JP2009196024A - Power tool - Google Patents

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Publication number
JP2009196024A
JP2009196024A JP2008039051A JP2008039051A JP2009196024A JP 2009196024 A JP2009196024 A JP 2009196024A JP 2008039051 A JP2008039051 A JP 2008039051A JP 2008039051 A JP2008039051 A JP 2008039051A JP 2009196024 A JP2009196024 A JP 2009196024A
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Prior art keywords
substrate
battery pack
motor
control circuit
communication connector
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JP2008039051A
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JP5086835B2 (en
Inventor
Hiroshi Iwano
洋 岩野
Naotake Tanaka
尚武 田中
Masaki Ikeda
昌樹 池田
Atsumasa Kubota
篤優 久保田
Masaaki Okada
昌彰 岡田
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Panasonic Electric Works Co Ltd
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Panasonic Electric Works Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power tool hard to have an electric corrosion in a control circuit and easily manufacturable. <P>SOLUTION: This power tool 1 includes: its body; and a battery pack 20 detachably attached to the lower section of the body. The body of the power tool 1 includes: a motor 2 serving as a power source; a drive part 3, a trigger switch 4; a main switch 5 for turning ON/OFF the power supply of the motor 2; and a circuit part 10 having a control circuit for controlling the supply of the power to the motor 2. The circuit part 10 includes two substrates, i.e., a first substrate 6 and a second substrate 7 which are separated from each other and connected to each other through a first lead 11. The first substrate 6 is installed in a case 6a, and disposed in a grip part 110 together with the case 6a. The second substrate 7 having a communication connector 8 connected to a battery pack 20 is disposed under the grip part 110. Even if water is collected to the underside of the grip part 110, the control circuit on the first substrate 6 is not electrically corroded. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、着脱可能な電池パックを有する電動工具に関する。   The present invention relates to an electric tool having a detachable battery pack.

従来より、本体に着脱可能な電池パックを用いた、いわゆるコードレス型の電動工具が用いられている（例えば、特許文献１参照）。図６は、本体下部に電池パックを有する電動工具の一例を示す。このような電動工具８１は、本体上部に比較的重い部材であるモータやモータに駆動される駆動部等を有している。そこで、重量物である電池パック８２０を下方に配置して重心位置をハウジング８００のグリップ部８１０に近づけ、より取り扱いやすいように構成されている。電動工具８１のハウジング８００の内部には、制御回路を有し、電池パック８２０に接続される通信コネクタ８８が設けられた制御基板８０を備えている。図７は、制御基板８０の一例を示す。制御基板８０は、通信コネクタ８８が電池パック８２０に接続可能でなければならないため、ハウジング８００の下部に配置されている。電池パック８２０を電動工具８１に装着しているときには、制御回路により、通信コネクタ８８を介して検知された電池パック８２０の状態に基づいた制御が行われる。すなわち、制御回路には、電池パック８２０の温度や電圧等の情報が通信コネクタ８８を通じて送られる。そして、制御回路は、電池パック８２０、スイッチ、モータ、ＦＥＴ等で構成される電源回路において、ＦＥＴを開閉する制御を行うことにより、モータを駆動させたり、電池の充電等を制御する。これにより、電池パック８２０に対する過度の負荷を避けることができ、電池パック８２０の寿命が長くなる。   Conventionally, a so-called cordless type electric tool using a battery pack that can be attached to and detached from a main body has been used (see, for example, Patent Document 1). FIG. 6 shows an example of an electric tool having a battery pack at the bottom of the main body. Such an electric tool 81 has a motor, which is a relatively heavy member, a driving unit driven by the motor, and the like at the upper part of the main body. In view of this, the battery pack 820, which is a heavy object, is disposed below and the position of the center of gravity is brought closer to the grip portion 810 of the housing 800 so that it can be easily handled. Inside the housing 800 of the power tool 81, a control board 80 having a control circuit and provided with a communication connector 88 connected to the battery pack 820 is provided. FIG. 7 shows an example of the control board 80. The control board 80 is disposed at the bottom of the housing 800 because the communication connector 88 must be connectable to the battery pack 820. When the battery pack 820 is attached to the electric tool 81, the control circuit performs control based on the state of the battery pack 820 detected via the communication connector 88. That is, information such as the temperature and voltage of the battery pack 820 is sent to the control circuit through the communication connector 88. The control circuit controls the opening and closing of the FET in the power supply circuit including the battery pack 820, the switch, the motor, the FET, and the like, thereby driving the motor and controlling the charging of the battery. Thereby, an excessive load on the battery pack 820 can be avoided, and the life of the battery pack 820 is prolonged.

