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JP6554871B2 - Liquid level detector - Google Patents
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JP6554871B2 - Liquid level detector - Google Patents

Liquid level detector Download PDF

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JP6554871B2
JP6554871B2 JP2015071590A JP2015071590A JP6554871B2 JP 6554871 B2 JP6554871 B2 JP 6554871B2 JP 2015071590 A JP2015071590 A JP 2015071590A JP 2015071590 A JP2015071590 A JP 2015071590A JP 6554871 B2 JP6554871 B2 JP 6554871B2
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liquid level
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straight line
bearing
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JP2016191618A (en
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明 坂牧
明 坂牧
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Nippon Seiki Co Ltd
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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、液面に追従して動作するフロートの動きに伴って回路基板を回動させるホルダ2と、回路基板4の電極部と接触する接点部を備えた弾性片を有する端子と、端子の一部を内蔵するフレーム1と、を備えたものである(例えば、特許文献1を参照)。   The conventional liquid level detection device has a holder 2 that rotates the circuit board in accordance with the movement of the float that operates following the liquid level, and an elastic piece that includes a contact part that contacts the electrode part of the circuit board 4. A terminal and a frame 1 containing a part of the terminal are provided (for example, see Patent Document 1).

特開2014−139518号公報JP 2014-139518 A

しかしながら、このような液面検出装置は、ホルダ2が、フレーム1に対して回動可能に支持されると共に、フレーム1を上下に挟む保持部を備え、その保持部とフレーム1とをフロートアーム3が貫通していたが、保持部2Bに形成された変形防止用の補強部が、ホルダ2の外側に向かって突出している場合、
液面検出装置を燃料タンクへの取付の際に、前記補強部を設けたことにより、前記燃料タンクの開口に前記液面検出装置が入らなくなるため、小型化が望まれているという問題があった。
However, in such a liquid level detection device, the holder 2 is rotatably supported with respect to the frame 1 and includes a holding portion that sandwiches the frame 1 up and down, and the holding portion and the frame 1 are connected to the float arm. 3 has penetrated, but when the deformation preventing reinforcement formed on the holding portion 2B protrudes toward the outside of the holder 2,
When the liquid level detecting device is attached to the fuel tank, the reinforcing portion is provided, so that the liquid level detecting device does not enter the opening of the fuel tank. It was.

そこで、本発明は、前述の問題点に着目し、補強部を備えていても燃料タンクの開口に入れることが可能な小型の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 small liquid level detection device that can be inserted into an opening of a fuel tank even if a reinforcing portion is provided.

本発明は、前記課題を解決するために、液面に追従して動作するフロートを有するフロートアームを保持するホルダと、前記ホルダを回動可能に支持するフレームと、を備えた液面検出装置において、前記フレームは、その外周部分に前記フロートアームの軸部を回動可能に保持する軸受部を備え、前記ホルダは、主要部とこの主要部と対向する対向片及び前記主要部と前記対向片を連結する連結部とを有し、前記主要部と前記対向片との間に前記軸受部を配置する保持部を備え、前記フロートアームが、前記主要部、前記軸受部、及び前記対向片とを貫通し、前記ホルダが、前記フレームに回動可能に保持され、前記連結部は、前記軸受部と面していない外周面の端部又は端部近傍に補強部を有し、前記補強部は、前記ホルダの回動中心を通り前記ホルダの前記連結部と対向する面とを最短で結ぶ直線と、前記外周面と前記直線との交点を通り前記最短で結ぶ直線に対して直交する線よりも前記ホルダの回動中心の前記軸部側かつ前記直線に対し線対象に形成されるものである。
In order to solve the above-mentioned problems, the present invention provides a liquid level detection device comprising a holder that holds a float arm having a float that operates following the liquid level, and a frame that rotatably supports the holder. The frame includes a bearing portion rotatably holding the shaft portion of the float arm on an outer peripheral portion thereof, and the holder includes a main portion, a facing piece facing the main portion, and the main portion facing the main portion. A holding portion for disposing the bearing portion between the main portion and the facing piece, and the float arm includes the main portion, the bearing portion, and the facing piece. The holder is rotatably held by the frame, and the connecting portion has a reinforcing portion at or near the end of the outer peripheral surface not facing the bearing portion, and the reinforcing The center of rotation of the holder A rotation center of the holder than a straight line connecting the surface of the holder facing the connecting portion in the shortest distance and a line passing through the intersection of the outer peripheral surface and the straight line and orthogonal to the straight line connecting the shortest distance. It is formed in a line object with respect to the shaft side and the straight line .

