JP6617911B2 - Electric tool - Google Patents
Electric tool Download PDFInfo
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- JP6617911B2 JP6617911B2 JP2015154072A JP2015154072A JP6617911B2 JP 6617911 B2 JP6617911 B2 JP 6617911B2 JP 2015154072 A JP2015154072 A JP 2015154072A JP 2015154072 A JP2015154072 A JP 2015154072A JP 6617911 B2 JP6617911 B2 JP 6617911B2
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/06—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
- H01H9/061—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner enclosing a continuously variable impedance
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- Portable Power Tools In General (AREA)
Description
本発明は、電動工具に関する。 The present invention relates to a power tool.
従来、電動工具としては、正逆方向に回動操作可能な操作部材を備え、その操作部材と一体的に回動する接点が回路基板上に設けられた可変抵抗部としての印刷抵抗に摺接されることで、操作部材の操作量（回動量）に応じた電圧値信号が生成されるものがある。この電動工具の回路基板には、操作部材が操作される正逆方向の両方向に対応した位置にそれぞれ可変抵抗部（印刷抵抗）が設けられている（例えば、特許文献１参照）。即ち、回路基板には、操作部材を正方向に回動操作した場合に接点が摺接する可変抵抗部（印刷抵抗）と、操作部材を逆方向に回動操作した場合に接点が摺接する可変抵抗部（印刷抵抗）とが設けられている。これにより、操作部材を正逆どちらに操作しても、その操作量（回動量）に応じた電圧値信号を生成することができ、その電圧値信号に応じて駆動源を駆動させることができる。 Conventionally, an electric tool has an operation member that can be rotated in forward and reverse directions, and a contact that rotates integrally with the operation member is in sliding contact with a printing resistor as a variable resistance portion provided on a circuit board. As a result, a voltage value signal corresponding to the operation amount (rotation amount) of the operation member is generated. The circuit board of the electric tool is provided with variable resistance portions (printing resistances) at positions corresponding to both the forward and reverse directions in which the operation member is operated (see, for example, Patent Document 1). That is, the circuit board includes a variable resistance portion (printing resistance) that contacts when the operating member is rotated in the forward direction and a variable resistance that contacts when the operating member is rotated in the reverse direction. Part (printing resistance). As a result, regardless of whether the operating member is operated forward or backward, a voltage value signal corresponding to the operation amount (rotation amount) can be generated, and the drive source can be driven according to the voltage value signal. .
しかしながら、上記した電動工具では、操作部材を操作する方向毎に可変抵抗部（印刷抵抗）が必要で無駄が多いという問題があった。
本発明は、上記課題を解決するためになされたものであって、その目的は、回路基板における無駄が少ない電動工具を提供することにある。
However, the above-described electric tool has a problem that a variable resistance portion (printing resistance) is required for each direction in which the operation member is operated, which is wasteful.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electric tool with little waste in a circuit board.
上記課題を解決する電動工具は、可動接点を有し正逆方向に操作可能な操作部材と、前記可動接点が摺接され、前記操作部材の操作量に応じた電圧値信号を生成可能な回路基板とを備えた電動工具であって、前記回路基板は、前記正逆方向の両方向に対応した位置に、それぞれ前記操作部材の操作量に応じて前記可動接点と接触する複数の電極部を有し、正方向の複数の電極部と逆方向の複数の電極部とは、共通の可変抵抗部に電気的に接続される。 An electric power tool that solves the above-described problem includes an operation member that has a movable contact and can be operated in the forward and reverse directions, and a circuit that can slide the movable contact and generate a voltage value signal corresponding to the operation amount of the operation member. The circuit board has a plurality of electrode portions that are in contact with the movable contact in accordance with the operation amount of the operation member, at positions corresponding to both the forward and reverse directions. The plurality of positive electrode portions and the plurality of reverse electrode portions are electrically connected to a common variable resistance portion.
本発明の電動工具によれば、回路基板における無駄を少なくすることができる。 According to the electric tool of the present invention, waste in the circuit board can be reduced.
以下、電動工具の一実施形態を図１〜図３に従って説明する。
図１に示すように、電動工具１０は、電動工具本体１１と、電動工具本体１１に対して回動可能な把持部１２とを有する。
Hereinafter, an embodiment of an electric power tool will be described with reference to FIGS.
As shown in FIG. 1, the electric tool 10 includes an electric tool main body 11 and a grip portion 12 that can rotate with respect to the electric tool main body 11.
電動工具本体１１は、その先端（前端）にドライバービットやタップ等の先端工具が装着される工具装着部１３が設けられ、基端側には正逆方向に回動操作可能な操作部材１４が設けられている。 The power tool main body 11 is provided with a tool mounting portion 13 on which a front end tool such as a driver bit or a tap is mounted at the front end (front end), and an operation member 14 that can be rotated in the forward and reverse directions on the base end side. Is provided.
図１及び図２（ｂ）に示すように、操作部材１４は、円筒状の外周に操作レバー１４ａが凸設された形状に形成され、電動工具本体１１の幅方向両側に形成された開口部１１ａから操作レバー１４ａが突出するように設けられている。この操作部材１４は、図示しない付勢部材によって、操作レバー１４ａが開口部１１ａにおける中間位置と対応した位置（中立位置）に付勢された状態で回動可能に支持され、その中立位置から正逆方向に回動操作可能とされている。 As shown in FIGS. 1 and 2B, the operation member 14 is formed in a shape in which an operation lever 14 a is protruded on a cylindrical outer periphery, and is formed on both sides in the width direction of the power tool body 11. The operation lever 14a protrudes from 11a. The operation member 14 is rotatably supported by a biasing member (not shown) in a state where the operation lever 14a is biased to a position (neutral position) corresponding to the intermediate position in the opening 11a. It can be rotated in the opposite direction.
