JPH06253381A - Box type speaker - Google Patents

Abstract

PURPOSE:To save a metallic material, to reduce cost, to reduce weight and to save materials by fixing the side of the magnetic circuit part of a speaker unit to the internal edge of a speaker box and fixing the edge of a diaphragm to the opening edge of the speaker box. CONSTITUTION:The speaker unit 1 not provided with a frame is incorporated and fixed in the speaker box 2 behind the diaphragm 3. That is, the magnetic circuit part 5 of the speaker unit 1 is fixed to the internal wall of the speaker box 2 by adhesive and screws, etc., and in the meantime, the edge 4 of the diaphragm 3 of the speaker unit 1 is fixed to the edge of the opening of the speaker box 2. In such a manner, since the magnetic circuit part 5 and the edge 4 of the diaphragm 3 are respectively fixed to the speaker box 2, the diaphragm 3 is supported by the speaker box 2, the frame for blocking the vibration of air is not present between the back surface of the diaphragm 3 and the back cavity of the speaker and thus, faithful reproducing sound can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box type speaker used for audio equipment and the like.

[0002]

2. Description of the Related Art FIG. 8 is a sectional view and a perspective view of a conventional speaker unit, and FIG. 9 is a sectional view showing a structure of a conventional box type speaker. In a conventional speaker unit, as shown in FIG. 8, an inner end of a metal frame 81 is fixed to a yoke 83 forming a magnetic circuit, and a flange portion 85 of the frame 81 is provided with a diaphragm 82 and an edge 84. It has a structure in which it is bonded and fixed via.

Then, as shown in FIG. 9, this speaker unit is inserted from the opening of the speaker box 91, and the flange portion 85 of the frame 81 is screwed into the speaker box 91.
The box type speaker is completed by fixing at 92.

[0004]

Since the diaphragm 82 has a weak mechanical strength, the outer periphery of the diaphragm 82 is connected to the flange portion 85 of the metal frame 81 through the edge 84 as shown in FIG. 8 (a). By fixing the diaphragm 82, the diaphragm 82 contributes to support the entire diaphragm 82 so that the diaphragm 82 efficiently reproduces sound. Also,
As shown in FIG. 9, the magnetic circuit unit 86 is attached to and supported by the speaker box 91 via the metal frame 81.

However, as shown in FIG. 8 (b), although the frame 81 is formed of a considerable metal material so as to cover the entire diaphragm 82 from the back side, it reproduces sound from an electric signal. It does not contribute as a speaker function.

[0006] By the way, even in the case of a box-type speaker mounted on a vehicle, it is desired that the box speaker is as light as possible in order to save fuel consumption of the vehicle. Further, in a box-type speaker other than that for in-vehicle use, it is desirable to reduce the number of parts in terms of cost reduction and weight reduction. Furthermore, in recent years, material saving has been strongly desired not only from the economical viewpoint of cost reduction but also from the viewpoint of effective utilization of limited resources.

Considering such a situation, the conventional speaker unit frame as described above uses a large amount of metal material to support a heavy magnetic circuit portion, but is not suitable for sound reproduction. Since it does not contribute directly, improvement is desired.

The technical problem of the present invention is to pay attention to such a problem, and in the box-type speaker, by improving the structure thereof, the metal material is reduced to reduce the cost, reduce the weight, and save the material. Is to realize.

[0009]

FIG. 1 is a sectional view, a perspective view and a partially cutaway perspective view showing a first embodiment of a box type speaker according to the present invention. According to the box type speaker of claim 1, a speaker unit 1 having a structure in which a frame is not provided on the back of the diaphragm 3 as shown in FIG.
Is attached to the edge of the opening of the speaker box 2, and the magnetic circuit section 5 side of the speaker unit 1 is fixed to the inner wall of the speaker box 2.

The box type speaker according to claim 2 is shown in FIGS.
As illustrated in FIG. 5, the magnetic circuit section 5 of the speaker unit 1 is fixed to the inner wall of the speaker box 2 via a support base.

[0011]

In the box-type speaker of claim 1, the magnetic circuit portion 5 side of the speaker unit 1 is fixed to the inner wall of the speaker box 2, and the edge 4 of the diaphragm 3 of the speaker unit 1 is fixed to the speaker box 2. Since it is fixed to the edge of the opening, the speaker box 2 supports the outer peripheral side of the diaphragm 3 of the speaker unit 1, instead of the conventional speaker frame. The heavy magnetic circuit portion is directly supported on the inner surface of the speaker box.

