KR20090103031A - Speaker - Google Patents

Abstract

PURPOSE: A speaker is provided to reproduce a uniform sound in which the peak and deep are reduced. CONSTITUTION: A speaker includes a frame(110), a magnetic circuit part(120) and a vibrator(130). The magnetic circuit part is combined with the frame to generate the magnetic force. The vibrator includes a voice coil(131) and a vibration plate(133) and vibrates by reacting with the magnetic circuit part when receiving power. The vibration plate has a cone shape. The outer circumference of the vibration plate is supported by the frame. The inner circumference of the vibration plate is combined with the voice coil to reproduce a sound as vibrating by the voice coil. In the vibration plate, plural reinforcing ribs(134) of each frequency band are formed.

Description

Speaker {SPEAKER}

The present invention relates to a speaker.

A speaker is an acoustic device that converts an electrical signal into vibration of a diaphragm to generate a small density wave in the air to radiate sound waves.

The diaphragm of the speaker is the most important component for determining sound quality, and the diaphragm of the conventional speaker will be described with reference to FIG. 1.

1 is a perspective view of a diaphragm and an edge of a conventional speaker.

As shown, the diaphragm 10 is formed in a cone shape and is supported by a frame (not shown) via the edge 20. The diaphragm 10 reproduces sound while vibrating by a voice coil (not shown) which vibrates by an action with a magnetic circuit unit (not shown).

At this time, when the diaphragm 10 vibrates with a piston movement, peak and deep are reduced to improve sound quality. Due to the characteristics of the diaphragm 10 having a very thin thickness, split vibration is generated to form a higher-order vibration mode for each frequency band. There is a disadvantage that the sound quality is degraded.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a speaker that can improve the sound quality by suppressing the split vibration of the diaphragm.

Speaker according to the present invention for achieving the above object, the frame; A magnetic circuit unit coupled to the frame and generating a magnetic force; Vibration having a vibration plate that is vibrated by the magnetic circuit portion and is formed in a cone shape when the power is applied, the outer peripheral surface side is supported by the frame and the inner peripheral surface side is coupled to the voice coil and vibrates by the voice coil. In the speaker provided with a part,

The diaphragm is provided with a plurality of reinforcing ribs for each frequency band.

Hereinafter, a speaker according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of a speaker according to an embodiment of the present invention, Figure 3 is a perspective view of the diaphragm shown in FIG.

As shown, the through hole 113 is formed in the central portion of one surface, the frame 110 is opened on the other surface.

Hereinafter, in referring to the plane and the direction of the other components including the frame 110, the plane and direction toward the vertical direction upward of the frame 110 "top and top", the plane and direction toward the vertical bottom " Lower surface and lower side ".

The lower surface of the frame 110 is coupled to the magnetic circuit unit 120 for generating a magnetic force, the vibration unit 130 for generating an electric force is installed inside the frame 110.

The magnetic circuit unit 120 has a plate 121, a magnet 123, and a yoke 125. The plate 121 is provided in a ring shape and coupled to the bottom surface of the frame 110 at the through hole 113, and the magnet 123 is provided in a ring shape and coupled to the bottom surface of the plate 121. The yoke 125 protrudes upward from the center of the base plate 125a and the base plate 125a coupled to the bottom surface of the magnet 123 and passes through the magnet 123 and the plate 121. Has At this time, a gap G is formed between the pole 125b and the magnet 123 and between the pole 125b and the plate 121.

The vibrator 130 has a voice coil 131, a diaphragm 133, an edge 135, and a damper 137.

The voice coil 131 has a bobbin wound on the bobbin 131a and the outer peripheral surface of the bobbin 131a positioned at the gap G of the magnetic circuit unit 120 and at the upper side of the pole 125b. 131b).

The diaphragm 133 is formed in a cone shape so that the inner circumferential surface side is coupled to the upper outer circumferential surface of the bobbin 131a. The diaphragm 133 is supported by the frame 110 via the edge 135. That is, the outer peripheral surface side of the edge 135 is coupled to the frame 110, the inner peripheral surface side is coupled to the outer peripheral surface side of the diaphragm 133.

 Thus, when external power is supplied to the coil 131b, the voice coil 131 vibrates in the vertical direction due to the electromagnetic force generated between the coil 131b and the magnetic circuit unit 120, and is caused by the voice coil 131. The diaphragm 133 vibrates up and down to reproduce sound.

The damper 137 is provided in a ring shape and the outer peripheral surface side thereof is coupled to the frame 110, and the inner peripheral surface side thereof is coupled to the bobbin 131a. The damper 137 prevents the voice coil 131 from flowing from side to side when the voice coil 131 vibrates, thereby preventing the vibration plate 133 from flowing from side to side.

The diaphragm 133 is extremely thin in nature. As a result, divided vibrations are generated which form higher-order vibration modes for each frequency band.

The diaphragm 133 of the speaker according to the present embodiment is formed so as to improve the sound quality by suppressing the divided vibration for each frequency band.

