JPH08290371A - Connecting structure of battery pack in electric tool - Google Patents
Connecting structure of battery pack in electric toolInfo
- Publication number
- JPH08290371A JPH08290371A JP8005209A JP520996A JPH08290371A JP H08290371 A JPH08290371 A JP H08290371A JP 8005209 A JP8005209 A JP 8005209A JP 520996 A JP520996 A JP 520996A JP H08290371 A JPH08290371 A JP H08290371A
- Authority
- JP
- Japan
- Prior art keywords
- battery pack
- battery
- terminal
- connection
- connection terminal
- 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.)
- Pending
Links
Landscapes
- Portable Power Tools In General (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、蓄電池を収納した
バッテリーパックと、そのバッテリーパックを着脱自在
に装着する電動工具側のバッテリーホルダとの接続構造
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a battery pack accommodating a storage battery and a battery holder on the side of an electric tool on which the battery pack is detachably mounted.
【0002】[0002]
【従来の技術】図10は従来の接続構造を示すもので、
複数の蓄電池(図示略)を収納したバッテリーパック4
0を、電動工具の2つ割のハンドルハウジング41,4
1で構成されるハンドル42の下部から装着させると、
バッテリーパック40がハンドル42内の所定の収納部
に納まると同時に、その上部に設けた正負の電極端子板
40a,40bが、ハンドル42側で固定されるバッテ
リーホルダ43の端子台44に突設された正負夫々のス
プリング端子45a,45bによって把持され、ここで
バッテリーパック40上部の把持と電気的接続とがなさ
れるものである。2. Description of the Related Art FIG. 10 shows a conventional connection structure.
Battery pack 4 containing multiple storage batteries (not shown)
0 is the handle housing 41, 4 of the electric tool
When mounted from the bottom of the handle 42 composed of 1,
At the same time as the battery pack 40 is accommodated in a predetermined storage portion in the handle 42, positive and negative electrode terminal plates 40a and 40b provided on the upper part thereof are projected on the terminal block 44 of the battery holder 43 fixed on the handle 42 side. The positive and negative spring terminals 45a and 45b hold the battery pack 40, and the upper part of the battery pack 40 is held and electrically connected.
【0003】[0003]
【発明が解決しようとする課題】上記バッテリーパック
の接続構造においては、スプリング端子45a,45b
と電極端子板40a,40bとの接触面積(通電容量)
が限られるものであるから、振動ドリルや電動ハンマー
等のモータが比較的大きな工具であると、前記スプリン
グ端子と電極端子板との間での接触抵抗が大きくなる。
特に上記振動工具では、接点部分でチャタリング(接点
同士のこすれや瞬間的な離反)が生じて接触不良を起こ
すことがあるため、接触抵抗はより増加し、結果発熱を
起こして前記電極端子板40a,40bが披着される合
成樹脂の端子ホルダが溶けたり、バッテリー側では蓄電
池の寿命を短くさせたりしてしまう。又電極端子板は、
スプリング端子と常に同じ箇所で接離するものであるか
ら、バッテリーパックの長期使用によってその接触面の
損傷が進み、これも接触不良に繋がるものとなってい
る。In the battery pack connection structure described above, the spring terminals 45a and 45b are provided.
Area of contact between the electrode terminal boards 40a and 40b (current carrying capacity)
However, if a motor such as a vibration drill or an electric hammer is a relatively large tool, the contact resistance between the spring terminal and the electrode terminal plate increases.
In particular, in the above vibrating tool, chattering (rubbing between contacts or momentary separation) may occur at the contact portion to cause a contact failure, so that the contact resistance further increases, and as a result, heat is generated to cause the electrode terminal plate 40a. , 40b are melted on the terminal holder made of synthetic resin, and the life of the storage battery is shortened on the battery side. Also, the electrode terminal board is
Since the spring terminal is always in contact with and separated from the same location, the contact surface of the battery pack is damaged due to long-term use of the battery pack, which also leads to poor contact.
