JPS626789Y2 - - Google Patents
Info
- Publication number
- JPS626789Y2 JPS626789Y2 JP8326881U JP8326881U JPS626789Y2 JP S626789 Y2 JPS626789 Y2 JP S626789Y2 JP 8326881 U JP8326881 U JP 8326881U JP 8326881 U JP8326881 U JP 8326881U JP S626789 Y2 JPS626789 Y2 JP S626789Y2
- Authority
- JP
- Japan
- Prior art keywords
- dustproof cap
- diaphragm
- cap
- voice coil
- center
- 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 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
【考案の詳細な説明】
本考案は振動板の中心部に貼着されるスピーカ
の防塵キヤツプの改良に関するものである。[Detailed Description of the Invention] The present invention relates to an improvement of a dustproof cap for a speaker that is attached to the center of a diaphragm.
従来、截頭円錐形振動板を有するスピーカは第
1図に示すごとく、センターポール6、マグネツ
ト7、プレート8にて磁気回路を構成し、センタ
ーポール6、プレート8にて磁気空隙を形成し、
プレート8上面にフレーム9の底面を溶接し、磁
気空隙中心に配置するボイスコイルボビン5は外
周部をフレーム9の内底に貼着するダンパー10
によつて磁気空隙中心に保持され、中心部にボイ
スコイルボビン5を垂下する截頭円錐形振動板4
の外周部をフレーム9外周縁に貼着し、振動板4
の内側下方中心部に防塵の為に防塵キヤツプ11
を貼着していた。この防塵キヤツプ11は通気性
のある布、フエルト等の材料又は通気性のない
紙、金属、フイルム等の材料を成形して得るが、
通気性のあるものは第4図a線に示すごとく、低
音域増強可能であるが、強度的に弱く振動板4中
心部を補強する効果は期待できず、高音域におい
て周波数特性にあばれが生ずる欠点がある。通気
性のないものは第4図b線に示すごとく、強度的
に強く、振動板4中心部を補強する効果はある
が、防塵キヤツプ11によつて密閉された空気が
振動板4の振動によつて狭い磁気空隙内を流通し
制動抵抗による制動力が作用して振動板4の振動
態様に悪影響を与える欠点があつた。この為に第
2図に示すごとく、通気性のない紙製の防塵キヤ
ツプ12の中心部に流通孔13を穿設し、この流
通孔13を閉塞する如く通気性のある防塵布14
を貼着して、前記欠点を取除き、両方の効果が得
られる防塵キヤツプがある。上記防塵キヤツプは
防塵、振動板の補強効果がある上に空気が防塵布
14を通つて流通するので、制動抵抗の発生を抑
制し、第5図c線の如く、低音域では音圧が高
く、高音域では周波数特性のあばれがない良好な
特性が得られるものである。 Conventionally, as shown in FIG. 1, a speaker having a truncated conical diaphragm forms a magnetic circuit with a center pole 6, a magnet 7, and a plate 8, and forms a magnetic gap with the center pole 6 and plate 8.
The bottom surface of the frame 9 is welded to the top surface of the plate 8, and the voice coil bobbin 5, which is placed at the center of the magnetic gap, has a damper 10 whose outer periphery is attached to the inner bottom of the frame 9.
A frusto-conical diaphragm 4 is held at the center of the magnetic gap by
The outer periphery of the diaphragm 4 is attached to the outer periphery of the frame 9.
There is a dustproof cap 11 in the lower center of the inside for dustproofing.
was attached. This dustproof cap 11 is obtained by molding a breathable material such as cloth or felt or a non-breathable material such as paper, metal, or film.
As shown in Figure 4 line a, breathable ones can enhance the bass range, but they are weak in strength and cannot be expected to have the effect of reinforcing the center of the diaphragm 4, and the frequency response will be distorted in the treble range. There are drawbacks. Non-ventilated caps are strong and have the effect of reinforcing the center of the diaphragm 4, as shown by line b in Figure 4, but the air sealed by the dustproof cap 11 does not affect the vibration of the diaphragm 4. Therefore, there is a drawback that the magnetic flux flows through the narrow magnetic gap and exerts a braking force due to the braking resistance, which adversely affects the vibration mode of the diaphragm 4. For this purpose, as shown in FIG. 2, a ventilation hole 13 is bored in the center of a dustproof cap 12 made of non-porous paper, and a breathable dustproof cloth 14 is used to close the ventilation hole 13.
There is a dustproof cap that can be attached to remove the above drawbacks and obtain both effects. The above-mentioned dustproof cap has the effect of preventing dust and reinforcing the diaphragm, and since air flows through the dustproof cloth 14, it suppresses the occurrence of braking resistance, and the sound pressure is high in the low frequency range, as shown in line c in Figure 5. In the treble range, good characteristics with no flaws in frequency characteristics can be obtained.
