JP2018031698A

JP2018031698A - Liquid level detector

Info

Publication number: JP2018031698A
Application number: JP2016164725A
Authority: JP
Inventors: 明坂牧; Akira Sakamaki
Original assignee: Nippon Seiki Co Ltd
Current assignee: Nippon Seiki Co Ltd
Priority date: 2016-08-25
Filing date: 2016-08-25
Publication date: 2018-03-01

Abstract

PROBLEM TO BE SOLVED: To provide a liquid level detector which can be assembled easily.SOLUTION: The liquid level detector includes: a float which moves according to a liquid surface; a holder 6 for rotating a circuit board 3 according to the movement of an arm 2 connected to the float; and a frame 5 for holding an elastic piece 4 having a connection part 41 in contact with the electrode part of the circuit board 3. The holder 6 has a circuit board holding part for holding the circuit board 3 and an arm holding part 61 for holding the arm 2. The frame 5 and the holder 6 have a shaft supporting part made of a shaft part 52 and a supporting part 63, which allow the holder 6 to be supported rotatably around the frame 5 by fitting together, and holding holes 52b and 63b through which the arm 2 is inserted into the shaft supporting part.SELECTED DRAWING: Figure 3

Description

本発明は、自動車の燃料タンク内の燃料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 the level of fuel in a fuel tank of an automobile.

従来の液面検出装置は、例えば、特許文献１に開示されるものがある。この液面検出装置は、液面に追従して動作するフロートと、このフロートに接続するアームの動きに伴って回路基板を回動させるホルダと、回路基板の電極部と接触する接点部を有する弾性片を保持するフレームと、を備えている。 A conventional liquid level detection device is disclosed in Patent Document 1, for example. This liquid level detection device has a float that operates following the liquid level, a holder that rotates the circuit board in accordance with the movement of the arm connected to the float, and a contact part that contacts the electrode part of the circuit board. And a frame for holding the elastic piece.

特開２０１４−１３９５１８号公報JP 2014-139518 A

しかしながら、従来の液面検出装置は、組み付ける際に、フレームとホルダとの位置、特にアームの各取り付け孔（保持孔）が重なる位置を保ちながら、アームを挿通させ、さらにアームをホルダに係合させる作業が必要であるため、煩雑であった。 However, when assembling the conventional liquid level detection device, the arm is inserted and the arm is engaged with the holder while maintaining the position of the frame and the holder, particularly the position where the mounting holes (holding holes) of the arm overlap. It was cumbersome because the work to be performed was necessary.

そこで本発明は、前記問題点を解消し、組み付け作業が容易な液面検出装置を提供することを目的とする。 Therefore, an object of the present invention is to provide a liquid level detection device that solves the above-described problems and facilitates assembly work.

本発明の液面検出装置は、
液面に追従して移動するフロートと、
このフロートに接続するアームの動きに伴って回路基板を回動させるホルダと、
前記回路基板の電極部と接触する接点部を有する弾性片を保持するフレームと、
を備えた液面検出装置において、
前記ホルダには、前記回路基板を保持する基板保持部と、
前記アームを保持するアーム保持部とが設けられ、
前記フレーム及び前記ホルダには、
嵌合することで前記ホルダが前記フレームに対して回動可能に軸支される軸支部と、
この軸支部に前記アームを挿通する保持孔と、が形成される
ことを特徴とする。 The liquid level detection device of the present invention is
A float that moves following the liquid level;
A holder for rotating the circuit board in accordance with the movement of the arm connected to the float;
A frame for holding an elastic piece having a contact portion in contact with the electrode portion of the circuit board;
In a liquid level detection device comprising:
In the holder, a substrate holding part for holding the circuit board;
An arm holding portion for holding the arm,
In the frame and the holder,
A shaft support part that is rotatably supported with respect to the frame by fitting,
A holding hole through which the arm is inserted is formed in the shaft support portion.

また、前記フレームには、柱状の軸部が設けられ、
前記ホルダには、前記軸部の両端面を挟むようにＵ字形状に設けられる支部が設けられ、
前記軸支部及び前記保持孔は、前記端面に形成される
ことを特徴とする。 Further, the frame is provided with a columnar shaft portion,
The holder is provided with a support portion provided in a U shape so as to sandwich both end faces of the shaft portion,
The shaft support portion and the holding hole are formed in the end surface.

