JP5096284B2

JP5096284B2 - Magnet support structure

Info

Publication number: JP5096284B2
Application number: JP2008265588A
Authority: JP
Inventors: 幸春林
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2008-10-14
Filing date: 2008-10-14
Publication date: 2012-12-12
Anticipated expiration: 2028-10-14
Also published as: JP2010096543A

Description

本発明は、磁気検知素子を用いた位置検知装置における磁石の支持構造に関する。 The present invention relates to a magnet support structure in a position detection device using a magnetic detection element.

従来から、車両のシフト装置等に用いられる位置検知装置において、シフトレバーの先端に位置検知用磁石を設けたものが知られている。特許文献１。
また、車両用の軸受け装置の芯金に、磁気エンコーダを一体成形して装着したものが知られている。特許文献２。 2. Description of the Related Art Conventionally, a position detection device used in a vehicle shift device or the like is known in which a position detection magnet is provided at the tip of a shift lever. Patent Document 1.
In addition, it is known that a magnetic encoder is integrally molded and attached to a core of a bearing device for a vehicle. Patent Document 2.

先ず、図１９に、車両のシフト装置に用いられる、このような位置検知用磁石を利用した位置検知装置を示す。
シフトレバー１は、揺動支持部２を支点として揺動可能に構成されており、一方の先端部には磁石の支持部材３、他方には操作者による操作のためのシフトノブ４が形成されている。カバープレート５は、シフトレバー１の揺動を規制するためのガイドである。
そして、該支持部材３の先端には、平板状に形成された磁石６が取り付けられており、該磁石６から所定の空間を設けて対向する基板７上には、ホール素子等からなる複数の磁気検知素子８が設けられている。該磁石６は、図示しない構成により、該基板７面に対し平行な面内で移動することができるように構成されている。
操作者がシフトノブ４を操作すると、その操作位置に対応して磁石６が磁気検知素子８に対して変位するので、磁気検知素子８がその位置を検知し、位置検知信号を出力することができる。
この位置検知信号は、車両のギアチェンジ装置等にシフト信号として出力される。
特開２００７−２２３３８４号公報特開２００６−９８１５９号公報 First, FIG. 19 shows a position detection device using such a position detection magnet used in a vehicle shift device.
The shift lever 1 is configured to be swingable with a swing support portion 2 as a fulcrum. A magnet support member 3 is formed at one end portion, and a shift knob 4 for operation by an operator is formed at the other end portion. Yes. The cover plate 5 is a guide for restricting the swing of the shift lever 1.
A flat plate-shaped magnet 6 is attached to the tip of the support member 3, and a plurality of hall elements and the like are formed on the opposing substrate 7 by providing a predetermined space from the magnet 6. A magnetic sensing element 8 is provided. The magnet 6 can be moved in a plane parallel to the surface of the substrate 7 by a configuration not shown.
When the operator operates the shift knob 4, the magnet 6 is displaced with respect to the magnetic detection element 8 corresponding to the operation position, so that the magnetic detection element 8 can detect the position and output a position detection signal. .
This position detection signal is output as a shift signal to a vehicle gear change device or the like.
JP 2007-223384 A JP 2006-98159 A

このような位置検知装置に使用される磁石の支持構造では、磁石が支持部材から脱落しないように確実に保持されること、あるいは磁石の一部が破損しても機能に影響しないこと、さらには破損した磁石の一部が飛散しないことなどの安全策が必要となる。
しかしながら、上述した車両用の軸受け装置の芯金に磁気エンコーダを一体成形して装着したものでは、磁石の脱落防止策は一応、採られているものの、そのように磁石の一部が破損して脱落する場合等の安全策は図られていない。 In the support structure of the magnet used in such a position detection device, the magnet is securely held so that it does not fall off from the support member, or even if a part of the magnet is broken, the function is not affected. Safety measures such as preventing a part of a broken magnet from scattering are necessary.
However, in the case where the magnetic encoder is integrally molded and mounted on the core of the vehicle bearing device described above, measures for preventing the magnet from falling off are taken for the time being. No safety measures are taken in case of dropout.

本発明は、上述した課題を解決するためになされたものであり、磁石が支持部材から脱落することが無く、磁石の支持機能が一部破損したとしても、磁石としての機能に影響が無く、また破損部分の飛散もない磁石支持構造を提供するものである。 The present invention has been made to solve the above-described problem, the magnet does not fall off the support member, even if the support function of the magnet is partially broken, there is no effect on the function as a magnet, Further, the present invention provides a magnet support structure in which no broken portion is scattered.

