JP3523749B2 - Noise removal structure of light source device for electronic endoscope - Google Patents
Noise removal structure of light source device for electronic endoscopeInfo
- Publication number
- JP3523749B2 JP3523749B2 JP09333096A JP9333096A JP3523749B2 JP 3523749 B2 JP3523749 B2 JP 3523749B2 JP 09333096 A JP09333096 A JP 09333096A JP 9333096 A JP9333096 A JP 9333096A JP 3523749 B2 JP3523749 B2 JP 3523749B2
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- Japan
- Prior art keywords
- light source
- source device
- conductive
- electronic endoscope
- noise
- Prior art date
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Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】本発明は電子内視鏡用光源装
置、特にキセノンランプを用いた光源装置から発生する
ノイズを除去するための構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device for an electronic endoscope, and more particularly to a structure for removing noise generated from the light source device using a xenon lamp.
【０００２】[0002]
【従来の技術】電子内視鏡装置は、電子スコープの先端
に配設された固体撮像素子であるＣＣＤ（Charge Coupl
ed Device）により、被観察体内を撮像するものであ
り、この被観察体内を撮像するための照射光は光源装置
から先端部まで配設されたライトガイドによって供給さ
れる。2. Description of the Related Art An electronic endoscope apparatus is a CCD (Charge Coupl) which is a solid-state image pickup device arranged at the tip of an electronic scope.
ed Device), an image of the inside of the observed body is imaged, and the irradiation light for imaging the inside of the observed body is supplied from a light source device to a tip end of a light guide.
【０００３】図５には、従来の光源装置の一例の構成が
示されており、この光源装置の筐体１内には、キセノン
ランプ２が収納配置されたランプハウス（ケース体）３
が設けられ、このランプハウス３にイグナイター４を介
して点灯回路５が設けられる。また、前面パネルに電子
スコープ側のライトガイドコネクタを接続するコネクタ
受け部６が配設されている。FIG. 5 shows an example of the configuration of a conventional light source device. In a housing 1 of this light source device, a lamp house (case body) 3 in which a xenon lamp 2 is housed and arranged.
The lamp house 3 is provided with a lighting circuit 5 via an igniter 4. Further, a connector receiving portion 6 for connecting a light guide connector on the electronic scope side is arranged on the front panel.
【０００４】上記の光源装置によれば、点灯回路５の作
動によって、イグナイター４にスイッチング電流を与え
てイグナイター放電を起こすことにより、ランプハウス
３内のキセノンランプ２が点灯する。そして、このキセ
ノンランプ２の光は、コネクタ受け部６に配置された電
子スコープ側コネクタのライトガイドへ供給され、この
ライトガイドを介して先端部まで導かれることになり、
この光照射によりＣＣＤの撮像が可能となる。According to the light source device described above, the operation of the lighting circuit 5 gives a switching current to the igniter 4 to cause igniter discharge, so that the xenon lamp 2 in the lamp house 3 is lit. Then, the light of the xenon lamp 2 is supplied to the light guide of the electronic scope-side connector arranged in the connector receiving portion 6, and is guided to the tip end portion via this light guide,
This light irradiation makes it possible to image the CCD.
【０００５】[0005]
【発明が解決しようとする課題】ところで、従来の上記
光源装置では、上記キセノンランプ２の放電作用によっ
て高周波ノイズが発生し、このノイズが映像等に悪影響
を及ぼすという問題がある。このため、上述のように、
キセノンランプ２を金属製のランプハウス３に収納し、
このランプハウス３と装置筐体とを電気的に接続し、筐
体グラウンドへノイズ電流を導くことにより、キセノン
ランプ２から発生するノイズが外部へ輻射されないよう
にしている。By the way, in the above-mentioned conventional light source device, there is a problem that high-frequency noise is generated by the discharge action of the xenon lamp 2 and this noise adversely affects images and the like. Therefore, as mentioned above,
Store the xenon lamp 2 in the metal lamp house 3,
By electrically connecting the lamp house 3 to the device housing and guiding a noise current to the housing ground, noise generated from the xenon lamp 2 is prevented from being radiated to the outside.
【０００６】しかしながら、このランプハウス３と筐体
との電気的接続が良好ではなく、ランプハウス３と筐体
とを確実に同電位に維持することができず、ノイズ除去
が良好に行われないという問題があった。即ち、このラ
ンプハウス３と筐体の電気接続は、ランプハウス３の下
側で固定ネジや導電線により行われるが、これらの接続
では、接触面積が小さいことからノイズ電流をグラウン
ドに良好に落とすことができない。However, the electrical connection between the lamp house 3 and the housing is not good, the lamp house 3 and the housing cannot be reliably maintained at the same potential, and noise is not removed well. There was a problem. That is, the electric connection between the lamp house 3 and the housing is made on the lower side of the lamp house 3 by a fixing screw or a conductive wire. In these connections, the contact area is small, so that the noise current is satisfactorily dropped to the ground. I can't.