また、前記軸支部は、凸部と凹部とが嵌合してなり、
前記凸部には、（外郭側に面取りされた）傾斜面が形成される
ことを特徴とする。 Further, the shaft support part is formed by fitting a convex part and a concave part,
The convex portion is formed with an inclined surface (beveled on the outer side).

本発明は、組み付け作業が容易な液面検出装置を提供する。 The present invention provides a liquid level detection device that can be easily assembled.

本発明の実施形態の液面検出装置が実装された燃料タンクを示す断面図。Sectional drawing which shows the fuel tank with which the liquid level detection apparatus of embodiment of this invention was mounted. 同実施形態の液面検出装置を分解した要部斜視図。The principal part perspective view which decomposed | disassembled the liquid level detection apparatus of the embodiment. 同実施形態の液面検出装置の断面図。Sectional drawing of the liquid level detection apparatus of the embodiment. 同実施形態の液面検出装置の組み付け後の斜視図。The perspective view after the assembly | attachment of the liquid level detection apparatus of the embodiment. 図４を裏面側からみた液面検出装置の斜視図。The perspective view of the liquid level detection apparatus which looked at FIG. 4 from the back surface side. 同実施形態の液面検出装置のホルダ及びフレームを示す斜視図The perspective view which shows the holder and frame of the liquid level detection apparatus of the embodiment 同実施形態の変形例を示す液面検出装置の断面図。Sectional drawing of the liquid level detection apparatus which shows the modification of the embodiment.

以下、本発明の実施形態として、車両の燃料タンク内実装される液面検出装置に適用したものを例に挙げて、添付図面を用いて説明する。 Hereinafter, an embodiment applied to a liquid level detection device mounted in a fuel tank of a vehicle will be described as an example with reference to the accompanying drawings.

本発明の実施形態の液面検出装置Ａは、図１，２に示すように、燃料Ｂの消費や供給に応じて液面Ｂ１が変化する燃料タンクＣ内に実装され、フロート１と、アーム２と、回路基板３と、弾性片４と、フレーム５、ホルダ６と、配線７と、を備えている。この場合、液面検出装置Ａは、図示しない燃料ポンプの取り付け箇所において、該ポンプとともに実装される。 As shown in FIGS. 1 and 2, the liquid level detection device A according to the embodiment of the present invention is mounted in a fuel tank C in which the liquid level B1 changes according to consumption and supply of the fuel B. 2, circuit board 3, elastic piece 4, frame 5, holder 6, and wiring 7. In this case, the liquid level detection device A is mounted together with the pump at a fuel pump mounting location (not shown).

フロート１は、例えば、フェノール発泡体等の燃料Ｂよりも比重の小さい部材が適用されて、燃料Ｂの液面Ｂ１に浮かぶ。例えば、走行にともなう燃料消費や、給油など燃料量の変化にともなって、液面Ｂ１が変化すると、これに応じてフロート１が燃料タンクＣ内を上下に位置変化するようになっている。フロート１は、アーム２を介してホルダ６に保持されている。 For example, a member having a specific gravity smaller than that of the fuel B such as a phenol foam is applied to the float 1 and floats on the liquid surface B1 of the fuel B. For example, when the liquid level B1 changes due to changes in the amount of fuel, such as fuel consumption or refueling, the float 1 moves up and down in the fuel tank C accordingly. The float 1 is held by a holder 6 via an arm 2.

アーム２は、例えば、ステンレス鋼等の金属からなる丸棒状の芯材をフロート１やホルダ６、燃料タンクＣの形状にあわせて折り曲げ加工されている。アーム２の一端は、フロート１の孔１１に挿通され、他端側は、図３乃至図５に示すようにホルダ６のアーム保持部６１に挿入される第１の挿入部２１と、更に他端側に第１の挿入部２１に対して折り曲げられて後述する軸支部に挿入される第２の挿入部２２とを有する。 The arm 2 is formed by bending a round bar-shaped core made of a metal such as stainless steel according to the shapes of the float 1, the holder 6, and the fuel tank C, for example. One end of the arm 2 is inserted through the hole 11 of the float 1, and the other end is inserted into the first insertion portion 21 inserted into the arm holding portion 61 of the holder 6 as shown in FIGS. It has the 2nd insertion part 22 bent by the 1st insertion part 21 at the end side, and inserted in the axial support part mentioned later.

