JPH0221897U - - Google Patents
Info
- Publication number
- JPH0221897U JPH0221897U JP9322488U JP9322488U JPH0221897U JP H0221897 U JPH0221897 U JP H0221897U JP 9322488 U JP9322488 U JP 9322488U JP 9322488 U JP9322488 U JP 9322488U JP H0221897 U JPH0221897 U JP H0221897U
- Authority
- JP
- Japan
- Prior art keywords
- case
- cavity
- hole
- communicate
- space
- 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.)
- Pending
Links
- 238000005192 partition Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Description
第１Ａ図および第１Ｂ図は、それぞれ、この考
案の一実施例を示し、第１Ａ図はその図解図であ
り第１Ｂ図はその背面図である。第２図は第１Ａ
図および第１Ｂ図に示す実施例の周波数―音圧特
性を示すグラフである。第３図は第１Ａ図および
第１Ｂ図に示す実施例の変形例の周波数―音圧特
性を示すグラフである。第４図は従来の圧電イヤ
ホンの一例を示す図解図である。第５図は第４図
に示す従来例の周波数―音圧特性を示すグラフで
ある。
図において、１０は圧電イヤホン、１２はケー
ス、１６は圧電振動子、２２はキヤビテイ、２４
はバツクキヤビテイ、２６は放音孔、２８は後部
孔、３２は開閉弁を示す。
1A and 1B each show an embodiment of this invention, with FIG. 1A being an illustrative view and FIG. 1B being a rear view thereof. Figure 2 is 1A
1B is a graph showing frequency-sound pressure characteristics of the embodiment shown in FIG. 1B. FIG. 3 is a graph showing frequency-sound pressure characteristics of a modification of the embodiment shown in FIGS. 1A and 1B. FIG. 4 is an illustrative view showing an example of a conventional piezoelectric earphone. FIG. 5 is a graph showing the frequency-sound pressure characteristics of the conventional example shown in FIG. In the figure, 10 is a piezoelectric earphone, 12 is a case, 16 is a piezoelectric vibrator, 22 is a cavity, and 24
26 is a sound emitting hole, 28 is a rear hole, and 32 is an on-off valve.
Claims (1)
ビテイとに仕切るように前記ケース内に設けられ
る圧電振動子、 前記キヤビテイに通じるように前記ケースに形
成される放音孔、 前記バツクキヤビテイに通じるように前記ケー
スに形成される貫通孔、および、 前記放音孔および前記貫通孔の少なくとも一方
の通路の面積の大きさを変えるための変化手段を
含む、圧電イヤホン。[Claims for Utility Model Registration] A case having a space therein, a piezoelectric vibrator provided in the case so as to partition the space in the case into a cavity and a back cavity, and a piezoelectric vibrator formed in the case so as to communicate with the cavity. a sound emitting hole, a through hole formed in the case so as to communicate with the back cavity, and a changing means for changing the area of a passage of at least one of the sound emitting hole and the through hole. Piezoelectric earphones.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9322488U JPH0221897U (en) | 1988-07-13 | 1988-07-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9322488U JPH0221897U (en) | 1988-07-13 | 1988-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0221897U true JPH0221897U (en) | 1990-02-14 |
Family
ID=31317671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9322488U Pending JPH0221897U (en) | 1988-07-13 | 1988-07-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0221897U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011523566A (en) * | 2008-05-02 | 2011-08-18 | ダイメディックス コーポレイション | Agitator for stimulating the central nervous system |
| JP2016072744A (en) * | 2014-09-29 | 2016-05-09 | 京セラ株式会社 | Acoustic generator and electronic device using the same |
-
1988
- 1988-07-13 JP JP9322488U patent/JPH0221897U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011523566A (en) * | 2008-05-02 | 2011-08-18 | ダイメディックス コーポレイション | Agitator for stimulating the central nervous system |
| JP2016072744A (en) * | 2014-09-29 | 2016-05-09 | 京セラ株式会社 | Acoustic generator and electronic device using the same |