JPH07170596A - Edgeless speaker - Google Patents

Abstract

PURPOSE:To provide an edgeless speaker producing cleaer sound quality which enhances ambience. CONSTITUTION:A voice coil 3 is installed on a base part with small diameter of a conical corn 3 being a vibration plate. A magnet 2 inside a yoke 1 is provided near it and the outer peripheral part of the base of the corn 4 is supported by a damper 6 inside a frame 5. A front edge part 7 with the expanded diameter of the corn 3 and a front rim 11 of the frame 5 surrounding the corn 3 are separated and a supporting gap 13 is connected inside the base of the corn 3 and a net 14 is attached in front of the corn 3. The end of a prop 15 is connected at right angles to the net 14. The tip of a support 15 and the front rim 11 of the frame 5 are connected by a support arm 16. The corn 3 is supported by a damper 6 at the base side and at the center part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an edgeless speaker that supports a cone serving as a diaphragm from the center side.

[0002]

2. Description of the Related Art Generally, in the structure of an audio speaker, for example, as shown in FIG. 3, a magnet 2 is attached inside a yoke 1, and a base portion having a small diameter of a conical cone 3 serving as a vibrating plate is provided inside the yoke 2. The voice coil 4 is provided around the base and is wound around the base so as to face the magnet 2 so that an electric signal is sent to the voice coil 4.
The cone 3 is vibrated by the action of magnetic change to be converted into voice. In addition, the support structure of the cone 3 is such that the outer periphery of the cone 3 on the base side is supported by a damper 6 having a corrugated cross section provided inside the frame 5, and the front side edge portion 7 of the cone 3 having an enlarged diameter is attached to the front surface of the frame 5. The cone 3 is connected to an edge support ring 8 having a corrugated cross section attached to the peripheral edge 11 to support the cone 3 at two positions, the base side and the front side.

In a conventional speaker, a cone 3 is supported by a damper 6 having a corrugated cross section, which serves as a fulcrum, on the outer circumference on the base side.
The cone 3 is supported so as not to interfere with the vibration in the front-rear direction, but with this support alone, the cone 3 falls over with the flexible damper 6 as the pivot. For this reason, the front side edge portion 7 of the cone 3 having the largest vibration is also connected to the edge support ring 8 attached to the front peripheral edge 11 of the frame 5 so as to be supported from the front side. The edge support ring 8 is formed of foam rubber or the like in a wave-shaped cross section so as not to hinder vibration as much as possible, but the front side edge portion 7 of the cone 3 having the largest vibration is joined to the cone 3. Since the load becomes large, there is a problem that it takes time for the vibration of the cone 3 to reach the maximum speed.

The speaker is fixed to the cabinet 10 serving as a resonance box on the tip side of the frame 5, and the vibration of the cone 3 changes the internal pressure in the vicinity of the cone in the cabinet 10. However, when the internal pressure rises, the vibration of the cone 3 occurs. There is a problem that is disturbed. For this reason, the conventional speaker cannot provide clear and realistic sound quality, and there has been a demand for countermeasures against it.

[0005]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The present invention provides an edgeless speaker which can provide clear and realistic sound quality as a result of various studies in view of the above problems.

[0006]

According to the present invention, a voice coil is attached to a base having a small diameter of a cone having a conical shape as a vibrating plate, and a magnet attached inside the yoke is provided in the vicinity of the voice coil. The outer periphery of the base of the cone is supported by a damper provided inside the frame, and the front edge of the cone whose diameter is enlarged and the front peripheral edge of the frame surrounding the cone are separated from each other, and the inside of the base of the cone is supported. A basket-like support cap is connected to, a net is attached to the front side of this support cap, and the base end of the column is connected orthogonally to this net, and the tip of this column and the front peripheral edge of the frame are supported arms. And the cone is supported by the damper on the base side and the center side.

[0007]

In the edgeless speaker of the present invention, when an electric signal is applied to the voice coil, the cone vibrates due to the magnetic action. At this time, the cone is supported by a damper mounted on the outer periphery on the base side as a fulcrum and vibrates back and forth. On the other hand, the front peripheral edge of the cone is free, and the inner peripheral portion on the base side of the cone is connected to the front peripheral edge of the frame via a support cap having a net attached to the front surface, a column and a support arm. Since the support cap and the support are connected by a net, the vibration in the front-back direction is absorbed here, and the support is supported in the circumferential direction, so that the vibration of the cone is not hindered and the fall is prevented.

Further, since there is a gap between the front edge portion of the cone where a large vibration is generated and the peripheral edge of the front surface of the frame, and there is a free state in which no connection is made, the vibration of the cone reaches the maximum speed. Time is fast, and since air circulates in the cabinet through the gap, there is little fluctuation in internal pressure that interferes with vibration of the cone, and a clear and realistic sound quality is obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to FIGS. As shown in FIG. 2, a magnet 2 is attached inside a yoke 1, a cone-shaped base 3 having a small diameter is provided inside the yoke 1, and a voice coil 4 is wound around the base. The magnet 2 is arranged so as to face the magnet 2. The outer periphery of the cone 3 on the base side is a damper 6 having a corrugated cross section provided inside the frame 5.
It is supported by and is the fulcrum of cone 3. A front edge portion 7 having an enlarged diameter of the cone 3 and a front peripheral edge 11 of a frame 5 surrounding the cone 3 are separated from each other, and a gap 12 is formed therebetween.

