JP3157777B2 - Speaker mounting bracket for speaker cabinet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a speaker mounting bracket for a speaker cabinet.

[0002]

2. Description of the Related Art FIG. 4 is a front view of a conventional speaker cabinet. A speaker mounting opening is provided in a front baffle (front panel) 11 of the speaker box 1 having a closed rectangular box shape, and a speaker 2 such as a wafer or a tweeter is provided in the speaker mounting opening from the front side.
3 into the front ends (front ends) 211 and 311 of the speaker frames of the speakers 2 and 3.
The speaker 2 is fixed to the front baffle 11 by fastening a screw (not shown) to the front baffle 11 through the play holes 213 and 313 for fastening.

[0003]

However, in the above-mentioned conventional speaker device, a vibration force in the front-rear direction is generated in the speaker frame of the speaker 2 as a reaction of the vibration of the cone 22 of the speaker 2, and the vibration force is generated by the speaker. There is a problem that the sound is transmitted from the front end portion 211 of the frame to the front baffle 11 to vibrate the front baffle 11 and deteriorate the speaker performance.

[0004] By increasing the thickness of the front baffle 11,
It is easy to increase the rigidity and mass and reduce the vibration of the front baffle 11, but as a result, even the weight of the heavy speaker cabinet 1 is significantly increased, and handling such as transportation and the speaker cabinet 1 There is a problem that it becomes difficult to fix the device when it is installed on a wall surface.

It is also conceivable to attach a weight to the speaker frame of the speaker 2. However, it is necessary to machine a screw hole or the like in the speaker frame. At this time, there is a possibility that a speaker cone or the like may be damaged by vibration. At some point, the speaker 2 becomes heavy and the front baffle 11
There is a problem that it becomes difficult to mount the speaker on the front baffle 11, the rotational moment of the speaker 2 acting on the front baffle 11 increases, and the reflected wave characteristic in the speaker cabinet 1 deteriorates.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made to reduce the weight of a speaker cabinet and to reduce the vibration of a front baffle, and to suppress the increase in cost and labor required for mounting the speaker cabinet. Providing metal fittings is an issue to be solved.

[0007]

According to a first aspect of the present invention, there is provided a speaker cabinet for a speaker cabinet according to the first aspect of the present invention, wherein the speaker mounting bracket is formed of a high-specific-gravity metal material, and is located behind a front end of a speaker frame. A tubular portion having a front end surface that can be in close contact with the outer peripheral surface, and a fixed plate portion that extends radially outward from the rear end of the tubular portion so as to be in intimate contact with the inner surface of the front baffle of the speaker cabinet having a closed rectangular box shape. A screw hole provided in the distal end surface of the tubular portion for fixing the distal end portion of the speaker frame to the distal end surface of the tubular portion, and the fixing for fixing the fixing plate portion to the inner surface of the front baffle. And a hole provided in the plate portion.

More specifically, the speaker mounting bracket has a substantially flange shape, and a fixing plate portion forming the flange is fastened to the inner surface of the front baffle by a screw. Then, the front end portion (front end portion) of the speaker frame is fastened to the front end surface (front end surface) of the tubular portion of the speaker mounting bracket with a screw. With this configuration, the following operation and effect can be obtained.

First, since the weight of the front baffle is increased by the weight of the speaker mounting bracket made of a high-specific-gravity metal material and having a large weight, the front baffle vibration damping property is improved. In addition, the improvement in the front baffle vibration damping property by the weight increase according to the present configuration is much more effective per unit weight than the weight increase of the front baffle itself.

[0010] That is, the largest displacement (amplitude) of the front baffle is the portion to which the speaker mounting bracket is attached. By selectively increasing only the weight of this portion, the speaker device has a slight displacement (amplitude). A large front baffle vibration damping effect can be obtained due to the increase in weight. Also, this speaker mounting bracket
The fixing plate is fixed to the back of the front baffle, and
Since the distal end surface of the cylindrical portion is hidden by the distal end portion of the speaker frame, the appearance does not deteriorate.

Furthermore, since the shape of the speaker mounting bracket is simple, manufacturing is easy and cost increase is small.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the following examples. Examples of high specific gravity metal materials include iron, alloys containing iron as a main component, bronze, and copper having a specific gravity of 5%.
It is preferable to use a metal material having a melting point equal to or lower than the melting point of iron.

