JPH0230959Y2 - - Google Patents
Info
- Publication number
- JPH0230959Y2 JPH0230959Y2 JP6729085U JP6729085U JPH0230959Y2 JP H0230959 Y2 JPH0230959 Y2 JP H0230959Y2 JP 6729085 U JP6729085 U JP 6729085U JP 6729085 U JP6729085 U JP 6729085U JP H0230959 Y2 JPH0230959 Y2 JP H0230959Y2
- Authority
- JP
- Japan
- Prior art keywords
- conductive pattern
- circuit board
- printed circuit
- air chamber
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 230000035945 sensitivity Effects 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Telephone Set Structure (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6729085U JPH0230959Y2 (en]) | 1985-05-07 | 1985-05-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6729085U JPH0230959Y2 (en]) | 1985-05-07 | 1985-05-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61184399U JPS61184399U (en]) | 1986-11-17 |
| JPH0230959Y2 true JPH0230959Y2 (en]) | 1990-08-21 |
Family
ID=30600975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6729085U Expired JPH0230959Y2 (en]) | 1985-05-07 | 1985-05-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0230959Y2 (en]) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150139457A1 (en) * | 2012-06-06 | 2015-05-21 | Nec Casio Mobile Communications, Ltd. | Speaker device and electronic device |
-
1985
- 1985-05-07 JP JP6729085U patent/JPH0230959Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61184399U (en]) | 1986-11-17 |
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