Therefore, according to the present invention, the diaphragm of the speaker unit and the speaker frame for supporting the magnetic circuit portion are not required, and the cost can be reduced by saving the metal material.
Fuel economy is reduced by weight reduction.

In the box-type speaker according to the second aspect, since the magnetic circuit section 5 of the speaker unit 1 is fixed to the inner wall of the speaker box 2 with the support base sandwiched therebetween,
The depth of the speaker box can be ensured to be wider than the depth of the speaker unit, the resonance space (back cavity) is expanded, and better sound reproduction can be performed.

[0014]

EXAMPLE Next, a box type speaker according to the present invention is
An actual example will be used to explain how this is embodied. 1 is a sectional view, a perspective view and a partially cutaway perspective view for explaining a first embodiment of the present invention, and FIG. 2 is a sectional view and a perspective view of a speaker unit having no speaker frame according to the present invention. .

As shown in FIG. 2, the support plate 23 is a diaphragm 21.
So that the voice coil 26 that drives
This is for supporting the damper 22, and in a structure without the damper 22, the support plate 23 is also unnecessary. Needless to say, a frame that covers the back surface of the diaphragm 21 and supports the diaphragm 21 as in the related art is unnecessary. And
The magnetic circuit section 5 including the magnet 24 and the yoke 25 is fixed to the speaker box 2 by adhesion, screwing, or the like.

As described above, the speaker unit 1 having no frame on the back of the diaphragm is built in and fixed to the speaker box 2 shown in FIG. That is, the speaker box 2
The magnetic circuit portion 5 of the speaker unit 1 is fixed to the inner wall of the speaker unit 1, while the edge 4 of the diaphragm 3 of the speaker unit 1 is fixed to the edge of the opening of the speaker box 2.

As described above, since the magnetic circuit portion 5 and the edge 4 of the diaphragm 3 are separately fixed to the speaker box 2, the diaphragm 3 is supported by the speaker box 2 and vibrates. Since there is no frame that interferes with air vibrations between the back surface of the plate 3 and the back cavity of the speaker, a faithful reproduced sound can be obtained.

Since the edge 4 of the diaphragm 3 further projects from the front surface of the speaker box 2, a protective member 6 higher than the edge 4 is attached around the edge 4 so as not to crush the edge 4 by contact or the like. Is preferred.

Since the heavy magnetic circuit portion is directly attached and fixed to the inner surface of the speaker box, the total load of the speaker unit is not concentrated on the opening edge of the speaker box as in the conventional case. It is preferable to use resin as the material of the speaker box 2 for vehicle use. When the speaker box 2 is made of resin, the box shape as shown in FIG. 1 cannot be formed at one time under the present circumstances, so that the speaker box 2 is divided by the side surfaces and integrally joined by vibration welding or the like.

FIG. 3 is a sectional view for explaining the second embodiment of the present invention. In the structure of the first embodiment, since the depth of the speaker box is determined by the depth of the speaker unit, there is a limit to widen the resonance space of the speaker box. Therefore, in this embodiment, a separate support base 33 is adhesively fixed to the inner wall of the speaker box 32, and the magnetic circuit side of the speaker unit 31 is adhesively fixed to the support base 33.

With such a structure, by increasing the height of the support base 33, the depth of the speaker box 32 can be increased, and as a result, the resonance space of the speaker box 32 is widened and the sound quality is improved. it can. Fig. 3 (b)-(e)
FIG. 6 is a perspective view showing various examples of the support base 33, and FIG.
As described above, it is preferable that the support base 33 has as wide a joint surface as possible with the magnetic circuit portion of the speaker unit.

However, if it is desired to reduce the weight or the amount of materials used, it is possible to reduce the diameter as shown in FIG. 6C or to provide a cavity as shown in FIG. Is. Further, when the speaker unit 32 is made of wood or the like, the material can be effectively used by using the end material to form each cylindrical structure as shown in FIG.

FIG. 4 is a sectional view for explaining the third embodiment of the present invention, showing another means for ensuring a wide resonance space of the speaker box. When the speaker box is formed of resin, the shape can be formed relatively freely, so that the support base can be integrally formed with the speaker box as shown in FIG.

That is, the support base 33 in FIG.
It is integrally molded inside the speaker box as shown in Fig. 4 (a). Alternatively, as shown in FIG. 4B, the thickness of the speaker box is made constant, and the back wall of the speaker box is formed in a convex shape toward the inside. With this structure,
By increasing the height of the protrusions 33a, 33b integrally molded with the speaker box, the depth of the speaker box is increased,
It is possible to widen the resonance space.

