JP2000197175A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily control the characteristics of acoustic waves by providing a diaphragm for radiating acoustic waves and an equalizer connected with the diaphragm. SOLUTION: A corn-type full range speaker 1 is provided with a straight corn 2 and an equalizer 3. This equalizer 3 is constituted of a disc-shaped acoustic wave controlling member and a square pole-shaped supporting member made of acryl resin, and the disc-shaped acoustic wave controlling member is connected through adhesive with the square pole-shaped supporting member. Then, one edge part and other edge part of the square pole-shaped supporting member are adhered through adhesive with the straight corn 2, and the disc- shaped acoustic wave controlling member is supported so that a prescribed interval can be held between the disc-shaped acoustic wave controlling member and a projecting spherical face-shaped center cap 11 mounted on the straight corn 2. Therefore, when the straight corn 2 is vibrated, the equalizer 3 vibrates according to the vibration of the straight corn 2 so that any contact between the projecting spherical face-shaped center cap 11 and a disc-shaped acoustic wave controlling member 3a can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a speaker,
More specifically, the present invention relates to a loudspeaker capable of easily controlling the characteristics of sound waves, particularly effectively improving high-frequency characteristics, and preventing damage to a diaphragm.

[0002]

2. Description of the Related Art Conventionally, as speakers, for example, there are a cone speaker using a cone-shaped diaphragm, a dome speaker using a dome-shaped diaphragm, and a horn speaker. Depending on the characteristics of radiated sound waves, for example, these speakers can be used for, for example, televisions, radios, general-purpose speakers, Hi-Fi speakers, full-range speakers,
Bass speakers (sometimes called "woofers"),
A mid-range speaker (sometimes referred to as a “midrange”), a high-range speaker (sometimes referred to as a “tweeter”), a loudspeaker, or the like is selectively adopted according to the purpose.

In the loudspeaker, characteristics of a sound wave radiated from the loudspeaker, for example, output sound pressure level, reproduction frequency range, reproduction bandwidth, frequency characteristic, sound pressure frequency characteristic,
Controlling the listening room frequency characteristics, directional frequency characteristics, directional characteristics, distortion, harmonic distortion, transient characteristics, channel balance, inter-channel phase difference, amplitude distortion, phase distortion, phase characteristics, etc., to achieve the desired timbre Is desired.

In the above-mentioned speaker, for example,
A magnetic circuit that applies a magnetic flux to the voice coil by attaching a voice coil to the diaphragm can be employed, and the efficiency expressed by the ratio of the acoustic output to the electrical input in the magnetic circuit (“energy conversion efficiency”) It can be rephrased).

However, these speakers have a problem in that, for example, the characteristics of the sound waves, particularly the characteristics of the sound waves in a high frequency range (sometimes referred to as “high sound characteristics”) cannot be easily controlled. Specifically, it is difficult to extend the reproduction frequency range on the treble side (it can be paraphrased as "increase the treble limit frequency"), or reduce peaks and dips near the treble limit frequency (" Flattening peaks and dips "can be paraphrased) or it is difficult to achieve a desired tone, especially a tone excellent in high tone characteristics, by making high tone characteristics compatible with other characteristics. Problem. Among the various speakers, it is more difficult to control the characteristics of the radiated sound wave in the treble speaker than in the other speakers.For example, the structure of the cone is changed, and the edge and the damper are devised. Various attempts have been made, such as changing the structure of the center cap and adding a device to the structure of the frame. However, each method is complicated, and it has not been easy to effectively improve the characteristics of the sound wave, particularly, the high sound characteristics.

In a cone speaker, an acoustic lens or a diffuser is placed in front of the speaker, and in a dome speaker or a horn speaker, a member other than the diaphragm, for example, a frame, a horn, or a diaphragm is housed. Attempts have also been made to join the equalizer to a non-vibrating member, such as a casing, or a throat interposed between the casing and the horn. However, for example, if the interval between the diaphragm and the equalizer is made narrower in an attempt to increase the treble limit frequency, there is a problem that the diaphragm comes into contact with the equalizer and the diaphragm is damaged, and the like. In order to prevent the diaphragm from being damaged by the contact between the diaphragm and the equalizer, for example, if the interval between the diaphragm and the equalizer is made sufficiently large, the treble limit frequency decreases, The treble characteristics could not be effectively improved. Therefore, there is a demand for a loudspeaker capable of increasing the treble limit frequency without damaging the diaphragm.

