KR101101991B1 - Slim type speaker - Google Patents

Abstract

The present invention relates to a slim speaker, and more particularly, a frame, an internal magnet provided in the frame, a coil provided in the vicinity of the magnet is wound around its outer circumferential surface, and a bobbin supported by the frame by a damper; In the speaker having an edge coupled to the diaphragm and the elastically deformable material coupled to generate a sound wave, and having an edge connecting the diaphragm and the frame,

The diaphragm is disposed on the lower side of the damper and coupled to the bobbin, but the slim type speaker is configured to be inclined downward as the distance from the bobbin.

Slim speaker, damper, diaphragm, bobbin

Description

Slim type speaker {Slim type speaker}

The present invention relates to a slim speaker, and more particularly to a slim speaker having a thin thickness but the overall volume is not reduced.

In general, a speaker converts an electrical signal output from an amplifier into a sound, and a moving coil speaker is mainly used, but in particular, an electrostatic speaker, a ribbon speaker, and a piezoelectric type ( piezoelectric) speaker.

The speaker 100 which is not assembled in a box is generally called a speaker unit or a driver, and the moving coil speaker includes a frame 110 and the frame (as shown in FIGS. 1 and 2). 110 is provided inside the magnet 111 consisting of a ring, and the upper plate 112, the lower plate 113 is installed above and below the magnet 111 to form a magnetic circuit together with the pole piece 114. .

In addition, the coil 122 provided near the magnet is wound around the outer circumferential surface of the bobbin 120, and the bobbin 120 has a central portion supported by the frame 110 by a damper 121 to move upward and downward. This is suppressed and configured to enable vibration in the vertical direction. In addition, the upper end of the bobbin 120 is coupled to the diaphragm 130, the diaphragm 130 is connected to the frame 110 by an edge 140 made of an annular shape by the elastically deformable material.

On the other hand, a magnetic force is formed between the upper plate 112 and the pole piece 114 by a magnet, and when a current is applied to the coil 122, the diaphragm 130 vibrates up and down by the force of Lorentz, while To transmit sound.

The speaker according to the related art has a curved shape in which the diaphragm is concave in order to maximize the vibration area, and is gradually curved upward as the distance from the bobbin is increased, and the damper is disposed below the diaphragm.

According to such a configuration, the height of the overall speaker is inevitably increased. That is, since the speaker should have at least the height of the height of the diaphragm plus the thickness of the upper plate, the lower plate and the magnet, there is a disadvantage in that the overall thickness increases only.

On the other hand, attempts have been made to reduce the thickness of the diaphragm, the top plate, the bottom plate, and the magnet in order to lower the overall thickness. However, in the case of reducing the thickness of each component, the strength of the magnetic force is weakened, so that the overall volume is reduced. There is a problem that has the disadvantage that can only be reduced.

The present invention has been made to solve the above-mentioned problems, and more specifically, an object of the present invention is to provide a slim speaker which does not reduce the volume while reducing the overall thickness.

A slim speaker according to the present invention for achieving the above object, the frame, an internal magnet provided in the frame, a coil provided in the vicinity of the magnet is wound around its outer peripheral surface and supported by the damper to the frame, In the speaker coupled to the bobbin is formed in an annular shape by a diaphragm and an elastically deformable material to generate sound waves, the speaker having an edge connecting the diaphragm and the frame,

The diaphragm is disposed on the lower side of the damper and coupled to the bobbin, and configured to be inclined downward from the center to the edge side.

In the slim speaker,

Preferably, the damper is provided with a plurality of through holes penetrating the upper and lower surfaces.

In the slim speaker,

Inside the bobbin is provided a central plate disposed above the inner magnet and the inner magnet,

On the outside of the bobbin is provided an outer magnet disposed to face the inner magnet and an upper plate disposed on an upper side of the outer magnet and having a coil disposed between the central plate,

The inner magnet and the outer magnet is preferably magnetically connected to each other by a lower plate.

In the slim speaker,

The edge of the diaphragm is preferably disposed at a position equal to or lower than the upper plate.

In the slim speaker,

The lower plate is preferably in contact with the lower surface of the inner magnet and the outer magnet.

The upper plate is reduced in height as its upper surface moves away from a portion adjacent to the bobbin, but preferably has a shape corresponding to the diaphragm.

Slim speaker according to the present invention, as well as changing the position of the damper and the diaphragm, as opposed to the arrangement of the diaphragm by placing the entire position as effectively as possible, as well as the effect that the volume is almost reduced. .

In addition, the slim speaker according to the present invention, by forming a plurality of through-holes in the damper has the effect that the sound from the diaphragm by the damper can be emitted to the outside as much as possible so as not to reduce the volume.

