CN101729964B

CN101729964B - Electroacoustic transducer

Info

Publication number: CN101729964B
Application number: CN 200910206377
Authority: CN
Inventors: 李芳庆
Original assignee: High Tech Computer Corp
Current assignee: HTC Corp
Priority date: 2008-10-17
Filing date: 2009-10-15
Publication date: 2013-01-16
Anticipated expiration: 2029-10-15
Also published as: CN101729964A

Abstract

The invention discloses an electroacoustic transducer which comprises a stationary electric vibrating diaphragm, an opening plate and a plurality of spacing structures. The spacing structures are arranged between the stationary electric vibrating diaphragm and the opening plate, wherein each spacing structure is provided with at least one main body, and the number of the main bodies is a positive integer. When the number of the main bodies is larger than one, the main bodies are respectively connected with a central point and are radially extended outwards.

Description

Electroacoustic transducer

Technical field

The present invention relates to a kind of electroacoustic transducer, particularly relate to a kind of electroacoustic transducer with better output volume and tool low frequency extension effect.

Background technology

Barrier material is for electret diaphragm and perforated panel are separated, to keep the oscillation space of electret diaphragm, so that after the electroacoustic transducer energising, electret diaphragm can vibrate and produce sound according to the message of input between included in the electroacoustic transducer.

Fig. 1 is existing electroacoustic transducer schematic diagram, in existing electroacoustic transducer 10, it is grid-like that interval insulant 13 is usually, be convexly set on the perforated panel 11, when electret diaphragm 12 is arranged on the perforated panel 11, electret diaphragm 12 contacts with grid-like interval insulant 13, stays the oscillation space P of rectangle between perforated panel 11 and electret diaphragm 12.Yet because electret diaphragm 12 is fixed in four limits of rectangle oscillation space P, electret diaphragm 12 can only be in the internal vibration of oscillation space P scope, in other words, effective oscillation space of electret diaphragm 12 is subject to the restriction of interval insulant 13, cause the volume exported little, and low frequency can't extend.

Summary of the invention

The object of the present invention is to provide a kind of electroacoustic transducer, to address the above problem.

The object of the present invention is achieved like this, and a kind of electroacoustic transducer namely is provided, and electroacoustic transducer comprises an electret diaphragm, a perforated panel and a plurality of spacer structure.Spacer structure is arranged between electret diaphragm and the perforated panel, and wherein each spacer structure has at least one main body, and the quantity of main body is a positive integer.And work as the quantity of main body greater than for the moment, main body is connected to a central point, and by the outside radial extension of central point.

For other purposes of the present invention, feature and advantage can be become apparent, cited below particularlyly go out preferred embodiment, and cooperate appended accompanying drawing, be described in detail below:

Description of drawings

Fig. 1 is existing electroacoustic transducer schematic diagram;

Fig. 2 is electroacoustic transducer schematic diagram of the present invention;

Fig. 3 is the enlarged drawing of A part among Fig. 2;

Fig. 4 is the vertical view of perforated panel in the electroacoustic transducer of the present invention;

Fig. 5 is the enlarged drawing of A ' part among Fig. 4: and

Fig. 6-Fig. 8 shows the schematic diagram of the variation example of perforated panel in the electroacoustic transducer of the present invention.

The main element symbol description

10 electroacoustic transducers

11 perforated panels

110 perforated panels

111 perforates

12 electret diaphragms

120 stay conductive film

13 interval insulants

130,1300 spacer structures

The 130C central point

131,132,133,134 main bodys

131 ', 132 ' main body

131 ", 132 ", 133 " " main body

G the first spacing

G the second spacing

T thickness

The W width

Embodiment

Fig. 2 is electroacoustic transducer schematic diagram of the present invention; Fig. 3 is the enlarged drawing of A part among Fig. 2; Fig. 4 is electroacoustic transducer vertical view of the present invention; Fig. 5 is the enlarged drawing of A ' part among Fig. 4.

Cooperation is referring to Fig. 2 and Fig. 4, and electroacoustic transducer 100 of the present invention comprises that a perforated panel 110, is in conductive film 120 and a plurality of spacer structure 130.Perforated panel 110 has a plurality of perforates 111, and these perforate 111 shared gross areas are 5%～40% of these perforated panel 110 areas, and wherein these perforates 111 is shaped as circle or other arbitrary shape.Stay conductive film 120 and be arranged on the perforated panel 110, and spacer structure 130 is distributed in perforated panel 110 and stays between the conductive film 120, can stay conductive film 120 and perforated panel 110 be separated by spacer structure 130.It should be noted that spacer structure 130 can be arranged at respectively on the perforated panel 110, or can be one-body molded with perforated panel 110, and the mode that spacer structure 130 is matrix is arranged (as shown in Figure 4).

Cooperation is referring to Fig. 3 and Fig. 5, spacer structure 130 is crosswise, and comprise four main bodys 131,132,133,134, and four main bodys 131,132,133,134 mutual vertically making form an angle of 90 degrees that equate each other, and by the outside radial extension of a central point 130C, and a main body wherein of each spacer structure 130 is corresponding with these main bodys wherein of another 130 spacer structure, in this embodiment, the main body 132 corresponding (as shown in Figure 5) of the main body 134 of left side spacer structure 130 and right side spacer structure 130.Between the central point 130C of two adjacent spacer structures 130 at a distance of one first spacing G, and the one second spacing g of being separated by between the main body of two adjacent spacer structures 130, wherein the first spacing G is 5 to 2 or 5 to 3 with the ratio of the second spacing g, illustrate, when the first spacing G was 10mm, the second spacing g can be 4mm or 6mm; When the first spacing G was 7mm, the second spacing g can be 2.8mm or 4.2mm; When the first spacing G was 15mm, the second spacing g can be 6mm or 9mm, and the first spacing G set between between the 5mm to 50mm for better.