【０００７】しかも、ランプハウス３の上面に誘起する
ノイズ成分が、下側のグラウンドへ落とされる前に、上
面から輻射されることが考えられ、このようなノイズを
完全に除去することはできなかった。Moreover, it is considered that the noise component induced on the upper surface of the lamp house 3 is radiated from the upper surface before it is dropped to the lower ground, and such noise cannot be completely removed. It was
【０００８】また、光源装置の点灯回路５では、１１０
ｋＨｚ程度の高い周波数でスイッチング動作をしてお
り、このスイッチング電流によって高周波ノイズが発生
する。しかし、このスイッチング電流により発生するノ
イズについては、ノイズ対策が採られていないのが現状
である。Further, in the lighting circuit 5 of the light source device, 110
The switching operation is performed at a high frequency of about kHz, and the switching current causes high frequency noise. However, as for the noise generated by this switching current, the current situation is that no noise countermeasure is taken.
【０００９】本発明は上記問題点に鑑みてなされたもの
であり、その目的は、キセノンランプから発生するノイ
ズと点灯回路から発生するノイズを良好に除去すること
ができる電子内視鏡用光源装置のノイズ除去構造を提供
することにある。[0009] The present invention has been made in view of the above problems, and its object is an electronic endoscope light source device for noise can be effectively removed the generated from the noise and lighting circuit for generating from a xenon lamp To provide a noise elimination structure for
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、第１請求項記載の発明は、光源としてキセノンラン
プを備えた電子内視鏡用光源装置において、上記キセノ
ンランプ及びこのキセノンランプの点灯回路をそれぞれ
の導電性のケース体に収納し、これらケース体の上面と
光源装置の導電性筐体の天板裏面との間に、電気的接触
をするために底面板及びバネ状板からなる導電性弾性体
又は導電性スポンジからなる導電性弾性体を介挿し、上
記ケース体と筐体とを同電位にしたことを特徴とする。
第２請求項記載の発明は、上記導電性弾性体を、それぞ
れのケース体の上面と筐体の天板裏面との間に複数個配
置したことを特徴とする。In order to achieve the above object, the invention according to the first aspect provides a light source device for an electronic endoscope equipped with a xenon lamp as a light source, the xenon lamp and the xenon lamp. Each lighting circuit
Conductive housed in the case body, between the top plate back surface of the conductive enclosure of the upper surface and the light source device of these case body, conductive consisting bottom plate and spring-like plate to the electrical contact Elastic body
Alternatively, a conductive elastic body made of a conductive sponge is inserted so that the case body and the casing have the same potential .
Invention of the second aspect described, the conductive elastic body, it
A plurality of them are arranged between the upper surface of the case body and the back surface of the top plate of the housing.
【００１１】上記の構成によれば、導電性の弾性体、例
えば接触面積の大きな構造のＥＭＩ（Electro-Magnetic
Interference）バネを、ケース体の上面と筐体の天板
裏面との間に複数配置することにより、ケース体と筐体
を同電位に維持することができる。従って、キセノンラ
ンプから発生するノイズや、点灯回路から発生するノイ
ズを良好に除去することが可能となり、特にＥＭＩバネ
を上面側に配置することによって外側に向けて輻射する
ノイズを確実に除去することができる。According to the above construction, a conductive elastic body, for example, an EMI (Electro-Magnetic) having a large contact area is formed.
By disposing a plurality of Interference) springs between the top surface of the case body and the back surface of the top plate of the housing, the case body and the housing can be maintained at the same potential. Therefore, it is possible to satisfactorily remove the noise generated from the xenon lamp and the noise generated from the lighting circuit. Especially, by arranging the EMI spring on the upper surface side, it is possible to reliably remove the noise radiated toward the outside. You can
【００１２】[0012]
【発明の実施の形態】図１乃至図４には、実施形態の一
例である電子内視鏡用光源装置のノイズ除去構造が示さ
れている。図１及び図３において、光源装置１０は導電
性材料の筐体１１を備えており、この筐体１１はグラウ
ンド（フレームグラウンドＧＮＤ）へ接地されている。
この筐体１１の前面パネル１２には、上述したように、
電子スコープ側のライトガイドコネクタを接続するコネ
クタ受け部１３が設けられる。1 to 4 show a noise removing structure of a light source device for an electronic endoscope, which is an example of an embodiment. 1 and 3, the light source device 10 includes a housing 11 made of a conductive material, and the housing 11 is grounded to the ground (frame ground GND).