ところで、このような電動工具８１は、屋外等でも使用される場合がある。屋外等での使用時には、冷却用の風穴やスイッチ等の操作部等の隙間から水滴等が侵入し、電動工具８１本体のハウジング８００の内部に溜まることがある。ハウジング８００の内部に侵入した水滴等は、特に電動工具８１の本体の下部に溜まりやすい。電動工具８１の本体の下部には、異物侵入防止のため開口部等は設けられておらず、溜まった水は、蒸発するほか、ほとんど外部に排出されることがない。このように本体の下部に水が溜まると、その本体下部に配置された制御基板８０の制御回路が電蝕され、動作不良が発生することがある。制御回路が動作不良となると、電池パック８２０の制御が行われず、電池パック８２０が壊れることがある。このような動作不良の発生を防止するには、制御基板８０を、比較的水はけや風通しのよい部位に配置することが考えられる。しかしながら、制御基板８０上の通信コネクタ８８には、電池パック８２０を接続する必要があるため、このように電池パック８２０が本体下部に位置する場合には、制御基板８０を他の位置に配置することはできない。   By the way, such an electric tool 81 may be used also outdoors. When used outdoors or the like, water droplets or the like may enter through gaps such as cooling air holes or switches and other operation portions, and may accumulate in the housing 800 of the power tool 81 body. Water droplets or the like that have entered the inside of the housing 800 tend to accumulate particularly in the lower part of the main body of the power tool 81. An opening or the like is not provided in the lower part of the main body of the electric power tool 81 to prevent foreign matter from entering, and the accumulated water is evaporated and hardly discharged to the outside. If water accumulates in the lower part of the main body in this way, the control circuit of the control board 80 disposed in the lower part of the main body may be electroeroded and malfunction may occur. When the control circuit malfunctions, the battery pack 820 is not controlled and the battery pack 820 may be broken. In order to prevent the occurrence of such a malfunction, it is conceivable to dispose the control board 80 in a relatively well drained or well ventilated area. However, since it is necessary to connect the battery pack 820 to the communication connector 88 on the control board 80, when the battery pack 820 is located at the lower part of the main body as described above, the control board 80 is disposed at another position. It is not possible.

ここで、このような制御回路電蝕を防止する方法としては、絶縁物により制御基板８０をコーティングすることも考えられる。図７（ｂ）は、制御基板８０上の制御回路を覆うようにコーティングが施された防水処理部８０ｃを有する制御基板８０を示す。コーティングは、制御基板８０がほぼ完全に覆われるように施される必要がある。制御回路を部分的にコーティングしても、コーティングの隙間から基板内部に水分が侵入し電触が発生することがあるためである。しかしながら、通信コネクタ８８や電子部品等が配置されている制御基板８０を完全にコーティングする作業は、接触不良を防止するために通信コネクタ８８等の導電部に絶縁物が付着しないようにして行う必要があり、困難である。この問題は、特に、電動工具８１が、いわゆるインパクトドライバ等の振動工具である場合に顕著である。すなわち、この場合、通信コネクタ８８同士の結合の信頼性を向上させるため、通信コネクタを可動式にする必要があるが、この場合には、通信コネクタ８８の導電部のマスキングと可動部のマスキングの両方を行ったうえでコーティングを行う必要があり、より困難で煩雑な作業が必要となる。
特開２００６‐２７２４８５号公報 Here, as a method of preventing such control circuit electrolytic corrosion, it is conceivable to coat the control substrate 80 with an insulator. FIG. 7B shows a control board 80 having a waterproofing processing unit 80 c coated so as to cover the control circuit on the control board 80. The coating needs to be applied so that the control substrate 80 is almost completely covered. This is because even if the control circuit is partially coated, moisture may enter the substrate through gaps in the coating and electric contact may occur. However, the work of completely coating the control board 80 on which the communication connector 88 and the electronic components are arranged needs to be performed so that the insulating material does not adhere to the conductive parts such as the communication connector 88 in order to prevent poor contact. It is difficult. This problem is particularly noticeable when the power tool 81 is a vibration tool such as a so-called impact driver. That is, in this case, in order to improve the reliability of the coupling between the communication connectors 88, it is necessary to make the communication connector movable. In this case, the masking of the conductive portion of the communication connector 88 and the masking of the movable portion are required. It is necessary to perform coating after performing both, which requires more difficult and cumbersome work.
JP 2006-272485 A

本発明は、上記問題点を鑑みてなされたものであり、制御回路の電蝕がより発生しにくく容易に製造可能な信頼性の高い電動工具を提供することを目的とする。   The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a highly reliable electric tool that is less likely to cause electric corrosion of a control circuit and can be easily manufactured.

