JP3879020B2 - Speaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker, and particularly to a speaker that suppresses vibration transmission from the outside to a speaker unit or a speaker system.
[0002]
[Prior art]
In a conventional speaker, a speaker unit having a magnetic circuit portion made of a magnet or the like that vibrates a diaphragm is fixed to a speaker cabinet having high rigidity and weight through a high rigidity frame of the speaker unit, and the speaker cabinet is connected to the speaker unit. It was installed on the ground and used. In some cases, a block having a high rigidity and a large weight is disposed between the speaker cabinet and the ground surface to suppress vibration from being transmitted from the outside to the speaker unit.
[0003]
[Problems to be solved by the invention]
However, as described above, even if the external vibration is suppressed by rigidity and weight, the external vibration cannot be sufficiently suppressed, and the external vibration is transmitted to the speaker unit through the speaker cabinet and the frame. It was. As a result, the original sound generation operation of the speaker, that is, the original movement of the diaphragm, the voice coil, etc. is disturbed, and there is a problem that the audio signal input from the audio amplifier cannot be reproduced faithfully.
[0004]
Further, the speaker cabinet and the ground plane are in contact with each other over a wide area, which is substantially equivalent to the speaker cabinet being supported at many points with respect to the ground plane, and a plurality of external vibrations are applied to the speaker. There was also a problem that unnecessary vibrations of the speaker were made more complicated by being input from the location.
[0005]
An object of the present invention is to provide a speaker capable of suppressing an unnecessary vibration of a speaker unit or a speaker system due to vibration transmission from the outside and reproducing an input audio signal more faithfully.
[0006]
[Means for Solving the Problems]
A speaker according to the present invention includes a speaker unit including a diaphragm, a frame that fixes an outer periphery of the diaphragm, and an electromechanical converter that converts an audio signal into mechanical vibration of the diaphragm. And a support member installed on the ground surface to support the speaker unit in contact with one point.
[0007]
With the above configuration, the speaker unit is supported by the support member in a state where the speaker unit is in contact with one point of the speaker unit. Therefore, even if unnecessary vibration is applied to the support member from the ground surface, the entire speaker unit shakes rigidly. Therefore, the vibration can be absorbed. That is, even if the vibration source is outside the speaker and vibration is applied to the speaker from the vibration source, or even if vibration from the speaker is reflected by the ground surface and returned to the speaker again, vibration is applied. When the entire speaker unit shakes rigidly, the vibration can be absorbed. Therefore, each component such as the diaphragm in the speaker unit is not relatively vibrated by unnecessary vibration propagation, and the diaphragm or the like can perform original vibration according to the input audio signal. As a result, unnecessary vibration of the speaker unit or the speaker system due to vibration transmission from the outside can be suppressed, and the input audio signal can be reproduced more faithfully.
[0008]
In this specification, the term “grounding surface” means a surface serving as a mechanical ground, and setting the supporting member on the grounding surface means that the supporting member is simply placed on the grounding surface and the supporting member is in contact with the grounding surface. It means both when fixed to the ground. Further, the grounding surface of the speaker can be various such as a floor, a wall, a ceiling, a pillar, etc., and the support member can be appropriately placed, locked, suspended, etc. depending on the installation location. It is assumed that it is a support form.
[0009]
In this specification, “vibration transmission from the outside” means not only the case where the vibration source is outside the speaker and the vibration is transmitted from the vibration source to the speaker, but also the vibration from the speaker is reflected by the ground plane. This includes the case where vibration is transmitted by returning to the speaker again.
[0010]
The speaker further includes a speaker cabinet that is spaced apart from the speaker unit and covers a back surface of the speaker unit, and the support member supports the speaker unit at a point on a vertical axis that passes through the center of gravity of the speaker unit. It is preferable. In this case, the speaker unit can be supported more stably.
[0011]
Moreover, it is preferable that the said speaker unit is further equipped with the adjustment member which adjusts the gravity center position of the said speaker unit so that the said supporting member may support the said speaker unit on the vertical axis which passes along the gravity center of the said speaker unit. In this case, the contact position between the support member and the speaker unit can be easily selected.
[0012]
The speaker further includes a speaker cabinet fixed to the speaker unit and covering a back surface of the speaker unit, and the support member is on a vertical axis passing through the center of gravity of the speaker system including the speaker unit and the speaker cabinet. It is preferable to support the speaker unit at one point. In this case, the speaker system can be supported more stably.
[0013]
Moreover, it is preferable that the said speaker unit is further provided with the adjustment member which adjusts the gravity center position of the said speaker system so that the said support member may support the said speaker unit on the vertical axis which passes along the gravity center of the said speaker system. In this case, the contact position between the support member and the speaker unit can be easily selected.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a longitudinal side view schematically showing a configuration of a speaker according to a first embodiment of the present invention.
