JPH10331911A - Vibration reducing device for acoustic equipment and vibration reducing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration reducing device for acoustic equipment and a vibration reducing unit capable of securely shutting out vibration generated in a speaker box of the acoustic equipment, particularly, a loud speaker with simple structure. SOLUTION: When a loud speaker is operated, vibration generated in a speaker box is absorbed by turning or sliding motion of a ball 30 turnably and slidably interposed between an upper plate 10 and a lower plate 20, thus shutting out transmission of the vibration to a floor or a rack so as to prevent any resonant phenomenon of the floor or the rack.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an audio equipment,
In particular, provided on the lower surface of the bottom plate of the loudspeaker speaker box and the like, the vibration generated by the speaker box when the loudspeaker is operating is minimized, and the vibration is transmitted to the floor where the speaker box is placed The present invention relates to a vibration damping device and a vibration damping unit for audio equipment used to suppress the occurrence of a resonance phenomenon.

[0002]

2. Description of the Related Art When a loudspeaker is operating, the speaker box itself resonates, and if the vibration is transmitted to a floor or the like on which the loudspeaker is placed, the floor also causes a resonance phenomenon. Not only does it resonate to produce the sound of the frequency, it also changes the sound of the loudspeaker itself.

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

[0004] In such a vibration suppressing means comprising the conical body 80 and the supporting disk 90, of the vibration components generated by the speaker box when the loudspeaker is operating,
In particular, since the vibration in the vertical direction cannot be completely cut off, the vertical component of the vibration is concentrated on the tip of the cone 80,
Further, the light is transmitted from the tip to a floor or the like via the support disk 90. Therefore, there is a disadvantage that the problem of causing resonance of the floor or the like cannot be completely eliminated, and there is room for improvement.

[0005]

SUMMARY OF THE INVENTION In view of the above disadvantages in the prior art, the present invention provides a method for producing a horizontal component of vibration generated by a speaker box when an audio equipment, for example, a loudspeaker is operating. It is a first object of the present invention to provide a vibration-reduction device for acoustic equipment that can completely completely prevent transmission of vibration to a floor, a shelf, or the like by completely eliminating vertical components.

It is a second object of the present invention to provide a vibration damping unit for use 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]

In order to achieve the first object, the vibration damping device for audio equipment according to the first invention of the present application has an upper plate, a lower plate, and a lower plate interposed between the upper plate and the lower plate. At least 3
And at least three places on the lower surface of the upper plate that are substantially on the same circumference and that divide the circumference into a plurality of substantially uniform arcs. Providing a supported portion extending along the circumferential direction;
Also on the upper surface of the lower plate facing the supported portion,
At least three or more support portions corresponding to the supported portions are provided; the outer diameter of the ball is formed to be larger than the width of the supported portion and the support portion, and each of the balls is rotated and rotated.
It is slidably interposed between the support part and the supported part.

When the vibration damping device for audio equipment of the first aspect of the present invention is used by placing it on the lower surface of a loudspeaker, it is located on substantially the same circumference between the upper plate and the lower plate. Since at least three or more balls are rotatably and slidably interposed between the supporting portion and the supported portion at least at three or more locations defined by 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, the upper plate is vibrated in the horizontal or vertical direction by 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.
Vibration transmission to shelves, etc. is almost completely blocked, and resonance phenomena on floors, shelves, etc. are reliably prevented.

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 of the first invention is provided as follows.
The upper plate and the lower plate may be configured to be separably connected to connecting means. According to the configuration of the second invention, in addition to having the advantage of the first invention, the upper plate and the lower plate are connected so as to be separable by the connecting means, so that the upper plate, the ball and the lower plate do not fall apart, It becomes easier to use.

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

[0012] In order to achieve the second object of the present invention described above, a vibration damping unit for audio equipment according to a fourth invention of the present application comprises:
An upper housing in which one end is open, 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 open, the other end is sealed, and A lower housing in which a support portion is provided on the inner surface of the bottom plate; and a ball having an outer diameter larger than the width of the supported portion and the support portion, wherein the upper housing and the lower housing are The two inner surfaces are integrally connected so as to be relatively movable in a direction of approaching / separating from each other, and the ball rotates /
It is slidably interposed between the support part and the supported part.