FIG. 5 is a sectional view for explaining the fourth embodiment of the present invention. In order to adhere and fix the magnetic circuit section side of the speaker unit, it is necessary to pay attention to the adhering position, adhering time, etc., and the work is complicated. On the other hand, as shown in FIG. 2, a screw hole 28 is formed in the back surface of the magnetic circuit portion of the speaker unit, and the speaker unit is screwed and fixed to the speaker box as shown in FIG.

With such a structure, the fixing position of the speaker unit is determined by the position of the screw hole, the bonding time is not required, and the fixing work becomes easy. When using a separate support base 33, the support base 33 is sandwiched and screwed as shown in FIG. 5 (c).

FIG. 6 is a front view and a side view for explaining the fifth embodiment of the present invention. As shown in (a) of the figure, the protrusion 61
And a vertical recess 63 as shown in FIG.
A so-called bayonet connection is formed by using a member having an inner groove 62 continuous with the recess 63. Now, the protrusion 61 and the groove 63
When the member 64 is rotated to the right after being fitted in, the protrusion 61 slides into the inner groove 62 and is locked to each other as shown in FIG.

If one of such bayonet couplings is provided on the magnetic circuit section side of the speaker unit and the other is fixed to the inner wall of the speaker box in advance, no tool is required for fixing the speaker unit, and the work becomes unnecessary. Will be easier. Further, when the speaker box is made of resin, it is possible to integrally form the projections and grooves for bayonet coupling with the speaker box.

FIG. 7 is a sectional view for explaining the sixth embodiment of the present invention. In the case of the present invention, since the speaker frame does not exist, the diaphragm 21 of the speaker unit may be damaged when the speaker box is deformed by external pressure. However, as in this embodiment, the speaker box
By providing the pillar 71 between the front surface and the back surface inside the inside 32, it is possible to prevent the speaker box from being deformed by external pressure and damaging the diaphragm 21 of the speaker unit. Moreover, since the strength of the speaker box is increased by the support 71, the thickness of the speaker box is reduced,
It is also possible to save materials.

[0030]

According to the box type speaker of the present invention, the magnetic circuit side of the speaker unit is fixed to the inner wall of the speaker box, and the edge of the diaphragm is fixed to the opening edge of the speaker box. Unlike the conventional case, the speaker unit does not require a frame for supporting the diaphragm via the edge or supporting the magnetic circuit section on the speaker box or the like.

As a result, in the box type speaker,
By reducing the metal material used for the frame of the speaker unit, it has become possible to achieve cost reduction, weight reduction, vehicle fuel efficiency reduction, and material savings.

According to a second aspect of the present invention, since the magnetic circuit portion side of the speaker unit is fixed to the inner wall of the speaker box, the support base is sandwiched so that the resonance space is widened, so that better sound reproduction is possible. It becomes possible to do.

[Brief description of drawings]

FIG. 1 is a sectional view, a perspective view and a partially cutaway perspective view illustrating a first embodiment of the present invention.

FIG. 2 is a cross-sectional view and a perspective view illustrating a speaker unit according to the present invention.

FIG. 3 is a cross-sectional view illustrating a second embodiment of the present invention and perspective views showing various embodiments of a support base.

FIG. 4 is a sectional view illustrating a third embodiment of the present invention.

FIG. 5 is a sectional view illustrating a fourth embodiment of the present invention.

FIG. 6 is a front view and a side view showing a fifth embodiment of the present invention.

FIG. 7 is a sectional view illustrating a sixth embodiment of the present invention.

8A and 8B are a sectional view and a perspective view illustrating a structure of a conventional speaker unit.

FIG. 9 is a cross-sectional view illustrating the structure of a conventional box-type speaker.

[Explanation of symbols]

 1 Speaker Unit 2 Speaker Box 3 Vibration Plate 4 Edge 5 Magnetic Circuit Section 6 Protective Member 21 Vibration Plate 22 Damper 23 Support Plate 24 Magnet 25 Yoke 26 Voice Coil 27 Center Cap 28 Screw Hole 31 Speaker Unit 32 Speaker Box 33 Support Base 71 Strut

Claims (2)

[Claims] 1. A speaker unit (1) having a structure having no frame behind the diaphragm (3) is built in a speaker box (2), and an edge (4) of the diaphragm (3) of the speaker unit (1) is incorporated. )
Is attached to the edge of the opening of the speaker box (2), and the magnetic circuit section (5) side of the speaker unit (1) is fixed to the inner wall of the speaker box (2). Speaker. 2. The box-type speaker according to claim 1, wherein the magnetic circuit section (5) of the speaker unit (1) is fixed to the inner wall of the speaker box (2) with a support base sandwiched therebetween. Characteristic box type speaker.