the cost is increased to increase the density of the magnetic flux radiated from the center plate. Further, since the voice coil is fixed directly to the diaphragm and the heat conducting member is not arranged outside the voice coil, the heat dissipation is poor and a high output cannot be produced.

The present invention has been made in view of the above points, and an object of the present invention is to provide a structure of a speaker unit which is low in manufacturing cost and capable of producing high output.

[0008]

According to the structure of a speaker unit of the present invention, a protector, which supports a diaphragm having a voice coil fixed at its center through an edge and a dustproof damper, is fastened to a center pole provided on a frame. By being attached, the repulsive magnetic circuit having the center pole inserted therein is pressed and fixed.

Further, in the structure of the speaker unit, the protector and the frame are formed concentrically,
The protector is fastened to the center pole provided on the frame by screwing a screw provided on one of the center axes into a screw hole provided on the other center axis.

In addition, in the structure of each speaker unit, a plurality of columns provided in the protector and having a portion close to the voice coil made of a magnetic material are inserted through holes provided in the diaphragm to apply pressure to the frame. As a result, the protector is firmly supported by the frame.

Further, in the structure of each of the speaker units, the protector is configured to hold the lighting unit of the speaker unit and its wiring.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 is a plan view showing a speaker unit according to a first embodiment of the present invention, and FIG. 2 is a sectional view showing the speaker unit. The center pole 1a provided on the frame 1 shown in the drawing has the magnet 6, the center plate 7, and the magnet 6 inserted in this order. The magnetic circuit fixed to the center pole 1a is the magnet 6,
6 are arranged so that the same poles face each other to form a repulsive magnetic circuit in which a magnetic field is emitted outward from the outer periphery of the center plate 7.

The protector 2 made of aluminum is arranged on the front surface of the speaker unit to protect the diaphragm 3, and a plurality of windows are opened to allow the sound emitted from the diaphragm 3 to pass therethrough. The outer peripheral portion of the diaphragm 3 is adhered to the edge 4, and the inner peripheral portion is adhered to the dustproof damper 5.

An outer peripheral portion of the edge 4 is adhered to a cylindrical edge mounting portion 2c provided on the protector 2, and an upper portion of the dustproof damper 5 is adhered to a lower surface of a central portion of the protector 2. In this way, the diaphragm 3 is supported by the protector 2 via the edge 4 and the dustproof damper 5. The voice coil 8 arranged in the magnetic field of the repulsive magnetic circuit is fixed to the inner circumference of the diaphragm 3, and the voice coil 8 is connected to the terminal 11 fixed to the frame 1. Dustproof damper 5 is diaphragm 3
Support so that it can vibrate and prevent foreign matter from entering the magnetic gap.

The protector 2 further includes eight inner support columns 2
d is provided concentrically, extends through the hole 3a of the diaphragm 3 and extends downward, and the vibration-proof rubber 12 is fixed to the tip thereof. A portion of the inner column 2d close to the voice coil 8 is formed of a magnetic body 2e by insert molding.

Eight outer columns 2f are concentrically provided on the outer peripheral portion of the protector 2, and the vibration-proof rubber 1 is provided at the tip thereof.
2 is stuck. At the center of the protector 2, there is a screw 2
a is formed, and a cylindrical magnet pressing portion 2b is formed on the outside thereof.

The speaker unit is completed by screwing the screw portion 2a of the protector 2 having the diaphragm 3 attached thereto into the screw hole provided at the center of the center pole. The magnetic circuit composed of the magnets 6 and 6 and the center plate 7 has a magnet pressing portion 2b.
It is pressed by and is firmly fixed to the center pole 1a.

Further, the anti-vibration rubbers 12, 12, ... Fixed to the inner strut 2d and the outer strut of the protector 2 are pressed against the frame 1 so that the protector 2 is firmly fixed to the frame 1. Further, the magnetic body 2e arranged close to the voice coil 8 strengthens the magnetic flux of the repulsive magnetic circuit and dissipates the heat generated from the voice coil 8. The speaker unit thus completed is attached to the baffle 10 by the attaching screws 9, 9 ... Through the holes provided in the frame 1.

FIG. 3 is a plan view showing a speaker unit according to a second embodiment of the present invention, and FIG. 4 is a sectional view showing the speaker unit. In this example, the neon lamp 13 is attached to the protector 2 and the wiring member 1 laid on the protector 2
Powered by 4. The other structure is similar to that of the first embodiment. Since the protector 2 has a support column 2d extending toward the frame 1, wiring can be performed when the speaker unit is assembled by laying the wiring member 14 on the support column 2d, and the manufacturing process is simplified.

In recent years, it has become popular for the on-vehicle speaker to make a speaker unit put in a box shine with a neon lamp, but it is difficult to directly attach the neon lamp to the speaker unit of the related art. It was mounted on and illuminated through a transparent acrylic plate.

According to the present invention, the protector can be formed by injection molding, a lighting fixture such as a neon lamp can be installed in a place where the protector has high illumination efficiency, and the neon lamp and the wiring material can be covered. It is possible to form a groove for arranging the wiring material on the column and wire it to the back of the frame, and the connection with the power supply becomes easy. Further, it is possible to provide lighting that makes the speaker unit stand out without enclosing the speaker unit with an acrylic plate or a translucent cabinet.

[0022]

According to the structure of the speaker unit of the present invention, the manufacturing cost can be reduced by simplifying the manufacturing process. Further, the magnetic circuit can be firmly fixed, and the magnetic flux of the magnetic circuit can be increased at low cost. Since the heat generated by the voice coil can be efficiently dissipated, the sound quality and reliability can be satisfied at the same time. In addition, the appearance can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a speaker unit according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a plan view showing a speaker unit according to a second embodiment of the present invention.

4 is a cross-sectional view taken along the line AA in FIG.

FIG. 5 is a plan view showing an example of a conventional speaker unit.

6 is a cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

1 frame, 1a center pole, 2 protector, 2a screw part, 2b magnet holding part, 2c edge mounting part, 2d inner column, 2e
Magnetic substance, 2f Outer support column 3, Vibration plate, 3a Hole 4 Edge 5 Dustproof damper 6 Magnet 7 Center plate 8 Voice coil 9 Mounting screw 10 Baffle 11 Terminal 12 Antivibration rubber 13 Neon lamp 14 Wiring material 15 Protector 16 Plain washer

Claims (4)

(57) [Claims] 1. A repulsive magnetism in which a center pole is inserted by fastening a protector, which supports a diaphragm having a voice coil fixed to the center through an edge and a dust-proof damper, to a center pole provided in a frame. A structure of a speaker unit configured to press and fix a circuit. 2. The center provided with the protector on the frame by concentrically forming the protector and the frame, and screwing a screw provided on one of the central axes into a screw hole provided on the other central axis. The structure of the speaker unit according to claim 1, which is fastened to the pole. 3. The protector is firmly fixed to the frame by applying pressure to the frame by inserting holes provided in the vibrating plate through a plurality of stanchions provided in the protector and made of a magnetic material in a portion close to the voice coil. The structure of the speaker unit according to claim 1 or 2, which is configured to be supported. 4. The structure of the speaker unit according to claim 1, wherein the protector is configured to hold a lighting unit of the speaker unit and its wiring.