[0007] The present invention relates to a loudspeaker which makes it possible to satisfy this need. An object of the present invention is to provide a speaker that can easily control the characteristics of a sound wave. Another object of the present invention is to provide a speaker capable of effectively improving high-frequency characteristics. Another object of the present invention is to provide a speaker that can improve high-frequency characteristics without damaging the diaphragm.

[0008]

A first means for solving the above-mentioned problem is to join a vibration plate which emits a sound wave and an equalizer to the vibration plate. A second means for solving the above problem is a member for supporting the equalizer in the first means, the member for regulating the propagation of the sound wave, and the member for supporting the member and the diaphragm so as to maintain a predetermined interval. Consisting of When a speaker obtained by employing these means is used, high-frequency characteristics can be improved without damaging the diaphragm.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (General Description) A loudspeaker according to the present invention includes a diaphragm for radiating sound waves and an equalizer joined to the diaphragm. -Diaphragm- As the diaphragm in the speaker of the present invention, a conventionally known diaphragm can be adopted. Specifically, for example,
Cone-shaped diaphragms such as straight cones, paracurved cones, and parabolic cones, dome-shaped diaphragms, ring-shaped diaphragms, and the like can be given. These diaphragms are supported at predetermined positions in the speaker by, for example, suspensions such as cone edges and dampers.

In the loudspeaker of the present invention, a voice coil is usually mounted on a predetermined position of the diaphragm via a bobbin, and the diaphragm is vibrated by applying a magnetic flux to the voice coil. Examples of the magnetic circuit that applies a magnetic flux include an inner magnetic circuit, an outer magnetic circuit, and the like. Specifically, for example, a magnetic circuit having a permanent magnet, a yoke, a yoke plate, and a pole piece can be used.

For example, when a cone-shaped diaphragm is used as the diaphragm, a center cap (sometimes referred to as a "dust cap") is attached to the cone-shaped diaphragm. As the center cap, for example, a convex cap, a concave cap, a flat cap, a perforated cap having a through hole in the center cap, or the like is appropriately selected and adopted.

Since the center cap vibrates in accordance with the vibration of the diaphragm, it also has a function as a diaphragm for radiating sound waves. -Equalizer- The equalizer in the present invention is joined to the diaphragm. Conventionally, the equalizer has been disposed separately from the diaphragm mainly in front of the diaphragm in order to flatten the high-frequency characteristics of the hard dome speaker, but in the speaker of the present invention,
A member that regulates the propagation of sound waves
) And a member that supports the member and the diaphragm so as to maintain a predetermined distance (hereinafter, may be simply referred to as a “support portion”). The feature is that it is directly joined. The shape of the equalizer is not particularly limited as long as the characteristics of the sound wave radiated from the speaker can be controlled.

In the loudspeaker according to the present invention, the equalizer is preferably composed of a sound wave regulating portion and a support portion. Usually, the equalizer is joined to the vibrating plate via the support portion. The support may have a function of regulating the propagation of sound waves. As the equalizer of the present invention, a sound wave regulating portion and a support portion may be integrally formed, or the sound wave regulating portion and the support portion may be combined.

In the loudspeaker according to the present invention, the sound wave restricting portion and the support portion can be formed in desired shapes, so that the characteristics of the sound wave radiated from the speaker can be easily controlled. Examples of the shape of the sound wave regulating portion include, for example, a columnar shape, an elliptical columnar shape, a columnar shape such as a polygonal columnar shape, a disk shape, an elliptical plate shape, a plate shape such as a polygonal plate shape, a dish shape, a bowl shape, a curved shape such as a morning glory shape. Examples include a plate shape, a cone shape such as a cone shape and a pyramid shape, a spherical shape, a linear shape, and a rod shape. Examples of the shape of the support portion include, for example, a triangular prism, a prism such as a quadrangular prism, a column, a triangular pipe having a triangular cross section orthogonal to the longitudinal direction, and a quadrangular cross section perpendicular to the longitudinal direction. Examples thereof include a square pipe shape such as a certain square pipe shape and a cylindrical shape.

In the present invention, for example, by reducing the total weight of the sound wave regulating portion and the supporting portion, the equalizer can be reduced in weight and, for example, a decrease in sound pressure can be prevented. Can be improved, and the characteristics of the sound wave radiated from the speaker can be controlled. Also, the volume of the reflected sound can be controlled by changing the surface area of the equalizer.

