JP3773091B2

JP3773091B2 - Assembly structure of parts

Info

Publication number: JP3773091B2
Application number: JP37255899A
Authority: JP
Inventors: 則広田村; 勝仁梅沢
Original assignee: Nippon Seiki Co Ltd
Current assignee: Nippon Seiki Co Ltd
Priority date: 1999-12-28
Filing date: 1999-12-28
Publication date: 2006-05-10
Anticipated expiration: 2019-12-28
Also published as: JP2001180329A

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば車両用の計器装置を構成する部品の組付構造に関するものである。
【０００２】
【従来の技術】
一般に、車両用の計器装置は図８に示す様に、合成樹脂性のケース１内に速度計や回転計などの計器２と車両の走行距離を示すいわゆるオドメータやトリップメータなどの積算計（図示しない）を収納してある。これらの計器２は計器本体３と、この計器本体３の前方に配設した導光板４と、この導光板４の前面に配設した表示板５と、前記計器本体３の作動に応じて回動する指針６を備えている。７は各計器２間の隙間や計器２とケース１との隙間を覆い隠す見返し板であり、８はケース１の前面開口側を覆う透視板である。また、９は前記計器２と電気的に接続され、計器２を駆動する電子部品や表示板５および指針６を照明する光源としてのバルブ１０などを搭載した回路基板であり、後述するタクトスイッチ１１も備えている。
【０００３】
この様な計器装置において、前記積算計は液晶などを用いた電子表示器として採用するものが多く有り、この積算計の表示切り替えや距離表示をゼロにリセットする等の操作のために合成樹脂からなる操作軸１２を備えている。操作軸１２の先端側は見返し板７及び透視板８に設けてある挿通穴１３，１３Ａから上方に突き出している。そして、この操作軸１２で回路基板９に設けてあるタクトスイッチ１１を押圧操作することにより、前記操作を行うことが出来る。ここで図９は、図８に示した操作軸１２と直交する方向の断面を表す。
【０００４】
操作軸１２は円柱状の操作部１４と、タクトスイッチ１１を押す押圧部１５と、操作軸１２中程の操作部１４周囲に設けた有底円筒状のボス部１６と、このボス部１６周囲より外側に突き出た２本の腕片１７と、腕片１７の下方に後述するケース１の係合部１８に係着する係止部１９とからなる。この係止部１９は左右方向に弾性変形可能に設けた係止片２０と、この係止片２０の先端に直角に突設した係止爪２１とからなる。また、図９に示す様に係止片２０を設けた方向と直交する方向には２本の腕片１７と、腕片１７の下方に上下方向に弾性変形可能な屈曲片２２が設けてあり、その先端はケース１に当接している。
【０００５】
ケース１には前記係止片２０と対応する位置に係合部１８が設けてあり、また、図９に示す様に屈曲片２２の先端側と対応するケース１箇所にはリブ２３を設けてリブ２３間で屈曲片２２先端および操作軸１２が左右方向に大きく動かないようにしてある。また、押圧部１５が挿通される孔２４の周囲には傾斜面を有する周壁２５を設けて、操作軸１２をケース１にセットする際に押圧部１５を孔２４に入れやすくしてある。なお、見返し板７裏側の挿通穴１３周囲には円筒状の挿入部２６が設けてあり、この挿入部２６下端側は操作軸１２のボス部１６内に挿入されている。この様にすることによって、バルブ１０が点灯しても、その光が見返し板７に設けてある挿通穴１３から上方に漏れないようにある。
【０００６】
この様に構成した計器装置の組み付けは、回路基板９にケース１を載置してケース１内に操作軸１２や計器２などを収納した後、見返し板７の挿通穴１３に操作軸１２の操作部１４を通して見返し板７を計器２の前面側に組み付ける。同様にして透視板８をケース１の前面開口側に組み付ける。なお、見返し板７および透視板８にそれぞれ設けてある挿通穴１３，１３Ａと操作部１４との寸法関係は、操作軸１２がケース１に固定されたものではなく、あるいは確実に位置決めされたものでもないために、傾いたり、位置ズレして組み付けられる可能性があり、操作部１４と見返し板７あるいは透視板８との隙間はこれらを考慮した寸法（本例の場合は周囲1.5〜２ｍｍ）となっている。また、タクトスイッチ１１を押圧操作する場合は、前述したように透視板８の挿通孔１３Ａから前方に突き出している操作軸１２の操作部１４を下方に押してやることにより、屈曲片２２が撓みながら操作軸１２が下動し押圧部１５がタクトスイッチ１１を押しトリップメータの距離表示をゼロにリセットする。その後、操作軸１２は屈曲片２２の弾性により元の位置に戻る。
【０００７】
【発明が解決しようとする課題】