[0013]

Embodiment 1 An example of a speaker cabinet using the speaker mounting bracket of the present invention will be described below. FIG. 1 is a cross-sectional view of a main part of the speaker device, and FIG. 2 is a front view of a speaker mounting bracket 4 which is a feature of the present embodiment.

A speaker 2 and a speaker mounting bracket 4 are provided on a front baffle 11 of the speaker cabinet 1 having a rectangular box shape. Front baffle 1
1 is provided with a speaker mounting opening 12,
The speaker 2 is inserted into the speaker mounting opening 12 from the front side.
Is inlaid. The speaker 2 has a speaker frame 21 that supports a cone 20 and a coil unit (not shown) that drives the cone 20, and four free play holes (not shown) are provided at a front end 211 of the speaker frame 21. ing.

The front baffle 11 has a speaker mounting bracket 4 comprising a ring-shaped tubular portion 41 and a fixed plate portion 42 which is a quadrangular flange having an outer shape larger than the tubular portion 41.
Are fixed, and the tubular portion 41 is fitted into the speaker mounting opening 12. 413 is an inner peripheral surface of the cylindrical portion 41 and the fixed plate portion 42. The tube part 41 is a speaker frame 2
A front end surface 411 that can be in close contact with the back outer peripheral surface 2111 of the wheel-shaped end portion 211 is provided with four screw holes 412 as shown in FIG. A screw (not shown) is screwed into the screw hole 412 through the above-mentioned play hole for fastening of the speaker frame 21.
The speaker frame 21 is fixed to the speaker mounting bracket 4.

The fixed plate portion 42 has a front end face 422 that is in close contact with the inner surface 111 of the front baffle 11 and extends radially outward from the rear end of the cylindrical portion 41. The fixed plate portion 42 is provided with a total of four holes 421, and the fixed plate portion 42 is fixed to the front baffle 11 by screws passing through the holes. The speaker mounting bracket 4 is made of high carbon cast iron having a carbon content of 3 to 4 wt%.

The above-described speaker cabinet 1 of the present embodiment employs a structure in which the speaker frame 21 is fixed to the front baffle 11 via the speaker mounting bracket 4, so that an increase in the weight of the speaker device is suppressed while the front baffle is suppressed. 11 can be reduced, and an increase in cost and installation time can be suppressed. More specifically, since the weight of the front baffle 11 is increased by the weight of the speaker mounting bracket 4 formed of cast iron and having a large weight, the front baffle vibration damping property is improved.
The improvement in the front baffle vibration damping property by the increase in weight according to the present configuration is much more effective per unit weight than when the weight of the front baffle 11 itself is increased.

That is, among the respective parts of the front baffle 11, the largest displacement (amplitude) is caused by the speaker mounting opening 1 to which the speaker mounting bracket 4 is mounted.
2, by selectively increasing only the weight of this portion, it is possible to obtain a large vibration damping effect of the front baffle 11 by slightly increasing the weight of the speaker device.

Further, since the fixing plate 42 is fixed to the inner surface 111 of the front baffle 11 and the distal end surface 411 of the cylindrical portion 41 is hidden by the distal end 211 of the speaker frame 21, Does not decrease. In addition, since the shape of the speaker mounting bracket 4 is simple, the manufacture is easy and the cost increase is small.

Further, since the speaker mounting bracket 4 is made of high carbon cast iron having a carbon content of 3 to 4% by weight, preferably 3.8% by weight, it is possible to achieve a sound absorbing heat conversion effect as well as an increase in weight. Further, the vibration of the front baffle 11 can be reduced without requiring modification of the speaker 2, and it is easy to use the existing speaker cabinet.

[0021]

Embodiment 2 Another example of a speaker cabinet using the speaker mounting bracket of the present invention will be described below. However,
Components having the same main functions as those of the conventional speaker cabinet shown in FIG. 4 and the speaker cabinet of the first embodiment are denoted by the same reference numerals. In addition, the front shape of this speaker cabinet is the same as FIG.

FIG. 3 is a longitudinal sectional view of a main part of the speaker cabinet. Reference numeral 1 denotes a speaker cabinet 1 having a closed rectangular box shape.
Only one is shown. A speaker mounting opening 12 is provided in the front baffle 11, and the speaker 2 is fitted into the speaker mounting opening 12 from the front side.