It is desirable that the equalizer and, above all, the sound wave regulating member be made of a lightweight and high-strength material. Specific examples of the material include a metal such as aluminum, a synthetic resin such as an acrylic resin, and Japanese paper. A material obtained by impregnating a paper material with a synthetic resin can be used.
Examples of the impregnating resin include a cyanoacrylate-based resin and a low-viscosity epoxy-based resin which are materials of an instant adhesive. By impregnating the Japanese paper with the resin for impregnation, it is possible to impart the strength required for the sound wave regulating member to the Japanese paper, which is a lightweight material.

The sound wave regulating section and the support section include, for example,
An acoustic lens, a diffuser and the like can be attached.

In the speaker of the present invention, since the equalizer is joined to the diaphragm, when the diaphragm is vibrated,
The equalizer can vibrate with the vibration of the diaphragm. When the equalizer vibrates along with the vibration of the diaphragm, the predetermined distance between the sound wave regulating unit and the diaphragm can be kept substantially constant, and the diaphragm comes into contact with the sound wave regulating unit and the diaphragm is damaged. That is, the conventional equalizer can be prevented. Here, to keep the predetermined interval substantially constant means to keep an interval at which the diaphragm does not contact the sound wave regulating unit. (Specific description) Hereinafter, the speaker of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a cone type full range speaker 1 according to an embodiment of the present invention includes a straight cone 2 and an equalizer 3. Straight cone 2
Is supported at a predetermined position in the full-range speaker 1 by the cone edge 4 and the damper 5. A voice coil 6 is mounted on the cone attachment 2 </ b> A of the straight cone 2. A magnetic flux is applied to the voice coil 6 by an internal magnetic circuit formed by a magnet 7, a yoke 8, a yoke plate 9, and a pole piece 10. The straight cone 2 is provided with a convex spherical center cap 11. Cone edge 4
Has one end 4A of the edge joined to the straight cone 2 and the other end 4B of the edge joined to the frame 12. The damper 5 is joined to the straight cone 2 at one end 5A of the damper, and the other end 5B of the damper is joined to the frame 12.

As shown in FIG. 2, the equalizer 3 comprises a disc-shaped sound wave regulating member 3A and a rectangular column-shaped supporting member 3B made of acrylic resin. The disc-shaped sound wave regulating member 3A and the rectangular column-shaped supporting member 3B. Are connected by an adhesive. The disc-shaped sound wave regulating member 3A is formed by impregnating a cut piece of Japanese paper into a disc shape with a cyanoacrylate resin for impregnation and curing the same to cure two pieces of the disc-shaped cured Japanese paper sheet. I have. One end 3C and the other end 3D of the quadrangular prism-shaped support member 3B are adhered to the straight cone 2 with an adhesive, and the convex spherical center cap 11 in which the disc-shaped sound wave regulating member 3A is attached to the straight cone 2 is provided. And the disc-shaped sound wave regulating member 3
A is supported.

In the full-range speaker 1, since the equalizer 3 is joined to the straight cone 2, when the straight cone 2 is vibrated, the equalizer 3 can vibrate with the vibration of the straight cone 2. When the equalizer 3 vibrates in accordance with the vibration of the straight cone 2, the predetermined interval between the disc-shaped sound wave regulating member 3 </ b> A and the convex spherical center cap 11 attached to the straight cone 2 is kept substantially constant. And a convex spherical center cap 11 attached to the straight cone 2
Does not come into contact with the disc-shaped acoustic wave regulating member 3A to damage the straight cone 2 and the convex spherical center cap 11.

In the full-range speaker 1 of the present invention, as shown in FIG. 3, a plate-like sound wave regulating portion 14A provided with a circular through-hole 13 and columnar projecting portions 14B, 14C protruding from the plate-like sound wave regulating portion 14A. A four-point support type equalizer 14 obtained by integrally molding a four-point support part having 14D and 14E can be employed. -Speaker for treble-
FIG. 4 shows a treble speaker according to an embodiment of the present invention. The speaker 15 includes a para-curved cone 16 and a high-frequency-equipped equalizer 17. A convex spherical center cap 18 is mounted on the parabolic cone 16 and is supported at a predetermined position by a cone edge (not shown) and a damper (not shown). A voice coil (not shown) is mounted on a cone tie (not shown) of the parabolic cone 16, and a magnetic flux is applied to the voice coil by an external magnetic circuit.
The cone edge is joined to the parabolic cone 16 at one end of the edge, and is joined to the frame 19 at the other end of the edge. The damper is connected to the parabolic cone 16 at one end of the damper and to the frame 19 at the other end of the damper. On the outer peripheral side surface 20 of the frame 19, a positive connection terminal 21 </ b> A to which a positive conductor (also referred to as a “+ code” or “plus code”) 21 is connected by soldering, and a negative conductor (“− code”). , And "minus side cord") 22 are connected to each other by soldering.

