JP2009058376A - Liquid level detector - Google Patents

Liquid level detector Download PDF

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JP2009058376A
JP2009058376A JP2007225941A JP2007225941A JP2009058376A JP 2009058376 A JP2009058376 A JP 2009058376A JP 2007225941 A JP2007225941 A JP 2007225941A JP 2007225941 A JP2007225941 A JP 2007225941A JP 2009058376 A JP2009058376 A JP 2009058376A
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liquid level
circuit board
level detection
contact
detection device
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JP5019044B2 (en
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Shigeki Koide
茂樹 小出
Yoshiyuki Shimazaki
義之 島崎
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Priority to JP2007225941A priority Critical patent/JP5019044B2/en
Priority to PCT/JP2008/064775 priority patent/WO2009028359A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/36—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using electrically actuated indicating means

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid level detector excellent in the assembly workability, and improving the electrical reliability. <P>SOLUTION: The liquid level detector includes: a circuit board having a resistor; a conduction terminal having a slide contact section sliding on the circuit board; a rotor for holding the circuit board, and moved based on a displacement of a liquid level; and a case for holding the conduction terminal. An attachment section is provided in the case, and fixed to an attachment member provided in an accommodation member for accommodating an object to be measured. A contact section is provided in the conduction terminal, and exposed from the case. When the attachment section is fixed to the attachment member, the contact section electrically contacts an external extraction terminal section provided in the attachment member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、燃料タンク内の液面を検出する液面検出装置に関する。   The present invention relates to a liquid level detection device that detects a liquid level in a fuel tank.

従来の液面検出装置は、特許文献１に開示されるものが知られている。この液面検出装置は、抵抗体を備えた回路基板と、前記回路基板上を摺動する摺動接点部を備えた通電端子と、前記回路基板を保持するとともに液面の変位に基づいて動く回転体であるアームホルダと、前記通電端子を保持するケース体と、を備えたものである。このような液面検出装置は、フューエルポンプモジュールやステーなどの取付部材に取り付けられ、液面検出装置の前記通電端子と、前記フューエルポンプモジュールや取付部材に設けられる外部端子と、を配線コードによって電気的に接続し、前記液面検出装置の出力を外部の伝達するものである。
特開２００４−３５４３１０号公報 As a conventional liquid level detection device, one disclosed in Patent Document 1 is known. The liquid level detection device holds a circuit board having a resistor, a current-carrying terminal having a sliding contact portion that slides on the circuit board, and moves based on displacement of the liquid level. An arm holder that is a rotating body and a case body that holds the energization terminal are provided. Such a liquid level detection device is attached to an attachment member such as a fuel pump module or a stay, and the energization terminal of the liquid level detection device and an external terminal provided on the fuel pump module or the attachment member are connected by a wiring cord. It is electrically connected to transmit the output of the liquid level detection device to the outside.
JP 2004-354310 A

従来の液面検出装置には、前記配線コードを用いて前記通電端子と外部端子とを接続するため、組み付け作業性が悪いといった問題点があった。また、電気的な接続箇所が多く、電気的な信頼性を低下させてしまうといった問題点を有している。   The conventional liquid level detection device has a problem in that assembly workability is poor because the current-carrying terminal and the external terminal are connected using the wiring cord. In addition, there are many electrical connection points, and there is a problem that electrical reliability is lowered.

そこで、本発明は前述した問題点に着目し、組み付け作業性に優れ、また電気的な信頼性を向上させることが可能な液面検出装置を提供することを目的とする   Accordingly, the present invention focuses on the above-described problems, and an object thereof is to provide a liquid level detection device that is excellent in assembly workability and can improve electrical reliability.

本発明は、抵抗体を備えた回路基板と、前記回路基板上を摺動する摺動接点部を備えた通電端子と、前記回路基板を保持するとともに液面の変位に基づいて動く回転体と、前記通電端子を保持するケース体と、を備えた液面検出装置であって、被測定対象を収納する収納部材に設けた取付部材に固定するための取付部を前記ケース体に設け、前記ケース体から露出する接点部を前記通電端子に設け、前記取付部を前記取付部材に固定するときに前記接点部が前記取付部材に設けた外部取出端子部と電気的に接続するものである。   The present invention includes a circuit board provided with a resistor, an energizing terminal provided with a sliding contact portion that slides on the circuit board, a rotating body that holds the circuit board and moves based on displacement of a liquid level, A liquid level detecting device having a case body for holding the energization terminal, wherein the case body is provided with an attachment portion for fixing to an attachment member provided on a housing member for housing the object to be measured, A contact portion exposed from the case body is provided on the energizing terminal, and when the attachment portion is fixed to the attachment member, the contact portion is electrically connected to an external lead terminal portion provided on the attachment member.