又、図２（ｂ）に模式的に示すように、操作部材１４は、回動操作されると一体的に回動する第１可動接点１４ｂ及び第２可動接点１４ｃを有している。
そして、電動工具本体１１は、操作部材１４の回動軸方向に、前記第１及び第２可動接点１４ｂ，１４ｃが摺接され、操作部材１４の操作量（回動量）に応じた電圧値信号Ｓを生成可能な回路基板１５を備えている。
Further, as schematically shown in FIG. 2B, the operation member 14 has a first movable contact 14b and a second movable contact 14c that rotate integrally when being rotated.
The power tool body 11 is slidably contacted with the first and second movable contacts 14b and 14c in the direction of the rotation axis of the operation member 14, and a voltage value signal corresponding to the operation amount (rotation amount) of the operation member 14. A circuit board 15 capable of generating S is provided.
また、図１に示すように、電動工具本体１１は、前記電圧値信号Ｓに応じてＰＷＭ制御される直流モータＭを備え、前記工具装着部１３は、直流モータＭに動力伝達機構を介して連結されて該直流モータＭの回転駆動力によって回転駆動されることになる。 As shown in FIG. 1, the electric tool main body 11 includes a DC motor M that is PWM-controlled according to the voltage value signal S, and the tool mounting portion 13 is connected to the DC motor M via a power transmission mechanism. It is connected and is rotationally driven by the rotational driving force of the DC motor M.
ここで、図２（ｂ）に示すように、回路基板１５は、その一方の面において操作部材１４の（中立位置からの）正逆方向の両方向に対応した位置に、それぞれ操作部材１４の操作量に応じて第１可動接点１４ｂと接触する複数の電極部Ｐ１ａ，Ｐ１ｂ，Ｐ２ａ，Ｐ２ｂ，Ｐ３ａ，Ｐ３ｂ，Ｐ４ａ，Ｐ４ｂ，Ｐ５ａ，Ｐ５ｂ，ＰＺａ，ＰＺｂを有する。詳しくは、回路基板１５の一方の面には、中立位置にある第１可動接点１４ｂから正方向側に電極部Ｐ１ａ，Ｐ２ａ，Ｐ３ａ，Ｐ４ａ，Ｐ５ａ，ＰＺａがこの順で並設されている。また、回路基板１５の一方の面には、中立位置にある第１可動接点１４ｂから逆方向側に電極部Ｐ１ｂ，Ｐ２ｂ，Ｐ３ｂ，Ｐ４ｂ，Ｐ５ｂ，ＰＺｂがこの順で並設されている。これにより、第１可動接点１４ｂは、操作部材１４が正方向に操作されると、その操作量に応じて電極部Ｐ１ａ，Ｐ２ａ，Ｐ３ａ，Ｐ４ａ，Ｐ５ａ，ＰＺａとこの順で順次接触することになる。また、第１可動接点１４ｂは、操作部材１４が逆方向に操作されると、その操作量に応じて電極部Ｐ１ｂ，Ｐ２ｂ，Ｐ３ｂ，Ｐ４ｂ，Ｐ５ｂ，ＰＺｂとこの順で順次接触することになる。また、回路基板１５は、その一方の面に、操作部材１４が中立位置にある状態で、第１可動接点１４ｂと接触する中立時電極部ＰＧＮＤを有している。また、回路基板１５は、その一方の面に、操作部材１４の（操作可能範囲内の）操作量に関わらず第１可動接点１４ｂと接触する第１共通電極部ＰＫ１を有している。 Here, as shown in FIG. 2 (b), the circuit board 15 operates the operating member 14 at positions corresponding to both the forward and reverse directions (from the neutral position) of the operating member 14 on one surface thereof. A plurality of electrode portions P1a, P1b, P2a, P2b, P3a, P3b, P4a, P4b, P5a, P5b, PZa, and PZb are brought into contact with the first movable contact 14b according to the amount. Specifically, on one surface of the circuit board 15, electrode portions P1a, P2a, P3a, P4a, P5a, and PZa are arranged in parallel in this order from the first movable contact 14b in the neutral position to the positive direction side. Further, on one surface of the circuit board 15, electrode portions P1b, P2b, P3b, P4b, P5b, and PZb are arranged in parallel in this order from the first movable contact 14b in the neutral position to the opposite direction side. Thus, when the operation member 14 is operated in the forward direction, the first movable contact 14b sequentially contacts the electrode portions P1a, P2a, P3a, P4a, P5a, and PZa in this order according to the operation amount. Become. Further, when the operation member 14 is operated in the reverse direction, the first movable contact 14b sequentially contacts the electrode portions P1b, P2b, P3b, P4b, P5b, and PZb in this order according to the operation amount. . Further, the circuit board 15 has a neutral electrode portion PGND that contacts the first movable contact 14b in a state where the operation member 14 is in a neutral position on one surface thereof. Further, the circuit board 15 has a first common electrode portion PK1 that is in contact with the first movable contact 14b regardless of the operation amount (within the operable range) of the operation member 14 on one surface thereof.
