JPH10304484A - Insulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly improve an acoustic characteristic by insulating a mechanical vibration delivery relation between a speaker box and a floor, so as to improve modulation distortion and to reduce the vibration of the floor. SOLUTION: This insulator includes a metal-made support member 10 that supports a bottom of a case 2 such as a loudspeaker box, a tray 30 placed on a support face 2 such as floor, and a metal-made vibration absorbing member 20 such as a spring steel placed between the support member 10 and the tray 30. Then the vibration member 20 is made of a strip or a rod which is curved in itself, and its lower end is point-supported by the tray 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulator arranged between a housing having a vibration source therein and a support surface for supporting the housing to absorb vibration of the housing, and more particularly to an insulator for a speaker box. The present invention relates to a technique suitable for an insulator for absorption.

[0002]

2. Description of the Related Art For example, in an audio system,
There are many attempts to improve sound quality by placing a speaker box on an insulator. Various types of insulators of this type have been proposed in the past, but basically, in order to suppress the vibration of the speaker box (housing), the base is mounted on a strong object as much as possible.
The design is based on the idea of reducing the modulation distortion due to the vibration of the speaker box by solidifying the base.

[0003] Such conventional general insulators are made of a relatively hard material such as iron, brass, hard wood, ceramic material, acrylic resin, etc., and are provided with a conical convex portion in part and pinpointed. A supporting (point supporting) configuration or a configuration using a square tree is usually used, and these are set so as to be sandwiched between the floor 1 and the speaker box 2 as shown in FIG. .
In this way, each insulator 3 (usually four)
Are almost equally weighted, and each supports the speaker box 2 as a fulcrum.

[0004]

A problem in such a supporting form of the speaker box is the relationship between the resonance frequency of the entire speaker box 2, the vibration energy of the diaphragm of the speaker 4, and the fulcrum.

[0005] That is, the vibration of the speaker 4 generates wind pressure by the diaphragm. In response to the wind pressure, when the speaker box 2 tries to move as a reaction, the front and rear insulators 3 are alternately pressed, whereby the speaker box 2 moves and the floor 1 vibrates. In this case, even when the resonance frequency of the weight of the entire speaker box 2 is far from the reproduction frequency, the floor 1 vibrates by receiving the vibration energy of the diaphragm. These are the phenomena when using an insulator lacking the existing vibration absorbing ability.

The present invention has been made in view of the above points, and employs a concept opposite to the conventional concept of solidifying a base, and provides a suitable cushioning function and a longer vibration transmission path. By separating the mechanical vibration transmission relationship between the speaker box and the floor, we aim to provide a technology that can improve the modulation distortion, reduce the floor vibration, and dramatically improve the acoustic characteristics. Things. Further, the present invention aims to provide a technology capable of significantly improving the vibration absorbing function of a housing having a vibration source inside similarly to the speaker box.

[0007]

In order to solve the above-mentioned problems, according to the present invention, there is provided a method for absorbing vibration of a housing by arranging the housing having a vibration source therein and a supporting surface for supporting the housing. An insulator, comprising: a support member for supporting a bottom portion of a housing; a receiving member placed on a support surface; and a vibration absorbing member disposed between the supporting member and the receiving member. The lower end of the belt-shaped or rod-shaped member is supported by a point on the receiving member. Here, it is also very suitable to adopt a configuration in which the vibration absorbing member is formed to be curved in a coil shape. Further, a configuration may be employed in which a downward conical convex portion is provided at the lower end portion of the vibration absorbing member, and a downward conical concave portion having an obtuse angle than the convex portion is provided on the upper surface of the receiving member. It is also very suitable to fix the upper end of the vibration absorbing member to the bearing member via an adhesive layer. It is also preferable that an elastic material layer is provided on at least one of the upper surface side of the support member and the lower surface side of the receiving member. Further, the receiving member includes an inclination adjusting mechanism, and the inclination adjusting mechanism is disposed between the base and the receiving member disposed below the receiving member, and the upper end portion is screwed into the receiving member. It is also possible to include a plurality of adjustment bolts provided so as to be adjustable in length up and down, and to support at least three points on the base at the lower end of each adjustment bolt. Also,
A spherical recess for receiving the lower end of the adjusting bolt may be provided on the surface of the base. Further, it is also very suitable to adopt a configuration in which an elastic material layer is provided on the lower surface side of the base.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a front view showing an overall configuration of an insulator according to Embodiment 1, FIG. 2 is a front view of an insulator according to Embodiment 2, FIG. 3 is a front view of an insulator according to Embodiment 3, and FIG. 4 is a side view showing the state of use, FIG. 5 is a partially enlarged view of FIG. 4, and FIG. 6 is a partial cross-sectional view of the insulator according to the fourth embodiment.