しかしながら、見返し板７を組み付ける際、前述した如く、操作軸１２が傾いたり、位置ズレしてケース１に組み付けられていた場合、操作軸１２のボス部１６位置に対して見返し板７の挿入部２６が一方に偏った状態で挿入されようとする。すると、挿入部２６下端がボス部１６先端に当接してしまい、ボス部１６内に挿入部２６がスムーズに入らないことがある。あるいは、操作軸１２が傾いたり位置ズレしていない場合でも見返し板７の挿入部２６が一方に偏った状態で挿入されようとすると、同様にボス部１６内に挿入部２６がスムーズに入らないことがある。見返し板７を組み付ける際に操作軸１２のボス部１６および見返し板７の挿入部２６が見えないため、この様な傾向はより強い。
【０００８】
なお、この様な状態を解決する一方法として、操作軸１２と見返し板７の挿入部２６との径方向の位置ズレがあったとしても、見返し板７に設けてある挿入部２６が操作軸１２のボス部１６内にスムーズに挿入されるようにボス部１６に大きな誘い込みを設けてやれば良いが、ボス部１６の径方向の寸法を大きくする必要があり、延いては計器装置が大きくなったり、照明に影響を与える虞がある。
【０００９】
本発明はこの様な点に鑑みなされたもので、コンパクトな形状でもって組付作業性が良好な部品の組付構造を提供することを目的とする。
【００１０】
【課題を解決するための手段】
本発明は前記目的を達成するため、略円筒状のボス部を有する第１の部品と、この第１の部品のボス部内に挿入される挿入部を有する第２の部品との組付構造であって、前記ボス部先端の切り口面は前記ボス部中心側の角部に面取りを有し、前記切り口面が高低に形成されるとともに、前記第２の部品が前記第１の部品に対して一方に偏った状態で前記挿入部を前記ボス部内に挿入しようとした際、前記挿入部の外周が前記ボス部の外周よりはみ出さないようにする規制部を前記第１の部品に設けたものである。
【００１１】
また、略円筒状のボス部を有する第１の部品と、この第１の部品のボス部内に挿入される挿入部を有する第２の部品との組付構造であって、前記ボス部先端の切り口面は前記ボス部中心側に傾斜する傾斜面を有し、前記切り口面が高低に形成されるとともに、前記第２の部品が前記第１の部品に対して一方に偏った状態で前記挿入部を前記ボス部内に挿入しようとした際、前記挿入部の外周が前記ボス部の外周よりはみ出さないようにする規制部を前記第１の部品に設けたものである。
【００１４】
また、略円筒状または中空角状のボス部を有する第１の部品と、この第１の部品のボス部内に挿入される挿入部を有する第２の部品との組付構造であって、前記ボス部先端の切り口面は前記ボス部中心側に傾斜する傾斜面を有するとともに、前記第２の部品が前記第１の部品に対して一方に偏った状態で前記挿入部を前記ボス部内に挿入しようとした際、前記挿入部の外周が前記ボス部の外周よりはみ出さないようにする規制部を前記第１の部品に設けたものである。
【００１５】
【発明の実施の形態】
本発明を各実施形態に基づいて説明するが、従来例と同様に車両用の計器装置を形態とし、かつ従来例と同一もしくは相当箇所には同一符号を付して、その詳細説明は省略する。また、各実施形態においては第１の部品を操作軸、第２の部品を見返し板とする。
【００１６】
図１〜図６に本発明の第１実施形態を示す。操作軸１２は略円柱状の操作部１４と、タクトスイッチ１１を押す押圧部１５と、操作軸１２中程の操作部１４周囲に設けた有底略円筒状のボス部１６と、このボス部１６周囲より外側に突き出た２本の腕片１７と、腕片１７の下方に後述するケース１の係合部１８に係着する係止部１９とからなる。この係止部１９は左右方向に弾性変形可能に設けた係止片２０と、この係止片２０の先端に直角に突設した係止爪２１とからなる。ボス部１６先端の切り口面２７は均一の高さではなく、高低となっており（本実施形態の場合はなだらかなＶ字状）、高い箇所と低い箇所を曲線で結んだ形状となっている。さらに切り口面２７は図４に示す如く、ボス部１６中心側の角部にＲ状の面取り２８を施してある。また、図２に示す様に係止片２０を設けた方向と直交する方向には２本の腕片１７と、腕片１７の下方に上下方向に弾性変形可能な屈曲片２２が設けてあり、その先端はケース１に当接している。なお、切り口面２７は図５に示す様にボス部１６中心側に傾斜する傾斜面２９としても良い。また、ボス部１６は切り口が真ん円の円筒でなくとも近似形状なら良い。
【００１７】
ケース１には前記係止片２０と対応する位置に係合部１８が設けてあり、また、図２に示す様に屈曲片２２の先端側と対応するケース１箇所にはリブ２３を設けてリブ２３間で屈曲片２２先端および操作軸１２が左右方向に大きく動かないようにしてある。また、押圧部１５が挿通される孔２４の周囲には傾斜面を有する周壁２５を設けて、操作軸１２をケース１にセットする際に押圧部１５を孔２４に入れやすくしてある。なお、見返し板７裏側の挿通穴１３周囲には略円筒状の挿入部２６が設けてあり、この挿入部２６下端側は操作軸１２のボス部１６内に挿入されている。この様にすることによって、バルブ１０が点灯しても、その光が見返し板７に設けてある挿通穴１３から上方に漏れないようにある。
【００１８】