上記目的を達成するため、請求項１の発明は、動力源であるモータと、前記モータにより駆動される駆動部と、前記モータの電源をＯＮ／ＯＦＦするために操作されるトリガスイッチと、前記モータに電力を供給する電池パックと、前記電池パックに設けられた接続コネクタと結合可能な通信コネクタを有し、前記電池パックから前記モータヘの電源供給を制御する制御回路を有する回路部と、ユーザが把持可能なグリップ部を有し、前記モータ、駆動回路部、及び回路部を収納するハウジングとを備え、前記電池パックは、前記グリップ部の下部に着脱可能に装着されており、電動工具本体への装着時に、前記接続コネクタと前記通信コネクタとが接続されるように構成されている電動工具において、前記回路部は、前記制御回路が設けられた第１基板と、前記通信コネクタが設けられ、前記第１基板とは分離されて前記制御回路に接続されている第２基板とを有しており、前記第１基板は、前記グリップ部の内部に配置されており、前記第２基板は、前記グリップ部の下部に配置されているものである。   In order to achieve the above object, the invention of claim 1 is directed to a motor as a power source, a drive unit driven by the motor, a trigger switch operated to turn on / off the power of the motor, A battery pack that supplies power to the motor, a communication connector that can be coupled to a connection connector provided in the battery pack, and a circuit unit that includes a control circuit that controls power supply from the battery pack to the motor; and a user The battery pack is detachably attached to a lower portion of the grip portion, and includes an electric tool main body. In the electric tool configured to connect the connection connector and the communication connector at the time of mounting to the circuit, the circuit unit is provided with the control circuit. A first board and a second board provided with the communication connector and separated from the first board and connected to the control circuit, wherein the first board is connected to the grip portion. Arranged inside, the second substrate is arranged below the grip portion.

請求項２の発明は、請求項１の発明において、前記第２基板の導通部は、絶縁剤によりコーティングされているものである。   According to a second aspect of the present invention, in the first aspect of the present invention, the conductive portion of the second substrate is coated with an insulating agent.

請求項３の発明は、請求項１又は請求項２に記載の発明において前記通信コネクタは、前記第２基板に対し変位可能な可動式コネクタであるものである。   According to a third aspect of the present invention, in the first or second aspect of the present invention, the communication connector is a movable connector that can be displaced with respect to the second substrate.

請求項１の発明によれば、制御回路が設けられた第１基板と通信コネクタが設けられた第２基板とが分離されており、第１基板がグリップ部の内部に配置されているので、ハウジングの内部に水が侵入しても第１基板上の制御回路が電蝕されにくい。従って、困難な作業である制御回路のコーティングを行うことなく、制御回路の電蝕が発生しにくく信頼性が高い電動工具を容易に製造することができる。   According to the first aspect of the present invention, the first substrate provided with the control circuit and the second substrate provided with the communication connector are separated, and the first substrate is disposed inside the grip portion. Even if water enters the inside of the housing, the control circuit on the first substrate is not easily eroded. Therefore, it is possible to easily manufacture a highly reliable power tool that is difficult to cause electric corrosion of the control circuit without coating the control circuit, which is a difficult operation.

請求項２の発明によれば、ハウジングの内部に侵入した水に第２基板が晒されても、その水と第２基板の導通部が接触しないので、より制御回路が確実に動作するようにすることができる。   According to the invention of claim 2, even if the second substrate is exposed to the water that has entered the inside of the housing, the water and the conductive portion of the second substrate do not contact each other, so that the control circuit operates more reliably. can do.

請求項３の発明によれば、上述と同様に、困難なコーティング作業を行うことなく、制御回路の電蝕が発生しにくく、可動式の通信コネクタを用いて耐振動性を向上させた電動工具を、容易に製造することができる。   According to the invention of claim 3, similar to the above, the electric tool which is less likely to cause electrolytic corrosion of the control circuit without performing a difficult coating operation, and has improved vibration resistance using a movable communication connector. Can be easily manufactured.