【0004】[0004]
【課題を解決するための手段】そこで本発明は、上記の
ような接触不良がなく、簡単な構成で好適な接続状態を
維持できるバッテリーパックの接続構造を提供するもの
で、その構成は、前記バッテリーパックの接続面に差込
孔を設ける一方、前記バッテリーホルダに、前記差込孔
に対応して差し込み可能な接続端子を突設したことを特
徴とするものである。又前記接続端子を、前記差込孔へ
の差し込み時に少なくとも対向する2面方向へ拡開して
接圧を生じさせる膨出形状とするのが望ましい。又前記
差込孔を一対設けて夫々電極を備えると共に、前記接続
面に隣接する左右の外側面にも夫々電極を形成すること
ができる。又前記接続端子の膨出形状を、夫々重ね合わ
せた導電板を対称に折曲して形成することができる。又
前記接続端子の膨出形状を、夫々導電板をU字状に折曲
して形成することができる。又前記バッテリーホルダ
に、前記接続端子に沿って形成されて接続端子の折曲を
防止する突起を設けるのが望ましい。SUMMARY OF THE INVENTION Therefore, the present invention provides a battery pack connecting structure which does not have the above-mentioned contact failure and can maintain a suitable connected state with a simple structure. An insertion hole is provided on the connection surface of the battery pack, and a connection terminal that can be inserted in correspondence with the insertion hole is provided in the battery holder in a protruding manner. Further, it is preferable that the connection terminal has a bulging shape that expands in at least two opposing surface directions to generate a contact pressure when the connection terminal is inserted into the insertion hole. In addition, a pair of the insertion holes may be provided to include electrodes, and electrodes may be formed on the left and right outer surfaces adjacent to the connection surface. Further, the bulging shape of the connection terminal can be formed by symmetrically bending the conductive plates that are respectively superposed. Further, the bulging shape of the connection terminals can be formed by bending the conductive plates into a U shape. Further, it is preferable that the battery holder is provided with a protrusion that is formed along the connection terminal and that prevents the connection terminal from being bent.
【0005】[0005]
【発明の実施の形態】以下本発明の実施の形態を図面に
基いて説明する。図1において1は、複数の蓄電池(上
に2個、下に6個で計9.6V)を合成樹脂製の上下の
電池ケース2,3で収納してなるバッテリーパックで、
電池ケース2,3は溶着により一体化されている。この
バッテリーパック1には、その上方に、蓄電池のプラス
・マイナス夫々に接続される電極端子板11a,11b
と、内蔵したサーモスタットに接続されるサーモ端子板
12とを備えた接続部4が、下方に、電動工具の2つ割
のハンドルハウジング20,20の下端へ係止される一
対の装着部5,5と、ハンドルハウジング20へ設けら
れた後述するセットプレートが係止可能な係止部6と
が、夫々設けられている。前記接続部4は、図2にも示
すように上側の電池ケース2の短手方向両側面に形成さ
れ、接続面9側へも若干切欠いた一対の側孔7a,7b
と、接続面9に形成された一対の差込孔8a,8bと、
そして長手方向の一端側に設けた縦孔4aとから、電池
ケース2内で蓄電池1a,1a上方の端子ホルダ10に
設けた正負夫々の電極端子板11a,11bと、サーモ
端子板12とが夫々露出して構成されるもので、前記電
極端子板11a,11bは、双方とも1枚の導電板を、
端子ホルダ10の短手方向の側壁部10a,10bに披
着されるコ字状部13、水平部14、端子ホルダ10の
中央で長手方向に立設された絶縁壁10cに沿った垂直
部15、そして蓄電池との接点部16とに夫々折曲形成
したものである。よって電極端子板11a,11bは夫
々差込孔8a,8bから見ると、端子ホルダ10の側壁
部10a,10b側と絶縁壁10c側との2方向に露出
するものとなっている。尚8c,8cは、防塵のため各
差込孔8a,8bの短手方向に夫々垂下された垂下片で
ある。ちなみに上記接続面9には、側孔7aと差込孔8
a、側孔7bと差込孔8bとの間に接続面9の橋渡し部
ができる形となるから、この橋渡し部が、電極端子板1
1a,11bの上面側の完全露出を防止して、両電極が
容易に短絡しないようになっている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a battery pack in which a plurality of storage batteries (two above and six below, total 9.6 V) are housed in upper and lower battery cases 2 and 3 made of synthetic resin,
The battery cases 2 and 3 are integrated by welding. The battery pack 1 is provided with electrode terminal plates 11a and 11b, which are connected to the plus and minus sides of the storage battery, above the battery pack 1.
And a pair of mounting parts 5, which are connected to the lower end of the halved handle housing 20, 20 of the electric tool, below the connection part 4 including a thermo terminal plate 12 connected to a built-in thermostat. 5 and a locking portion 6 provided on the handle housing 20 and capable of locking a set plate described later are respectively provided. As shown in FIG. 2, the connecting portion 4 is formed on both side surfaces of the upper battery case 2 in the lateral direction, and a pair of side holes 7a and 7b are also cut out to the connecting surface 9 side.
And a pair of insertion holes 8a and 8b formed in the connection surface 9,
Then, from the vertical hole 4a provided on one end side in the longitudinal direction, the positive and negative electrode terminal plates 11a and 11b provided on the terminal holder 10 above the storage batteries 1a and 1a in the battery case 2 and the thermo terminal plate 12, respectively. The electrode terminal plates 11a and 11b are both exposed and are formed of a single conductive plate.
