JP3777019B2 - Insulator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insulator that is arranged between a housing having a vibration source inside and a support surface that supports the housing, and absorbs vibrations of the housing, and more particularly, a technique suitable as a vibration absorbing insulator for a speaker box. It is about.
[0002]
[Prior art]
For example, in audio systems, sound quality is often improved by placing a speaker box on an insulator. Various types of insulators have been proposed in the past, but basically, in order to suppress the vibration of the speaker box (casing), the foundation is placed on a solid object as much as possible, and the foundation is solidified. The design is based on the idea of reducing the modulation distortion caused by the vibration of the speaker box.
[0003]
Such conventional general insulators are relatively hard materials such as iron, brass, hard wooden materials, ceramic materials, acrylic resins, etc., and are provided with conical projections in part and supported by pinpoints (dots). (Support) structure or a shape 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. By doing so, weight is applied almost evenly to the individual insulators 3 (normally four), and each supports the speaker box 2 as a fulcrum.
[0004]
[Problems to be solved by the invention]
A problem in such a support form of the speaker box is the relationship between the resonance frequency of the entire speaker box 2 and the vibration energy and fulcrum of the diaphragm of the speaker 4.
[0005]
That is, the wind pressure generated by the diaphragm is generated by the vibration of the speaker 4. When the speaker box 2 tries to move as a reaction in response to the wind pressure, the front and rear insulators 3 and 3 are alternately pressed, and the floor 1 vibrates as the speaker box 2 tries to move. In this case, even when the resonance frequency of the weight of the entire speaker box 2 is different from the reproduction frequency, the floor 1 vibrates due to the vibration energy of the diaphragm. These are phenomena when using an insulator lacking in existing vibration absorption capability.
[0006]
The present invention has been made in consideration of the above points, and adopts a concept opposite to the conventional concept of solidifying a base, and in addition to an appropriate cushion function, the speaker box is lengthened. The mechanical vibration transmission relationship between the floor and the floor is separated, thereby improving the modulation distortion, reducing the floor vibration, and providing a technology that can dramatically improve the acoustic characteristics. .
Furthermore, the present invention intends to provide a technique that can significantly improve the vibration absorption function of a housing having a vibration source inside as well as the speaker box.
[0007]
[Means for Solving the Problems]
In order to achieve the above technical problem, the insulator according to the present invention has taken the following technical means.
That is, the insulator according to claim 1 is an insulator that is disposed between a housing having a vibration source inside and a support surface that supports the housing to absorb vibrations of the housing,
A bearing member for supporting the 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, wherein the vibration absorbing member is curved in a coil shape. In addition, 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, and the convex portion and the concave portion are provided. The receiving member is provided with a tilt adjusting mechanism, and the tilt adjusting mechanism is disposed between the base disposed below the receiving member, the base and the receiving member, and an upper end portion is provided. A plurality of adjustment bolts that are screwed into the receiving member so as to be vertically adjustable.
A spherical recess for receiving the lower end of the adjustment bolt is provided on the surface of the base, and at least three points are supported on the base by the lower end of each adjustment bolt .
The insulator according to claim 2 is the insulator according to claim 1, wherein the vibration absorbing member is formed by bending a band-shaped or rod-shaped member into a coil shape, and the vibration absorbing member has the casing placed on the support member and the vibration absorbing member is A deflection amount obtained by dividing a deflection dimension which is a deflection amount by an original length of the vibration absorbing member is set to be approximately 10%.
The insulator according to claim 3 is characterized in that, in claim 1 or 2, an upper end portion of the vibration absorbing member is fixed to the support member via an adhesive layer .
An insulator according to a fourth aspect is characterized in that in any one of the first to third aspects, 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 .
The insulator according to claim 5 is characterized in that, in claim 4, an elastic material layer is provided on the lower surface side of the base .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to FIGS.
1 is a front view showing an overall configuration of an insulator according to Embodiment 1, FIG. 2 is a front view of the insulator according to Embodiment 2, and FIG. 3 is a front view of the insulator according to Embodiment 3, 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 an insulator according to the fourth embodiment.
[0009]
(Embodiment 1)
An insulator A shown in FIG. 1 includes a metal support member 10 that supports the bottom of a housing 2 such as a speaker box, a receiving member 30 that is placed on a support surface 1 such as a floor, the supporting member 10 and the receiving member 30. A vibration absorbing member 20 made of a spring steel or the like disposed between the two members, and the vibration absorbing member 20 is formed of a band-like or bar-like member having a curved shape, and the lower end thereof is point-supported with respect to the member 30. It is configured.
[0010]
Next, these details will be described.