以下、本発明の第１実施形態について図面を参照して説明する。図１及び図２は、本実施形態に係る電動工具の一例を示す。電動工具１は、いわゆるコードレス式インパクトドライバであり、後述するような電池パック２０内の電池２１を電源として動作し、商用電源が近くにないような場所でも使用可能なものである。電動工具１は、大まかに、ハウジング１００に覆われた電動工具１の本体と、その下部に着脱可能に装着された電池パック２０とを有している。ハウジング１００は、下方にユーザが把持しやすいように形成されたグリップ部１１０を有している。ハウジング１００の上部には、後述するようなモータ２等の重量物が配置されているので、電池パック２０は、そのグリップ部１１０の下方に着脱可能に配置され、電動工具１の重心の位置が偏らないようにされている。電池パック２０の上部には、後述するように、電動工具１の本体側の通信コネクタ８に接続される接続コネクタ２２と、電池２１の電力を電動工具１の本体に供給するための電源端子（図示せず）が配置されている。   Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG.1 and FIG.2 shows an example of the electric tool which concerns on this embodiment. The power tool 1 is a so-called cordless impact driver, which operates using a battery 21 in a battery pack 20 as described later as a power source, and can be used even in a place where a commercial power source is not nearby. The electric power tool 1 roughly includes a main body of the electric power tool 1 covered with a housing 100 and a battery pack 20 that is detachably attached to a lower part thereof. The housing 100 has a grip portion 110 formed so as to be easily gripped by the user below. Since a heavy object such as a motor 2 as will be described later is disposed on the upper portion of the housing 100, the battery pack 20 is detachably disposed below the grip portion 110, and the position of the center of gravity of the electric power tool 1 is determined. It is designed not to be biased. On the upper part of the battery pack 20, as will be described later, a connection connector 22 connected to the communication connector 8 on the main body side of the electric power tool 1, and a power supply terminal for supplying electric power of the battery 21 to the main body of the electric power tool 1 ( (Not shown) is arranged.

電動工具１の本体は、動力源となるモータ２と、モータ２により駆動される駆動部３と、ハウジング１００から外部に露出するように配置されたトリガスイッチ４と、トリガスイッチ４の操作に応じてモータ２の電源をＯＮ／ＯＦＦさせるメインスイッチ５と、メインスイッチ５に接続されており、モータ２への電源供給を制御する制御回路を有する回路部１０とを備えている。駆動部３は、モータ２の回動に伴い、衝撃を発生させつつ回動するインパクト発生機構を有している。メインスイッチ５は、電源端子５ａとモータ２に接続されたＦＥＴ（field-effect transistor）５ｂに接続されている。電源端子５ａは、ハウジング１００の電池パック２０が取り付けられる部位に露出するように設けられており、当該部位に取り付けられた電池パック２０の電源端子に接触可能に配置されている。ＦＥＴ５ｂは、メインスイッチ５からの電気信号に応じて、電源端子５ａを介して電池パック２０からの電力をモータ２に供給し、モータ２を駆動させる。   The main body of the electric power tool 1 includes a motor 2 as a power source, a drive unit 3 driven by the motor 2, a trigger switch 4 disposed so as to be exposed from the housing 100, and an operation of the trigger switch 4. The main switch 5 for turning on / off the power of the motor 2 and the circuit unit 10 connected to the main switch 5 and having a control circuit for controlling the power supply to the motor 2 are provided. The drive unit 3 has an impact generating mechanism that rotates while generating an impact as the motor 2 rotates. The main switch 5 is connected to a power supply terminal 5 a and an FET (field-effect transistor) 5 b connected to the motor 2. The power supply terminal 5a is provided so as to be exposed at a part of the housing 100 where the battery pack 20 is attached, and is arranged so as to be able to contact the power supply terminal of the battery pack 20 attached to the part. The FET 5b supplies the electric power from the battery pack 20 to the motor 2 via the power supply terminal 5a in accordance with the electric signal from the main switch 5, and drives the motor 2.