この様に構成した計器装置の組み付けは、従来例と同様に回路基板９にケース１を載置してケース１内に操作軸１２や計器２などを収納した後、見返し板７の挿通穴１３に操作軸１２の操作部１４を通して見返し板７を計器２の前面側に組み付ける。この時、ボス部１６が略円筒状で、かつ先端の切り口面２７が高低になっているために、操作軸１２が少し傾いたり位置ズレしてケース１に組み付けられていて、見返し板７の挿入部２６下端がボス部１６先端の高い側の切り口面２７に偏った状態で当接した場合、あるいは、操作軸１２が傾いたり位置ズレしていない場合でも見返し板７の挿入部２６下端がボス部１６先端の高い側の切り口面２７に偏った状態で当接しても、低い方へと、かつ切り口面２７に沿ってボス部１６の中心側へ寄るようにと移動して挿入部２６の下端側はボス部１６内に挿入される。この様に、ボス部１６の径を大きくして誘い込みを設けるなどしなくとも、ボス部１６先端の切り口面２７を高低にするのみで挿入部２６の下端側はボス部１６内に入りやすくなって、見返し板７の組付作業性が良くなる。
【００１９】
また、図４に示す様に、切り口面２７にはボス部１６中心側の角部に曲面形状の面取り２８を施してあるため、見返し板７の挿入部２６がボス部１６内に入りやすい。なお、図５に示す様に、切り口面２７をボス部１６中心側に傾斜する傾斜面２９とすると、見返し板７の挿入部２６はボス部１６内に一層入りやすくなる。この様に、切り口面２７に面取り２８を施したり、傾斜面２９を設けることによって、見返し板７の挿入部２６下端がボス部１６先端の低い側の切り口面２７に偏った状態で当接しても、挿入部２６の下端側はボス部１６内に入りやすくなって、見返し板７の組付作業性がより良くなる。
【００２０】
また、本実施形態の操作軸１２のボス部１６と見返し板７の挿入部２６との構成は、各図に示す様に略円筒状のボス部１６の中心に略円柱状の操作部１４が位置する。そして、操作部１４とボス部１６との間に略円筒状の挿入部２６が挿入されるようになっているが、各部品の部位は図６に示す様に、見返し板７が操作軸１２に対して一方に偏ったとしても、操作部１４がストッパーとなって挿入部２６の外周がボス部１６の外周よりはみ出すことがなく、挿入部２６の下端はボス部１６の切り口面２７上に当接するようになっている。すなわち、操作軸１２の操作部１４が挿入部２６に対する規制部となって挿入部２６の周囲がボス部１６の周囲より外側に動かないように構成されている。
【００２１】
この様に構成したことにより、見返し板７が最大限偏ったとしても、挿入部２６の下端は高低に形成された切り口面２７上、あるいはＲ状の面取り２８又は傾斜面２９が施された切り口面２７上に確実に当接するため、目視できない箇所であっても見返し板７の挿入部２６は操作軸１２のボス部１６内に入りやすくなって見返し板７の組付作業性がより良くなる。
【００２２】
図７は本発明の第２実施形態を示し、前記第１実施形態とは操作軸が異なるのみで他は同一のため、詳細説明は省略する。操作軸１２Ａのボス部１６Ａは略円筒状を成していて、ボス部１６Ａ先端の切り口面２７は均一の高さで、ボス部１６Ａ中心側に傾斜する傾斜面２８としてある。また、操作軸１２Ａのボス部１６Ａと見返し板７の挿入部２６との部位は、前記第１実施形態と同様になっており、見返し板７が操作軸１２Ａに対して一方に偏ったとしても、操作部１４がストッパーとなって挿入部２６の外周がボス部１６Ａの外周よりはみ出すことがなく、挿入部２６の下端はボス部１６Ａの切り口面２７上に当接するようになっている。すなわち、操作軸１２Ａの操作部１４が挿入部２６に対する規制部となって挿入部２６の周囲がボス部１６Ａの周囲より外側に動かないように構成されている。なお、ボス部１６Ａは円筒状に限らず角状でも良く、ボス部１６Ａ内に挿入される見返し板７の挿入部２６も円筒状でなくとも良い。
【００２３】
この様に構成したことにより、前記第１実施形態と同様に見返し板７が最大限偏ったとしても、挿入部２６の下端は切り口面２７上に確実に当接し、しかも切り口面２７が傾斜面２９となっているために、挿入部２６は傾斜面２９に沿ってボス部１６Ａ中心側に動きボス部１６Ａ内に挿入される。この様に、ボス部１６Ａの径を大きくして誘い込みを設けるなどしなくとも、ボス部１６Ａ先端の切り口面２７を中心側に傾斜する傾斜面２９とするのみで挿入部２６の下端側はボス部１６Ａ内に入りやすくなって、見返し板７の組付作業性がより良くなる。
【００２４】
なお、本発明は前記各実施形態に限定されるものではなく、透視板と見返し板あるいは見返し板とケースをそれぞれ組み付ける際に同様の構造としても良い。
【００２５】
【発明の効果】
請求項１に記載の効果としては、第１の部品と第２の部品を組み付ける際に、一方に偏った状態で組み付けが行われようとしても、第１の部品のボス部の径を大きくして誘い込みを設けることなく、ボス部先端の切り口面を高低にし、ボス部中心側の角部に面取りをすることにより、切り口面に偏った状態で当接した第２の部品の挿入部下端が低い方へと、かつ切り口面に沿ってボス部の中心側へ寄るようにと移動して、挿入部下端側はボス部内に入りやすくなって、部品の組付作業性が良くなる。また、第２の部品の挿入部下端が第１の部品のボス部先端の低い側の切り口面に偏った状態で当接しても、挿入部の下端側はボス部内に入りやすくなる。また、第１の部品と第２の部品を組み付ける際に、一方に最大限偏った状態で組み付けが行われようとしても、規制部により第２の部品の挿入部の外周が第１の部品のボス部の外周より外側にはみ出すことがなく挿入部下端が切り口面上に当接し、切り口面の高低、あるいは面取りによって挿入部の下端側はボス部内に入りやすくなる。
