JP3386980B2 - Vibration reduction device and vibration reduction unit for audio equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to audio equipment,
In particular, it is provided on the bottom surface of the bottom plate of the speaker box of the loudspeaker, and by minimizing the vibration generated by the speaker box when the loudspeaker is operating, the vibration is transmitted to the floor where the speaker box is placed. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device and a vibration damping unit for audio equipment that are used to suppress the occurrence of resonance phenomena.

[0002]

2. Description of the Related Art A loudspeaker box itself resonates when a loudspeaker is operating. Therefore, if the vibration is transmitted to the floor on which the loudspeaker is placed, the floor will also cause a resonance phenomenon, resulting in low resonance. Not only does it resonate like a frequency sound, but it also changes the loudspeaker sound itself.

Conventionally, as a vibration suppressing means for suppressing the occurrence of a resonance phenomenon due to the vibration being transmitted to the floor on which a speaker box is placed, for example, a conical body 80 and a supporting disk 90 as shown in FIG. Is used.
The cone 80 has its large-diameter end face abutted against the lower face of the bottom plate of a loudspeaker speaker box (not shown), for example, and its sharp tip is formed at the center of a support disc 90 placed on the floor or the like. It is inserted into the support hole 91 having an inverted conical shape and is used by being arranged on the lower surface of the speaker box. In order to stably support the speaker box, it is common to use at least three sets or more of the conical body 80 and the support disk 90 in one speaker box.

In the vibration suppressing means consisting of the cone 80 and the supporting disk 90, among the vibration components generated by the speaker box when the loudspeaker is operating,
In particular, since it is impossible to completely block the vibration in the vertical direction, the vertical component of the vibration concentrates on the tip of the cone 80,
Further, it is transmitted from its tip to the floor or the like via the support disk 90. Therefore, there is a drawback that the problem of causing resonance of the floor or the like cannot be completely solved, and there is room for improvement.

[0005]

In view of the above-mentioned drawbacks of the prior art, the present invention provides a horizontal component of the vibration generated by the speaker box when the acoustic equipment, for example, the loudspeaker is operating. It is a first object of the present invention to provide a vibration damping device for audio equipment, which can almost completely block the transmission of vibrations to the floor, shelves, etc. by completely eliminating the vertical component.

A second object of the present invention is to provide a unit that can be used as a vibration damping unit in a vibration damping device for audio equipment.

A third object of the present invention is to provide a loudspeaker box using the vibration damping unit for audio equipment according to the present invention.

[Means for Solving the Problems]

[0008]

In order to achieve the above-mentioned first object, in a vibration damping device for audio equipment according to the first invention of the present application, an upper plate, a lower plate, and an upper plate and a lower plate are provided. It is composed of at least three or more balls interposed therebetween.
On the lower surface of the upper plate, there are provided supported portions extending substantially along the circumferential direction at least at three or more locations on the same circumference and dividing the circumference into a plurality of substantially uniform arcs. Then, on the upper surface of the lower plate, support portions are provided at least at three or more locations corresponding to the supported portion so as to face the supported portion. Each of the balls is rotatably and slidably interposed between the supported part and the supporting part, and is in point contact with two short lines that are substantially parallel and spaced apart from each other. It is in contact with the support, and these two short
Lines are formed on the lower surface of the upper plate and / or the upper surface of the lower plate.
Edge of the recessed groove and / or the lower surface of the upper plate and / or
Defined by the top of the protruding claw protruding from the upper surface of the lower plate
There is.

When the vibration damping device for audio equipment according to the first aspect of the present invention is placed on the lower surface of a loudspeaker and used, the upper plate and the lower plate are on substantially the same circumference, and the circumference is about the same. Since at least three balls are rotatably and slidably interposed between the supporting portion and the supported portion at least at three or more locations that are divided into a plurality of substantially uniform arcs, the loudspeaker operates. When the horizontal and vertical components of the vibration generated by the speaker box are transmitted to the upper plate when the speaker box is in motion, the upper plate is vibrated in the horizontal or vertical direction due to the horizontal and vertical components of the vibration. The vibration component is absorbed by the rotation or sliding of three or more balls, and the vibration component is not further transmitted to the lower plate.
It almost completely blocks the transmission of vibrations to shelves, and reliably prevents the resonance phenomenon of floors and shelves.

