JPH11146472A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker with which the transmission of vibrations between a speaker cabinet and a speaker unit is suppressed, noises generated from the speaker cabinet can be reduced, the sound quality of the speaker can be improved and sounds can be reproduced much closer to original sounds. SOLUTION: A yoke 11a of a speaker unit 1a is directly supported by a supporting rod 3, and the vibrations of electric/mechanic converter with the vibrations of a diaphragm 15 are suppressed. Besides, a speaker cabinet 2a is bonded through a vibration-proofing film 4 to a frame 14a, and the vibrations are attenuated by the vibration-proofing film 4 and transmitted to the speaker cabinet 2a. As a result, the unwanted vibrations from the electromechanical converter of the speaker unit 1a are suppressed from being directly transmitted to the front face of the speaker cabinet 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a speaker,
In particular, the present invention relates to a speaker that suppresses vibration transmission between a speaker unit and a speaker cabinet.

[0002]

2. Description of the Related Art In a conventional loudspeaker, a loudspeaker unit is generally fixed to a loudspeaker cabinet via a frame of the loudspeaker unit, and the loudspeaker cabinet is installed and used on a ground plane. However, when the speaker unit emits sound, the magnetic circuit portion made of a magnet or the like that vibrates the diaphragm is suspended in a state where only one side is suspended by the frame, so that it receives the reaction of the coil connected to the diaphragm. The magnetic circuit vibrates. This vibration is transmitted to the speaker cabinet via the frame, and noise is generated from the speaker cabinet, thereby deteriorating the sound quality of the speaker.

In order to solve such a problem, for example, in a loudspeaker disclosed in Japanese Patent Application Laid-Open No. 7-30990, a loudspeaker unit is sandwiched from a flange side and a magnetic circuit side and pressed to be fixed to the front of a speaker cabinet. In addition, vibration of the speaker cabinet is prevented.

[0004]

However, in the method of fixing the speaker unit as described above, the magnetic circuit cannot be completely fixed, and the vibration is transmitted to the front of the speaker cabinet through the frame, and the front of the speaker cabinet is not fixed. The noise caused by the vibration of the
There has been a problem that the vibration of the speaker cabinet itself becomes noise and harms the viewing environment.

The vibration transmitted to the speaker cabinet is transmitted again to the speaker unit via the frame, causing unnecessary vibration in the entire speaker unit.
As a result, the transmitted vibration is further superimposed on the original vibration of the diaphragm, further deteriorating the sound quality of the speaker.

Further, when high-fidelity reproduction is performed, such mechanical vibration is transmitted to other audio devices such as an audio reproducing device and an audio amplifier, and convolved with electric signals of the respective devices. There is also a problem that the reproduced sound is deteriorated.

An object of the present invention is to suppress the transmission of vibration between a speaker cabinet and a speaker unit, reduce noise generated from the speaker cabinet, improve the sound quality of the speaker, and realize a reproduced sound closer to the original sound. To provide a loudspeaker capable of performing such operations.

[0008]

A speaker according to the present invention comprises a speaker unit having a diaphragm, an electromechanical converter for converting an audio signal into a mechanical vibration of the diaphragm, and a back surface of the speaker unit. A speaker cabinet to be covered, a support member having one end fixed to the electromechanical transducer to support the speaker unit, and a second end fixed to the speaker cabinet; and a support member disposed between the speaker unit and the speaker cabinet. , A vibration isolating member for preventing transmission of vibration between the speaker unit and the speaker cabinet.

According to the above configuration, since the electromechanical transducer of the speaker unit is directly supported by the support member, unnecessary vibration of the electromechanical transducer caused by the vibration of the diaphragm is suppressed, and the speaker cabinet is prevented. Is connected to the speaker unit via the vibration isolating member, so even if unnecessary vibration occurs, the vibration is attenuated by the vibration isolating member and transmitted to the speaker cabinet. Further, even if vibration is transmitted from the speaker unit to the speaker cabinet, since the speaker unit is directly supported by the support member and connected to the speaker unit via the vibration isolating member, the vibration is transmitted from the speaker cabinet to the speaker unit. Vibration can be suppressed. Therefore, vibration transmission between the speaker cabinet and the speaker unit can be suppressed, noise generated from the speaker cabinet can be reduced, the sound quality of the speaker can be improved, and reproduced sound closer to the original sound can be realized.