The speaker 2 has a speaker frame 21 which supports a cone 20 and a coil portion (not shown) for driving the cone 20. A front end portion 211 of the speaker frame 21 has four fastening members. A play hole 213 is provided. The front baffle 11 has a cylindrical portion 41 and a cylindrical portion 4.
A speaker mounting bracket 4 composed of a fixed plate portion 42 which is a cylindrical portion having an outer shape larger than 1 is fixed, and the cylindrical portion 41 is fitted into the speaker mounting opening 12. 43 is an inner peripheral surface of the cylindrical portion 41 and the fixed plate portion 42.

The cylindrical portion 41 has a distal end surface 411 that can be in close contact with the outer peripheral surface 2111 on the rear side of the annular plate-shaped distal end portion 211 of the speaker frame 21. The distal end surface 411 has four screw holes 41.
2 are provided. A screw (not shown) is screwed into the screw hole 412 through the fastening play hole 213 of the speaker frame 21 described above.
1 is fixed to the speaker mounting bracket 4.

The fixing plate 42 has a front end face 422 having an inner surface 11 of the front baffle 11 of the speaker cabinet 1.
1 and extends radially outward from the rear end of the cylindrical portion 41. The fixed plate portion 42 is provided with a total of four holes 421, and the fixed plate portion 42 is fixed to the front baffle 11 by screws penetrating these holes. 44 is the hole 42
1 is a shaving recessed portion. Speaker mounting bracket 4
Consists of high carbon cast iron having a carbon content of 3-4 wt%.

The speaker device of the present embodiment described above
Speaker frame 21 via speaker mounting bracket 4
Is fixed to the front baffle 11, the vibration of the front baffle 11 can be reduced while suppressing the weight increase of the speaker cabinet, and the cost and the labor for mounting can be suppressed. More specifically, since the weight of the front baffle 11 is increased by the weight of the speaker mounting bracket 4 formed of cast iron and having a large weight, the front baffle vibration damping property is improved. The improvement in the front baffle vibration damping property by the increase in weight according to the present configuration is much more effective per unit weight than when the weight of the front baffle 11 itself is increased.

That is, among the parts of the front baffle 11, the largest displacement (amplitude) is caused by the speaker mounting opening 1 in which the speaker mounting bracket 4 is mounted.
2, by selectively increasing only the weight of this portion, it is possible to obtain a large vibration damping effect of the front baffle 11 by slightly increasing the weight of the speaker device.

Further, in this speaker mounting bracket 4, the fixing plate portion 42 is fixed to the back surface 111 of the front baffle 11, and the front end surface 411 of the cylindrical portion 41 is hidden by the front end portion 211 of the speaker frame 21, so that the appearance is beautiful. It does not drop. In addition, since the shape of the speaker mounting bracket 4 is simple, the manufacture is easy and the cost increase is small.

Further, since the speaker mounting member 4 is made of high carbon cast iron having a carbon content of 3 to 4% by weight, preferably 3.8% by weight, it is possible to achieve a sound absorbing heat conversion effect as well as an increase in weight. Further, the so-called box squeal, that is, the vibration of the front baffle 11 can be reduced without requiring modification of the speaker 2, and it is easy to use the existing speaker cabinet.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a speaker cabinet using a speaker mounting bracket of a first embodiment.

FIG. 2 is a front view of the speaker mounting bracket 4 shown in FIG.

FIG. 3 is a longitudinal sectional view of a main part of a speaker cabinet using the speaker mounting bracket of the second embodiment.

FIG. 4 is a front view of a conventional speaker device.

[Explanation of symbols]

1 is a speaker cabinet, 2 is a speaker, 4 is a speaker mounting bracket, 11 is a front baffle, 21 is a speaker frame, 41 is a cylindrical portion, 42 is a fixed plate portion, 412 is a screw hole, and 421 is a hole.

Claims (1)

(57) [Claims] 1. A tubular portion having a front end surface capable of closely contacting an outer peripheral surface on a back side of a front end portion of a speaker frame, and a rear end of the tubular portion capable of closely contacting an inner surface of a front baffle of a closed rectangular box-shaped speaker cabinet. A fixing plate portion extending radially outward; a screw hole provided in a distal end surface of the cylindrical portion for fixing a distal end portion of the speaker frame to a distal end surface of the cylindrical portion; And a hole provided in the fixing plate portion for fixing to the inner surface of the baffle; and a speaker mounting bracket for a speaker cabinet, wherein the speaker mounting bracket is formed of a high specific gravity metal material.