JP3473361B2 - Instrument terminal structure - Google Patents

Instrument terminal structure

Info

Publication number
JP3473361B2
JP3473361B2 JP34362897A JP34362897A JP3473361B2 JP 3473361 B2 JP3473361 B2 JP 3473361B2 JP 34362897 A JP34362897 A JP 34362897A JP 34362897 A JP34362897 A JP 34362897A JP 3473361 B2 JP3473361 B2 JP 3473361B2
Authority
JP
Japan
Prior art keywords
piece
terminal
case
open
spring fitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP34362897A
Other languages
Japanese (ja)
Other versions
JPH11160353A (en
Inventor
伝三郎 小林
則夫 広田
敏昭 浅見
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RKC INSTRUMENT Inc
Original Assignee
RKC INSTRUMENT Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RKC INSTRUMENT Inc filed Critical RKC INSTRUMENT Inc
Priority to JP34362897A priority Critical patent/JP3473361B2/en
Publication of JPH11160353A publication Critical patent/JPH11160353A/en
Application granted granted Critical
Publication of JP3473361B2 publication Critical patent/JP3473361B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Multi-Conductor Connections (AREA)

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は計器類の端子構造に
係り、特に温度測定計器その他一般的な測定計器類にお
いてそのケースに外部接続用の端子ばね金具を配置して
なる計器類の端子構造の改良に関する。 【0002】 【従来の技術】従来、この種の計器類の端子構造として
は、種々の構成が提供されているが、その一例として本
出願人が既に実開平4−45922号(実願平2−87
524号)に示すような構成を提案した。この構成を概
略的に示すならば、例えば図9に示すように、薄い導電
板材をコ字状に形成した端子ばね金具1の内側に、これ
より厚手の導電板材をやはりコ字状に形成したナット部
材3を挟持させ、端子ばね金具1の対向する開放片1
a、1bから切り起した係止片5a、5bをケース7の
引掛け部7a、7bに引掛けるようにしてナット部材付
き端子ばね金具1をケース7に保持させ、端子ねじ9を
端子ばね金具1を介してナット部材3のねじ部11にね
じ込み、開放片1bの先端部を湾曲させて接触片13を
形成していた。 【0003】そして、ケース7に設けた挿入溝15に沿
って回路基板17を挿入すると、この回路基板17に設
けた接続電極(図示せず)に接触片13が弾性的に接触
し、端子ねじ9の締付けによって端子ばね金具1に接続
された外部リード(図示せず)が回路基板17と電気的
に接続されるようになっていた。しかも、端子ばね金具
1にナット部材3がワンタッチで簡単に挟持可能となっ
て端子ばね金具1とナット部材3の組立てが容易である
うえ、端子ねじ9のねじ込みも容易となり、この点から
も組立てが簡単であった。 【0004】 【発明が解決しようとする課題】しかしながら、上述し
た構成の計器類の端子構造は、組立てが簡単であるとは
いえ、端子ねじ9を確実にねじ込み保持するために端子
ばね金具1より厚手のナット部材3が必要であり、より
一層の構成部品のコストダウンを図って安価な製品を提
供するには改善すべき余地がある。もっとも、端子ばね
金具1およびナット部材3を厚手の導電材料で一体的に
形成すればコストダウンを図れるように考えられるが、
ケース7に収納した回路基板17の接続電極との間で確
実かつ容易に端子ばね金具1又はナット部材3を接触さ
せる必要性から、それらを薄くして弾力性を確保する必
要があるといった相反する要求があり、実際には困難で
あった。 【0005】本発明はそのような状況の下になされたも
ので、構成部品のコストダウンを図ることが容易で、収
納する回路基板と確実かつ容易に接触させることができ
る計器類の端子構造の提供を目的とする。 【0006】 【課題を解決するための手段】このような課題を解決す
るために本発明の計器類の端子構造は、計器類のケース
に外部へ向けて取付けられるとともにそのケース内部の
回路基板に接続される端子ばね金具と、この端子ばね金
具の裏面側に配置されたナット部材と、この端子ばね金
具にケースの外部から挿通されてナット部材にねじ込ま
れる端子ねじとを具備し、その端子ねじの挿通される中
間片の両端部から互いに対向してケース内側へ延びる第
1および第2の開放片を設けてその端子ばね金具を概略
コ字状に形成し、それら第1および第2の開放片にその
中間片側へ向け外側へ各々切り起こした係止片を設け、
その第1の開放片にはその回路基板に電気的に圧接する
接触片を設け、上記ナット部材にはその第1の開放片の
内側に当接して上記係止片の付け根近傍までL字形に一
体的に延びる屈曲片を設けて構成されている。 【0007】そして、本発明は、上記第1および第2の
開放片の各係止片を上記ケースに引っ掛けるように係止
させ、その第1の開放片をケースと屈曲片間で保持さ
せ、その第2の開放片を第2の開放片の内側に当接する
ようそのケースに設けた当接片とそのケースとの間で保
持させて上記端子ばね金具をケースに保持させている。 【0008】 【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。図1は、本発明に係る計器類の端
子構造の実施の形態を示す概略断面図である。図1にお
いて、絶縁性合成樹脂を箱型に成形してなるケース19
の後端部側に設けた保持窓21には、接続端子としての
端子ばね金具23がはまってケース19に保持されてい
る。 【0009】端子ばね金具23は、図2〜図5にも示す
ように、りん青銅、ベリリウム銅合金、黄銅、洋白等の
ように加工が容易で弾性(ばね性)に富む導電性帯材料
から打抜いて概略コ字状に屈曲成形されてなり、中間片
23aの両端から対向して延びる第1および第2の開放
片23b、23cを有し、それら第1および第2の開放
片23b、23cをケース19に当接するようにして保
持窓21からはめ込まれている。すなわち、端子ばね金
具23は、中間片23aの一端(図1中上側)から第1
の開放片23bが鈍角状に屈曲して延びる一方、他端
(図1中下側)から第2の開放片23cが鋭角状に屈曲
して延びており、中間片23aが第1および第2の開放
片23bや23c、更にケース19の後端面に対して斜
に位置するとともに第2の開放片23cに斜めに面する
ように形成されている。 【0010】第1および第2の開放片23b、23cか
らは、中間片23a側へ向けた係止片25a、25bが
外側へ切り起こされており、これら係止片25a、25
bがケース19に設けた引掛け部27a、27bに引掛
けるように係止され、端子ばね金具23がケース19か
ら抜け難くなっている。なお、第1および第2の開放片
23b、23cにおいて、係止片25a、25bを形成
するU字形の切り溝周囲にはリブニング26が形成さ
れ、薄板からなる第1および第2の開放片23b、23
cが補強されるとともに、ケース19から抜け難くなっ
ている。 【0011】端子ばね金具23の第1の開放片23bは
途中から第2の開放片23c側へU字状に湾曲成形され
た接触片23dとなっており、この接触片23dの先端
が更に内側へ湾曲している。この接触片23dの先端
は、後述するように回路基板29の図示しない接続電極
に弾性的に接続されるものである。接触片23dは、図
2から分るように、ばね性を高めるために2条の弾性片
を途中で連結した形状になっているが、形状はこれに限
定されない。 【0012】端子ばね金具23の第2の開放片23c
は、保持窓21付近でケース19内側へ圧接されてい
る。端子ばね金具23の中間片23aの内側には、端子
ばね金具23より厚い導電板からなり中間片23aとぼ
ぼ同形状又は若干小さい板状のナット部材31が重ねら
れ、図示しない適当な手段によって保持されている。こ
のナット部材31の中央部には、図3に示すように、ね
じ孔31aが貫通形成されており、端子ばね金具23の
中間片23a中央部に形成された貫通孔23eから挿入
された導電性の座金付きの端子ねじ33が第2の開放片
23bに向けてねじ孔31aに斜にねじ込まれている。
図中符号33aは端子ねじ33に形成された座金であ
る。 【0013】端子ねじ33は、ねじ孔31aに最も奥ま
でねじ込まれた場合でも、ねじ先端が第1、第2の開放
片23b、23c、回路基板29又は後述する当接片3
7に当接しないような寸法および位置関係でねじ込まれ
ている。なお、端子ねじ33による安定かつ強い締付け
状態を確保する観点から、ナット部材31の中央部を若
干内側に突出させてねじ孔31aを形成すると良い。 【0014】ナット部材31における第1の開放片23
