JPH01272300A - Speaker system - Google Patents

Abstract

PURPOSE:To prevent the generation of an abnormal sound in a low pitched tone area by making the rigidity of a standing part of an edge member for connecting a diaphragm to a frame higher than the rigidity of a roll part. CONSTITUTION:The diaphragm 1 and a frame 13 are connected by an internal edge 3 having the standing part 3b in the one end of the roll part 3a. Then, the thickness t2 of the standing part 3b of the internal edge 3 is made thicker than the thickness t1 of the roll part 3a, thereby, the rigidity of the standing part 3b is more highly enhanced than that of the roll part 3b. Accordingly, the diaphragm is moved backward to increase the strength of the standing part 3b to a pressure from the sealing part side of a speaker system and prevent the deformation of the standing part 3b. Thereby, the abnormal sound in the low pitched tone area, high in the amplitude can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a speaker system used in general audio equipment.

[Conventional technology]

In recent years, speaker systems used in general audio equipment are
To save space, it is thin and has a small volume. This makes it difficult for speakers to reproduce deep bass sounds. In order to improve this problem, the structure of the speaker system is such that the rear surface of the speaker diaphragm has both an open part and a sealed part. I will explain.

In this speaker system, as shown in FIG. 3, an outer edge 7 is provided on the outer periphery of the diaphragm 5, and the outer periphery of the outer edge 7 is connected to a cabinet 8.

The diaphragm 5 and the cabinet 8 are connected to each other by an inner edge 6 on the rear surface of the diaphragm 5.

Also, the diaphragm 5. A portion surrounded by the outer edge 7, inner enclosure and cabinet 8 is sealed by the outer edge 7, inner edge 6 and cabinet 8 of the diaphragm 5°.

Furthermore, the central portion of the speaker system surrounded by the diaphragm 5 and the inner edge 6 is open.

Because of this structure, this speaker system
It has the characteristics of a closed speaker system and an open speaker system.

A conventional speaker system using the basic structure of the above-described speaker system will be described below with reference to FIGS. 4 and 5.

This conventional speaker system, as shown in Figure 4,
A magnetic circuit 14 consisting of a diaphragm 1, a cabinet 15, a frame 13, a pole piece 17, a permanent magnet 18 and a plate 19, a voice coil 12, a voice coil bobbin 12', a damper 11, an inner edge 9 and an outer edge. The main components are Edge 10.

As shown in FIG. 5, the inner edge 9 has a rising portion 9b at one end of the roll portion 9a, and connects the diaphragm 1 and the rib portion 2 of the frame 13.

In addition, in this speaker system, in order to provide an amplitude margin for the vibration of the diaphragm 1, the diaphragm 1 and the frame 1 are
A step is provided between the lip portion 2 of No. 3 and the lip portion 2 of No. 3. For this,
As shown in FIG. 5, the shape of the inner edge 9 is such that a rising portion 9b is provided on the diaphragm 1 side.

Among these members, the edges 9 are made of, for example, maltblen, cloth, or the like. Also, the thickness of the inner edge 9 is the fifth
As shown in the figure, the thickness is uniform throughout. Therefore, the rigidity of the roll portion 9a and the rising portion 9b is equal.

The voice coil 12 wound around the voice coil bobbin 12' is inserted into the gap of the magnetic circuit 14.
A voice coil bobbin 12' and a diaphragm 1 are connected. Furthermore, voice coil bobbin 12' and frame 1
3 are connected to each other by a damper 11.

In addition, a frame port section 16 is provided on the rear of the speaker system.
has been established.

With the above structure, the inner edge 9. Vibration plate 1. outer engine 1
0. surrounded by a cabinet 15 and a frame 13;
The part including the magnetic circuit 14 becomes a sealed part. Also, the diaphragm 1. A portion surrounded by the inner edge 9 and the frame 13 and including the frame port portion 16 becomes an open portion, and air escapes to the rear surface of the speaker system through the frame port portion 16.

[Problem to be solved by the invention]

In this conventional speaker system, when the diaphragm 1 moves forward (upward in the drawing), the roll portion 9a of the inner edge 9 extends to follow the movement of the diaphragm 1. However, when the diaphragm 1 moves backward (downward in the drawing), the roll portion 9a and the rising portion 9b of the inner edge 9 have the same rigidity, so the rolling portion 9a deforms and the rising portion 9b also deforms. For this reason, there is a problem in that the linearity of the front and back movement of the imaging plate 1 changes.