FIG. 5 shows the treble-equipped equalizer 17 of FIG.
Is constituted by a disc-shaped sound wave regulating member 17A and a triangular pipe-shaped support member 17B made of aluminum. The triangular pipe-shaped support member 17B divides the rectangular aluminum thin plate into four regions by three folds parallel to the vertical direction, and the front side surface 24 of the region 23 on one end side of the four divided regions and the other. Back side surface 26 of end region 25
Are bonded to each other with an adhesive to form a triangular pipe so that the cross-sectional shape orthogonal to the longitudinal direction becomes a triangle. The triangular pipe-shaped support member 17B has a laminated portion 27 in which a region 23 on one end and a region 25 on the other end are laminated, and a front surface 28 of the region 25 on the other end is disc-shaped with an adhesive. The sound wave regulating member 17A is adhered, and the outer surface 29 at one end and the outer surface 30 at the other end are bonded by an adhesive so that the disc-shaped sound wave regulating member 17A is located on the convex spherical center cap 18. It is bonded to the parabolic cone 16. In the treble speaker 15, since the treble-equipped equalizer 17 is joined to the para-curved cone 16, when the para-curved cone 16 is vibrated, the treble-equalized equalizer 17 may vibrate with the vibration of the para-curved cone 16. Yes, paracorned corn 16
Also, the center cap 18 is not damaged.

[0024]

According to the loudspeaker of the present invention, the characteristics of the sound wave can be easily controlled, especially the high-frequency characteristics can be effectively improved, and the equalizer is joined to the diaphragm, so that the equalizer can vibrate. Vibration can be accompanied by vibration of the plate, and the inconvenience of the equalizer breaking the diaphragm can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of a speaker of the present invention.

FIG. 2 is a perspective view showing an embodiment of an equalizer that can be employed in the speaker of the present invention.

FIG. 3 is a perspective view showing another embodiment of the equalizer that can be employed in the speaker of the present invention.

FIG. 4 is a schematic partial sectional view showing an embodiment of the speaker of the present invention.

FIG. 5 is a perspective view showing one embodiment of an equalizer that can be employed in the speaker of the present invention.

[Explanation of symbols]

1 ... cone speaker, 2 ... straight cone,
2A ... cone, 3 ... equalizer, 3A
..Disc-shaped sound wave regulating member, 3B: square pillar-shaped support member, 3C: one end of square pillar, 3D ... other end of square pillar, 4 ... cone edge, 4A ... One end of the edge, 4B: The other end of the edge, 5: Damper, 5A
... one end of the damper, 5B ... the other end of the damper, 6
... voice coil, 7 ... magnet, 8 ... yoke, 9 ... yoke plate, 10 ... pole piece, 11 ... convex spherical center cap, 12 ...
・ Frame, 13 ・ ・ ・ Circular through-hole, 14 ・ ・ ・ Equalizer with four-point support, 14A ・ ・ ・ Plate-shaped sound wave regulating section, 14
B, 14C, 14D, 14E ... pillar-shaped protrusion, 15.
..Speakers for treble, 16 ... para-curved cones,
Reference numeral 17 denotes a high-tone-equalizer, 17A denotes a disc-shaped sound wave regulating member, 17B denotes a triangular pipe-shaped support member, and
········································································································· 21A
... Positive connection terminal, 22 ... Negative conductor, 22A
-Negative connection terminal, 23 ... One end area, 24 ...
Front side surface, 25 ... the other end region, 26 ... Back side surface,
27 ... laminated part, ..., 28 ... front side surface, ...
.., 29... One end side surface, 30.

Claims (2)

[Claims] 1. A loudspeaker comprising: a diaphragm that emits sound waves; and an equalizer joined to the diaphragm. 2. The loudspeaker according to claim 1, wherein said equalizer comprises a member for regulating propagation of said sound wave and a member for supporting said member and said diaphragm so as to maintain a predetermined distance.