Loudspeakers and electronic equipment with loudspeakers

A loudspeaker and vibrating plate technology, applied in the field of loudspeakers, can solve the problems of sound quality degradation, inability to deepen and thin the loudspeaker, and the vibration plate is prone to split resonance, etc., to achieve stable frequency characteristics, excellent sound quality, and thinning effects.

Active Publication Date: 2016-10-12
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, since the conventional slender structure loudspeaker adopts the driving method of driving the central portion of the slender diaphragm, split resonance tends to occur in the long side direction of the diaphragm.
As a result, the frequency characteristic related to the reproduced sound pressure level becomes a characteristic that produces peaks and valleys in the middle and high ranges, resulting in deterioration of sound quality.
In addition, with the same opening area, in order to prevent resonance in the longitudinal direction, the diaphragm needs to be made into a deep shape (tapered shape), and there is a problem that the depth of the speaker cannot be reduced.

Method used

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  • Loudspeakers and electronic equipment with loudspeakers
  • Loudspeakers and electronic equipment with loudspeakers
  • Loudspeakers and electronic equipment with loudspeakers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0073] Embodiment 1 will be described below. First, the configuration of speaker 100 in this embodiment will be described. Figure 1A It is a top view of speaker 100 in this embodiment. and, Figure 1B is along Figure 1A A schematic cross-sectional view cut along the line AA' and viewed from the direction of the arrow a. and, Figure 1C is along Figure 1A A schematic cross-sectional view cut along line BB' in and viewed from the direction of arrow b.

[0074] Speaker 100 is composed of diaphragm 110 , voice coil 120 , voice coil bobbin 130 , magnetic circuit 140 , edge portion 150 , frame 160 , and dustproof cover 170 . Such as Figure 1A As shown, the speaker 100 has an elongated shape with different vertical and horizontal lengths. Each structure of speaker 100 will be described below.

[0075] First, the vibrating plate 110 will be described. Figure 2A It is a plan view of the diaphragm 110, and only the left side of the line CC' in FIG. 1 is described. and, Fig...

Embodiment approach 2

[0128] Next, speaker 200 according to Embodiment 2 will be described. Speaker 200 other than speaker 100 of Embodiment 1 is characterized in that the lead-out wire of the voice coil is fastened inside diaphragm 110 .

[0129] Figure 9A is a plan view showing the speaker 200 . Figure 9B will be Figure 9A A schematic cross-sectional view cut along the longitudinal direction. in addition, Figure 9A and Figure 9B The vibration plate 111 a on the upper side of the vibration plate 110 is not shown. The grommet 201 is caulked to the end portion of the lower vibrating plate 111b in the longitudinal direction, and is integrally formed with the lower vibrating plate 111b. The wire 203 is fastened to the grommet 201 , and the other end of the wire 203 is connected to a terminal provided on a frame (not shown), and a signal for driving a speaker is inputted. As the wire 203, for example, a metal wire or the like can be used.

[0130] The voice coil 120 is fastened to the cent...

Embodiment approach 3

[0133] Next, Embodiment 3 will be described. Figure 10A It is a plan view of speaker 300 in this embodiment. and, Figure 10B is along Figure 10A A schematic cross-sectional view cut along the line G-G' in and viewed from the direction of the arrow g.

[0134] In addition to speaker 100 of Embodiment 1, speaker 300 uses diaphragm 210 having two through holes 180 in order to include two voice coil bobbins 130 , and fastens voice coil bobbin 130 through two through holes 180 .

[0135] Next, the driving position of the vibrating plate will be described. Consider the frequency band of the speaker to set the driver position. In speaker 1000 of conventional elongated structure and speaker 100 of Embodiment 1, one voice coil 1006 or voice coil 120 is arranged with the center of the longitudinal direction of diaphragm 1008 or 110 as a driving point. In the case of using the in-band diaphragm 1008 or 110 without resonance, that is, in the case of emphasizing reproduction of the...

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PUM

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Abstract

Provided is a loudspeaker having a thin long structure, and the loudspeaker includes: a frame; a diaphragm having a hollow structure and in which a shape of a plane that is perpendicular to a vibration direction is an oblong shape having a long side and a short side; an edge vibratably supporting the diaphragm and being fixed to the frame; at least one cylinder-shaped voice coil bobbin connected to the diaphragm in a penetrating manner; a voice coil disposed inside the hollow structure of the diaphragm and attached to the voice coil bobbin; and a magnetic circuit disposed inside the voice coil bobbin and configured to drive the voice coil.

Description

technical field [0001] The invention relates to a loudspeaker, in particular to a thinned loudspeaker. Background technique [0002] In recent years, with the popularity of so-called high-definition televisions and wide-view televisions, widescreen television screens have become increasingly common. On the other hand, in terms of housing conditions in Japan, a narrow-width, thin TV set as a whole is required. [0003] Since speaker units for TVs (hereinafter referred to as speakers) are usually installed on both sides of displays such as plasma displays and liquid crystal displays, this is also one of the reasons for the increase in the width of the TV set. Therefore, conventionally, speakers with elongated structures, such as square and oblong, have been used in televisions. In addition, due to the widening of displays, there is a constant need to reduce the width of speakers. In addition, as the number of thin TVs using plasma displays and liquid crystal displays is inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R7/12H04R9/02H04R9/04
CPCH04R9/025H04R7/12H04R9/046H04R2209/022H04R2209/041
Inventor 武轮弘行
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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