上記目的を達成するため、本発明では、鉄ヨークに固定された磁石を支持部材に取り付ける支持構造であって、前記磁石は、前記鉄ヨークの板部に設けた透孔内に位置する磁石磁石接続部と、前記板部の表面側に位置する磁石本体と、前記板部の裏面側に位置する磁石固定部とを有し、前記支持部材は、前記板部の表面側を外側にして前記磁石本体を把持する把持部と、前記板部の裏面側から前記磁石固定部に近接する破片脱落阻止部とを有するとともに、前記破片脱落阻止部は、前記板部の裏面に対し前記磁石固定部の厚み未満の距離で近接していることを特徴とする構成とした。
また、上記目的を達成するため、本発明では、鉄ヨークの透孔の周囲に前記磁石固定部を支持する嵌凹部を設けたことを特徴とする構成とした。
更に、上記目的を達成するため、本発明では、鉄ヨークの透孔の周囲の表側に突出部を設けたことを特徴とする構成とした。 In order to achieve the above object, according to the present invention, there is provided a support structure for attaching a magnet fixed to an iron yoke to a support member, wherein the magnet is located in a through hole provided in a plate portion of the iron yoke. A connecting portion; a magnet main body positioned on the front surface side of the plate portion; and a magnet fixing portion positioned on the rear surface side of the plate portion; While having a grip part which grips a magnet body, and a piece drop prevention part which adjoins to the magnet fixed part from the back side of the plate part, the fragment drop prevention part is the magnet fixed part to the back side of the plate part It is set as the structure characterized by adjoining by the distance less than this thickness.
In order to achieve the above object, according to the present invention, a fitting recess for supporting the magnet fixing portion is provided around the through hole of the iron yoke.
Furthermore, in order to achieve the above object, the present invention has a configuration characterized in that a protrusion is provided on the front side around the through hole of the iron yoke.

本発明を上記のように構成したことにより、磁石の一部が破損したとしても磁石本体の機能に影響が無く、また破損部分の装置内への飛散が防止されるので、安全性に優れた磁石支持構造を提供することができる。 By configuring the present invention as described above, even if a part of the magnet is broken, there is no influence on the function of the magnet body, and scattering of the broken part into the device is prevented, so that the safety is excellent. A magnet support structure can be provided.

以下、本発明による位置検知用の磁石の支持構造について、その実施の形態を、図１〜１８に基づいて説明する。
図１から図５は鉄ヨークに固定された磁石を示す図であり、図１はその斜視図、図２は磁石側からの平面図、図３は鉄ヨーク側からの平面図、図４は図１でのＸ方向からの側面図、図５は図３のＹ―Ｙ断面図である。図６は支持部材の裏面図、図７は支持部材の正面図、図８は支持部材の側面図、図９は磁石を装着した支持部材の裏面図、図１０は磁石を装着した支持部材の正面図、図１１は磁石を装着した支持部材の側面図、図１２は図１０のＢ−Ｂ断面図、図１３は図１２の部分Ｄの拡大図、図１４は図１０のＥ−Ｅ断面図、図１５は図１４の部分Ｃの拡大図、図１６は部分Ｃの説明図、図１７は部分Ｃの変形例、図１８は図１４の部分Ｆの拡大図である。 Embodiments of a support structure for a position detecting magnet according to the present invention will be described below with reference to FIGS.
FIGS. 1 to 5 are views showing a magnet fixed to an iron yoke, FIG. 1 is a perspective view thereof, FIG. 2 is a plan view from the magnet side, FIG. 3 is a plan view from the iron yoke side, and FIG. FIG. 5 is a side view from the X direction in FIG. 1, and FIG. 5 is a YY sectional view of FIG. 6 is a back view of the support member, FIG. 7 is a front view of the support member, FIG. 8 is a side view of the support member, FIG. 9 is a back view of the support member equipped with a magnet, and FIG. FIG. 11 is a side view of a support member equipped with a magnet, FIG. 12 is a cross-sectional view taken along the line BB in FIG. 10, FIG. 13 is an enlarged view of a part D in FIG. FIG. 15 is an enlarged view of a part C in FIG. 14, FIG. 16 is an explanatory view of the part C, FIG. 17 is a modification of the part C, and FIG. 18 is an enlarged view of the part F in FIG.