【００２６】
請求項２に記載の効果としては、第１の部品と第２の部品を組み付ける際に、一方に偏った状態で組み付けが行われようとしても、第１の部品のボス部の径を大きくして誘い込みを設けることなく、ボス部先端の切り口面を高低にし、ボス部中心側に傾斜する傾斜面とすることにより、切り口面に偏った状態で当接した第２の部品の挿入部下端が低い方へと、かつ切り口面に沿ってボス部の中心側へ寄るようにと移動して、挿入部下端側はボス部内に入りやすくなって、部品の組付作業性が良くなる。また、第２の部品の挿入部下端が第１の部品のボス部先端の低い側の切り口面に偏った状態で当接しても、挿入部の下端側はボス部内に入りやすくなる。また、第１の部品と第２の部品を組み付ける際に、一方に最大限偏った状態で組み付けが行われようとしても、規制部により第２の部品の挿入部の外周が第１の部品のボス部の外周より外側にはみ出すことがなく挿入部下端が切り口面上に当接し、切り口面の高低、あるいは傾斜面によって挿入部の下端側はボス部内に入りやすくなる。
【００２９】
請求項３に記載の効果としては、第１の部品と第２の部品を組み付ける際に、一方に最大限偏った状態で組み付けが行われようとしても、規制部により第２の部品の挿入部の外周が第１の部品のボス部の外周より外側にはみ出すことがなく挿入部下端が切り口面上に当接し、切り口面に設けた傾斜面によって挿入部の下端側はボス部内に入りやすくなって、部品の組付作業性がより良くなる。
【図面の簡単な説明】
【図１】本発明の第１実施形態を示す計器装置の部分断面図。
【図２】同実施形態を示し、図１と直交方向の計器装置の部分断面図。
【図３】同実施形態の操作軸を示す斜視図。
【図４】同実施形態の操作軸のボス部を示す部分断面図。
【図５】同実施形態の変形例を示す操作軸のボス部の部分断面図。
【図６】同実施形態の見返し板の組み付け状態を示す部分断面図。
【図７】本発明の第２実施形態を示す操作軸の部分断面図。
【図８】従来の計器装置を示す部分断面図。
【図９】従来の計器装置を示し、図８と直交方向の部分断面図。
【符号の説明】
７見返し板（第２の部品）
１２，１２Ａ操作軸（第１の部品）
１４操作部（規制部）
１６，１６Ａボス部
２６挿入部
２７切り口面
２８面取り
２９傾斜面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for assembling parts constituting, for example, an instrument device for a vehicle.
[0002]
[Prior art]
In general, as shown in FIG. 8, an instrument device for a vehicle includes a meter 2 such as a speedometer and a tachometer in a synthetic resin case 1 and an accumulator such as a so-called odometer and trip meter (illustrated) indicating the travel distance of the vehicle. Not stored). The meter 2 includes a meter body 3, a light guide plate 4 disposed in front of the meter body 3, a display plate 5 disposed in front of the light guide plate 4, and the operation of the meter body 3. A moving pointer 6 is provided. 7 is a facing plate that covers the gap between the meters 2 and the gap between the meter 2 and the case 1, and 8 is a see-through plate that covers the front opening side of the case 1. Reference numeral 9 denotes a circuit board that is electrically connected to the instrument 2 and is equipped with electronic components that drive the instrument 2, a bulb 10 as a light source that illuminates the display board 5 and the pointer 6, and the like, which will be described later. It also has.