図３は、回路部１０を示す。本実施形態において、回路部１０は、互いに分離された第１基板６及び第２基板７の２つの基板と、第１基板６にリード線を介して接続されモータ２の駆動時に点灯するＬＥＤ１３とを有している。第１基板６は、第１基板６と略同じ大きさのケース６ａ内に取り付けられており、グリップ部１１０の内部に配置されている。また、第２基板７は、グリップ部１１０の下方の電池パック２０が装着される部位の近傍に配置されている。第１基板６の下部には、６本のリード線を有する第１リード線１１が接続されている。第１リード線１１の先端部には６極のオスコネクタ１１ｂが取り付けられている。このオスコネクタ１１ｂは、第２基板７上に設けられたメスコネクタ７ａに接続されている。また、第１基板６の上部には、３極のリード線を有する第２リード線１２が接続されている。第２リード線１２は、図２に示すように、ケース６ａの裏面で、コネクタ１２ａを介し、メインスイッチ５に接続されたリード線に接続されている。第１基板６が取り付けられたケース６ａは、図１に示すように、グリップ部１１０の内部に配置されている。   FIG. 3 shows the circuit unit 10. In the present embodiment, the circuit unit 10 includes two substrates, a first substrate 6 and a second substrate 7 that are separated from each other, and an LED 13 that is connected to the first substrate 6 via a lead wire and lights when the motor 2 is driven. have. The first substrate 6 is mounted in a case 6 a having approximately the same size as the first substrate 6 and is disposed inside the grip portion 110. Further, the second substrate 7 is disposed in the vicinity of a portion where the battery pack 20 below the grip portion 110 is mounted. A first lead wire 11 having six lead wires is connected to the lower portion of the first substrate 6. A 6-pole male connector 11 b is attached to the tip of the first lead wire 11. This male connector 11 b is connected to a female connector 7 a provided on the second substrate 7. A second lead wire 12 having a tripolar lead wire is connected to the upper portion of the first substrate 6. As shown in FIG. 2, the second lead wire 12 is connected to the lead wire connected to the main switch 5 via the connector 12a on the back surface of the case 6a. The case 6a to which the first substrate 6 is attached is disposed inside the grip portion 110 as shown in FIG.

図４は第２基板７を示す。第２基板７の上面には、第１リード線１１のオスコネクタ１１ｂが挿入されるメスコネクタ７ａが配置されている。また、第２基板７の下面には、グリップ部１１０の下方から露出し、ハウジング１００の下部に装着される電池パック２０に向け突出するように配置された通信コネクタ８が設けられている。通信コネクタ８は、例えば、前面に端子面８ａが露出するように配置されている。通信コネクタ８は、例えば樹脂成型により形成されており、それ自体は防水性を備えている。通信コネクタ８は、その上部の端子部８ｂが第２基板７を貫通して第２基板７の上面に設けられているランドに導通するように、第２基板７に実装されている。電池パック２０がハウジング１００の下部に装着されると、電池パック２０の接続コネクタ２２の端子部（図示せず）が端子面８ａに接触し、接続コネクタ２２と通信コネクタ８とが接続される。本実施形態において、通信コネクタ８は、前後方向（図の矢印方向）に僅かにスライド可能であって、内蔵するばね（図示せず）により常に前方に向け付勢されている、いわゆる可動式コネクタである。電池パック２０がハウジング１００の下部に装着された状態では、通信コネクタ８は、ハウジング１００に電池パック２０が装着されていない状態よりも少し後方にスライドした状態で、電池パック２０の接続コネクタ２２に接続される。これにより、この電動工具１の使用時に、駆動部３のインパクト発生機構により電動工具１が振動しても、通信コネクタ８の端子面８ａと電池パック２０の接続コネクタ２２の端子部との良好な接触状態が保たれる。また、電池パック２０の接続時に通信コネクタ８が若干スライドして接続コネクタ２２と接続するので、電池パック２０の着脱を繰り返しても、通信コネクタ８の端子面８ａや接続コネクタ２２の端子部が摩耗しにくく、電動工具１の耐久性を向上させることができる。   FIG. 4 shows the second substrate 7. A female connector 7 a into which the male connector 11 b of the first lead wire 11 is inserted is disposed on the upper surface of the second substrate 7. In addition, a communication connector 8 is provided on the lower surface of the second substrate 7 so as to be exposed from below the grip portion 110 and to protrude toward the battery pack 20 attached to the lower portion of the housing 100. For example, the communication connector 8 is arranged so that the terminal surface 8a is exposed on the front surface. The communication connector 8 is formed by resin molding, for example, and has a waterproof property. The communication connector 8 is mounted on the second substrate 7 so that the upper terminal portion 8b penetrates the second substrate 7 and is electrically connected to a land provided on the upper surface of the second substrate 7. When the battery pack 20 is attached to the lower part of the housing 100, the terminal portion (not shown) of the connection connector 22 of the battery pack 20 contacts the terminal surface 8a, and the connection connector 22 and the communication connector 8 are connected. In the present embodiment, the communication connector 8 is a so-called movable connector that is slightly slidable in the front-rear direction (the arrow direction in the figure) and is always biased forward by a built-in spring (not shown). It is. In a state where the battery pack 20 is attached to the lower part of the housing 100, the communication connector 8 is slid slightly rearward from a state where the battery pack 20 is not attached to the housing 100, and is connected to the connection connector 22 of the battery pack 20. Connected. Thereby, when this electric power tool 1 is used, even if the electric power tool 1 is vibrated by the impact generating mechanism of the drive unit 3, the terminal surface 8a of the communication connector 8 and the terminal part of the connection connector 22 of the battery pack 20 are excellent. Contact is maintained. Further, when the battery pack 20 is connected, the communication connector 8 is slightly slid to connect to the connection connector 22, so that the terminal surface 8 a of the communication connector 8 and the terminal portion of the connection connector 22 are worn even when the battery pack 20 is repeatedly attached and detached. The durability of the electric power tool 1 can be improved.