本発明の位置検知用の磁石は、図１から図５に示すように、平板状の鉄ヨーク９の板部に平板状の磁石６が固定されたものである。
該鉄ヨーク９の両端部には、切欠９ａと凸部９ｂが設けられており、該切欠９ａは後述する支持部材３の固定用フック１０に係合する。また該凸部９ｂは、図２から見て手前（表側。図３から見ると、向こう側）へ突出するように形成されており、後述する支持部材３のヨーク受け部１１に嵌合する。図２、３、及び９に示されている凹部９ｂ’は該凸部９ｂの成型に伴ってその反対側に形成されたものである。以下、鉄ヨーク９の板部の図２から見て手前側を表面側、向こう側を裏面側と表現する。
また、該鉄ヨーク９の中央部には、複数の透孔９ｃが設けられており、該透孔９の周囲には、図１５に示すように、磁石６側（表側）に突出する突出部９ｄと、磁石固定部６ｂを支持する嵌凹部９ｅとが形成されている。
なお、鉄ヨーク９は、当然ながら必ずしも鉄で構成されている必要はない。
一方、磁石６は、図５及び図１５に示すように、鉄ヨーク９の板状部上に形成される磁石本体、該鉄ヨーク９の裏面側に位置する磁石固定部６ｂ、および該鉄ヨーク９の透孔９ｃ内に位置して磁石本体と磁石固定部６ｂとを結合する磁石接続部６ｃを有している。
また、磁石６には、図２及び図４に示すように、鉄ヨーク９に切欠９ａが形成されている側の側部に、側部の長手方向に沿って段差部６ａが形成されており、該段差部６ａは、後述する支持部材３のヨーク受け１１に把持される。 As shown in FIGS. 1 to 5, the position detecting magnet of the present invention is obtained by fixing a flat magnet 6 to a plate portion of a flat iron yoke 9.
At both ends of the iron yoke 9, a notch 9a and a protrusion 9b are provided, and the notch 9a engages with a fixing hook 10 of the support member 3 to be described later. Further, the convex portion 9b is formed so as to protrude to the near side (front side, as viewed from FIG. 3) as viewed from FIG. 2, and is fitted to a yoke receiving portion 11 of the support member 3 to be described later. The concave portion 9b 'shown in FIGS. 2, 3, and 9 is formed on the opposite side of the convex portion 9b as it is molded. Hereinafter, the front side of the plate portion of the iron yoke 9 as viewed from FIG. 2 is expressed as a front surface side, and the other side is expressed as a back surface side.
Further, a plurality of through holes 9c are provided in the central portion of the iron yoke 9, and as shown in FIG. 15, projecting portions projecting to the magnet 6 side (front side) are provided around the through holes 9. 9d and the fitting recessed part 9e which supports the magnet fixing | fixed part 6b are formed.
Needless to say, the iron yoke 9 does not necessarily need to be made of iron.
On the other hand, as shown in FIGS. 5 and 15, the magnet 6 includes a magnet body formed on the plate-like portion of the iron yoke 9, a magnet fixing portion 6 b located on the back side of the iron yoke 9, and the iron yoke. 9 has a magnet connection portion 6c that is located in the through-hole 9c and connects the magnet body and the magnet fixing portion 6b.
Further, as shown in FIGS. 2 and 4, the magnet 6 has a step portion 6 a formed along the longitudinal direction of the side portion on the side portion where the notch 9 a is formed in the iron yoke 9. The step portion 6a is held by a yoke receiver 11 of the support member 3 described later.