In addition, when the diaphragm 1 moves backward, pressure is applied to the inner edge 9 from the sealed part side, so in the low frequency range with large amplitude, the rising part 9b of the inner edge 9 may be deformed by the pressure from the sealed part side. There is. As a result, the speaker system has a problem of generating abnormal sounds.

Therefore, an object of the present invention is to provide a speaker system that has a diaphragm with good linearity and can prevent abnormal sounds from occurring in the low frequency range.

[Means to solve the problem]

The speaker system of the present invention is characterized in that the rigidity of the rising portion of the edge member that connects the diaphragm and the frame is higher than that of the roll portion.

[For production]

According to the configuration of the present invention, since the rigidity of the rising portion of the edge member is higher than that of the roll portion, only the roll portion of the edge member is deformed when the diaphragm moves back and forth. Therefore, only the roll portion of the edge member affects the back and forth movement of the diaphragm, and the linearity of the back and forth movement of the diaphragm can be ensured. Also,
By increasing the rigidity of the rising part, the strength of the rising part against the pressure from the sealed part when the diaphragm moves backward in the low frequency range with large amplitude can be increased, and deformation of the rising part can be prevented.

〔Example〕

A first embodiment of this invention will be described based on FIG.

In the speaker system of this first embodiment, as shown in FIG. 1, the diaphragm 1 and the frame 13 are connected by an inner edge 3 having a rising portion 3b at one end of a roll portion 3a. By making the thickness t2 of the rising part 3b of the inner edge 3 thicker than the thickness 1 of the roll part 3a, the rising part 3
The rigidity of the roller portion b is higher than that of the roll portion 3a.

The other configurations are similar to conventional speaker systems.

The operation of the speaker system of this first embodiment will be explained based on FIG.

In this speaker system, when the diaphragm l moves forward (upward in the drawing), only the roll portion 3a of the inner edge 3 extends, and the diaphragm 1 Follow movement.

Furthermore, when the diaphragm 1 moves backward (downward in the drawing), the stiffness of the rising part 3b of the inner edge 3 is higher than that of the roll part 3a, so the rising part 3b does not deform and only the roll part 3a It is pushed by the diaphragm l and deforms. Therefore, only the roll portion 3a of the inner edge 3 affects the back and forth movement of the diaphragm 1, and the nearness of the back and forth movement of the diaphragm 1 can be ensured.

In addition, since the rigidity of the rising portion 3b is made higher than that of the roll portion 3a, the diaphragm 1 moves rearward and the rising portion 3b resists pressure from the sealed portion side (not shown) of the speaker system. 3b can be increased in strength, and deformation of the rising portion 3b can be prevented. As a result, abnormal sounds in the low frequency range with large amplitude can be prevented.

A second embodiment of the invention will be described based on FIG.

The configuration of this speaker system uses an inner edge 4 as shown in FIG. 2 in place of the inner edge 3 used in the first embodiment.

By increasing the thickness of the rising portion of the inner edge 4 as it approaches the diaphragm 1 from the roll portion, the stiffness of the rising portion is made higher than that of the roll portion.

The other configurations are similar to the speaker system of the first embodiment.

The operation and effects of this second embodiment are similar to those of the first embodiment.

In the first and second embodiments, the thickness of the rising part of the inner edge member is made thicker than the thickness of the roll part, so that the stiffness of the rising part is made higher than that of the roll part. The rigidity of the rising portion may be made higher than that of the roll portion by means such as those described in .

If the material of the inner edge is cloth, for example, a reinforcing rib is provided at the rising portion.

Further, the rising portion may be reinforced with an adhesive or the like.

〔Effect of the invention〕

The speaker system of this invention has a structure in which the rigidity of the rising part of the edge member is higher than that of the roll part, so it is possible to ensure the linearity of the front and back movement of the diaphragm, and prevent abnormal noise in the low frequency range with large amplitude. can.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the inner edge portion of the first embodiment of the invention, FIG. 2 is a sectional view of the inner edge portion of the second embodiment of the invention, and FIG. 3 is the basics of a conventional speaker system. FIG. 4 is a cross-sectional view showing the structure of a conventional speaker system, and FIG. 5 is a cross-sectional view of the conventional inner edge portion. DESCRIPTION OF SYMBOLS 1... Vibration plate, 3a... Roll part, 3b... Rising part, 3.4... Edge, 13... Frame/11
Ahl & Figure 1 ゝ13 frames/1 ＼13 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A speaker system in which a diaphragm and a frame are connected by an edge member having a rising portion at one end of the roll portion, wherein the stiffness of the rising portion of the edge member is higher than the rigidity of the roll portion.