また、本発明は、前記通電端子は、前記摺動接点部と前記接点部とを同一材料にて形成したものである。   In the present invention, the energizing terminal is formed by forming the sliding contact portion and the contact portion with the same material.

また、本発明は、前記接点部は、折り曲げて形成したものである。   In the present invention, the contact portion is formed by bending.

また、本発明は、前記通電端子は、前記接点部が前記摺動接点部より厚い板状の材料にて形成したものである。   In the present invention, the energization terminal is formed of a plate-like material in which the contact portion is thicker than the sliding contact portion.

本発明によれば、所期の目的を達成でき、組み付け作業性に優れ、また電気的な信頼性を向上させることが可能な液面検出装置を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the liquid level detection apparatus which can achieve the intended objective, is excellent in assembly workability | operativity, and can improve electrical reliability can be provided.

以下、添付図面を用いて本発明の第１実施形態を説明する。   Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.

本実施形態の液面検出装置１は、液面に浮く図示しないフロートと、前記フロートをその端部に備えたフロートアーム２と、抵抗体５ａ、５ｂを備えた回路基板５と、回路基板５上を摺動する摺動接点部６、７を備えた通電端子８、９と、フロートアーム２と回路基板５とを保持するとともに液面の変位に基づいて動く回転体であるアームホルダ３と、通電端子８、９を保持するケース体であるフレーム４とを備えている。なお、フレーム４は、フロートアーム２とアームホルダ３とを回動可能に支持するものである。   The liquid level detection device 1 of the present embodiment includes a float (not shown) that floats on the liquid level, a float arm 2 that includes the float at an end thereof, a circuit board 5 that includes resistors 5a and 5b, and a circuit board 5 Energizing terminals 8 and 9 having sliding contact portions 6 and 7 that slide on the upper side, an arm holder 3 that is a rotating body that holds the float arm 2 and the circuit board 5 and moves based on the displacement of the liquid level And a frame 4 that is a case body for holding the current-carrying terminals 8 and 9. The frame 4 supports the float arm 2 and the arm holder 3 so as to be rotatable.

なお、１０は、油などの液体である被測定対象、本実施形態では、ガソリンや軽油などの液体燃料を収納する収納部材である燃料タンクである。燃料タンク１０は、金属や合成樹脂から構成されている。１１は、液面検出装置１を燃料タンク１０に固定するための取付部材である。１２は、液面検出装置１の通電端子８、９と接触して電気的に接続する金属からなる外部取出端子部である。   Reference numeral 10 denotes an object to be measured which is a liquid such as oil, and in this embodiment, a fuel tank which is a storage member that stores liquid fuel such as gasoline or light oil. The fuel tank 10 is made of metal or synthetic resin. Reference numeral 11 denotes an attachment member for fixing the liquid level detection device 1 to the fuel tank 10. Reference numeral 12 denotes an external extraction terminal portion made of a metal that is in contact with and electrically connected to the current-carrying terminals 8 and 9 of the liquid level detection device 1.

フロートアーム２は剛性を有する金属製のワイヤであり、一端に前記フロートを備えており、他端側に折り曲げて形成した端部２ａを備えている。この端部２ａは、フロートアーム２が回動する中心となるものである。   The float arm 2 is a metal wire having rigidity, and includes the float at one end and an end 2a formed by bending the other end. The end 2a is the center around which the float arm 2 rotates.

アームホルダ３は合成樹脂からなり、本実施形態では、円盤形状である。そして、フロートアーム２と回路基板５を保持するものである。アームホルダ３は、フロートアーム２の端部２ａが貫通する孔３ａを備えている。また、孔３ａに対応するように、アームホルダ３の背面に円筒形の軸部３ｂを備えている。そして、この軸部３ｂの先端には、係止爪３ｃを備えた弾性変形可能な係止片３ｄが２つ設けられている。この係止爪３ｃを備えた係止片３ｄは、アームホルダ３をフレーム４に回動可能に取り付けるものである。   The arm holder 3 is made of a synthetic resin and has a disk shape in the present embodiment. The float arm 2 and the circuit board 5 are held. The arm holder 3 includes a hole 3a through which the end 2a of the float arm 2 passes. Further, a cylindrical shaft portion 3b is provided on the back surface of the arm holder 3 so as to correspond to the hole 3a. Two elastically deformable locking pieces 3d having locking claws 3c are provided at the tip of the shaft portion 3b. The locking piece 3d provided with the locking claw 3c attaches the arm holder 3 to the frame 4 so as to be rotatable.