(Embodiment 1) An insulator A shown in FIG. 1 includes a metal support member 10 for supporting the bottom of a housing 2 such as a speaker box, and a receiving member 30 to be placed on the support surface 2 such as a floor. A metal vibration absorbing member 20 such as spring steel disposed between the bearing member 10 and the receiving member 30;
The vibration-absorbing member 20 is formed of a band-shaped or rod-shaped member that is curved itself, and has a configuration in which the lower end portion is point-supported with respect to the receiving member 30.

Next, these details will be described.
The support member 10 has a metal disc shape or a planar polygonal shape including a square shape, and has an elastic material layer 11 on the upper surface side for providing the housing 2 with a slip preventing and vibration absorbing function.
A cavity 12 is provided on the lower surface side, and the upper end of the vibration absorbing member 20 is fixed in the cavity 12. As for the fixing method of both, it is possible to directly fix them mechanically, but from the viewpoint of preventing vibration transmission, they are fixed via an adhesive layer (not shown) in the sense of eliminating contact between metals. That is, by applying a rubber-based adhesive for metal to the mutual contact portions and then joining them, care is taken to prevent direct contact with each other.

The vibration absorbing member 20 is formed by bending a band-shaped or bar-shaped spring steel into a coil shape, and has a downwardly conical convex portion 21 at the lower end thereof. The projection 21 is formed by fixing another conical member to the lower end of the vibration-absorbing member 20, and is also made of metal. For fixing, a rubber-based adhesive is also used to prevent direct contact with each other.

The receiving member 30 has a cylindrical shape having a plane similar to that of the bearing member 10 or a planar polygonal shape including a quadrilateral. Here, the receiving member 30 has a certain mass (weight) and a sufficient vibration absorption. The thickness of the receiving member 30 is increased, and a lead weight member 30a is packed inside.

On the upper surface of the receiving member 30, a downwardly conical concave portion 32 for receiving the downwardly conical convex portion 21 is provided. The concave portion 32 is a downwardly conical concave portion having an obtuse angle smaller than that of the convex portion 21, thereby allowing the convex portion 21 to be tilted in an arbitrary direction.

The receiving member 30 has an inclination adjusting mechanism capable of adjusting the inclination of the housing 2. The tilt adjusting mechanism is disposed between a base 31 disposed under the receiving member 30 and the base 31 and the receiving member 30, and is screwed into a screw hole 32 on a lower surface side of the receiving member 30. And a plurality of adjustment bolts 33 provided so that the length can be adjusted vertically. There are three adjusting bolts 33, and the lower end of each adjusting bolt 33 is supported at three points on the base. That is, the three adjustment bolts 33 are arranged at intervals of 120 degrees in plan view.

Further, on the surface of the base 31, there is provided a spherical recess 34 for receiving the lower end 33a of each adjustment bolt 33. The reason why the recess 34 is provided is that the front, rear, left, and right inclinations of the housing 2 can be arbitrarily and securely adjusted as necessary, as described later.

Incidentally, the vibration absorbing member 20 constituting the main part of the insulator is adopted based on the idea that the vibration transmission path is made longer rather than the cushion function as a spring. From such a meaning, in the illustrated example, the belt-shaped or rod-shaped member is formed in a curved shape in a coil shape, thereby extending the vibration transmission path. Therefore, in addition to the coil shape, a spiral shape or the like can be used.

Further, the spring constant when the coil is formed in this manner is set so that the amount of deflection when the housing 2 is mounted is about 10% for the above-described reason. For the definition of this deflection amount, refer to “Deflection amount (%)
= Deflection size / length L of vibration-absorbing member 20 ". Therefore, according to the weight of the housing 2, a spring having a spring constant suitable for it is used, or the number of insulators A to be used is selected.