The U-shaped portion 13 worn on the lateral side walls 10a and 10b of the terminal holder 10 in the lateral direction, the horizontal portion 14, and the vertical portion 15 along the insulating wall 10c erected in the longitudinal direction at the center of the terminal holder 10. , And the contact portion 16 with the storage battery is bent. Therefore, when viewed from the insertion holes 8a and 8b, the electrode terminal plates 11a and 11b are exposed in two directions of the side wall portions 10a and 10b side of the terminal holder 10 and the insulating wall 10c side. Note that 8c and 8c are hanging pieces that are respectively hung in the lateral direction of the insertion holes 8a and 8b for dust prevention. By the way, the side surface 7a and the insertion hole 8 are formed in the connection surface 9.
a, since a bridging portion of the connecting surface 9 is formed between the side hole 7b and the insertion hole 8b, this bridging portion is the electrode terminal plate 1
The upper surfaces of the electrodes 1a and 11b are completely exposed to prevent both electrodes from being easily short-circuited.
【0006】一方上記バッテリーパック1の装着時に接
続される電動工具側のバッテリーホルダ22は、図1、
2のように、各ハンドルハウジング20内面に夫々形成
された受座21によって組付け状態で把持される合成樹
脂製の端子台23に、夫々正負のスプリング端子24
a,24bを一体に設けてなるもので、スプリング端子
24a,24bが、前記バッテリーパック1上面の差込
孔8a,8bから差し込まれて電気的接続される。各ス
プリング端子24a,24bは、細幅の導電板25a,
25bを中央で折曲げて重ね合わせ、折曲げ側を端子台
23の上方へ突出させて電動工具側のリード線との接続
に、端部側を、端子台23の下方で互いに離反方向へ折
曲げて、前記差込孔8a,8bの短手方向幅よりやや大
きめの幅で平行に垂下させ、最後に先端を、差込孔8
a,8bへの差し込みがしやすいように互いに相手側へ
円形状に折返して接触させて、左右対称な膨出形の挿入
部26a,26bを形成したものである。よってこのス
プリング端子24a,24bは、導電板25a,25b
の重ね合わせ方向に対して弾性を有するものとなってい
る。又前記端子台23の両側には、前記挿入部26a,
26bと平行に一対の突設部23a,23aが延設され
ている。On the other hand, the battery holder 22 on the electric tool side, which is connected when the battery pack 1 is mounted, is shown in FIG.
2, the positive and negative spring terminals 24 are attached to the synthetic resin terminal blocks 23 that are held in the assembled state by the seats 21 formed on the inner surface of each handle housing 20, respectively.
a and 24b are integrally provided, and the spring terminals 24a and 24b are inserted from the insertion holes 8a and 8b on the upper surface of the battery pack 1 to be electrically connected. Each spring terminal 24a, 24b is a thin conductive plate 25a,
25b is bent at the center and overlapped, and the bent side is projected above the terminal block 23 to connect with the lead wire on the electric tool side, and the end side is bent below the terminal block 23 in the direction away from each other. Bend it and hang it in parallel with a width slightly larger than the width in the lateral direction of the insertion holes 8a and 8b, and finally, tip the insertion holes 8a and 8b.
In order to make it easy to insert into a and 8b, they are circularly folded toward each other and brought into contact with each other to form bilaterally symmetrical bulging insertion portions 26a and 26b. Therefore, the spring terminals 24a and 24b are connected to the conductive plates 25a and 25b.
It has elasticity in the overlapping direction. On both sides of the terminal block 23, the insertion portions 26a,
A pair of projecting portions 23a, 23a extend in parallel with 26b.