このように磁石６と鉄ヨーク９とが結合した磁石の製造は、まず、フェライトや希土類等の磁性粉を含むボンド磁石用材料を原料として用い、前記切欠９ａ、凸部９ｂ及び透孔９ｃを形成済みの鉄ヨーク９にアウトサート一体成型することで、鉄ヨーク９と一体となった平板状の磁性体を作製し、次に、その磁性体を着磁することにより行われる。
このようにして製造された磁石は、磁石本体と該磁石本体と接続部６ｃにより連結された磁石固定部６ｂで鉄ヨーク９を挟み込むことにより鉄ヨーク９の厚み方向での磁石の移動を規制している。また鉄ヨーク９の透孔９ｃに嵌凹部９ｅを設け、その中に磁石固定部６ｂを形成したので、磁石固定部６ｂの周囲と鉄ヨーク９の該嵌凹部９ｅの内壁が当接することによって、磁石固定部６ｂと鉄ヨーク９の板面方向の移動が規制される。また、鉄ヨーク９の表面においては、透孔９ｃの周囲に突出部９ｄを設けたので、鉄ヨーク９の該突出部の外壁とその周囲の磁石本体とで鉄ヨーク９の板面方向の移動が規制され、前述の磁石固定部６ｂの周囲構造とあいまって鉄ヨーク９に対する磁石本体の固定を強固にしている。 As described above, the manufacture of the magnet in which the magnet 6 and the iron yoke 9 are combined as described above is performed by using, as a raw material, a bonded magnet material containing magnetic powder such as ferrite or rare earth, and the notches 9a, protrusions 9b, and through holes 9c. By performing outsert integral molding on the formed iron yoke 9, a flat plate-like magnetic body integrated with the iron yoke 9 is produced, and then the magnetic body is magnetized.
The magnet manufactured in this manner regulates the movement of the magnet in the thickness direction of the iron yoke 9 by sandwiching the iron yoke 9 between the magnet main body and the magnet fixing portion 6b connected to the magnet main body by the connection portion 6c. ing. Further, since the fitting recess 9e is provided in the through hole 9c of the iron yoke 9 and the magnet fixing portion 6b is formed therein, the periphery of the magnet fixing portion 6b and the inner wall of the fitting recess 9e of the iron yoke 9 are in contact with each other. The movement of the magnet fixing portion 6b and the iron yoke 9 in the plate surface direction is restricted. Further, since the protrusion 9d is provided around the through hole 9c on the surface of the iron yoke 9, the movement of the iron yoke 9 in the plate surface direction is performed between the outer wall of the protrusion of the iron yoke 9 and the surrounding magnet body. Is restricted, and together with the surrounding structure of the magnet fixing portion 6b, the magnet body is firmly fixed to the iron yoke 9.

次に、この磁石の支持部材３について説明する。
図６〜８は支持部材３のみの説明図、図９〜１１は該支持部材３が磁石を支持している状態での説明図である。
この支持部材３は、合成樹脂を射出成型するなどにより形成されたものである。
鉄ヨーク９と一体の磁石６は、図６及び図７に示す状態では、該支持部材３に対し、紙面に対し上方から紙面に平行に挿入される（図７の状態では、紙面の手前側に磁石６を手前にして、図６の状態では紙面の向こう側に磁石６を向こうにして挿入される）。 Next, the magnet support member 3 will be described.
6 to 8 are explanatory views of only the support member 3, and FIGS. 9 to 11 are explanatory views in a state where the support member 3 supports the magnet.
The support member 3 is formed by injection molding of synthetic resin.
In the state shown in FIGS. 6 and 7, the magnet 6 integrated with the iron yoke 9 is inserted into the support member 3 in parallel to the paper surface from above (in the state of FIG. 7, the front side of the paper surface). (In the state of FIG. 6, the magnet 6 is inserted so as to face away from the paper surface).

該支持部材３は、後述するように、鉄ヨーク９の切欠９ａに先端部を嵌合させることにより、鉄ヨーク９が抜け落ちることを防ぐ固定用フック１０を有している（図６ないし図８）。
また、該支持部材３は、後述するように、鉄ヨーク９及び磁石６を把持するためのヨーク受け部１１と、鉄ヨーク９及び磁石６を把持すると共に鉄ヨークの位置決めをするヨーク突き当て受け部１２を有している（図６ないし図８）。
また、該支持部材３は、図６及び図８等に示すように、該支持部材３をシフトレバー等の被位置検知部材へ取り付けるための円筒状の取り付け部１３を有している。
更に、該支持部材３は、後述するように、磁石６の磁石接続部６ｃが破損した場合にであっても、磁石固定部６ｂが支持部材３内から外部に漏出しないように、破片脱落阻止形状部１４を有している（図７）。 As will be described later, the support member 3 has a fixing hook 10 that prevents the iron yoke 9 from falling off by fitting the tip portion into the notch 9a of the iron yoke 9 (FIGS. 6 to 8). ).
Further, as will be described later, the support member 3 includes a yoke receiving portion 11 for holding the iron yoke 9 and the magnet 6, and a yoke abutment receiving portion for holding the iron yoke 9 and the magnet 6 and positioning the iron yoke. It has a portion 12 (FIGS. 6 to 8).
Further, as shown in FIGS. 6 and 8, the support member 3 has a cylindrical attachment portion 13 for attaching the support member 3 to a position detection member such as a shift lever.
Further, as will be described later, the support member 3 prevents debris from falling off so that the magnet fixing portion 6b does not leak from the support member 3 to the outside even when the magnet connection portion 6c of the magnet 6 is damaged. It has the shape part 14 (FIG. 7).