この電動工具１では、第１基板６は、第１リード線１１を介して第２基板７に接続されているので、電池パック２０がハウジング１００に装着されている状態で、第１基板６の制御回路は、電池パック２０の温度や電池２１の残容量等の電池情報を第２基板７の通信コネクタ８を介して検知することができる。制御回路は、その電池情報に基づき、電池パック２０、メインスイッチ５、モータ２、ＦＥＴ５ｂ等で構成される電源回路においてＦＥＴ５ｂの制御を行いモータ２を流れる電流の制御を行ったり、電池パック２０の電池２１の充電の制御を行う。これにより、電池パック２０に対する過度の負荷を避けることができ、電池パック２０の寿命を向上させている。電動工具１を動作させるために、ユーザは、グリップ部１１０を握りながら、トリガスイッチ４をハウジング１００の内部に押し込む操作を行う。トリガスイッチ４が操作されると、制御回路の制御の下、メインスイッチ５からの電気信号に基づいて、ＦＥＴ５ｂにより、モータ２に電池パック２０からの電力が供給される。この電動工具１の動作時には、ＬＥＤ１３が点灯され、前方に光が照射される。このＬＥＤ１３による照明により、電動工具１を用いた作業の対象部位を確実に確認しながら、容易に作業を行うことができる。   In the electric power tool 1, the first substrate 6 is connected to the second substrate 7 via the first lead wire 11, so that the battery pack 20 is attached to the housing 100 in the state where the battery pack 20 is mounted. The control circuit can detect battery information such as the temperature of the battery pack 20 and the remaining capacity of the battery 21 via the communication connector 8 of the second substrate 7. Based on the battery information, the control circuit controls the FET 5b in the power supply circuit including the battery pack 20, the main switch 5, the motor 2, the FET 5b, etc., and controls the current flowing through the motor 2, or the battery pack 20 Control of charging of the battery 21 is performed. Thereby, the excessive load with respect to the battery pack 20 can be avoided, and the lifetime of the battery pack 20 is improved. In order to operate the electric power tool 1, the user performs an operation of pushing the trigger switch 4 into the housing 100 while grasping the grip part 110. When the trigger switch 4 is operated, the electric power from the battery pack 20 is supplied to the motor 2 by the FET 5b based on the electric signal from the main switch 5 under the control of the control circuit. During the operation of the electric power tool 1, the LED 13 is turned on and light is irradiated forward. With the illumination by the LED 13, the work can be easily performed while confirming the target part of the work using the electric power tool 1.