According to the experimental results, if the deflection amount is too small, the vibration absorbing effect is reduced. Conversely, if it is too large, not only will the support stability of the housing 2 be impaired, but also the permanent set will increase over a long period of use, resulting in the same condition as increased hardness, and the vibration absorbing effect will be reduced.

An elastic material layer 35 is also provided on the lower surface side of the base 31 which is in direct contact with the floor 1 in order to absorb vibration and prevent slippage. The same material is used for the elastic material layer 35 and the elastic material layer 11 of the support member 10. The material forming these elastic material layers and the elastic coefficient thereof are not particularly limited. For example, a material having the same degree of deflection (about 10%) as the vibration absorbing member 20 under the weight of the housing 2 is preferable. It is. As an example, rubber rubber having low rebound resilience such as honeynite (trade name) can be used.

According to the insulator A having such a configuration, the vibration transmitted from the housing 2 to the floor 1 based on the vibration of the housing 2 as the speaker box can be significantly reduced by the action of the vibration absorbing member 20. That is, when the coil-shaped vibration absorbing member 20 is extended, it has a sufficient length (several times or more) as compared with the apparent length L shown in the drawing. In this manner, the housing 2 is supported, and the housing 2 is supported as if it were suspended in the air by an elongated rod. Therefore, as the vibration transmission path becomes longer, the vibration damping rate in the middle becomes larger.

In addition, the vibration-absorbing member 20 has a slight but well-balanced cushioning property (elasticity).
Therefore, the function of the fulcrum in the correlation between the resonance frequency and the vibration energy of the entire housing 2 and the fulcrum is substantially eliminated, and the vibration of the housing 2 itself is reduced. Therefore, also from this point, a good vibration absorbing effect is exhibited. As a result, it is possible to improve the modulation distortion of the acoustic system and reduce the vibration of the floor, thereby making it possible to achieve an epoch-making clear sound.

Considering further the vibration absorbing function, the individual insulators A supporting the housing 2 have an appropriate cushioning property, so that the housing 2 loses a fulcrum for vibration (see FIG. 13). . as a result,
When receiving vibration energy from the speaker 4 and receiving vibrations equal to or higher than the resonance frequency of the entire housing 2, a phenomenon occurs in which the housing 2 itself hardly moves. If the vibration below the resonance frequency is applied, the housing 2 tends to move.
Resonance frequency is much lower than the frequency of music playback,
Actually, the case where the housing 2 reacts under the influence of the diaphragm is extremely small experimentally. Music playback frequency is about 20
Hz to 30 KHz, and the resonance frequency of the housing 2 is at most 10
This is because the frequency is about 5 Hz when the weight of the housing 2 is large (30 kg or more).

(Embodiment 2) FIG. 2 shows another embodiment of an insulator according to the present invention. In an insulator B shown in this embodiment, a bearing member 10 and a vibration absorbing member having a convex portion 21 are provided. 20 and a receiving member 30 without the tilt adjusting mechanism including the base 1 and the adjusting bolt 33 shown in the first embodiment.
Therefore, the elastic material layer 36 is placed on the lower surface of the receiving member 30.
Is provided directly. In the case of such a configuration, there is an advantage that the configuration can be simplified without lowering the vibration absorbing function.

(Embodiment 3) FIG. 3 shows an embodiment suitable as a relatively small insulator C. The insulator C has the same basic configuration as that described in the first embodiment, but the height of the receiving member 30 and the base 31 is reduced (thinned) in consideration of a small size. I have.

FIG. 4 shows a state of use of the insulator C shown in the third embodiment, and shows a state in which a housing 2 as a speaker box is supported by being inclined to the front side. As can be understood from the drawing, the length of each adjustment bolt 33 protruding from the receiving member 30 is adjusted so that the receiving member 3 can be adjusted.
0 can be inclined, whereby the housing 2 can be inclined. Such a use form is very suitable when the sound from the speaker 4 is adjusted so as to be directed to the height of the ear of the listener.