固定用フック１０は、図８に示すように、支持部材３にその基部が固定された弾性を有する軸部１０ａと、該軸部１０ａの先端に、鉄ヨーク９の挿入方向奥側に向かって徐々に高く形成された先端部１０ｂを有している。
このように形成された該固定用フック１０は、図８に示す支持部材３の上方からの鉄ヨーク９の挿入につれて先端部１０ｂが強制的に押し下げられて一旦左方に撓み、その後、切欠９ａに嵌合して右方に弾性復帰することで、その先端部１０ｂが鉄ヨーク９を固定する。このように固定されている状態を、図１１及び図１２に示す。 As shown in FIG. 8, the fixing hook 10 has an elastic shaft portion 10a whose base portion is fixed to the support member 3, and a distal end of the shaft portion 10a toward the inner side of the iron yoke 9 in the insertion direction. It has the front-end | tip part 10b formed gradually high.
In the fixing hook 10 formed in this way, the tip end portion 10b is forcibly pushed down as the iron yoke 9 is inserted from above the support member 3 shown in FIG. 8, and once bent to the left, and then the notch 9a. And the tip 10b of the iron yoke 9 is fixed by elastically returning to the right. The state fixed in this way is shown in FIGS.

ヨーク受け部１１は、図１２（図１０のＢ−Ｂ断面図）のＤ部分拡大図である図１３に示すように、鉄ヨークの端部を表面側から当接する部位のうち、矢印で示す鉄ヨーク９の挿入方向に対し手前側の部位に凸部１１ｂを有するとともに、その部位の挿入方向の奥側には該凸部９ｂを収納して嵌合する空間部１１ｃが形成されている。
該凸部１１ｂは鉄ヨーク９に形成されている凸部９ｂとほぼ同様な高さを有し、鉄ヨーク９の凸部９ｂが該空間部１１ｃ内に収納された状態において、鉄ヨーク９の端部を表側から押圧して把持するように構成されている。このとき、鉄ヨーク９の裏面側は、該裏面側と対面する側の、支持部材３に設けられた凸部１５に支持されている（図７、８及び図１１）。
したがって、鉄ヨーク９の挿入にともない、図１３においては、鉄ヨーク９の凸部９ｂにより該ヨーク受け部１１が右方に一旦撓み、該凸部９ｂが該凸部１１ｂを越えたところで、該ヨーク受け部１１が左方に復帰すると共に、鉄ヨーク９の凸部９ｂが空間部１１ｃ内に収納され嵌合する。これにより、該凸部１１ｂは、鉄ヨーク９を表面側から把持すると共に、挿入方向とは反対方向への抜け落ちを防止する。つまり、例え、固定用フック１０が破損したとしても、鉄ヨーク９の凸部９ｂとヨーク受け部１１の凸部１１ｂとにより、鉄ヨーク９が支持部材３から外れることがない。
さらに該ヨーク受け部１１は、その先端部に、図１４（図１０のＥ−Ｅ断面図）のＦ部分拡大図である図１８に示すように、磁石６の段差部６ａに表面側から当接し、該段差部６ａを直接把持する把持部１１ａを有している。 As shown in FIG. 13, which is an enlarged view of a portion D of FIG. 12 (a cross-sectional view taken along the line BB in FIG. 10), the yoke receiving portion 11 is indicated by an arrow among the portions that contact the end of the iron yoke from the surface side. A convex portion 11b is provided at a portion on the near side with respect to the insertion direction of the iron yoke 9, and a space portion 11c is formed on the rear side in the insertion direction of the portion to accommodate and fit the convex portion 9b.
The convex portion 11b has substantially the same height as the convex portion 9b formed on the iron yoke 9, and the convex portion 9b of the iron yoke 9 is accommodated in the space portion 11c. The end is pressed and gripped from the front side. At this time, the back surface side of the iron yoke 9 is supported by the convex portion 15 provided on the support member 3 on the side facing the back surface side (FIGS. 7, 8 and 11).
Accordingly, with the insertion of the iron yoke 9, in FIG. 13, the yoke receiving portion 11 is once bent rightward by the convex portion 9b of the iron yoke 9, and when the convex portion 9b exceeds the convex portion 11b, The yoke receiving portion 11 returns to the left, and the convex portion 9b of the iron yoke 9 is housed and fitted in the space portion 11c. Thereby, the convex portion 11b grips the iron yoke 9 from the surface side and prevents the iron yoke 9 from coming off in the direction opposite to the insertion direction. That is, even if the fixing hook 10 is broken, the iron yoke 9 is not detached from the support member 3 by the convex portion 9 b of the iron yoke 9 and the convex portion 11 b of the yoke receiving portion 11.
Furthermore, as shown in FIG. 18 which is an F partial enlarged view of FIG. 14 (cross-sectional view taken along the line EE of FIG. 10), the yoke receiving portion 11 contacts the step portion 6a of the magnet 6 from the front side. It has a gripping portion 11a that is in contact with and directly grips the stepped portion 6a.