Further, in the vibration damping device for audio equipment according to the second invention of the present application, the vibration damping device for audio equipment according to the first invention,
The upper plate and the lower plate may be separably connected to the connecting means. According to the structure of the second invention, in addition to having the advantage of the first invention, the upper plate and the lower plate are separably connected by the connecting means, so that the upper plate, the balls, and the lower plate are not disjointed. It becomes easier to use.

Further, in the vibration damping device for audio equipment according to the third invention of the present application, the upper plate can be the bottom plate of the speaker box in the vibration damping device for audio equipment according to the first and second inventions. In the configuration of the third invention, in addition to the advantages of the first and second inventions, the number of parts can be further reduced, so that the cost is further improved.

In order to achieve the above-mentioned second object of the present invention, the vibration damping unit for audio equipment according to the fourth invention of the present application comprises:
An upper housing having one end open and the other end sealed, and a supported portion provided on the inner surface of the top plate of the sealing end; and one end open and the other end sealed and It includes a lower housing having a support portion provided on the inner surface of the bottom plate, and a ball rotatably and slidably interposed between the support portion and the supported portion. The upper housing and the lower housing are integrally connected to each other so that the two inner surfaces of the upper housing and the lower housing can move relative to each other in a direction of approaching and separating from each other, and the ball simultaneously comes into point contact with two short lines that are substantially parallel and separated from each other. in a state of being in contact with the supported portion and / or the support part, the short lines of the two, the
Inner surface of top plate of sealed end of upper housing and / or lower how
Edge of concave groove formed on the inner surface of the bottom plate of the sealing end of the ging
And / or inside the top plate of the sealing end of said upper housing
Surface and / or from the inner surface of the bottom plate of the sealing end of the lower housing
It is defined by the top of the protruding claw.

When at least three vibration damping units are arranged on the lower surface of the loudspeaker and used, the horizontal and vertical components of the vibration generated by the speaker box when the loudspeaker is operating are When transmitted to the top plate of the upper housing, the top plate is vibrated in the horizontal or vertical direction by the horizontal component and the vertical component, but the top plate of the upper housing and the bottom plate of the lower housing are rotated and slid. The vibration component is absorbed by the rotation or sliding of three or more balls freely interposed,
The vibration component is not further transmitted to the floor, etc., and as with the first invention of the previous operation, the transmission of vibration to the floor, shelves, etc. is almost completely blocked, and the resonance phenomenon of the floor, shelves, etc. is ensured. To prevent.

Further, in order to achieve the third object of the present invention, the present invention can provide a vibration damping unit for audio equipment on the lower surface of the bottom plate of the loudspeaker box.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[0016]

[Embodiment 1] First, a vibration damping device for audio equipment according to a first embodiment of the present invention will be described with reference to FIGS. First
Basically, as shown in FIGS. 1 and 2, the vibration damping device 1 for audio equipment in the embodiment interposes between an upper plate 10, a lower plate 20, and the upper plate 10 and the lower plate 20. And three balls 30 arranged so as to The upper plate 10 is made of a material having an appropriate rigidity, for example, a metal material, a hard plastic, or the like, and is formed into a disk shape. The upper surface of the upper plate 10 has substantially the same circumference on its lower surface. Shallow recesses 11 extending substantially along the circumferential direction are formed at three locations divided into arcs, and a groove 12 extending substantially along the circumferential direction is formed at the center of each shallow recess 11. Has been done.