In addition, the slim speaker according to the present invention has the effect of increasing the strength of the magnetic force by increasing the strength of the magnetic force by installing a magnet not only on the outside of the bobbin, but also inside.

In addition, the upper plate according to the present invention has the effect of ensuring the maximum space of the shankdong of the diaphragm by changing the shape of the upper surface in accordance with the shape of the diaphragm, thereby contributing to the slimming of the overall speaker.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

Slim speaker 1 according to the present invention, the frame 10, the lower plate 20, the inner magnet 30, the center plate 40, the outer magnet 50, the upper plate 60, the bobbin 70 , Damper 80, diaphragm 81, and edge 91.

The frame 10 forms the body of the slim speaker 1, preferably made of a metal material, and has a tray shape as a whole. Specifically, it consists of the lower board 11, the side board 12 extended upward from the said lower board 11, and the latching plate 13 extended outward from the upper end of the said side board 12. As shown in FIG.

A lower hole 11a to which the lower plate 20 can be coupled is provided at the center of the lower plate 11, and an air hole 12a is formed in the side plate 12. These air holes 12a allow air inside and outside the frame 10 to circulate with each other.

The lower plate 20 is preferably made of a metal material having a high magnetic flux density while having a low iron loss, thereby allowing the inner magnet 30 and the outer magnet 50 to be magnetically connected to each other. Specifically, it is made in the form of a disk, it is preferable that the inner magnet 30 and the outer magnet 50 has a size enough to be mounted on both. The lower plate 20 is coupled to the lower hole 11a of the lower plate 11 of the frame 10. On the other hand, on the central upper surface of the lower plate 20 is formed a locking jaw (20a) that can be fixed by mounting the inner magnet (30).

The inner magnet 30 is fixed by the locking step (20a) of the lower plate 20, specifically, is disposed in the central portion of the lower plate (20). The inner magnet 30 is made of a disc but is arranged inside the bobbin 70.

The central plate 40 is disposed on the upper side of the inner magnet 30, and is specifically mounted on the inner side of the inner magnet 30. The central plate 40 is preferably made of a metal material having a high magnetic flux density while having a low iron loss. The central plate 40 is formed in a substantially disk form, it is preferable to have a larger diameter than the inner magnet (30).

The external magnet 50 is disposed on the outside of the bobbin 70, specifically, mounted on the lower plate 20. The outer magnet 50 has a ring shape as a whole, the inner magnet 30 is disposed in the center thereof. That is, the inner surface of the outer magnet 50 is disposed to face the outer surface of the inner magnet 30. On the other hand, the outer magnet 50 is magnetically placed in the connection state with the inner magnet 30 by the lower plate (20).

The upper plate 60 is disposed on the upper side of the outer magnet 50, and is formed in a ring shape as a whole. The upper plate 60 is disposed at a height corresponding to the central plate 40, and a space called magnetic void is formed between the upper plate 60 and the central plate 40. The coil 71 of the bobbin 70 is located in the magnetic gap. On the other hand, the upper plate 60 is preferably made of a metal material having a high magnetic flux density while having a low iron loss. The upper plate 60 has a form in which the height thereof decreases as the upper surface of the upper plate 60 moves outward from the portion close to the bobbin 70. That is, it is made in the form of a right triangle, the thickness of the portion adjacent to the bobbin 70 and the greater the distance away from the bobbin 70 is reduced in thickness. The shape of the upper surface of the upper plate 60 will have a shape corresponding to the cross-sectional shape of the diaphragm 81 described later.

The bobbin 70 is formed in a substantially cylindrical shape, specifically, the lower end is disposed between the magnetic pores, which is a space between the upper plate 60 and the lower plate 20, and the upper end protrudes therefrom and is disposed above. In such magnetic voids, the coil 71 is wound around its outer circumferential surface. On the other hand, the coil 71 is connected to an external power source by a predetermined wire (not shown).

The dust cap 72 is disposed above the bobbin 70. The dust cap 72 is formed in the form of a cap as a whole, to close the upper portion of the dust cap 72 serves to prevent the dust from entering the inside.

The damper 80 has a ring-shaped bone tin structure and expands and contracts in response to the movement of the bobbin 70. The damper 80 is made of a material such as foamed urethane resin, foamed rubber, SBR rubber or fabric such that a large operating load is not applied to the bobbin 70. The damper 80 is disposed above the bobbin 70. Specifically, the inside is attached to the upper outer peripheral surface of the bobbin 70, the outside is fixedly coupled to the locking plate 13 of the frame 10.

In the damper 80, a plurality of fine through holes 81 penetrating the upper and lower surfaces thereof are formed. The through hole 81 serves as a passage to allow the sound source from the diaphragm 81 to go out of the outside.

