JP2017213626A - Electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric tool which can improve operability with an operation switching switch using a push switch.SOLUTION: An impact driver 1A which is an electric tool is equipped with: a switch 7 which operates a brushless motor 2; a normal/reverse switching switch 8 which receives operation for switching normal rotations and reverse rotations of the brushless motor 2; and a control portion 110 which switches a rotary direction of the brushless motor 2 when the normal/reverse switching switch 8 is operated, keeps the normal rotations and reverse rotations of the brushless motor 2 during the operation of the normal/reserve switching switch 8, and switches the rotary direction of the brushless motor 2, when the operation of the normal/reverse switching switch 8 is released.SELECTED DRAWING: Figure 22

Description

  The present invention relates to an electric tool driven by a motor.

  An electric tool driven by a motor is provided with a switch for switching between rotation and stop of the motor and an operation for changing the rotation speed, and an operation switching switch for switching between normal rotation and reverse rotation of the motor.

  In electric tools such as impact drivers and electric drill drivers, the operation switch has an operation part that penetrates the handle and can be displaced in the left-right direction, and pushes the operation part that protrudes on one side of the handle and protrudes on the other side. In this configuration, the rotational direction of the motor can be switched by displacing it to the position where it is to be performed. In addition, a configuration having a function of mechanically locking the switch when the operation unit is in a neutral position is also known. Furthermore, there has been proposed an electric tool that can change settings using an operation changeover switch (see, for example, Patent Document 1).

  In such an operation changeover switch, a predetermined stroke is required for the operation unit in order to operate the switch. Therefore, the amount of protrusion from the handle of the operation unit is large, which hinders operation. Further, in such an operation changeover switch, an operation part for switching between normal rotation and reverse rotation is arranged on both side surfaces of the handle, so that an operation for switching from normal rotation to reverse rotation or an operation for switching from reverse rotation to normal rotation is performed. On the other hand, it is necessary to operate the operation unit by separating the finger operating the trigger for rotating the motor from the trigger. Therefore, an electric tool using a switch with a small stroke called a push switch as an operation switching switch has been proposed (for example, see Patent Document 2).

JP 2010-228041 A JP 2009-248290 A

  By using a push switch with a small stroke, it is difficult to obtain an operational feeling of pressing the operation unit. In such a configuration that uses the switch to switch between forward rotation and reverse rotation of the motor, it is difficult to recognize which direction of rotation of the motor is set, which may cause erroneous operation. In addition, when operating to change the rotation direction, it is necessary to lift the finger from the trigger in order to operate the operation unit, and the operability is poor. Furthermore, since the rotation of the motor is stopped by releasing the finger from the trigger during the switching operation of the rotation direction, the operation is frequently stopped in the operation of repeatedly switching between normal rotation and reverse rotation, resulting in poor work efficiency.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an electric tool capable of improving operability with an operation changeover switch using a push switch.

  In order to solve the above-described problems, the present invention provides a motor for driving a driven portion, a housing for housing the motor, a handle provided in the housing, and a trigger provided on the top of the handle. A switch to be operated, an operation switching switch having an operation part for receiving at least an operation for switching between normal rotation and reverse rotation of the motor, and normal rotation and reverse rotation of the motor are set based on whether or not the operation switching switch is operated. During operation, the power tool includes a control unit that maintains normal rotation or reverse rotation of the motor.

  In the present invention, when the operation changeover switch is operated, the rotation direction of the motor is changed, and the forward or reverse rotation of the motor is maintained while the operation changeover switch is operated. When the operation of the operation switch is released, the rotation direction of the motor is switched.

  In the present invention, since the presence / absence of operation switch operation is associated with the motor rotation direction, it is easy to determine which motor rotation direction is set even when a switch with a small stroke such as a push switch is used. Can be recognized. Further, it is not necessary to stop the rotation of the motor every time the rotation direction of the motor is switched, and the workability is improved. Furthermore, since it is not necessary to re-grip the handle for the operation of switching the rotation direction of the motor, the operability is improved.

It is a whole lineblock diagram showing an example of an impact driver of this embodiment. It is an external appearance side view which shows an example of the impact driver of this Embodiment. It is a partially broken sectional view which shows an example of the impact driver of this Embodiment. It is a principal part disassembled perspective view which shows an example of the impact driver of this Embodiment. It is a perspective view which shows an example of the brushless motor of this Embodiment. It is a perspective view which shows an example of the brushless motor of this Embodiment. It is a perspective view which shows an example of the housing of this Embodiment. It is a perspective view which shows an example of the housing of this Embodiment. It is a perspective view which shows an example of the housing of this Embodiment. It is a perspective view which shows an example of the housing of this Embodiment. It is a block diagram which shows an example of the battery attaching part of this Embodiment. It is a block diagram which shows an example of the battery attaching part of this Embodiment. It is a block diagram which shows an example of a battery. It is a block diagram which shows an example of a functional component support member. It is a block diagram which shows an example of a functional component support member. It is sectional drawing which shows an example of the switch of this Embodiment. It is a perspective view which shows an example of the normal / reverse selector switch of this Embodiment. It is a disassembled perspective view which shows an example of the normal / reverse selector switch of this Embodiment. It is sectional drawing which shows the state in which the normal / reverse selector switch of this Embodiment was attached. It is a rear view which shows the state in which the normal / reverse selector switch of this Embodiment was attached. It is a front view which shows the modification of the normal / reverse selector switch of this Embodiment. It is a functional block diagram which shows an example of the control function of the impact driver of this Embodiment. It is a flowchart which shows an example of operation | movement of the impact driver of this Embodiment. It is process drawing which shows an example of operation | movement of the impact driver of this Embodiment. It is a flowchart which shows the other example of operation | movement of the impact driver of this Embodiment. It is a flowchart which shows the other example of operation | movement of the impact driver of this Embodiment. It is a block diagram which shows the modification of the electric tool of this Embodiment.

  Hereinafter, an impact driver which is an example of an embodiment of a power tool of the present invention will be described with reference to the drawings.

<Overall configuration example of impact driver of this embodiment>
FIG. 1 is an overall configuration diagram illustrating an example of an impact driver according to the present embodiment, and FIG. 2 is an external side view illustrating an example of an impact driver according to the present embodiment. FIG. 3 is a partially cutaway sectional view showing an example of the impact driver of the present embodiment, and FIG. 4 is an exploded perspective view of a main part showing an example of the impact driver of the present embodiment.

  The impact driver 1A of this embodiment includes a brushless motor 2 and a fan 3 that cools the brushless motor 2 and the like. The impact driver 1 </ b> A includes an anvil 6 to which the driving force of the brushless motor 2 is transmitted via the speed reducer 4 and the hammer unit 5.

  Further, the impact driver 1A includes a switch 7 for operating the brushless motor 2 and a forward / reverse switching switch 8 for switching between normal rotation and reverse rotation of the brushless motor 2. Further, the impact driver 1A includes a battery attachment portion 9 to which a battery 90 as a power source is detachably attached.

  Further, the impact driver 1A includes a housing 10 that constitutes a part of the structure of the brushless motor 2 such as an exterior and a bearing of the brushless motor 2 and that constitutes the exterior of the entire impact driver 1A.

  Further, the impact driver 1A includes a handle 10H provided with a switch 7, a forward / reverse selector switch 8, and the like.

  Further, the impact driver 1A includes a control board 100 on which a control circuit for controlling the brushless motor 2 and the like is formed according to the operation of the switch 7 and the forward / reverse switching switch 8, and a drive board on which a drive circuit for driving the brushless motor 2 is formed. 101.

  The impact driver 1A has a brushless motor 2 as a driving unit, a fan 3 as a driven unit, a speed reducer 4, a hammer unit 5 and an anvil 6 on the upper side of the handle 10H, when the direction in which the handle 10H extends is the vertical direction. Is provided. Further, the impact driver 1 </ b> A has a handle 10 </ b> H extending in a direction intersecting with a predetermined angle with respect to an axial direction, which will be described later, of the brushless motor 2. Further, the impact driver 1A is provided with a switch 7 on the upper front surface of the handle 10H that can be operated by a hand holding the handle 10H, and a forward / reverse switching switch 8 on both upper side surfaces.

<Configuration example of brushless motor of this embodiment>
FIG.5 and FIG.6 is a perspective view which shows an example of the brushless motor of this Embodiment, The brushless motor 2 of this Embodiment is demonstrated with reference to each figure.

  The brushless motor 2 is an example of a motor, and includes a rotor 20 and a stator 21 around the rotor 20. The rotor 20 is provided with permanent magnets in a predetermined arrangement along a circumferential direction around a shaft 20a that is an output shaft of the drive unit.

  In the following description, the direction along the shaft 20a is referred to as the axial direction of the brushless motor 2, and the axial direction of the brushless motor 2 is referred to as the front-rear direction of the impact driver 1A. The direction orthogonal to the shaft 20a is referred to as the radial direction of the brushless motor 2.

  The stator 21 includes a position restricting portion 21a that restricts a position along the axial direction of the brushless motor 2 and a position in the rotational direction. The position restricting portion 21 a is configured by providing a protrusion protruding in the radial direction of the brushless motor 2 on the outer periphery of the stator 21.

  The stator 21 includes a drive coil 22 in a predetermined arrangement along a circumferential direction centering on the shaft 20a. In this example, the stator 21 includes six slots 22a arranged in the circumferential direction at intervals of 60 °. A conductive wire 22b is wound around each slot 22a, and a drive coil 22 is configured at the position of the slot 22a. The stator 21 includes a gap 23 between the drive coils 22 along the axial direction of the brushless motor 2. In the brushless motor 2, the rotor 20 rotates by passing a current through the drive coil 22 in a predetermined pattern.

  The brushless motor 2 includes a sensor substrate 102 that detects the rotational position of the rotor 20. The sensor substrate 102 includes a hall sensor 102 a that detects a magnetic change of a permanent magnet provided on the rotor 20. The hall sensor 102a is provided on a surface opposite to the surface facing the rotor 20 and the stator 21 in a predetermined arrangement along the circumferential direction around the shaft 20a. In this example, three Hall sensors 102a arranged in the circumferential direction at intervals of 120 ° are provided.

  The stator 21 is provided with a board mounting portion 27 in accordance with the position where the slot 22a is formed. The board attaching portion 27 projects in the axial direction of the brushless motor 2 from one end face of the stator 21, and a predetermined space is provided to the stator 21 to attach the sensor board 102.

  When the sensor substrate 102 is attached to the substrate attachment portion 27 with screws 27 a, an air port 28 connected to the gap portion 23 is formed between the sensor substrate 102 and the stator 21.

  The fan 3 is attached to a shaft 20 a extending rearward of the brushless motor 2 and rotates integrally with the rotor 20. The fan 3 includes a concave portion 30 into which the bearing portion 24 enters on the rear surface side along the axial direction of the brushless motor 2.