The lower plate 20 is made of the same material as the upper plate 10 and formed in exactly the same shape. That is, the lower plate 20 has a shallow concave portion 21 and a concave groove 22, respectively, on the surface (upper surface) on the side facing the upper plate 10 corresponding to the shallow concave portions 11 and the concave grooves 12 of the upper plate 10. Has been formed.

The ball 30 is made of a material having a high hardness, such as a sintered body of glass or ceramics, and is formed into a spherical shape having a high roundness. The outer diameter of the ball 30 is set to be smaller than the width of the shallow recesses 11 and 21 formed on the two opposing surfaces of the upper plate 10 and the lower plate 20 and larger than the width of the recessed grooves 12 and 22.

Next, a method of using the vibration damping device 1 for audio equipment of the first embodiment will be described.

When the vibration damping device 1 for audio equipment of the first embodiment is used, as shown in FIG. 2, it is formed along the central circumference of three shallow recesses 21 formed on the upper surface of the lower plate 20. One ball 30 is placed on each of the recessed grooves 22 thus formed. Since the outer diameter of the ball 30 is larger than the groove width of the groove 22, the ball 30 is placed on the edges 211, 212 of the two facing side walls of the groove 22 and these edges 211, 212.
It is rotatably and slidably supported along. In this state, further three shallow recesses 11 formed on the lower surface of the upper plate 10
The grooves 12 formed along the center circumference of the
The upper plate 10 is arranged so as to be placed on top of. Ball 30
Since the outer diameter of the groove is larger than the groove width of the concave groove 12 of the upper plate 10, the upper plate 10 has two opposite side wall end edges 111 and 112 of the concave groove 12 that slide along the upper spherical surface of the ball 30. It is movably supported by the ball 30. In this state, the contact between the ball 30 and the concave grooves 12 and 22 is as shown in FIG.
When viewed from the cross-sectional view shown in FIG. 2, the edges 111 and 112 of both side wall portions of the groove 12 and the edge 211 of both side walls of the groove 22 are
Since there are only four points at 212, the contact resistance between the ball 30 and the grooves 12, 22 is very small. That is, the ball 30 is mounted so as to be rotatable and slidably interposed between the balls 30 and the concave grooves 12 and 22.

In this state, when the speaker box 40 shown by the dotted line is arranged so as to be placed on the upper surface of the upper plate 10, for example, when a loudspeaker (not shown) is operating, the vibration generated by the speaker box 40 is generated. When the horizontal component and the vertical component are transmitted to the upper plate 10 and the upper component 10 is vibrated in the horizontal direction or the vertical direction by the horizontal component and the vertical component, rotation / sliding between the concave grooves 12 and 22 is performed. When the three movably interposed balls 30 receive the vibration of the upper plate 10, the balls 30 themselves rotate or slide. As a result, the vibration component of the upper plate 10 is absorbed by the rotation or sliding of the hole 30, and the vibration component is not further transmitted to the lower plate 10, and the vibration is almost transmitted to the floor, the shelf, etc. By completely shutting off, it is possible to reliably prevent resonance phenomena such as floors and shelves.

[0022]

[Embodiment 2] With reference to Fig. 3, a vibration damping device 1'for audio equipment according to a second embodiment of the present invention will be described. Although the basic configuration of the vibration damping device for an audio equipment 1'of the second embodiment is the same as that of the first embodiment described above, in the first embodiment, the upper plate 10 and
Since the three balls 30 and the lower plate 20 are separated from each other, the balls 30 may be lost during installation. The connection means 50 for connecting is further provided.

The connecting means 50 is, for example, as shown in FIG. 3, hook tapes 51, 52 which are hook-and-loop fasteners attached to several places on the outer peripheral walls of the upper plate 10 and the lower plate 20, respectively.
And a loop tape 54 for integrally connecting the upper plate 10 and the lower plate 20 by adhering to the hook tapes 51 and 52.