しかるに上記防塵キヤツプは孔を穿設したり、
防塵布14を貼着する手数が必要であり、コスト
的に高価につく欠点があつた。 However, the above-mentioned dustproof cap has holes or
It requires a lot of effort to attach the dust-proof cloth 14, which has the disadvantage of being expensive.
本考案は上記欠点を取除く為に考案されたもの
で、図面に示す実施例について説明すれば、第3
図に示すごとく、中心部にボイスコイルボビン5
を垂下する截頭円錐形振動板4の内側下方中心部
に、ボイスコイルボビン5上端開口を閉塞するご
とく貼着された天然繊維又は合成繊維製防塵キヤ
ツプ1の部分的単数個所又は複数個所2を外周部
3より薄く抄き分け、通気性を持たせたことを特
徴とするスピーカの防塵キヤツプである。 The present invention was devised to eliminate the above-mentioned drawbacks, and if the embodiment shown in the drawings is explained, it will be explained as follows.
As shown in the figure, there is a voice coil bobbin 5 in the center.
A dust-proof cap 1 made of natural fiber or synthetic fiber is attached to the inner lower center of the frusto-conical diaphragm 4 that hangs down so as to close the upper end opening of the voice coil bobbin 5. This is a dustproof cap for a speaker, which is made thinner than Part 3 and has breathability.
本考案は上記のような構成になつているので、
外周部3は防塵、振動板の補強効果がある上に空
気が部分的単数個所又は複数個所2を通つて流通
するので、制動抵抗の発生を抑制し、第5図d線
の如く、低音域では音圧が高く、高音域では周波
数特性のあばれがない良好な特性が得られるもの
で、抄分け無しの従来の防塵キヤツプと同コスト
で作成可能である。 Since the present invention has the above structure,
The outer peripheral part 3 has the effect of preventing dust and reinforcing the diaphragm, and since air flows through one or more parts 2, it suppresses the occurrence of braking resistance and improves the low frequency range as shown in line d in Figure 5. It has a high sound pressure and good frequency characteristics in the high frequency range, and can be made at the same cost as a conventional dustproof cap without separation.
本考案は以上に述べた如く、コストの安い高性
能の防塵キヤツプが得られる工業上有益な考案で
ある。 As described above, the present invention is an industrially useful invention that provides a low-cost, high-performance dustproof cap.
第1図はスピーカ断面図、第2図は従来の防塵
キヤツプ断面図、第3図は本考案防塵キヤツプ断
面図、第4図は従来のスピーカ特性図、第5図は
従来の防塵キヤツプ、本考案防塵キヤツプを使用
した時の特性比較図。
1は防塵キヤツプ、2は部分的単数個所又は複
数個所、3は外周部、4は振動板、5はボイスコ
イルボビン。
Fig. 1 is a sectional view of a speaker, Fig. 2 is a sectional view of a conventional dustproof cap, Fig. 3 is a sectional view of the dustproof cap of the present invention, Fig. 4 is a characteristic diagram of a conventional speaker, and Fig. 5 is a sectional view of a conventional dustproof cap. Comparison diagram of characteristics when using the devised dustproof cap. 1 is a dust-proof cap, 2 is a partial portion or multiple portions, 3 is an outer peripheral portion, 4 is a diaphragm, and 5 is a voice coil bobbin.
Claims (1)
円錐形振動板4の内側下方中心部に、ボイスコイ
ルボビン5上端開口を閉塞する如く貼着された天
然繊維又は合成繊維製防塵キヤツプ1の部分的単
数個所又は複数個所2を外周部3より薄く抄き分
け、通気性を持たせたことを特徴とするスピーカ
の防塵キヤツプ。 A dust-proof cap 1 made of natural fiber or synthetic fiber is attached to the inner lower center of the frusto-conical diaphragm 4 from which the voice coil bobbin 5 hangs, so as to close the upper end opening of the voice coil bobbin 5. Alternatively, a dustproof cap for a speaker is characterized in that a plurality of portions 2 are made thinner than the outer peripheral portion 3 to provide ventilation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8326881U JPS626789Y2 (en) | 1981-06-05 | 1981-06-05 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8326881U JPS626789Y2 (en) | 1981-06-05 | 1981-06-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57195296U JPS57195296U (en) | 1982-12-10 |
JPS626789Y2 true JPS626789Y2 (en) | 1987-02-17 |
Family
ID=29878707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8326881U Expired JPS626789Y2 (en) | 1981-06-05 | 1981-06-05 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS626789Y2 (en) |
-
1981
- 1981-06-05 JP JP8326881U patent/JPS626789Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS57195296U (en) | 1982-12-10 |
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