JP2558128Y2 - Charging part fixed support base of distribution board - Google Patents

Description

【考案の詳細な説明】 【０００１】 【産業上の利用分野】本考案は、単相三線式及び単相二
線式の住宅用分電盤の充電部固定台及び充電部支持台の
改良に係り、詳しくは、板厚の異なる母線バーの固定支
持及びそのワンタッチ取り付けを可能となす技術に関す
るものである。 【０００２】 【従来の技術】図６及び図７は、夫々従来使用されてい
る単相三線式の分電盤の充電部支持台３０及び充電部固
定台４０の概略説明図で、図６において、３１は支持台
爪部、３２は充電部カバー、３３は厚さ２ｍｍの母線バ
ー、３４は安全ブレーカで、このように構成された充電
部支持台３０は分電盤内に複数個連設され（図４参
照）、充電部支持台３０の各々の支持位置に三本の母線
バー３３、３３、３３を夫々重置してそれらを支持し、
母線バー３３のたるみを防止していた。そして、支持台
爪部３１が充電部カバー３２を保持するようになってい
た。 【０００３】図７において、４１は母線バー固定ネジ、
４２は中底板、３３は厚さ２ｍｍの母線バー、３４は安
全ブレーカで、このように構成された充電部固定台４０
は、その各々の固定位置に三本の母線バー３３、３３、
３３を夫々重置し、それらの母線バー３３を母線バー固
定ネジ４１によって固定台４０にネジ止めして、短絡等
の事故を防止していた。そして、従来、住宅用分電盤に
は１００Ａｍｐ用の板厚３ｍｍの母線バーが適用されな
かったので、上記の充電部支持台３０及び充電部固定台
４０は、板厚３ｍｍの母線バーに使用されることが無
く、専ら板厚２ｍｍの母線バー３３に使用されていた。 【０００４】 【考案が解決しようとする課題】上記のように、板厚２
ｍｍの母線バーの場合は、充電部支持台及び充電部固定
台の２種類を使用して充電部を支持又は固定し、夫々の
役割を果すようになっているため、必ずそれらの２種類
を必要とした。又、充電部支持台のみを使用する機種が
あるが、そういう場合に２００Ｖ切り替えを行うとして
も、中性母線バーが固定されていないので、全分岐回路
に亙って切り替えすることが出来ず、２００Ｖ切り替え
のために充電部固定台を必要とした。このように、常に
充電部支持台と充電部固定台の両方を製造し在庫して置
かなければならないという煩わしさや無駄があった。 【０００５】又、充電部固定台を使用する場合は、狭い
スペース内でネジ止めしなければならないので、作業が
しずらく厄介であった。更に、近時、板厚３ｍｍの母線
バーを使用する需要が起って来ているので、上記従来の
充電部支持台及び充電部固定台では兼用が出来ず、２ｍ
ｍ又は３ｍｍの板厚に応じた支持台及び固定台を夫々準
備しなければならないという問題が起ってきた。 【０００６】 【課題を解決するための手段】本考案は、上記従来技術
の欠点を解消するため、母線バーの支持及び固定が可能
で且つ板厚の異なる母線バーに兼用が出来、しかも取り
付けが容易な充電部固定支持台を提供するもので、その
構成は、平行な端板とその端板の基端部を連結する底板
とから成る平面コ字状の基板の前記底板中央部に、母線
バーの第１固定支持部材を設けると共に、底板の延長部
上方及びその延長部と反対側の前記端板の先端部外側上
方に、支柱を介して前記第１固定支持部材と同形状且つ
それと同じ向きの第２固定支持部材及び第３固定支持部
材を夫々設け、更に前記第２固定支持部材側の端板の先
端部及び前記第３固定支持部材側の底板端側部に、基板
固定用の長孔を夫々設け、前記固定支持部材が、断面コ
字状の弾性枠板の両端板先端部に内向きに対向する係止
爪を夫々設け、更に底板中央部に開口側へ向けて係止突
起を垂設し、その左右両側部に前記係止爪方向へ付勢す
る弾性部材を夫々設けて成ることにある。 【０００７】 【作用】分電盤の中底板に基板がネジ止めされ、その基
板の底板中央部の第１固定支持部材の対向する係止爪の
間に母線バーを押圧すると、係止爪はその弾性により外
方へ開くので母線バーが係止爪下方に押下げられ、母線
バーの位置決め孔に底板中央部の係止突起が嵌入して、
母線バーは定位置に位置決めされると共に、係止突起の
左右両側に設けた一対の弾性部材によって係止爪方向へ
付勢され、その弾性部材と係止爪との間に挟持固定され
る。又、他の第２固定支持部材及び第３固定支持部材
に、他の二本の母線バーが前記と同様の動作で夫々挟持