b側の縁からは、鈍角状かつL字形に屈曲した屈曲片3
1bが一体的に形成されており、第1の開放片23bの
内側に当接して係止片25aの付け根近傍まで延びてい
る。そのため、第1の開放片23bは、ケース19と屈
曲片31bによって保持された状態となっている。 【0015】ケース19における保持窓21に臨む保持
壁35には、端子ばね金具23の第2の開放片23cの
内側(第1の開放片23bとの対面側)に当接する当接
片37が一体的に突設形成されており、第2の開放片2
3cが当接片37と係止片25bを介したケース19と
の間で保持されている。ケース19の保持壁35には、
回路基板29が挿入される挿入溝39が形成されてい
る。 【0016】回路基板29は、その片面側(図1中上
側)において端部に寄った位置に、端子ばね金具23の
接触片23dが接続される図示しない接続電極その他の
電極を有している。回路基板29には、測定計器が例え
ば温度調節計や温度指示計である場合、熱電対等からの
温度測定信号に基づき測定温度を算出する温度測定回
路、温度調節計や温度指示計等の本体回路、温度測定信
号を補償する温度補償回路等が形成されているが、本発
明の主要部ではないので図示を省略する。 【0017】このような計器類の端子構造では、回路基
板29の端部を保持壁35の挿入溝39にはめるように
挿入すると、端子ばね金具23の接触片23dが回路基
板29の接続電極に弾性的かつ電気的に接続される。そ
のため、端子ねじ33を緩めて外部リード線や外部端子
板(図示せず)を接続してそれを締めれば、それら外部
リード線や外部端子板からの電気信号を端子ばね金具2
3を介して回路基板29に取込める。また、回路基板2
9を引抜けば、容易に保持壁35や端子ばね金具23か
ら外せる。 【0018】このような構成の計器類の端子構造は、ケ
ース19にはめる端子ばね金具23を、この中間片23
aの両端部から互いに対向してケース内側方向へ延びる
第1および第2の開放片23b、23cを設けて概略コ
字状に形成し、その第1の開放片23bの途中から先端
部にかけて回路基板29に弾性的かつ電気的に圧接可能
な接触片23dとし、その端子ばね金具23の裏面側に
ナット部材31を配置してケース19の外部から端子ね
じ33をナット部材31にねじ込み、更に、そのナット
部材31にはその第1の開放片23bの内側に当接して
延びる屈曲片31bを設けてL字形に形成する一方、第
2の開放片23cをケース19に形成した当接片37に
当接させたので、ナット部材31を単にL字形に屈曲形
成すれば良いし材料の消費量も少なく、ナット部材31
の製造コストが極めて安価となり、全体の製品コストを
大きく下げることができる。 【0019】これに比べて、従来の図9に示すようなコ
字状のナット部材3では、導電板を2箇所で屈曲加工し
て形成される場合が多くて製造コストを下げ難く、コス
トダウンの障害となっていた。しかも、上述した構成で
は、回路基板29に弾性的に接続する第1の開放片23
bが、ナット部材31の屈曲片31bに当接されてケー
ス19との間で確実かつ良好に支持されるから、回路基
板29の抜き差しに伴う変形変位に対しても機械強度を
良好に保つことができるし、回路基板29との弾性圧力
も良好となる利点がある。 【0020】さらに、第2の開放片23cについても当
接片37とケース19間で支持可能となり、端子ねじ金
具23を保持する機械的強度を良好に保つことができ
【0021】もっとも、隣接する端子ねじ金具23間に
はケース19の面に沿った電気的な一定距離(沿面距
離)が必要とされるが、この要求される沿面距離は使用
する材料の電気的絶縁性の良否で異なる。隣接する端子
ねじ金具23間において、ケース19を電気的絶縁性の
悪い材料で形成する場合、必要とする沿面距離を確保で
きない場合がある。なお、その沿面距離は、例えば図6
において上下方向に隣合うように端子ばね金具23(下
側の端子ばね金具23は図示されていない。)が配置さ
れている場合、一方の端子ばね金具23から、図8の保
持壁35、挿入溝39および隣合う端子ばね金具23側
の保持壁35を介したケース19内面に沿った電気的距
離である。 【0022】この点、ケース19に当接片37を設ける
ことにより、一方の端子ばね金具23から、保持壁3
5、挿入溝39および隣合う端子ばね金具23側の保持
壁35を介したケース19内面に沿った電気的距離が実
質的に長くなり、絶縁性の劣る樹脂材料でケース19を
形成しても、必要とされる沿面距離を確保できる。すな
わち、ケース材料の絶縁性に影響されることなく、要求
される沿面距離を確保できる。 【0023】そして、端子ばね金具23の中間片23a
を第1の開放片23bに対して斜めに、更にケース19
の後端面に対しても斜めに配置可能であるから、図6に
示すように、端子ばね金具23を計器類のケース19の
後端部側に複数個配列しても、外部リード線や外部端子
板が斜方向から端子ばね金具23に取付け可能となり、
隣合う端子ばね金具23間の間隔が狭くても接続できる
うえ、間隔を詰めて複数の端子ばね金具23をケース1
9に配列可能である。そのうえ、端子ばね金具23がは
めこまれる保持窓21のスペースを小さくできるため、
ケース19への端子の配置効率が更に向上し、小型の計
器類でもより多くの端子を配列可能となり、計器類の機
能を増大させることができる。 【0024】ところで、上述した本発明に係る端子構造
では、図7に示すように、端子ばね金具23から延びる
第1の開放片23bを中間片23aから鋭角状に、第2
の開放片23cを鈍角状に屈曲させる構成も可能であ
り、ナット部材31から屈曲させる屈曲片31bも鋭角
状に屈曲させて第1の開放片23bに当接するように延
設することが可能である。その他の構成は図1と同様で
あるので、説明を省略するが、図7は図1に比べて第
1、第2の開放片23b、23cを上下逆に図示してい
る。 【0025】このような図1および図7に示す構成の端
子構造は、例えば図8に示すように配置することが可能
であり、端子ばね金具23の配列が省力スペースで済む
ので、多数の端子ばね金具23を有効に配置することが
できるため、回路基板29の増設が容易となり、種々の
オプション機能要求に対応できる。さらに、回路基板2
9間の間隔を広くとれるので、収容部品の配置、大きさ
等に制約を受け難い利点がある。 【0026】 【発明の効果】以上説明したように本発明の計器類の端
子構造は、中間片とこの両端部から互いに対向して延び
る第1および第2の開放片とを有するコ字状の端子ばね
金具を計器類のケースに外部へ向けて取付け、それら第
1および第2の開放片にその中間片側へ向け外側へ各々
切り起こした係止片を設け、この端子ばね金具の裏面側
にナット部材を配置し、この端子ばね金具に外部から端
子ねじをナット部材にねじ込み、その第1の開放片の接
触片をケース内の回路基板に電気的に圧接させるととも
に、そのナット部材にはその第1の開放片の内側に当接
して上記係止片の付け根近傍までL字形に一体的に延び
る屈曲片を設け、それら第1および第2の開放片の各係
止片を上記ケースに引っ掛けるように係止させ、その第
1の開放片をケースと屈曲片間で保持させ、その第2の
開放片を第2の開放片の内側に当接するようそのケース
に設けた当接片とそのケースとの間で保持させて上記端
子ばね金具をケースに保持させたから、ナット部材の製
造コストが極めて安価となり、全体の製品コストを大き
く下げることができるし、収納する回路基板を確実かつ
容易に接触できる。しかも、第1の開放片がナット部材
の屈曲片に当接されてケースとの間で確実かつ良好に支
持され、回路基板の抜き差しに伴う変形変位に対しても
機械強度を良好に保つことができる。さらに、第2の開
放片も当接片とケース間で確実に支持され、端子ねじ金
具の保持強度を良好に保つことができる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal structure of instruments, and particularly to a terminal spring fitting for external connection to a case of a temperature measuring instrument or other general measuring instruments. The present invention relates to an improvement in the terminal structure of instruments and the like having the above arrangement. 2. Description of the Related Art Conventionally, various configurations have been provided as a terminal structure of instruments of this type, and as an example, the present applicant has already disclosed Japanese Utility Model Application Laid-Open No. 4-45922 (Japanese Utility Model Application No. -87
No. 524) has been proposed. If this structure is schematically shown, for example, as shown in FIG. 9, a thicker conductive plate material is also formed in a U shape inside a terminal spring fitting 1 in which a thin conductive plate material is formed in a U shape. Nut member 3 is clamped, and opposite open pieces 1 of terminal spring fitting 1