ヨーク突き当て受け部１２は、図１２に示すように、鉄ヨーク９の挿入に際し、鉄ヨーク９の先端部が突き当たることで該鉄ヨーク９を支持部材３に位置決めする突き当て部１２ｂを有する。
そして、該ヨーク突き当て部１２ｂに鉄ヨーク９の端部が突き当たる位置で、上記した固定用フック１０による鉄ヨーク９の固定と、鉄ヨーク９の凸部９ｂによる空間部１１ｃへの嵌合が行われるように、固定用フック１０及び凸部９ｂの位置が設定されている。
さらに、該ヨーク突き当て受け部１２の先端部には、ヨーク受け部１１と同様に、鉄ヨーク９及び磁石６の段差部６ａを表面側からそれぞれ把持する把持部１２ａが設けられている。鉄ヨーク９の該把持部１１ａ及び１２ａが、そのように鉄ヨーク９及び磁石６の段差部６ａを把持している状態を図１０に示す。 As shown in FIG. 12, the yoke abutment receiving portion 12 has an abutment portion 12 b that positions the iron yoke 9 on the support member 3 when the end of the iron yoke 9 abuts when the iron yoke 9 is inserted.
Then, at the position where the end of the iron yoke 9 abuts against the yoke abutting portion 12b, the fixing of the iron yoke 9 by the fixing hook 10 and the fitting of the iron yoke 9 to the space portion 11c by the convex portion 9b are performed. As is done, the positions of the fixing hook 10 and the convex portion 9b are set.
Further, similarly to the yoke receiving portion 11, a gripping portion 12 a for holding the iron yoke 9 and the stepped portion 6 a of the magnet 6 from the surface side is provided at the tip of the yoke abutting receiving portion 12. FIG. 10 shows a state in which the gripping portions 11 a and 12 a of the iron yoke 9 grip the stepped portion 6 a of the iron yoke 9 and the magnet 6 as such.