The support member 10 has a metal disk shape or a planar polygonal shape including a quadrangular shape, and an elastic material layer 11 is provided on the upper surface side thereof for preventing the housing 2 from slipping and absorbing vibration. There is a space 12 on the lower surface side, and the upper end portion of the vibration absorbing member 20 is fixed in the space 12. Although both of the fixing methods can be directly mechanically fixed, they are fixed via an adhesive layer (not shown) in order to eliminate contact between metals from the viewpoint of preventing vibration transmission. That is, care is taken so that they do not come into direct contact with each other by applying a rubber adhesive for metal to the contact portions and then joining them.
[0011]
The vibration absorbing member 20 is formed by bending a strip-shaped or rod-shaped spring steel into a coil shape, and a convex portion 21 having a downward conical shape is provided at the lower end portion thereof. The convex portion 21 is formed by fixing another conical member to the lower end portion of the vibration absorbing member 20, and is also made of metal. For fixing, rubber adhesive is also used so as not to contact each other directly.
[0012]
The receiving member 30 has a cylindrical shape having a plane similar to that of the support member 10 or a planar polygonal shape including a quadrangle. Here, the receiving member 30 is provided in consideration of giving some mass (weight) and vibration absorption. The thickness of the portion is increased, and a lead weight material 30a is packed inside.
[0013]
On the upper surface of the receiving member 30, a downward conical concave portion 32 for receiving the downward conical convex portion 21 is provided. The concave portion 32 is a downward conical concave portion having an obtuse angle with respect to the convex portion 21, thereby allowing the convex portion 21 to be inclined with respect to an arbitrary direction.
[0014]
The receiving member 30 includes an inclination adjustment mechanism that can adjust the inclination of the housing 2. This tilt adjustment mechanism is arranged between a base 31 disposed below the receiving member 30, and between the base 31 and the receiving member 30, and is screwed into a screw hole 32 on the lower surface side of the receiving member 30. And a plurality of adjustment bolts 33 that are vertically adjustable. There are three adjustment bolts 33, and the lower end of each adjustment bolt 33 is configured to be supported at three points with respect to the base. That is, the three adjustment bolts 33 are arranged at intervals of 120 degrees in a plan view.
[0015]
Further, a spherical recess 34 for receiving the lower end 33 a portion of each adjustment bolt 33 is provided on the surface of the base 31. The reason why the recess 34 is provided is to allow the front / rear / left / right inclination of the housing 2 to be arbitrarily and firmly adjusted as necessary, as will be described later.
[0016]
By the way, the vibration absorbing member 20 constituting the main part of the insulator is adopted based on the idea of lengthening the vibration transmission path rather than the cushion function as a spring. For this reason, in the illustrated example, the vibration transmission path is lengthened by bending the belt-shaped or bar-shaped member into a coil shape. Therefore, in addition to the coil shape, a spiral spiral shape or the like can be used.
[0017]
In addition, the spring constant in the case of the coil shape is set so that the deflection amount with the housing 2 placed is about 10% for the above reason. The definition of the deflection amount corresponds to a value obtained as “deflection amount (%) = deflection dimension / length L of vibration absorbing member 20”. Accordingly, a spring constant corresponding to the weight of the housing 2 is used, or the number of insulators A used is selected.
[0018]
According to the experimental results, if the amount of deflection is too small, the vibration absorption effect is reduced. On the other hand, if it is too large, not only will the support stability of the housing 2 be impaired, but the permanent distortion will increase with long-term use, which will be the same as when the hardness has increased, and the vibration absorption effect will be reduced.
[0019]
An elastic material layer 35 is also provided on the lower surface side of the base 31 that is in direct contact with the floor 1 in order to absorb vibration and prevent slipping. The elastic material layer 35 and the elastic material layer 11 of the support member 10 are made of the same material. The material forming these elastic material layers and the elastic modulus thereof are not particularly limited, but, for example, a material having a deflection amount similar to that of the vibration absorbing member 20 (around 10%) in a state where the weight of the housing 2 is received is preferable. It is. As an example, rubber rubber having a low impact resilience such as honeynite (trade name) can be used.
[0020]
According to the insulator A having such a configuration, the vibration transmitted from the housing 2 to the floor 1 can be significantly reduced by the action of the vibration absorbing member 20 based on the vibration of the housing 2 that is a speaker box. That is, the coiled vibration absorbing member 20 has a sufficient length (several times or more) compared to the apparent length L shown in the drawing when it is stretched. Thus, the housing 2 is supported, and the housing 2 is supported as if it was suspended in the air with an elongated rod-shaped body. Therefore, the vibration attenuation rate in the middle of the vibration transmission path becomes longer as the vibration transmission path becomes longer.
[0021]
In addition, since the vibration absorbing member 20 has a cushioning property (elasticity) that is balanced in terms of weight, the vibration absorbing member 20 has a fulcrum in the correlation between the resonance frequency and vibration energy of the entire housing 2 and the fulcrum. The vibration of the housing 2 itself is reduced by almost eliminating the action. Therefore, a good vibration absorbing effect is exhibited also from this point. As a result, it is possible to improve the modulation distortion of the acoustic system and reduce the vibration of the floor so that it can be brought to an epoch-making clear sound.
