JP3614733B2 - Portable gas detector - Google Patents

Portable gas detector Download PDF

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Publication number
JP3614733B2
JP3614733B2 JP27835899A JP27835899A JP3614733B2 JP 3614733 B2 JP3614733 B2 JP 3614733B2 JP 27835899 A JP27835899 A JP 27835899A JP 27835899 A JP27835899 A JP 27835899A JP 3614733 B2 JP3614733 B2 JP 3614733B2
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JP
Japan
Prior art keywords
gas
case
portable gas
polymer material
detection device
Prior art date
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Expired - Fee Related
Application number
JP27835899A
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Japanese (ja)
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JP2001099799A (en
Inventor
晴彦 近藤
秀二 田島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Riken Keiki KK
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Riken Keiki KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Riken Keiki KK filed Critical Riken Keiki KK
Priority to JP27835899A priority Critical patent/JP3614733B2/en
Publication of JP2001099799A publication Critical patent/JP2001099799A/en
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Description

【0001】
【発明の属する技術分野】
本発明は、電池を電源とする携帯用のガス検出装置、より詳細にはそのケース構造に関する。
【0002】
【従来の技術】
携帯用のガス検出装置は、電池を電源として環境中の大気をガスセンサーに取り込み、目的ガスの濃度を電気信号に変換してデイスプレイに表示するように構成されている。
このようなガス検出装置は、携行の便を考慮して小型化、及び軽量化を図るため、通常、ケースは高分子材料の射出成形により構成されているが、可燃性ガスの漏洩等を検査する目的に使用する場合には、ケースに帯電した静電気の放電による可燃ガスの発火が問題となる。
【0003】
【発明が解決しようとする課題】
本発明はこのような問題に鑑みてなれたものであって、その目的とするところはケースの帯電による可燃ガスの発火を防止することができる携帯用ガス検出装置を提供することである。
【0004】
【課題を解決するための手段】
このような課題を解決するために本発明においては、ガス取入口からのガスを電気信号に変換するガスセンサー、前記ガスセンサーからの信号を処理する回路基板、及び電池をケースに収容した携帯用ガス検出装置において、前記ケースが、高分子材料からなる表蓋と、裏蓋と、導電性材料からなる胴体とにより構成されている。
【0005】
【作用】
2枚の高分子製の蓋体が導電性の胴体によりそれぞれ分離されていて連続体としての高分子材料部の表面積が小さいため、可燃性ガスを発火させる程度の電荷量の静電気が生じるのを防止される。
【0006】
【発明の実施の形態】
そこで以下に本発明の詳細を図示した実施例に基づいて説明する。
図1は、本発明の携帯用ガス検出装置の一実施例を示すものであって、高分子材料からなる表蓋1と、裏蓋2と、導電性材料からなる胴体3とからなり、図2に示したように蓋体1、2を胴体3に係合爪4、5やネジ6等の固定手段により組み付けて構成されたケース内にガスセンサーや信号処理基板、及び電池が収容されている。
【0007】
ケースを構成する表蓋1にはデイスプレイ7や操作スイッチ8を取付ける窓9や孔10が、また裏蓋2には電池収容部の蓋11が設けられ、また胴体3は、アルミやマグネシウム等の軽金属や、また炭素などの導電性材料を含有した高分子材料により構成され、ガスの取り込みに適した位置にガス取入口12が形成されている。
【0008】
この実施例によれば、高分子材料製の蓋体1、2がそれぞれ導電材料からなる胴体3により分離されていて連続体としての高分子材料部の表面積が小さいため、可燃性ガスを発火させる程度の電荷の静電気が生じるのを防止することができる。
【0009】
なお、上述の実施例においては、胴体を筒胴状に形成して、開口部を蓋体で封止するようにしているが、図3に示したように胴体の一部だけを開放する窓3aを形成するように封鎖面3bを設け、窓3aを蓋体1’により封止するようにしても同様の作用を奏する。
【0010】
また、上述の実施例においては、デイスプレイ7や操作スイッチ8を蓋体1に設けているが、胴体3に設けても同様の作用を奏する。
【0011】
【発明の効果】
以上、説明したように本発明によれば、2枚の高分子製の蓋体が導電性の胴体によりそれぞれ分離されていて連続体としての高分子材料部の表面積が小さいため、可燃性ガスを発火させる程度の電荷量の静電気が生じるのを防止できる。
【図面の簡単な説明】
【図1】図(イ)乃至(ハ)は、それぞれ本発明の携帯用ガス測定装置の一実施例を示す側面図、正面図、背面図である。である。
【図2】同上装置を構成するケースを分解して示す斜視図である。
【図3】本発明の携帯用ガス検出装置を構成するケースの他の実施例を分解して示す斜視図である。
【符号の説明】
1 表蓋
2 裏蓋
3 胴体
7 デイスプレイ
8 操作スイッチ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a portable gas detection device using a battery as a power source, and more particularly to a case structure thereof.
[0002]
[Prior art]
The portable gas detection device is configured to use a battery as a power source, take in atmospheric air into a gas sensor, convert the concentration of the target gas into an electrical signal, and display it on a display.
In order to reduce the size and weight of such gas detection devices in consideration of carrying convenience, the case is usually constructed by injection molding of a polymer material, but it is inspected for leaks of combustible gas, etc. When it is used for this purpose, ignition of combustible gas due to electrostatic discharge charged in the case becomes a problem.
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of such problems, and an object of the present invention is to provide a portable gas detection device that can prevent ignition of combustible gas due to charging of a case.
[0004]
[Means for Solving the Problems]
In order to solve such problems, in the present invention, a gas sensor that converts a gas from a gas inlet into an electrical signal, a circuit board that processes a signal from the gas sensor, and a portable housing a battery in a case In the gas detection apparatus, the case includes a front cover made of a polymer material, a back cover, and a body made of a conductive material.
[0005]
[Action]
The two polymer lids are separated from each other by a conductive body, and the surface area of the polymer material portion as a continuum is small, so that static electricity with an amount of charge that ignites combustible gas is generated. Is prevented.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Therefore, details of the present invention will be described below based on the illustrated embodiment.
FIG. 1 shows an embodiment of a portable gas detection device of the present invention, which comprises a front lid 1 made of a polymer material, a back lid 2 and a body 3 made of a conductive material. As shown in FIG. 2, a gas sensor, a signal processing board, and a battery are accommodated in a case constructed by assembling the lids 1 and 2 to the body 3 by fixing means such as engaging claws 4 and 5 and screws 6. Yes.
[0007]
The front cover 1 constituting the case is provided with a window 9 and a hole 10 for attaching the display 7 and the operation switch 8, the back cover 2 is provided with a cover 11 for a battery housing portion, and the body 3 is made of aluminum, magnesium, or the like. A gas inlet 12 is formed at a position suitable for gas uptake, which is made of a light metal or a polymer material containing a conductive material such as carbon.
[0008]
According to this embodiment, the lids 1 and 2 made of a polymer material are separated from each other by the body 3 made of a conductive material, and the surface area of the polymer material part as a continuous body is small, so that a combustible gas is ignited. It is possible to prevent static electricity having a degree of charge.
[0009]
In the above-described embodiment, the body is formed in a cylindrical body shape, and the opening is sealed with a lid. However, as shown in FIG. 3, a window that opens only a part of the body is opened. Even if the sealing surface 3b is provided so as to form 3a and the window 3a is sealed by the lid 1 ', the same effect is obtained.
[0010]
Further, in the above-described embodiment, the display 7 and the operation switch 8 are provided on the lid 1.
[0011]
【The invention's effect】
As described above, according to the present invention, as described, two polymer made lid polymeric material unit surface area small fry of as a continuum be separated respectively by the body of a conductive, combustible gases It is possible to prevent the generation of static electricity with an amount of charge that can ignite.
[Brief description of the drawings]
FIGS. 1A to 1C are a side view, a front view, and a rear view, respectively, showing an embodiment of a portable gas measuring device of the present invention. It is.
FIG. 2 is an exploded perspective view showing a case constituting the apparatus.
FIG. 3 is an exploded perspective view showing another embodiment of the case constituting the portable gas detection device of the present invention.
[Explanation of symbols]
1 Front cover 2 Back cover 3 Body 7 Display 8 Operation switch