The terminal pieces 1 with nut members are held by the case 7 so that the locking pieces 5a and 5b cut and raised from the a and 1b are hooked on the hooks 7a and 7b of the case 7, and the terminal screws 9 are connected to the terminal spring pieces. The contact piece 13 is formed by screwing into the threaded portion 11 of the nut member 3 via 1 and bending the distal end of the open piece 1b. When the circuit board 17 is inserted along the insertion groove 15 provided in the case 7, the contact piece 13 elastically contacts a connection electrode (not shown) provided on the circuit board 17, and a terminal screw is provided. The external leads (not shown) connected to the terminal spring fittings 1 were electrically connected to the circuit board 17 by the tightening of No. 9. In addition, the nut member 3 can be easily clamped to the terminal spring fitting 1 with a single touch, so that the terminal spring fitting 1 and the nut member 3 can be easily assembled, and the terminal screws 9 can be easily screwed in. In this regard, assembling is also possible. Was easy. However, although the terminal structure of the instrument having the above-described structure is easy to assemble, the terminal spring fitting 1 is used to securely screw and hold the terminal screw 9. Since the thick nut member 3 is required, there is room for improvement in order to further reduce the cost of components and provide an inexpensive product. However, if the terminal spring fitting 1 and the nut member 3 are integrally formed of a thick conductive material, cost reduction can be achieved.
The necessity of reliably and easily contacting the terminal spring fitting 1 or the nut member 3 with the connection electrode of the circuit board 17 housed in the case 7 is contradictory in that it is necessary to make them thin to secure elasticity. There was a request and it was difficult in practice. SUMMARY OF THE INVENTION The present invention has been made under such a circumstance, and it is easy to reduce the cost of the components, and to provide a terminal structure of an instrument that can be reliably and easily brought into contact with a circuit board to be housed. For the purpose of providing. SUMMARY OF THE INVENTION In order to solve such a problem, a terminal structure of an instrument according to the present invention is mounted on a case of the instrument to the outside and mounted on a circuit board inside the case. A terminal spring fitting to be connected, a nut member disposed on the back side of the terminal spring fitting, and a terminal screw inserted through the terminal spring fitting from the outside of the case and screwed into the nut member; The first and second opening pieces are provided extending from the both ends of the intermediate piece into the case so as to face each other, and the terminal spring fittings are formed in a substantially U-shape, and the first and second opening pieces are formed. On a piece
Provide locking pieces cut and raised outward toward one side of the middle,
The first open piece is provided with a contact piece which is in electrical contact with the circuit board, and the nut member comes into contact with the inside of the first open piece to form an L-shape to the vicinity of the base of the locking piece. It is configured by providing a bent piece that extends integrally. [0007] The present invention provides the first and second embodiments .
Lock each of the open pieces so that they hook on the above case
And the first open piece is held between the case and the bent piece.
And make the second open piece abut the inside of the second open piece.
Between the contact piece provided on the case and the case.
To hold the terminal spring fitting in the case. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view showing an embodiment of a terminal structure of instruments according to the present invention. In FIG. 1, a case 19 formed by molding an insulating synthetic resin into a box shape.