また、回路基板１５は、その一方の面において操作部材１４の（中立位置からの）正逆方向の両方向に対応した位置に、それぞれ操作部材１４が操作（中立位置から回動）されると第２可動接点１４ｃと接触する操作時電極部Ｐ１１ａ，Ｐ１１ｂを有する。また、回路基板１５は、その一方の面に、操作部材１４の（操作可能範囲内の）操作量に関わらず第２可動接点１４ｃと接触する第２共通電極部ＰＫ２を有する。 Further, when the operation member 14 is operated (rotated from the neutral position) to the position corresponding to both the forward and reverse directions (from the neutral position) of the operation member 14 on one surface thereof, the circuit board 15 is changed to the first position. 2 It has electrode part P11a, P11b at the time of operation which contacts the movable contact 14c. Further, the circuit board 15 has a second common electrode portion PK2 that is in contact with the second movable contact 14c regardless of the operation amount (within the operable range) of the operation member 14 on one surface thereof.
また、図２（ａ）に示すように、回路基板１５の他方の面には、複数のダイオードＤ１〜Ｄ５と複数の抵抗素子Ｒ１〜Ｒ３が実装されている。尚、本実施形態では、直列に接続された抵抗部材としての抵抗素子Ｒ１及びダイオードＤ１〜Ｄ５によって可変抵抗部１６（図３参照）が構成されている。 Further, as shown in FIG. 2A, a plurality of diodes D1 to D5 and a plurality of resistance elements R1 to R3 are mounted on the other surface of the circuit board 15. In the present embodiment, the variable resistor portion 16 (see FIG. 3) is configured by the resistor element R1 and the diodes D1 to D5 as resistor members connected in series.
また、回路基板１５には、外部電源入力端子（コネクタ）ＶＩＮ、操作検知端子ＳＷＩＮ、電源端子ＶＣＣ、分圧端子ＶＲ、及びグランド端子ＧＮＤが設けられている。
次に、電動工具１０の回路構成について図３に従って説明する。
In addition, the circuit board 15 is provided with an external power input terminal (connector) VIN, an operation detection terminal SWIN, a power supply terminal VCC, a voltage dividing terminal VR, and a ground terminal GND.
Next, the circuit configuration of the electric power tool 10 will be described with reference to FIG.
図３に示すように、電動工具１０は、前記回路基板１５と、前記直流モータＭと、バッテリＢと、切り替えスイッチＳＷと、制御部としての制御回路２１と、スイッチング素子２２とを備える。 As shown in FIG. 3, the electric tool 10 includes the circuit board 15, the DC motor M, a battery B, a changeover switch SW, a control circuit 21 as a control unit, and a switching element 22.
そして、図３に示すように、前記回路基板１５は、外部電源入力端子ＶＩＮが切り替えスイッチＳＷを介してバッテリＢに接続され、操作検知端子ＳＷＩＮ、電源端子ＶＣＣ、分圧端子ＶＲ、及びグランド端子ＧＮＤがそれぞれ制御回路２１に接続されている。この制御回路２１は、操作検知端子ＳＷＩＮからの電源供給に基づいて電源端子ＶＣＣに電源を供給し、分圧端子ＶＲからの電圧値信号Ｓに応じたデューティ比のパルス信号をスイッチング素子２２の制御端子に出力するものである。 As shown in FIG. 3, the circuit board 15 has an external power supply input terminal VIN connected to the battery B via the changeover switch SW, an operation detection terminal SWIN, a power supply terminal VCC, a voltage dividing terminal VR, and a ground terminal. Each GND is connected to the control circuit 21. The control circuit 21 supplies power to the power supply terminal VCC based on power supply from the operation detection terminal SWIN, and controls the switching element 22 to output a pulse signal having a duty ratio corresponding to the voltage value signal S from the voltage dividing terminal VR. Is output to the terminal.
前記回路基板１５において、外部電源入力端子ＶＩＮは操作時電極部Ｐ１１ａ，Ｐ１１ｂに接続され、第２共通電極部ＰＫ２は操作検知端子ＳＷＩＮに接続されている。これにより、操作部材１４が操作（中立位置からいずれかの方向に回動）されると第２可動接点１４ｃによって操作検知端子ＳＷＩＮが外部電源入力端子ＶＩＮ（バッテリＢ）に接続されることになる。 In the circuit board 15, the external power input terminal VIN is connected to the operation electrode portions P11a and P11b, and the second common electrode portion PK2 is connected to the operation detection terminal SWIN. Thus, when the operation member 14 is operated (turned in any direction from the neutral position), the operation detection terminal SWIN is connected to the external power input terminal VIN (battery B) by the second movable contact 14c. .
また、回路基板１５において、前記電源端子ＶＣＣは、可変抵抗部１６（詳しくは抵抗素子Ｒ１、ダイオードＤ１、ダイオードＤ２、ダイオードＤ３、ダイオードＤ４、及びダイオードＤ５）を介してグランド端子ＧＮＤに接続されている。 In the circuit board 15, the power supply terminal VCC is connected to the ground terminal GND via the variable resistor 16 (specifically, the resistor element R 1, the diode D 1, the diode D 2, the diode D 3, the diode D 4, and the diode D 5). Yes.
また、回路基板１５において、前記中立時電極部ＰＧＮＤは、ダイオードＤ５のカソード、即ちグランド端子ＧＮＤに接続されている。また、前記電極部Ｐ１ａ，Ｐ１ｂは、ダイオードＤ４のカソードに接続されている。また、前記電極部Ｐ２ａ，Ｐ２ｂは、ダイオードＤ３のカソードに接続されている。また、前記電極部Ｐ３ａ，Ｐ３ｂは、ダイオードＤ２のカソードに接続されている。また、前記電極部Ｐ４ａ，Ｐ４ｂは、ダイオードＤ１のカソードに接続されている。また、前記電極部Ｐ５ａ，Ｐ５ｂは、ダイオードＤ１のアノードに接続されている。また、前記電極部ＰＺａ，ＰＺｂは、電流を一定の値に制限するための抵抗素子Ｒ２を介して前記電源端子ＶＣＣに接続されている。 In the circuit board 15, the neutral electrode portion PGND is connected to the cathode of the diode D5, that is, to the ground terminal GND. The electrode portions P1a and P1b are connected to the cathode of the diode D4. The electrode portions P2a and P2b are connected to the cathode of the diode D3. The electrode portions P3a and P3b are connected to the cathode of the diode D2. The electrode portions P4a and P4b are connected to the cathode of the diode D1. The electrode portions P5a and P5b are connected to the anode of the diode D1. The electrode portions PZa and PZb are connected to the power supply terminal VCC via a resistance element R2 for limiting the current to a constant value.