In addition, main body 131,132,133,134 has respectively a width W (as shown in Figure 5) and a thickness T (as shown in Figure 3), extension 131,132 width W are set as 1mm, and thickness T can be derived by following formula: T (μ m)=(10x G (mm)+100) ± 20%, that is to say, when the first spacing G was 10mm, main body 131,132,133,134 thickness T were 200 μ m ± 20%; When the first spacing G was 7mm, main body 131,132,133,134 thickness T were 170 μ m ± 20%; When the first spacing G was 15mm, extension 131,132 thickness T were 250 μ m ± 20%.

In the measurement of reality, at same size, and the spacing of two central points that spacer structure (interval insulant) is adjacent also is under the condition of 10mm simultaneously, is compared to the output volume of existing electroacoustic transducer, and the output volume of electroacoustic transducer of the present invention can promote 6dB really.

In the above-described embodiments, the quantity of main body is four, but be not limited to this, spacer structure also can only have a main body, two main bodys or three main bodys, or even more than three main bodys, as long as main body is positive integer, no matter and the quantity of main body why, the feature of those main bodys itself and distance relation each other all define such as previous embodiment.

As shown in Figure 6, spacer structure only has a main body 1300, and the width of main body 1300 is 1mm.When spacer structure had N main body, wherein N was the positive integer greater than, and main body forms equal each other

The degree angle.As shown in Figure 7, spacer structure 130 has two main bodys 131 ', 132 ', and 130C stretches out by central point, and forms the 180 degree angles that equate between the main body 131 ', 132 '.As shown in Figure 8, spacer structure 130 has three main bodys 131 ", 132 ", 133 ", 130C stretches out by central point, and main body 131 ", 132 ", 133 " between the 120 degree angles that form to equate.By that analogy, when main body was five, main body formed 72 equal degree angles each other.When main body was 6, main body formed 60 equal degree angles each other.The feature of aforementioned body itself (thickness, width) and distance relation each other (spacing) all define such as previous embodiment.

No matter applied spacer structure has several main bodys in the electroacoustic transducer of the present invention, all can reduce the contact area between electret diaphragm and spacer structure, and then effective oscillation space of increase electret diaphragm, experimental data of the present invention shows, when main body when being three (as shown in Figure 8) and four (as shown in Figure 4), can effectively promote vibrating diaphragm sensitivity more than 40% and the low frequency elongation of electroacoustic transducer, in addition, especially when main body is three (as shown in Figure 8), more can promote the high frequency elongation of electroacoustic transducer, and the frequency range of existing 12KHz is increased to more than the 15KHz.

Although disclosed the present invention in conjunction with above preferred embodiment; yet it is not to limit the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; can do a little change and retouching, thus protection scope of the present invention should with enclose claim was defined is as the criterion.

Claims

1. electroacoustic transducer comprises:

Electret diaphragm;

Perforated panel with a plurality of perforates; And

A plurality of spacer structures are arranged between this electret diaphragm and this perforated panel, and wherein each these a plurality of spacer structure has at least one main body, and the quantity of this main body is a positive integer,

Wherein work as the quantity of this main body greater than for the moment, described main body is connected to a central point, and by the outside radial extension of this central point.

2. electroacoustic transducer as claimed in claim 1, wherein when the quantity of this main body was N, wherein N was the positive integer greater than, main body forms equal each other

The degree angle.

3. electroacoustic transducer as claimed in claim 1 wherein forms equal angles between per two described main bodys.

4. electroacoustic transducer as claimed in claim 1, wherein said main body is two, and forms each other the 180 degree angles that equate.

5. electroacoustic transducer as claimed in claim 1, wherein said main body is three, and forms each other the 120 degree angles that equate.

6. electroacoustic transducer as claimed in claim 1, wherein said main body is four, forms a cross shape, and forms an angle of 90 degrees that equates each other.

7. electroacoustic transducer as claimed in claim 1, wherein these a plurality of spacer structures are arranged at respectively on this perforated panel, or one-body molded with this perforated panel.

8. electroacoustic transducer as claimed in claim 1, wherein between two adjacent described central points at a distance of one first spacing, this first spacing is between between the 5mm to 50mm.

9. electroacoustic transducer as claimed in claim 8, wherein each these a plurality of spacer structure has a thickness, and this thickness is derived by following formula: T (μ m)=(10xG (mm)+100) ± 20%, T is that this thickness, G are this first spacing.

10. electroacoustic transducer as claimed in claim 1, wherein between two adjacent described central points at a distance of one first spacing, this first spacing is between between the 5mm to 50mm; And

Wherein said main body has respectively a width, and this width is 1mm.

11. electroacoustic transducer as claimed in claim 10, wherein each these a plurality of spacer structure has a thickness, and this thickness is derived by following formula: T (μ m)=(10xG (mm)+100) ± 20%, T is that this thickness, G are this first spacing.

12. electroacoustic transducer as claimed in claim 10 wherein has one second spacing between the described main body of two these adjacent a plurality of spacer structures, and the ratio of this first spacing and this second spacing is 5 to 2 or 5 to 3.

13. electroacoustic transducer as claimed in claim 1, wherein the shared gross area of these a plurality of perforates is 5%～40% of this perforated panel area.

14. electroacoustic transducer as claimed in claim 1, wherein these a plurality of perforates is shaped as circle or other arbitrary shape.