回路基板３は、セラミックス等の絶縁基板に電極部３１を構成する導電材料や抵抗材料が印刷、焼成により形成されて適用できる。また、回路基板３は、ホルダ６の基板保持部６２に収納保持される。電極部３１は、弾性片４の対向面に形成されており、ホルダ６の回動に応じた弾性片４との接触位置の軌跡にあわせて円弧状に形成されている。また、電極部３１は、一対の弾性片４間の抵抗値が、円弧状の接触位置、即ちフレーム５に対するホルダ６の相対角度に応じて異なるように形成されている。 The circuit board 3 can be applied by forming a conductive material or a resistance material constituting the electrode portion 31 on an insulating substrate such as ceramics by printing and baking. The circuit board 3 is stored and held in the board holding portion 62 of the holder 6. The electrode portion 31 is formed on the opposing surface of the elastic piece 4 and is formed in an arc shape according to the locus of the contact position with the elastic piece 4 according to the rotation of the holder 6. The electrode portion 31 is formed such that the resistance value between the pair of elastic pieces 4 varies depending on the arcuate contact position, that is, the relative angle of the holder 6 with respect to the frame 5.

弾性片４は、回路基板３の電極部３１に対向する位置に、導電性の金属によって一対に形成され、各先端部分が回路基板３の電極部３１に接触するとともに、電極部３１上を摺動する接点部４１を設けている。また、弾性片４は、フレーム５に固定保持されており、電極部３１に接点部４１を押し付けるように弾性を有する腕部４２を設けている。また、弾性片４の接点部４１は、腕部４２や配線７と接続するための加締め接続部４３を介して各配線７と電気的に接続している。 The elastic pieces 4 are formed of a pair of conductive metals at positions facing the electrode portions 31 of the circuit board 3, and each tip portion contacts the electrode portions 31 of the circuit board 3 and slides on the electrode portions 31. A moving contact portion 41 is provided. The elastic piece 4 is fixedly held on the frame 5, and an elastic arm portion 42 is provided so as to press the contact portion 41 against the electrode portion 31. Further, the contact portion 41 of the elastic piece 4 is electrically connected to each wiring 7 through a caulking connection portion 43 for connecting to the arm portion 42 and the wiring 7.

フレーム５は、ポリアセタール等の合成樹脂を適用でき、図示のように成形される。この場合、弾性片４の一部をインサート成形しており、フック５１と、軸部５２と、配線接続部５３とが設けられる。 A synthetic resin such as polyacetal can be applied to the frame 5 and it is molded as shown. In this case, a part of the elastic piece 4 is insert-molded, and a hook 51, a shaft portion 52, and a wiring connection portion 53 are provided.

フック５１は、液面検出装置Ａを燃料タンクＣ内の所定位置に取り付けるための係合手段で、この場合、三か所設けられる。 The hooks 51 are engaging means for attaching the liquid level detection device A to a predetermined position in the fuel tank C. In this case, three hooks are provided.

軸部５２は、ホルダ６を回転可能に支持する軸支部であり、後述するホルダ６の支部に挟まれる柱状に形成され、図３，６に示すように、凸部５２ａと、保持孔５２ｂと、傾斜面５２ｃとが形成される。 The shaft portion 52 is a shaft support portion that rotatably supports the holder 6, and is formed in a column shape sandwiched between support portions of the holder 6 described later. As shown in FIGS. 3 and 6, the protrusion portion 52 a and the holding hole 52 b The inclined surface 52c is formed.

凸部５２ａは、前記支部に挟まれる端面のうち一方側に設けられ、回転中心の同心円上に外郭を有する形状であり、さらに後述するホルダ６の凹部に嵌まる形状である。 The convex portion 52a is provided on one side of the end surface sandwiched between the supporting portions, has a shape having an outer shape on a concentric circle at the center of rotation, and further fits into a concave portion of the holder 6 described later.

保持孔５２ｂは、前記回転中心で、かつ前記支部に挟まれる両端面を貫通し、アーム２の第２の挿入部２２を挿通するための孔である。保持孔５２ｂの内径は、この端面の面方向（ラジアル方向）において、凸部５２ａの外径よりも小さく、かつアーム２の第２の挿入部２２をガタツキなく軸支可能な大きさが好適である。 The holding hole 52 b is a hole for passing through the second insertion portion 22 of the arm 2 through the both ends of the rotation center and between the support portions. The inner diameter of the holding hole 52b is preferably smaller than the outer diameter of the convex portion 52a in the surface direction (radial direction) of the end surface, and is large enough to support the second insertion portion 22 of the arm 2 without rattling. is there.