When at least three or more of the vibration reduction units are arranged and used on the lower surface of the loudspeaker, the horizontal component and the vertical component 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. However, the top plate of the upper housing and the bottom plate of the lower housing rotate and slide. 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 or the like, and the transmission of the vibration to the floor or shelf is almost completely shut off, as in the first invention of the prior art, and the resonance phenomenon of the floor or shelf is reliably prevented. To prevent.

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

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

[0016]

First Embodiment First, a vibration damping device for an audio equipment according to a first embodiment of the present invention will be described with reference to FIGS. First
As shown in FIGS. 1 and 2, the vibration damping device 1 for an audio equipment according to the embodiment basically has an upper plate 10, a lower plate 20, and an intervening member between the upper plate 10 and the lower plate 20. And three balls 30 arranged so as to make the ball. The upper plate 10 is made of a material having a suitable rigidity, for example, a metal material, a hard plastic, or the like, and is formed into a disk shape. Shallow recesses 11 extending substantially along the circumferential direction are formed at three locations defined by the arcs, and further, a concave groove 12 extending substantially along the circumferential direction is formed at the center of each shallow recess 11. Have been.

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 on the surface (upper surface) on the side facing the upper plate 10 corresponding to each shallow concave portion 11 and each concave groove 12 of the upper plate 10. Is formed.

The ball 30 is formed into a spherical shape with high roundness using a material having high hardness, for example, a sintered body of glass or ceramic. The outer diameter of the ball 30 is set to be smaller than the width of the shallow concave portions 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 concave 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 using the vibration damping device 1 for acoustic equipment of the first embodiment, as shown in FIG. 2, it is formed along the center 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. 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 opposing side walls of the groove 22.
Are supported so as to be pivotable and slidable along. In this state, three shallow recesses 11 formed on the lower surface of the upper plate 10 are further formed.
The groove 12 formed along the center circumference of each ball 30
The upper plate 10 is arranged so as to be placed on the top. Ball 30
Is larger than the groove width of the concave groove 12 of the upper plate 10, the upper plate 10 slides along the upper spherical surface of the ball 30 by the edges 111 and 112 of the two opposing side walls of the concave groove 12. 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. 3, edges 111 and 112 of both side walls of the concave groove 12 and edges 211 and 112 of both side walls of the concave groove 22 are formed.
Since there are only four points at 212, the contact resistance between the ball 30 and the concave grooves 12, 22 is very small. That is, the ball 30 is mounted so as to be rotatable and slidable between the concave grooves 12 and 22.

In this state, when the speaker box 40 indicated by the dotted line is placed on the upper surface of the upper plate 10, for example, the vibration generated by the speaker box 40 when a loudspeaker (not shown) is operating. Are transmitted to the upper plate 10, and when the upper plate 10 is vibrated in the horizontal direction or the vertical direction by the horizontal component and the vertical component, rotation and sliding are performed between the concave grooves 12 and 22. When the three balls 30 movably interposed 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. It is possible to completely shut off and reliably prevent resonance phenomena such as floors and shelves.

[0022]

Embodiment 2 With reference to FIG. 3, a description will be given of a vibration damping device 1 'for audio equipment according to a second embodiment of the present invention. The basic configuration of the vibration damping device for acoustic equipment 1 'of the second embodiment is the same as that of the above-described first embodiment, but in the first embodiment, the upper plate 10 and
Since the three balls 30 and the lower plate 20 are separately formed separately, in consideration of the possibility that the balls 30 may be lost at the time of installation, both are integrally formed on the upper plate 10 and the lower plate 20. A connection means 50 for connection is further provided.

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

The upper plate 10, the lower plate 20, and the three balls 30
In the arrangement 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 the audio equipment in a state where the upper plate 10 and the lower plate 20 are integrally connected, the ball 30 is prevented from being lost from between the upper plate 10 and the lower plate 20. it can. Note that once the vibration damping device for audio equipment 1 ′ is installed on, for example, the lower surface of the speaker box 40, the loop tape 54 is connected to the hook tape 51,
52 may be removed.

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

In the first and second embodiments, the upper plate 10 may be formed directly from the bottom plate of the speaker box 40. By doing so, the first and second
In addition to obtaining the same effects as the embodiment, the number of parts can be further reduced, so that the cost is further improved.