また、回路基板１５において、前記第１共通電極部ＰＫ１は、保護用の抵抗素子Ｒ３を介して前記分圧端子ＶＲに接続されている。
上記構成により、操作部材１４が中立位置にある場合では、第１可動接点１４ｂによって分圧端子ＶＲが中立時電極部ＰＧＮＤ（即ちグランド）に接続され、制御回路２１からスイッチング素子２２にパルス信号が出力されることはない。
In the circuit board 15, the first common electrode portion PK1 is connected to the voltage dividing terminal VR via a protective resistance element R3.
With the above configuration, when the operation member 14 is in the neutral position, the voltage dividing terminal VR is connected to the neutral electrode portion PGND (that is, the ground) by the first movable contact 14b, and a pulse signal is transmitted from the control circuit 21 to the switching element 22. It is never output.
そして、操作部材１４が中立位置から操作（回動）されるとその操作量に応じて第１可動接点１４ｂによって分圧端子ＶＲがいずれかの電極部Ｐ１ａ，Ｐ１ｂ，Ｐ２ａ，Ｐ２ｂ，Ｐ３ａ，Ｐ３ｂ，Ｐ４ａ，Ｐ４ｂ，Ｐ５ａ，Ｐ５ｂ，ＰＺａ，ＰＺｂに接続される。これにより、制御回路２１には、分圧端子ＶＲから可変抵抗部１６（抵抗素子Ｒ１及びダイオードＤ１〜Ｄ５）によって生成された電圧値信号Ｓが入力され、制御回路２１から電圧値信号Ｓに応じたデューティ比のパルス信号がスイッチング素子２２に出力される。 When the operation member 14 is operated (turned) from the neutral position, the voltage dividing terminal VR is set to one of the electrode portions P1a, P1b, P2a, P2b, P3a, P3b by the first movable contact 14b according to the operation amount. , P4a, P4b, P5a, P5b, PZa, PZb. As a result, the voltage value signal S generated by the variable resistor 16 (resistive element R1 and diodes D1 to D5) is input to the control circuit 21 from the voltage dividing terminal VR, and the control circuit 21 responds to the voltage value signal S. The pulse signal having the duty ratio is output to the switching element 22.
切り替えスイッチＳＷは、操作部材１４の操作方向に応じて直流モータＭの回転方向を正逆切り替えるためのスイッチであって、電動工具本体１１における操作部材１４の近傍に設けられている。切り替えスイッチＳＷは、操作部材１４が正方向に操作されると直流モータＭの第１端子２２ａをバッテリＢに接続するスイッチＳＷａと、操作部材１４が逆方向に操作されると直流モータＭの第２端子２２ｂをバッテリＢに接続するスイッチＳＷｂとを有する。スイッチＳＷａは、操作部材１４が正方向に操作されていないと前記第１端子２２ａをスイッチング素子２２を介してグランドに接続する。また、スイッチＳＷｂは、操作部材１４が逆方向に操作されていないと前記第２端子２２ｂをスイッチング素子２２を介してグランドに接続する。 The change-over switch SW is a switch for switching the rotation direction of the DC motor M forward and reverse according to the operation direction of the operation member 14, and is provided in the vicinity of the operation member 14 in the electric tool main body 11. The change-over switch SW includes a switch SWa that connects the first terminal 22a of the DC motor M to the battery B when the operation member 14 is operated in the forward direction, and a switch SWa that connects the first terminal 22a of the DC motor M to the battery B. And a switch SWb for connecting the two terminals 22b to the battery B. The switch SWa connects the first terminal 22a to the ground via the switching element 22 when the operation member 14 is not operated in the forward direction. Further, the switch SWb connects the second terminal 22b to the ground via the switching element 22 when the operation member 14 is not operated in the reverse direction.
次に、上記のように構成された電動工具１０の作用について説明する。
例えば、操作部材１４が正方向に操作されると、直流モータＭの第１端子２２ａはバッテリＢに接続され、第２端子２２ｂはスイッチング素子２２を介してグランドに接続される。
Next, the operation of the electric power tool 10 configured as described above will be described.
For example, when the operation member 14 is operated in the forward direction, the first terminal 22 a of the DC motor M is connected to the battery B, and the second terminal 22 b is connected to the ground via the switching element 22.