A terminal spring fitting 23 as a connection terminal is fitted into a holding window 21 provided on the rear end side of the case 19 and held by a case 19. As shown in FIGS. 2 to 5, the terminal spring fitting 23 is a conductive strip material which is easy to process and has a high elasticity (spring property) such as phosphor bronze, beryllium copper alloy, brass, nickel silver or the like. And first and second open pieces 23b and 23c extending from both ends of the intermediate piece 23a so as to face each other. The first and second open pieces 23b , 23c are fitted from the holding window 21 so as to contact the case 19. That is, the terminal spring fitting 23 is moved from one end (the upper side in FIG. 1) of the intermediate piece 23a to the first
The open piece 23b is bent at an obtuse angle and extends, while the second open piece 23c is bent at an acute angle and extends from the other end (lower side in FIG. 1), and the intermediate piece 23a is formed of the first and second pieces. The opening pieces 23b and 23c and the rear end surface of the case 19 are formed obliquely and face the second opening piece 23c obliquely. From the first and second opening pieces 23b and 23c, locking pieces 25a and 25b directed toward the intermediate piece 23a are cut and raised outward, and these locking pieces 25a and 25c are cut out.
b is locked so as to be hooked on the hook portions 27 a and 27 b provided on the case 19, so that the terminal spring fitting 23 is difficult to come off from the case 19. In the first and second opening pieces 23b and 23c, a ribbing 26 is formed around the U-shaped cut groove forming the locking pieces 25a and 25b, and the first and second opening pieces 23b made of a thin plate are formed. , 23
c is reinforced, and it is difficult to remove from the case 19. The first open piece 23b of the terminal spring fitting 23 is a contact piece 23d which is formed in a U-shape from the middle toward the second open piece 23c, and the tip of the contact piece 23d is further inside. It is curved to The tip of the contact piece 23d is elastically connected to a connection electrode (not shown) of the circuit board 29 as described later. As can be seen from FIG. 2, the contact piece 23d has a shape in which two elastic pieces are connected in the middle in order to enhance the spring property, but the shape is not limited to this. Second open piece 23c of terminal spring fitting 23
Is pressed against the inside of the case 19 near the holding window 21. Inside the intermediate piece 23a of the terminal spring metal fitting 23, a plate-shaped nut member 31 made of a conductive plate thicker than the terminal spring metal fitting 23 and having substantially the same shape as or slightly smaller than the intermediate piece 23a is held and held by appropriate means (not shown). Have been. As shown in FIG. 3, a screw hole 31a is formed through the center of the nut member 31, and a conductive material inserted through a through hole 23e formed in the center of the intermediate piece 23a of the terminal spring fitting 23. Is screwed obliquely into the screw hole 31a toward the second opening piece 23b.
In the figure, reference numeral 33 a is a washer formed on the terminal screw 33. Even when the terminal screw 33 is screwed as far as possible into the screw hole 31a, the tip of the screw is the first and second open pieces 23b and 23c, the circuit board 29 or the contact piece 3 described later.
It is screwed in such a size and positional relationship that it does not come into contact with 7. From the viewpoint of securing a stable and strong tightening state by the terminal screw 33, it is preferable to form the screw hole 31a by slightly projecting the center of the nut member 31 inward. The first opening piece 23 of the nut member 31
A bent piece 3 bent in an obtuse and L-shape from the edge on the side b.
1b is integrally formed, abuts against the inside of the first opening piece 23b, and extends to near the base of the locking piece 25a. Therefore, the first open piece 23b is held by the case 19 and the bent piece 31b. On the holding wall 35 facing the holding window 21 of the case 19, there is provided a contact piece 37 which is in contact with the inside of the second open piece 23c of the terminal spring fitting 23 (on the side facing the first open piece 23b). The second opening piece 2 is integrally formed so as to protrude.
3c is held between the contact piece 37 and the case 19 via the locking piece 25b. On the holding wall 35 of the case 19,