[0015]
As shown in FIG. 1, the speaker includes a speaker unit 1a, a speaker cabinet 2a, a support bar 3a, and a fixed base 4a, and a speaker system is configured by the speaker unit 1a and the speaker cabinet 2a. The speaker unit 1a includes a yoke 11, a magnet 12, a plate 13, a frame 14, a diaphragm 15, a voice coil 16, an edge 17, a damper 18, and an adjustment member 19a. Here, a support member is constituted by the support rod 3a and the fixing base 4a, and an electromechanical transducer is constituted by the yoke 11, the magnet 12, the plate 13, and the voice coil 16. In addition, the structure of a supporting member is not specifically limited to said example, A various structure is employable. Further, the electromechanical transducer is not particularly limited to the configuration using the above-described magnetic circuit or the like, and another electromechanical transducer using a piezoelectric element or the like may be used.
[0016]
The magnet 12 is fixed to the yoke 11, the plate 13 is fixed to the magnet 12, and a magnetic circuit is configured by the yoke 11, the magnet 12, and the plate 13, and a magnetic field is formed between the yoke 11 and the plate 13. The vicinity of the voice coil 16 of the diaphragm 15 is connected to the frame 14 via a damper 18, and the outer periphery of the diaphragm 15 is connected to the outer periphery of the frame 14 via an edge 17. Is supported so as to vibrate. When the voice coil 16 is disposed in the gap portion between the yoke 11 and the plate 13 and a current corresponding to the audio signal is passed through the voice coil 16, the voice coil 16 vibrates according to the current value due to the magnetic flux in the gap portion. The voice coil 16 is connected to the diaphragm 15, and the diaphragm 15 vibrates in response to the vibration of the voice coil 16, and a sound corresponding to the audio signal is reproduced.
[0017]
An adjustment member 19a for adjusting the position of the center of gravity of the speaker system is provided on the rear surface of the yoke 11, and a support hole H1a is provided in the adjustment member 19a so as to pass through the center of gravity Ca of the speaker system. Therefore, by appropriately changing the shape of the adjustment member 19a, the position of the center of gravity of the speaker system can be easily adjusted, and the contact position between the support bar 3a and the speaker unit can be easily selected. In addition, the fixing method of the yoke 11 and the adjustment member 19a can use various methods, such as welding, screw fixation, press-fit, adhesion | attachment, and is not specifically limited. Further, the adjustment member is not limited to a separate component from the yoke as described above, and the rear surface of the yoke may be enlarged to be a component integrated with the yoke, or other members in the vicinity of the electromechanical converter, for example, Alternatively, the shape of the frame may be changed, and the frame may be extended to the back side of the speaker so that the magnetic circuit portion is accommodated in the frame as it is, so as to be an integral part of the frame.
[0018]
The speaker cabinet 2a is fixed and supported by the frame 14 of the speaker unit 1a. The method for fixing the speaker cabinet 2a and the frame 14 is not particularly limited, and various methods such as screw fixing and adhesion can be used. As the material of the speaker cabinet, the materials generally used for the speaker cabinet can be used, and mahogany, rosewood (ebony), ebony (ebony), firewood, firewood, cocoon, teak, pine, spruce, etc. A weight material having a specific gravity of 0.5 or more, a lightweight material having a specific gravity of 0.3 or less, such as styrene foam, balsa, and paulownia, or a combination thereof can be used. Any of laminated wood such as a single board, a plywood, or a particle board may be used.
[0019]
One end of the support bar 3a is fixed to a fixed base 4a placed on the ground plane G. Various methods such as welding, screw fixing, press-fitting, and adhesion can be used for fixing the support bar 3a and the fixing base 4a, and any method can be used as long as the support bar 3a and the fixing base 4a can be firmly fixed. It is not limited. The material of the support bar 3a and the fixing base 4a can be various materials such as metal, plastic, and wood, and is not particularly limited. The shapes of the support bar 3a and the fixing base 4a are not particularly limited, and various shapes can be adopted. The support bar 3a and the fixing base 4a are not limited to separate ones, and they may be formed as an integral part.
[0020]
The other end of the support bar 3a is inserted into a through hole H2a provided on the lower surface of the speaker cabinet 2a while being separated from the speaker cabinet 2a, and further inserted into the support hole H1a. A concave spherical surface is formed at the bottom of the support hole H1a, and a convex spherical surface having a smaller radius of curvature than the concave spherical surface of the support hole H1a is formed at the end of the support rod 3a. A pivot bearing is configured in which one point of the convex spherical surface abuts at a position above the center of gravity Ca of the speaker system. In order to improve the wear resistance of the bearing portion, a region having at least the contact portion of the support bar 3a and the support hole H1a may be coated with a resin having a high lubricity.