[0010] Further, the vibration isolating member is an edge provided on an outer peripheral edge of the diaphragm to support the diaphragm so as to vibrate, and the outer peripheral edge of the edge is used for a speaker unit of the speaker cabinet. Preferably, it is directly fixed to the mounting hole. In this case, the edge used to support the diaphragm can be used as an anti-vibration member between the speaker cabinet and the speaker unit, and a frame is not required from the speaker unit, and the number of parts can be reduced.

The speaker unit is provided on an outer peripheral edge of the diaphragm, and an edge for supporting the diaphragm so as to vibrate in one direction, and an outer peripheral edge of the edge are fixed, and And a frame supporting the vibration plate, and the vibration isolating member is preferably disposed between the frame and a speaker unit mounting hole of the speaker cabinet. In this case, the vibration of the speaker cabinet can be suppressed by using the general speaker unit as it is.

Further, it is preferable that the vibration isolating member prevents air from flowing out of the speaker cabinet. In this case, it is possible to realize a reproduced sound closer to the original sound without air leaking from the speaker cabinet.

Preferably, the support member supports the speaker unit on an axis passing through the center of gravity of the speaker unit. In this case, the whole speaker can be supported more stably.

Preferably, the speaker unit further includes an adjusting member for adjusting the position of the center of gravity of the speaker unit so that the support member supports the center of gravity of the speaker unit. In this case, it is easy to select a joint position between the support member and the electromechanical converter.

Further, it is preferable that the speaker cabinet is made of at least one of polystyrene, balsa, and paulownia. In this case, the weight of the speaker cabinet can be reduced.

It is preferable that a portion joined to another member of the speaker cabinet is made of a heavy material, and a portion not joined to another member of the speaker cabinet is made of a lightweight material. In this case, the weight of the speaker cabinet can be reduced while securing the strength of the joint.

Preferably, the specific gravity of the heavy material is 0.5 or more, and the specific gravity of the lightweight material is 0.3 or less.

Further, the weight material includes at least one of mahogany, rosewood (rosewood), ebony (ebony), oak, oak, maple, teak, pine, and spruce. It is preferable to include at least one of balsa and paulownia. In addition, the form of the weight material may be any of a laminated wood such as a veneer, a plywood, or a particle board made of the above-described materials.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a vertical sectional side view schematically showing the configuration of the speaker according to the first embodiment of the present invention.

As shown in FIG. 1, the speaker comprises a speaker unit 1a, a speaker cabinet 2a, a support rod 3,
A vibration isolation film 4 is provided. The speaker unit 1a includes a yoke 1
1a, magnet 12a, plate 13a, frame 1
4a, a diaphragm 15, a voice coil 16, an edge 17, and a damper 18. Here, a support member is constituted by the support rod 3, and an electromechanical converter is constituted by the yoke 11a, the magnet 12a, the plate 13, and the voice coil 16. The configuration of the support member is not particularly limited to the above example, and various configurations can be adopted. Further, the electromechanical converter is not particularly limited to the configuration using the magnetic circuit or the like, and another electromechanical converter using a piezoelectric element or the like may be used.

The magnet 12a is fixed to the yoke 11a, the plate 13a is fixed to the magnet 12a, and a magnetic circuit is formed by the yoke 11a, the magnet 12a, and the plate 13a.
and a magnetic field is formed between the two. A portion of the diaphragm 15 near the voice coil 16 is connected to the frame 14 a via a damper 18.
And the outer periphery of the diaphragm 15 is connected to the outer periphery of the frame 14a via the edge 17, and the diaphragm 15 is movably supported in only one direction by these supporting methods. A voice coil 16 is arranged in a gap between the yoke 11a and the plate 13a. When a current corresponding to an audio signal is applied to the voice coil 16, the voice coil 16 vibrates according to the current value due to the magnetic flux of the gap.
The voice coil 16 is connected to the diaphragm 15, and the diaphragm 15 vibrates according to the vibration of the voice coil 16, and a sound corresponding to an audio signal is reproduced.

The yoke 11 of the speaker unit 1a
a, a magnet 12a, a plate 13a, and a yoke 11a of an electromechanical transducer composed of a voice coil 16
Are supported by being joined to the support rod 3, and the support rod 3 is fixed to the bottom surface of the speaker cabinet 2a. The support bar 3 is joined to the yoke 11a on a central axis passing through the center of gravity of the speaker unit 1a.

As a method of joining the yoke 11a to the support rod 3 and joining the support rod 3 to the bottom surface of the speaker cabinet 2a, various methods such as welding, screw fixing, press fitting, and adhesion can be used. The method is not particularly limited as long as the method and the support rod 3 can be firmly joined. Various materials such as metal, plastic, and wood can be used as the material of the support rod 3a, and the material is not particularly limited as long as the yoke 11a, that is, the electromechanical converter can be firmly supported. The shape of the support bar 3 is not particularly limited, and various shapes can be adopted. Further, the portion where the support bar 3 is joined to the speaker cabinet 2a is not particularly limited to the bottom of the speaker cabinet 2a as in the present embodiment,
It may be joined to another surface such as the back surface or the top surface of the speaker cabinet.