An insertion groove 39 into which the circuit board 29 is inserted is formed. The circuit board 29 has a connection electrode or other electrode (not shown) to which the contact piece 23d of the terminal spring metal fitting 23 is connected at a position closer to the end on one side (upper side in FIG. 1). . When the measuring instrument is, for example, a temperature controller or a temperature indicator, the circuit board 29 includes a temperature measuring circuit for calculating a measured temperature based on a temperature measuring signal from a thermocouple or the like, and a main circuit such as a temperature controller or a temperature indicator. Although a temperature compensating circuit for compensating the temperature measurement signal and the like are formed, they are not the main part of the present invention, so that the illustration is omitted. In such an instrument terminal structure, when the end of the circuit board 29 is inserted so as to fit into the insertion groove 39 of the holding wall 35, the contact piece 23d of the terminal spring fitting 23 is connected to the connection electrode of the circuit board 29. It is elastically and electrically connected. Therefore, if the terminal screw 33 is loosened and an external lead wire or an external terminal plate (not shown) is connected and tightened, an electric signal from the external lead wire or the external terminal plate is applied to the terminal spring fitting 2.
3 can be taken into the circuit board 29. Also, the circuit board 2
9 can be easily removed from the holding wall 35 and the terminal spring fitting 23. The terminal structure of the instrument having such a configuration is such that a terminal spring fitting 23 to be fitted into the case 19 is
A first and second opening pieces 23b and 23c are provided from both ends of each of the first opening pieces 23b and 23c so as to extend inwardly of the case so as to face each other. A contact piece 23d that can be elastically and electrically pressed against the substrate 29 is provided. A nut member 31 is disposed on the back side of the terminal spring fitting 23, and a terminal screw 33 is screwed into the nut member 31 from outside the case 19, and further, The nut member 31 is provided with a bent piece 31b extending in contact with the inside of the first open piece 23b to form an L-shape, while the second open piece 23c is formed on the contact piece 37 formed on the case 19. Since the nut members 31 are brought into contact with each other, the nut member 31 may be simply bent and formed into an L-shape.
Is extremely inexpensive, and the overall product cost can be greatly reduced. On the other hand, in the conventional U-shaped nut member 3 as shown in FIG. 9, the conductive plate is often formed by bending the conductive plate at two places, so that it is difficult to reduce the manufacturing cost, and the cost is reduced. Was an obstacle. Moreover, in the above-described configuration, the first opening piece 23 elastically connected to the circuit board 29 is provided.
b is securely and satisfactorily supported between the case 19 and the bent piece 31b of the nut member 31, so that the mechanical strength can be kept good even with respect to the deformation displacement caused by the insertion and removal of the circuit board 29. And the elastic pressure with the circuit board 29 can be improved. Further, the second opening piece 23c can be supported between the contact piece 37 and the case 19, and the mechanical strength for holding the terminal screw 23 can be kept good . However, a certain electrical distance (creep distance) along the surface of the case 19 is required between the adjacent terminal screw fittings 23, and the required creep distance is determined by the electric resistance of the material used. It depends on the quality of the insulation. When the case 19 is formed of a material having poor electrical insulation between the adjacent terminal screw fittings 23, a required creepage distance may not be secured. The creepage distance is, for example, as shown in FIG.
In the case where the terminal spring metal fittings 23 (the lower terminal spring metal fittings 23 are not shown) are arranged adjacent to each other in the up-down direction in FIG. This is an electrical distance along the inner surface of the case 19 via the groove 39 and the holding wall 35 on the side of the adjacent terminal spring fitting 23. In this regard, by providing the contact piece 37 in the case 19, the holding wall 3 can be separated from the one terminal spring fitting 23.