  The bearing portion 24 includes a bearing 24a into which a shaft 20a extending rearward of the brushless motor 2 is inserted, and a shaft support portion 12B described later that supports the bearing 24a.

  In the brushless motor 2, the air sucked from the first vent 10 a provided on the side surface of the housing 10 passes through the gap 23 from the air port 28 and passes through the second vent 10 b provided on the rear side surface of the housing 10. A flow path for the discharged air is formed. The brushless motor 2 has a configuration in which the air port 28 and the first vent 10a are provided with their positions shifted in the circumferential direction, and the air port 28 is not directly exposed to the first vent 10a. Thereby, it can suppress that dust etc. are suck | inhaled in the stator 21, suppressing that the flow of air is inhibited.

<Examples of effects of the brushless motor of the present embodiment>
In the brushless motor 2, when the fan 3 is rotated by the rotation of the rotor 20, the air sucked from the first vent 10 a passes through the gap portion 23 from the air vent 28 and is discharged from the second vent 10 b. As a result, the drive coil 22 and the like are cooled.

  With a brushless motor that uses a Hall sensor, in the configuration where the sensor board is mounted on the stator, if the board mounting part is provided between the slots, the board mounting part will block air passing between the drive coils, and cooling Sexuality decreases.

  On the other hand, in the brushless motor 2, the board mounting portion 27 is provided in accordance with the formation position of the slot 22a, so that the board mounting portion 27 does not hinder the air passing between the air port 28 and the drive coil 22, Coolability of the drive coil 22 and the like is improved.

  Also, in a brushless motor that uses a Hall sensor, in the configuration where the Hall sensor is provided on the rotor side, dust contained in the air sucked from the air port between the sensor board and the stator contacts the Hall sensor, and the Hall sensor The sensor can be damaged.

  Also, in order to shorten the length of the impact driver along the axial direction, if the sensor board and the rotor are placed close to each other, the holes will be reduced due to looseness in the assembly of each part and wear of the part over a long period of use. There is a possibility that the sensor and the rotor come close to each other, the Hall sensor comes into contact with the rotor, and the Hall sensor is damaged.

  On the other hand, in the sensor substrate 102, the hall sensor 102 a is provided on the surface opposite to the surface facing the rotor 20 and the stator 21, so that the flow path of air sucked between the air opening 28 and the drive coil 22. The hall sensor 102a does not exist inside, and the dust contained in the air sucked from the air port 28 does not contact the hall sensor 102a.

  Further, even if the distance between the sensor substrate 102 and the rotor 20 is reduced, the Hall sensor 102 does not contact the rotor 20 due to deterioration over time. Furthermore, as described above, the board mounting portion 27 is provided in accordance with the formation position of the slot 22a, so that the cooling performance of the drive coil 22 and the like can be improved even if the length of the air port 28 along the axial direction is shortened. Reduction is suppressed. Thereby, the length along the axial direction of the impact driver 1A can be shortened as an arrangement in which the distance between the sensor substrate 102 and the rotor 20 is reduced.

<Configuration example of speed reducer of the present embodiment>
The speed reducer 4 is an example of a driven part. In this example, the speed reducer 4 is composed of a planetary gear, and is connected to a shaft 20a extending in front of the brushless motor 2 constituting the input shaft, and a planetary gear meshing with the sun gear 40. 41 and an internal gear 42 that meshes with the planetary gear 41.

  The internal gear 42 is an example of a driven part structure, and is a first that regulates the position of the stator 21 along the axial direction of the brushless motor 2 and the position of the internal gear 42 along the radial direction of the brushless motor 2. A position restricting portion 42a is provided. The internal gear 42 includes a second position restricting portion 42 b that restricts the position of the internal gear 42 along the axial direction of the brushless motor 2.

  The first position restricting portion 42 a is configured by providing a convex portion that protrudes in the radial direction of the brushless motor 2 on the outer periphery of the internal gear 42 and that protrudes in the axial direction rearward on the side where the stator 21 is provided. The The second position restricting portion 42 b is configured by providing a convex portion protruding in the radial direction of the brushless motor 2 in front of the outer periphery of the internal gear 42.

  The internal gear 42 includes a shaft support portion 42 c that supports the bearing 25 into which the shaft 20 a extending in front of the brushless motor 2 is inserted. The shaft support portion 42 c protrudes in the axial direction from the rear surface side of the internal gear 42 facing the brushless motor 2, and enters an opening 102 b provided in the sensor substrate 102 that is a structure of the brushless motor 2. The rotor 20 is rotatably supported by a bearing 25 provided on an internal gear 42 with a shaft 20 a extending in front of the brushless motor 2. Further, the internal gear 42 is provided with a protruding portion 42 d on the opposite side of the shaft support portion 42 c along the axial direction of the brushless motor 2.

<Configuration example of hammer unit of this embodiment>
The hammer unit 5 is an example of a driven part, and includes a spindle 50 to which the driving force of the brushless motor 2 is transmitted via the speed reducer 4. The spindle 50 is a planetary carrier to which the planetary gear 41 is attached, and constitutes the output shaft of the speed reducer 4. The spindle 50 is rotatably supported by a bearing 26 provided on the internal gear 42.

  Further, the hammer unit 5 includes a hammer 51 a that applies a striking force in the rotational direction to the anvil 6, and a compression spring 51 b that biases the hammer 51 a in a direction approaching the anvil 6. In the hammer unit 5, a hammer 51 a, a compression spring 51 b and an anvil 6 are accommodated in a hammer unit case 52.

  In the hammer unit 5, when a load exceeding a predetermined value is applied to the anvil 6, the hammer 51 a moves backward while compressing the compression spring 51 b, so that the rotation of the anvil 6 and the hammer 51 a is temporarily released. Thereafter, the hammer 51a moves forward by the force restored by the compression spring 51b, and the hammer 51a strikes the anvil 6 in the rotational direction.

  The anvil 6 is an example of an output shaft, is coaxially supported with the shaft 20a of the brushless motor 2 and is rotatably supported by the hammer unit case 52 via a needle bearing 60 with a seal, and the driving force of the brushless motor 2 is supplied to the hammer unit 5. And is struck in the direction of rotation by the hammer unit 5.

  A bit or a socket (not shown) is detachably attached to the anvil 6 so that a screw can be fastened to an object to be fastened while striking in the rotation direction.

<Configuration example of housing of this embodiment>
7 to 10 are perspective views showing an example of the housing of the present embodiment, and the housing 10 of the present embodiment will be described with reference to each drawing. The housing 10 is divided into front and rear along the axial direction of the brushless motor 2 and includes a front housing 11F and a rear housing 11R.

  The rear housing 11R is an example of a first housing, and includes a motor case portion 12R constituting the exterior of the brushless motor 2 and a handle portion 13R constituting the handle 10H. In the rear housing 11R, a motor case portion 12R and a handle portion 13R are formed by integral molding of resin, and a divided surface 14R to which the front housing 11F is attached opens in a predetermined shape.

  The rear housing 11R includes the shaft support portion 12B that constitutes the bearing portion 24 described above. The support portion 12B is configured by providing a convex portion having a shape into which the bearing 24a fits inside the rear surface of the motor case portion 12R. The shaft support portion 12B protrudes inward from the rear surface of the motor case portion 12R in accordance with the thickness of the bearing 24a along the axial direction of the brushless motor 2. The shaft support portion 12B and the bearing 24a supported by the shaft support portion 12B are configured to enter the recess 30 of the fan 3.

  The rear housing 11 </ b> R includes a stator support portion 120 that supports the stator 21 and the internal gear 42, and an internal gear support portion 121 that supports the internal gear 42.

  The stator support portion 120 is an example of a support portion that is a stator support portion, and is configured by providing a concave groove portion extending along the axial direction of the brushless motor 2 inside the side surface of the motor case portion 12R. In the stator support portion 120, the position restricting portion 21a of the stator 21 and the first position restricting portion 42a of the internal gear 42 are inserted.

  The stator support portion 120 is a first portion that restricts the position of the stator 21 along the axial direction of the brushless motor 2 by contacting the end surface along the axial direction of the brushless motor 2 at the position restricting portion 21 a of the stator 21. The regulation part 120a is provided.

  Further, the stator support portion 120 is in contact with the outer periphery of the stator 21 and the outer peripheral surface of the internal gear 42, and a second restricting portion that restricts the positions of the stator 21 and the internal gear 42 along the radial direction of the brushless motor 2. 120b. Further, the stator support portion 120 is in contact with the side surfaces of the position restricting portion 21 a of the stator 21 and the first position restricting portion 42 a of the internal gear 42, and the stator 21 and the internal gear 42 along the rotation direction of the brushless motor 2. The 3rd control part 120c which controls the position of is provided.

  The internal gear support portion 121 is an example of a support portion that is a driven portion support portion. The internal gear support portion 121 is configured by providing a step portion that is concave in the radial direction of the brushless motor 2 on the inner surface of the motor case portion 12R. The second position restricting portion 42b is inserted.

  The internal gear support portion 121 is in contact with the end surface along the axial direction of the brushless motor 2 in the second position restricting portion 42b of the internal gear 42, and restricts the position of the internal gear 42 along the axial direction of the brushless motor 2. The 1st control part 121a is provided.

  The front housing 11F is an example of a second housing, and includes a hammer case portion 12F constituting the exterior of the hammer unit 5 and a handle portion 13F constituting the handle 10H. In the front housing 11F, the hammer case portion 12F and the handle portion 13F are formed by integral molding of resin, and a dividing surface 14F attached to the rear housing 11R opens in a predetermined shape.

  The front housing 11F includes a hammer mounting portion 122 to which the hammer unit 5 is mounted. The hammer mounting portion 122 is configured by providing a stepped portion having a concave shape in the radial direction of the brushless motor 2 on the inner surface of the hammer case portion 12F and into which the hammer unit case 52 is fitted.

  The rear housing 11R includes a hole 16R to which a screw 15 for attaching the front housing 11F to the rear housing 11R is fastened. The front housing 11F includes a hole 16F into which the screw 15 is inserted.

  The hole 16R, the hole 16F, and the screw 15 are an example of a locking portion that integrates the rear housing 11R and the front housing 11F. Since the front housing 11 </ b> F and the rear housing 11 </ b> R are divided in the front-rear direction, the screw 15 fastens the front housing 11 </ b> F and the rear housing 11 </ b> R along the axial direction of the brushless motor 2.

  For this reason, the hole 16 </ b> R extends along the axial direction of the brushless motor 2. Further, the hole portion 16R is provided in both the motor case portion 12R and the handle portion 13R. The hole 16R provided in the motor case portion 12R is provided outside the internal gear 42 attached to the stator 21 attached to the stator support portion 120 and the internal gear support portion 121 in the radial direction of the brushless motor 2.