以上の構成によって、本発明は、所期の目的を達成することができ、補強部を備えていても燃料タンクの開口に入れることが可能な小型の液面検出装置を提供することができる。   With the above configuration, the present invention can achieve the intended purpose, and can provide a small liquid level detection device that can be inserted into the opening of the fuel tank even if it has a reinforcing portion.

本発明における実施形態の液面検出装置の正面図。The front view of the liquid level detection apparatus of embodiment in this invention. 図1中A−A断面図。AA sectional drawing in FIG. 同実施形態のホルダの下面側から見た斜視図。The perspective view seen from the lower surface side of the holder of the embodiment. 同実施形態のホルダの上面図。The top view of the holder of the embodiment. 同実施形態のフレームの斜視図。The perspective view of the flame | frame of the embodiment. 図2中C−C断面図。CC sectional drawing in FIG. 同発明における他の実施形態の断面図。Sectional drawing of other embodiment in the same invention.

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

本発明の実施形態の液面検出装置Fは、図1,3、及び5に示すように、フレーム1と、ホルダ2と、フロートアーム3と、回路基板4と、端子5と、から主に構成されている。なお、端子5には、配線コード6が固定されている。また、液面検出装置Fは、燃料ポンプや取付ステーなどの合成樹脂等からなる取付部(図示せず)に固定されている。   As shown in FIGS. 1, 3, and 5, the liquid level detection device F according to the embodiment of the present invention mainly includes a frame 1, a holder 2, a float arm 3, a circuit board 4, and a terminal 5. It is configured. A wiring cord 6 is fixed to the terminal 5. Further, the liquid level detection device F is fixed to a mounting portion (not shown) made of a synthetic resin such as a fuel pump or a mounting stay.

フレーム1は、合成樹脂、例えば、ポリアセタールからなり、ベース部11と、ストッパ部(図示せず)と、フック部13と、軸受部14とを一体に備えている。また、フレーム1は、端子5の一部をインサート成形によって内蔵している。   The frame 1 is made of a synthetic resin, for example, polyacetal, and integrally includes a base portion 11, a stopper portion (not shown), a hook portion 13, and a bearing portion 14. Further, the frame 1 incorporates a part of the terminal 5 by insert molding.

フック部13は、係止部13Aを複数備えており、この係止部13Aは、前記取付部に設けられる貫通孔などからなる係合部に係合し、フレーム1が前記取付部に固定される。   The hook portion 13 includes a plurality of locking portions 13A. The locking portions 13A engage with an engaging portion including a through hole provided in the mounting portion, and the frame 1 is fixed to the mounting portion. The

軸受部14は、フレーム1の外周部分に設けられ、ホルダ2を回動可能に支持するものであり、フロートアーム3の軸部31が挿通する貫通孔14Aを備えている。   The bearing portion 14 is provided on the outer peripheral portion of the frame 1 and supports the holder 2 so as to be rotatable, and includes a through hole 14 </ b> A through which the shaft portion 31 of the float arm 3 is inserted.

図3、図4に示すように、ホルダ2は、液面に追従して動作するフロート(図示せず)の動きに伴って回路基板4を回動させるものである。ホルダ2は、合成樹脂、例えば、ポリアセタールからなり、回路基板4を配置する板形状の回路基板収納部2Aと、フレーム1の軸受部14を間に保持するコの字状の保持部2Bと、フロートアーム3を保持する第1、第2係止部2C1、2C2と、フレーム1のストッパ部(図示せず)に当接する当接面を有する垂れ下がり部2Eを備えている。   As shown in FIGS. 3 and 4, the holder 2 rotates the circuit board 4 in accordance with the movement of a float (not shown) that operates following the liquid level. The holder 2 is made of a synthetic resin, for example, polyacetal, and has a plate-shaped circuit board housing part 2A for arranging the circuit board 4 and a U-shaped holding part 2B for holding the bearing part 14 of the frame 1 therebetween. First and second engaging portions 2C1 and 2C2 that hold the float arm 3, and a hanging portion 2E having an abutting surface that abuts against a stopper portion (not shown) of the frame 1 are provided.