5. The electrical distance along the inner surface of the case 19 via the insertion groove 39 and the holding wall 35 on the side of the adjacent terminal spring fitting 23 becomes substantially longer, and even if the case 19 is formed of a resin material having poor insulation properties. The required creepage distance can be secured. That is, the required creepage distance can be ensured without being affected by the insulating properties of the case material. The intermediate piece 23a of the terminal spring fitting 23
Obliquely with respect to the first opening piece 23b,
6, the terminal spring fittings 23 may be arranged on the rear end side of the instrument case 19 as shown in FIG. The terminal plate can be attached to the terminal spring fitting 23 from an oblique direction,
Even if the space between the adjacent terminal spring fittings 23 is small, connection can be made.
9 can be arranged. In addition, since the space of the holding window 21 in which the terminal spring fitting 23 is fitted can be reduced,
The efficiency of arranging the terminals in the case 19 is further improved, and more terminals can be arranged even with small instruments, so that the functions of the instruments can be increased. In the terminal structure according to the present invention described above, as shown in FIG. 7, the first open piece 23b extending from the terminal spring fitting 23 is sharply formed from the intermediate piece 23a by the second open piece 23b.
The open piece 23c can be bent at an obtuse angle, and the bent piece 31b bent from the nut member 31 can also be bent at an acute angle to extend so as to contact the first open piece 23b. is there. The other configuration is the same as that of FIG. 1 and the description is omitted, but FIG. 7 shows the first and second open pieces 23b and 23c upside down as compared to FIG. The terminal structure having the structure shown in FIGS. 1 and 7 can be arranged, for example, as shown in FIG. 8, and the arrangement of the terminal spring fittings 23 requires only a small amount of space. Since the spring fittings 23 can be effectively arranged, the circuit board 29 can be easily added, and various optional function requests can be met. Further, the circuit board 2
Since the space between the components 9 can be widened, there is an advantage that the arrangement, size, and the like of the housing components are hardly restricted. As described above, the terminal structure of the instrument according to the present invention has a U-shape having an intermediate piece and first and second open pieces extending from both ends thereof to face each other. Attach the terminal spring fittings to the instrument case to the outside .
Each of the first and second open pieces is directed outward toward the intermediate side.
A cut-and-raised locking piece is provided, a nut member is arranged on the back side of the terminal spring metal fitting, a terminal screw is screwed into the nut member from the outside into the terminal spring metal fitting, and the contact piece of the first open piece is inserted into the case. And the nut member is provided with a bent piece that abuts the inside of the first open piece and integrally extends in an L-shape to the vicinity of the base of the locking piece . Each member of the first and second open pieces
Lock the stopper so that it hooks on the case.
The first open piece is held between the case and the bent piece, and the second
The case so that the open piece contacts the inside of the second open piece
Between the contact piece provided in
Since the child spring fitting is held in the case, the manufacturing cost of the nut member is extremely low, the overall product cost can be greatly reduced, and the housed circuit board can be reliably and easily contacted. In addition, the first opening piece abuts against the bent piece of the nut member and is reliably and well supported between the case and the mechanical strength of the circuit board even when it is deformed due to the insertion and removal of the circuit board. it can. Further, the second opening piece is also reliably supported between the contact piece and the case, and the holding strength of the terminal screw fitting can be kept good.

