Unlock instant, AI-driven research and patent intelligence for your innovation.

Vibration plate, speaker unit and portable information terminal

By designing diaphragms with different arc curvatures, the problem of the lowest resonance frequency and top stretch in the speaker unit is solved, and the effects of lowering the resonance frequency and suppressing abnormal noise are achieved.

Inactive Publication Date: 2012-05-09
SANYO ELECTRIC CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the method of increasing the mass of the vibrating system, the lowest resonance frequency cannot be lowered below a certain level
[0008] In the above-mentioned publication, since the rigidity of the edge portion is suppressed low, there is a problem of increased deformation and abnormal noise as in the above-mentioned first method.
Therefore, in the above-mentioned publications, the lowest resonance frequency cannot be lowered below a certain level

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0035] First, the structure of the speaker unit according to Embodiment 1 of the present invention will be described.

[0036] Reference figure 1 and figure 2 The speaker unit 10 mainly includes a frame 11, a vibration plate 12, a frame cover 13, a voice coil 14, a magnet 15, a plate 16, and a yoke 17. It should be noted that in figure 2 Among them, the frame cover 13 is not shown for easy viewing.

[0037] The frame 11 mainly has a support portion 11a, an inner peripheral portion 11b, and an upper end portion 11c. The frame 11 supports the vibration plate 12 so as to be able to vibrate by supporting the frame mounting portion 12d of the vibration plate 12 on the upper surface of the support portion 11a. A height difference may be provided between the support portion 11a and the inner peripheral portion 11b. Furthermore, the frame 11 supports the yoke 17 in the inner peripheral portion 11b. The upper end portion 11c is continuously formed on the outer peripheral side of the su...

Embodiment approach 2

[0099] First, the structure of the portable information terminal of this embodiment will be described. In this embodiment, a portable information terminal including the speaker unit of Embodiment 1 will be described.

[0100] Reference Picture 9 and Picture 10 The portable information terminal 100 of this embodiment is a portable telephone, and mainly includes an upper casing 101, a display unit 102, a sound hole 103, a hinge unit 104, a lower casing 105, operation buttons 106, numeric buttons 107, and a display unit 111 , Sound hole 112, the speaker unit of Embodiment 1 not shown.

[0101] Reference Picture 9 , A display unit 102 is provided on the surface of the upper housing 101. A sound emission hole 103 is formed on one end side of the surface of the upper housing 101. A hinge portion 104 is formed on the other end side of the upper housing 101. A hinge portion 104 is formed on one end side of the lower frame 105. The upper frame body 101 and the lower frame body 105 ar...

Embodiment 1

[0111] As Example A, it is made to have Picture 11 Vibration plate 12 of the size shown. Reference Picture 11 , The outer diameter of the vibration plate 12 is 14.5 mm in diameter. The diameter of the central vibrating part 12a is 8.25 mm. The diameter of the voice coil mounting portion 12b is 9.0 mm. The diameter of the edge 12c is 13.7 mm. The diameter of the frame mounting portion 12d is 14.5 mm. The diameter of the frame mounting portion 12d becomes the diameter of the vibration plate 12. In the edge portion 12c, the radius of curvature of the central portion 120 is R7.934mm, the radius of curvature of the one end portion 121 is R0.30mm, and the radius of curvature of the other end portion 122 is R0.35mm. The height of the edge 12c is 0.30 mm.

[0112] As a comparative example A, it is made to have Picture 12 Vibration plate 12 of the size shown. Reference Picture 12 The outer diameter of the vibrating plate 12, the diameter of the central vibrating portion 12a, the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An edge portion includes a center portion, one end and an other end. As seen in a cross section of a vibration plate in the radial direction, the center portion, the one end and the other end each are formed in a circular arc such that the edge portion forms a convex so as to protrude in a direction in which the protruding shape protrudes. The radius of curvature of the circular arc of the center portion is not less than the radius of curvature of the circular arc of each of the one end and the other end. Accordingly, a vibration plate allowing a decrease in the lowest resonance frequency while suppressing the edge portion from being brought into a tensioned state, a speaker unit provided with the vibration plate and a portable information terminal can be provided.

Description

Technical field [0001] The present invention relates to a diaphragm, a speaker unit, and a portable information terminal, and more particularly, to a diaphragm having an edge, and a speaker unit and a portable information terminal equipped with the diaphragm. Background technique [0002] Portable information terminals such as mobile phones, digital cameras, personal computers, game consoles, and PDAs (Personal Digital Assistants) are equipped with speaker units. The speaker unit includes a diaphragm. It should be noted that the speaker unit includes a so-called speaker and a receiver. [0003] In order to improve the performance of the speaker unit, the lowest resonance frequency needs to be reduced. As a method of lowering the lowest resonance frequency, for example, there are the following three methods. The first method is to thin the vibrating plate. The second method is to increase the radius of curvature of the edge. The third method is to increase the total mass of the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/06H04R9/02
CPCH04R7/14H04R9/02H04R9/04H04R7/18H04R9/06
Owner SANYO ELECTRIC CO LTD