以上説明したように、本実施形態においては、第１基板６がグリップ部１１０の内部に配置されているので、ハウジング１００の内部に水が侵入し、重力によりハウジング１００の下部であるグリップ部１１０の下方に水が集まっても、第１基板６上の制御回路が電蝕されない。従って、電動工具１の信頼性を向上させるために困難な作業となる制御回路のコーティング等を行う必要がなく、電動工具１を容易に製造することができる。特に上記のように通信コネクタ８を可動式コネクタとして電動工具１の耐振動性や耐久性を向上させた場合であっても、複雑なマスキング等を要する制御回路のコーティング等を行う必要がないので、電動工具１を容易に製造することができる。   As described above, in the present embodiment, since the first substrate 6 is disposed inside the grip part 110, water enters the inside of the housing 100, and the grip part 110, which is the lower part of the housing 100, due to gravity. Even if water collects below the control circuit, the control circuit on the first substrate 6 is not eroded. Therefore, it is not necessary to perform control circuit coating or the like, which is a difficult operation for improving the reliability of the electric power tool 1, and the electric power tool 1 can be easily manufactured. In particular, even when the vibration resistance and durability of the electric power tool 1 are improved by using the communication connector 8 as a movable connector as described above, it is not necessary to perform coating of a control circuit that requires complicated masking or the like. The electric tool 1 can be easily manufactured.

なお、本発明は上記実施形態の構成に限定されるものではなく、種々の変形が可能である。例えば、本発明は、インパクトドライバに限られず、インパクト発生機構を有しない電動ドライバや、ルータ、電動ドリル、ジグソー等、トリガスイッチを操作してモータを駆動させて動作させることができる種々の電動工具に適用することができる。また、通信コネクタは、可動式のものに限られず、第２基板に対して変位しないような固定式のものであってもよい。さらにまた、例えば、第１基板には、ポッティングが施されていてもよい。すなわち、例えば、上記実施形態において、第１基板６が収納されたケース６ａに、第１基板６が完全に覆われるように、絶縁性を有する樹脂等を充填することにより、第１基板６上の制御回路が水にさらされることが全くなくなる。これにより、制御回路の電蝕による不具合の発生をさらに確実に防止することができる。また、この場合、第１基板に通信コネクタ等の外部に端子が露出する必要があるような部材は設けられていないので、ポッティング作業はきわめて容易に行うことができる。   In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible. For example, the present invention is not limited to an impact driver, and various electric tools that can be operated by driving a motor by operating a trigger switch, such as an electric driver without an impact generation mechanism, a router, an electric drill, a jigsaw, etc. Can be applied to. The communication connector is not limited to a movable type, and may be a fixed type that does not displace relative to the second substrate. Furthermore, for example, the first substrate may be potted. That is, for example, in the above embodiment, the case 6a in which the first substrate 6 is accommodated is filled with an insulating resin or the like so that the first substrate 6 is completely covered. The control circuit is never exposed to water. As a result, it is possible to more reliably prevent the occurrence of problems due to electric corrosion of the control circuit. In this case, since there is no member on the first substrate that needs to expose a terminal such as a communication connector, potting can be performed very easily.

さらにまた、第２基板のうち、例えばランドやはんだ部等の導通部にコーティングが施されていてもよい。図５は、上記実施形態の電動工具１の第２基板７にコーティングを施したものの一例を示す。図に示すように、コーティングは、第２基板７の上面に露出する通信コネクタ８の実装部について行われる。コーティングは、例えば、第２基板７から露出する半田部やランド、及び通信コネクタ８の端子部８ｂ等を覆うように、第２基板７の上面に、絶縁性を有する樹脂を半球形のコーティング部４０を成すように盛ること等により行われる。通信コネクタ８は、上述のように防水性を備えているので、このようにコーティング部４０を設けることにより、第２基板７の導通部が水に接触することがなくなり、第２基板７の防水性を向上させることができる。このように第２基板７にコーティングを施すことにより、ハウジング１００の内部に水が侵入しても、ハウジング１００の下部に設けられた第２基板７が水により電蝕されることが全くなくなり、より制御回路が確実に動作するようにし、電動工具１の信頼性を向上させることができる。   Furthermore, in the second substrate, for example, a coating may be applied to a conduction portion such as a land or a solder portion. FIG. 5 shows an example in which the second substrate 7 of the electric power tool 1 of the above embodiment is coated. As shown in the figure, the coating is performed on the mounting portion of the communication connector 8 exposed on the upper surface of the second substrate 7. For the coating, for example, a semispherical coating portion of an insulating resin is applied to the upper surface of the second substrate 7 so as to cover the solder portions and lands exposed from the second substrate 7 and the terminal portions 8b of the communication connector 8. For example, it is performed by piling up to 40. Since the communication connector 8 is waterproof as described above, by providing the coating portion 40 in this manner, the conductive portion of the second substrate 7 is not in contact with water, and the waterproof of the second substrate 7 is provided. Can be improved. By coating the second substrate 7 in this manner, even if water enters the inside of the housing 100, the second substrate 7 provided in the lower portion of the housing 100 is completely prevented from being electrically eroded by water, As a result, the control circuit can be reliably operated, and the reliability of the electric power tool 1 can be improved.