アームホルダ３の上面には、逆さＬの字形状のアーム保持部３ｅが２つ形成されている。このアーム保持部３ｅは、フロートアーム２の周囲を挟んで固定するものである。このアーム保持部３ｅは弾性変形可能であり、アーム保持部３ｅに設けたフロートアーム２の直径より小さい開口３ｆを備えており、この開口３ｆからフロートアーム２を挟み込ませて固定するものである。なお、アーム保持部３ｅは２つ形成されているが、フロートアーム２の固定には、どちらか一方を使用すればよく、どちらのアーム保持部３ｅを使用するかは、本発明の液面検出装置１の使用条件によって適宜選択すればよい。   Two arm holding portions 3e having an inverted L shape are formed on the upper surface of the arm holder 3. The arm holding portion 3e is fixed with the periphery of the float arm 2 interposed therebetween. The arm holding portion 3e is elastically deformable and includes an opening 3f smaller than the diameter of the float arm 2 provided in the arm holding portion 3e. The float arm 2 is sandwiched and fixed from the opening 3f. Although two arm holding portions 3e are formed, either one may be used to fix the float arm 2, and which arm holding portion 3e is used depends on the liquid level detection of the present invention. What is necessary is just to select suitably according to the use conditions of the apparatus 1. FIG.

また、アームホルダ３の外周部には、フレーム４側に伸びる壁３ｇが形成されている。そして、この壁３ｇの一部に、外側に突出する突起３ｈが形成されている。この突起３ｈはフレーム４に当接して、アームホルダ３の回動範囲が規制される。   Further, a wall 3g extending to the frame 4 side is formed on the outer periphery of the arm holder 3. A protrusion 3h protruding outward is formed on a part of the wall 3g. The protrusion 3h abuts on the frame 4, and the rotation range of the arm holder 3 is restricted.

また、アームホルダ３の背面には、回路基板５の固定位置を決めるための位置決め壁部３ｉが形成されており、この位置決め壁部３ｉは、回路基板５の周囲を囲むように設けられている。また、この位置決め壁部３ｉ内には、回路基板５の表面がアームホルダ３の背面とほぼ同一の高さとなるように、底上げ用の壁３ｊが形成されている。また、アームホルダ３には、回路基板５を固定するために、爪３ｋを備えた弾性片３ｍを２つ備えており、この２つの爪３ｋを備えた弾性片３ｍが、回路基板５を弾性片３ｍを設けていない側の位置決め壁部３ｉに押さえつけている。   A positioning wall 3 i for determining the fixing position of the circuit board 5 is formed on the back surface of the arm holder 3, and the positioning wall 3 i is provided so as to surround the circuit board 5. . In addition, a wall 3j for raising the bottom is formed in the positioning wall 3i so that the surface of the circuit board 5 has substantially the same height as the back surface of the arm holder 3. The arm holder 3 is provided with two elastic pieces 3m provided with claws 3k to fix the circuit board 5, and the elastic pieces 3m provided with the two claws 3k It is pressed against the positioning wall 3i on the side where the piece 3m is not provided.

フレーム４は合成樹脂からなり、本実施形態では、アームホルダ３と同一の材質で形成されている。このフレーム４は、この液面検出装置１を燃料タンク１０内に固定するために設けたステーなどの取付部材に固定されるものである。フレーム４には、アームホルダ３を回動可能に取り付けるために、中央に貫通孔からなる軸受部４ｂを備えた円筒状の突出部４ａが設けられている。フレーム４の背面の軸受部４ｂの開口部は、アームホルダ３の係止爪３ｃが係止される係合部４ｃとなっている。   The frame 4 is made of a synthetic resin, and is formed of the same material as that of the arm holder 3 in this embodiment. The frame 4 is fixed to an attachment member such as a stay provided for fixing the liquid level detection device 1 in the fuel tank 10. The frame 4 is provided with a cylindrical projecting portion 4a having a bearing portion 4b formed of a through hole at the center for mounting the arm holder 3 so as to be rotatable. The opening of the bearing portion 4b on the back surface of the frame 4 serves as an engaging portion 4c to which the locking claw 3c of the arm holder 3 is locked.