[0022]
Considering further about such a vibration absorbing action, the individual insulators A that support the casing 2 have appropriate cushioning properties, so that the casing 2 loses a fulcrum for vibration (see FIG. 13). As a result, when the vibration energy of the speaker 4 is received and vibrations exceeding the resonance frequency of the entire housing 2 are received, the housing 2 itself hardly moves. The case 2 tries to move if vibration below the resonance frequency is applied, but generally, the resonance frequency of the case 2 is much lower than the frequency of music reproduction, and actually the case 2 is affected by the vibration plate. Is very rarely experimental. This is because the frequency of music reproduction is about 20 Hz to 30 KHz, the resonance frequency of the housing 2 is at most 10 Hz, and the housing 2 having a large weight (30 kg or more) is about 5 Hz.
[0023]
(Embodiment 2)
FIG. 2 shows another embodiment of the insulator according to the present invention. In the insulator B shown in this embodiment, the support member 10, the vibration absorbing member 20 having the convex portion 21, and the previous embodiment 1 are shown. And the receiving member 30 that eliminates the inclination adjusting mechanism including the adjusting bolt 33. Therefore, the elastic material layer 36 is directly provided on the lower surface of the receiving member 30. In the case of such a configuration, there is an advantage that the configuration can be simplified without reducing the vibration absorbing function.
[0024]
(Embodiment 3)
FIG. 3 shows a preferred embodiment as a relatively small insulator C. The insulator C has the same basic configuration as that shown in the first embodiment. However, considering the small size, the overall height of the receiving member 30 and the base 31 is reduced (thinned). Yes.
[0025]
FIG. 4 shows a state of use of the insulator C shown in the third embodiment, and shows a state in which the housing 2 that is a speaker box is tilted and supported on the front side. As can be understood from the figure, the receiving member 30 can be tilted by adjusting the protruding length of each adjusting bolt 33 from the receiving member 30, whereby the housing 2 can be tilted. Such a use form is very suitable when adjusting so that the sound from the speaker 4 may be directed to the height of the listener's ear.
[0026]
Of course, by adjusting each adjustment bolt 33, it is possible not only to incline to the front side as shown, but also to incline backward or to the left or right as required. In this case, as shown in FIG. 5, since the recess 34 has a spherical shape, the adjustment bolt 33 is allowed to be inclined, and the lower end 33a of the adjustment bolt 33 is firmly attached to the surface of the recess 34. Point support.
[0027]
(Embodiment 4)
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 embedded in the bottom surface 2a portion of the housing 2. FIG. .
[0028]
That is, the insulator D shown here is also basically a columnar or disk-shaped support member 110, a vibration absorbing member 120 having a downward conical convex portion 121, and a columnar or disk-shaped member having the same diameter as the support member 110. And a receiving member 130. However, male screws 111 and 131 are provided on the outer peripheral surfaces of the support member 110 and the receiving member 130, respectively. And this insulator D is made into the structure accommodated by screwing in the accommodation hole 2b with an internal thread provided so that it might open to the bottom face 2a of the housing 2. As shown in FIG.
[0029]
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. A downward conical recess 132 for receiving the convex portion 121 is provided on the upper surface of the receiving member 130.
[0030]
When the insulator D is not used or transported, it can be stored by being screwed into the storage hole 2b as shown in FIG. In this housed state, when the receiving member 130 is screwed, the vibration absorbing material 120 is bent and screwed to such an extent that a slight repulsive force is generated. At the time of use, as shown in FIG. 8, the entire insulator D may be projected and used.
[0031]
Here, since the vibration absorbing member 120 and the receiving member 130 are separate members, it is not always necessary to consider the operability when the insulator D is moved in and out. This is because it is conceivable that the size of the storage hole 2b is so small that it is difficult to insert a finger.
[0032]
The examples shown in FIGS. 9 to 12 consider the operability in such a case. In the case of FIGS. 9 and 10, an operation groove 133 is provided on the bottom surface side of the receiving member 130 so that it can be rotated by, for example, a plus driver, a minus driver, or a similar member. 11 and 12, the operation groove 123 similar to the receiving member 130 is provided at the tip of the convex portion 121 of the vibration absorbing member 120.
[0033]
In each of the above-described embodiments, an example of an insulator in which the main part is made of metal has been shown. However, a member structure such as resin or partially made of metal, resin, or wood may be adopted.
[0034]
In the embodiment, an example in which the housing 2 is a speaker box has been described. However, this housing requires an internal vibration source, for example, an electric washing machine, a refrigerator, or other vibration absorbers. It can also be applied to various devices.
