JPH0735515Y2 - Speaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a speaker, which is a type of audio equipment.

(Prior Art) There are various types of loudspeakers. Among them, in a loudspeaker such as a dome type tweeter, for example, a low frequency Q control and a band balance control are performed as shown in FIG. As shown in FIG. 4, a through hole 11b 'is provided in the center of the center pole 11a', and a part of the back pressure of the diaphragm 2'is passed through the braking material or the dustproof cloth 9'provided in the through hole 11b '. I try to escape to the back air chamber of S '.

(Problems to be solved by the invention) However, in the speaker S'provided with the through hole 11b 'in the center portion of the center pole 11a' of the yoke 11 ', the manufacturing is complicated and the processing cost is high, and the cost is high. There was a problem of becoming.

Further, in the above-mentioned conventional example, since the back pressure of the diaphragm 2'is released only through the through hole 11b 'provided in the lower central portion of the diaphragm 2'and the braking material provided therein, the braking balance is improved. There was a problem that was bad.

The present invention has been proposed in view of the above circumstances, and an object thereof is to provide a speaker that is easy to manufacture, minimizes costs, and has a good braking balance.

(Means for Solving the Problem) In the present invention, a diaphragm assembly 1 having a diaphragm 2, a voice coil 3, and the like, and a diaphragm outer peripheral portion of the diaphragm assembly 1 are fixed and made of a resin molded product. A diaphragm ring 5 having a guide groove 5a for centering the diaphragm assembly 1, and the diaphragm ring 5
Is provided on the upper surface thereof, and a gap g for releasing a part of the back pressure of the diaphragm 2 is formed on the lower surface of the diaphragm ring 5, and the sound absorbing material 9 is provided in a part or all of the gap g. The above-mentioned object is achieved by providing the gap g below the outer periphery of the diaphragm edge.

(Operation) In the present invention, first, the diaphragm ring 5 for fixing the diaphragm assembly 1'and the dowel 7b of the plate 7 are fitted to center the diaphragm assembly 1 ', that is, the center of the diaphragm 2'. Since it is performed, the assembling work is easy and the center can be easily set.

In addition, a gap g is provided between the diaphragm ring 5 and the plate 7.
Since the sound absorbing material 9, that is, the braking material is provided in this gap portion and the gap g and the braking material are located below the outer periphery of the diaphragm edge, braking is applied substantially uniformly over the entire circumference. Therefore, an excellent braking balance can be obtained.

(Embodiment) FIGS. 1 to 3 show an embodiment of the present invention.
FIG. 1 is a half sectional view of the speaker S, FIG. 2 is an enlarged view of a portion A in FIG. 1, and FIG. 3 is an enlarged sectional view of other portions.

Thus, in the drawings, reference numeral 1 denotes a diaphragm assembly including a diaphragm 2 and a voice coil 3 adhered to a lower central portion thereof, 4 is an edge of an outer periphery of the diaphragm, and 5 is an outer periphery of the diaphragm assembly. 1 is a diaphragm ring having a guide groove 5a for fixing and centering it, and is preferably formed of a resin mold. Reference numeral 6 denotes a frame provided above the frame 6.
The diaphragm ring 5 holds and fixes the outer periphery of the edge 4 on the outer periphery of the diaphragm.

Further, 7 is a plate having a tap hole 7a, and a screw 8
Thus, the frame 7, the diaphragm ring 5, the plate 7 and the like are integrated. In this case, a dowel 7b that fits with the concave guide groove 5a of the diaphragm ring 5 is provided on a part of the upper surface of the plate 7, and the outer peripheral side 7b 'of the dowel 7b contacts the outer peripheral side 5a' of the guide groove 5a. If the screw 8 is tightened in the contact state, the diaphragm ring 5 for fixing the diaphragm assembly 1 can be easily set at a predetermined position, and the diaphragm assembly 1 can be easily centered.

Therefore, in the present invention, a gap g is formed between the upper surface of the plate 7 and the lower surface of the diaphragm ring 5 provided above it.
And a storage portion 5b for storing the sound absorbing material 9 which functions as a damping material is formed in the inner portion of the gap g, that is, the inner portion of the diaphragm ring 5.

In this case, the gap g is formed on the entire outer circumference of the diaphragm 2,
Sound absorbing material storage part so as to cover a part or all of the gap g
The sound absorbing material 9 is stored in 5b.

In addition, in FIG. 1, 10 is a cover, 11 is a yoke, 11a is a center pole, 12 is a magnet, and the boss coil 3 is arranged in the magnetic gap.

Therefore, in this embodiment, when a voice current is applied to the boss coil 3 to vibrate the diaphragm 2, a back air gap g is formed below the outer periphery of the diaphragm edge, and the sound absorbing material 9 provided there. Since a part of the back pressure of the diaphragm is released via the diaphragm, the diaphragm 2 is braked almost uniformly over the entire circumference, and the braking balance is improved.

In addition, although a speaker such as a dome type tweeter has been described in the above embodiment, a similar configuration can be adopted for a squawker for medium sound and a driver unit of a type having a horn, and a similar operation can be obtained.

(Effect of the Invention) Generally, since the diaphragm ring 5 is made of a resin molded product, a slightly complicated shape can be created without any problem. In the present invention, the diaphragm assembly 5 is attached to the diaphragm assembly 1.
In addition to mounting and centering with the plate 7, a gap g for releasing a part of the back pressure of the diaphragm and a sound absorbing material storage portion 5b are formed. Thus, in the present invention, all of the diaphragm ring 5 is formed. Since the other parts do not need to be specially processed, the assembly is easy and the cost can be minimized.

Further, since the gap g for releasing a part of the back pressure of the diaphragm is provided on the lower side of the outer periphery of the diaphragm edge, the braking is applied almost uniformly over the entire circumference, and the braking balance is good.

[Brief description of drawings]

FIG. 1 is a half sectional view of a speaker according to an embodiment of the present invention, FIG. 2 is a partially enlarged sectional view of the same as above, FIG. 3 is an enlarged sectional view of other portions, and FIG. 4 is a conventional example. 1 ... vibration plate assembly, 2 ... vibration plate, 3 ... voice, 4 ... vibration plate outer edge, 5 ... diaphragm ring, 5a ... guide groove, 6 ... frame, 7 ... plate, 7b ...... Dowel, 9 ... Sound absorbing material, g ... Void.

Claims (1)

[Scope of utility model registration request] 1. A vibrating plate assembly having a vibrating plate, a voice coil, and the like, a vibrating plate outer peripheral portion of the vibrating plate assembly being fixed, and a guide groove for centering the vibrating plate assembly, which is made of a resin molded product. The diaphragm ring has a plate and the diaphragm ring has an upper surface on which a plate is provided. On the lower surface of the diaphragm ring, a gap is formed to release a part of the back pressure of the diaphragm. A speaker characterized in that a material is provided and a void is provided below the outer periphery of the diaphragm edge.