[0021]
The support form of the speaker system by the support rod is not particularly limited to the pivot bearing described above, and the head-conical support member provided with a minute flat portion on the upper end surface of the conical convex portion is in contact with the flat portion. A sphere having a smaller radius of curvature than the concave spherical surface is inserted between a flat surface support using a support hole having a flat surface portion, and a support member having a concave spherical surface at the tip and a support hole having a concave spherical surface at the bottom. Various supporting forms such as a supporting ball receiver can be used. Further, the support member is not only provided with the bar-like member extending from below as described above, but also provided with the hook-like member extending from the upper part, the beam-like member extending horizontally or obliquely according to the installation form. It can be in various forms such as those provided.
[0022]
With the above configuration, the speaker system is supported in a state where the speaker system is in contact with a single point (with a very small area), so even if unnecessary vibration is applied to the support bar 3a and the fixing base 4a from the ground plane G, the entire speaker system is The vibration can be absorbed by shaking the body rigidly. Accordingly, each component such as the diaphragm 15 in the speaker system is not relatively vibrated by unnecessary vibration propagation, and the diaphragm 15 or the like can perform original vibration according to the input audio signal. . As a result, unnecessary vibration of the speaker system due to vibration transmission from the outside can be suppressed, and the input audio signal can be reproduced more faithfully. In addition, said suppression effect is so large that the contact area of one point support is small.
[0023]
Further, since the speaker system is supported at one point, the vibration mode of the speaker system is simplified, and the minimum resonance frequency in that case can be set to several Hz or less.
[0024]
Further, since the support bar 3a supports the speaker system at a point on the vertical axis passing through the center of gravity Ca of the speaker system and above the center of gravity, even if the speaker system is displaced from the original stationary position, The self-weight acts in a direction to suppress the deviation, and the speaker system can always be stopped at a stable position.
[0025]
Next, a speaker according to a second embodiment of the present invention will be described. FIG. 2 is a longitudinal side view schematically showing the configuration of the speaker according to the second embodiment of the present invention. In the speaker shown in FIG. 2, the same parts as those of the speaker shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
[0026]
The speaker shown in FIG. 2 is different from the speaker shown in FIG. 1 in that the speaker cabinet 2b is supported by a cabinet support bar 3b which is a speaker cabinet support member in a state of being separated from the speaker unit 1b. The fixing base 4b fixes the support bar 3a and the cabinet support bar 3b and is disposed on the ground surface G. Further, an adjustment member 19b for adjusting the position of the center of gravity of the speaker unit 1b is provided on the back surface of the yoke 11, and the adjustment member A support hole H1b is provided at 19b so as to pass through the center of gravity Cb of the speaker unit 1b.
[0027]
The method for fixing the speaker cabinet 2b and the cabinet support bar 3b is not particularly limited, and various methods such as screw fixing, press fitting, and adhesion can be used. Moreover, the fixing method of the support rod 3b for cabinets and the fixing stand 4b is the same as the fixing method of the support rod 3a and the fixing stand 4a of 1st embodiment. Further, the distance between the speaker cabinet 2b and the frame 14 also suppresses air leakage from the speaker cabinet 2b to the outside as much as possible. Therefore, even if the speaker unit 1b vibrates due to external vibration, the frame 14 does not contact the speaker cabinet 2b. Preferably it is as narrow as possible within the range.
[0028]
With the above configuration, since the speaker unit 1b is supported in a state where the speaker unit 1b is in contact at a single point (with a small area), even if unnecessary vibration is applied to the support bar 3a and the fixing base 4b from the ground surface G, the speaker unit When the whole 1b shakes rigidly, the vibration can be absorbed. Accordingly, each component such as the diaphragm 15 in the speaker unit 1b is not relatively vibrated due to propagation of unnecessary vibration, and the diaphragm 15 or the like can perform original vibration according to the input audio signal. it can. As a result, also in this embodiment, unnecessary vibration of the speaker unit 1b due to vibration transmission from the outside can be suppressed, and the input audio signal can be reproduced more faithfully.
[0029]
Also in this embodiment, since the speaker unit 1b is supported at one point, the vibration mode of the speaker unit is simplified, and the minimum resonance frequency in that case can be set to several Hz or less.
[0030]
Also in the present embodiment, since the support bar 3a supports the speaker unit 1b at a point on the vertical axis passing through the center of gravity Cb of the speaker unit 1b and above the center of gravity, the speaker unit 1b is in its original stationary position. Even if the speaker unit 1b is deviated from, the weight of the speaker unit 1b acts in a direction to suppress the deviation, and the speaker unit 1b can always be stationary at a stable position.