傾斜面５２ｃは、図６に示すように、凸部５２ａにおいて、ホルダ６をフレーム５に組み付ける際の、前記支部との対向部分（外郭側）を面取りして傾斜状に設けられ、前記支部に接触し、挟み込みを押し広げるように変形させるためのガイド面となる。これにより、ホルダ６をフレーム５にスライドさせるだけで、組み付けることができ作業が容易になる。 As shown in FIG. 6, the inclined surface 52 c is provided in an inclined shape by chamfering a portion (outer side) facing the support portion when the holder 6 is assembled to the frame 5 in the convex portion 52 a. It becomes a guide surface for contacting and deforming so as to push the sandwich. As a result, the holder 6 can be assembled simply by sliding the holder 6 on the frame 5, and the work becomes easy.

配線接続部５３は、弾性片４に連続して形成される加締め接続部４３を囲う形状で、図５に示すように、配線７が通るスリット５３ａが形成される。この配線接続部５３によって、液面検出装置Ａの輸送時や組み付け時において、配線７の導線部分に接続される加締め接続部４３が変形することを防止できる。 The wiring connection portion 53 has a shape surrounding a caulking connection portion 43 formed continuously with the elastic piece 4, and a slit 53a through which the wiring 7 passes is formed as shown in FIG. The wiring connection portion 53 can prevent the caulking connection portion 43 connected to the conductor portion of the wiring 7 from being deformed when the liquid level detection device A is transported or assembled.

ホルダ６は、例えば、ポリアセタール等の合成樹脂を用いて、図示のように成形され、アーム保持部６１と、基板保持部６２と、支部６３とを備えて、回路基板３やアーム２を保持するとともに、フレーム５に対して回動可能に軸支される。 The holder 6 is formed as shown in the figure using, for example, a synthetic resin such as polyacetal, and includes an arm holding part 61, a board holding part 62, and a support part 63 to hold the circuit board 3 and the arm 2. At the same time, it is pivotally supported with respect to the frame 5.

アーム保持部６１は、図３，５に示すように、ホルダ６の外側、この場合、基板保持部６２の裏面側に設けられ、アーム２の第１の挿入部２１を保持するように覆う覆い部６１ａと、この覆い部６１ａにアーム２が挿入される際の隙間からアーム２が抜け出ないようにする弾性変形可能な規制部６１ｂとが形成される。 As shown in FIGS. 3 and 5, the arm holding portion 61 is provided on the outer side of the holder 6, in this case, on the back side of the substrate holding portion 62, and covers the first insertion portion 21 of the arm 2 so as to hold it. A portion 61a and an elastically deformable restricting portion 61b that prevents the arm 2 from coming out of a gap when the arm 2 is inserted into the cover portion 61a are formed.

基板保持部６２は、フレーム５との対向面に凹形状に形成されて、回路基板３を係合保持する、係合部６２ａを備えており、回路基板３を所定箇所に位置決め保持する。 The board holding part 62 is formed in a concave shape on the surface facing the frame 5, and includes an engaging part 62 a that engages and holds the circuit board 3, and positions and holds the circuit board 3 at a predetermined position.

支部６３は、フレーム５に対してホルダ６を回転可能に軸支するための軸支部であり、Ｕ字状（コの字状）に形成される。支部６３は、フレーム５の軸部５２の両端部（両端面）を挟む形状である。この支部６３による軸部５２を挟み込む部分において、凹部６３ａと、保持孔６３ｂと、溝部６３ｃとが形成される。 The support portion 63 is a shaft support portion for rotatably supporting the holder 6 with respect to the frame 5 and is formed in a U shape (a U shape). The support portion 63 has a shape that sandwiches both end portions (both end surfaces) of the shaft portion 52 of the frame 5. In a portion where the shaft portion 52 is sandwiched by the support portion 63, a concave portion 63a, a holding hole 63b, and a groove portion 63c are formed.

凹部６３ａは、軸部５２の両端のうち一方側、この場合、図３に示すように、基板保持部６２と反対側で、該端部に対向する箇所（内側）に凹形状に形成され、軸部５２の凸部５２ａが嵌まるように設けられる。 The concave portion 63a is formed in a concave shape at one side of both ends of the shaft portion 52, in this case, on the opposite side to the substrate holding portion 62, as shown in FIG. It is provided so that the convex part 52a of the axial part 52 fits.