また、フレーム４には、本実施形態では四角形であり、その四隅にそれぞれ突部４ｄを備えている。この突部４ｄのうち２つが、アームホルダ３の突起３ｈが当接する回動規制部であり、アームホルダ３の回動を規制するものである。また、この突部４ｄを結ぶように、壁４ｅがフレーム４の周囲に設けられている。この壁４ｅとアームホルダ３の壁３ｇとは当接可能であり、アームホルダ３が回転したときに、過度のブレを抑えるものである。また、フレーム４には、通電端子８、９がインサート成形によって埋め込まれて固定されている。   Further, the frame 4 has a quadrangular shape in the present embodiment, and has protrusions 4d at the four corners. Two of the protrusions 4d are rotation restricting portions with which the protrusions 3h of the arm holder 3 abut, and restrict the rotation of the arm holder 3. A wall 4e is provided around the frame 4 so as to connect the protrusions 4d. The wall 4e and the wall 3g of the arm holder 3 can be brought into contact with each other, and excessive blurring is suppressed when the arm holder 3 rotates. Further, the current terminals 8 and 9 are embedded and fixed to the frame 4 by insert molding.

また、フレーム４には、燃料タンク１０内に設けた取付部材１１に固定するための取付部４ｆを備えている。本実施形態では、取付部４ｆは、２つ設けられている。この取付部４ｆは、フレーム４に一体に形成されており、その先端に係止爪４ｇを備えた弾性片である。この係止爪４ｇを取付部材１１に係止して、液面検出装置１を取付部材１１に固定する。   Further, the frame 4 is provided with an attachment portion 4 f for fixing to the attachment member 11 provided in the fuel tank 10. In the present embodiment, two attachment portions 4f are provided. The attachment portion 4f is an elastic piece that is formed integrally with the frame 4 and that has a locking claw 4g at its tip. The locking claw 4 g is locked to the mounting member 11, and the liquid level detection device 1 is fixed to the mounting member 11.

回路基板５は硬質の回路基板であり、本実施形態ではセラミックを用いている。この回路基板５の中央部には、貫通孔５ｃが形成されている。この貫通孔５ｃはアームホルダ３の軸部３ｂとフレーム４の突出部４ａが貫通するものである。そして、回路基板５はアームホルダ３に形成した位置決め壁部３ｉ内に収納され、そして、弾性片３ｍに設けられた爪３ｈによって、アームホルダ３に固定されている。   The circuit board 5 is a hard circuit board, and ceramic is used in this embodiment. A through hole 5 c is formed at the center of the circuit board 5. The through hole 5c is formed through the shaft portion 3b of the arm holder 3 and the protruding portion 4a of the frame 4. The circuit board 5 is housed in a positioning wall 3i formed on the arm holder 3, and is fixed to the arm holder 3 by a claw 3h provided on the elastic piece 3m.

回路基板５上には２つの抵抗体５ａ、５ｂが設けられている。この抵抗体５ａ、５ｂは酸化ルテニウムなどから構成されている。そして、この抵抗体５ａ、５ｂと接続する電極５ｄが設けられている。この電極５ｄの材質は銀パラジウム合金などによって形成されている。この電極５ｄは、詳しくは図示していないが、それぞれ独立しており、抵抗体５ａ、５ｂによって接続されている。この電極５ｄは、通電端子９の第２の接点７が摺動する第１の摺動路を形成している。   Two resistors 5 a and 5 b are provided on the circuit board 5. The resistors 5a and 5b are made of ruthenium oxide or the like. An electrode 5d connected to the resistors 5a and 5b is provided. The electrode 5d is made of a silver palladium alloy or the like. Although not shown in detail, the electrodes 5d are independent of each other and are connected by resistors 5a and 5b. The electrode 5d forms a first sliding path through which the second contact 7 of the energizing terminal 9 slides.