The diaphragm 81 is a sound source of the slim speaker 1, and is made of pulp and resin having both high stiffness and appropriate internal loss as main materials. The outer peripheral end portion of the diaphragm 81 is fixed to the frame 10 via the edge 91. On the other hand, the edge 91 is formed of a material such as foamed resin, SBR, rubber or cloth so as not to apply a dynamic load to the diaphragm 81. At this time, foamed urethane resin, foamed rubber, etc. are mentioned as foamed resin. The diaphragm 81 has an inner side attached to the outer circumferential surface of the bobbin 70, and the outer side surface is coupled to the edge 91 as described above. The shape of the diaphragm 81 is approximately in the form of a cone, but it will be a feature of the present invention is configured in the form of an inverted cone. Specifically, the diaphragm 81 is inclined downward from the center toward the edge. In addition, the edge of the diaphragm 81 is preferably disposed at a position equal to or lower than the upper plate 60.

In addition, in the present invention, the damper 80 is disposed above and the diaphragm 81 is disposed below the damper 80, so that the structure can be optimized.

That is, in a general speaker, a certain height occupied by a magnet, a lower plate, and an upper plate is required, and since a diaphragm is formed thereon, the overall height is inevitably high. On the contrary, in the present invention, the diaphragm 81 is disposed upside down, and as the edge portion of the diaphragm 81 is inclined downward, the edge portion may extend to reach the bottom of the upper plate 60. . This can reduce the thickness of the speaker 1 more efficiently by using the height of the magnet, the lower plate 20 and the upper plate 60 overlapping with the height of the diaphragm 81. In addition, as the diaphragm 81 is disposed below the damper 80, the diaphragm 81 may be blocked by the damper 80, thereby allowing the diaphragm 81 to descend downward.

The slim speaker according to the present invention has the following effects.

When a current is applied through a wire to drive the speaker, the bobbin portion reciprocates up and down by the Fleming's left hand law due to the magnetic flux between the pores. The reciprocating motion vibrates the diaphragm constituting the bobbin part together up and down to compress and expand the air contacting the upper diaphragm and the lower diaphragm to generate sound waves. At this time, the generated sound waves are discharged to the outside through the damper, and the sound waves are discharged to the outside through the through-hole of the damper.

On the other hand, according to the present invention, as the diaphragm is disposed below the damper and forms the cone upside down, the thickness of the overall speaker can be reduced as described above.

Along with this, the vibration area of the diaphragm is not reduced or the thickness of other magnets, the upper plate, and the lower plate is not reduced so that the volume is not reduced. That is, while reducing the overall thickness there is no effect of reducing the overall volume.

In addition, the present invention has the advantage that the overall magnetic force is increased by placing the internal magnet in the interior as well as the external magnet to obtain a more enhanced volume.

In addition, in the present invention, since the shape of the upper plate is made similar to the shape of the diaphragm, it is possible to form a space in which the diaphragm can be sufficiently lowered, so that there is an advantage of more efficient space utilization.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

1 is a perspective view of a speaker according to the prior art.

2 is a cross-sectional view of FIG.

3 is a cross-sectional view of a slim speaker according to a preferred embodiment of the present invention.

<Detailed Description of Drawings>

1 ... slim speaker 10 ... frame

11 Bottom plate 12 Side plate

13 ... locking plate 20 ... lower plate

30 Internal magnet 40 Central plate

50.External magnet 60 ... Upper plate

70 ... bobbin 71 ... coil

72 ... dust cap 80 ... damper

81 Through hole 90 Vibration plate

91 ... Edge

Claims (6)

A frame, an inner magnet provided inside the frame, a coil provided near the magnet is wound around its outer circumferential surface, a bobbin supported by the frame by a damper, and a diaphragm and elastically deformable material combined with the bobbin to generate sound waves. In the ring formed by the speaker having an edge connecting the diaphragm and the frame, The diaphragm is disposed in the lower side of the damper is coupled to the bobbin, it is configured in the form inclined downward toward the edge side from the center, The damper is characterized in that a plurality of through holes penetrating the upper and lower surfaces are formed. delete The method of claim 1, Inside the bobbin is provided a central plate disposed above the inner magnet and the inner magnet, On the outside of the bobbin is provided an outer magnet disposed to face the inner magnet and an upper plate disposed on an upper side of the outer magnet and having a coil disposed between the central plate, Slim speaker, characterized in that the inner magnet and the outer magnet is magnetically connected to each other by a lower plate. The method of claim 3, The edge of the diaphragm is a slim speaker, characterized in that disposed on the same or lower position than the upper plate. The method of claim 3, Slim speaker, characterized in that the lower plate is in contact with the lower surface of the inner magnet and the outer magnet. The method of claim 3, The upper plate is reduced in height as the upper surface is moved away from the portion close to the bobbin, a slim speaker characterized in that it has a shape corresponding to the diaphragm.

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