[0031]
Next, another example of the support form by the support rod will be described with reference to FIGS. FIG. 3 is a diagram showing a configuration of another first example of a support form using a support rod, and FIG. 4 is a diagram showing a configuration of another second example of a support form using a support bar. These are figures which show the structure of the other 3rd example of the support form by a support bar. 3 to 4, only the vicinity of the support rod is shown, but the other components are the same as those in the above embodiments, and the examples described below are not limited to any of the above embodiments. It is also possible to adopt the form.
[0032]
First, as shown in FIG. 3, in the first example, the elastic member 21 is provided at the bottom of the support hole of the adjustment member 19c, and the support bar 3a is connected to the adjustment member 19c (speaker unit or speaker via the elastic member 21). System). In this case, the adjustment member 19c can be stably supported by the restoring force due to the elasticity of the elastic member 21 and the frictional force between the elastic member 21 and the support rod 3a, and the elastic member 21 attenuates the vibration, and further the vibration. Transmission can be suppressed.
[0033]
Next, as shown in FIG. 4, in the second example, the elastic member 22 is provided at the bottom of the support hole of the adjustment member 19 d, and the support member 23 is further provided below the elastic member 22. The support bar 3 a abuts on the support member 23 and supports the adjustment member 19 d via the support member 23 and the elastic member 22. Also in this case, the adjustment member 19d can be stably supported by the restoring force due to the elasticity of the elastic member 22, and the vibration transmission can be suppressed by attenuating the vibration by the elastic member 22.
[0034]
Finally, as shown in FIG. 5, in the third example, an elastic member 25 is provided on the upper portion of the support bar 3c, and further, a support member 24 having a convex hemispherical surface is provided on the upper portion of the elastic member 25. The hemispherical surface of the support member 24 comes into contact with the bottom of the support hole of the adjustment member 19e, and the adjustment member 19e is supported. Also in this case, the adjustment member 19e can be stably supported by the restoring force due to the elasticity of the elastic member 25, and vibrations can be attenuated by the elastic member 25 to suppress vibration transmission.
[0035]
Note that rubber, felt, or the like can be used as the elastic member, and metal, plastic, wood, or the like can be used as the support member.
[0036]
Further, the present invention can be applied not only to high-end audio speakers but also to various speakers such as general speakers.
[0037]
【The invention's effect】
According to the present invention, since the support member is supported in a state of being in contact with one point of the speaker unit, even if unnecessary vibration is applied to the support member from the ground surface, the entire speaker unit shakes rigidly. In addition, each component such as the diaphragm in the speaker unit does not vibrate relatively due to the propagation of unnecessary vibration, and the diaphragm or the like can perform the original vibration according to the input audio signal. As a result, unnecessary vibration of the speaker unit or the speaker system due to vibration transmission from the outside can be suppressed, and the input audio signal can be reproduced more faithfully.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view schematically showing a configuration of a speaker according to a first embodiment of the present invention.
FIG. 2 is a longitudinal side view schematically showing a configuration of a speaker according to a second embodiment of the present invention.
FIG. 3 is a partial cross-sectional schematic view showing a configuration of another first example of a support form using a support rod.
FIG. 4 is a partial cross-sectional schematic view showing the configuration of another second example of the support form by the support rod.
FIG. 5 is a partial cross-sectional schematic diagram showing the configuration of another third example of the support form by the support rod.
[Explanation of symbols]
1a, 1b Speaker unit 2a, 2b Speaker cabinet 3a Support rod 3b Cabinet support rod 4a, 4b Fixing base 11 Yoke 12 Magnet 13 Plate 14 Frame 15 Diaphragm 16 Voice coil 17 Edge 18 Dampers 19a-19e Adjustment member

Claims (5)

A speaker unit comprising: a diaphragm; a frame that fixes an outer periphery of the diaphragm; and an electromechanical converter that converts an audio signal into mechanical vibration of the diaphragm;
A speaker comprising: a support member that is in contact with one point of the speaker unit to support the speaker unit and is installed on a ground surface. A speaker cabinet that is spaced apart from the speaker unit and covers a back surface of the speaker unit;
The speaker according to claim 1, wherein the support member supports the speaker unit at one point on a vertical axis passing through the center of gravity of the speaker unit. The speaker according to claim 2, wherein the speaker unit further includes an adjustment member that adjusts a position of the center of gravity of the speaker unit so that the support member supports the speaker unit on a vertical axis passing through the center of gravity of the speaker unit. A speaker cabinet fixed to the speaker unit and covering a back surface of the speaker unit;
The speaker according to claim 1, wherein the support member supports the speaker unit at one point on a vertical axis passing through a center of gravity of a speaker system including the speaker unit and the speaker cabinet. The speaker according to claim 4, wherein the speaker unit further includes an adjustment member that adjusts the position of the center of gravity of the speaker system so that the support member supports the speaker unit on a vertical axis passing through the center of gravity of the speaker system.

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