また、回路基板５上には、電極５ｄと電気的に接続された電極５ｅが形成されている。この電極５ｅも電極５ｄと同一の材料で形成されている。この電極５ｅは、通電端子８の第１の接点６が摺動する第２の摺動路を形成している。本実施形態では、電極５ｄと電極５ｅとの間に抵抗体５ｆを設けている。この抵抗体５ｆも抵抗体５ａ、５ｂと同一の材料で形成されている。第１、第２の接点６、７が接触する電極５ｄ、５ｅの形状は、回路基板５がアームホルダ３とともに回転する回転中心に対して点対称の形状であり、また、この回路基板５が長方形であるため、この回路基板５を１８０度反転させて取り付けても、液面の検出には何ら問題がないため、回路基板５の組み付けに関しては、誤って組み付けるという問題は発生しない。   An electrode 5e electrically connected to the electrode 5d is formed on the circuit board 5. The electrode 5e is also formed of the same material as the electrode 5d. The electrode 5e forms a second sliding path through which the first contact 6 of the energizing terminal 8 slides. In the present embodiment, a resistor 5f is provided between the electrode 5d and the electrode 5e. The resistor 5f is also formed of the same material as the resistors 5a and 5b. The shape of the electrodes 5d and 5e with which the first and second contacts 6 and 7 are in contact is a point-symmetric shape with respect to the rotation center where the circuit board 5 rotates together with the arm holder 3, and the circuit board 5 Since it is rectangular, even if the circuit board 5 is inverted 180 degrees and attached, there is no problem in detecting the liquid level, so that there is no problem of incorrect circuit board assembly.

また、この回路基板５の電極５ｄ、５ｅを設けた面はフレーム４に対向しており、結果的に、フレーム４で覆われ、電極５ｄ、５ｅを設けた側が外部に露出していないために、他の部品による接触を防止し、電極５ｄ、５ｅの断線などを防止することができる。   Further, the surface of the circuit board 5 on which the electrodes 5d and 5e are provided faces the frame 4, and as a result, is covered with the frame 4 and the side on which the electrodes 5d and 5e are provided is not exposed to the outside. The contact by other components can be prevented, and disconnection of the electrodes 5d and 5e can be prevented.

通電端子８、９は、それぞれに摺動接点部である第１、第２の接点６、７を備えている。また、通電端子８、９は、それぞれに接点部１３、１４を備えている。   The energization terminals 8 and 9 include first and second contacts 6 and 7 which are sliding contact portions, respectively. The energizing terminals 8 and 9 are provided with contact portions 13 and 14 respectively.

通電端子８、９は板状で、その材質は本実施形態では洋白からなる。第１、第２の接点６、７は複数の接触点を備えており、本実施形態ではそれぞれ３つ備えている。また、第１、第２の接点６、７が良好に電極５ｅ、５ｄに接触するために、通電端子８、９の中程で、図４中左方向に折り曲げられている。また、第１、第２の接点６、７が電極５ｅ、５ｄを良好に摺動できるように、その先端部が図４で示すように、断面形状が左方向に突出した円弧状に折り曲げられている。この通電端子８、９の弾性の力によって、アームホルダ３は、その回転軸方向に対して、フレーム４から離れる方向に押されている。   The energization terminals 8 and 9 are plate-shaped, and the material thereof is white in this embodiment. The first and second contacts 6 and 7 have a plurality of contact points, and in the present embodiment, three each. Further, the first and second contacts 6 and 7 are bent in the left direction in FIG. 4 in the middle of the energization terminals 8 and 9 in order to make good contact with the electrodes 5e and 5d. In addition, as shown in FIG. 4, the front end portion of the first and second contacts 6 and 7 is bent into an arc shape protruding leftward so that the electrodes 5 e and 5 d can slide well. ing. The arm holder 3 is pushed in a direction away from the frame 4 with respect to the rotation axis direction by the elastic force of the energization terminals 8 and 9.

また、接点部１３、１４は、フレーム４から露出しており、第１、第２の接点６、７とは異なり、接触点は単一である。また、接点部１３、１４が良好に外部取出端子部１２に接触するために、通電端子８、９の中程で、図４中右方向に折り曲げられている。また、接点部１３、１４は、その先端側が図４中左方向に折り曲げられている。この通電端子８、９の弾性の力によって、接点部１３、１４は、外部取出端子部１２に充分な接触圧にて接触する。また、フレーム４に設けた２つの取付部４ｆの間に、接点部１３、１４を設けてある。このように構成したことによって、接点部１３、１４と外部取出端子部１２とを確実に接続することができる。   Further, the contact portions 13 and 14 are exposed from the frame 4, and unlike the first and second contacts 6 and 7, there is a single contact point. In addition, the contact portions 13 and 14 are bent in the right direction in FIG. 4 in the middle of the energization terminals 8 and 9 in order to make good contact with the external extraction terminal portion 12. Further, the contact portions 13 and 14 are bent in the left direction in FIG. Due to the elastic force of the energizing terminals 8 and 9, the contact portions 13 and 14 come into contact with the external extraction terminal portion 12 with a sufficient contact pressure. Further, contact portions 13 and 14 are provided between the two attachment portions 4 f provided on the frame 4. By comprising in this way, the contact parts 13 and 14 and the external extraction terminal part 12 can be connected reliably.