【図面の簡単な説明】 【図1】本発明に係る計器類の端子構造の実施の形態を
示す概略断面図(一部正面で示す。図6中のI−I間断
面。)である。 【図2】図1中の端子ばね金具、ナット部材および端子
ねじを組合せた状態を示す斜視図である。 【図3】図1中の端子ばね金具、ナット部材および端子
ねじを示す分解斜視図である。 【図4】図1中の端子ばね金具の平面図である。 【図5】図1中の端子ばね金具の底面図である。 【図6】本発明に係る計器類の端子構造を用いる計器ケ
ースの後端部側を示す背面図である。 【図7】本発明の計器類の端子構造における端子ばね金
具、ナット部材および端子ねじの組合せの他の実施の形
態を示す側面図である。 【図8】本発明に係る計器類の端子構造を用いた計器ケ
ースの断面図(図6中のIIX−IIX間断面。)であ
る。 【図9】従来の計器類の端子構造を示す断面図(一部側
面で示す。)である。 【符号の説明】 1、23 端子ばね金具 1a、1b 開放片 3、31 ナット部材 5a、5b、25a、25b 係止片 7、19 ケース 7a、7b、27a、27b 引掛け部 9、33 端子ねじ 11 ねじ部 13、23d 接触片 15、39 挿入溝 17、29 回路基板 21 保持窓 23a 中間片 23b 開放片(第1の開放片) 23c 開放片(第2の開放片) 23e 貫通孔 26 リブニング 31a ねじ孔 31b 屈曲片 33a 座金 35 保持壁 37 当接片
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view (partly in front view, taken along the line II in FIG. 6) showing an embodiment of a terminal structure of instruments according to the present invention. FIG. 2 is a perspective view showing a state where a terminal spring fitting, a nut member, and a terminal screw in FIG. 1 are combined. FIG. 3 is an exploded perspective view showing a terminal spring fitting, a nut member, and a terminal screw in FIG. 1; FIG. 4 is a plan view of the terminal spring fitting in FIG. 1; FIG. 5 is a bottom view of the terminal spring fitting in FIG. 1; FIG. 6 is a rear view showing a rear end side of an instrument case using the terminal structure of instruments according to the present invention. FIG. 7 is a side view showing another embodiment of a combination of a terminal spring fitting, a nut member, and a terminal screw in a terminal structure of instruments of the present invention. FIG. 8 is a cross-sectional view (cross-section taken along IIX-IIX in FIG. 6) of an instrument case using the terminal structure of instruments according to the present invention. FIG. 9 is a cross-sectional view (partially shown in side view) showing a terminal structure of a conventional instrument. [Description of Signs] 1, 23 Terminal spring fittings 1a, 1b Opening pieces 3, 31 Nut members 5a, 5b, 25a, 25b Locking pieces 7, 19 Cases 7a, 7b, 27a, 27b Hooking portions 9, 33 Terminal screws 11 Screw portion 13, 23d Contact piece 15, 39 Insert groove 17, 29 Circuit board 21 Holding window 23a Intermediate piece 23b Open piece (first open piece) 23c Open piece (second open piece) 23e Through hole 26 Ribbing 31a Screw hole 31b Bending piece 33a Washer 35 Holding wall 37 Contact piece