As described above, the front panel 12 of the housing 11 has
A connector receiving portion 13 for connecting a light guide connector on the electronic scope side is provided.
【００１３】この筐体１１の内部に、冷却ファン１４を
備えたランプハウス１５が配置され、このランプハウス
１５は導電性材料からなるシールドケース体となってい
る。そして、このランプハウス１５の内部に、図４に示
されるように、キセノンランプ１７が設けられている。
このキセノンランプ１７の光は、出射口１８から上記コ
ネクタ受け部１３側へ出射される。なお、このランプハ
ウス１５は、筐体１１の底面１１Ａに一体に取り付けら
れている支持枠（金属）２０に固定ネジを介して固定さ
れる。A lamp house 15 provided with a cooling fan 14 is arranged inside the housing 11, and the lamp house 15 is a shield case body made of a conductive material. Then, as shown in FIG. 4, a xenon lamp 17 is provided inside the lamp house 15.
The light from the xenon lamp 17 is emitted from the emission port 18 toward the connector receiving portion 13 side. The lamp house 15 is fixed to a support frame (metal) 20 integrally attached to the bottom surface 11A of the housing 11 via fixing screws.
【００１４】図１及び図３において、上記のランプハウ
ス１５（キセノンランプ１７）にはリード線を介してイ
グナイター２２が接続され、このイグナイター２２にリ
ード線を介して点灯回路２３が接続される。当該例で
は、この点灯回路２３についても、導電性シールド体と
なるケース体２４で外周を覆っており、これによって点
灯回路２３のスイッチング電流により発生する高周波ノ
イズを遮蔽している。1 and 3, an igniter 22 is connected to the lamp house 15 (xenon lamp 17) via a lead wire, and a lighting circuit 23 is connected to the igniter 22 via a lead wire. In this example, the lighting circuit 23 is also covered with a case body 24 serving as a conductive shield body to shield high frequency noise generated by the switching current of the lighting circuit 23.
【００１５】上記のような光源装置のランプハウス１５
及びケース体２４の上面と、筐体１１の天板１１Ｂの裏
面との間に、ＥＭＩバネ２７を配置する。このＥＭＩバ
ネ２７は、図２に示されるように、底面板２７Ａと、撓
みにより上下伸縮を可能とするバネ状のアーチ板２７Ｂ
からなり、幅ｔをある程度大きくすることと、底面板２
７Ｂを設けること等によって接触面積を大きくするよう
になっている。このＥＭＩバネ２７は、底面板２７Ｂの
裏側に貼着部材を配置すること等（ネジ固定でもよい）
によって、ランプハウス１５及びケース体２４の上面に
取り付けられる。The lamp house 15 of the light source device as described above.
The EMI spring 27 is arranged between the upper surface of the case body 24 and the back surface of the top plate 11B of the housing 11. As shown in FIG. 2, the EMI spring 27 includes a bottom plate 27A and a spring-shaped arch plate 27B that can be vertically expanded and contracted by bending.
And the width t is increased to some extent, and the bottom plate 2
7B is provided to increase the contact area. For this EMI spring 27, an adhesive member may be arranged on the back side of the bottom plate 27B (screw fixing may be used).
Are attached to the upper surface of the lamp house 15 and the case body 24.
【００１６】一方、筐体１１の天板１１Ｂでは、錆止め
等の塗装をするが、上記ＥＭＩバネ２７の配置部分につ
いては、この塗装をしないようにしている。即ち、図３
（Ｂ）には、天板１１Ｂの裏面が示されており、上記ラ
ンプハウス１５の上面に一致する位置Ｐ−１５と、上記
ケース体２４の上面に一致する位置Ｐ−２４において、
塗装時にはＥＭＩバネ２７の配置位置の３箇所にマスキ
ング２８を取り付ける。このマスキング２８は、塗装が
終了した後に取り外すことになり、これによってマスキ
ング部の導電性を維持することができる。なお、この部
分に導電性塗装を施すようにしてもよい。On the other hand, the top plate 11B of the housing 11 is coated with rust and the like, but the EMI spring 27 is not coated with the coating. That is, FIG.