[0003]
In such an instrument device, the accumulator is often used as an electronic display using liquid crystal, etc., and is used from a synthetic resin for operations such as switching the display of the accumulator and resetting the distance display to zero. The operation shaft 12 is provided. The distal end side of the operation shaft 12 protrudes upward from insertion holes 13 and 13A provided in the facing plate 7 and the see-through plate 8. The operation can be performed by pressing the tact switch 11 provided on the circuit board 9 with the operation shaft 12. Here, FIG. 9 shows a cross section in a direction orthogonal to the operation shaft 12 shown in FIG.
[0004]
The operation shaft 12 includes a columnar operation portion 14, a pressing portion 15 that presses the tact switch 11, a bottomed cylindrical boss portion 16 provided around the operation portion 14 in the middle of the operation shaft 12, and the periphery of the boss portion 16. It consists of two arm pieces 17 protruding outward and a locking portion 19 that is engaged with an engaging portion 18 of the case 1 described below below the arm piece 17. The locking portion 19 includes a locking piece 20 provided so as to be elastically deformable in the left-right direction, and a locking claw 21 protruding at a right angle from the tip of the locking piece 20. Further, as shown in FIG. 9, two arm pieces 17 are provided in a direction orthogonal to the direction in which the locking pieces 20 are provided, and a bent piece 22 that is elastically deformable in the vertical direction is provided below the arm pieces 17. The tip is in contact with the case 1.
[0005]
The case 1 is provided with an engaging portion 18 at a position corresponding to the locking piece 20, and a rib 23 is provided at one place corresponding to the distal end side of the bent piece 22 as shown in FIG. The distal end of the bent piece 22 and the operation shaft 12 are prevented from moving greatly in the left-right direction between the ribs 23. A peripheral wall 25 having an inclined surface is provided around the hole 24 through which the pressing portion 15 is inserted, so that the pressing portion 15 can be easily inserted into the hole 24 when the operating shaft 12 is set in the case 1. A cylindrical insertion portion 26 is provided around the insertion hole 13 on the back side of the facing plate 7, and the lower end side of the insertion portion 26 is inserted into the boss portion 16 of the operation shaft 12. By doing so, even when the bulb 10 is turned on, the light does not leak upward from the insertion hole 13 provided in the turn-back plate 7.
[0006]
The assembly of the instrument device configured in this way is performed by placing the case 1 on the circuit board 9 and storing the operation shaft 12 and the instrument 2 in the case 1, and then inserting the operation shaft 12 into the insertion hole 13 of the facing plate 7. The facing plate 7 is assembled to the front side of the meter 2 through the operation unit 14. Similarly, the see-through plate 8 is assembled to the front opening side of the case 1. In addition, the dimensional relationship between the insertion holes 13 and 13A provided in the facing plate 7 and the see-through plate 8 and the operation portion 14 is not that the operation shaft 12 is fixed to the case 1 or that is positioned reliably. However, there is a possibility that it may be tilted or misaligned, and the gap between the operation unit 14 and the turn-back plate 7 or the see-through plate 8 takes into account these dimensions (in this example, the circumference is 1.5 to 2 mm). It has become. Further, when the tact switch 11 is pressed, the bending piece 22 is bent by pushing the operation portion 14 of the operation shaft 12 protruding forward from the insertion hole 13A of the see-through plate 8 as described above. The operating shaft 12 moves downward, and the pressing unit 15 pushes the tact switch 11 to reset the trip meter distance display to zero. Thereafter, the operation shaft 12 returns to the original position due to the elasticity of the bent piece 22.
[0007]
[Problems to be solved by the invention]
However, when assembling the facing plate 7, as described above, when the operating shaft 12 is tilted or misaligned and assembled to the case 1, the insertion portion of the facing plate 7 with respect to the position of the boss portion 16 of the operating shaft 12. 26 is about to be inserted while being biased to one side. Then, the lower end of the insertion portion 26 comes into contact with the tip of the boss portion 16, and the insertion portion 26 may not smoothly enter the boss portion 16. Alternatively, even when the operation shaft 12 is not tilted or misaligned, if the insertion portion 26 of the facing plate 7 is inserted in a state of being biased to one side, the insertion portion 26 similarly does not smoothly enter the boss portion 16. Sometimes. Since the boss portion 16 of the operation shaft 12 and the insertion portion 26 of the facing plate 7 are not visible when the facing plate 7 is assembled, this tendency is stronger.
[0008]
As a method for solving such a situation, even if there is a radial displacement between the operation shaft 12 and the insertion portion 26 of the facing plate 7, the insertion portion 26 provided on the facing plate 7 is used as the operating shaft. It is sufficient to provide a large lead in the boss portion 16 so that the boss portion 16 can be smoothly inserted into the boss portion 16, but it is necessary to increase the size of the boss portion 16 in the radial direction. May affect lighting.