  The hole 16F extends along the axial direction of the brushless motor 2, and is provided in accordance with the position of the hole 16R of the rear housing 11R.

  The front housing 11F and the rear housing 11R include a control board attachment portion 18b to which the control board 100 is attached and a drive board attachment portion 18a to which the drive board 101 is attached. The control board mounting portion 18b is provided below the handle 10H and above the battery mounting portion 9. The drive board mounting portion 18a is provided above the handle 10H and below the motor case portion 12R and the hammer case portion 12F.

  The control board 100 is housed in the control board case 100a and sealed with a resin (not shown), thereby waterproofing and dustproofing the electronic components. Similarly, the drive board 101 is housed in the drive board case 101a and sealed with a resin (not shown), thereby waterproofing and dustproofing the electronic components.

  The control board 100 and the drive board 101 are connected by a signal line 100b. Further, the drive substrate 101 and the sensor substrate 102 are connected by a signal line 102c. Furthermore, the power supply pin 92 exposed to the battery mounting portion 9 and the drive substrate 101 are connected by the power supply line 101b. In addition, the drive substrate 101 and each drive coil 22 are connected by a drive line 101 c via the sensor substrate 102.

<Example of effects of the housing of the present embodiment>
The stator 21 is attached to the motor case portion 12R of the rear housing 11R with the position restricting portion 21a inserted into the stator support portion 120.

  In the internal gear 42, the first position restricting portion 42a is inserted into the stator support portion 120, the second position restricting portion 42b is inserted into the internal gear support portion 121, and the motor case portion 12R of the rear housing 11R. Attached to.

  The hammer unit 5 is inserted into a hammer mounting portion 122 provided on the front housing 11F and attached to the hammer case portion 12F of the front housing 11F.

  When the front housing 11F is attached to the rear housing 11R and the screw 15 is fastened to the hole 16R, the internal gear 42 is pressed in the axial direction by the hammer unit case 52. Accordingly, the internal gear 42 is fixed to the rear housing 11R in a state where the second position restricting portion 42b of the internal gear 42 is in contact with the first restricting portion 121a of the internal gear supporting portion 121. Further, the hammer unit 5 is fixed to the front housing 11F.

  If the housing is divided into left and right, the position where the hole to which the screw is fastened is located between the driven part structures such as between the stator and the internal gear. For this reason, the length along an axial direction becomes long.

  On the other hand, in the shape in which the front housing 11F and the rear housing 11R are divided in the front-rear direction, the hole portion 16R has a stator 21 and an internal gear support portion attached to the stator support portion 120 in the radial direction of the brushless motor 2. It can be provided outside the internal gear 42 attached to 121.

  Thereby, it is not necessary to provide the hole 16R between the driven part structures such as between the stator 21 and the internal gear 42, and the length along the axial direction of the brushless motor 2 can be shortened in the impact driver 1A. . In this example, the stator 21 and the internal gear 42 are supported by the rear housing 11R by the same stator support portion 120. However, the stator 21 and the internal gear 42 are supported by the rear housing 11R by different support portions. Even in the supported configuration, the length along the axial direction of the brushless motor 2 can be shortened in the impact driver 1A. Even in a configuration in which one of the stator 21 and the internal gear 42 is supported by the rear housing 11R by the support portion, the length along the axial direction of the brushless motor 2 can be shortened in the impact driver 1A.

  In a conventional impact driver, the anvil is supported via a metal bush and sealed with an oil seal. In contrast, in the impact driver 1A of the present embodiment, the anvil 6 is supported by the needle bearing 60 with a seal. This eliminates the need for an oil seal as a separate component and reduces the length of the brushless motor 2 along the axial direction.

  Further, in order to shorten the length along the axial direction of the brushless motor 2, the distance between the bearing 25 that supports the internal gear 42 on the shaft 20 a of the brushless motor 2 and the bearing 26 that supports the spindle 50 on the internal gear 42 is shortened. There is a possibility that the internal gear 42 becomes thin and the strength decreases.

  Therefore, the internal gear 42 is provided with a protrusion 42d on the opposite side of the shaft support 42c along the axial direction of the brushless motor 2. As a result, in the internal gear 42, the length between the support portion of the bearing 25 and the support portion of the bearing 26 is shortened, and a predetermined thickness is secured at a portion where strength is required, so that the internal gear 42 has a predetermined thickness. Strength can be maintained.

  In this embodiment, the shaft 20a of the brushless motor 2 that is the output shaft of the drive unit and the spindle 50 and the anvil 6 of the speed reducer 4 that are the output shaft of the driven unit are arranged coaxially. . On the other hand, for example, the input shaft and output shaft of the speed reducer 4 are non-coaxial, and the axial direction of the shaft 20a of the brushless motor 2 and the axial direction of the anvil 6 are positioned parallel to the vertical or horizontal direction. A staggered arrangement is also possible.

  Thus, if the output shaft of the drive unit and the output shaft of the driven shaft are parallel, the rear housing 11R and the front housing 11F are divided in the front-rear direction along the axial direction of each output shaft. Whether the output shaft of the part and the output shaft of the driven part are coaxial or non-coaxial, the length along the axial direction of the output shaft can be shortened.

  Further, when the housing is divided into left and right parts, the support portion of the bearing inserted into the shaft of the brushless motor has a shape divided into right and left perpendicular to the axial direction. For this reason, the housing cannot be assembled unless a space through which the support portion passes is provided between the members provided before and after the bearing along the axial direction. Accordingly, a space larger than the thickness of the bearing is required between the front and rear members of the bearing, and the length along the axial direction of the impact driver is increased.

  On the other hand, in the shape in which the front housing 11F and the rear housing 11R are divided in the front and rear directions, the bearing 24a and the bearing 24a are provided in the recess 30 of the fan 3 which is one of the members provided in the front and rear of the bearing 24a along the axial direction. It can be set as the form in which the shaft support part 12B which supports is inserted.

  As a result, a space larger than the thickness of the bearing 24a is not required between the rear surface of the motor case portion 12R, which is the other of the members provided before and after the bearing 24a, and the fan 3, and in the impact driver 1A, the brushless The length along the axial direction of the motor 2 can be shortened. In this example, a space necessary for the rotation of the fan 3 and for generating a predetermined air flow may be formed between the fan 3 and the rear surface of the motor case portion 12R.

  Further, since the shaft support portion 12B enters the recess 30 of the fan 3, the shaft support portion 12B protrudes inward from the rear surface of the motor case portion 12R, and outward protrusion is suppressed on the rear surface of the motor case portion 12R. The shape can be changed. Thereby, in the impact driver 1A, the length along the axial direction of the brushless motor 2 can be shortened.

  Also, the shaft support portion 42c of the bearing 25 is provided in the internal gear 42 attached to the rear housing 11R by insertion along the axial direction of the brushless motor 2, so that the shaft support portion is provided in the opening 102b provided in the sensor substrate 102. 42c can be used.

  Thereby, a space larger than the thickness of the bearing 25 is not required between the sensor substrate 102 and the internal gear 42, and the length along the axial direction of the brushless motor 2 can be shortened in the impact driver 1A. The dividing surfaces 14F and 14R of the front housing 11F and the rear housing 11R are inclined with respect to a direction orthogonal to the axial direction of the brushless motor 2 if the front housing 11F and the rear housing 11R are divided in the front-rear direction. May be.

  In the housing divided into left and right, both the structure in which the part where the bearing is provided is divided in the front-rear direction and the structure in which the housing is divided in the front-rear direction are the housing in which the stator is supported and the housing in which the bearing is supported. It is a separate part, and one side and the other side of the shaft of the rotor are also supported by bearings provided in different housings, so it is difficult to improve the radial accuracy of the stator and the rotor. .

  On the other hand, the position of the stator 21 and the internal gear 42 along the radial direction of the brushless motor 2 is restricted by the second restricting portion 120b of the stator supporting portion 120. Since the stator 21 and the internal gear 42 are radially positioned by the stator support portion 120 of the motor case portion 12R that is a single member, the radial direction between the stator 21 and the internal gear 42 is limited. The position accuracy of the is improved.

  The rotor 20 has a shaft 20a extending rearward of the brushless motor 2 rotatably supported by a shaft support portion 12B provided on the motor case portion 12R of the rear housing 11R by a bearing 24a. A shaft 20a extending to the inner gear 42 is rotatably supported by a bearing 25 provided on the internal gear 42.

  Since the shaft support portion 12B is integrally formed with the motor case portion 12R, and the radial position accuracy between the stator 21 and the internal gear 42 is improved as described above, the rotor The positional accuracy in the radial direction between 20 and the stator 21 is improved. Thereby, the clearance gap between the outer periphery of the rotor 20 and the drive coil 22 of the stator 21 can be made small, and a torque can be improved.

  In this example, since the stator 21 and the internal gear 42 are supported by the rear housing 11R by the same stator support portion 120, the positional accuracy in the radial direction between the stator 21 and the internal gear 42 is improved. The configuration is improved. On the other hand, the stator 21 and the internal gear 42 are supported by the rear housing 11R even when the stator 21 is supported by the rear housing 11R by the support portion and the internal gear 42 is supported by the support portion provided on the stator 21. Thus, the positional accuracy in the radial direction between the stator 21 and the internal gear 42 can be improved. Further, the configuration in which the internal gear 42 is supported by the rear housing 11R by the support portion and the stator 21 is supported by the support portion provided in the internal gear 42, the configuration in which the stator 21 and the internal gear 42 are supported by the rear housing 11R. Thus, the positional accuracy in the radial direction between the stator 21 and the internal gear 42 can be improved.

  Further, the position of the internal gear 42 along the axial direction of the brushless motor 2 is restricted by the second position restricting portion 42 b coming into contact with the first restricting portion 121 a of the internal gear supporting portion 121.

  Further, the stator 21 is configured such that the position restricting portion 21a is interposed between the first restricting portion 120a of the stator supporting portion 120 and the first position restricting portion 42a of the internal gear 42, so that the shaft of the brushless motor 2 is provided. The position along the direction is restricted.

  In the impact driver 1 </ b> A, the internal gear 42 is pressed against the internal gear support 121 by the hammer unit case 52 of the hammer unit 5, so that vibration generated in the hammer unit 5 is transmitted to the internal gear 42. When vibration generated in the hammer unit 5 is transmitted to the stator 21 via the internal gear 42, an excessive load is applied to the stator 21, and a failure such as disconnection of the conductive wire 22b of the drive coil 22 may occur. There is sex.

  In addition, in the configuration in which the screw for fixing the housing is passed through the stator, and the configuration in which the screw for fixing the housing is fastened to the stator, vibration generated in the hammer unit is transmitted to the stator via the housing and the screw and fixed. The child is overloaded.