(B) shows the back surface of the top plate 11B, and at a position P-15 corresponding to the upper surface of the lamp house 15 and a position P-24 corresponding to the upper surface of the case body 24,
At the time of painting, masking 28 is attached to three positions where EMI springs 27 are arranged. The masking 28 is to be removed after the painting is completed, so that the conductivity of the masking portion can be maintained. Note that conductive coating may be applied to this portion.
【００１７】当該例は以上の構成からなり、上記ＥＭＩ
バネ２７をランプハウス１５の上面と天板１１Ｂの裏面
との間に配置すると、図４のようになる。これによれ
ば、ランプハウス１５の導電性上面と天板１１Ｂの導電
性裏面がＥＭＩバネ２７で電気的に接続されることにな
り、ネジ等を用いる場合に比べて大きな面積でランプハ
ウス１５と筐体１１とを接続することができる。しか
も、複数のＥＭＩバネ２７を配置することにより、ノイ
ズ電流が蓄積する上面部分を所定間隔で分断して、ノイ
ズ除去効率を向上させることが可能となる。The example has the above-mentioned configuration,
When the spring 27 is arranged between the upper surface of the lamp house 15 and the back surface of the top plate 11B, it becomes as shown in FIG. According to this, the conductive upper surface of the lamp house 15 and the conductive back surface of the top plate 11B are electrically connected by the EMI spring 27, and the lamp house 15 and the lamp house 15 have a large area compared to the case where a screw or the like is used. The housing 11 can be connected. Moreover, by disposing a plurality of EMI springs 27, it is possible to divide the upper surface portion where the noise current accumulates at a predetermined interval and improve the noise removal efficiency.
【００１８】また、このＥＭＩバネ２７のような導電性
弾性体を用いることによって、ランプハウス１５の上面
と天板１１Ｂの裏面の間隔が多少異なる場合、或いは何
らかの原因で天板１１Ｂの位置が変化する場合でも、良
好に対応することが可能となる。例えば、光源装置１０
の上面に物を置いたときには、図４の鎖線１００で示さ
れるように、天板１１Ｂが下がることになるが、ＥＭＩ
バネ２７が撓むことにより、ランプハウス１５と天板１
１Ｂの接触を維持することができる。By using a conductive elastic body such as the EMI spring 27, the position of the top plate 11B changes when the distance between the upper surface of the lamp house 15 and the back surface of the top plate 11B is slightly different, or for some reason. Even in the case of doing so, it becomes possible to respond favorably. For example, the light source device 10
When an object is placed on the upper surface of the table, the top plate 11B is lowered as shown by a chain line 100 in FIG.
By bending the spring 27, the lamp house 15 and the top plate 1
1B contact can be maintained.
【００１９】上記実施形態例では、ＥＭＩバネ２７を用
いる場合を説明したが、導電性弾性体として、ある程度
伸縮する導電性スポンジ等を用いることができる。In the above embodiment, the case where the EMI spring 27 is used has been described, but a conductive sponge or the like that expands and contracts to some extent can be used as the conductive elastic body.
【００２０】[0020]
【発明の効果】以上説明したように、第１請求項記載の
発明によれば、キセノンランプ及び点灯回路をそれぞれ
の導電性のケース体に収納し、これらケース体の上面と
光源装置の導電性筐体の天板裏面との間に、底面板及び
バネ状板からなる導電性弾性体又は導電性スポンジから
なる導電性弾性体を介挿し、上記ケース体と筐体とを同
電位にしたので、キセノンランプから発生するノイズと
点灯回路から発生するノイズを良好に除去することが可
能となる。As described above, according to the first aspect of the invention, the xenon lamp and the lighting circuit are respectively provided.
Housed in a conductive case body, between the top plate back surface of the conductive enclosure of the upper surface and the light source device of these case body, a bottom plate and
From a conductive elastic body or conductive sponge made of a spring plate
Interposed a becomes conductive elastic body, since the above case body and the housing has the same potential, it is possible to satisfactorily remove the noise generated from the noise and <br/> lighting circuit for generating from a xenon lamp .
【００２１】特に、上面側から外側に向けて輻射するノ
イズを確実に除去できるという利点がある。In particular, there is an advantage that noise radiated from the upper surface side to the outer side can be surely removed.
【図１】本発明の実施形態の一例に係る電子内視鏡用光
源装置のノイズ除去構造を示す斜視図である。FIG. 1 is a perspective view showing a noise removing structure of a light source device for an electronic endoscope according to an example of an embodiment of the present invention.
【図２】実施形態例で用いるＥＭＩバネを示す斜視図で
ある。FIG. 2 is a perspective view showing an EMI spring used in an example embodiment.