In the first and second embodiments, the means for supporting the ball 30 is formed by three concave grooves 22 formed on the upper surface of the lower plate 20 and formed on the lower surface of the upper plate 10. The three grooves 12 are not limited to such a form of the grooves. For example, the grooves 12 and 22
Instead, as shown in FIG. 4, two substantially parallel protruding 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 if the two members are formed by two substantially parallel protruding claws 24 forming a concave groove between them.

When the ball 30 is placed on the concave groove 22 formed on the upper surface of the lower plate 20 or on the two substantially parallel projecting claws 24, the ball 30 is always placed on the concave groove 22 or the two projecting claws 24. In order to hold the groove at the intermediate portion of the groove 24, it is preferable that the intermediate portion of the upper edge of both side walls of the concave groove 22 and the intermediate portion of the upper edge of the two protruding claws 24 are formed to be slightly concave.

[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.
FIGS. 5 and 6 show the vibration damping unit 2 for audio equipment of this embodiment.
As shown in FIG.
0 and the ball 300. The upper housing 100 is made of a material having appropriate elasticity, for example, a metal material,
One end (lower end) is made of hard plastic or the like, and is formed in a cylindrical body having an opening at one end and another end sealed. Upper housing 100
The two substantially parallel protruding claws 1 protruding downward from the lower surface of the top plate 120 to form a concave groove between the two near the center of the inner surface (lower surface) 121 of the top plate 120 at the sealing end of
40 and 140 are provided. In addition, a first locking portion 160 is formed at the end of the opening end so as to extend slightly from the inner peripheral surface of the end to the inner diameter direction.

The lower housing 200 is also the upper housing 1
A material having appropriate elasticity like 00, for example, a metal material, a hard plastic, etc.
The other end is formed in a sealed cylinder. Lower housing 2
Two substantially parallel protruding claws projecting upward from the upper surface of the bottom plate 220 to form a concave groove therebetween near the center portion of the inner surface (upper surface) 221 of the bottom plate 220 at the sealing end of 00. 240, 240 are provided. Also, in order to form the cylindrical portion at the opening end like a collet chuck,
Fractures 250 are formed at four corresponding locations on the outer peripheral surface of the cylindrical body along its axial direction. A second locking portion 260 is formed on the outer peripheral surface of the end of the opening end so as to extend slightly obliquely outward from the opening end toward the sealing end. 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 opening end of the upper housing 100, and
The outer diameter of the second locking portion 260 at the opening end of the upper housing 100 is set slightly larger than the inner diameter of the first locking portion 160 at the opening 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 in a spherical shape with high roundness.
The width between 0 and the width between the protruding claws 240, 240 is set to be larger than that.

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
Two substantially parallel protruding claws 240, 24 provided near both sides of the center of the upper surface 221 of the bottom plate 220
0 is placed on the ball 300. In this state, when the open end (collet chuck-like end) of the lower housing 200 is inserted into the upper housing 100 from the open end thereof, the second locking portion 260 at the open end of the lower housing 200 is formed.
Is temporarily reduced in the radial direction by the inner peripheral surface of the open end of the upper housing 100, but the second locking portion 260 at the open end of the lower housing 200 is the first lock at the open end of the upper housing 100. When penetrating the portion 160, the lower housing 20
Due to the elasticity of the collet chuck-shaped end portion of 0, the second locking portion 260 at the open end of the lower housing 200 is restored in the outer radial direction. Accordingly, 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 connected so as to be relatively movable in a direction of approaching / separating from each other. You.

Note that the outer diameter of the ball 300 is
Since the width between 0, 140 and the width between the protruding claws 240, 240 is set to be larger than the width between the protruding claws 240, 240, the ball 300 is in contact with only the edges of the protruding claws 140, 240. The contact resistance between 140 and 240 is very small. That is, the ball 300 has the protruding claws 140, 2
It is mounted so as to be rotatable and slidable between itself and 40.