A center cap 9 is attached to the inner periphery of the cone 3 on the base side, and a cylindrical basket-shaped support cap 13 is attached to the inner periphery of the front cone 3.
The support cap 13 is formed of thin wire or plastic to be lightweight, and has a net 14 formed by knitting nylon fibers in a vertical and horizontal direction attached to the front side. The base end of the support column 15 is connected to the center of the net 14 at right angles to it, and the tip of the support column 15 is connected to the center of a thin plate-shaped support arm 16 as shown in FIG. Further, both ends of the support arm 16 are connected to brackets 17, 17 attached to the front peripheral edge 11 of the frame 5, so that the cone 3 is supported on the center side.

Therefore, in the edgeless speaker having the above structure, when an electric signal is applied to the voice coil 4 disposed inside the magnet 2 as shown in FIG. Vibrates and produces sound. At this time, the cone 3 is supported by a damper 6 having a wave-shaped cross section attached to the outer circumference on the base side as a fulcrum, and vibrates back and forth. On the other hand, the inner peripheral portion of the cone 3 on the base side is a cylindrical basket-shaped support cap 13, a support column 15, and a support arm 16.
The cone 3 is supported by being connected to the front edge 11 of the frame 5 via the.

In this case, the cylindrical cage-shaped support cap 13 is attached in the vicinity of the damper 6 serving as a fulcrum, and since the support cap 13 and the support 15 are connected by the net 14, vibration in the front-back direction is absorbed here. Since it is supported in the circumferential direction, the vibration of the cone 3 is not hindered. In addition, since a ring-shaped gap 12 is provided between the front edge 7 of the cone 3 and the front peripheral edge 11 of the frame 5 where particularly large vibration is generated, the vibration of the cone 3 is at the maximum speed because it is not connected. The vibration will increase rapidly until the time reaches.

The speaker is fixed to the cabinet 10 serving as a resonance box at the tip side of the frame 5, but a gap 12 is formed between the front edge portion 7 of the cone 3 and the front peripheral edge 11 of the frame 5. Therefore, when the internal pressure in the vicinity of the cone in the cabinet 10 changes due to the vibration of the cone 3 and the internal pressure rises, the internal air is discharged from the gap 12 and the air is sucked from the gap 12 which becomes negative pressure. Therefore, since the air inside and outside flows through the gap 12, the fluctuation of the internal pressure is small, the vibration of the cone 3 is not disturbed, and a clear and realistic sound quality is obtained.

In the above embodiment, the net 14 is made of thin nylon fibers knitted in the lengthwise and crosswise directions, but it is finely knitted into a cloth, or thin fibers are stretched radially from the center. Any structure may be used as long as it can absorb the vibration in the direction and can support it in the circumferential direction.
Further, the support arm 16 is not limited to the rod shape, but may be a cross shape such as a cone 3.
Any shape may be used as long as it does not largely block the front surface of the.

[0015]

As described above, according to the edgeless speaker of the present invention, the front edge portion of the cone is freed, a gap is provided between the front edge of the frame and the front edge of the frame, and the damper supporting the outer periphery of the cone is provided. Even from the inside of the vicinity, it is supported by a structure that absorbs vibration in the front-rear direction and is fixed against movement in the circumferential direction, and supports the cone from inside and outside to obtain a clear and realistic sound quality.

[Brief description of drawings]

FIG. 1 is a perspective view showing an edgeless speaker according to an embodiment of the present invention.

FIG. 2 is a sectional view of the edgeless speaker shown in FIG.

FIG. 3 is a cross-sectional view showing a conventional speaker.

[Explanation of sign]

 1 Yoke 2 Magnet 3 Cone 4 Voice Coil 5 Frame 6 Damper 7 Front Edge 8 Edge Support Ring 9 Center Cap 10 Cabinet 11 Front Edge 12 Gap 13 Support Cap 14 Net 15 Strut 16 Support Arm 17 Bracket

Claims (1)

[Claims] 1. A voice coil is attached to a base having a small diameter of a cone having a conical shape to be a vibrating plate, and the voice coil is placed in proximity to the base.
A magnet is installed inside the yoke, and the outer circumference of the base side of the cone is supported by a damper installed inside the frame, and between the front side edge part where the cone diameter is enlarged and the front peripheral edge of the frame surrounding the cone. Apart from
Connect a basket-shaped support cap to the inside of the base of the cone,
A net is attached to the front side of the support cap, the base end of the column is connected orthogonally to the net, and the tip of the column and the front peripheral edge of the frame are connected via a support arm, and the cone is attached to the base side. An edgeless speaker characterized by being supported by the damper and the center side.