また、第２可動接点１４ｃによって操作検知端子ＳＷＩＮが外部電源入力端子ＶＩＮ（バッテリＢ）に接続され、制御回路２１に電源が供給され、制御回路２１から電源端子ＶＣＣに電源が供給される。すると、操作部材１４の操作量（回動量）に応じて、第１可動接点１４ｂによって分圧端子ＶＲがいずれかの電極部Ｐ１ａ，Ｐ２ａ，Ｐ３ａ，Ｐ４ａ，Ｐ５ａ，ＰＺａに接続される。これにより、制御回路２１には可変抵抗部１６（抵抗素子Ｒ１及びダイオードＤ１〜Ｄ５）によって分圧されて生成された電圧値信号Ｓが入力される。すると、制御回路２１から前記電圧値信号Ｓに応じたデューティ比のパルス信号がスイッチング素子２２に出力され、該パルス信号に応じて直流モータＭが正方向に回転駆動される。これにより、工具装着部１３及び工具装着部１３に装着されたドライバービットやタップ等の先端工具が正方向に回転駆動される。 Further, the operation detection terminal SWIN is connected to the external power input terminal VIN (battery B) by the second movable contact 14c, power is supplied to the control circuit 21, and power is supplied from the control circuit 21 to the power supply terminal VCC. Then, the voltage dividing terminal VR is connected to one of the electrode portions P1a, P2a, P3a, P4a, P5a, and PZa by the first movable contact 14b according to the operation amount (rotation amount) of the operation member 14. As a result, the control circuit 21 receives the voltage value signal S generated by voltage division by the variable resistor section 16 (the resistance element R1 and the diodes D1 to D5). Then, a pulse signal having a duty ratio corresponding to the voltage value signal S is output from the control circuit 21 to the switching element 22, and the DC motor M is rotationally driven in the positive direction according to the pulse signal. As a result, the tool mounting portion 13 and the tip tool such as a driver bit and a tap mounted on the tool mounting portion 13 are rotationally driven in the forward direction.
また例えば、操作部材１４が逆方向に操作されると、直流モータＭの第２端子２２ｂはバッテリＢに接続され、第１端子２２ａはスイッチング素子２２を介してグランドに接続される。 For example, when the operation member 14 is operated in the reverse direction, the second terminal 22 b of the DC motor M is connected to the battery B, and the first terminal 22 a is connected to the ground via the switching element 22.
また、第２可動接点１４ｃによって操作検知端子ＳＷＩＮが外部電源入力端子ＶＩＮ（バッテリＢ）に接続され、制御回路２１に電源が供給され、制御回路２１から電源端子ＶＣＣに電源が供給される。すると、操作部材１４の操作量（回動量）に応じて、第１可動接点１４ｂによって分圧端子ＶＲがいずれかの電極部Ｐ１ｂ，Ｐ２ｂ，Ｐ３ｂ，Ｐ４ｂ，Ｐ５ｂ，ＰＺｂに接続される。これにより、制御回路２１には可変抵抗部１６（抵抗素子Ｒ１及びダイオードＤ１〜Ｄ５）によって分圧されて生成された電圧値信号Ｓが入力される。すると、制御回路２１から前記電圧値信号Ｓに応じたデューティ比のパルス信号がスイッチング素子２２に出力され、該パルス信号に応じて直流モータＭが逆方向に回転駆動される。これにより、工具装着部１３及び工具装着部１３に装着されたドライバービットやタップ等の先端工具が逆方向に回転駆動される。 Further, the operation detection terminal SWIN is connected to the external power input terminal VIN (battery B) by the second movable contact 14c, power is supplied to the control circuit 21, and power is supplied from the control circuit 21 to the power supply terminal VCC. Then, the voltage dividing terminal VR is connected to one of the electrode portions P1b, P2b, P3b, P4b, P5b, and PZb by the first movable contact 14b according to the operation amount (rotation amount) of the operation member 14. As a result, the control circuit 21 receives the voltage value signal S generated by voltage division by the variable resistor section 16 (the resistance element R1 and the diodes D1 to D5). Then, a pulse signal having a duty ratio corresponding to the voltage value signal S is output from the control circuit 21 to the switching element 22, and the DC motor M is rotationally driven in the reverse direction according to the pulse signal. As a result, the tool mounting portion 13 and the tip tool such as a driver bit and a tap mounted on the tool mounting portion 13 are rotationally driven in the reverse direction.
次に、上記実施形態の特徴的な効果を以下に記載する。
（１）回路基板１５は、操作部材１４の正逆方向の両方向に対応した位置に、それぞれ操作部材１４の操作量に応じて第１可動接点１４ｂと接触する複数の電極部Ｐ１ａ，Ｐ１ｂ，Ｐ２ａ，Ｐ２ｂ，Ｐ３ａ，Ｐ３ｂ，Ｐ４ａ，Ｐ４ｂ，Ｐ５ａ，Ｐ５ｂ，ＰＺａ，ＰＺｂを有する。そして、正方向の複数の電極部Ｐ１ａ，Ｐ２ａ，Ｐ３ａ，Ｐ４ａ，Ｐ５ａ，ＰＺａと逆方向の複数の電極部Ｐ１ｂ，Ｐ２ｂ，Ｐ３ｂ，Ｐ４ｂ，Ｐ５ｂ，ＰＺｂとは、共通の可変抵抗部１６に電気的に接続される。よって、操作部材１４を操作する方向毎に可変抵抗部を有するものに比べて、可変抵抗部１６の数を減らすことができる。
Next, the characteristic effects of the above embodiment will be described below.
(1) The circuit board 15 has a plurality of electrode portions P1a, P1b, and P2a that are in contact with the first movable contact 14b according to the operation amount of the operation member 14 at positions corresponding to both the forward and reverse directions of the operation member 14, respectively. , P2b, P3a, P3b, P4a, P4b, P5a, P5b, PZa, PZb. The plurality of positive electrode portions P1a, P2a, P3a, P4a, P5a, and PZa and the plurality of electrode portions P1b, P2b, P3b, P4b, P5b, and PZb in the opposite direction are electrically connected to the common variable resistance portion 16. Connected. Therefore, the number of variable resistance portions 16 can be reduced as compared with the one having variable resistance portions for each direction in which the operation member 14 is operated.