Upper plate 10, lower plate 20, and three balls 30
In the arrangement state shown in FIG. 2, the upper plate 10 and the lower plate 20 can be integrally connected by the connecting means 50. Therefore, by installing the vibration damping device 1'for acoustic equipment in a state where the upper plate 10 and the lower plate 20 are integrally connected, it is possible to avoid the ball 30 from being lost between the upper plate 10 and the lower plate 20. it can. In addition, after temporarily installing the vibration damping device for an audio equipment 1 ′ on the lower surface of the speaker box 40, the loop tape 54 is attached to the hook tape 51,
It may be removed from 52.

The connecting means 50 uses a surface fastener in the second embodiment, but the connecting means 50 is not limited to this, and the upper plate 10 and the lower plate 20 can be connected in a separable manner. If available, a connecting means such as a double-sided tape may be used.

In the first and second embodiments described above, the upper plate 10 may be directly formed by the bottom plate of the speaker box 40. In this way, the first and second
In addition to the same effect as that of the embodiment, the number of parts can be further reduced, so that the cost is further improved.

Further, in the above-mentioned first and second embodiments, the means for supporting the balls 30 are formed in the three concave grooves 22 formed in the upper surface of the lower plate 20 and the lower surface of the upper plate 10. Although there are three concave grooves 12, the concave grooves 12 and 22 are not limited to such a shape.
Instead of two, as shown in FIG. 4, two substantially parallel projecting claws 14 projecting downward from the lower surface of the upper plate 10 to form a concave groove therebetween, and projecting upward from the upper surface of the lower plate 20. The same function and effect can be obtained even by using two substantially parallel projecting claws 24 that form a concave groove therebetween.

When the ball 30 is mounted on the concave groove 22 formed on the upper surface of the lower plate 20 or the two substantially parallel protruding claws 24, the ball 30 is always kept on the concave groove 22 or the two protruding claws. In order to hold it in the middle portion of 24, it is preferable that the middle portions of the upper edge portions of both side wall portions of the concave groove 22 and the middle portions of the upper edge portions of the two protruding claws 24 are formed to be gently recessed.

[0029]

[Third Embodiment] Next, a vibration damping unit for audio equipment according to a third embodiment of the present invention will be described with reference to FIGS.
The vibration damping unit 2 for audio equipment of this embodiment is shown in FIGS.
As shown in FIG.
0 and a ball 300. The upper housing 100 is made of a material having appropriate elasticity, such as a metal material,
A hard plastic or the like is formed into a cylindrical body with one end (lower end) having an opening and the other end being sealed. Upper housing 100
In the vicinity of both sides of the central portion of the inner side surface (lower surface) 121 of the top plate 120 at the sealing end of the above, two substantially parallel projecting claws 1 projecting downward from the lower surface of the top plate 120 to form a concave groove therebetween.
40 and 140 are provided. Further, at the end of the open end, a first locking portion 160 is formed which extends so as to slightly project inward from the inner peripheral surface of the end.

The lower housing 200 is also the upper housing 1.
A material with suitable elasticity like 00, for example, metal material, hard plastic, etc., with one end (upper end) having an opening,
The other end is formed into a sealed cylindrical body. Lower housing 2
Two substantially parallel projecting claws that project upward from the upper surface of the bottom plate 220 and form a recessed groove between the inner surface (upper surface) 221 of the bottom end of the bottom plate 220 and the central portion of the inner surface (upper surface) 221. 240, 240 are provided. Further, in order to form the cylindrical body portion at the opening end like a collet chuck,
Splits 250 are formed along the axial direction at four corresponding locations on the outer peripheral surface of the cylindrical body. On the outer peripheral surface of the end portion of the opening end, a second locking portion 260 is formed that extends from the opening end toward the sealing end so as to project slightly obliquely outward. The outer diameter of the cylindrical portion of the lower housing 200 is set to be slightly smaller than the inner diameter of the first locking portion 160 at the open end of the upper housing 100, and the lower housing 20 is
The outer diameter of the second locking portion 260 at the open end of 0 is set to be slightly larger than the inner diameter of the first locking portion 160 at the open end of the upper housing 100.