  Therefore, in a state where the second position restricting portion 42b of the internal gear 42 is in contact with the first restricting portion 121a of the internal gear support portion 121, the position restricting portion 21a of the stator 21 and the first position restricting portion 120a of the stator support portion 120 are used. A predetermined gap G is provided in at least one of the position restricting portion 120 a and the position restricting portion 21 a of the stator 21 and the first position restricting portion 42 a of the internal gear 42. Further, a hole 16R in which the screw 15 is fastened is provided in the motor case portion 12R outside the stator 21 in the radial direction of the brushless motor 2, and the stator 21 has a hole in which the screw 15 is fastened and inserted. It was set as the structure which does not provide.

  As a result, direct transmission of vibration from the first position restricting portion 42a of the internal gear 42 to the position restricting portion 21a of the stator 21 is suppressed, and the positional accuracy in the radial direction of the stator 21 is secured. Since the movement of the stator 21 along the axial direction of the brushless motor 2 is allowed, the load on the stator 21 is reduced.

<Configuration example of battery mounting portion of the present embodiment>
11 and 12 are configuration diagrams showing an example of the battery mounting portion of the present embodiment, FIG. 11 is a side sectional view of the main part of the impact driver showing the battery mounting portion of the present embodiment, and FIG. It is a principal part front view of the impact driver which shows the battery attaching part of this Embodiment. FIG. 13 is a configuration diagram illustrating an example of a battery.

  First, the configuration of the battery 90 will be described. The battery 90 is inserted into and removed from the impact driver 1A by moving in the front-rear direction indicated by the arrow A as shown in FIGS. The insertion / extraction direction of the battery 90 is parallel to the axial direction of the brushless motor 2 in this example, but is not limited thereto. As shown in FIG. 13C, the battery 90 includes a pair of guide protrusions 91 protruding outward and a pair of guide recesses 92 recessed inward in the left and right directions indicated by the arrow B.

  The guide convex portion 91 and the guide concave portion 92 extend along the insertion / extraction direction of the battery 90 indicated by the arrow A. The battery 90 includes an identification portion 91a that engages with a functional component support member 17 described later. In this example, the identification portion 91a is configured by providing a notch on the leading end side in the insertion direction of the battery 90 in one guide convex portion 91.

  Next, the battery attachment part of this Embodiment is demonstrated with reference to each figure. The impact driver 1A includes a battery attachment portion 9 for attaching a battery 90 to a lower portion of the handle 10H. The battery mounting portion 9 includes a pair of guide rail portions 9A on both sides in the left-right direction indicated by an arrow B in FIG. The guide rail portion 9A is an example of a rail portion. The rear housing 11R includes a rear rail portion 9R, and the front housing 11F includes a front rail portion 9F.

  The rear rail portion 9R is configured by providing a pair of convex portions that fit into the guide concave portion 92 of the battery 90 described above. Further, the front rail portion 9F is configured by providing a pair of convex portions that are shaped to fit into the guide concave portion 92 of the battery 90 described above.

The rear rail portion 9R is an example of a first rail portion, and extends along the front-rear direction of the impact driver 1A, which is the insertion / extraction direction of the battery 90 indicated by the arrow A. Rear rail portion 9R is provided with a first supporting surface 9Rd ₁ and the second support surface 9Rd ₂ facing the guide projection 91 of the battery 90.

The battery 90 is inserted into and removed from the front rail portion 9F side of the battery mounting portion 9. The rear rail portion 9 </ b> R includes a first support surface 9 </ b> Rd ₁ on the front side with respect to the insertion direction of the battery 90 and a second support surface 9 </ b> Rd ₂ on the back side with respect to the insertion direction of the battery 90. Battery mounting unit 9, a first support surface 9Rd ₁ and the second supporting surface 9Rd ₂ opposed to the guide surface 9Ru of the rear rail portion 9R is formed. Rear rail portion 9R is a spacing between the second supporting surface 9Rd ₂ and the guide surface 9RU is narrower composed of distance between the first supporting surface 9Rd ₁ and the guide surface 9RU.

  The front rail portion 9F is an example of a second rail portion, and extends along the front-rear direction of the impact driver 1A that is the insertion / extraction direction of the battery 90 indicated by the arrow A. The front rail portion 9 </ b> F includes a support surface 9 </ b> Fd that faces the guide convex portion 91 of the battery 90. The battery mounting portion 9 has a guide surface 9Fu facing the support surface 9Fd of the front rail portion 9F.

When the front housing 11F is attached to the rear housing 11R, the battery attachment portion 9 connects the front rail portion 9F and the rear rail portion 9R in this example. Thus, the battery mounting unit 9, a first recess between the support surface 9Rd ₁ and the second supporting surface 9Rd ₂ and the guide surface 9RU, supporting surface 9Fd the guide surface of the front rail portion 9F of the rear rail portion 9R A concave portion between 9Fu is connected, and a guide rail portion 9A extending along the insertion / extraction direction of the battery 90 indicated by an arrow A is configured.

The battery 90 is slidably guided with respect to the battery mounting portion 9 by the guide convex portion 91 engaging with the guide rail portion 9 </ b> A of the battery mounting portion 9. Battery 90, by the guide protrusion 91 fitted in the guide rail unit 9A, between the guide protrusion 91 of the first supporting surface 9Rd ₁ and the second supporting surface 9Rd ₂ and the guide surface 9Ru of the rear rail portion 9R Sandwiched between. In the battery 90, the guide protrusion 91 is sandwiched between the support surface 9Fd of the front rail portion 9F and the guide surface 9Fu.

<Examples of the effects of the battery mounting portion of the present embodiment>
As described above, since the housing 10 has a shape divided in the front-rear direction, the shape of the front housing 11F is concave along the front-rear direction with respect to the division surface 14F. Further, the shape of the rear housing 11R is concave along the front-rear direction with respect to the dividing surface 14R.

  For this reason, when the front housing 11F is molded with a mold (not shown), the direction in which the mold is pulled out is the direction in which the front rail portion 9F extends. Further, when the rear housing 11R is molded with a mold (not shown), the direction in which the mold is pulled out is the direction in which the rear rail portion 9R extends.

In order to remove the resin molded product from the mold, it is necessary to provide an inclination called a draft on the surface along the direction in which the mold is removed. Thereby, about the front rail part 9F, the draft is provided in the direction where the space | interval of the support surface 9Fd and the guide surface 9Fu spreads toward the division surface 14F. As for the rear rail portion 9R, distance between the first supporting surface 9Rd ₁ and the guide surface 9RU, and the direction in which the interval between the second supporting surface 9Rd ₂ and the guide surface 9RU is spread toward the dividing plane 14R Is provided with a draft angle.

Therefore, the front rail portion 9 </ b> F cannot be formed with a constant distance between the support surface 9 </ b> Fd and the guide surface 9 </ b> Fu in the front-rear direction along the insertion / extraction direction of the battery 90. The rear rail portion 9R is a spacing between the first supporting surface 9Rd ₁ and the guide surface 9RU, and, before and after the distance between the second supporting surface 9Rd ₂ and the guide surface 9RU, along the insertion direction of the battery 90 Can not be molded uniformly in the direction.

  As described above, the closer to the dividing surface 14R, the larger the gap between the opposing surfaces of the guide convex portion 91 and the rear rail portion 9R of the battery 90, which causes a problem that the battery 90 rattles.

Therefore, the guide convex portion 91 of the battery 90 is sandwiched between the support surface 9Fd of the front rail portion 9F and the guide surface 9Fu, and the rear rail 9R of the rear rail 9R located on the back side along the insertion direction of the battery 90 is inserted. The shape is sandwiched between the _two holding surfaces 9Rd2 and the guide surface 9Ru.

  Therefore, in the housing 10 divided into the front and rear, the guide projection 91 of the battery 90 is held at two points near the front end and the rear end of the guide rail portion 9A, so that the battery 90 is attached to the battery attachment portion 9. In this state, the battery 90 is prevented from rattling.

Thereby, the housing which can provide a holding surface in a rail part and can suppress the shakiness of a battery can be shape | molded using a metal mold | die. In the housing 10 divided into the front and the rear, if the guide protrusion 91 of the battery 90 is held at two points near the front end and the rear end of the guide rail 9A, the front rail 9F and the rear The rail portion 9R may be divided. However, before to the rail portion 9F side to allow insertion and removal of the battery 90, the distance between the supporting surface 9Fd the guide surface 9Fu prior rail portion 9F is, first the rear rail portion 9R support surface 9Rd ₁ and the second equivalent to distance between the supporting surface 9Rd ₂ and the guide surface 9Ru or broadly so as configured.

<Configuration example of functional component of this embodiment>
The impact driver 1A includes a strap 10S through which a hand is passed and a hook 10G that is hooked on a locked portion such as a belt in the battery mounting portion 9.

  The strap 10S is an example of a functional component, and is attached to the rear surface side of the battery attachment portion 9 so that the handle 10H can be grasped through the hand regardless of the dominant hand.

  The hook 10G is an example of a functional component, and the left and right of the handle 10H can be selected and attached so that the impact driver 1A can be hung on either the right side or the left side of the body according to the dominant hand. For this reason, the handle 10 </ b> H includes hook attachment portions 10 </ b> Ga on both the left and right sides of the battery attachment portion 9.

  The impact driver 1A includes a functional component support member 17 that can support the strap 10S and the hook 10G, which are different functional components, and a functional component attachment portion 11Rd to which the functional component support member 17 is attached. The functional component mounting portion 11Rd is provided on the inner surface of the rear housing 11R in accordance with the position of the guide rail portion 9A.

  14 and 15 are configuration diagrams illustrating an example of a functional component support member. The functional component support member 17 itself constitutes a functional component, and has a function of supporting the battery 90 in the battery mounting portion 9 and a function of regulating mounting of a battery that is not suitable for use.

That is, the functional component support member 17 includes an erroneous insertion prevention convex portion 17a that constitutes a part of the guide rail portion 9A. The erroneous insertion prevention convex portion 17a is an example of the erroneous insertion prevention portion, and protrudes between the support surfaces 9Rd ₁ and 9Rd ₂ and the guide surface 9Ru in at least one of the pair of left and right guide rail portions 9A, and the shape of the guide rail portion 9A is formed. Different on the left and right. In this example, the erroneous insertion prevention convex portion 17a is configured by providing a convex portion having a shape that fits into the identification portion 91a of the battery 90.

  The functional component support member 17 includes a first functional component support portion 17b that supports the shaft portion 10Sa passed through the strap 10S and a second functional component support portion 17c that supports the nut 10Gn that fixes the hook 10G. Prepare.