【0007】以上の如く構成された接続構造において、
前記のようにバッテリーホルダ22を組み付けた電動工
具のハンドルハウジング20,20の下部から、上記バ
ッテリーパック1を挿入すると、図3,4の如く、電池
ケース3の左右の装着部5へ設けられ、板バネ17によ
って外方へ付勢されると共に、突起5a,5aによって
上方へ抜け止めされるフックボタン18のフック部18
aが、夫々ハンドルハウジング20の下縁で内方へおり
返した係止部20aに係止して、そのまま板バネ17の
付勢によって係止状態が維持される。このとき接続部4
においては、前記バッテリーホルダ22の両スプリング
端子24a,24bが、夫々差込孔8a,8bに差し込
まれ、挿入部26a,26bが、重ね合わせ方向に押圧
される状態で、各電極端子板11a,11bにおける夫
々のコ字状部13の内方側の面と垂直部15との間へ納
まるから、挿入部26a,26bはその弾性により拡開
方向へ接圧を生じさせて夫々電極端子板11a,11b
へ押し付けられ、電気的接続と共にバッテリーホルダ2
2とバッテリーパック1との一体化がなされることにな
る。又図3,4に示すように端子台23における前記突
設部23a,23aが、電池ケース2の接続面9に当接
してバッテリーホルダ22のがたつきを抑える作用も奏
するから、両者の一体化はより高まり、振動工具で振動
が加えられてもチャタリングが生じにくくなる。更に各
電極が夫々2方向の接触部を有するものとなるから、従
来より接触面積を広く確保でき、振動ドリル等の負荷の
大きい工具でも接触抵抗の影響を少なくすることができ
る。加えてこれらは、一枚板を折曲したスプリング端子
24a,24bと接点を一面増加させた電極端子板11
a,11b等の簡単な構造で達成可能となるから、コス
トの増加を抑えることもできる。一方バッテリーパック
1の電池ケース2には段部2aが形成されており、この
段部2aの4つの角が、装着状態で各ハンドルハウジン
グ20の内面に設けた一対の嵌合部20b,20bに夫
々合致するものともなっているので、ここでもバッテリ
ーパック1のがたつきを抑える作用が奏される。そして
本実施例のバッテリーパック1は、前述のように下側の
電池ケース3に係止部6が形成されているから、ハンド
ルハウジング20にセットプレート27が軸着されてい
る場合は、図4の如く、フックボタン18,18に代え
て、セットプレート27による装着が可能となってい
る。In the connection structure constructed as described above,
When the battery pack 1 is inserted from the lower part of the handle housing 20, 20 of the electric tool with the battery holder 22 assembled as described above, the battery pack 3 is provided on the left and right mounting portions 5 of the battery case 3 as shown in FIGS. The hook portion 18 of the hook button 18 is biased outward by the leaf spring 17 and is prevented from coming out upward by the projections 5a, 5a.
a engages with the engaging portions 20a that are inwardly returned at the lower edge of the handle housing 20, and the locked state is maintained by the biasing of the leaf spring 17 as it is. At this time, the connection part 4
In the above, the two spring terminals 24a and 24b of the battery holder 22 are inserted into the insertion holes 8a and 8b, respectively, and the insertion portions 26a and 26b are pressed in the stacking direction. Since it is housed between the inner surface of each U-shaped portion 13 in 11b and the vertical portion 15, the insertion portions 26a and 26b generate a contact pressure in the expanding direction due to the elasticity thereof and the electrode terminal plate 11a, respectively. , 11b
Battery holder 2 with electrical connection
2 and the battery pack 1 are integrated. Further, as shown in FIGS. 3 and 4, the projecting portions 23a, 23a of the terminal block 23 come into contact with the connecting surface 9 of the battery case 2 to suppress the rattling of the battery holder 22. Even if vibration is applied by the vibrating tool, chattering hardly occurs. Further, since each electrode has a contact portion in two directions, a contact area can be secured wider than in the past, and the influence of contact resistance can be reduced even with a tool having a large load such as a vibration drill. In addition, these are spring terminal 24a, 24b which bent one board, and the electrode terminal board 11 which increased the contact on one side.
Since this can be achieved with a simple structure such as a and 11b, an increase in cost can be suppressed. On the other hand, the battery case 2 of the battery pack 1 is formed with a step portion 2a, and four corners of the step portion 2a are fitted to a pair of fitting portions 20b, 20b provided on the inner surface of each handle housing 20 in the mounted state. Since they also match each other, the action of suppressing the rattling of the battery pack 1 is exerted here as well. In the battery pack 1 of this embodiment, since the lower battery case 3 has the engaging portion 6 formed as described above, when the set plate 27 is axially attached to the handle housing 20, as shown in FIG. As described above, the set button 27 can be attached instead of the hook buttons 18, 18.
【0008】尚上記実施の形態で説明したバッテリーパ
ック1は、上記差込孔8a,8bからの膨出形のスプリ
ング端子24a,24bの差込接続以外に、側孔7a,
7bによって従来の両サイド位置にも電極端子板11
a,11bが露出しているから、図10で示したような
従来の外側把持タイプのスプリング端子35a,35b
を備えた電動工具でも使用することができる。このよう
に従来型と本発明型の双方のバッテリーホルダ22や3
3へ用いることで、電極端子板11a,11bにおける
スプリング端子との接触面が、外方と内方とに使い分け
られることとなるから、接触面の損傷が少なく、接触抵
抗の増加を抑えることができる。又上記実施の形態では
スプリング端子24a,24bの挿入部26a,26b
を形成する導電板25a,25bの端部は分離させたも
のであるが、上記弾性の付与が可能であれば、導電板2
5a,25bの端部を繋げて膨出形状を形成させても差
し支えなく、膨出形状自体も、上記以外にも楕円形や長
円形、更には軸方向にスリットを設けた筒形等種々の形
状が採用でき、導電板25a,25bの両端部を互いの
相手側でなく離反方向側に折返しても良い。更に上記実
施例ではバッテリーホルダ1を9.6Vタイプのもので
説明したが、勿論容量や電池ケースの形状等も上記実施
例に限定するものではない。尚本実施の形態において
は、バッテリホルダの両スプリング端子が端子台に一体
に形成されているが、電動工具のスイッチに直接上記ス
プリング端子を延設してバッテリーホルダとスイッチと
を一体化させても良い。The battery pack 1 described in the above embodiment has the side hole 7a, in addition to the connection of the bulging spring terminals 24a, 24b from the insertion holes 8a, 8b.