（２）可変抵抗部１６は、複数の抵抗部材（抵抗素子Ｒ１及びダイオードＤ１〜Ｄ５）にて構成されるため、印刷抵抗を用いたもののように製造が困難とならず、容易に製造することができる。 (2) Since the variable resistance portion 16 is composed of a plurality of resistance members (the resistance element R1 and the diodes D1 to D5), the variable resistance portion 16 is easily manufactured without being difficult to manufacture like the one using the printing resistor. Can do.
上記実施形態は、以下のように変更してもよい。
・上記実施形態のように抵抗部材としてダイオードＤ１〜Ｄ５を用いた場合、制御回路２１はダイオードＤ１〜Ｄ５の順方向電圧を取得し、該順方向電圧に基づいて電圧値信号Ｓのレベルを判定し、そのレベルに応じたパルス信号を出力するようにしてもよい。
The above embodiment may be modified as follows.
When the diodes D1 to D5 are used as the resistance members as in the above embodiment, the control circuit 21 acquires the forward voltage of the diodes D1 to D5 and determines the level of the voltage value signal S based on the forward voltage In addition, a pulse signal corresponding to the level may be output.
具体的には、図４に示すように、変更してもよい。この例では、回路基板１５にダイオードＤ１のアノードに接続された順方向電圧検出用端子ＳＥＴが追加され、該順方向電圧検出用端子ＳＥＴが制御回路２１に接続されている。そして、制御回路２１は、操作検知端子ＳＷＩＮを介して電源が供給されると全てのダイオードＤ１〜Ｄ５の順方向電圧の合算値を所得し、その合算値に基づいて前記電圧値信号Ｓのレベルを判定する。即ち、ダイオードＤ１〜Ｄ５の順方向電圧（合算値）が大きいときには、電圧値信号Ｓも大きくなることを考慮して閾値を変更し、操作部材１４の操作量のレベルを判定し、そのレベルに応じたデューティ比のパルス信号をスイッチング素子２２に出力する。 Specifically, it may be changed as shown in FIG. In this example, a forward voltage detection terminal SET connected to the anode of the diode D 1 is added to the circuit board 15, and the forward voltage detection terminal SET is connected to the control circuit 21. When the power is supplied through the operation detection terminal SWIN, the control circuit 21 obtains the sum value of the forward voltages of all the diodes D1 to D5, and the level of the voltage value signal S based on the sum value. Determine. That is, when the forward voltage (total value) of the diodes D1 to D5 is large, the threshold value is changed in consideration of the fact that the voltage value signal S also becomes large, the level of the operation amount of the operation member 14 is determined, and the level is reached. A pulse signal with a corresponding duty ratio is output to the switching element 22.
このようにすると、温度変化によるダイオードＤ１〜Ｄ５の順方向電圧の変化の影響を除去して操作部材１４の操作量（レベル）を高精度に判定することができる。その結果、温度に関わらず操作部材１４の操作量に応じた直流モータＭの駆動を行うことが可能となる。 In this way, the operation amount (level) of the operation member 14 can be determined with high accuracy by removing the influence of the change in the forward voltage of the diodes D1 to D5 due to the temperature change. As a result, it becomes possible to drive the DC motor M according to the operation amount of the operation member 14 regardless of the temperature.
また、この例の制御回路２１は、全てのダイオードＤ１〜Ｄ５の順方向電圧の合算値を所得し、その合算値に基づいて電圧値信号Ｓのレベルを判定するため、例えば１つのダイオードの順方向電圧を取得して判定する場合に比べて、精度を向上させることができる。尚、勿論、制御回路２１は、全てのダイオードＤ１〜Ｄ５の順方向電圧の合算値を所得しなくてもよい。例えば、順方向電圧検出用端子ＳＥＴをダイオードＤ５のアノードに接続し、ダイオードＤ５の順方向電圧のみを取得して、該順方向電圧に基づいて電圧値信号Ｓのレベルを判定するように変更してもよい。 Further, the control circuit 21 of this example obtains the sum value of the forward voltages of all the diodes D1 to D5, and determines the level of the voltage value signal S based on the sum value. Compared with the case where the direction voltage is acquired and determined, the accuracy can be improved. Of course, the control circuit 21 does not have to obtain the sum of the forward voltages of all the diodes D1 to D5. For example, the forward voltage detection terminal SET is connected to the anode of the diode D5, only the forward voltage of the diode D5 is acquired, and the level of the voltage value signal S is determined based on the forward voltage. May be.
・上記実施形態では、可変抵抗部を、複数の抵抗部材（素子）にて構成し、抵抗部材を抵抗素子Ｒ１及びダイオードＤ１〜Ｄ５としたが、これに限定されず、他の構成の可変抵抗部に変更してもよい。例えば、可変抵抗部を印刷抵抗にて構成してもよい。また、抵抗部材を全て抵抗素子としてもよい。また、抵抗部材を全てダイオードとしてもよい。尚、抵抗部材を全てダイオードとする場合、それらダイオードと直列に電流を一定の値に制限するための抵抗素子を設けるといった必要がある。また、勿論、抵抗部材の数（ひいては電圧値信号Ｓの数）を変更した構成としてもよい。 In the above embodiment, the variable resistance portion is configured by a plurality of resistance members (elements), and the resistance members are the resistance element R1 and the diodes D1 to D5. You may change to a part. For example, the variable resistance unit may be configured with a printing resistor. Further, all the resistance members may be resistance elements. Further, all the resistance members may be diodes. When all the resistance members are diodes, it is necessary to provide a resistance element for limiting the current to a constant value in series with the diodes. Of course, the number of resistance members (and thus the number of voltage value signals S) may be changed.