The speaker cabinet 2a is joined to a frame 14a of the speaker unit 1a via a vibration isolating film 4 as a vibration isolating member. As a method of joining the speaker cabinet 2a and the vibration isolating film 4 and a method of joining the frame 14a and the vibration isolating film 4, various methods such as screw fixing and adhesion can be used. The method is not particularly limited as long as it can be joined to such an extent that the vibration isolating film 4 can be fixed to the substrate. As the anti-vibration film 4, anti-vibration rubber, felt, cotton, or the like can be used, and for example, sorbosein (a sales agency, Sanshin Kogyo Co., Ltd.) or the like can be used. In addition, when the vibration isolating rubber is used, it is possible to completely prevent the air leakage from the speaker cabinet 2a to the outside through the vibration isolating film 4, and even when the felt and the cotton are used, the air leakage is reduced to some extent. Can be prevented. As the material of the speaker cabinet 2a, various materials generally used for a speaker cabinet can be used, and it is not particularly limited. However, in order to reduce the weight of the speaker cabinet, styrene foam, balsa, paulownia, or a combination thereof is used. May be used.

With the above configuration, the speaker unit 1a
Since the yoke 11a is directly supported by the support rod 3, the vibration of the electromechanical transducer accompanying the vibration of the diaphragm 15 can be suppressed. Also, speaker cabinet 2
Since a is joined to the frame 14a via the vibration isolating film 4, even if unnecessary vibration occurs, the vibration is attenuated by the vibration isolating film 4 and transmitted to the speaker cabinet 2a. Further, even if vibration is transmitted from the speaker unit 1a to the speaker cabinet 2a, the speaker unit 1
a is directly supported by the support rod 3 and
Is connected to the speaker unit 1a through
Vibration transmitted from the speaker cabinet 2a to the speaker unit 1a can be suppressed. As a result, vibration transmission between the speaker cabinet 2a and the speaker unit 1a can be suppressed, noise generated from the speaker cabinet 2a can be reduced, the sound quality of the speaker can be improved, and a reproduced sound closer to the original sound can be realized. it can.

Next, a speaker according to a second embodiment of the present invention will be described. FIG. 2 is a vertical sectional side view schematically showing a configuration of the speaker according to the second embodiment of the present invention.
The same portions of the speaker shown in FIG. 2 and the speaker shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

The difference between the speaker shown in FIG. 2 and the speaker shown in FIG. 1 is that the bottom surface 24b of the speaker cabinet 2b, which is the joint surface with other members, is made of a heavy material, and the other surfaces 21a to 23a (shown in FIG. (Including both sides that are not done)
Is made of lightweight material. Here, the specific gravity of the heavy material is 0.5 or more, and the specific gravity of the light material is 0.3.
The following are preferable, and as a weight material, mahogany, rosewood (rosewood), ebony (ebony), oak,
Natural wood veneers such as oak, maple, teak, pine, spruce, laminated wood such as plywood, or particle board can be used. Lightweight materials include styrene foam, balsa,
Paulownia or a combination of these can be used.

According to the above configuration, the same effects as those of the first embodiment can be obtained in the second embodiment, and only the bottom surface 24b to be joined to other members of the speaker cabinet 2b is a heavy material. , And the other parts are made of a lightweight material, so that the speaker cabinet can be reduced in weight while securing the strength of the joint.

Next, a speaker according to a third embodiment of the present invention will be described. FIG. 3 is a vertical sectional side view schematically showing the configuration of the speaker according to the third embodiment of the present invention.
The same portions of the speaker shown in FIG. 3 and the speaker shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

The difference between the speaker shown in FIG. 3 and the speaker shown in FIG. 1 is that the central portion 25b of the bottom surface of the speaker cabinet 2c, which is a joint portion with other members, is made of a heavy material, and the other portions 21a, 21a, 22a, 23a and 24a (including both side surfaces not shown) are made of lightweight material. The weight material and the lightweight material are the same as in the second embodiment.