In detail, a plurality of reinforcing ribs 134 for each frequency band are formed in the diaphragm 133. The reinforcing rib 134 includes a ring-shaped first reinforcing rib 134a formed on the outer circumferential surface side of the diaphragm 133, a plurality of second reinforcing ribs 134b and the first reinforcing ribs formed on the inner circumferential surface side of the diaphragm 134. And a plurality of third reinforcing ribs 134c formed at portions of the diaphragm 133 between the 134a and the second reinforcing ribs 134b. In this case, the second reinforcing rib 134b and the third reinforcing rib 134c may each have a ring shape with an interval along the circumferential direction of the diaphragm 133.

Then, the split vibration occurring in the low band is suppressed by the first reinforcing rib 134a formed on the outer circumferential surface side of the diaphragm 134, and the high frequency band is suppressed by the second reinforcing rib 134 b formed on the inner circumferential surface side of the diaphragm 134. Since the generated divided vibration is suppressed and the divided vibration generated in the mid range is suppressed by the third reinforcing rib 134c, the divided vibration of the diaphragm 134 is suppressed in all frequency bands. Therefore, the peak and the depth of the sound reproduced by the diaphragm 133 are reduced to reproduce a uniform sound.

The second reinforcing rib 134b and the third reinforcing rib 134c are preferably formed in an alternate form. That is, it is preferable that the third reinforcement ribs 134c are positioned between the second reinforcing ribs 134b and the other second reinforcing ribs 134b adjacent to each other. This is to prevent another split vibration from occurring.

Since the first reinforcing rib 134a is formed on the outer circumferential surface side of the diaphragm 133 to which the edge 135 is coupled, unnecessary vibration caused by reverse resonance of the edge 135 is also suppressed.

The first to third reinforcement ribs 134a, 134b, and 134c may be formed to be convex upward or convex downward.

The first reinforcing ribs 134a may be formed in plural numbers having a distance along the circumferential direction of the diaphragm 133. At this time, the first reinforcing rib 134a and the second reinforcing rib 134b are formed to alternate with each other, and the second reinforcing rib 134b and the third reinforcing rib 134c are interchanged with each other. It is formed in the form.

Reference numeral 140 in FIG. 2 denotes a cap that prevents foreign matter from flowing into the inside of the voice coil 131 and the magnetic circuit unit 120, 150 denotes a terminal board to which an external power source is connected, and 155 denotes a coil 131b. It is a tinsel wire which connects the terminal board 150. FIG.

As described above, in the speaker according to the present invention, a plurality of reinforcing ribs are formed on the outer circumferential surface side, the inner circumferential surface side, and a portion between the outer circumferential surface and the inner circumferential surface of the diaphragm, respectively. Therefore, since the divided vibration of the diaphragm is suppressed in all frequency bands, uniform sound with reduced peak and deep is reproduced.

In the above, the present invention has been described in accordance with one embodiment of the present invention, but those skilled in the art to which the present invention pertains have been changed and modified without departing from the spirit of the present invention. Of course.

1 is a perspective view of a diaphragm and an edge of a conventional speaker.

2 is a cross-sectional view of a speaker according to an embodiment of the present invention.

3 is a perspective view of the diaphragm and edge shown in FIG.

Explanation of symbols on the main parts of the drawings

110 frame 120 magnetic circuit part

130: vibrating unit

Claims (5)

frame; A magnetic circuit unit coupled to the frame and generating a magnetic force; Vibration having a vibration plate that is vibrated by the magnetic circuit portion and is formed in a cone shape when the power is applied, the outer peripheral surface side is supported by the frame and the inner peripheral surface side is coupled to the voice coil and vibrates by the voice coil. In the speaker provided with a part, The diaphragm is characterized in that a plurality of reinforcing ribs for each frequency band formed. The method of claim 1, The reinforcing ribs may include a ring-shaped first reinforcing rib formed on an outer circumferential surface side of the diaphragm, a plurality of second reinforcing ribs formed on an inner circumferential surface side of the diaphragm and having a distance along a circumferential direction of the diaphragm, and the first reinforcing ribs. And a plurality of third reinforcing ribs formed on the diaphragm portion between the second reinforcing ribs and having a distance along the circumferential direction of the diaphragm. The method of claim 2, And the second reinforcing rib and the third reinforcing rib are formed to alternate with each other. The method of claim 1, The reinforcing ribs are formed on the outer circumferential surface side of the diaphragm and have a plurality of first reinforcing ribs formed on the inner circumferential surface side of the diaphragm and have a spacing along the circumferential direction of the diaphragm. And a plurality of third reinforcing ribs formed in the diaphragm portion between the first reinforcing ribs and the second reinforcing ribs and having a distance along the circumferential direction of the diaphragm. The method of claim 4, wherein And the first reinforcing rib and the second reinforcing rib are formed in an alternating form, and the second reinforcing rib and the third reinforcing rib are formed in an alternating form.