次に、上記実施形態及び別例から把握できる技術的思想を以下に追記する。
（付記１）可動接点を有し正逆方向に操作可能な操作部材と、前記可動接点が摺接され、前記操作部材の操作量に応じた電圧値信号を生成可能な回路基板とを備えた電動工具であって、
前記回路基板は、前記正逆方向の両方向に対応した位置に、それぞれ前記操作部材の操作量に応じて前記可動接点と接触する複数の電極部を有し、正方向の複数の電極部と逆方向の複数の電極部とは、共通の可変抵抗部に電気的に接続されたことを特徴とする電動工具。
Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(Supplementary Note 1) An operation member having a movable contact and operable in the forward and reverse directions, and a circuit board that is slidable in contact with the movable contact and can generate a voltage value signal corresponding to the operation amount of the operation member. An electric tool,
The circuit board has a plurality of electrode portions in contact with the movable contact according to the operation amount of the operation member at positions corresponding to both the forward and reverse directions, and is opposite to the forward electrode portions. The plurality of electrode portions in the direction are electrically connected to a common variable resistance portion.
（付記２）付記１に記載の電動工具において、前記可変抵抗部は、複数の抵抗部材にて構成されたことを特徴とする電動工具。
（付記３）付記２に記載の電動工具において、前記抵抗部材は、ダイオードを含むことを特徴とする電動工具。
(Additional remark 2) The electric tool of Additional remark 1 WHEREIN: The said variable resistance part was comprised with the some resistance member, The electric tool characterized by the above-mentioned.
(Additional remark 3) The electric tool of Additional remark 2 WHEREIN: The said resistance member contains a diode, The electric tool characterized by the above-mentioned.
（付記４）付記２又は付記３に記載の電動工具において、前記抵抗部材は、抵抗素子を含むことを特徴とする電動工具。
（付記５）付記３に記載の電動工具において、
前記ダイオードの順方向電圧を取得し、該順方向電圧に基づいて前記電圧値信号のレベルを判定する制御部を備えたことを特徴とする電動工具。
(Additional remark 4) The electric tool of Additional remark 2 or Additional remark 3 WHEREIN: The said resistance member contains a resistive element, The electric tool characterized by the above-mentioned.
(Additional remark 5) In the electric tool of Additional remark 3,
An electric tool comprising: a control unit that acquires a forward voltage of the diode and determines a level of the voltage value signal based on the forward voltage.
（付記６）付記５に記載の電動工具において、前記制御部は、前記可変抵抗部を構成する全てのダイオードの順方向電圧の合算値を所得して、その合算値に基づいて前記電圧値信号のレベルを判定することを特徴とする電動工具。 (Supplementary note 6) In the electric power tool according to supplementary note 5, the control unit obtains a sum value of forward voltages of all the diodes constituting the variable resistance portion, and the voltage value signal based on the sum value. A power tool characterized by determining the level of the power.
１４…操作部材、１４ｂ…第１可動接点（可動接点）、Ｄ１〜Ｄ５…可変抵抗部を構成する抵抗部材としてのダイオード、Ｒ１…可変抵抗部を構成する抵抗部材としての抵抗素子、Ｓ…電圧値信号、Ｐ１ａ，Ｐ１ｂ，Ｐ２ａ，Ｐ２ｂ，Ｐ３ａ，Ｐ３ｂ，Ｐ４ａ，Ｐ４ｂ，Ｐ５ａ，Ｐ５ｂ，ＰＺａ，ＰＺｂ…電極部。 DESCRIPTION OF SYMBOLS 14 ... Operation member, 14b ... 1st movable contact (movable contact), D1-D5 ... Diode as a resistance member which comprises a variable resistance part, R1 ... Resistance element as a resistance member which comprises a variable resistance part, S ... Voltage Value signal, P1a, P1b, P2a, P2b, P3a, P3b, P4a, P4b, P5a, P5b, PZa, PZb...
Claims (10)
前記正操作方向または前記逆操作方向における前記操作部材の操作量に応じた電圧値信号を生成可能な回路基板とを備え、
前記操作部材は可動接点を有し、
前記回路基板は前記正操作方向における前記操作部材の操作量に応じて前記可動接点と接触するようにそれぞれ異なる位置に設けられる複数の正電極部と、前記逆操作方向における前記操作部材の操作量に応じて前記可動接点と接触するようにそれぞれ異なる位置に設けられる複数の逆電極部と、前記複数の正電極部および前記複数の逆電極部のそれぞれに電気的に接続された共通の可変抵抗部とを有する
電動工具。 An operation member operable in a normal operation direction for driving the electric tool in a normal direction and a reverse operation direction for driving the electric tool in a reverse direction;
A circuit board capable of generating a voltage value signal according to an operation amount of the operation member in the normal operation direction or the reverse operation direction,
The operating member has a movable contact,
The circuit board has a plurality of positive electrode portions provided at different positions so as to come into contact with the movable contact according to an operation amount of the operation member in the forward operation direction, and an operation amount of the operation member in the reverse operation direction. A plurality of reverse electrode portions provided at different positions so as to come into contact with the movable contact, and a common variable resistor electrically connected to each of the plurality of positive electrode portions and the plurality of reverse electrode portions. A power tool having a portion.
前記複数の正電極部および前記複数の逆電極部は前記第１面および前記第２面の一方に設けられ、
前記可変抵抗部は前記第１面および前記第２面の他方に設けられている
請求項１に記載の電動工具。 The circuit board includes a first surface and a second surface located on the opposite side of the first surface;
The plurality of positive electrode portions and the plurality of reverse electrode portions are provided on one of the first surface and the second surface,
The electric tool according to claim 1, wherein the variable resistance portion is provided on the other of the first surface and the second surface.