The ball 300 is made of a material having a high hardness, for example, a sintered body of glass or ceramics, and is formed into a spherical shape having a high roundness. The outer diameter of the ball 300 is the protruding claws 140 and 14.
The width between 0 and the width between the protruding claws 240, 240 are set to be larger.

As shown in FIG. 6, when assembling the upper housing 100, the lower housing 200, and the ball 300 as the vibration damping unit 2 for audio equipment, first, the lower housing 2
00 of the bottom plate 220, two substantially parallel protruding claws 240, 24 provided near both sides of the central portion of the upper surface 221.
Place the ball 300 on top of 0. In this state, when the opening end (collet chuck-shaped end) of the lower housing 200 is inserted into the inside of the upper housing 100 from the opening end, the second locking portion 260 at the opening end of the lower housing 200 is inserted.
Is temporarily reduced in diameter toward the inner diameter direction by the inner peripheral surface of the opening end of the upper housing 100, but the second locking portion 260 at the opening end of the lower housing 200 is the first locking at the opening end of the upper housing 100. When the portion 160 is penetrated, the lower housing 20
The elastic force of the collet chuck-shaped end portion of 0 restores the second locking portion 260 at the opening end of the lower housing 200 toward the outer diameter direction. As a result, the second locking portion 260 is locked by the first locking portion 160, and the upper housing 100 and the lower housing 200 are integrally coupled so as to be relatively movable in the direction of approaching and separating from each other. It

The outer diameter of the ball 300 is the same as that of the protruding claw 14.
Since the width between 0 and 140 and the width between the protruding claws 240 and 240 are set to be larger than the width between the protruding claws 140 and 240, the ball 300 is in contact with only the edge of the protruding claws 140 and 240. The contact resistance between 140 and 240 is very small. That is, the ball 300 has the protruding claws 140, 2
It is placed so as to be rotatable and slidable with respect to 40.

As shown in FIG. 7, when the vibration damping unit 2 for audio equipment is placed at three places on the lower surface of the speaker box 40 shown by the dotted line, for example, a loudspeaker (not shown) is installed. The horizontal component and the vertical component of the vibration generated by the speaker box 40 during operation are the upper housing 100 of the vibration damping unit 2 for audio equipment.
Be transmitted to. When the upper housing 100 is vibrated in the horizontal direction or the vertical direction due to the horizontal and vertical components of the vibration, the ball 300 rotatably and slidably interposed between the protruding claws 140 and 240 vibrates the upper housing 100. When receiving the ball, the ball 300 itself rotates or slides.
As a result, the vibration component of the upper housing 100 is absorbed by the rotation or sliding of the hole 300, and the vibration component is no longer transmitted to the lower housing 200.
It can almost completely block the transmission of vibrations to shelves and prevent the resonance phenomenon of floors and shelves.

[0035]

[Fourth Embodiment] Next, a vibration damping unit 2'for audio equipment according to a fourth embodiment of the present invention will be described with reference to FIG. The vibration damping unit 2'for audio equipment according to the fourth embodiment is the above-described third vibration damping unit.
Similar to the embodiment, the upper housing 100 ', the lower housing 200', and the ball 300 are used.
The difference from the embodiment lies in the means for supporting the ball 300. Ball 300 in the third embodiment
The means for supporting the bottom plate 22 of the lower housing 200 is
0 is the two projecting claws 240 provided on the upper surface 221 and the two projecting claws 140 are provided on the lower surface 121 of the top plate 120 of the upper housing 100. However, the projecting claws are not limited to such a form. Not a thing. For example, the protruding claw 140,
Instead of 240, as shown in FIG.
Groove 145 formed on the lower surface 121 of the top plate 120 of 00
And the groove 245 formed in the upper surface 221 of the bottom plate 220 of the lower housing 200. In this case, the ball 300 is provided with the edge portions 14 on both side walls of the groove 145.
6, 146 and the edge portions 246, 2 of both side walls of the groove 245.
It is mounted so as to be rotatable and slidable between the same and 46, and the same function and effect as in the third embodiment can be obtained.