[0009]
The present invention has been made in view of these points, and an object of the present invention is to provide a part assembly structure having a compact shape and good assembly workability.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is an assembly structure of a first part having a substantially cylindrical boss part and a second part having an insertion part inserted into the boss part of the first part. The cut surface at the tip of the boss portion has a chamfer at a corner on the center side of the boss portion, the cut surface is formed to be high and low, and the second component is relative to the first component. The first component is provided with a restricting portion that prevents the outer periphery of the insertion portion from protruding beyond the outer periphery of the boss portion when the insertion portion is to be inserted into the boss portion in a biased state. It is.
[0011]
The first component having a substantially cylindrical boss portion and the second component having an insertion portion inserted into the boss portion of the first component, The cut surface has an inclined surface inclined toward the center side of the boss portion, the cut surface is formed at a height, and the insertion is performed in a state where the second part is biased to one side with respect to the first part. When the portion is to be inserted into the boss portion, the first component is provided with a restricting portion that prevents the outer periphery of the insertion portion from protruding beyond the outer periphery of the boss portion .
[0014]
The first component having a substantially cylindrical or hollow square boss portion and the second component having an insertion portion inserted into the boss portion of the first component, with cut surface of the boss tip has an inclined surface which is inclined to the boss center side, inserting the insertion portion into the boss portion in a state in which the second component is lopsided the first part The first part is provided with a restricting portion that prevents the outer periphery of the insertion portion from protruding beyond the outer periphery of the boss portion when attempting to do so .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described based on each embodiment. However, as in the conventional example, a vehicle instrument device is used, and the same or corresponding parts as in the conventional example are denoted by the same reference numerals, and detailed description thereof is omitted. . In each embodiment, the first component is an operation shaft, and the second component is a facing plate.
[0016]
1 to 6 show a first embodiment of the present invention. The operation shaft 12 includes a substantially cylindrical operation portion 14, a pressing portion 15 that presses the tact switch 11, a bottomed substantially cylindrical boss portion 16 provided around the operation portion 14 in the middle of the operation shaft 12, and the boss portion. 16 comprises two arm pieces 17 projecting outward from the periphery, and a locking portion 19 engaged with an engaging portion 18 of the case 1 described below below the arm piece 17. The locking portion 19 includes a locking piece 20 provided so as to be elastically deformable in the left-right direction, and a locking claw 21 protruding at a right angle from the tip of the locking piece 20. The cut surface 27 at the tip of the boss portion 16 is not a uniform height but a height (in the case of this embodiment, a gentle V shape), and has a shape in which a high portion and a low portion are connected by a curve. . Further, as shown in FIG. 4, the cut surface 27 is provided with an R-shaped chamfer 28 at a corner on the center side of the boss portion 16. As shown in FIG. 2, two arm pieces 17 are provided in a direction orthogonal to the direction in which the locking pieces 20 are provided, and a bent piece 22 that is elastically deformable in the vertical direction is provided below the arm pieces 17. The tip is in contact with the case 1. The cut surface 27 may be an inclined surface 29 that is inclined toward the center of the boss portion 16 as shown in FIG. Further, the boss portion 16 may be an approximate shape even if it is not a round circular cylinder.
[0017]
The case 1 is provided with an engaging portion 18 at a position corresponding to the locking piece 20, and a rib 23 is provided at one case corresponding to the distal end side of the bent piece 22 as shown in FIG. 2. The distal end of the bent piece 22 and the operation shaft 12 are prevented from moving greatly in the left-right direction between the ribs 23. A peripheral wall 25 having an inclined surface is provided around the hole 24 through which the pressing portion 15 is inserted, so that the pressing portion 15 can be easily inserted into the hole 24 when the operating shaft 12 is set in the case 1. A substantially cylindrical insertion portion 26 is provided around the insertion hole 13 on the back side of the facing plate 7, and the lower end side of the insertion portion 26 is inserted into the boss portion 16 of the operation shaft 12. By doing so, even when the bulb 10 is turned on, the light does not leak upward from the insertion hole 13 provided in the turn-back plate 7.