With the above configuration, the same effects as those of the first embodiment can be obtained in the third embodiment, and only the central portion 25b of the bottom surface joined to other members of the speaker cabinet 2c can be obtained. Is composed of heavy materials,
Since the other parts are made of a lightweight material, the weight of the speaker cabinet can be further reduced while securing the strength of the joint. In the second and third embodiments, the case where the support member is joined to the bottom surface of the speaker cabinet is described. However, when the support member is joined to the back surface or the top surface of the speaker cabinet, the back surface or the top surface is used. Or the like may be made of a heavy material, or only the vicinity of a portion joined to a support member such as a back surface or an upper surface may be made of a heavy material.

Next, a speaker according to a fourth embodiment of the present invention will be described. FIG. 4 is a vertical sectional side view schematically showing a configuration of the speaker according to the fourth embodiment of the present invention.
The same portions of the speaker shown in FIG. 4 and the speaker shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

The difference between the speaker shown in FIG. 4 and the speaker shown in FIG. 1 is that the outer peripheral edge of the edge 17 provided on the outer peripheral edge of the diaphragm 15 is directly inserted into the speaker unit mounting hole of the speaker cabinet 2d. It is fixed, and the edge 17 is used as a vibration isolating member, and the outer peripheral edge of the damper 18 is fixed and supported on a plate 13b provided with a projection for supporting the damper.

As the edge 17, the one used in a normal speaker unit can be used as it is.
In particular, when it is desired to enhance the vibration-proofing properties, a vibration-proof material such as a vibration-proof rubber may be used. The joining method between the speaker cabinet 2d and the edge 17 can be various methods such as screw fixing and bonding, and is not particularly limited as long as the joining method is such that the diaphragm 15 can be movably fixed to the speaker cabinet 2d. Not done. The damper 18 is supported not by the plate 13b but by the plate 1 shown in FIG.
A separate damper support member may be fixed to and supported on 3a.

With the above-described configuration, the same effects as those of the first embodiment can be obtained in the fourth embodiment, and the edge 17 used to support the diaphragm 15 can be replaced by the speaker cabinet 2d and the speaker unit 1b. And a frame from the speaker unit 1b is not required, and the number of parts can be reduced.

Next, an adjusting member for adjusting the position of the center of gravity so that the supporting member supports the center of gravity of the speaker unit will be described. FIG. 5 is a cross-sectional view of the speaker unit for explaining an example of the adjustment member.

As shown in FIG. 5, a yoke 11b having an enlarged rear end portion is used as an adjusting member so that the center of gravity C of the speaker unit is located at the front end portion of the concave portion H1 into which the support rod as the support member is inserted. Used. Therefore, by changing the shape of the yoke in this way, the position of the center of gravity of the speaker unit can be easily adjusted, and the selection of the joining position between the support bar and the yoke becomes easy.

Various methods such as welding, screw fixing, press-fitting, and bonding can be used for joining the support rod and the yoke. In the case of screw fixing, the male thread portion is directly attached to the support rod.
A female screw portion may be provided directly in the concave portion H1 of the yoke 11b. Also in the case of the speaker unit 1b without a frame shown in FIG. 4, the position of the center of gravity can be adjusted by changing the shape of the yoke in the same manner as described above, and the same applies to the following examples.

Next, another example of the adjusting member will be described. FIG. 6 is a cross-sectional view of the speaker unit for explaining another example of the adjustment member.

As shown in FIG. 6, a yoke 11c having a convex portion T1 and an enlarged rear end is used as an adjusting member so that the center of gravity C of the speaker unit is located at the center. Also in this case, similarly to the above, the position of the center of gravity of the speaker unit can be easily adjusted, and the joining position between the support bar and the yoke can be easily selected. The method of joining the support rod and the yoke is the same as above, and in the case of screw fixing,
A female screw portion may be provided directly on the support rod, and a male screw portion may be provided directly on the convex portion T1 of the yoke 11c.

Next, still another example of the adjusting member will be described. FIG. 7 is a sectional view of a speaker unit for explaining still another example of the adjustment member.

As shown in FIG. 7, a frame 14b having a concave portion H2 and enlarged to cover the magnetic circuit portion is used as an adjusting member so that the center of gravity C of the speaker unit is located at the center. Note that the magnet is changed to a small-diameter magnet 12b so that the magnetic circuit portion can be accommodated in the frame 14b as it is. Also in this case, similarly to the above, the position of the center of gravity of the speaker unit can be easily adjusted, and the joining position between the support bar and the yoke can be easily selected.
The method of joining the support rod and the frame is the same as described above. In the case of screw fixing, the support rod may be directly provided with a male thread portion, and the frame 14b may be directly provided with a female thread portion in the recess H2.