保持孔６３ｂは、アーム２の第２の挿入部２２を挿通するための孔で、フレーム５に対するホルダ６の回転中心となり、アーム２を固定保持できる内径を有する。保持孔６３ｂは、アーム２がホルダ６から抜けることを防止するため、回転のラジアル方向の位置を規制し、アーム保持部６１によってスラスト方向の位置が規制され、ホルダ６に対してアーム２を強固に保持できる。 The holding hole 63b is a hole through which the second insertion portion 22 of the arm 2 is inserted. The holding hole 63b serves as a rotation center of the holder 6 with respect to the frame 5 and has an inner diameter that can hold the arm 2 fixedly. The holding hole 63 b restricts the position in the radial direction of rotation in order to prevent the arm 2 from coming out of the holder 6, and the position in the thrust direction is restricted by the arm holding portion 61, so that the arm 2 is firmly attached to the holder 6. Can be retained.

なお、保持孔５２ｂ，６３ｂにアーム２の第２の挿入部２２を組み付ける際には、凹部６３ａが凸部５２ａに嵌まっていることで、ホルダ６がフレーム５に軸支状態となり、位置ずれが生じにくいだけでなく、保持孔５２ｂ，６３ｂ同士が重なっているため、組み付けが容易となる。また、組み付け後においても、ホルダ６が、アーム２だけでなくフレーム５に対しても軸支状態となるため、車両の走行に伴って液面Ｂ１及びフロート１が揺れ動く状況下であっても、より強固な軸支構造となる。 When assembling the second insertion portion 22 of the arm 2 into the holding holes 52b and 63b, the recess 63a is fitted into the projection 52a, so that the holder 6 is pivotally supported by the frame 5 and is displaced. Since the holding holes 52b and 63b overlap each other, the assembly is facilitated. Further, even after assembly, the holder 6 is in a state of being pivotally supported not only for the arm 2 but also for the frame 5, so even if the liquid level B1 and the float 1 are shaken as the vehicle travels, The shaft support structure is stronger.

溝部６３ｃは、凹部６３ａの形成箇所と反対側（外側）に溝形状に設けられ、Ｕ字形状の支部６３が樹脂成形時のヒケや、経年変化によって、広がり方向に変形し、軸支状態でなくなることを防止するだけでなく、ホルダ６をフレーム５にスライドして嵌め込む際に、傾斜面５２ｃによって押し広げられる際の弾性変形量を増加させ、より組み付け易くなる作用が期待できる。 The groove part 63c is provided in a groove shape on the opposite side (outside) from the formation part of the concave part 63a, and the U-shaped support part 63 is deformed in the spreading direction due to sink marks or aging during resin molding, and in a shaft support state. In addition to preventing the loss, it is possible to increase the amount of elastic deformation when the holder 6 is slid and fitted into the frame 5 so as to be spread by the inclined surface 52c, so that an effect of facilitating the assembly can be expected.

配線７は、グランド線と、出力信号線の２線からなり、銅などの金属の芯線を耐油性の架橋ポリエチレン部材で被覆したものであり、加締め接続部４３により固定される。配線７は、図１に示すように燃料タンクＣの外側に導かれ、車両のＥＣＵ（電子制御ユニット）に接続され、例えば、燃料タンクＣの形状を考慮した液面レベルに基づいて、燃料残量を測定し、車両の燃料残量計の表示、または燃料消費率や航続可能距離の算出、表示に用いられる。 The wiring 7 is composed of two wires, a ground wire and an output signal wire, in which a metal core wire such as copper is covered with an oil-resistant crosslinked polyethylene member, and is fixed by a caulking connection portion 43. The wiring 7 is led to the outside of the fuel tank C as shown in FIG. 1 and is connected to the ECU (electronic control unit) of the vehicle. For example, the wiring 7 is based on the liquid level considering the shape of the fuel tank C. The amount is measured and used to display the fuel level indicator of the vehicle, or to calculate and display the fuel consumption rate and cruising range.