前記正操作方向は前記操作部材の回転中心軸まわりにおける一方の回動方向であり、
前記逆操作方向は前記操作部材の回転中心軸まわりにおける他方の回動方向であり、
前記複数の正電極部および前記複数の逆電極部は前記操作部材の回動中心軸に対して周方向に並ぶように設けられている
請求項１または２に記載の電動工具。 The operation member is rotatable about a rotation center axis of the operation member;
The normal operation direction is one rotation direction around the rotation center axis of the operation member,
The reverse operation direction is the other rotation direction around the rotation center axis of the operation member,
The power tool according to claim 1 or 2, wherein the plurality of positive electrode portions and the plurality of reverse electrode portions are provided so as to be arranged in a circumferential direction with respect to a rotation center axis of the operation member.
請求項３に記載の電動工具。 At least one of the plurality of positive electrode portions and the plurality of reverse electrode portions includes a first electrode portion and a second electrode portion that are adjacent to each other with a gap in the circumferential direction of the rotation center axis of the operation member, and the gap The power tool according to claim 3, further comprising at least a third electrode portion provided on the outer side or the inner side in the radial direction of the rotation center axis of the operation member.
前記共通電極部は前記電動工具を正方向または逆方向に駆動する前記操作部材の操作範囲において前記操作部材の操作量に関わらず前記可動接点と接触するように構成されている
請求項１〜４のいずれか一項に記載の電動工具。 The circuit board further includes a voltage dividing terminal electrically connected to the variable resistance portion, and a common electrode portion electrically connected to the voltage dividing terminal,
The common electrode portion is configured to contact the movable contact regardless of an operation amount of the operation member in an operation range of the operation member for driving the electric tool in a forward direction or a reverse direction. The power tool according to any one of the above.
請求項１〜５のいずれか一項に記載の電動工具。 The power tool according to claim 1, wherein the variable resistance portion includes a plurality of resistance members.
請求項６に記載の電動工具。 The power tool according to claim 6, wherein the resistance member includes one or a plurality of diodes.
請求項７に記載の電動工具。 The power tool according to claim 7, further comprising a control unit that determines a level of the voltage value signal based on a forward voltage of the diode.
請求項８に記載の電動工具。 The power tool according to claim 8, wherein the control unit determines a level of the voltage value signal based on a sum value of forward voltages of a plurality of diodes included in the variable resistance unit.
請求項６〜９のいずれか一項に記載の電動工具。 The electric tool according to claim 6, wherein the resistance member includes a resistance element.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015154072A JP6617911B2 (en) | 2015-08-04 | 2015-08-04 | Electric tool |
| EP16180371.3A EP3138662B1 (en) | 2015-08-04 | 2016-07-20 | Electric power tool |
| CN201610580206.5A CN106426008B (en) | 2015-08-04 | 2016-07-21 | Electric tool |
Applications Claiming Priority (1)
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| JP2015154072A JP6617911B2 (en) | 2015-08-04 | 2015-08-04 | Electric tool |
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| JP2017030111A JP2017030111A (en) | 2017-02-09 |
| JP6617911B2 true JP6617911B2 (en) | 2019-12-11 |
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| JP (1) | JP6617911B2 (en) |
| CN (1) | CN106426008B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60184228U (en) * | 1984-05-17 | 1985-12-06 | カシオ計算機株式会社 | Rotary switch automatic return mechanism |
| DE4121264A1 (en) * | 1990-06-27 | 1992-01-02 | Marquardt Gmbh | SWITCHES, ESPECIALLY FOR THE SPEED CONTROL OF ELECTRIC MOTORS OR THE LIKE |
| DE4335715A1 (en) * | 1993-08-29 | 1995-03-02 | Duerrwaechter E Dr Doduco | Potentiometer |
| DE4410312C2 (en) * | 1994-03-25 | 2000-01-13 | Bosch Gmbh Robert | Electric hand tool with potentiometer and method for adjusting the potentiometer |
| DE102005042873A1 (en) * | 2005-09-08 | 2007-03-22 | Ebe Elektro-Bau-Elemente Gmbh | Potentiometer e.g. film potentiometer, has resistance strip suitable for switching within electric circuit between circuit points at different electrical potential |
| JP5262701B2 (en) * | 2008-12-26 | 2013-08-14 | オムロン株式会社 | Power tool switch |
| JP2011185884A (en) * | 2010-03-11 | 2011-09-22 | Murata Mfg Co Ltd | Method and apparatus for measuring dc bias-capacitance characteristic |
| JP2012196732A (en) * | 2011-03-22 | 2012-10-18 | Satori S-Tech Co Ltd | Switch for electric power tool |
| US8493172B2 (en) * | 2011-09-30 | 2013-07-23 | Snap-On Incorporated | Variable speed toggle trigger |
| AU2013200917A1 (en) * | 2012-03-22 | 2013-10-10 | Ethicon Endo-Surgery, Inc. | Activation feature for surgical instrument with pencil grip |
| EP2688080B1 (en) * | 2012-07-16 | 2019-05-29 | Black & Decker Inc. | Electronic switching module for a power tool |
| JP6004226B2 (en) * | 2012-09-13 | 2016-10-05 | パナソニックＩｐマネジメント株式会社 | Trigger switch and power tool |
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| CN106426008B (en) | 2020-05-01 |
| JP2017030111A (en) | 2017-02-09 |
| CN106426008A (en) | 2017-02-22 |
| EP3138662B1 (en) | 2018-12-19 |
| EP3138662A1 (en) | 2017-03-08 |
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