Claims (1)

ガス取入口からのガスを電気信号に変換するガスセンサー、前記ガスセンサーからの信号を処理する回路基板、及び電池をケースに収容した携帯用ガス検出装置において、
前記ケースが、高分子材料からなる表蓋と、高分子材料からなる裏蓋と、導電性材料からなる筒胴状の胴体とにより構成されている携帯用ガス検出装置。
In a gas sensor that converts gas from a gas inlet into an electrical signal, a circuit board that processes a signal from the gas sensor, and a portable gas detection device that houses a battery in a case,
A portable gas detection device, wherein the case is constituted by a front cover made of a polymer material, a back cover made of a polymer material , and a cylindrical body made of a conductive material.
JP27835899A 1999-09-30 1999-09-30 Portable gas detector Expired - Fee Related JP3614733B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27835899A JP3614733B2 (en) 1999-09-30 1999-09-30 Portable gas detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27835899A JP3614733B2 (en) 1999-09-30 1999-09-30 Portable gas detector

Publications (2)

Publication Number Publication Date
JP2001099799A JP2001099799A (en) 2001-04-13
JP3614733B2 true JP3614733B2 (en) 2005-01-26

Family

ID=17596234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27835899A Expired - Fee Related JP3614733B2 (en) 1999-09-30 1999-09-30 Portable gas detector

Country Status (1)

Country Link
JP (1) JP3614733B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020079248A (en) * 2001-04-14 2002-10-19 주식회사 대본전자산업 Leak detector for combustible gas uering a handing
US8537020B2 (en) * 2008-12-23 2013-09-17 Honeywell International Inc. Visual indicator of gas sensor impairment

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