固定される。そして、以上の動作は母線バーを下方へ押
圧するだけで良いので、ワンタッチ取り付けを可能とな
すものである。尚、母線バーの厚みが２ｍｍ又は３ｍｍ
と異なっても、弾性部材の弾性力により母線バーが弾性
部材と係止爪との間に挟持固定され兼用が可能となる。 【０００８】 【実施例】本考案に係る分電盤の充電部固定支持台の一
実施例を添付図面に基づいて説明する。図１、図２及び
図３に示すように、充電部固定支持台１は対向する安全
ブレーカ２、２間に設けられ、図１において、３は充電
部固定支持台１の基板、４、５及び６は夫々第１、第２
及び第３固定支持部材としての第１、第２及び第３母線
バー固定支持部、７は固定支持台取り付けネジである。 【０００９】基板３は平行な端板３ｂ、３ｃと、その端
板３ｂ、３ｃの基端部を連結する底板３ａとから成る平
面コ字状の板で、基板３の底板３ａ中央部と第１母線バ
ー固定支持部４とが一体化されている。又、底板３ａの
延長部上方及びその延長部と反対側の端板３ｂの先端部
外側上方には、支柱８、８を介して第１固定支持部材４
と同形状且つそれと同じ向きの第２母線バー固定支持部
５及び第３母線バー固定支持部６が夫々設けられてい
る。第２母線バー固定支持部５側の端板３ｃの先端部及
び第３母線バー固定支持部６側の底板３ａ端側部には、
分電盤の中底板２３（図４参照）に対し位置決めし且つ
その位置でネジ止めするための長溝孔９、９が夫々欠切
され、基板３はそれらの長溝孔９に挿通した固定支持台
取り付けネジ７によって分電盤の中底板２３に固着され
る。尚、基板３の底板３ａ中央部は第１母線バー固定支
持部４と一体化することなく、第１母線バー固定支持部
４と分離した底板３ａであって、その表面に第１母線バ
ー固定支持部４を載置しても良い。 【００１０】第１、第２及び第３の各母線バー固定支持
部４、５及び６は、いずれも同一構造であるので第１母
線バー固定支持部４についてのみ説明し、他は説明を省
略する。第１母線バー固定支持部４は、合成樹脂等の弾
性体により一体的に構成されている。即ち、断面コ字状
の弾性枠板の両端板１０先端部に内向きに対向する係止
爪としての母線バー固定爪１１が夫々設けられ、更に底
板１２中央部には開口側へ向けて係止突起としての位置
決めボス１３が垂設され、その位置決めボス１３の左右
両側には母線バー固定爪１１方向へ付勢する弾性部材と
してのスペーサバネ１４、１４が一対設けられている。
そして、両端板１０のうち外側の端板１０の先端部が延
長され、その延長端部には固定支持台爪部１７が夫々設
けられている。尚、各母線バー固定支持部は、必ずしも
上記の如く各構成部を合成樹脂等の弾性体により一体的
に構成する必要はなく、例えば、スペーサバネ１４の代
りに鋼製の板バネやコイルバネを装着することも出来
る。 【００１１】上記にように構成された充電部固定支持台
１は、次のように動作し使用される。即ち、図１のよう
に、第２母線バー固定支持部５の対向する母線バー固定
爪１１、１１の間に厚さ２ｍｍの母線バー１５を押圧す
ると、母線バー固定爪１１はその弾性により外方へ開く
ので母線バー１５が母線バー固定爪１１下方に押下げら
れ、母線バー１５の位置決め孔１６に底板１２中央部の
位置決めボス１３が嵌入して、母線バー１５は定位置に
位置決めされると共に、一対のスペーサバネ１４によっ
て母線バー固定爪１１方向へ付勢され、そのスペーサバ
ネ１４と母線バー固定爪１１との間に挟持固定される。 【００１２】更に、図２示のように、第１母線バー固定
支持部４及び第３母線バー固定支持部６に、他の二本の
母線バー１５が前記と同様の動作で夫々挟持固定され
る。そして、以上の動作は母線バー１５を下方へ押圧す
るだけで良く、従来のようにネジ止めする必要が無くワ
ンタッチ取り付けが可能であるので、取り付け作業が容
易である。そして、各母線バーを取り付けた後、固定支
持台爪部１７によって充電部カバー１８を保持する。 【００１３】図２は充電部固定支持台１に厚み２ｍｍの
母線バー１５を取り付けた場合を示しているが、図３は
充電部固定支持台１に厚み３ｍｍの母線バー１９を取り
付けた場合を示している。このように同一形状の充電部
固定支持台１により、母線バーの厚みが２ｍｍ又は３ｍ
ｍと異なっても、スペーサバネ１４の弾性力によりスペ
ースの調節が成されるので、母線バー１５又は母線バー
１９がスペーサバネ１４と母線バー固定爪１１との間に
挟持固定され、充電部固定支持台１の兼用が可能となっ