また、保持部2Bは、軸受部14を間に保持する回路基板収納部2Aを兼ねる主要部2A、対向片2B2、及び主要部2Aと対向片2B2を連結する連結部2B3と、からなり、連結部2B3の軸受部14と面していない外周面2B3aの端部に補強部2B4を有している。補強部2B4は、保持部2B、特に、ホルダ2の回転軸方向に対して垂直方向の連結部2B3の断面積を増やし、連結部2B3の剛性を補強するものである。
The holding portion 2B includes a main portion 2A that also serves as a circuit board housing portion 2A that holds the bearing portion 14 therebetween, an opposing piece 2B2 , and a connecting portion 2B3 that connects the main portion 2A and the opposing piece 2B2. The reinforcing portion 2B4 is provided at the end of the outer peripheral surface 2B3a that does not face the bearing portion 14 of the portion 2B3. The reinforcing portion 2B4 increases the cross-sectional area of the holding portion 2B, particularly the connecting portion 2B3 perpendicular to the rotation axis direction of the holder 2, and reinforces the rigidity of the connecting portion 2B3.

保持部2Bは、主要部2Aと対向片2B2との間に、前記軸受部を配置している。フロートアーム3の軸部31が、主要部2Aと、軸受部14と、対向片2B2とを貫通し、ホルダ2がフレーム1に回動可能に保持される。フレーム1とホルダ2との組み付けは、主要部2Aに設けた貫通孔と、軸受部14の貫通孔14Aとを合わせ、フロートアーム3の軸部31を貫通させる。軸部31を貫通させた後は、フロートアーム3を第1、第2係止部2C1、2C2に組み付けて保持させる。
In the holding portion 2B, the bearing portion is disposed between the main portion 2A and the facing piece 2B2 . The shaft portion 31 of the float arm 3 passes through the main portion 2A, the bearing portion 14, and the facing piece 2B2, and the holder 2 is rotatably held by the frame 1. Assembling of the frame 1 and the holder 2 causes the through hole provided in the main part 2A and the through hole 14A of the bearing part 14 to be combined, and the shaft part 31 of the float arm 3 is passed through. After penetrating the shaft portion 31, the float arm 3 is assembled and held in the first and second locking portions 2C1 and 2C2.

補強部2B4は、図4に示すように、ホルダ2の回動中心Cを通りホルダ2の連結部2B3と対向する面Hとを最短で結ぶ直線Gと、外周面2B3aと直線Gとの交点Dを通り、最短で結ぶ線Gに対して直交する仮想線Tよりもホルダ2の回動中心C側に形成される。また、図2、図5に示すように、補強部2B4は、軸受部14と面していない側(外側)の端部(回転方向の左右端部)から突出した突起が一体成形されたものである。
As shown in FIG. 4, the reinforcing portion 2B4 is an intersection of a straight line G that passes through the rotation center C of the holder 2 and connects the surface H that faces the connecting portion 2B3 of the holder 2 in the shortest direction, and the outer peripheral surface 2B3a and the straight line G. It is formed closer to the center of rotation C of the holder 2 than a virtual line T passing through D and orthogonal to the line G connecting at the shortest. In addition, as shown in FIGS. 2 and 5, the reinforcing portion 2B4 is integrally formed with protrusions protruding from the end (outside) end portion (left and right end portions in the rotation direction) not facing the bearing portion 14. It is.

また、補強部2B4は、仮想線Tよりもホルダ2の回動中心C側に形成されていることで、補強部2B4を備えていながら、液面検出装置Fを小型化することが可能となる。
Further, since the reinforcing portion 2B4 is formed closer to the rotation center C of the holder 2 than the virtual line T, it is possible to reduce the size of the liquid level detection device F while including the reinforcing portion 2B4. .

フロートアーム3は、硬鋼線からなり、燃料タンク形状に合わせたりするために所定形状に折り曲げ形成されている。フロートアーム3には、図示しないフロートが固定されている。このフロートは、NBR/フェノール発泡体からなり、燃料などの液面に浮き、液面に追従して動作するものである。   The float arm 3 is made of hard steel wire, and is bent into a predetermined shape so as to match the shape of the fuel tank. A float (not shown) is fixed to the float arm 3. This float is made of NBR / phenol foam, and floats on the liquid level of fuel or the like, and operates following the liquid level.

回路基板4は、図示しない電極部を備えており、この電極部を構成する導体材料や抵抗材料が、絶縁基板上に印刷、焼成により形成されている。この回路基板4は、ホルダ2に取り付けられて液面に追従して動作するフロートに連動するものである。   The circuit board 4 includes an electrode portion (not shown), and a conductor material and a resistance material constituting the electrode portion are formed on the insulating substrate by printing and baking. The circuit board 4 is attached to the holder 2 and interlocks with a float that operates following the liquid level.