本発明の一実施形態に係る電動工具の一例を示す側断面図。The side sectional view showing an example of the electric tool concerning one embodiment of the present invention. 上記電動工具の別の方向からの側断面図。The sectional side view from another direction of the above-mentioned electric tool. 上記電動工具の回路部を示す斜視図。The perspective view which shows the circuit part of the said electric tool. 上記回路部の第２基板を示す斜視図。The perspective view which shows the 2nd board | substrate of the said circuit part. 上記実施形態の一変形例に係る第２基板を示す側面図。The side view which shows the 2nd board | substrate which concerns on the modification of the said embodiment. 従来の電動工具の一例を示す側断面図。Side sectional drawing which shows an example of the conventional electric tool. 上記電動工具の回路部を示す側面図。The side view which shows the circuit part of the said electric tool. 上記電動工具の回路部の別例を示す側面図。The side view which shows another example of the circuit part of the said electric tool.

符号の説明Explanation of symbols

１ 電動工具
２ モータ
３ 駆動部
４ トリガスイッチ
６ 第１基板
７ 第２基板
８ 通信コネクタ（可動式コネクタ）
１０ 回路部
２０ 電池パック
４０ コーティング部
１００ ハウジング
１１０ グリップ部 DESCRIPTION OF SYMBOLS 1 Electric tool 2 Motor 3 Drive part 4 Trigger switch 6 1st board | substrate 7 2nd board | substrate 8 Communication connector (movable connector)
DESCRIPTION OF SYMBOLS 10 Circuit part 20 Battery pack 40 Coating part 100 Housing 110 Grip part

Claims (3)

動力源であるモータと、
前記モータにより駆動される駆動部と、
前記モータの電源をＯＮ／ＯＦＦするために操作されるトリガスイッチと、
前記モータに電力を供給する電池パックと、
前記電池パックに設けられた接続コネクタと結合可能な通信コネクタを有し、前記電池パックから前記モータヘの電源供給を制御する制御回路を有する回路部と、
ユーザが把持可能なグリップ部を有し、前記モータ、駆動回路部、及び回路部を収納するハウジングとを備え、
前記電池パックは、前記グリップ部の下部に着脱可能に装着されており、電動工具本体への装着時に、前記接続コネクタと前記通信コネクタとが接続されるように構成されている電動工具において、
前記回路部は、前記制御回路が設けられた第１基板と、前記通信コネクタが設けられ、前記第１基板とは分離されて前記制御回路に接続されている第２基板とを有しており、
前記第１基板は、前記グリップ部の内部に配置されており、
前記第２基板は、前記グリップ部の下部に配置されていることを特徴とする電動工具。 A motor as a power source;
A drive unit driven by the motor;
A trigger switch operated to turn on / off the power of the motor;
A battery pack for supplying power to the motor;
A circuit unit having a communication connector that can be coupled to a connection connector provided in the battery pack, and having a control circuit for controlling power supply from the battery pack to the motor;
A grip portion that can be gripped by a user, and the motor, a drive circuit portion, and a housing that houses the circuit portion;
The battery pack is detachably attached to the lower part of the grip part, and the electric tool configured to connect the connection connector and the communication connector when attached to the electric tool body,
The circuit unit includes a first board provided with the control circuit, and a second board provided with the communication connector and separated from the first board and connected to the control circuit. ,
The first substrate is disposed inside the grip portion;
The electric power tool, wherein the second substrate is disposed below the grip portion. 前記第２基板の導通部は、絶縁剤によりコーティングされていることを特徴とする請求項１記載の電動工具。   The power tool according to claim 1, wherein the conductive portion of the second substrate is coated with an insulating agent. 前記通信コネクタは、前記第２基板に対し変位可能な可動式コネクタであることを特徴とする請求項１又は請求項２に記載の電動工具。   The electric tool according to claim 1, wherein the communication connector is a movable connector that can be displaced with respect to the second substrate.
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