7b allows the electrode terminal board 11 to be placed on both sides in the conventional manner.
Since a and 11b are exposed, the conventional outer grip type spring terminals 35a and 35b as shown in FIG.
It can also be used with a power tool equipped with. Thus, the battery holders 22 and 3 of both the conventional type and the present invention type
3, the contact surfaces of the electrode terminal plates 11a and 11b with the spring terminals can be used for the outside and the inside, so that the contact surfaces are less damaged and the increase in contact resistance can be suppressed. it can. Further, in the above embodiment, the insertion portions 26a, 26b of the spring terminals 24a, 24b are provided.
The end portions of the conductive plates 25a and 25b forming the conductive plate are separated from each other.
There is no problem even if the end portions of 5a and 25b are connected to each other to form a bulging shape. The bulging shape itself may be an elliptical shape, an oval shape, or a tubular shape having a slit in the axial direction, in addition to the above. A shape can be adopted, and both ends of the conductive plates 25a and 25b may be folded back toward the separating direction side instead of the other side. Further, in the above-mentioned embodiment, the battery holder 1 has been described as a 9.6V type, but of course the capacity and the shape of the battery case are not limited to those in the above-mentioned embodiment. In this embodiment, both spring terminals of the battery holder are formed integrally with the terminal block, but the spring terminals are directly extended to the switch of the electric tool to integrate the battery holder and the switch. Is also good.
【0009】次にスプリング端子の変更例を数例説明す
る。尚上述した図と同じ符号は同部品を示すため説明は
省略する。図5において正負のスプリング端子28a,
28bは、夫々一枚の導電板29a,29bを、端子台
23の下方で一度互いに中央寄りに折曲させ、下端部分
を差込孔8a,8bの短手方向幅よりやや大きめの幅で
U字状に折曲して、左右への膨出形状となる挿入部30
a,30bを形成したもので、スプリング端子28aと
28bとは夫々自由端が外側となる左右対称となってい
る。この形状においても、挿入部30a,30bが夫々
差込孔8a,8bに差し込まれると、その弾性により各
差込孔の短手方向に接圧を生じさせて夫々電極端子板1
1a,11bへ押し付けられ、電気的接続と共にバッテ
リーホルダ22とバッテリーパック1との一体化を図る
ことができる。又この形態においては、端子台23の中
央寄りの折曲部分をなくして図6のように、端子台23
から導電板29a,29bを真っ直ぐに垂下させ、U字
状の挿入部30a,30bのみを形成するようにしても
良く、更にこれらのU字状は、自由端が内側となる上記
と逆の左右対称に形成しても差し支えない。尚図6の場
合、端子台23には、導電板29a,29bに沿って形
成され、各挿入部30a,30bのU字状内に納まる幅
の突起31,31が突設されている。これはハンドルハ
ウジング20に誤って他のバッテリーを挿入した際など
に、スプリング端子28a,28bが折れ曲がって両者
が接触したり、U字状の自由端が内側へ倒れて弾性が低
下したりしないようにするためのもので、自由端が内側
にある場合は、図7のように両側の挿入部30a,30
bの自由端に沿って突出する突起32を1つ形成しても
良い。Next, several examples of changing the spring terminal will be described. Note that the same reference numerals as those in the above-mentioned drawings indicate the same parts, and thus the description thereof will be omitted. In FIG. 5, positive and negative spring terminals 28a,
28b bends one conductive plate 29a, 29b respectively toward the center once under the terminal block 23, and has a lower end portion with a width slightly larger than the width of the insertion holes 8a, 8b in the lateral direction. The insertion portion 30 that is bent in a letter shape and bulges to the left and right
a and 30b are formed, and the spring terminals 28a and 28b are bilaterally symmetrical with their free ends being outside. Even in this shape, when the insertion portions 30a and 30b are respectively inserted into the insertion holes 8a and 8b, the elasticity of the insertion portions 30a and 30b causes a contact pressure in the lateral direction of each insertion hole to cause the electrode terminal plate 1 to be inserted.