<Example of effects of functional component of this embodiment>
When attaching the strap to the rear side of the handle, in the conventional structure where the housing is divided into left and right, the strap is passed through a convex part called a screw boss with a hole to which the screw that integrates the left and right housings is fastened. The strap could be fixed between the left and right housings. Alternatively, the shaft portion through which the strap is passed can be fixed in a form sandwiched between the left and right housings.

  On the other hand, in the housing 10 divided into the front and rear, there is no divided surface of the housing 10 on the rear surface side of the rear housing 11R, and there is no screw boss extending in the left-right direction on the rear surface side of the rear housing 11R. The strap cannot be fixed by applying the conventional structure.

  Also. In the conventional structure in which the housing is divided into left and right, the nut for fixing the hook or the member for fixing the nut can be press-fitted into the position corresponding to the side surface of the handle from the divided surface side of the housing.

  On the other hand, in the housing 10 divided into the front and rear, the portion facing the inner side surface of the rear housing 11R is not opened, and a nut 10Gn or the like for fixing the hook 10G is press-fitted into a position corresponding to the side surface of the handle 10H. Can not do it.

  Therefore, the impact driver 1A includes a shaft fixing portion 11Ra to which the shaft portion 10Sa passed through the strap 10S is attached inside the rear surface of the rear housing 11R. Further, the impact driver 1A includes a hole portion 11Rb into which the nut 10Gn is inserted on the inner sides of the left and right sides of the rear housing 11R.

  Then, the impact driver 1A fixes the shaft portion 10Sa attached to the shaft fixing portion 11Ra and the nut 10Gn inserted into the hole portion 11Rb using the functional component support member 17 attached to the rear housing 11R.

  The shaft fixing portion 11Ra is configured by a concave portion that is fitted in a direction in which the shaft portion 10Sa extends in the left-right direction. The shaft fixing portion 11Ra penetrates the rear surface of the rear housing 11R and communicates with the opening 11Rc through which the strap 10S passes. The hole portion 11Rb is configured by a concave portion into which the nut 10Gn is fitted.

  Since the shaft portion 10Sa is a component independent of the rear housing 11R, it can be made of metal instead of resin, and the strength against tension of the strap 10S can be improved. Moreover, the freedom degree of the attachment position of the strap 10S improves by not utilizing a screw boss | hub. Further, the hole portion 11Rb has a size that allows a person to insert the nut 10Gn without using a tool or the like, and the workability for assembling the nut 10Gn is improved.

  The functional part mounting portion 11Rd is connected to the rear inner side of the rear housing 11R provided with the shaft fixing portion 11Ra from the inner side of the rear housing 11R provided with the hole 11Rb in accordance with the position of the guide rail portion 9A. Provided.

  The functional component support member 17 is fitted inside the rear surface of the rear housing 11R where the shaft fixing portion 11Ra is provided in the functional component mounting portion 11Rd, and the shaft portion 10Sa fitted in the shaft fixing portion 11Ra is fitted to the first functional component support portion 17b. And a hole 10Rn that is fitted inside the left and right side surfaces of the housing 11 and the nut 10Gn fitted in the hole 11Rb is pressed by the second functional component support portion 17c.

  The functional component support member 17 attached to the functional component attachment portion 11Rd is supported by the control board case 100a by attaching the front housing 11F to the rear housing 11R. A member that supports the functional component support member 17 may be provided integrally with the front housing 11F.

  The strap 10S is passed through the opening 11Rc, and the shaft portion 10Sa passed through the strap 10S is fitted into the shaft fixing portion 11Ra. Further, the nut 10Gn is fitted into the hole 11Rb. Then, by attaching the functional component support member 17 to the functional component attachment portion 11Rd, the shaft portion 10Sa fitted to the shaft fixing portion 11Ra is pressed by the first functional component support portion 17b of the functional component support member 17. Thereby, the strap 10S is fixed to the rear surface side of the handle 10H.

  Further, the nut 10Gn fitted in the hole 11Rb is pressed by the second functional component support portion 17c of the functional component support member 17. Thereby, the screw 10Gb can be fastened to the nut 10Gn, and the hook 10G is fixed to the left or right side surface of the handle 10H with the screw 10Gb.

  In the battery 90, the shape of the guide convex portion 91 or the guide concave portion 92 is changed for each voltage or the like. In this example, one of the pair of left and right guide convex portions 91 is provided with a recognition portion 91a by cutting out a part of the outer shape. Further, in the battery mounting portion 9, the pair of left and right guide rail portions 9 </ b> A has a shape corresponding to the battery 90 by the erroneous insertion preventing convex portion 17 a of the functional component support member 17.

  Thereby, about the battery 90 suitable for use, the insertion of the guide convex part 91 is not regulated by the erroneous insertion prevention convex part 17a in the middle of inserting the guide convex part 91 of the battery 90 into the guide rail part 9A. The battery 90 suitable for use can be mounted.

  On the other hand, for a battery that is not suitable for use, since the recognition portion 91a is not provided, the guide convex portion hits the erroneous insertion prevention convex portion 17a in the middle of inserting the guide convex portion of the battery into the guide rail portion 9A. , Insertion to a predetermined position is not possible. Therefore, erroneous mounting other than the battery 90 suitable for use is prevented.

  In addition, by providing the functional component support member 17 with the erroneous insertion prevention convex portion 17a, the functional component support member 17 having a different shape of the erroneous insertion prevention convex portion 17a is used, and the batteries having different voltages and the like in the same rear housing 11R. Can be provided.

  Further, the nut 10Gn fitted in the hole 11Rb provided in the rear housing 11R is supported by the functional component support member 17 attached to the functional component attachment portion 11Rd provided in the rear housing 11R, and the functional component support member 17 By providing the erroneous insertion prevention convex part 17a, it is possible to eliminate the restriction of the position where the nut 10Gn is attached and the position where the erroneous insertion prevention convex part 17a is provided. Further, a groove having a constant width may be formed inside the functional component support member 17 in the insertion direction of the battery 90 to form a holding portion that holds the guide protrusion 91 of the battery 90. Thereby, the shakiness of the battery 90 caused by the punch taper by the molding using the mold can be eliminated.

<Configuration Example of Switch of this Embodiment>
FIG. 16 is a cross-sectional view illustrating an example of the switch according to the present embodiment. Next, details of the switch 7 according to the present embodiment will be described with reference to the drawings.

  The switch 7 includes a sensor unit 74 having a trigger 70 operated by an operator and a load sensor 71 that receives a pressing force via the trigger 70.

  The trigger 70 is an example of a switch operation part, and is attached to a support part 72 attached to the handle 10H shown in FIG. 1 so as to be movable in directions indicated by arrows F and R. In this example, the pin 700 provided on the trigger 70 enters the elongated hole 720 provided on the support portion 72, so that the trigger 70 is movably attached to the support portion 72, and the movement amount and the movement direction are restricted. Is done.

  The trigger 70 is formed with an operation receiving portion 701 having a curved surface, for example, so that an operation of applying a force in the direction of pulling the surface on one side with a finger can be easily performed. Further, the trigger 70 is formed with a pressing convex portion 702 protruding in the direction of the load sensor 71 on the back surface which is the other side.

  The switch 7 is provided with a coil spring 73 between the trigger 70 and the sensor unit 74, and the trigger 70 is urged by the coil spring 73 in the direction of arrow F, which is a direction away from the load sensor 71.

  In the switch 7, when a force is applied in a direction in which the trigger 70 is pulled with a forefinger that is a predetermined finger of the hand holding the handle 10 </ b> H shown in FIG. 1, the trigger 70 moves in the arrow R direction while compressing the coil spring 73. . Further, when the force pulling the trigger 70 is weakened, the trigger 70 moves in the direction of arrow F by the force restored by the coil spring 73.

  The load sensor 71 forms a pressure-sensitive conductive elastic member 710 whose electrical conductivity changes according to the load, and a variable resistor whose resistance value changes according to the change in the electrical conductivity of the pressure-sensitive conductive elastic member 710. A substrate 711 is provided. The load sensor 71 is provided with a sealing cover 712 that covers the pressure-sensitive conductive elastic member 710 and the substrate 711.

  The pressure-sensitive conductive elastic member 710 has a configuration in which particles having conductivity such as carbon are dispersed in a non-conductive elastic body such as rubber. The pressure-sensitive conductive elastic member 710 is plate-shaped and can be elastically deformed in a direction in which it is bent by receiving a load, and can be elastically deformed in a compressed direction.

  In the substrate 711, a pair of conductor patterns insulated from each other are formed on the surface which is one surface facing the pressure-sensitive conductive elastic member 710, and a wiring 713 is connected to each conductor pattern. The sealing cover 712 includes a pressing portion 714 that presses the pressure-sensitive conductive elastic member 710. The sealing cover 712 is made of an elastic body such as rubber, and an internal space 718 is formed facing the pressure-sensitive conductive elastic member 710.

  The sensor unit 74 includes an intrusion suppression member 740 that suppresses intrusion of foreign matter from the surroundings with respect to the load sensor 71. The intrusion prevention member 740 seals the load sensor cover member 741 that exposes the sealing cover 712 to cover one side of the load sensor 71 and the surface opposite to the sealing cover 712 that is the other side of the load sensor 71. A load sensor support member 742 for stopping is provided.

  The load sensor cover member 741 includes an opening 743 penetrating the front and back of the load sensor cover member 741 at a portion facing the pressing portion 714 of the sealing cover 712. Further, the load sensor cover member 741 is provided with a sandwiching portion 744 provided with a recess having a shape that matches the shape of the sealing cover 712. The load sensor support member 742 includes a sealed space 747 having a predetermined volume with respect to the internal space 718 on the back surface side of the load sensor 71.

  The sensor unit 74 is in a state where the load sensor 71 is inserted into the holding portion 744 of the load sensor cover member 741, and the screw 75 is fastened to the load sensor support member 742, so that the load sensor cover member 741 and the load sensor support member 742 can be connected. A load sensor 71 is sandwiched therebetween.

  When the load sensor 71 is sandwiched between the load sensor cover member 741 and the load sensor support member 742, the sealing cover 712 is pressed, thereby sealing the internal space 718 of the load sensor 71 and the sealed space. 747 is sealed.

  Therefore, in the sensor unit 74, moisture and dust are prevented from entering the internal space 718 of the load sensor 71, and moisture and dust are prevented from entering the back side of the substrate 711. A waterproof and dustproof structure for the pressure-sensitive conductive elastic member 710 and the substrate 711 is realized.