In each of the above-described embodiments, the case where the vibration damping device and the vibration damping unit for audio equipment of the present invention are applied to the speaker box has been described, but the present invention is not limited to this, and, for example, a CD player, It will be easily understood that the present invention can also be applied to audio equipment such as an LP record player.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a vibration damping device for audio equipment of a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a vibration damping device for audio equipment of a first embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a vibration damping device for audio equipment of a second embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a modified example of the vibration damping device for audio equipment according to the first embodiment of the present invention.

FIG. 5 is an exploded perspective view showing a vibration damping unit for audio equipment of a third embodiment of the present invention.

FIG. 6 is a vertical sectional view showing a vibration damping unit for audio equipment of a third embodiment of the present invention.

FIG. 7 is a perspective view showing a mode of use of the vibration damping unit for audio equipment of the third embodiment of the present invention.

FIG. 8 is a vertical sectional view showing a vibration damping unit for audio equipment of a fourth embodiment of the present invention.

FIG. 9 is an exploded perspective view showing a conventional vibration suppressing means.

[Explanation of symbols]

1,1 'Vibration damping device for audio equipment 2,2 'Vibration reduction unit for audio equipment 10 Upper plate 11,21 shallow recess 12, 22, 145, 245 concave groove 20 Lower plate 14,24,140,240 protruding claw 30,300 balls 40 speaker box 50 connecting means 51,52 hook tape 54 loop tape 80 cone 90 Support disk 91 Support hole 100,100 'upper housing 200 lower housing 160 First locking portion 250 cracks 260 Second locking part

Claims (5)

(57) [Claims] 1. An upper plate, a lower plate, and at least three or more balls interposed between the upper plate and the lower plate, wherein the lower surface of the upper plate has substantially the same circumference. And a supported part extending substantially along the circumferential direction is provided at least at three or more locations that divide the circumference into a plurality of substantially uniform arcs, and the supported part is provided on the upper surface of the lower plate. A supporting portion is provided at least at three or more locations corresponding to the supporting portion so as to face the supported portion, and each of the balls is rotatably and slidably interposed between the supported portion and the supporting portion. In addition, the two short lines are in contact with the supported portion and / or the supporting portion at the same time in point contact with two short lines spaced apart from each other in parallel, and the two short lines are the lower surface of the upper plate and / or the lower plate. Up
Edge of the concave groove formed on the surface and / or below the upper plate
Surface and / or the top of the protruding claw protruding from the upper surface of the lower plate.
Is a vibration damping device for audio equipment. 2. The vibration damping device for audio equipment according to claim 1 , wherein the upper plate and the lower plate are detachably connected by a connecting means. Wherein said top plate is sound equipment for down-vibration system according to claim 1 or 2, characterized in that a bottom plate of the speaker box. 4. An upper housing in which one end is an opening and the other end is sealed, and a supported portion is provided on the inner surface of the top plate of the sealed end, and one end is an opening and the other end is sealed, And a lower housing provided with a supporting portion on the inner surface of the bottom plate at the sealing end, and a ball rotatably and slidably interposed between the supporting portion and the supported portion, The housing and the lower housing are integrally connected so that the two inner surfaces are relatively movable in a direction toward and away from each other, and the ball is in point contact with two short lines that are substantially parallel and spaced from each other. The two short lines are in contact with the supported part and / or the supporting part, and the two short lines are the sealing ends of the upper housing .
Inner surface of the top plate and / or bottom plate of the sealing end of the lower housing
Edge of the groove formed on the inner surface of the and / or above
Inner surface of top plate of sealing end of housing and / or lower housing
Of the protruding claw protruding from the inner surface of the bottom plate of the sealing end of the ring
A vibration damping unit for audio equipment. 5. A speaker box comprising the vibration damping unit for audio equipment according to claim 4 on a lower surface of a bottom plate thereof.