【図３】図１の光源装置を示し、図（Ａ）は天板を除い
たときの上面図、図（Ｂ）は天板の裏面を示す図であ
る。3A and 3B show the light source device of FIG. 1, FIG. 3A being a top view without a top plate, and FIG. 3B being a view showing the back surface of the top plate.
【図４】図１の光源装置のランプハウス部及びその内部
を示す側面図である。FIG. 4 is a side view showing a lamp house part of the light source device of FIG. 1 and an inside thereof.
【図５】従来の電子内視鏡用光源装置の構成を示す斜視
図である。FIG. 5 is a perspective view showing a configuration of a conventional light source device for an electronic endoscope.
１０ … 光源装置、 １，１１ … 筐体、 ２，１７ … キセノンランプ、 ３，１５ … ランプハウス、 ４，２２ … イグナイター、 ５，２３ … 点灯回路、 ２４ … ケース体、 ２７ … ＥＭＩバネ。 10 ... Light source device, 1,11 ... Housing, 2, 17 ... Xenon lamp, 3,15 ... Lamphouse, 4,22 ... Igniter, 5,23 ... Lighting circuit, 24… Case body, 27 ... EMI spring.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−48499（ＪＰ，Ａ) 特開 昭61−10915（ＪＰ，Ａ) 特開 平６−189894（ＪＰ，Ａ) 特開 平６−82705（ＪＰ，Ａ) 特開 平６−327631（ＪＰ，Ａ) 特開 平９−192089（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) A61B 1/00 - 1/32 G02B 23/24 - 23/26 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-48499 (JP, A) JP-A-61-10915 (JP, A) JP-A-6-189894 (JP, A) JP-A-6- 82705 (JP, A) JP-A-6-327631 (JP, A) JP-A-9-192089 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) A61B 1/00-1 / 32 G02B 23/24-23/26
Claims (2)
内視鏡用光源装置において、上記キセノンランプ及びこ
のキセノンランプの点灯回路をそれぞれの導電性のケー
ス体に収納し、これらケース体の上面と光源装置の導電
性筐体の天板裏面との間に、電気的接触をするために底
面板及びバネ状板からなる導電性弾性体又は導電性スポ
ンジからなる導電性弾性体を介挿し、上記ケース体と筐
体とを同電位にしたことを特徴とする電子内視鏡用光源
装置のノイズ除去構造。1. A electronic endoscope light source device equipped with a xenon lamp as a light source, accommodated lighting circuit of the xenon lamp and this <br/> xenon lamp to the respective conductive case member, is this between the top plate back surface of the conductive enclosure of the upper surface and the light source device of the Luo case body, the bottom to the electrical contact
Conductive elastic body or conductive support consisting of face plate and spring plate
A noise removing structure for a light source device for an electronic endoscope, characterized in that a conductive elastic body made of an elastic material is inserted, and the case body and the casing have the same potential.
体の上面と筐体の天板裏面との間に複数個配置したこと
を特徴とする第１請求項記載の電子内視鏡用光源装置の
ノイズ除去構造。2. The light source for an electronic endoscope according to claim 1, wherein a plurality of the conductive elastic bodies are arranged between the upper surface of each case body and the back surface of the top plate of the housing. Device noise removal structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09333096A JP3523749B2 (en) | 1996-03-22 | 1996-03-22 | Noise removal structure of light source device for electronic endoscope |
| US08/827,104 US5889370A (en) | 1996-03-22 | 1997-03-17 | Structure for eliminating noise in light source device for electronic endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09333096A JP3523749B2 (en) | 1996-03-22 | 1996-03-22 | Noise removal structure of light source device for electronic endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09253042A JPH09253042A (en) | 1997-09-30 |
| JP3523749B2 true JP3523749B2 (en) | 2004-04-26 |
Family
ID=14079266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09333096A Expired - Fee Related JP3523749B2 (en) | 1996-03-22 | 1996-03-22 | Noise removal structure of light source device for electronic endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3523749B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004180814A (en) * | 2002-12-02 | 2004-07-02 | Pentax Corp | Light source device for endoscope |
| JP2006191962A (en) * | 2005-01-11 | 2006-07-27 | Pentax Corp | Light source device for endoscope |
| JP5527289B2 (en) | 2011-08-10 | 2014-06-18 | ウシオ電機株式会社 | Short arc type discharge lamp |
-
1996
- 1996-03-22 JP JP09333096A patent/JP3523749B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09253042A (en) | 1997-09-30 |
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