この通電端子８、９は、外部取出端子部１２と電気的に接続し、図示しない外部回路などに接続される。   The energization terminals 8 and 9 are electrically connected to the external extraction terminal portion 12 and are connected to an external circuit (not shown).

この液面検出装置１は、前記フロートの変動に伴いフロートアーム２とアームホルダ３が回動する。これによって、アームホルダ３に固定された回路基板５が回動する。この回動に伴い、第１の接点６が電極５ｅの少なくとも１つと接触する。これによって、抵抗体５ａ、５ｂの抵抗値を変化させた電気信号を前記外部回路に出力するものである。   In the liquid level detection device 1, the float arm 2 and the arm holder 3 rotate with the fluctuation of the float. As a result, the circuit board 5 fixed to the arm holder 3 rotates. Along with this rotation, the first contact 6 comes into contact with at least one of the electrodes 5e. As a result, an electrical signal in which the resistance values of the resistors 5a and 5b are changed is output to the external circuit.

取付部材１１は、合成樹脂からなり、燃料タンク１０に設けた開口１０ａを塞ぐ蓋部１１ａと一体に形成されている。取付部材１１は、蓋部１１ａに対して垂直方向に突出形成されている。取付部材１１は、液面検出装置１のフレーム４に設けた取付部４ｆが係止する貫通孔１１ｂを備えている。   The attachment member 11 is made of a synthetic resin, and is formed integrally with a lid portion 11 a that closes an opening 10 a provided in the fuel tank 10. The attachment member 11 is formed so as to protrude in a direction perpendicular to the lid portion 11a. The attachment member 11 includes a through hole 11b that is engaged with an attachment portion 4f provided on the frame 4 of the liquid level detection device 1.

また、取付部材１１には、外部取出端子部１２が内蔵されている。この取付部材１１に内蔵された外部取出端子部１２が露出する開口１１ｃが設けられている。この開口１１ｃを介して、通電端子８、９と外部取出端子部１２とが接触する。   Further, the attachment member 11 has an external extraction terminal portion 12 built therein. An opening 11c is provided through which the external lead terminal portion 12 built in the mounting member 11 is exposed. The current-carrying terminals 8 and 9 and the external extraction terminal portion 12 are in contact with each other through the opening 11c.

なお、１１ｄは、コネクタであり、蓋部１１ａに一体に形成されている。このコネクタ１１ｄを介して、図示しない外部回路などに接続される。   In addition, 11d is a connector and is formed integrally with the lid portion 11a. The connector 11d is connected to an external circuit (not shown) or the like.

以上のように構成した液面検出装置１を取付部材１１に固定するのは、液面検出装置１のフレーム４に設けた取付部４ｆを取付部材１１に設けた貫通孔１１ｂに挿入して、取付部４ｆの先端に設けた係止爪４ｇを貫通孔１１ｂの周囲に係止し固定する。   The liquid level detection device 1 configured as described above is fixed to the attachment member 11 by inserting the attachment portion 4f provided in the frame 4 of the liquid level detection device 1 into the through hole 11b provided in the attachment member 11. The locking claw 4g provided at the tip of the mounting portion 4f is locked and fixed around the through hole 11b.

液面検出装置１を取付部材１１に固定するときに、液面検出装置１の通電端子８、９の接点部１３、１４が取付部材１１に設けた外部取出端子部１２と接触し、接点部１３、１４と外部取出端子部１２とが電気的に接続する。   When the liquid level detection device 1 is fixed to the mounting member 11, the contact portions 13 and 14 of the energization terminals 8 and 9 of the liquid level detection device 1 come into contact with the external extraction terminal portion 12 provided on the mounting member 11, 13 and 14 and the external extraction terminal part 12 are electrically connected.

以上のように構成したことによって、従来のような配線コードを不要とすることができ、組み付け作業性に優れ、また電気的な信頼性を向上させることが可能な液面検出装置を提供することができる。   By configuring as described above, it is possible to provide a liquid level detection device that can eliminate the need for a conventional wiring cord, has excellent assembly workability, and can improve electrical reliability. Can do.