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平8−250168(JP,A) 特開 平9−229722(JP,A) 特開 平5−62725(JP,A) 特開 平5−67479(JP,A) 実開 平4−45922(JP,U) 実開 昭59−53783(JP,U) (58)調査した分野(Int.Cl.7,DB名) G01R 1/04 H01R 4/38 H01R 9/24 H01R 12/04 G01D 11/24 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-250168 (JP, A) JP-A-9-229722 (JP, A) JP-A-5-62725 (JP, A) JP-A-5-225 67479 (JP, A) Japanese Utility Model Hei 4-45922 (JP, U) Japanese Utility Model Application Sho 59-53783 (JP, U) (58) Fields surveyed (Int. Cl. 7 , DB name) G01R 1/04 H01R 4 / 38 H01R 9/24 H01R 12/04 G01D 11/24

Claims (1)

(57)【特許請求の範囲】 【請求項1】 計器類のケースに外部へ向けて取付けら
れるとともに前記ケース内部の回路基板に接続される端
子ばね金具と、 この端子ばね金具の裏面側に配置されたナット部材と、 前記端子ばね金具に前記ケースの外部から挿通されて前
記ナット部材にねじ込まれる端子ねじと、 を具備する計器類の端子構造において、 前記端子ばね金具は、前記端子ねじの挿通される中間片
の両端部から互いに対向して前記ケース内側へ延びる第
1および第2の開放片を有して概略コ字状に形成され
前記第1および第2の開放片に前記中間片側へ向け外側
へ各々切り起こされた係止片を設けるとともに前記回路
基板に電気的に圧接する接触片を前記第1の開放片に有
し、 前記ナット部材は、前記第1の開放片の内側に当接して
当該係止片の付け根近傍までL字形に一体的に延びる屈
曲片を有してなり、 前記端子ばね金具は、前記第1および第2の開放片の前
記各係止片を前記ケースに引っ掛けるように係止させ、
前記第1の開放片を前記ケースと前記屈曲片間で保持さ
せ、前記第2の開放片を前記第2の開放片の内側に当接
するよう前記ケースに設けた当接片と前記ケースとの間
で保持させてなる ことを特徴とする計器類の端子構造。
(57) [Claims] [Claim 1] A terminal spring fitting which is attached to a case of an instrument outwardly and which is connected to a circuit board inside the case, and which is disposed on the back side of the terminal spring fitting. And a terminal screw inserted into the terminal spring fitting from the outside of the case and screwed into the nut member, wherein the terminal spring fitting is inserted through the terminal screw. It is formed in a substantially U-shape with first and second open pieces extending from both ends of the intermediate piece facing each other to the inside of the case ,
The first and second open pieces are outwardly directed toward the intermediate side.
Each cut is provided with the awakened locking piece has a contact piece electrically pressed against the circuit board to said first opening piece to the nut member abuts against the inner side of the first open piece hand
The terminal piece includes a bent piece integrally extending in an L-shape up to the vicinity of the base of the locking piece, and the terminal spring fitting is provided in front of the first and second opening pieces.
Each locking piece is locked so as to be hooked on the case,
The first open piece is held between the case and the bent piece.
And abuts the second open piece on the inside of the second open piece.
Between the contact piece provided on the case and the case
A terminal structure for instruments, characterized by being held by a terminal.
JP34362897A 1997-12-01 1997-12-01 Instrument terminal structure Expired - Lifetime JP3473361B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34362897A JP3473361B2 (en) 1997-12-01 1997-12-01 Instrument terminal structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34362897A JP3473361B2 (en) 1997-12-01 1997-12-01 Instrument terminal structure

Publications (2)

Publication Number Publication Date
JPH11160353A JPH11160353A (en) 1999-06-18
JP3473361B2 true JP3473361B2 (en) 2003-12-02

Family

ID=18363006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34362897A Expired - Lifetime JP3473361B2 (en) 1997-12-01 1997-12-01 Instrument terminal structure

Country Status (1)

Country Link
JP (1) JP3473361B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5110384B2 (en) * 2008-08-07 2012-12-26 住友電装株式会社 connector
JP5642440B2 (en) * 2010-07-07 2014-12-17 矢崎総業株式会社 connector
JP6712794B2 (en) * 2014-08-07 2020-06-24 パナソニックIpマネジメント株式会社 Connector and header and socket used for the connector
JP6572544B2 (en) * 2015-01-29 2019-09-11 富士電機株式会社 Terminal block and temperature controller
JP6456314B2 (en) * 2016-01-29 2019-01-23 株式会社鷺宮製作所 Refrigerant circuit components

Also Published As

Publication number Publication date
JPH11160353A (en) 1999-06-18

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