  The sensor unit 74 is attached to the support portion 72 so as to be movable in the directions indicated by the arrows F and R in accordance with the movement direction of the trigger 70. A coil spring 76 is inserted between the sensor unit 74 and the support portion 72, and the sensor unit 74 is biased in the direction of arrow F, which is a direction approaching the trigger 70. Further, the sensor unit 74 is pressed via the trigger 70 by the amount of movement in the direction of the arrow F by being biased by the coil spring 76 when the restricting portion 750 is inserted into the pin 721 provided in the support portion 72. The amount of movement in the direction of the arrow R is restricted. As a result, the sensor unit 74, the coil spring 76, the pin 721, the restricting portion 750, and the like constitute a load relief mechanism.

  In the switch 7, the pressing convex portion 702 of the trigger 70 enters the opening 743 of the load sensor cover member 741 constituting the sensor unit 74 and faces the sealing cover 712 of the load sensor 71.

  In the switch 7, a first malfunction suppression space is formed between the pressing projection 702 of the trigger 70 and the sealing cover 712 of the load sensor 71. In the switch 7, a second malfunction suppression space is formed between the sealing cover 712 and the pressure-sensitive conductive elastic member 710. Further, in the load sensor 71, an insulating space is formed between the pressure-sensitive conductive elastic member 710 and the substrate 711.

  In the state in which the switch 7 has an insulating space formed between the pressure-sensitive conductive elastic member 710 and the substrate 711, the resistance value of the load sensor 71 is infinite, and the load sensor 71 is in a non-conductive state. .

  In the switch 7, when the trigger 70 is pulled, the trigger 70 moves in the direction of the arrow R, whereby the first malfunction suppression space is reduced, and the pressing convex portion 702 contacts the sealing cover 712. When the trigger 70 is further pulled, the pressing convex portion 702 of the trigger 70 presses the sealing cover 712, so that the second malfunction suppression space is reduced, and the sealing cover 712 becomes the pressure-sensitive conductive elastic member 710. Touch.

  When the trigger 70 is further pulled, the pressure-sensitive conductive elastic member 710 is pressed through the trigger 70 and the sealing cover 712, so that the pressure-sensitive conductive elastic member 710 is elastically deformed in the direction in which it is bent. Decreases, and the pressure-sensitive conductive elastic member 710 contacts the substrate 711.

  When the trigger 70 is further pulled, the pressure-sensitive conductive elastic member 710 is pressed through the trigger 70 and the sealing cover 712, so that the pressure-sensitive conductive elastic member 710 is in contact with the substrate 711. The conductive elastic member 710 is elastically deformed in the compressing direction.

  The load sensor 71 has a characteristic that when the pressure-sensitive conductive elastic member 710 is pressed and deformed, the resistance value changes in accordance with the deformation amount. When the amount of deformation of the pressure-sensitive conductive elastic member 710 increases due to an increase in load and the resistance value decreases to a predetermined value, the load sensor 71 becomes conductive. Further, the resistance value further decreases as the amount of deformation of the pressure-sensitive conductive elastic member 710 is increased due to a further increase in load from the state in which the load sensor 71 is conducted.

  As described above, since the pressure-sensitive conductive elastic member 710 is pressed via the trigger 70, the first malfunction suppression space and the second are controlled with respect to the movement amount of the trigger 70 defined by the pin 700 and the elongated hole 720. The total value of the malfunction prevention space and the insulation space is reduced.

  In the switch 7, the coil spring 76 that biases the sensor unit 74 is configured to have a stronger reaction force than the coil spring 73 that biases the trigger 70. Thereby, in the operation of pulling the trigger 70 with a normal force, the pressure-sensitive conductive elastic member 710 is pressed through the trigger 70 and the sealing cover 712 when the trigger 70 moves in the arrow R direction.

  However, if the amount of deformation allowed by the sealing cover 712 and the pressure-sensitive conductive elastic member 710 is exceeded, or if a force greater than a predetermined level is applied to the trigger 70, the coil spring 76 is compressed. The sensor unit 74 moves in the arrow R direction, and the load sensor 71 is retracted.

  Even if the movement amount of the trigger 70 becomes maximum, the trigger 70 is pulled by setting the movement amount of the sensor unit 74 with the pin 721 and the restricting portion 750 so that the sensor unit 74 can move in the arrow R direction. Not only in the process but also in the state where the trigger 70 is fully pulled, the load sensor 71 can be retracted in the direction of the arrow R, and it is possible to suppress the load sensor 71 from being loaded with a predetermined amount or more.

  In addition, when the sealing cover 712 is pressed by the trigger 70 by connecting the internal space 718 and the sealed space 747 with a communication portion 719 (not shown) penetrating the substrate 711, the air in the internal space 718 is transferred to the sealed space 747. Shed.

  Since the sealed space 747 has a sufficiently large volume compared to the internal space 718, the pressure rise is negligible even when air corresponding to the volume reduction of the internal space 718 flows, and the load sensor cover member 741 is sealed. Air leakage from between the stop surface 745 and the sealing surface 748 of the load sensor support member 742 is sufficiently suppressed.

  Thereby, when the pressure of the trigger 70 is released, when the shape of the sealing cover 712 is restored due to the elasticity of the sealing cover 712, the internal space 718 does not become negative pressure, and the elasticity of the sealing cover 712 is reduced. The restoration of the shape by is surely performed.

<Configuration example of forward / reverse selector switch of the present embodiment>
FIG. 17 is a perspective view showing an example of the forward / reverse selector switch of the present embodiment, and FIG. 18 is an exploded perspective view showing an example of the forward / reverse selector switch of the present embodiment. FIG. 19 is a cross-sectional view showing a state in which the forward / reverse selector switch according to this embodiment is attached, and FIG. 20 is a rear view showing a state in which the forward / reverse selector switch according to this embodiment is attached.

  The forward / reverse selector switch 8 is an example of an operation selector switch, and includes a first switch 80L, a second switch unit 80R, and an operation unit 81. The first switch 80L and the second switch 80R are an example of an operation switch unit, and include a push switch that reciprocates with a predetermined stroke and outputs a signal when pressed. The first switch 80 </ b> L is provided on one substrate 82 attached to the support portion 72 of the switch 7. The second switch 80 </ b> R is provided on the other substrate 82 attached to the support portion 72.

  The operation unit 81 includes a first operation unit 81La that receives a force pressed by a person and a first pressing unit 81Lb that presses the first switch 80L. The operation unit 81 includes a second operation unit 81Ra that receives a force pushed by a person and a second pressing unit 81Rb that presses the second switch 80R. Further, the operation unit 81 includes an elastic displacement portion 81c that connects the first pressing portion 81Lb and the second pressing portion 81Rb.

  As for the operation part 81, 1st operation part 81La, 1st press part 81Lb, 2nd operation part 81Ra, 2nd press part 81Rb, and the elastic displacement part 81c are integrally formed by the elastic body.

  The first operation portion 81La protrudes obliquely upward and outward from the first pressing portion 81Lb, and protrudes from the first forward / reverse switch mounting hole portion 19L provided in the rear housing 11R with a predetermined operation recognition amount T1. Thereby, a step is provided between the first operation portion 81La and the handle 10H so that the first operation portion 81La is convex. The first operation portion 81La is provided at a position where it can be operated with the thumb of the right hand when the handle 10H is gripped with the right hand, in this example, above the left side surface of the handle 10H.

  The first pressing portion 81Lb faces the first switch 80L with a predetermined operation recognition gap T2 when the first operation portion 81La is not operated. The operation recognition amount T1 is configured to be longer than the combined length of the stroke of the first switch 80L and the operation recognition gap T2.

  The second operation portion 81Ra protrudes obliquely upward and outward from the second pressing portion 81Rb, and protrudes from the second forward / reverse switch mounting hole portion 19R provided in the rear housing 11R with a predetermined operation recognition amount T1. Thereby, a step is provided between the second operation portion 81Ra and the handle 10H so that the second operation portion 81Ra is convex. When the handle 10H is gripped with the left hand, the second operation portion 81Ra is provided at a position where it can be operated with the thumb of the left hand, in this example, above the right side surface of the handle 10H.

  The second pressing portion 81Rb is opposed to the second switch 80R with a predetermined operation recognition gap T2 when the second operation portion 81Ra is not operated. The operation recognition amount T1 is configured to be longer than the total length of the stroke of the second switch 80R and the operation recognition gap T2.

  The forward / reverse selector switch 8 includes the first operation portion 81La and the second operation portion 81Ra within a range where the thumb or forefinger of the hand can reach when the handle 10H is grasped by hand so that the trigger 70 can be operated. The Therefore, as shown in FIG. 2 and the like, the forward / reverse selector switch 8 is provided with a first operation portion 81La and a second operation portion 81Ra above the trigger 70 of the switch 7 along the extending direction of the handle 10H. . For this reason, the first operation unit 81La and the second operation unit 81Ra receive a force mainly operated from obliquely downward to upward. Accordingly, the first operation unit 81La and the second operation unit 81Ra are directed downward along the direction in which the force is applied to the position where the finger can be operated with the finger holding the handle 10H, as shown in FIG. Thus, a tapered surface is formed.

  The elastic displacement portion 81c connects the first pressing portion 81Lb and the second pressing portion 81Rb provided on the left and right of the handle 10H, and forward / reverse switch mounting portions 19c provided on both side surfaces of the rear handle portion 13R of the rear housing 11R. It is configured in a shape that fits.

  The operation unit 81 is an operation of pushing the first operation unit 81La and an operation of releasing the pushed first operation unit 81La, and mainly the elastic displacement portion 81c is elastically deformed, whereby the first pressing unit 81Lb is the first It is displaced in the direction to be separated from or connected to the switch 80L.

  In addition, the operation portion 81 is operated by pushing the second operation portion 81Ra and releasing the pushed second operation portion 81Ra, and mainly the elastic displacement portion 81c is elastically deformed, whereby the second pressing portion 81Rb is The second switch 80R is displaced toward and away from the second switch 80R.

<Operational effect example of forward / reverse selector switch according to this embodiment>
When the operation portion 81 is not attached to the forward / reverse switch attachment portion 19c, the outer dimension of the elastic displacement portion 81c is the inner dimension of the forward / reverse switch attachment portion 19c along the left / right direction of the rear handle portion 11R. Configured to be wider.

  In the operation portion 81, the elastic displacement portion 81c is inserted into the forward / reverse switch mounting portion 19c from the dividing surface 14R of the rear housing 11R. When the operation portion 81 is attached to the forward / reverse switch attachment portion 19c, the elastic displacement portion 81c is biased in a direction in which the interval is widened outward due to elastic deformation of the elastic displacement portion 81c. Therefore, the operation part 81 is prevented from being carelessly detached from the rear housing 11R, and the assembling property of the operation part 81 is improved. In addition, rattling of the operation unit 81 is suppressed. Furthermore, since the operation part 81 is comprised with an integral component, a number of parts is reduced and an assembly property improves.