また、通電端子８、９は、摺動接点部６、７と接点部１３、１４とを同一材料にて形成したことによって、コストを削減することができる。   The energization terminals 8 and 9 can reduce the cost by forming the sliding contact portions 6 and 7 and the contact portions 13 and 14 from the same material.

次に本発明の第２実施形態を、図８を用いて説明する。なお、前記各実施形態と同一および相当個所には同一符号を付して、その詳細な説明は省略する。   Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same and equivalent part as each said embodiment, and the detailed description is abbreviate | omitted.

摺動する摺動接点部６、７と回路基板５の電極５ｄ、５ｅとの接触圧は、むやみに高くすると、摺動接点部６、７や電極５ｄ、５ｅの摩耗などの問題が発生するが、押し当てて接触する接点部１３ａ、１４ａと外部取出端子部１２との接触圧は高く設定したほうが良好な電気的な接続を得ることができる。本実施形態では、接点部１３ａ、１４ａと外部取出端子部１２との接触圧は高くするために、板状の金属を折り曲げて接点部１３ａ、１４ａの厚さを増し、接点部１３ａ、１４ａの剛性を上げたものである。このように構成したことによって、接点部１３ａ、１４ａと外部取出端子部１２との接触圧を高めることができ、確実な電気的接続を行うことができる。   If the contact pressure between the sliding contact portions 6 and 7 that slide and the electrodes 5d and 5e of the circuit board 5 is increased excessively, problems such as wear of the sliding contact portions 6 and 7 and the electrodes 5d and 5e occur. However, it is possible to obtain better electrical connection when the contact pressure between the contact portions 13a, 14a and the external extraction terminal portion 12 that are pressed and contacted is set high. In the present embodiment, in order to increase the contact pressure between the contact portions 13a, 14a and the external lead terminal portion 12, the thickness of the contact portions 13a, 14a is increased by bending a plate-like metal, and the contact portions 13a, 14a Increased rigidity. By comprising in this way, the contact pressure of contact part 13a, 14a and the external extraction terminal part 12 can be raised, and reliable electrical connection can be performed.

また、接点部１３、１４と外部取出端子部１２との接触圧を高くするために、接点部１３、１４の剛性を上げるには、他の実施形態として、接点部１３、１４が摺動接点部６、７より厚い板状の材料にて形成したものであってもよい。このように構成しても、接点部１３、１４の剛性を高め、接点部１３、１４と外部取出端子部１２との接触圧を高めることができ、確実な電気的接続を行うことができる。   In order to increase the rigidity of the contact portions 13 and 14 in order to increase the contact pressure between the contact portions 13 and 14 and the external extraction terminal portion 12, as another embodiment, the contact portions 13 and 14 are sliding contacts. It may be formed of a plate-like material thicker than the parts 6 and 7. Even if comprised in this way, the rigidity of the contact parts 13 and 14 can be improved, the contact pressure of the contact parts 13 and 14 and the external extraction terminal part 12 can be raised, and reliable electrical connection can be performed.

なお、前記各実施形態では、取付部材１１は、液面検出装置１を取り付ける専用部品であったが、前記実施形態に限定されるものではなく、燃料供給ポンプを収納するケースなどと兼用したものであってもよい。   In each of the above embodiments, the mounting member 11 is a dedicated component for mounting the liquid level detection device 1. However, the mounting member 11 is not limited to the above embodiment, and is also used as a case for housing a fuel supply pump. It may be.

本発明の第１実施形態の正面図。The front view of 1st Embodiment of this invention. 同実施形態の側面図。The side view of the embodiment. 図１中Ａ−Ａ線の断面図。Sectional drawing of the AA line in FIG. 図１中Ｂ−Ｂ線の断面図。Sectional drawing of the BB line in FIG. 図１中Ｃ−Ｃ線の断面図。Sectional drawing of CC line in FIG. 同実施形態のフレーム（ケース体）の正面図。The front view of the flame | frame (case body) of the embodiment. 同実施形態のホルダ（回転体）の背面図。The rear view of the holder (rotary body) of the embodiment. 本発明の第２実施形態の断面図。Sectional drawing of 2nd Embodiment of this invention.