[0018]
The instrument device constructed in this manner is assembled by placing the case 1 on the circuit board 9 and storing the operation shaft 12 and the instrument 2 in the case 1 in the same manner as in the conventional example, and then inserting the insertion hole 13 in the turn-back plate 7. Then, the facing plate 7 is assembled to the front side of the instrument 2 through the operation portion 14 of the operation shaft 12. At this time, since the boss portion 16 has a substantially cylindrical shape and the cut end surface 27 at the tip is raised and lowered, the operation shaft 12 is slightly tilted or misaligned and assembled to the case 1. Even when the lower end of the insertion portion 26 is in contact with the cut surface 27 on the higher side of the tip of the boss portion 16 in a biased state, or even when the operation shaft 12 is not inclined or misaligned, the lower end of the insertion portion 26 of the facing plate 7 is Even when the boss portion 16 is in contact with the cut end surface 27 on the higher side, the insertion portion 26 moves toward the lower side and along the cut end surface 27 toward the center of the boss portion 16. Is inserted into the boss portion 16. In this manner, the lower end side of the insertion portion 26 can easily enter the boss portion 16 only by raising and lowering the cut surface 27 at the tip of the boss portion 16 without increasing the diameter of the boss portion 16 and providing a guide. Thus, the workability of assembling the facing plate 7 is improved.
[0019]
Also, as shown in FIG. 4, the cut surface 27 is provided with a curved chamfer 28 at the corner on the center side of the boss portion 16, so that the insertion portion 26 of the facing plate 7 easily enters the boss portion 16. As shown in FIG. 5, when the cut surface 27 is an inclined surface 29 that is inclined toward the center side of the boss portion 16, the insertion portion 26 of the facing plate 7 can more easily enter the boss portion 16. In this way, by chamfering the cut surface 27 or providing the inclined surface 29, the lower end of the insertion portion 26 of the facing plate 7 is in contact with the cut surface 27 on the lower side of the tip of the boss portion 16 in a biased state. In addition, the lower end side of the insertion portion 26 can easily enter the boss portion 16, and the workability of assembling the facing plate 7 is improved.
[0020]
Further, the configuration of the boss portion 16 of the operation shaft 12 and the insertion portion 26 of the facing plate 7 according to the present embodiment is such that the substantially cylindrical operation portion 14 is located at the center of the substantially cylindrical boss portion 16 as shown in each drawing. To position. Then, a substantially cylindrical insertion portion 26 is inserted between the operation portion 14 and the boss portion 16, and the part of each component is arranged such that the facing plate 7 is connected to the operation shaft 12 as shown in FIG. 6. However, the outer periphery of the insertion portion 26 does not protrude from the outer periphery of the boss portion 16, and the lower end of the insertion portion 26 is on the cut surface 27 of the boss portion 16. It comes to contact. That is, the operation portion 14 of the operation shaft 12 is a restriction portion for the insertion portion 26 so that the periphery of the insertion portion 26 does not move outward from the periphery of the boss portion 16.
[0021]
With this configuration, even if the facing plate 7 is biased to the maximum extent, the lower end of the insertion portion 26 is on the cut surface 27 formed with a height, or a cut surface provided with an R-shaped chamfer 28 or an inclined surface 29. Since it abuts reliably on the surface 27, the insertion portion 26 of the facing plate 7 can easily enter the boss portion 16 of the operating shaft 12 even if it is not visible, and the workability of assembling the facing plate 7 is improved. .
[0022]
FIG. 7 shows a second embodiment of the present invention, which is the same as the first embodiment except that the operation axis is different, and the detailed description is omitted. The boss portion 16A of the operation shaft 12A has a substantially cylindrical shape, and the cut surface 27 at the tip of the boss portion 16A has a uniform height as an inclined surface 28 inclined toward the center side of the boss portion 16A. Further, the parts of the boss portion 16A of the operation shaft 12A and the insertion portion 26 of the facing plate 7 are the same as in the first embodiment, and even if the facing plate 7 is biased to one side with respect to the operating shaft 12A. The operation portion 14 serves as a stopper, and the outer periphery of the insertion portion 26 does not protrude from the outer periphery of the boss portion 16A, and the lower end of the insertion portion 26 comes into contact with the cut surface 27 of the boss portion 16A. That is, the operation portion 14 of the operation shaft 12A is configured as a restriction portion with respect to the insertion portion 26 so that the periphery of the insertion portion 26 does not move outward from the periphery of the boss portion 16A. The boss portion 16A is not limited to a cylindrical shape, and may be a square shape, and the insertion portion 26 of the turn-back plate 7 inserted into the boss portion 16A may not be cylindrical.
[0023]
With this configuration, even if the facing plate 7 is maximally biased as in the first embodiment, the lower end of the insertion portion 26 is securely abutted on the cut surface 27, and the cut surface 27 is an inclined surface. Therefore, the insertion portion 26 moves along the inclined surface 29 toward the center of the boss portion 16A and is inserted into the boss portion 16A. In this way, even if the diameter of the boss portion 16A is not increased and a guide is not provided, the cut end surface 27 at the tip of the boss portion 16A is merely an inclined surface 29 inclined toward the center, and the lower end side of the insertion portion 26 is the boss. It becomes easier to enter the portion 16A, and the workability of assembling the facing plate 7 is improved.
[0024]
The present invention is not limited to the above-described embodiments, and a similar structure may be used when assembling the see-through plate and the facing plate or the facing plate and the case, respectively.