図１４は、磁石を支持部材３に取り付けたときの、磁石６と鉄ヨーク９及び支持部材３の係合の状態を示しており、図１５から図１８は図１４の主要な部分を拡大して示している。
図１５に示す図１４のＣ部分の拡大断面図に示すように、支持部材３の破片脱落阻止部１４が鉄ヨーク９の裏面に近接し、その一部が磁石固定部６ｂに対向するように設けられている。
そして、該破片脱落阻止部１４は、図１６に示すように、磁石固定部６ｂの厚さａに対し鉄ヨーク９の裏面に対向する距離ｂが、ｂ＜ａとなるように、鉄ヨーク裏面に対し近接して設けられている。また、前述したように、磁石固定部６ｂは嵌凹部９ｅ内に位置しており、該嵌凹部９ｅの深さは、距離ｂより大なる寸法に設定されている。
したがって、磁石接続部６ｃが破損して磁石固定部６ｂが脱落したとしても、該破片脱落阻止部１４と嵌凹部９ｅの壁面によって支持部材３の外部に漏出するための空間が塞がれているので、脱落した該磁石固定部６ｂが、支持部材３の外部へ漏出することが阻止され、位置検知装置内への飛散が防止される。 FIG. 14 shows the state of engagement of the magnet 6 with the iron yoke 9 and the support member 3 when the magnet is attached to the support member 3. FIGS. 15 to 18 are enlarged views of the main part of FIG. It shows.
As shown in the enlarged cross-sectional view of the portion C in FIG. 14 shown in FIG. 15, the fragment drop-off prevention portion 14 of the support member 3 is close to the back surface of the iron yoke 9, and a part thereof faces the magnet fixing portion 6b. Is provided.
Then, as shown in FIG. 16, the fragment drop-off preventing portion 14 is formed so that the distance b facing the back surface of the iron yoke 9 with respect to the thickness a of the magnet fixing portion 6b satisfies b <a. Are provided close to each other. Further, as described above, the magnet fixing portion 6b is located in the fitting recess 9e, and the depth of the fitting recess 9e is set to a dimension larger than the distance b.
Therefore, even if the magnet connection portion 6c is damaged and the magnet fixing portion 6b is dropped, the space for leaking outside the support member 3 is blocked by the wall surface of the fragment drop prevention portion 14 and the fitting recess 9e. Therefore, the magnet fixing portion 6b that has dropped off is prevented from leaking out of the support member 3, and scattering into the position detection device is prevented.

上記したように、磁石接続部６ｃが例え破損したとしても、磁石破片（磁石固定部６ａ）の位置検知装置内への飛散が防止されるが、さらに磁石本体６も、支持体３から離脱するおそれはない。
つまり、磁石本体６は、図１４のＦ部分を拡大した図１８に示すように、その段差部６ａがヨーク受け部１１及びヨーク突き当て受け部１２により把持されて鉄ヨーク９の厚み方向での移動が規制され、しかも図１５ないし図１６に示すように、鉄ヨーク９の突出部９ｄにより鉄ヨーク９の板面方向での移動も規制されるので、支持体３から離脱するおそれはない。 As described above, even if the magnet connection portion 6c is damaged, the magnet fragments (magnet fixing portion 6a) are prevented from scattering into the position detection device, but the magnet body 6 is also detached from the support 3. There is no fear.
That is, as shown in FIG. 18 in which the F portion of FIG. 14 is enlarged, the magnet body 6 has its stepped portion 6a gripped by the yoke receiving portion 11 and the yoke abutting receiving portion 12 in the thickness direction of the iron yoke 9. Since the movement is restricted and the movement of the iron yoke 9 in the direction of the plate surface is also restricted by the protruding portion 9d of the iron yoke 9, as shown in FIGS.

また、上記した実施の形態では、図１５ないし図１６に示すように、破片脱落阻止部１４は、その一部が磁石固定部６ｂに対向するように設けられているが、図１７に示すように、磁石固定部６ｂを包囲して鉄ヨーク９に近接する突出部を設けてそれを破片脱落阻止部１４’とし、その鉄ヨーク裏面に対する近接距離ｂを磁石固定部６ｂの厚さａ未満にすることにより、上記した破片脱落阻止部１４と同様の効果を奏することが出来る。 Further, in the above-described embodiment, as shown in FIGS. 15 to 16, the fragment drop-off prevention portion 14 is provided so that a part thereof faces the magnet fixing portion 6b, but as shown in FIG. In addition, a protruding portion that surrounds the magnet fixing portion 6b and is close to the iron yoke 9 is provided as a fragment drop prevention portion 14 ', and the proximity distance b to the iron yoke back surface is less than the thickness a of the magnet fixing portion 6b. By doing so, it is possible to achieve the same effect as the above-described fragment drop-off preventing portion 14.

