JPH0635588Y2 - Speaker box structure - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention relates to a speaker box. In detail, it is possible to improve the strength of the speaker box and prevent chattering of the box body due to reproduced sound. At the same time, it relates to the structure of a speaker box that is easy to assemble.

(B) Conventional technology Conventionally, a speaker box (or enclosure)
Is a wood box such as sawn wood, veneer / core plywood, lumber / core plywood, particle board, etc. used to form each side of the speaker box, or a resin box such as ABS resin is used to mold the speaker box. There are various kinds of materials and shapes such as things.

(C) Problems to be solved by the invention The sound radiated from the speaker includes not only direct radiated sound from the speaker diaphragm but also radiated sound due to vibration of the speaker box (so-called box noise). The radiated sound caused by the vibration of this speaker box has a level difference of about 20 dB or more in sound pressure level compared with the direct radiated sound level of the speaker diaphragm. Is.

Generally, in acoustic instruments such as guitars and violins, the resonance of the instrument itself gives the sound a glossy tone, producing a rich resonance. However, on the contrary, in the speaker, from the essence of reproducing the original sound, it is not preferable that the speaker box vibrates as described above. On the other hand, on the other hand, there is an idea to make the speaker box vibrate at a low frequency to make good use of the box sound, but basically it is necessary to suppress the sound emission due to the vibration of the speaker box as much as possible.

Therefore, in order to suppress the vibration of the speaker box, a material with good damping vibration characteristics of the material itself is suitable for forming the speaker box, but from the standpoint of manufacturing the speaker box, the speaker box is made of wood. The speaker box is inevitably expensive in terms of cost and many manufacturing processes. For this reason, a lot of speaker boxes made of resin are used in general mini stereo components and the like.

In addition to the above-mentioned sounding of the box, what often happens in such a resin-molded speaker box is the joint part between the constituent surfaces of the speaker box (the joint part between the front plate and the rear box or the front box and the rear plate). It is the problem of chattering noise at the joints with). This chattering sound has a greater effect on the reproduced sound than box sound,
There are adverse effects such as muddy playback sound, and it is annoying even at a lower level than the box noise. In order to suppress chattering noise, it is required to eliminate the gap at the joint as much as possible and to make the speaker box material hard and difficult to vibrate,
Sufficient consideration is also required for the structure of the joint.

(D) Means for Solving the Problems In order to solve the above problems, according to the present invention, a speaker box is provided on one surface, and a front box having an open surface on the other side different from the surface and a front box. Is an open surface and is attached to the front box so that the open surface faces the open surface of the front box, and one end is fixed on the inner surface of the front box and the open surface A connecting plate extending toward the front box and the front box by connecting one surface to the front box via the connecting plate and the rear box on the surface opposite to the surface. A reinforcing frame for connecting and reinforcing the inner wall of each box at the connecting portion of the front box and the rear box to reinforce and maintain airtightness. It is intended to propose cents structure of peak car box.

(E) Operation Since the configuration is as described above, the front box and the rear box are firmly connected by the connecting plate and the reinforcing frame, and the reinforcing frame enhances the airtightness at the connecting portion and warps or deforms each box. To prevent.

(F) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the structure of a speaker box (1), which is formed by connecting a front box (2) and a rear box (3) to each other. A speaker unit (4) is attached to the front part (2a) of (2). The rear box (3) is provided with holding ribs (3a) ... and bosses (3b) ... on its inner surface, and holes (3c) are formed in the bosses (3b). Has been done. (5)
Reference numeral (5) is a connecting plate for connecting the front box (2) and the rear box (3). The connecting plates (5) (5) are provided with bent portions (5a) ... At both ends thereof, and positioning holes (5) are formed at the bent portions (5a).
b) ..., first screw hole (5c) ... and second screw hole (5d) ...
Are formed. Further, among the bent portions (5a) provided at both ends of the connecting plates (5) (5), the bent portion (5a) provided at one end is the front box (2). Front part (2
It is screwed to the boss (2b) ... formed on the back surface of a). Next, (6) is a reinforcing frame, and the reinforcing frame (6) is for connecting the front box (2) and the rear box (3) through the connecting plates (5) and (5). is there. Then, the convex portions (6b) ... Which engage with the positioning holes (5b) formed in the bent portions (5a) of the reinforcing plates (5) (5), the first
Screw holes (6c) ..., Second screw holes (6d) (6d), and cross-shaped reinforcing ribs (6e) are formed.