端子5は、例えば、洋白材からなるものであり、2つ設けられている。各端子5は、回路基板4の電極部に接触する接点部5Aを備えた弾性片5Dと、配線コード6を保持する加締部5Bと、弾性片5Dと加締部5Bとを接続する中継部5Cとを一体に備えたものである。   The terminal 5 is made of, for example, a white material, and two terminals 5 are provided. Each terminal 5 has an elastic piece 5D provided with a contact part 5A that contacts the electrode part of the circuit board 4, a crimping part 5B that holds the wiring cord 6, and a relay that connects the elastic piece 5D and the crimping part 5B. The unit 5C is integrally provided.

配線コード6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6Aを耐油性の架橋ポリエチレンの被覆部6Bで被覆したものであり、端子5に加締めにより固定される。   The wiring cord 6 is composed of two wires, a ground wire and an output signal wire, and a metal core wire 6A such as copper is covered with an oil-resistant cross-linked polyethylene covering portion 6B, and is fixed to the terminal 5 by caulking. The

このように、本発明は、液面に追従して動作するフロートを有するフロートアーム3を保持するホルダ2と、ホルダ2を回動可能に支持するフレームと、を備えた液面検出装置Fにおいて、フレーム1は、その外周部分にフロートアーム3の軸部31を回動可能に保持する軸受部14を備え、ホルダ2は、主要部2A、対向片2B2、及び主要部2Aと対向片2B2を連結する連結部2B3と、を有し、主要部2Aと対向片2B2との間に軸受部14を配置する保持部2Bを備え、フロートアーム3が、主要部2A、軸受部14、及び対向片2B2とを貫通し、ホルダ2が、フレーム1に回動可能に保持され、
連結部2B3は、軸受部14と面していない外周面2B3aの端部に補強部2B4を有することによって、補強部2B4を備えていても、燃料タンクの開口に入れることが可能な小型の液面検出装置Fを提供することができる。
As described above, the present invention provides a liquid level detection device F including the holder 2 that holds the float arm 3 having a float that operates following the liquid level, and the frame 1 that rotatably supports the holder 2. The frame 1 includes a bearing portion 14 that rotatably holds the shaft portion 31 of the float arm 3 on the outer peripheral portion thereof. The holder 2 includes a main portion 2A, a facing piece 2B2, and a main portion 2A and the facing piece 2B2. And a holding portion 2B that disposes the bearing portion 14 between the main portion 2A and the opposing piece 2B2, and the float arm 3 includes the main portion 2A, the bearing portion 14, and the opposing portion. Through the piece 2B2, the holder 2 is rotatably held by the frame 1,
The connecting portion 2B3 has a reinforcing portion 2B4 at the end of the outer peripheral surface 2B3a that does not face the bearing portion 14, so that even if the reinforcing portion 2B4 is provided, a small liquid that can be put into the opening of the fuel tank. The surface detection device F can be provided.

また、本発明は、補強部2B4は、ホルダ2の回動中心Cを通りホルダ2の連結部2B3と対向する面Hとを最短で結ぶ直線Gと、外周面2B3aと直線Gとの交点Dを通り最短で結ぶ直線Gに対して直交する線(仮想線T)よりもホルダ2の回動中心Cの軸部31側に形成されることによって、補強部2B4が仮想線Tを超えて突出しないように形成されているので、補強部2B4を備えていても、燃料タンクの開口に入れることが可能な小型の液面検出装置Fを提供することができる。
Further, according to the present invention, the reinforcing part 2B4 has a straight line G that passes through the rotation center C of the holder 2 and faces the connecting part 2B3 of the holder 2 and faces the connecting part 2B3 at the shortest point, and an intersection D of the outer peripheral surface 2B3a and the straight line G. The reinforcing portion 2B4 protrudes beyond the imaginary line T by being formed closer to the shaft portion 31 side of the rotation center C of the holder 2 than the line (virtual line T) orthogonal to the straight line G passing through Therefore, even if the reinforcing portion 2B4 is provided, a small liquid level detecting device F that can be inserted into the opening of the fuel tank can be provided.

なお、本実施形態では、フレーム1に端子5が配置され、ホルダ2に収納された回路基板4が端子5と接触する構造であったが、フレーム1とホルダ2の関係が反対であってもよく、ホルダ2に端子5が配置され、フレーム1に収納された回路基板4が端子5と接触する構造でもよい。   In the present embodiment, the terminal 5 is disposed on the frame 1 and the circuit board 4 accommodated in the holder 2 is in contact with the terminal 5, but the relationship between the frame 1 and the holder 2 is opposite. The terminal 5 may be disposed on the holder 2 and the circuit board 4 accommodated in the frame 1 may be in contact with the terminal 5.