Of course, by adjusting each adjustment bolt 33,
As shown in the figure, not only the inclination to the front side but also the inclination to the rear or to the left or right can be made as necessary. In this case, as shown in FIG. 5, since the recess 34 has a spherical shape, even if the adjustment bolt 33 is inclined, the inclination is allowed, and the lower end 33 a of the adjustment bolt 33 is formed on the surface of the recess 34.
Point support firmly.

(Embodiment 4) FIGS. 6 to 8 show still another embodiment of the insulator according to the present invention. In the case of the insulator D according to this embodiment, the insulator D is attached to the bottom surface 2a of the housing 2. It is designed to be embedded in a part.

That is, the insulator D shown here is also basically a cylindrical or disk-shaped support member 110, a vibration absorbing member 120 having a downwardly conical convex portion 121, and a cylinder or a cylinder having the same diameter as the support member 110. And a disk-shaped receiving member 130. However, external threads 111 and 131 are provided on the outer peripheral surfaces of the support member 110 and the receiving member 130, respectively.
The insulator D is screwed and housed in a housing hole 2b with a female thread provided to be opened on the bottom surface 2a of the housing 2.

The vibration absorbing member 120 is also formed in a coil shape, and its upper end is inserted into a space 112 provided on the lower surface side of the support member 11 and fixed with an adhesive. On the upper surface of the receiving member 130, a downward conical concave portion 132 for receiving the convex portion 121 is provided.

When the insulator D is not used or when it is transported, the insulator D can be screwed and housed in the housing hole 2b as shown in FIG. In this storage state, when the receiving member 130 is screwed in, the vibration absorbing member 120 is bent and screwed to such an extent that a slight repulsive force is generated, whereby the vibration itself can be prevented. At the time of use, as shown in FIG.

Here, the vibration absorbing member 120 and the receiving member 130
Since it is a separate member from the above, it is not always necessary to consider the operability at the time of operating the insulator D. This is because the size of the storage hole 2b may be so small that it is difficult to insert a finger.

FIGS. 9 to 12 show the operability in such a case. In the case of FIGS. 9 and 10, an operation groove 133 is provided on the bottom side of the receiving member 130 so that the operation groove 133 can be rotated by, for example, a Phillips screwdriver or a flathead screwdriver or a similar member. FIG.
Also, in the case of FIG. 12, the operating groove 123 similar to that of the receiving member 130 is provided at the tip of the convex portion 121 of the vibration absorbing member 120.

In each of the above embodiments, an example of the insulator whose main part is made of metal has been described. However, a member made of resin or partially made of metal, resin, wood or the like is adopted. Is also good.

Further, in the embodiment, an example in which the housing 2 is a speaker box is shown. However, as for this housing, a housing having a vibration source therein, for example, an electric washing machine, a refrigerator, and other vibration absorbers It can also be applied to various devices that require

[0035]

As described above, according to the present invention, the supporting member for supporting the bottom of the housing, the receiving member placed on the supporting surface, and the vibration absorbing member disposed between the supporting member and the receiving member are provided. And the vibration absorbing member is formed of a band-shaped or rod-shaped member which is curved itself, and has a configuration in which the lower end portion is point-supported with respect to the receiving member, so that the following effects are obtained.

When the housing is a speaker box, the mechanical vibration transmission relationship between the speaker box and a supporting surface such as a floor is separated by extending the vibration transmission path in addition to the appropriate cushioning function of the vibration absorbing member, and thereby the modulation is performed. The distortion and the floor vibration can be reduced, and the acoustic characteristics can be remarkably improved. Further, in addition to the speaker box, the vibration absorbing function of a housing having a vibration source therein can be significantly improved.

Further, by forming the vibration absorbing member in a curved shape in a coil shape, the substantial length of the vibration absorbing member can be made sufficiently long as necessary.

Further, a downward conical convex portion is provided at the lower end of the vibration absorbing member, and a downward conical concave portion having an obtuse angle smaller than the convex portion is provided on the upper surface of the receiving member. A tiltable point support configuration can be used.

Further, by fixing the upper end of the vibration absorbing member to the support member via an adhesive layer, the contact between the metal members is eliminated, and in addition to the effect of reducing the vibration sound (friction sound) of the contact portion, Further, an effect of reducing vibration of the adhesive layer itself can be expected.