  The switch 7 is inserted into the switch mounting portion 19d provided on the rear housing 11R from the dividing surface 14R of the rear housing 11R. When the switch 7 is attached to the switch attachment portion 19d, the first switch 80L and the first pressing portion 81Lb face each other, and the second switch 80R and the second pressing portion 81Rb face each other.

  A predetermined operation recognition gap T2 is formed between the first switch 80L and the first pressing portion 81Lb, and a predetermined operation recognition gap is formed between the second switch 80R and the second pressing portion 81Rb. T2 is formed.

  Thereby, the operation part 81 and the switch 7 can be easily and reliably attached to the rear housing 11R divided in the front-rear direction.

  When the operation portion 81 is attached to the forward / reverse switch attachment portion 19c, the first operation portion 81La protrudes from the first forward / reverse switch attachment hole portion 19L with a predetermined operation recognition amount T1. In addition, the second operation portion 81Ra protrudes from the second forward / reverse switch mounting hole portion 19R with a predetermined operation recognition amount T1.

  The first operation unit 81La and the second operation unit 81Ra are provided at positions that can be operated by a finger of a hand holding the handle 10H. When the first operation portion 81La is pressed, the first pressing portion 81Lb is displaced in a direction approaching the first switch 80L while the elastic displacement portion 81c is elastically deformed.

  When the first operation portion 81La is further pressed, the operation recognition gap T2 disappears, the first pressing portion 81Lb comes into contact with the first switch 80L, and the first switch 80L is pressed. When the first switch 80L is pressed by a predetermined amount, a signal is output. When the first operation portion 81La is pressed, the operation portion 81 is capable of displacing the first operation portion 81La independently of the second operation portion 81Ra by elastically deforming the elastic displacement portion 81c.

  When the force that presses the first operation portion 81La is loosened, the elastic displacement portion 81c is restored, so that the first pressing portion 81Lb is separated from the first switch 80L, and the signal changes.

  When the second operation portion 81Ra is pressed, the second pressing portion 81Rb is displaced in a direction approaching the second switch 80R while the elastic displacement portion 81c is elastically deformed.

  When the second operation portion 81Ra is further pressed, the operation recognition gap T2 disappears, the second pressing portion 81Rb comes into contact with the second switch 80R, and the second switch 80R is pressed. When the second switch 80R is pressed by a predetermined amount, a signal is output. When the second operation portion 81Ra is pressed, the operation portion 81 is capable of displacing the second operation portion 81Ra independently of the first operation portion 81La by elastically deforming the elastic displacement portion 81c.

  When the force pushing the second operation portion 81Ra is loosened, the elastic displacement portion 81c is restored, so that the second pressing portion 81Rb is separated from the second switch 80R, and the signal changes.

  When the first operation unit 81La is not operated, a step in which the first operation unit 81La is convex is provided between the first operation unit 81La and the handle 10H. The position of the first operation unit 81La can be easily recognized. Further, when the second operation portion 81Ra is not operated, a step in which the second operation portion 81Ra is convex is provided between the second operation portion 81Ra and the handle 10H. Thus, the position of the second operation portion 81Ra can be easily recognized.

  By providing the operation recognition gap T2 between the first pressing portion 81Lb and the first switch 80L, in the operation of pressing the first operation portion 81La, the first operation portion 81La due to elastic deformation of the elastic displacement portion 81c. By this displacement, a displacement amount for pressing the first switch 80L is secured. Thereby, it becomes easy to obtain an operation feeling of pressing the first operation unit 81La, and erroneous operations can be suppressed. Further, since the first pressing portion 81Lb is biased outward by the elastic deformation of the elastic displacement portion 81c, the operational feeling is improved.

  Since the operation recognition gap T2 is provided between the second pressing portion 81Rb and the second switch 80R, in the operation of pressing the second operation portion 81Ra, the second operation portion 81Ra due to the elastic deformation of the elastic displacement portion 81c. The displacement amount for pressing the second switch 80R is ensured by this displacement. Thereby, it becomes easy to obtain an operational feeling of pressing the second operation unit 81Ra, and erroneous operations can be suppressed. Further, since the second pressing portion 81Rb is urged outward by the elastic deformation of the elastic displacement portion 81c, the operational feeling is improved.

  In this way, the first operation portion 81La is biased outward by the elastic deformation of the elastic displacement portion 81c and protrudes from the first forward / reverse switch mounting hole portion 19L of the handle 10H. An operation recognition gap T2 is provided between the first pressing portion 81Lb and the first switch 80L. Further, due to the elastic deformation of the elastic displacement portion 81c, the second operation portion 81Ra is urged outward and protrudes from the second forward / reverse switch mounting hole portion 19R of the handle 10H. An operation recognition gap T2 is provided between the second pressing portion 81Rb and the second switch 80R.

  Thereby, even if it is an operation changeover switch using a switch with few strokes like a push switch, since the 1st operation part 81La can ensure a fixed operation stroke, when there is no operation intention, the 1st operation It can suppress that the 1st press part 81Lb of the part 81La presses the 1st switch 80L. Further, since the second operation portion 81Ra can secure a constant operation stroke, it is possible to prevent the second pressing portion 81Rb of the second operation portion 81Ra from pressing the second switch 80R when there is no intention of operation. it can. Therefore, erroneous operation can be prevented.

  Furthermore, since the first operation portion 81La and the second operation portion 81Ra protrude outward from the handle 10H, a reliable operation can be performed without relying on vision, and a switching operation such as forward / reverse rotation can be performed quickly. Can do.

  In addition, since the first operation unit 81La and the second operation unit 81Ra are provided above the trigger 70 of the switch 7, the first operation unit 81La and the second operation unit are operated during normal use of operating the trigger 70. 81Ra does not hinder the operation, and when the first operation unit 81La and the second operation unit 81Ra are operated, it is not necessary to change the handle 10H, and the operation can be performed easily and quickly.

  Further, the first operation portion 81La and the second operation portion 81Ra are formed with tapered surfaces so as to be directed downward along the direction in which the force is applied at positions where the first operation portion 81La and the second operation portion 81Ra can be operated by the finger of the hand holding the handle 10H. Therefore, it is possible to reliably transmit the operation force and to displace the first operation unit 81La and the second operation unit 81Ra.

  The operating portion 81 is configured to be supported by the forward / reverse switch mounting portion 19c of the rear housing 11R by the elastic displacement portion 81c, and does not support the first operating portion 81La by the first forward / reverse switch mounting hole portion 19L. The second operation portion 81Ra is not supported by the second forward / reverse switch mounting hole portion 19R.

  Thereby, a predetermined degree of freedom can be provided in the direction in which the first operation unit 81La and the second operation unit 81Ra are displaced. Therefore, the first operation unit 81La and the second operation unit are displaced from the direction along the direction in which the mover of the first switch 80L and the second switch 80R strokes, for example, obliquely from above to below. Even if a force for pressing 81Ra is applied, the first pressing portion 81Lb and the second pressing portion 81Rb can be displaced, so that the first switch 80L and the second switch 80R can be operated.

  Therefore, the operability can be improved by using the above-described various effects even when a switch with a small stroke such as a push switch is used.

<Modified example of forward / reverse selector switch of this embodiment>
FIG. 21 is a front view showing a modified example of the forward / reverse selector switch of the present embodiment. The first operation unit 81La and the second operation unit 81Ra are not only configured to be displaced by horizontal movement, but may be configured to be displaced by swinging, for example.

  As shown in FIG. 2 and the like, the forward / reverse selector switch 8 is provided with a first operation portion 81La and a second operation portion 81Ra above the trigger 70 of the switch 7 along the extending direction of the handle 10H. For this reason, the first operation unit 81La and the second operation unit 81Ra receive a force mainly operated from obliquely downward to upward.

  Therefore, a shaft 83L is provided below the first operation portion 81La, and the first operation portion 81La is moved away from and in contact with the first switch 80L shown in FIG. Displace. Further, a shaft 83R is provided below the second operation portion 81Ra, and the second operation portion 81Ra is moved away from and in contact with the second switch 80R shown in FIG. Displace.

  The first operation portion 81La may be integrated with or separated from the first pressing portion 81Lb. In addition, the second operation portion 81Ra may be integrated with or separated from the second pressing portion 81Rb. Further, the first pressing portion 81Lb and the second pressing portion 81Rb may be integrated with or separated from the elastic displacement portion 81c. The shaft 83L may be provided on the upper part of the first operation unit 81La, and the shaft 83R may be provided on the upper part of the second operation unit 81Ra. Furthermore, the direction of the axis may be a direction along the axial direction of the brushless motor 2 or may be inclined.

  Therefore, even if the first operation unit 81La and the second operation unit 81Ra are displaced by swinging, it is possible to improve operability by using a switch with a small stroke such as a push switch.

<Example of control function of impact driver of this embodiment>
FIG. 22 is a functional block diagram illustrating an example of the control function of the impact driver of the present embodiment. The impact driver 1 </ b> A includes a control unit 110 that controls the brushless motor 2 and the like according to the operation of the switch 7 and the forward / reverse selector switch 8. The impact driver 1 </ b> A includes a drive unit 111 that drives the brushless motor 2.

  The control unit 110 is configured with a control circuit mounted on the control board 100, the drive unit 111 is configured with a drive circuit mounted on the drive board 101, and the control unit 110 includes the load sensor 71 of the switch 7, The brushless motor 2 is controlled based on a combination of signals output from the first switch 80L and the second switch 80R of the reverse switch 8.

  Further, the control unit 110 performs various operation settings based on a combination of signals output from the first switch 80L and the second switch 80R of the forward / reverse selector switch 8, and displays the setting contents on the display unit 110a. In addition, it is stored in the storage unit 110b. The display unit 110a is configured by, for example, a lamp such as an LED, and outputs the setting contents by a combination of presence / absence of lighting, blinking, presence / absence of lighting of a plurality of lamps, and the like.

  The control unit 110 detects the rotation direction, the rotation speed, and the like of the brushless motor 2 that is the rotation direction of the rotor 20 from the output of the hall sensor 102a, and in this example, by the PWM (Pulse Width Modulation) method, The brushless motor 2 is controlled by supplying a current in a pattern controlled by the drive unit 111 to the drive coil 22.

<Examples of effects of control function of impact driver of this embodiment>
The forward / reverse selector switch 8 includes a first switch 80L and a second switch 80R that are configured as push switches as operation switch units, so that one or both of them are pressed simultaneously for a predetermined time. It is possible to recognize an operation such as a long press and control according to the operation.

  Thereby, in the control part 110, predetermined | prescribed operation of the forward / reverse changeover switch 8 is started and stopped of the impact driver 1A, and the switch 7 is locked by software, for example, in addition to the forward / reverse rotation switching of the brushless motor 2. It can be assigned to unlocking.