ている。 【００１４】尚、図４は分電盤の概略平面図で、充電部
固定支持台１を取り付けた状態を示しており、同図にお
いて、２０はキヤビネット、２１は漏電ブレーカ、２２
はレール、２３は中底板、２４はＬスペース木板であ
る。そして、本考案の充電部固定支持台１の第１、第２
及び第３の各母線バー固定支持部４、５及び６は、図５
示の如く、安全ブレーカ２を取り付けるための種々厚み
の異なるろ中底板２３をキャビネット２０に固定する場
合のように、各種の板材取り付にも使用できるものであ
る。又、本考案は上記実施例に関わらず、本考案の趣旨
を逸脱しない範囲において適宜変更し使用することが出
来る。 【００１５】 【考案の効果】以上詳述したように、本考案に係る分電
盤の充電部固定支持台は、基板に母線バーの第１固定支
持部材と、それと同形状の第２固定支持部材及び第３固
定支持部材とを設け、各固定支持部材が、断面コ字状の
弾性枠板の両端板先端部に内向きに対向する係止爪を、
底板中央部に係止突起を、更にその左右両側部に前記係
止爪方向へ付勢する弾性部材を夫々設けて構成したもの
であるから、母線バーの支持及び固定が出来ると共に、
同一品種で板厚の異なる母線バーに兼用使用が出来るの
で、生産及び部品管理上のメリットが多く、しかも、従
来のようにネジ止めする必要が無く、ワンタッチで取り
付けられるので作業が容易である等、実用上優れた効果
を奏するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a charging section fixing stand and a charging section support stand of a single-phase three-wire system and a single-phase two-wire distribution board for a house. More specifically, the present invention relates to a technique for fixing and supporting bus bars having different thicknesses and one-touch mounting thereof. 2. Description of the Related Art FIGS. 6 and 7 are schematic illustrations of a charging section support base 30 and a charging section fixing base 40 of a conventionally used single-phase three-wire distribution board, respectively. Reference numeral 31 denotes a support base claw, 32 denotes a charging part cover, 33 denotes a bus bar having a thickness of 2 mm, and 34 denotes a safety breaker. A plurality of charging part support bases 30 configured as described above are provided in a distribution board. (See FIG. 4), three bus bars 33, 33, 33 are respectively placed at the support positions of the charging section support base 30 to support them,
The sag of the bus bar 33 was prevented. Then, the support claw 31 holds the charging unit cover 32. In FIG. 7, reference numeral 41 denotes a bus bar fixing screw,
Reference numeral 42 denotes an intermediate bottom plate, 33 denotes a bus bar having a thickness of 2 mm, and 34 denotes a safety breaker.