The battery holder 22 and the battery pack 1 can be integrated with each other by being pressed against 1a and 11b and electrically connected. Further, in this embodiment, the bent portion near the center of the terminal block 23 is eliminated, and as shown in FIG.
The conductive plates 29a and 29b may be hung straight from the above to form only the U-shaped insertion portions 30a and 30b. Further, these U-shaped portions have the left and right sides opposite to the above with the free end being the inner side. It can be formed symmetrically. In the case of FIG. 6, the terminal block 23 is provided with protrusions 31 and 31 formed along the conductive plates 29a and 29b and having a width that can be accommodated in the U-shape of the insertion portions 30a and 30b. This prevents the spring terminals 28a and 28b from bending and coming into contact with each other when the other battery is inserted into the handle housing 20 by mistake, and the U-shaped free end falls inward to reduce elasticity. If the free end is on the inner side, the insertion portions 30a, 30 on both sides as shown in FIG.
You may form the one protrusion 32 which protrudes along the free end of b.
【0010】一方図8のように、夫々2枚の導電板34
a,34bを差込孔8a,8bの短手方向幅よりやや大
きめの幅で端子台23から平行に垂下させ、各下端を互
いに相手側へ折曲して先細りの挿入部35a,35bを
形成したスプリング端子33a,33bを採用すること
もできる。この場合も図6,7のように、2枚の導電板
34a,34bの間に夫々端子台23から伸長する突起
31,31を介在させて導電板の折曲防止を、スプリン
グ端子33a,33bの間に突起32を突設して両端子
の短絡防止を図ると好適である。On the other hand, as shown in FIG. 8, two conductive plates 34 are provided.
a and 34b are hung from the terminal block 23 in parallel with a width slightly larger than the width of the insertion holes 8a and 8b in the lateral direction, and the respective lower ends are bent toward each other to form tapered insertion portions 35a and 35b. Alternatively, the spring terminals 33a and 33b may be used. Also in this case, as shown in FIGS. 6 and 7, the protrusions 31 and 31 extending from the terminal block 23 are interposed between the two conductive plates 34a and 34b, respectively, to prevent the conductive plates from being bent and the spring terminals 33a and 33b. It is preferable to provide a protrusion 32 between the terminals to prevent short circuit between both terminals.
【0011】尚上記実施の形態においては、図9のよう
に波形に折曲した導電板36a,36bを用いてU字状
等のスプリング端子を形成することもできる。これによ
れば、スプリング端子が多少折れ曲がったりしても電極
端子板との接触面積を安定して得ることができ、電気的
接続の信頼性が高くなる。又導電板は1枚でなく、複数
重ね合わせたもので夫々スプリング端子を形成しても良
い。更に上記では、バッテリーパックの装着と共に、蓄
電池側の正負の電極端子を電動工具のモータ側に電気的
接続する構造に採用する形態で説明したが、本発明はサ
ーモ端子等の他の電気的接続において採用することも可
能である。In the above embodiment, the U-shaped spring terminal can be formed by using the conductive plates 36a and 36b bent in a wave shape as shown in FIG. According to this, even if the spring terminal is bent to some extent, the contact area with the electrode terminal plate can be stably obtained, and the reliability of electrical connection is enhanced. Further, the spring terminals may be formed by stacking a plurality of conductive plates instead of one. Further, in the above description, the battery pack is mounted, and the positive and negative electrode terminals on the storage battery side are electrically connected to the motor side of the electric tool. However, the present invention is not limited to this. It is also possible to adopt.
