JP3064695B2 - Speaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In recent years, loudspeakers have been required to be small and compact, to reproduce heavy and low-frequency sounds, and furthermore, to improve the appearance and quality of the speakers due to problems such as housing conditions. Among them, as a design means that satisfies the above requirements, a so-called discrete edge type speaker, in which the outer diameter of the diaphragm is larger than that of the edge clamp portion, is being widely used.

Based on the above background, a conventional discrete edge type speaker will be described below. FIG. 3 shows a conventional speaker of this type. Referring to FIG. 3, a frame 6 is coupled to an upper plate 2 of a magnetic circuit 4 having a magnet 1 sandwiched between an upper plate 2 and a lower plate 3.
The other end of the edge 8 having one end adhered to the back surface from the center part of the diaphragm 7 made of paper or the like at a distance from the outer peripheral part 7A of the diaphragm 7 7
The voice coil 10 is fitted into the magnetic gap 5 while the center of the voice coil 10 coupled to the center of the diaphragm 7 is held at the center by the damper 11, and the dust cap 12 is attached to the upper surface of the diaphragm 7 at the coupling with the voice coil 10. It was constructed by bonding.

[0004]

However, the conventional discrete edge type loudspeaker is in a free state since the outer peripheral portion 7A of the diaphragm 7 has no clamper for the diaphragm 7.

[0005] Therefore, when the vibration plate 7 oscillates, unnecessary resonance is generated in the outer peripheral portion 7A to disturb the frequency characteristics, and in a severe case, quality defects such as generation of abnormal sound called surface squeal may occur. These phenomena often occur particularly when the weight of the diaphragm 7 is reduced in order to improve the sound pressure level.

An object of the present invention is to solve such a conventional problem and to provide a speaker having excellent frequency characteristics and sound pressure characteristics.

[0007]

According to the present invention, there is provided a loudspeaker according to the present invention, in which a frame is connected to a magnetic circuit having a magnetic gap, and a voice coil is connected to a central portion of a peripheral portion of the frame, and an outer peripheral portion is provided. The other end of the edge having one end connected to the back surface of the outer peripheral portion of the diaphragm in which the corrugation having a cross-sectional waveform is radially formed except for the corrugation is connected, and a voice coil is fitted into the magnetic gap. .

[0008]

With the above construction, the outer peripheral portion of the diaphragm has a wavy shape with respect to the vertical amplitude of the diaphragm, so that the rigidity with respect to the vertical amplitude is greater than that of the conventional product, and is unnecessary. Resonance and squeal can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A speaker according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the configuration of a speaker according to the present invention. Numeral 21 denotes a magnet which vertically couples an upper plate 22 and a lower plate 23 to form a magnetic circuit 24 having a magnetic gap 25.

A frame 26 is provided on the upper surface of the magnetic circuit 24.
The other end of an edge 28 in which a diaphragm 27 described in detail below is connected to one end of the frame 26 is connected to the peripheral edge of the frame 26. A voice coil 30 whose center is supported by a damper 31 is connected to the center of the diaphragm 27. The voice coil 30 is fitted into the magnetic gap 25, and further enters the magnetic gap 25 from outside. A dust cap 32 is attached to the upper surface of the center of the diaphragm 27 to prevent foreign matter.

FIG. 2 is a half sectional front view of the diaphragm 27 shown in the above embodiment. Corrugations 27A having a corrugated cross section are radially formed on the outer periphery of the diaphragm 27, and the diaphragm 27 except for the corrugations 27A is formed. One end of an edge 28 is connected to the back surface of the outer peripheral portion, and the other end of the edge 28 is connected to the peripheral portion of the frame 26.

[0012]

As described above, the speaker according to the present invention has the following features.
Since the shape of the outer peripheral portion of the diaphragm is corrugated, the rigidity of the diaphragm with respect to the vertical amplitude is increased, and unnecessary resonance and surface squeal can be prevented. Therefore, it is possible to easily improve the sound pressure level by improving the input resistance of the speaker and reducing the weight of the diaphragm, and it is also possible to prevent poor quality such as abnormal sound due to surface squeal, and to improve the frequency characteristics and sound pressure. It is possible to provide a speaker having excellent characteristics, and its industrial value is very large.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a speaker according to an embodiment of the present invention.

FIG. 2 is a half sectional front view showing the diaphragm according to the embodiment.

FIG. 3 is a cross-sectional view showing a configuration of a conventional speaker.

[Explanation of symbols]

 Reference Signs List 21 magnet 22 upper plate 23 lower plate 24 magnetic circuit 25 magnetic gap 26 frame 27 diaphragm 27A corrugation 28 edge 30 voice coil 31 damper 32 dust gap

Claims (1)

(57) [Claims] An excluding the corrugation of a diaphragm in which a frame is coupled to a magnetic circuit having a magnetic gap, a voice coil is coupled to a central portion at a peripheral portion of the frame, and corrugations having a cross-sectional waveform are radially formed at an outer peripheral portion. With the other end of the edge that has one end joined to the back surface of the outer peripheral part,
A speaker in which a voice coil is fitted in the magnetic gap.