Has three busbars 33, 33,
The bus bars 33 are placed one on top of the other, and the bus bars 33 are screwed to the fixing base 40 with bus bar fixing screws 41 to prevent an accident such as a short circuit. Conventionally, a bus bar having a thickness of 3 mm for 100 Amp has not been applied to a distribution board for a house. Therefore, the above-described charging part support base 30 and the charging part fixing base 40 are used for a bus bar having a thickness of 3 mm. It was used exclusively for the bus bar 33 having a plate thickness of 2 mm. [0004] As described above, the plate thickness 2
In the case of a bus bar of mm, the charged part is supported or fixed by using two types of the charged part support base and the charged part fixing base, and the two types are always used. Needed. In addition, there is a model that uses only the charging unit support base. In such a case, even if the switching is performed at 200 V, the switching cannot be performed over the entire branch circuit because the neutral bus bar is not fixed. A charging unit fixing base was required for switching 200V. As described above, both the charging part support base and the charging part fixing base have to be manufactured, stocked, and inconvenienced. [0005] In addition, when the charging section fixing base is used, it must be screwed in a narrow space, which makes the operation difficult and troublesome. Further, recently, there has been a demand for using a bus bar having a plate thickness of 3 mm, so that the above-mentioned conventional charging part support base and charging part fixing base cannot be used for 2 m.
A problem has arisen in that a support table and a fixing table corresponding to a plate thickness of m or 3 mm must be prepared. SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, so that the bus bar can be supported and fixed, can be used for bus bars having different thicknesses, and can be mounted. The present invention provides an easy-to-use charging unit fixing support base, which has a bus bar at the center of the bottom plate of a flat U-shaped substrate including a parallel end plate and a bottom plate connecting base ends of the end plates. The first fixed support member of the bar is provided, and the same shape and the same shape as the first fixed support member is provided above the extension of the bottom plate and above the outer end of the end plate on the side opposite to the extension by means of a column. A second fixed support member and a third fixed support member are provided, respectively, and further, a board fixing portion is provided on a tip end portion of the end plate on the second fixed support member side and a bottom plate end side portion on the third fixed support member side. Each of the long holes is provided, and the fixed support member has a U-shaped cross section. An inwardly facing engaging claw is provided at each end of the elastic frame plate, and an engaging protrusion is vertically provided at the center of the bottom plate toward the opening side. That is, each of the elastic members is provided with a biasing force. When the substrate is screwed to the middle bottom plate of the distribution board and the bus bar is pressed between the opposite locking claws of the first fixed support member at the center of the bottom plate of the substrate, the locking claws are The bus bar is pushed down below the locking claw because it opens outward due to its elasticity, and the locking projection at the center of the bottom plate fits into the positioning hole of the bus bar,
The bus bar is positioned at a fixed position, and is urged in the locking claw direction by a pair of elastic members provided on both left and right sides of the locking projection, and is pinched and fixed between the elastic member and the locking claw. Further, the other two bus bars are sandwiched and fixed to the other second fixed support member and the third fixed support member by the same operation as described above. Since the above operation only needs to press the bus bar downward, one-touch mounting is possible. In addition, the thickness of the bus bar is 2 mm or 3 mm.
However, the bus bar is sandwiched and fixed between the elastic member and the locking claw by the elastic force of the elastic member, and can be used for both purposes. An embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1, 2 and 3, the charging unit fixing support 1 is provided between the opposing safety breakers 2, 2. In FIG. And 6 are the first and second respectively
The first, second, and third bus bar fixed support portions 7 as the third fixed support member are fixed support base mounting screws. The substrate 3 is a flat U-shaped plate composed of parallel end plates 3b and 3c and a bottom plate 3a connecting the base ends of the end plates 3b and 3c. One bus bar fixed support part 4 is integrated. The first fixed support member 4 is provided above the extension of the bottom plate 3a and above the outer end of the end plate 3b on the side opposite to the extension by supporting columns 8,8.
A second bus bar fixing support portion 5 and a third bus bar fixing support portion 6 having the same shape and the same direction as those are provided, respectively. At the tip of the end plate 3c on the side of the second bus bar fixing support 5 and the end of the bottom plate 3a on the side of the third bus bar fixing support 6,
Slots 9, 9 for positioning with respect to the midsole plate 23 of the distribution board (see FIG. 4) and screwing at that position are respectively cut off, and the substrate 3 is fixed on a stationary support inserted through the slots 9. It is fixed to the middle bottom plate 23 of the distribution board by the mounting screw 7. The central portion of the bottom plate 3a of the substrate 3 is a bottom plate 3a separated from the first bus bar fixing support 4 without being integrated with the first bus bar fixing support 4, and has a first bus bar fixing surface. The support 4 may be placed. Since the first, second and third bus bar fixing supports 4, 5 and 6 have the same structure, only the first bus bar fixing support 4 will be described, and the other description will be omitted. I do. The first bus bar fixing support 4 is integrally formed of an elastic body such as a synthetic resin. That is, bus bar fixing claws 11 as locking claws facing inward are provided at the ends of the both end plates 10 of the elastic frame plate having a U-shaped cross section, respectively. Positioning bosses 13 as suspending projections are vertically provided, and a pair of spacer springs 14, 14 as elastic members biasing toward the bus bar fixing claws 11 are provided on both left and right sides of the positioning boss 13.