【0012】[0012]
【発明の効果】以上本発明によれば、簡単な構造で、工
具側のバッテリーホルダとバッテリーパックとが好適に
一体化されることとなるから、振動工具等でのチャタリ
ングや接触抵抗の増加等の不具合がなく、良好な通電状
態でバッテリーを使用できる。勿論バッテリーの寿命へ
の影響も生じない。又前記接続端子を、前記差込孔への
差し込み時に少なくとも対向する2面方向へ拡開して接
圧を生じさせる膨出形状とすると、接続端子によってバ
ッテリーパックがよりしっかりと装着され、接点間の接
触面積も従来より大きく確保できる。又前記差込孔を一
対設けて夫々電極を備えると共に、前記接続面に隣接す
る左右の外側面にも夫々電極を形成すると、本発明のバ
ッテリーホルダを備えた電動工具に加え、従来の把持型
スプリング端子を備えたバッテリーホルダの電動工具に
も使用できることとなるから、両者の併用によって電極
と接続端子との接離面が分散され、電極側の損傷を極力
抑えることができる。又前記接続端子の膨出形状を、夫
々重ね合わせた導電板を対称に折曲して形成すると、上
記接続端子が簡単な加工で構成できる。又前記接続端子
の膨出形状を、夫々導電板をU字状に折曲して形成する
と、より加工が簡略化する。又前記バッテリーホルダ
に、前記接続端子に沿って形成されて接続端子の折曲を
防止する突起を設けると、バッテリーパックの誤装着等
があっても接続端子の折曲や短絡を効果的に防止でき
る。As described above, according to the present invention, since the battery holder and the battery pack on the tool side are preferably integrated with a simple structure, chattering and an increase in contact resistance in a vibrating tool or the like. There is no problem of, and the battery can be used in a good energized state. Of course, the battery life is not affected. Further, when the connection terminal is formed into a bulging shape that expands in at least two opposing directions when inserting into the insertion hole to generate a contact pressure, the battery pack is more firmly attached by the connection terminal, A larger contact area can be secured than in the past. Further, when a pair of the insertion holes are provided and electrodes are provided respectively, and electrodes are also formed on the left and right outer surfaces adjacent to the connection surface, respectively, in addition to the electric tool having the battery holder of the present invention, the conventional grip type Since it can also be used in an electric tool for a battery holder having a spring terminal, the contact and separation surfaces of the electrode and the connection terminal are dispersed by using both of them together, and damage to the electrode side can be suppressed as much as possible. If the bulging shape of the connection terminal is formed by symmetrically bending the superposed conductive plates, the connection terminal can be formed by simple processing. Further, when the bulging shape of the connection terminal is formed by bending the conductive plate into a U shape, the processing is further simplified. Further, when the battery holder is provided with a protrusion formed along the connection terminal to prevent the connection terminal from being bent, the connection terminal can be effectively prevented from being bent or short-circuited even if the battery pack is erroneously installed. it can.
【図1】バッテリーパックとハンドルハウジングの説明
図である。FIG. 1 is an explanatory diagram of a battery pack and a handle housing.
【図2】接続部の分解斜視図である。FIG. 2 is an exploded perspective view of a connecting portion.
【図3】バッテリーパックとバッテリーホルダとの接続
構造を示す説明図である。FIG. 3 is an explanatory diagram showing a connection structure between a battery pack and a battery holder.
【図4】バッテリーパックとバッテリーホルダとの接続
構造を示す説明図である。FIG. 4 is an explanatory diagram showing a connection structure between a battery pack and a battery holder.
【図5】スプリング端子の変更例を示す説明図である。FIG. 5 is an explanatory diagram showing a modified example of a spring terminal.
【図6】スプリング端子の変更例を示す説明図である。FIG. 6 is an explanatory diagram showing a modified example of a spring terminal.
【図7】スプリング端子の変更例を示す説明図である。FIG. 7 is an explanatory diagram showing a modified example of a spring terminal.
【図8】スプリング端子の変更例を示す説明図である。FIG. 8 is an explanatory diagram showing a modified example of a spring terminal.
【図9】スプリング端子の変更例を示す説明図である。FIG. 9 is an explanatory diagram showing a modified example of a spring terminal.
【図10】従来のバッテリーパックの接続構造を示す説
明図である。FIG. 10 is an explanatory view showing a connection structure of a conventional battery pack.
1・・バッテリーパック、2,3・・電池ケース、4・
・接続部、5・・装着部、6・・係止部、7a,7b・
・側孔、8a,8b・・差込孔、9・・接続面、10・
・端子ホルダ、11a,11b・・電極端子板、12・
・サーモ端子板、20・・ハンドルハウジング、22・
・バッテリーホルダ、23・・端子台、24a,24b
・・スプリング端子、26a,26b・・挿入部。1 ... Battery pack, 2, 3 ... Battery case, 4 ...
・ Connecting parts, 5 ・ ・ Mounting parts, 6 ・ ・ Locking parts, 7a, 7b ・
・ Side holes, 8a, 8b ・ ・ Insertion holes, 9 ・ ・ Connecting surface, 10 ・
・ Terminal holders, 11a, 11b ・ ・ Electrode terminal plates, 12 ・
・ Thermo terminal board, 20 ・ ・ Handle housing, 22 ・
.Battery holders, 23 .. Terminal blocks, 24a, 24b
..Spring terminals, 26a, 26b ...
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加藤 陽一 愛知県安城市住吉町3丁目11番8号 株式 会社マキタ内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichi Kato 3-11-8 Sumiyoshi-cho, Anjo City, Aichi Prefecture Makita Co., Ltd.
Claims (6)
池を収納したバッテリーパックを装着し、それらを互い
に電気的接続するバッテリーパックの接続構造におい
て、 前記バッテリーパックの接続面に差込孔を設ける一方、
前記バッテリーホルダに、前記差込孔に対応して差し込
み可能な接続端子を突設したことを特徴とする電動工具
におけるバッテリーパックの接続構造。1. A battery pack connecting structure in which a battery pack accommodating a storage battery is mounted on a battery holder provided on a tool side and electrically connected to each other, wherein an insertion hole is provided on a connecting surface of the battery pack. ,
A connection structure for a battery pack in an electric power tool, wherein a connection terminal that can be inserted corresponding to the insertion hole is provided on the battery holder.