斯かる液面検出装置Ａは、液面Ｂ１に追従して移動するフロート１と、このフロート１に接続するアーム２の動きに伴って回路基板３を回動させるホルダ６と、回路基板３の電極部３１と接触する接点部４１を有する弾性片４を保持するフレーム５と、を備え、ホルダ６には、回路基板３を保持する基板保持部６２と、アーム２を保持するアーム保持部６１とが設けられ、フレーム５及びホルダ６には、嵌合することでホルダ６がフレーム５に対して回動可能に軸支される軸部５２及び支部６３からなる軸支部と、この軸支部にアーム２を挿通する保持孔５２ｂ，６３ｂと、が形成される。 Such a liquid level detection device A includes a float 1 that moves following the liquid level B 1, a holder 6 that rotates the circuit board 3 in accordance with the movement of the arm 2 connected to the float 1, A frame 5 that holds an elastic piece 4 having a contact portion 41 that contacts the electrode portion 31. The holder 6 includes a substrate holding portion 62 that holds the circuit board 3, and an arm holding portion 61 that holds the arm 2. The frame 5 and the holder 6 are fitted to the frame 5 and the holder 6 so that the holder 6 is pivotally supported with respect to the frame 5 so that the holder 6 is pivotally supported. Holding holes 52b and 63b through which the arm 2 is inserted are formed.

従って、アーム２をホルダ６やフレーム５に組み付ける際に、ホルダ６とフレーム５とが保持関係にあるため、組み付け作業が容易となる。 Therefore, when the arm 2 is assembled to the holder 6 or the frame 5, the holder 6 and the frame 5 are in a holding relationship, so that the assembling work is facilitated.

また、フレーム５には、柱状の軸部５２が設けられ、ホルダ６には、軸部５２の両端面を挟むようにＵ字形状に設けられる支部６３が設けられ、前記軸支部及び保持孔５２ｂ，６３ｂは、前記端面に形成されることによって、ホルダ６とフレーム５との仮止めするための機構や部材が必要なく、また、組み付け後においても、ホルダ６とフレーム５とが強固に軸支できる構造となる。 Further, the frame 5 is provided with a columnar shaft portion 52, and the holder 6 is provided with a support portion 63 provided in a U shape so as to sandwich both end faces of the shaft portion 52, and the shaft support portion and the holding hole 52b. , 63b are formed on the end face, so that a mechanism or member for temporarily fixing the holder 6 and the frame 5 is not required, and the holder 6 and the frame 5 are firmly supported even after assembly. It becomes a possible structure.

また、前記軸支部は、凸部５２ａと凹部６３ａとが嵌合してなり、凸部５２ａには、傾斜面５２ｃが形成されることによって、ホルダ６とフレーム５との組み付け性も容易になる。 In addition, the shaft support portion is formed by fitting the convex portion 52a and the concave portion 63a, and the convex portion 52a is formed with the inclined surface 52c, so that the holder 6 and the frame 5 can be easily assembled. .

なお、本発明の液面検出装置を上述した実施形態の構成にて例に挙げて説明したが、本発明はこれに限定されるものではなく、他の構成においても、本発明の要旨を逸脱しない範囲において種々の改良、並びに表示の変更が可能なことは勿論である。例えば、上述実施形態にあっては、凸部５２ａと凹部６３ａとが一箇所で嵌合してホルダ６とフレーム５とが軸支される例を示したが、両端面側に一対に設けることもでき、また、凹凸関係を逆にすることもでき、上述した実施形態と同様の効果を得ることができる。 Although the liquid level detection device of the present invention has been described as an example in the configuration of the above-described embodiment, the present invention is not limited to this, and other configurations deviate from the gist of the present invention. It goes without saying that various improvements and display changes can be made without departing from the scope. For example, in the above-described embodiment, the example in which the convex portion 52a and the concave portion 63a are fitted at one place and the holder 6 and the frame 5 are pivotally supported is shown. In addition, the concavo-convex relationship can be reversed, and the same effect as the above-described embodiment can be obtained.

また、軸支部において、ホルダ６に形成されるＵ字形状の支部６３と、フレーム５の軸部５２とを例に挙げて説明したが、ホルダに軸部５２と同様な形状を設け、フレームに支部６３と同様な形状を設けることで、ホルダとフレームとを軸支する構造であってもよく、上述した実施形態と同様の効果を得ることができる。 Further, in the shaft support portion, the U-shaped support portion 63 formed on the holder 6 and the shaft portion 52 of the frame 5 have been described as examples. However, the holder is provided with the same shape as the shaft portion 52, and the frame is provided with the same shape. By providing a shape similar to that of the support portion 63, a structure in which the holder and the frame are pivotally supported may be used, and the same effect as in the above-described embodiment can be obtained.