As shown in FIG. 7, when such a vibration damping unit 2 for audio equipment is arranged at three places on the lower surface of a speaker box 40 indicated by dotted lines, for example, a loudspeaker (not shown) is used. During operation, the horizontal component and the vertical component of the vibration generated by the speaker box 40 are changed to the upper housing 100 of the vibration damping unit 2 for the acoustic equipment.
Is transmitted to When the upper housing 100 is vibrated in the horizontal or vertical direction by the horizontal and vertical components of the vibration, the ball 300 interposed between the protruding claws 140 and 240 so as to be rotatable and slidable causes the upper housing 100 to vibrate. Then, 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.
Vibration transmission to a shelf or the like can be almost completely blocked, and a resonance phenomenon on the floor or the shelf can be prevented.

[0035]

Fourth Embodiment Next, a vibration damping unit 2 'for an audio equipment according to a fourth embodiment of the present invention will be described with reference to FIG. The vibration damping unit 2 ′ for the acoustic equipment according to the fourth embodiment is the same as the above-described third embodiment.
In the same manner as in the embodiment, the upper housing 100 ', the lower housing 200', and the ball 300 are provided.
What differs from the embodiment is the means for supporting the ball 300. In the third embodiment, the ball 300
The means for supporting the bottom plate 22 of the lower housing 200
The two protruding claws 240 provided on the upper surface 221 of the first housing 100 and the two protruding claws 140 provided on the lower surface 121 of the top plate 120 of the upper housing 100 are limited to such protruding claws. Not something. For example, protruding claws 140,
Instead of 240, as shown in FIG.
Groove 145 formed in the lower surface 121 of the top plate 120 of FIG.
And a concave 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 positioned at the edge portions 14 on both side walls of the concave groove 145.
6,146 and edges 246,2 of both side walls of the groove 245
Thus, the same functions and effects as those of the third embodiment can be obtained.

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

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view showing the vibration damping device for audio equipment according to the first embodiment of the present invention.

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

FIG. 4 is a longitudinal sectional view showing a modification 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 according to a third embodiment of the present invention.

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

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

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

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

[Explanation of symbols]

 1, 1 'Vibration reduction device for sound equipment 2, 2' Vibration reduction unit for sound equipment 10 Upper plate 11, 21, Shallow recess 12, 22, 145, 245 Groove 20 Lower plate 14, 24, 140, 240 Projection claw 30 , 300 ball 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 split 260 second locking portion

Claims (7)

[Claims] 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 is substantially on the same circumference. And a supported portion 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 opposed to the supported portion on the upper surface of the lower plate. Support portions are provided at at least three places corresponding to the supported portions; the outer diameter of the ball is formed larger than the width of the supported portion and the support portion, and each of the balls is turned A vibration damping device for acoustic equipment, wherein the vibration damping device is movably and slidably interposed between the support portion and the supported portion. 2. The vibration damping device according to claim 1, wherein said upper plate and said lower plate are separably connected by connecting means. 3. The vibration damping device for audio equipment according to claim 1, wherein the upper plate is a bottom plate of a speaker box. 4. The supported portion is formed by a concave groove formed on the lower surface of the upper plate or two substantially parallel protruding claws projecting downward from the lower surface of the upper plate to form a concave groove therebetween. The supporting portion is formed by a concave groove formed on the upper surface of the lower plate or two substantially parallel protruding claws projecting upward from the upper surface of the lower plate to form a concave groove therebetween. The vibration damping device for audio equipment according to any one of claims 1 to 3, wherein: 5. An upper housing having an opening at one end, a sealed end at the other end, and a supported portion provided on the inner surface of the top plate at the sealed end; an opening at one end and a sealing at the other end; And a lower housing provided with a supporting portion on the inner surface of the bottom plate at the sealing end; and a ball having an outer diameter larger than the width of the supported portion and the supporting portion, wherein the upper housing and the lower housing are The two inner surfaces are integrally connected so as to be relatively movable in a direction of approaching and separating from each other, and the ball is rotatably and slidably interposed between the supporting portion and the supported portion. A vibration damping unit for audio equipment. 6. The supported portion is formed by a concave groove formed on the lower surface of the top plate or two substantially parallel protruding claws projecting downward from the lower surface of the top plate to form a concave groove therebetween. Wherein the support portion is formed by a concave groove formed on the upper surface of the bottom plate or two substantially parallel protruding claws projecting upward from the upper surface of the bottom plate to form a concave groove therebetween. The vibration reduction unit for audio equipment according to claim 5. 7. A speaker box, wherein the vibration reduction unit for audio equipment according to claim 5 is provided on a lower surface of the bottom plate.