The end of the outer end plate 10 of the end plates 10 is extended, and fixed support base claws 17 are provided at the extended ends. It is not always necessary for each bus bar fixing support portion to integrally constitute each component as described above with an elastic body such as a synthetic resin. For example, a steel leaf spring or a coil spring is mounted instead of the spacer spring 14. You can do it. The charging section fixing support 1 configured as described above operates and is used as follows. That is, as shown in FIG. 1, when a bus bar 15 having a thickness of 2 mm is pressed between the opposing bus bar fixing claws 11 of the second bus bar fixing support portion 5, the bus bar fixing claw 11 is released due to its elasticity. The bus bar 15 is pushed downward below the bus bar fixing claw 11, and the positioning boss 13 at the center of the bottom plate 12 is fitted into the positioning hole 16 of the bus bar 15, and the bus bar 15 is positioned at a fixed position. At the same time, the pair of spacer springs 14 urges in the direction of the bus bar fixing claw 11, and is held and fixed between the spacer spring 14 and the bus bar fixing claw 11. Further, as shown in FIG. 2, the other two bus bars 15 are respectively held and fixed to the first bus bar fixing support 4 and the third bus bar fixing support 6 by the same operation as described above. You. The above operation only needs to press the bus bar 15 downward, and it is not necessary to screw it as in the conventional case, and one-touch mounting is possible, so that the mounting operation is easy. Then, after attaching each bus bar, the charging unit cover 18 is held by the fixed support claw 17. FIG. 2 shows a case where a bus bar 15 having a thickness of 2 mm is attached to the charging unit fixing support 1. FIG. 3 shows a case where a bus bar 19 having a thickness of 3 mm is attached to the charging unit fixing support 1. Is shown. Thus, the thickness of the bus bar is 2 mm or 3 m by the charging unit fixing support 1 having the same shape.
m, the space is adjusted by the elastic force of the spacer spring 14, so that the bus bar 15 or the bus bar 19 is sandwiched and fixed between the spacer spring 14 and the bus bar fixing claw 11, and the charging unit fixing support stand is provided. 1 can be shared. FIG. 4 is a schematic plan view of the distribution board, showing a state in which the charging section fixing support base 1 is attached. In FIG. 4, reference numeral 20 denotes a cabinet, 21 denotes an earth leakage breaker, and 22 denotes a ground leakage breaker.
Is a rail, 23 is a midsole plate, and 24 is an L space wooden plate. Then, the first and second parts of the charging unit fixing support base 1 of the present invention.
And the third bus bar fixing supports 4, 5, and 6
As shown in the drawing, the present invention can be used for mounting various kinds of plate materials, such as when fixing the filter middle bottom plate 23 having various thicknesses for mounting the safety breaker 2 to the cabinet 20. Further, the present invention can be appropriately changed and used without departing from the spirit of the present invention, regardless of the above embodiment. As described above in detail, the charging part fixing support of the distribution board according to the present invention has a first fixed supporting member of a bus bar on a substrate and a second fixed supporting member having the same shape. A member and a third fixed support member are provided, and each fixed support member has a locking claw that faces inwardly at the ends of both end plates of the elastic frame plate having a U-shaped cross section,
A locking projection is provided at the center of the bottom plate, and furthermore, elastic members are provided on both left and right sides thereof for biasing in the direction of the locking claw, so that the bus bar can be supported and fixed,
It can be used for the same type of bus bar of different thicknesses, so there are many advantages in production and parts management.Furthermore, there is no need to screw it as in the past, and it is easy to work because it can be attached with one touch. It has excellent practical effects.