また、補強部2B4は、図6に示すように、連結部2B3の軸受部14と面していない外周面2B3aの端部のみでなく端部近傍に設けられていてもよい。   Further, as shown in FIG. 6, the reinforcing portion 2B4 may be provided not only at the end portion of the outer peripheral surface 2B3a not facing the bearing portion 14 of the connecting portion 2B3 but in the vicinity of the end portion.

以上によって、補強部を備えていても燃料タンクの開口に入れることが可能な小型の液面検出装置を提供することが可能となる。
As described above, it is possible to provide a small-sized liquid level detection device that can be inserted into the opening of the fuel tank even if the reinforcing portion is provided.

本発明は、タンク内の各種液体の液面を検出する液面検出装置に利用可能である。   The present invention is applicable to a liquid level detection device that detects the liquid level of various liquids in a tank.

F 液面検出装置
1 フレーム
2 ホルダ
2A 回路基板収納部(主要部)
2B 保持部
2B2 対向片
2B3 連結部
2B3a 外周壁(外周面)
2B4 補強部
2C1 第1係止部
2C2 第2係止部
2D 当接面
2E 垂れ下がり部
3 フロートアーム
4 回路基板
5 端子
6 配線コード
6A 芯線
6B 被覆部
7A 係合部
11 ベース部
13 フック部
13A 係止部
14 軸受部
14A 貫通孔
31 軸部
C 回動中心
D 交点
G 直線
T 仮想線(線)
F Liquid level detection device 1 Frame 2 Holder 2A Circuit board storage (main part)
2B Holding part 2B2 Opposing piece 2B3 Connecting part 2B3a Outer peripheral wall (outer peripheral surface)
2B4 Reinforcement part 2C1 1st latching part 2C2 2nd latching part 2D Contact surface 2E Hanging part 3 Float arm 4 Circuit board 5 Terminal 6 Wiring cord 6A Core wire 6B Covering part 7A Engaging part 11 Base part 13 Hook part 13A Engagement Stop part 14 Bearing part 14A Through hole 31 Shaft part C Center of rotation D Intersection G Straight line T Virtual line (line)

Claims (1)

液面に追従して動作するフロートを有するフロートアームを保持するホルダと、前記ホルダを回動可能に支持するフレームと、を備えた液面検出装置において、
前記フレームは、その外周部分に前記フロートアームの軸部を回動可能に保持する軸受部を備え、
前記ホルダは主要部とこの主要部と対向する対向片及び前記主要部と前記対向片を連結する連結部とを有し、前記主要部と前記対向片との間に前記軸受部を配置する保持部を備え、前記フロートアームが、前記主要部、前記軸受部、及び前記対向片とを貫通し、前記ホルダが、前記フレームに回動可能に保持され、
前記連結部は、前記軸受部と面していない外周面の端部又は端部近傍に補強部を有し、
前記補強部は、前記ホルダの回動中心を通り前記ホルダの前記連結部と対向する面とを最短で結ぶ直線と、前記外周面と前記直線との交点を通り前記最短で結ぶ直線に対して直交する線よりも前記ホルダの回動中心の前記軸部側
かつ前記直線に対し線対象に形成される
ことを特徴とする液面検出装置。
In a liquid level detection apparatus comprising: a holder that holds a float arm having a float that operates following the liquid level; and a frame that rotatably supports the holder.
The frame includes a bearing portion that rotatably holds the shaft portion of the float arm on an outer peripheral portion thereof.
The holder has a main part, an opposing piece that faces the main part, and a connecting part that connects the main part and the opposing piece, and holds the bearing part between the main part and the opposing piece. Part, the float arm penetrates the main part, the bearing part, and the opposing piece, the holder is rotatably held by the frame,
The connecting portion has a reinforcing portion at or near the end of the outer peripheral surface not facing the bearing portion ,
The reinforcing portion is connected to a straight line that connects the surface that passes through the rotation center of the holder and that faces the connecting portion of the holder, and a straight line that passes through the intersection of the outer peripheral surface and the straight line. The shaft side closer to the rotation center of the holder than the perpendicular line
The liquid level detection device is formed to be a line object with respect to the straight line .
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