み時に少なくとも対向する2面方向へ拡開して接圧を生
じさせる膨出形状とした請求項1に記載の電動工具にお
けるバッテリーパックの接続構造。2. The battery pack for a power tool according to claim 1, wherein the connection terminal has a bulging shape that expands in at least two opposing surface directions to generate a contact pressure when the connection terminal is inserted into the insertion hole. Connection structure.
ると共に、前記接続面に隣接する左右の外側面にも夫々
電極を形成した請求項1又は請求項2に記載の電動工具
におけるバッテリーパックの接続構造。3. The battery for an electric power tool according to claim 1, wherein the pair of insertion holes are provided with electrodes, and the left and right outer surfaces adjacent to the connection surface are also provided with electrodes. Connection structure of the pack.
わせた導電板を対称に折曲して形成したものである請求
項2又は請求項3に記載の電動工具におけるバッテリー
パックの接続構造。4. The connection structure for a battery pack in an electric power tool according to claim 2, wherein the bulging shape of the connection terminal is formed by symmetrically bending conductive plates that are superposed on each other. .
をU字状に折曲して形成したものである請求項2又は請
求項3に記載の電動工具におけるバッテリーパックの接
続構造。5. The connection structure for a battery pack in an electric power tool according to claim 2, wherein the bulging shape of the connection terminal is formed by bending a conductive plate into a U shape.
に沿って形成され接続端子の折曲を防止する突起を設け
た請求項1乃至請求項5の何れかに記載の電動工具にお
けるバッテリーパックの接続構造。6. The battery pack connection in the electric power tool according to claim 1, wherein the battery holder is provided with a protrusion formed along the connection terminal to prevent the connection terminal from being bent. Construction.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8005209A JPH08290371A (en) | 1995-02-23 | 1996-01-16 | Connecting structure of battery pack in electric tool |
EP96301204A EP0734083B1 (en) | 1995-02-23 | 1996-02-22 | Attachment structure of battery pack to power-driven tools |
DE69605344T DE69605344T2 (en) | 1995-02-23 | 1996-02-22 | Arrangement for attaching a battery pack to electrical devices |
US08/604,869 US5769657A (en) | 1995-02-23 | 1996-02-22 | Attachment structure of battery pack to power-driven tools |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7-35745 | 1995-02-23 | ||
JP3574595 | 1995-02-23 | ||
JP8005209A JPH08290371A (en) | 1995-02-23 | 1996-01-16 | Connecting structure of battery pack in electric tool |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08290371A true JPH08290371A (en) | 1996-11-05 |
Family
ID=26339115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8005209A Pending JPH08290371A (en) | 1995-02-23 | 1996-01-16 | Connecting structure of battery pack in electric tool |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08290371A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000061868A (en) * | 1998-08-13 | 2000-02-29 | Black & Decker Inc | Cordless power tool system |
JP2001179661A (en) * | 1999-12-28 | 2001-07-03 | Hitachi Koki Co Ltd | Portable power tool of battery type |
DE19933015B4 (en) * | 1998-08-14 | 2004-01-15 | S-B Power Tool Company, Broadview | Snap mechanism for attaching a battery pack to a battery powered power tool |
JP2005192330A (en) * | 2003-12-25 | 2005-07-14 | Max Co Ltd | Battery pack for power tool |
CN1308120C (en) * | 2003-02-07 | 2007-04-04 | 株式会社牧田 | Mounting structure of hook of rechargeable electric tool |
JP2011235376A (en) * | 2010-05-07 | 2011-11-24 | Makita Corp | Grinder |
-
1996
- 1996-01-16 JP JP8005209A patent/JPH08290371A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000061868A (en) * | 1998-08-13 | 2000-02-29 | Black & Decker Inc | Cordless power tool system |
DE19933015B4 (en) * | 1998-08-14 | 2004-01-15 | S-B Power Tool Company, Broadview | Snap mechanism for attaching a battery pack to a battery powered power tool |
JP2001179661A (en) * | 1999-12-28 | 2001-07-03 | Hitachi Koki Co Ltd | Portable power tool of battery type |
CN1308120C (en) * | 2003-02-07 | 2007-04-04 | 株式会社牧田 | Mounting structure of hook of rechargeable electric tool |
JP2005192330A (en) * | 2003-12-25 | 2005-07-14 | Max Co Ltd | Battery pack for power tool |
JP2011235376A (en) * | 2010-05-07 | 2011-11-24 | Makita Corp | Grinder |
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