【図面の簡単な説明】 【図１】本考案に係る分電盤の充電部固定支持台の実施
例の分解斜視図である。 【図２】図１の充電部固定支持台に厚さ２ｍｍの母線バ
ーを取り付けた状態を示す縦断面図である。 【図３】図１の充電部固定支持台に厚さ３ｍｍの母線バ
ーを取り付けた状態を示す縦断面図である。 【図４】図１の充電部固定支持台を取り付けた分電盤の
内部配置の説明図である。 【図５】本考案の構成の一部をなす母線バー固定支持部
の使用の一例を示す分解斜視図である。 【図６】従来の分電盤の充電部支持台の一例を示す縦断
面図である。 【図７】従来の分電盤の充電部固定台のの一例を示す縦
断面図である。 【符号の説明】 １・・充電部固定支持台、２・・安全ブレーカ、３・・
基板、３ａ・・底板、３ｂ，３ｃ・・端板、４・・第１
母線バー固定支持部、５・・第２母線バー固定支持部、
６・・第３母線バー固定支持部、７・・固定支持台取り
付けネジ、８・・支柱、９・・長溝孔、１０・・端板、
１１・・母線バー固定爪、１２・・底板、１３・・位置
決めボス、１４・・スペーサバネ、１５・・母線バー、
１６・・位置決め孔、１７・・固定支持台爪部、１８・
・充電部カバー、１９・・母線バー。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an embodiment of a charging unit fixing support base of a distribution board according to the present invention. FIG. 2 is a longitudinal sectional view showing a state where a bus bar having a thickness of 2 mm is attached to the charging section fixing support base of FIG. 1; FIG. 3 is a longitudinal sectional view showing a state where a bus bar having a thickness of 3 mm is attached to the charging section fixing support base of FIG. 1; FIG. 4 is an explanatory diagram of an internal arrangement of a distribution board to which the charging unit fixing support of FIG. 1 is attached. FIG. 5 is an exploded perspective view showing an example of the use of a bus bar fixing support part that forms a part of the configuration of the present invention. FIG. 6 is a longitudinal sectional view showing an example of a conventional charging section support base of a distribution board. FIG. 7 is a longitudinal sectional view showing an example of a conventional charging section fixing base of a distribution board. [Explanation of symbols] 1..Charging part fixed support base.2.Safety breaker.3 ..
Substrate, 3a ... bottom plate, 3b, 3c ... end plate, 4 ... first
Bus bar fixing support, 5 second bus bar fixing support,
6 3rd busbar fixed support, 7 fixed mounting base mounting screw, 8 support, 9 long slot, 10 end plate,
11, busbar bar fixing claw, 12 bottom plate, 13 positioning boss, 14 spacer spring, 15 busbar,
16 ··· Positioning hole, 17 ··· Fixed support base claw, 18 ·
・ Charging section cover, 19 ・ ・ Bus bar.

Claims (1)

(57)【実用新案登録請求の範囲】 平行な端板とその端板の基端部を連結する底板とから成
る平面コ字状の基板の前記底板中央部に、母線バーの第
１固定支持部材を設けると共に、底板の延長部上方及び
その延長部と反対側の前記端板の先端部外側上方に、支
柱を介して前記第１固定支持部材と同形状且つそれと同
じ向きの第２固定支持部材及び第３固定支持部材を夫々
設け、更に前記第２固定支持部材側の端板の先端部及び
前記第３固定支持部材側の底板端側部に、基板固定用の
長孔を夫々設け、前記固定支持部材が、断面コ字状の弾
性枠板の両端板先端部に内向きに対向する係止爪を夫々
設け、更に底板中央部に開口側へ向けて係止突起を垂設
し、その左右両側部に前記係止爪方向へ付勢する弾性部
材を夫々設けて成ることを特徴とする分電盤の充電部固
定支持台。(57) [Claims for Utility Model Registration] A first fixed support of a bus bar is provided at the center of the bottom plate of a flat U-shaped substrate comprising a parallel end plate and a bottom plate connecting the base ends of the end plates. A second fixed support having the same shape and the same orientation as the first fixed support member is provided above the extension of the bottom plate and above the outer end of the end plate on the side opposite to the extension by a column. A member and a third fixed support member, respectively, and further, a long hole for fixing a substrate is provided at a tip end portion of the end plate on the second fixed support member side and at a bottom plate end side portion on the third fixed support member side, respectively. The fixed support member is provided with a locking claw facing inward at both ends of the elastic frame plate having a U-shaped cross section, and further a locking projection is provided vertically toward the opening side at the center of the bottom plate, An elastic member for biasing in the direction of the locking claw is provided on each of the left and right sides thereof. Charging unit fixing support of the board.