[0025]
【The invention's effect】
According to the first aspect of the present invention, when the first part and the second part are assembled, the diameter of the boss portion of the first part is increased even if the first part and the second part are assembled in a biased state. The lower end of the insertion part of the second part that is in contact with the cut surface by making the cut surface at the tip of the boss part high and low, and chamfering the corner part on the center side of the boss part The lower end side of the insertion portion easily moves into the boss portion and the workability of assembling the parts is improved. Further, even if the lower end of the insertion part of the second part abuts against the cut surface on the lower side of the tip of the boss part of the first part, the lower end side of the insertion part easily enters the boss part. Further, when the first part and the second part are assembled, the outer periphery of the insertion part of the second part is placed on the first part by the restricting part even if the assembling is performed in a state of being biased to the maximum. The lower end of the insertion portion does not protrude beyond the outer periphery of the boss portion, but the lower end side of the insertion portion easily enters the boss portion due to the height of the cut surface or chamfering.
[0026]
According to the second aspect of the present invention, when the first component and the second component are assembled, the diameter of the boss portion of the first component is increased even if the first component and the second component are assembled in a biased state. The lower end of the insertion part of the second part that is in contact with the cut surface in a state of being inclined by raising and lowering the cut surface at the tip of the boss and making it inclined toward the center of the boss The lower end side of the insertion portion easily moves into the boss portion and the workability of assembling the parts is improved. Further, even if the lower end of the insertion part of the second part abuts against the cut surface on the lower side of the tip of the boss part of the first part, the lower end side of the insertion part easily enters the boss part. Further, when the first part and the second part are assembled, the outer periphery of the insertion part of the second part is placed on the first part by the restricting part even if the assembling is performed in a state of being biased to the maximum. The lower end of the insertion portion does not protrude outward from the outer periphery of the boss portion, and the lower end side of the insertion portion easily enters the boss portion due to the height of the cut end surface or the inclined surface.
[0029]
According to the third aspect of the present invention, when the first component and the second component are assembled, even if the assembly is performed in a state where the first component and the second component are biased to the maximum, the insertion portion of the second component by the restricting portion The outer periphery of the insertion part does not protrude beyond the outer periphery of the boss part of the first part, the lower end of the insertion part abuts on the cut surface, and the lower end side of the insertion part easily enters the boss part by the inclined surface provided on the cut surface. As a result, the assembly workability of the parts is improved.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of an instrument device showing a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of the instrument device in the direction orthogonal to FIG. 1 showing the embodiment.
FIG. 3 is a perspective view showing an operation shaft of the embodiment.
FIG. 4 is a partial cross-sectional view showing a boss portion of an operation shaft according to the embodiment.
FIG. 5 is a partial cross-sectional view of a boss portion of an operation shaft showing a modification of the embodiment.
FIG. 6 is a partial cross-sectional view showing an assembled state of the facing plate according to the embodiment.
FIG. 7 is a partial cross-sectional view of an operating shaft showing a second embodiment of the present invention.
FIG. 8 is a partial cross-sectional view showing a conventional instrument device.
FIG. 9 is a partial cross-sectional view in a direction orthogonal to FIG. 8, showing a conventional instrument device.
[Explanation of symbols]
7 Flip plate (second part)
12, 12A Operation shaft (first part)
14 Operation part (Regulation part)
16, 16A Boss portion 26 Insertion portion 27 Cut surface 28 Chamfer 29 Inclined surface

Claims

An assembly structure of a first part having a substantially cylindrical boss part and a second part having an insertion part inserted into the boss part of the first part, the cut surface of the tip of the boss part Has a chamfer at the corner on the center side of the boss portion, the cut surface is formed at a height, and the insertion portion is arranged in a state where the second component is biased to one side with respect to the first component. The component assembly structure according to claim 1, wherein a restriction portion is provided on the first component so that an outer periphery of the insertion portion does not protrude from an outer periphery of the boss portion when trying to insert the boss portion into the boss portion .

A first structure having a substantially cylindrical boss portion and an assembly structure of a second component having an insertion portion inserted into the boss portion of the first component, and a cut surface at the tip of the boss portion Has an inclined surface inclined toward the center side of the boss portion, the cut surface is formed at a height, and the insertion portion is arranged in a state where the second component is biased to one side with respect to the first component. The component assembly structure according to claim 1, wherein a restriction portion is provided on the first component so that an outer periphery of the insertion portion does not protrude from an outer periphery of the boss portion when trying to insert into the boss portion.

An assembly structure of a first part having a substantially cylindrical or hollow square boss part and a second part having an insertion part inserted into the boss part of the first part, wherein the boss part The cut surface at the tip has an inclined surface inclined toward the boss portion center side, and the insertion portion is to be inserted into the boss portion in a state where the second component is biased to one side with respect to the first component. In this case, the component assembly structure is characterized in that the first component is provided with a restricting portion that prevents the outer periphery of the insertion portion from protruding from the outer periphery of the boss portion.