The assembling process of the speaker box (1) of the present invention having the above-mentioned structure will be described. First, the speaker unit (4) is attached to the front box (2). Then, connect the connecting plates (5) (5) to the front part (2) of the front box (2).
After fixing to the bosses (2b) formed on the back side of a) with screws, attach the reinforcing frame (6). At this time, the positioning holes (5) of the connecting plates (5) (5) are formed in the convex portions (6b) of the reinforcing frame (6).
b) ... are attached so that they engage with each other, and screws (7) and (7) are inserted through the second screw holes (6d) and (6d) of the reinforcing frame (6) to connect the connecting plates (5) and (5). Fasten to the 2nd screw hole (5d) ... As a result, the connecting plates (5) and (5) are positioned, so that the connecting plates (5) and (5) are prevented from falling inward.
After mounting the reinforcing frame (6), mount the rear box (3), and finally insert the screws (8) ... through the holes (3c) of the bosses (3b) ... of the rear box (3). Then, they may be fastened to the first screw holes (6c) of the reinforcing frame (6) and the second screw holes (5c) of the front box (2).

Next, the state of the connecting portion of the front box (2) and the rear box (3) will be described in detail with reference to FIG. In the figure, the reinforcing frame (6) is screwed to the connecting plate (5) screwed to the front box (2). Further, the outer frame portion (6f) of the reinforcing frame (6) is clamped by the holding ribs (3a) formed on the inner surface of the rear box (3). For this reason, the airtightness at the connecting portion is improved, and even in a closed type speaker, the air inside the speaker box (1) leaks and acoustic air
The suspension effect is not impaired. Also, such a connecting portion is likely to have a gap due to warpage or distortion due to aging of the front box (2) and the rear box (3), but this is caused by the cross-shaped reinforcing rib (6e) in the reinforcing frame (6). Is being prevented. And the connecting plate (5) (5)
Also, since the front box (2) and the rear box (3) are connected by the reinforcing frame (6), the front and rear boxes are firmly connected, and the speaker box (1) produces a chattering sound during playback. , To prevent unnecessary box noise. Further, in the case of a speaker box having a depth like the present invention, when it is difficult to directly connect the front box (2) and the rear box (3) with a boss (there is a problem such as bending of the boss self-confidence). Is an effective method.

(G) Effect of the Invention As described above, according to the present invention, the speaker unit is provided on one surface, and the front box having the open surface on the other side, and the open box on the other side. A rear box attached to the front box so that the open surface faces the open surface of the front box, and one end fixed to the inner surface of the front box and extending toward the open surface. A plate, one surface of which is connected to the front box via the connecting plate, and the rear box is connected on the surface opposite to the surface, thereby connecting the front box and the rear box, and Since a reinforcing frame which supports and reinforces the inner wall of each box at the connecting portion of the front box and the rear box and maintains airtightness is provided, the front portion is provided by the connecting plate and the reinforcing frame. The box and the rear box are firmly connected to each other to prevent chattering noise and unnecessary box noise that are likely to occur in a conventional resin-molded speaker box, and the reinforcing frame prevents warping and deformation of each box at the connecting part. By maintaining the airtightness, it is possible to prevent deterioration of the airtightness of the speaker box, which is extremely useful in practice.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a structure of a speaker box according to the present invention, and FIG. 2 is a sectional view showing a structure of a connecting portion of a front box and a rear box. (1) …… Speaker box, (2) …… Front box, (3) …… Rear box, (5) (5) …… Connecting plate, (6) …… Reinforcing frame.

Claims (1)

[Scope of utility model registration request] 1. A front box in which a speaker unit is provided on one surface and another surface different from the surface is an open surface, and one surface is an open surface and the open surface is the front box. A rear box attached to the front box so as to face the open surface of the front box, a connecting plate having one end fixed to the inner surface of the front box and extending toward the open surface, and one surface through the connecting plate. The front box and the rear box are connected by connecting the front box with the front box and the surface opposite to the front box, and each of the front box and the rear box is connected. A speaker box structure characterized by having a reinforcing rib for supporting and reinforcing the inner wall of the box and a reinforcing frame for maintaining airtightness.