The adjusting member is not particularly limited to the one integrated with other parts as described above, but may be formed by another part. Further, in each of the above embodiments, the yoke and the support bar are joined, but as shown in FIG. 7, another member near the electromechanical converter may be joined to the support bar.

The above embodiments can be arbitrarily combined with each other, and in this case, the same effects can be obtained. The present invention is applicable not only to high-end audio speakers, but also to general-purpose speakers and vehicle-mounted speakers. The present invention can be applied to various speakers such as speakers.

[0045]

According to the present invention, since the electromechanical transducer of the speaker unit is directly supported by the supporting member, unnecessary vibration of the electromechanical transducer accompanying vibration of the diaphragm is suppressed and Since the speaker cabinet is connected to the speaker unit via the vibration isolating member, even if unnecessary vibration occurs, the vibration is attenuated by the vibration isolating member and transmitted to the speaker cabinet. Further, even if vibration is transmitted from the speaker unit to the speaker cabinet, since the speaker unit is directly supported by the support member and connected to the speaker unit via the vibration isolating member, the vibration is transmitted from the speaker cabinet to the speaker unit. Vibration can be suppressed. Therefore, the independence of the speaker unit with respect to the speaker cabinet can be increased, vibration transmission between the speaker cabinet and the speaker unit can be suppressed, noise generated from the speaker cabinet can be reduced, and the sound quality of the speaker can be improved. A reproduced sound closer to the original sound can be realized.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view schematically showing a configuration of a speaker according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional side view schematically showing a configuration of a speaker according to a second embodiment of the present invention.

FIG. 3 is a vertical sectional side view schematically showing a configuration of a speaker according to a third embodiment of the present invention.

FIG. 4 is a vertical sectional side view schematically showing a configuration of a speaker according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view of a speaker unit for explaining an example of an adjustment member.

FIG. 6 is a cross-sectional view of a speaker unit for explaining another example of the adjustment member.

FIG. 7 is a sectional view of a speaker unit for explaining still another example of the adjustment member.

[Explanation of symbols]

 1a-1b Speaker Unit 2a-2d Speaker Cabinet 3 Support Rod 4 Anti-Vibration Membrane 11a-11c Yoke 12 Magnet 13a-13c Plate 14a-14b Frame 15 Diaphragm 16 Voice Coil 17 Edge 18 Damper

Claims (10)

[Claims] 1. A speaker unit comprising: a diaphragm; an electromechanical converter for converting an audio signal into mechanical vibration of the diaphragm; a speaker cabinet covering a back surface of the speaker unit; A support member fixed to the converter and supporting the speaker unit, the other end of which is fixed to the speaker cabinet; a support member disposed between the speaker unit and the speaker cabinet; A vibration isolating member for preventing transmission of vibration between the speakers. 2. The vibration-damping member is an edge provided on an outer peripheral edge of the diaphragm and supporting the diaphragm so that the diaphragm can vibrate. The outer peripheral edge of the edge is for a speaker unit of the speaker cabinet. The speaker according to claim 1, wherein the speaker is directly fixed to the mounting hole. 3. The speaker unit is provided on an outer peripheral edge of the diaphragm, and an edge that supports the diaphragm so as to vibrate in one direction, and an outer peripheral edge of the edge is fixed, and The speaker according to claim 1, further comprising: a frame that supports the diaphragm by using a vibration unit, wherein the vibration isolation member is disposed between the frame and a speaker unit mounting hole of the speaker cabinet. 4. The speaker according to claim 1, wherein the vibration isolation member prevents air from flowing out of the speaker cabinet. 5. The speaker according to claim 1, wherein the support member supports the speaker unit on an axis passing through a center of gravity of the speaker unit. 6. The speaker according to claim 5, wherein the speaker unit further includes an adjusting member for adjusting a position of a center of gravity of the speaker unit so that the support member supports a center of gravity of the speaker unit. 7. The speaker cabinet according to claim 1, wherein the speaker cabinet is made of at least one of polystyrene, balsa, and paulownia.
A speaker according to any one of claims 1 to 6. 8. The speaker cabinet according to claim 1, wherein a portion joined to another member of the speaker cabinet is made of a heavy material, and a portion not joined to another member of the speaker cabinet is made of a light material. A speaker according to any of the above. 9. The speaker according to claim 8, wherein the specific gravity of the heavy material is 0.5 or more, and the specific gravity of the lightweight material is 0.3 or less. 10. The weight member includes at least one of mahogany, rosewood, ebony, oak, oak, maple, teak, pine, and spruce, and the lightweight member includes styrene foam, balsa, and paulownia. 10. The speaker according to claim 9, including at least one.