本実施の形態に係る鉄ヨークに固定された磁石の斜視図。The perspective view of the magnet fixed to the iron yoke which concerns on this Embodiment. 本実施の形態に係る位置検知用磁石の磁石側（表面側）からの平面図。The top view from the magnet side (surface side) of the position detection magnet which concerns on this Embodiment. 本実施の形態に係る磁石の鉄ヨーク側（裏面側）からの平面図。The top view from the iron yoke side (back surface side) of the magnet which concerns on this Embodiment. 本実施の形態に係る磁石の図１でのＸ方向からの側面図。The side view from the X direction in FIG. 1 of the magnet which concerns on this Embodiment. 本実施の形態に係る磁石の図３のＹ―Ｙ断面図。YY sectional drawing of the magnet which concerns on this Embodiment of FIG. 本実施の形態に係る支持部材の裏面図。The back view of the supporting member which concerns on this Embodiment. 本実施の形態に係る支持部材の正面図。The front view of the supporting member which concerns on this Embodiment. 本実施の形態に係る支持部材の側面図。The side view of the supporting member which concerns on this Embodiment. 本実施の形態に係る磁石を装着した支持部材の裏面図。The back view of the support member equipped with the magnet concerning this embodiment. 本実施の形態に係る磁石を装着した支持部材の正面図。The front view of the support member equipped with the magnet concerning this embodiment. 本実施の形態に係る磁石を装着した支持部材の側面図。The side view of the support member equipped with the magnet concerning this embodiment. 本実施の形態に係る図１０のＢ−Ｂ断面図。BB sectional drawing of FIG. 10 which concerns on this Embodiment. 本実施の形態に係る図１２の部分Ｄの拡大図。The enlarged view of the part D of FIG. 12 which concerns on this Embodiment. 本実施の形態に係る図１０のＥ−Ｅ断面図。EE sectional drawing of FIG. 10 which concerns on this Embodiment. 本実施の形態に係る図１４の部分Ｃの拡大図。The enlarged view of the part C of FIG. 14 which concerns on this Embodiment. 本実施の形態に係る図１５の部分Ｃの説明図。Explanatory drawing of the part C of FIG. 15 which concerns on this Embodiment. 本実施の形態に係る部分Ｃの変形例。The modification of the part C which concerns on this Embodiment. 本実施の形態に係る図１４の部分Ｆの拡大図。The enlarged view of the part F of FIG. 14 which concerns on this Embodiment. 従来例に係る車両のシフト位置検知装置の説明図。Explanatory drawing of the shift position detection apparatus of the vehicle which concerns on a prior art example.

Explanation of symbols

１シフトレバー、
２揺動支持部、
３支持部材、
４シフトノブ、
５カバープレート、
６位置検知用磁石、
６ａ段差部、
６ｂ磁石固定部、
６ｃ磁石接続部、
７基板、
８磁気検知素子、
９鉄ヨーク、
９ａ切欠、
９ｂ（鉄ヨークの）凸部、
９ｃ透孔、
９ｄ突出部、
９ｅ嵌凹部、
１０固定用フック、
１１ヨーク受け部、
１１ａ把持部、
１１ｂ（ヨーク受け部の）凸部、
１１ｃ空間部、
１２ヨーク突き当て受け部、
１２ａ把持部、
１２ｂヨーク突き当て部、
１３取り付け部、
１４、１４’ 破片脱落阻止部、
１５（支持部材の）凸部。 1 Shift lever,
2 swing support,
3 support members,
4 Shift knob,
5 Cover plate,
6 Position detection magnet,
6a steps,
6b Magnet fixing part,
6c Magnet connection part,
7 Substrate,
8 Magnetic sensing element,
9 Iron yoke,
9a Notch,
9b convex part (of iron yoke),
9c through-hole,
9d protrusion,
9e fitting recess,
10 Hook for fixing,
11 Yoke receiving part,
11a gripping part,
11b (yoke receiving part) convex part,
11c space part,
12 Yoke abutment receiving part,
12a gripping part,
12b Yoke contact part,
13 Mounting part,
14, 14 'debris fall prevention part,
15 Convex part (of support member).

Claims

A support structure in which a magnet fixed to an iron yoke is attached to a support member, the magnet being positioned on a surface side of the plate portion and a magnet connection portion located in a through hole provided in the plate portion of the iron yoke A magnet body, and a magnet fixing part located on the back side of the plate part, and the support member holds the magnet body with the surface side of the plate part outside, and the plate part A debris drop-off prevention portion that is close to the magnet fixing portion from the back side of the plate, and the debris drop-off prevention portion is close to the back surface of the plate portion at a distance less than the thickness of the magnet fixing portion. Characteristic magnet support structure.

2. The magnet support structure according to claim 1, wherein the iron yoke is provided with a fitting recess for supporting the magnet fixing portion around the through hole.

2. The magnet support structure according to claim 1, wherein the iron yoke is provided with a protrusion on the front side around the through hole.