[0035]
【The invention's effect】
As described above, according to the present invention, the vibration absorbing member includes the bearing member that supports the bottom portion of the housing, the receiving member that is placed on the support surface, and the vibration absorbing member that is disposed between the supporting member and the receiving member. Since it consists of the strip | belt-shaped or rod-shaped member which curved itself, and it was set as the structure which carried out the point support with respect to the member at the lower end part, there exist the following effects.
[0036]
When the housing is a speaker box, the mechanical vibration transmission relationship between the speaker box and the support surface such as the floor is separated by lengthening the vibration transmission path in addition to the appropriate cushioning function of the vibration absorbing member, thereby improving modulation distortion The floor vibration can be reduced and the acoustic characteristics can be dramatically improved. Furthermore, in addition to the speaker box, the vibration absorbing function of the housing having the vibration source inside can be improved remarkably.
[0037]
Moreover, the substantial length of the vibration absorbing member can be made sufficiently long by making the vibration absorbing member curved in a coil shape.
[0038]
In addition, 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, so that it can be inclined in any direction. It can be a point support form.
[0039]
Further, by fixing the upper end portion of the vibration absorbing member to the support member via the adhesive layer, the contact between the metals is eliminated, thereby further reducing the vibration noise (friction noise) at the contact portion and further the adhesive. The vibration reduction effect of the layer itself can also be expected.
[0040]
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 exhibited simultaneously.
[0041]
The receiving member includes an inclination adjusting mechanism. The inclination adjusting mechanism is disposed between the base disposed below the receiving member, the base and the receiving member, and an upper end portion is screwed into the receiving member. A plurality of adjustment bolts that can be adjusted in length up and down, and supporting the base with at least three points at the lower end of each adjustment bolt, so that the inclination angle of the housing can be arbitrarily set as required. Can be adjusted.
[0042]
In addition, by providing a spherical recess on the surface of the base that receives the lower end of the adjustment bolt, even if the angle adjustment bolt is tilted, it must be firmly attached so that the mutual contact portions are not overloaded. Can be point-supported.
[0043]
Furthermore, by adopting a configuration in which an elastic material layer is provided 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 Embodiment 2 of the present invention.
FIG. 3 is a front view showing Embodiment 3 of the present invention.
FIG. 4 is a side view of the insulator in use 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 cross-sectional view showing a fourth embodiment of the present invention.
FIG. 8 is a partial cross-sectional view of the insulator according to the present invention in use.
FIG. 9 is a bottom view showing another embodiment of a receiving member according to the present invention.
FIG. 10 is a side view showing another embodiment of a receiving member according to the present invention.
FIG. 11 is a bottom view showing another embodiment of a convex portion according to the present invention.
FIG. 12 is a side view showing another embodiment of a convex portion according to the present invention.
FIG. 13 is an explanatory view showing the operation of the insulator according to the present invention.
FIG. 14 is a side view showing a conventional insulator.
[Explanation 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 Cavity 20, 120 Damping member 21, 121 Protrusion 30, 130 Receiving member 30a Weight member 31 Base 32, 132 Recess 32a Screw Hole 33 Adjustment bolt 33a Lower end 34 Recess 35, 36 Elastic material layer 123, 133 Operation grooves A, B, C, D Insulator

Claims (5)

An insulator for absorbing vibrations of a casing by being arranged between a casing having a vibration source inside and a support surface supporting the casing,
A support member for supporting the bottom of the housing;
A receiving member placed on the support surface;
Including a vibration absorbing member disposed between the support member and the receiving member,
The vibration absorbing member is curved in a coil shape, and a downward conical convex portion is provided at the lower end of the vibration absorbing member ,
On the upper surface of the receiving member, a downward conical concave portion having an obtuse angle than the convex portion is provided, and the convex portion and the concave portion are point-supported,
The receiving member includes a tilt adjusting mechanism, the tilt adjusting mechanism is disposed between a base disposed below the receiving member, the base and the receiving member, and an upper end portion is screwed into the receiving member. Including a plurality of adjustment bolts that can be adjusted in length vertically.
An insulator characterized in that a spherical recess for receiving the lower end of the adjustment bolt is provided on the surface of the base, and at least three points are supported on the base by the lower end of each adjustment bolt . The vibration-absorbing member is formed by bending a band-shaped or rod-shaped member into a coil shape,
The vibration absorbing member has a deflection amount obtained by dividing the deflection dimension, which is the amount of deflection of the vibration absorbing member by placing the casing on the support member, by the original length of the vibration absorbing member, to be approximately 10%. The insulator according to claim 1, wherein the insulator is set as follows . The insulator according to claim 1 or 2, wherein an upper end portion of the vibration absorbing member is fixed to the support member via an adhesive layer . The insulator according to any one of claims 1 to 3, wherein 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 . The insulator according to claim 4 , wherein an elastic material layer is provided on a lower surface side of the base .

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