また、上述した実施形態にあっては、図３に示すように、凹部６３ａによって、凸部５２ａが嵌まるスペースとし、凹部６３ａに隣接する保持孔６３ｂによって、アーム２を直接軸支するものを示したが、例えば、図７に示すようなホルダ６０の形状であってもよい。なお、図７において、上述した実施形態と同様の構成について同じ符号を付して詳細な説明を省く。このホルダ６０は、上述実施形態で示した凹部６３ａに相当する形状を適用せず、この凹部６３ａの内径に相当（凸部５２ａの外径に対応）する内径の保持孔６３ｂ１によって、凸部５２ａが嵌まるスペースとするとともに、凸部５２ａを介してアーム２を軸支する構造である。これによって、ホルダ６０の樹脂成形が容易になるだけでなく、組み付け作業時に、保持孔６３ｂ１を介して、凸部５２ａの嵌合状態を外側から視認することも可能となる。 Further, in the above-described embodiment, as shown in FIG. 3, a space in which the convex portion 52a is fitted by the concave portion 63a, and the arm 2 is directly supported by the holding hole 63b adjacent to the concave portion 63a. Although shown, the shape of the holder 60 as shown in FIG. 7 may be sufficient, for example. In FIG. 7, the same components as those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The holder 60 does not apply the shape corresponding to the concave portion 63a shown in the above embodiment, and the convex portion 52a is formed by the holding hole 63b1 having an inner diameter corresponding to the inner diameter of the concave portion 63a (corresponding to the outer diameter of the convex portion 52a). Is a space in which the arm 2 is fitted, and the arm 2 is pivotally supported via the convex portion 52a. Thereby, not only the resin molding of the holder 60 is facilitated, but also the fitting state of the convex portion 52a can be visually recognized from the outside through the holding hole 63b1 during the assembling work.

本発明は、容器内の液体の液面を検出する液面検出装置に利用可能であり、例えば、車両等の移動体における燃料タンク内の液面や、各種オイルの液面を検出する装置として好適である。 INDUSTRIAL APPLICABILITY The present invention can be used for a liquid level detection device that detects the liquid level of a liquid in a container. For example, as a device that detects a liquid level in a fuel tank in a moving body such as a vehicle or a liquid level of various oils. Is preferred.

１フロート１
１１孔
２アーム
２１第１の挿入部
２２第２の挿入部
３回路基板
３１電極部
４弾性片
４１接点部
４２腕部
４３加締め接続部
５フレーム
５１フック
５２軸部
５２ａ凸部
５２ｂ保持孔
５２ｃ傾斜面
５３配線接続部
５３ａスリット
６ホルダ
６１アーム保持部
６１ａ覆い部
６１ｂ規制部
６２基板保持部
６２ａ係合部
６３支部
６３ａ凹部
６３ｂ保持孔
６３ｃ溝部
７配線
Ａ液面検出装置
Ｂ燃料
Ｂ１液面
Ｃ燃料タンク 1 Float 1
11 hole 2 arm 21 first insertion part 22 second insertion part 3 circuit board 31 electrode part 4 elastic piece 41 contact part 42 arm part 43 crimping connection part 5 frame 51 hook 52 shaft part 52a convex part 52b holding hole 52c Inclined surface 53 Wiring connection portion 53a Slit 6 Holder 61 Arm holding portion 61a Covering portion 61b Restricting portion 62 Substrate holding portion 62a Engaging portion 63 Supporting portion 63a Recess 63b Holding hole 63c Groove portion 7 Wiring A Liquid level detection device B Fuel B1 Liquid level C Fuel tank

Claims

A float that moves following the liquid level;
A holder for rotating the circuit board in accordance with the movement of the arm connected to the float;
In a liquid level detection device comprising: a frame that holds an elastic piece having a contact portion that contacts the electrode portion of the circuit board;
In the holder, a substrate holding part for holding the circuit board;
An arm holding portion for holding the arm,
In the frame and the holder,
A shaft support part that is rotatably supported with respect to the frame by fitting,
A liquid level detecting device, wherein a holding hole through which the arm is inserted is formed in the shaft support portion.

The frame is provided with a columnar shaft portion,
The holder is provided with a support portion provided in a U shape so as to sandwich both end faces of the shaft portion,
The liquid level detection device according to claim 1, wherein the shaft support portion and the holding hole are formed in the end surface.

The shaft support part is formed by fitting a convex part and a concave part,
The liquid level detection device according to claim 1, wherein an inclined surface is formed on the convex portion.