符号の説明Explanation of symbols

１ 液面検出装置
２ フロートアーム
２ａ 端部
３ 回転体（アームホルダ）
３ａ 孔
３ｂ 軸部
３ｃ 係止爪
３ｄ 係止片
３ｅ アーム保持部
３ｆ 開口
３ｇ 壁
３ｈ 突起（被回動規制部）
３ｉ 位置決め壁部
３ｊ 底上げ用の壁
３ｋ 爪
３ｍ 弾性片
４ ケース体（フレーム）
４ａ 突出部
４ｂ 軸受部
４ｃ 開口部（係合部）
４ｄ 突部（回動規制部）
４ｅ 壁
４ｆ 取付部
４ｇ 係止爪
５ 回路基板
５ａ、５ｂ 抵抗体
５ｃ 貫通孔
５ｄ、５ｅ 電極
５ｆ 抵抗体
６ 摺動接点部（第１の接点）
７ 摺動接点部（第２の接点）
８、９ 通電端子
１０ 収納部材（燃料タンク）
１０ａ 開口
１１ 取付部材
１１ａ 蓋部
１１ｂ 貫通孔
１１ｃ 開口
１１ｄ コネクタ
１２ 外部取出端子部
１３、１３ａ、１４、１４ａ 接点部 DESCRIPTION OF SYMBOLS 1 Liquid level detection apparatus 2 Float arm 2a End part 3 Rotating body (arm holder)
3a hole 3b shaft portion 3c locking claw 3d locking piece 3e arm holding portion 3f opening 3g wall 3h protrusion (rotation restricted portion)
3i Positioning wall 3j Wall for raising the bottom 3k Claw 3m Elastic piece 4 Case body (frame)
4a Protruding part 4b Bearing part 4c Opening part (engaging part)
4d protrusion (rotation restricting portion)
4e Wall 4f Mounting part 4g Locking claw 5 Circuit board 5a, 5b Resistor 5c Through hole 5d, 5e Electrode 5f Resistor 6 Sliding contact part (first contact)
7 Sliding contact (second contact)
8, 9 Energizing terminal 10 Storage member (fuel tank)
10a Opening 11 Mounting member 11a Lid 11b Through-hole 11c Opening 11d Connector 12 External extraction terminal part 13, 13a, 14, 14a Contact part

Claims (4)

抵抗体を備えた回路基板と、前記回路基板上を摺動する摺動接点部を備えた通電端子と、前記回路基板を保持するとともに液面の変位に基づいて動く回転体と、前記通電端子を保持するケース体と、を備えた液面検出装置であって、被測定対象を収納する収納部材に設けた取付部材に固定するための取付部を前記ケース体に設け、前記ケース体から露出する接点部を前記通電端子に設け、前記取付部を前記取付部材に固定するときに前記接点部が前記取付部材に設けた外部取出端子部と電気的に接続することを特徴とする液面検出装置。 A circuit board provided with a resistor, an energizing terminal provided with a sliding contact portion that slides on the circuit board, a rotating body that holds the circuit board and moves based on displacement of the liquid surface, and the energizing terminal A liquid level detection device comprising: a case body for holding a measurement object, wherein the case body is provided with a mounting portion for fixing to a mounting member provided on a storage member for storing a measurement target, and is exposed from the case body The liquid level detection is characterized in that a contact portion is provided on the energizing terminal, and the contact portion is electrically connected to an external lead terminal portion provided on the mounting member when the mounting portion is fixed to the mounting member. apparatus. 前記通電端子は、前記摺動接点部と前記接点部とを同一材料にて形成したことを特徴とする請求項１に記載の液面検出装置。 The liquid level detection device according to claim 1, wherein the energization terminal is formed of the same material for the sliding contact portion and the contact portion. 前記接点部は、折り曲げて形成したことを特徴とする請求項２に記載の液面検出装置。 The liquid level detection device according to claim 2, wherein the contact portion is formed by being bent. 前記通電端子は、前記接点部が前記摺動接点部より厚い板状の材料にて形成したことを特徴とする請求項１に記載の液面検出装置。 The liquid level detection device according to claim 1, wherein the energization terminal is formed of a plate-like material in which the contact portion is thicker than the sliding contact portion.
JP2007225941A 2007-08-31 2007-08-31 Liquid level detector Expired - Fee Related JP5019044B2 (en)

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JP2007225941A JP5019044B2 (en) 2007-08-31 2007-08-31 Liquid level detector
PCT/JP2008/064775 WO2009028359A1 (en) 2007-08-31 2008-08-20 Liquid surface detection device

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WO2018074352A1 (en) * 2016-10-21 2018-04-26 日本精機株式会社 Detected unit for movement sensor, and liquid level detecting device provided with same

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