Further, by providing an elastic material layer on at least one of the upper surface side of the support member and the lower surface side of the receiving member, both the anti-slip effect and the vibration reduction effect can be simultaneously exhibited.

Further, the receiving member has an inclination adjusting mechanism, and the inclination adjusting mechanism is disposed between the base and the receiving member below the receiving member, and has an upper end portion at the receiving member. A plurality of adjustment bolts provided so as to be adjustable in length up and down by being screwed into the base, and at least three points are supported on the base at the lower end of each adjustment bolt,
The inclination angle of the housing can be arbitrarily adjusted as needed.

Further, by providing a spherical concave portion for receiving the lower end of the adjusting bolt on the surface of the base, even if the angle adjusting bolt is inclined, a state where the mutual contact portions are not forced is provided. The point can be firmly supported.

Further, by providing an elastic material layer on the lower surface side of the base, it is possible to further enhance the anti-slip and vibration-absorbing action with the support surface.

[Brief description of the drawings]

FIG. 1 is a front view of an insulator according to the present invention.

FIG. 2 is a front view showing a second embodiment of the present invention.

FIG. 3 is a front view showing a third embodiment of the present invention.

FIG. 4 is a side view of the used state of the insulator according to the present invention.

FIG. 5 is a partial cross-sectional view showing a recess of the insulator according to the present invention.

FIG. 6 is a partial sectional view showing a fourth embodiment of the present invention.

FIG. 7 is a partial sectional view showing a fourth embodiment of the present invention.

FIG. 8 is a partial sectional view of the insulator according to the present invention in use.

FIG. 9 is a bottom view showing another embodiment of the receiving member according to the present invention.

FIG. 10 is a side view showing another embodiment of the receiving member according to the present invention.

FIG. 11 is a bottom view showing another embodiment of the projection according to the present invention.

FIG. 12 is a side view showing another embodiment of the projection according to the present invention.

FIG. 13 is an explanatory diagram showing the operation of the insulator according to the present invention.

FIG. 14 is a side view showing a conventional insulator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support surface (floor) 2 Housing (speaker box) 2a Bottom surface 2b Storage hole 3 Insulator 4 Speaker 10, 110 Support member 11 Elastic material layer 12, 112 Void 20, 120 Vibration absorbing member 21, 121 Convex part 30, 130 Receiving member 30a heavy material 31 base 32, 132 recess 32a screw hole 33 adjusting bolt 33a lower end 34 recess 35, 36 elastic material layer 123, 133 operation groove A, B, C, D insulator

Claims (8)

[Claims] An insulator disposed between a housing having a vibration source therein and a support surface for supporting the housing for absorbing vibration of the housing, comprising: a supporting member for supporting a bottom of the housing; , A receiving member placed on the support surface, and a vibration absorbing member disposed between the supporting member and the receiving member, the vibration absorbing member is formed of a band-shaped or rod-shaped member having a curved shape, and a lower end portion thereof. An insulator characterized by being point-supported with respect to a receiving member. 2. The insulator according to claim 1, wherein the vibration absorbing member is formed in a curved shape in a coil shape. 3. A downwardly conical convex portion is provided at a lower end portion of the vibration absorbing member, and a downwardly conical concave portion having an obtuse angle than the convex portion is provided on an upper surface of the receiving member.
The insulator according to claim 1. 4. The insulator according to claim 1, wherein an upper end of the vibration absorbing member is fixed to the bearing member via an adhesive layer. 5. The insulator according to claim 1, wherein an elastic material layer is provided on at least one of an upper surface side of said support member and a lower surface side of said receiving member. 6. The receiving member includes an inclination adjusting mechanism, the inclination adjusting mechanism being disposed below the receiving member, and disposed between the base and the receiving member. A plurality of adjusting bolts which are screwed into a receiving member and are provided so as to be adjustable in length up and down, and are configured to support at least three points with respect to the base at a lower end of each adjusting bolt. The insulator according to any one of claims 1 to 4. 7. The insulator according to claim 5, wherein a spherical recess for receiving a lower end of the adjustment bolt is provided on a surface of the base. 8. The insulator according to claim 6, wherein an elastic material layer is provided on a lower surface side of the base.