  In the conventional configuration in which the rotation direction of the motor can be switched by pushing the operating part protruding on one side of the handle and displacing it to the position protruding on the other side, the setting of the rotation direction of the motor is either forward rotation or reverse rotation. I was able to recognize it by tactile sensation with my fingers and visual recognition with my eyes. On the other hand, in a configuration using a push switch with a small stroke, recognition by tactile sense or visual recognition becomes difficult.

  Therefore, the control unit 110 performs the first forward / reverse rotation switching operation mode in which the brushless motor 2 is rotated forward or backward only while operating either the first operation unit 81La or the second operation unit 81Ra. Prepare.

  Further, the control unit 110 sets the rotation direction to, for example, normal rotation when the first operation unit 81La is operated, and to reverse rotation, for example, when the second operation unit 81Ra is operated, and the first operation unit 81La and the first operation unit 81La A second forward / reverse rotation switching operation mode that follows the conventional operation method in which the set rotation direction is maintained without continuing the operation of the second operation unit 81Ra is provided.

  The forward / reverse rotation switching operation mode is changed to the first forward / reverse rotation switching operation mode or the second forward / reverse rotation switching operation mode by, for example, a predetermined operation of the first operation unit 81La and the second operation unit 81Ra. Is set.

  When the forward / reverse rotation switching operation mode is set to the first forward / reverse rotation switching operation mode, the controller 110 selects one of the first switch 80L and the second switch 80R in the forward / reverse switching switch 8. To the brushless motor 2 is assigned an operation for switching between normal rotation and reverse rotation.

  In the following description, a state where the trigger 70 of the switch 7 is pulled and the load sensor 71 is pressed is referred to as ON of the load sensor 71, and a state where it is not pressed is referred to as OFF of the load sensor 71. In addition, the first switch 80L and the second switch 80R are pressed when the first switch 80L and the second switch 80R are pressed, and the first switch 80L and the second switch 80R are pressed when the first switch 80L and the second switch 80R are not pressed. Turn 80R off.

  In the case of operating with the right hand, for example, an operation of switching between normal rotation and reverse rotation of the brushless motor 2 to the first switch 80L operated by the first operation unit 81La that can be operated with the thumb of the right hand holding the handle 10H. Assign.

  When the first operation unit 81La is not pressed and the first switch 80L is off and the trigger 70 of the switch 7 is pulled and the load sensor 71 is turned on, the control unit 110 turns the brushless motor 2 on. Rotate in the positive direction. Further, the rotational speed of the brushless motor 2 is controlled by the magnitude of the force applied to the trigger 70.

  When the trigger 70 of the switch 7 is pulled and the load sensor 71 is turned on and the first operation portion 81La is pushed and the first switch 80L is turned on, the control unit 110 turns the brushless motor 2 in the reverse direction. Rotate. Further, the rotational speed of the brushless motor 2 is controlled by the magnitude of the force applied to the trigger 70. Alternatively, when the trigger 70 of the switch 7 is pulled while the first operation portion 81La is pressed and the first switch 80L is on, the brushless motor 2 is reversed.

  Thereby, in the state where the trigger 70 is pulled, the first switch 80L is turned on and off by pressing and releasing the first operation portion 81La, so that the forward rotation and the reverse rotation of the brushless motor 2 are performed. Can be switched. Further, during the operation in which the first operation unit 81La is being pressed, the state in which the brushless motor 2 is reversed is maintained, and the trigger 70 is being pulled and the first operation unit 81La is being pressed. The brushless motor 2 reverses.

  In the state where the trigger 70 is pulled and the load sensor 71 is on, the forward rotation of the brushless motor 2 can be performed even if the first switch 80L is switched on and off by pressing and releasing the first operation portion 81La. The first switch 80L is turned on and off by pressing and releasing the first operation portion 81La after the force pulling the trigger 70 is loosened and the load sensor 71 is turned off. When switched, the forward / reverse switching may be set. Thus, in the state where the trigger 70 is pulled and the load sensor 71 is on, even if the first operation unit 81La is operated, the operation is invalidated and the operation is not switched, and the previous operation is maintained. Unintentional reversal of the rotation direction due to an erroneous operation such as erroneously pressing the first operation unit 81La can be suppressed.

  In the case of operating with the left hand, for example, an operation of switching between normal rotation and reverse rotation of the brushless motor 2 to the second switch 80R operated by the second operation unit 81Ra that can be operated with the thumb of the left hand holding the handle 10H. Assign.

  When the second operation unit 81Ra is not pressed and the second switch 80R is turned off and the trigger 70 of the switch 7 is pulled and the load sensor 71 is turned on, the control unit 110 turns the brushless motor 2 on. Turn forward. Further, the rotational speed of the brushless motor 2 is controlled by the magnitude of the force applied to the trigger 70.

  The control unit 110 reverses the brushless motor 2 when the trigger 70 of the switch 7 is pulled and the load sensor 71 is turned on, and the second operation unit 81Ra is pushed and the second switch 80R is turned on. Further, the rotational speed of the brushless motor 2 is controlled by the magnitude of the force applied to the trigger 70. Alternatively, when the trigger 70 of the switch 7 is pulled while the second operation unit 81Ra is pressed and the second switch 80R is turned on, the brushless motor 2 is reversed.

  As a result, the second switch 80R is turned on and off by pressing and releasing the second operation portion 81Ra while the trigger 70 is pulled, so that the forward and reverse rotations of the brushless motor 2 can be performed. Can be switched. During the operation in which the second operation unit 81Ra is being pressed, the brushless motor 2 is maintained in the reverse rotation state, and the trigger 70 is being pulled while the second operation unit 81Ra is being pressed. The brushless motor 2 reverses.

  When the trigger 70 is pulled and the load sensor 71 is on, the brushless motor 2 is rotated forward even if the second switch 80R is turned on and off by pressing and releasing the second operation portion 81Ra. The first switch 80L is turned on and off by pressing and releasing the first operation portion 81La after the force pulling the trigger 70 is loosened and the load sensor 71 is turned off. When switched, the forward / reverse switching may be set. Thus, in the state where the trigger 70 is pulled and the load sensor 71 is on, even if the second operation unit 81Ra is operated, the operation is invalidated and the operation is not switched, and the previous operation is maintained. Unintentional reversal of the rotation direction due to an erroneous operation such as erroneously pressing the second operation portion 81Ra can be suppressed.

  In addition, the brushless motor 2 is reversed when the first switch 80L or the second switch 80R is on, but the operation of the trigger 70 when the first switch 80L or the second switch 80R is off is performed. Thus, the brushless motor 2 may be reversed.

  In this case, during the operation in which the first operation unit 81La is being pressed, the forward rotation state of the brushless motor 2 is maintained, and the first operation unit 81La is pressed in a state in which the trigger 70 is being pulled. While it is, the brushless motor 2 rotates normally. Further, during the operation in which the second operation unit 81Ra is being pressed, the state in which the brushless motor 2 is normally rotated is maintained, and the second operation unit 81Ra is being pressed while the trigger 70 is being pulled. During this time, the brushless motor 2 rotates forward.

  As described above, the brushless motor 2 can be rotated in the reverse direction or the normal direction only when the first operation unit 81La or the second operation unit 81Ra is operated, so that it is possible to grasp which rotation direction is set. It is easy and does not need to be confirmed visually. Conventionally, in the operation of alternately rotating forward and reverse, the switching operation is performed every time before the trigger 70 is pulled. However, in this example, the first operation unit 81La or only during reverse rotation or only during forward rotation What is necessary is just to perform operation which pushes 2nd operation part 81Ra, and it can carry out easily and rapidly.

  As a result, the operation of the switch 7 and the operation of the forward / reverse selector switch 8 can be combined to switch the operation in software, the forward rotation and the reverse rotation can be easily recognized, and the operation can be switched. Can be done quickly.

  When the forward / reverse rotation switching operation mode is set to the second forward / reverse rotation switching operation mode, the control unit 110 turns on the brushless motor 2 when the first switch 80L is turned on by pressing the first operation unit 81La. Is set to, for example, normal rotation. Even if the first switch 80L is turned off by releasing the finger from the first operation portion 81La, the setting of the rotation direction is maintained.

  Further, when the second switch 80R is turned on by pressing the second operation portion 81Ra, the rotation direction of the brushless motor 2 is set to, for example, reverse rotation. Even when the second switch 80R is turned off by releasing the finger from the second operation portion 81Ra, the setting of the rotation direction is maintained.

  The setting of the rotation direction by the operation of the first operation unit 81La or the second operation unit 81Ra may be notified by the display unit 110a. In addition, the setting of the rotation direction at the time of operation of 1st operation part 81La and 2nd operation part 81Ra may be reverse.

  When the trigger 70 of the switch 7 is pulled and the load sensor 71 is turned on, the control unit 110 rotates the brushless motor 2 in the rotation direction set by the operation of the first operation unit 81La or the second operation unit 81Ra. . Further, the rotational speed of the brushless motor 2 is controlled by the magnitude of the force applied to the trigger 70. At this time, the finger may be separated from the first operation unit 81La and the second operation unit 81Ra.

  In the state where the trigger 70 is pulled and the load sensor 71 is turned on, even if the first operation unit 81La or the second operation unit 81Ra is pressed, the brushless motor 2 is not switched between forward rotation and reverse rotation. Once the force pulling the trigger 70 is loosened and the load sensor 71 is turned off, the first operation unit 81La or the second operation unit 81Ra is pressed so that switching between forward rotation and reverse rotation can be performed. Anyway.

  As described above, when the trigger 70 is pulled and the load sensor 71 is turned on, even if the first operation unit 81La or the second operation unit 81Ra is operated, the operation is invalidated and the operation is not switched. By maintaining the operation, it is possible to suppress unintended reversal of the rotation direction due to an erroneous operation such as accidentally pushing the first operation unit 81La or the second operation unit 81Ra.

  In the second forward / reverse rotation switching operation mode, the rotation direction is set in advance by the operation of the first operation unit 81La or the second operation unit 81Ra, and the trigger 70 is pulled, so that the first operation unit 81La and the second operation unit 81La Since the brushless motor 2 can be rotated in the set rotation direction with the finger removed from the second operation portion 81Ra, the operation can be performed following the operation method of the conventional apparatus.

  As a result, in a work in which forward / reverse switching is frequently performed, the rotation direction is switched by pressing the first operation unit 80La and the second operation unit 80Ra alternately by setting the first forward / reverse rotation switching operation mode. No operation is required, and the frequency of pressing the first operation unit 80La and the second operation unit 80Ra can be reduced and work can be performed quickly. On the other hand, in an operation where the forward / reverse switching frequency is low, setting the second forward / reverse rotation switching operation mode eliminates the need for an operation while pressing the first operation unit 80La or the second operation unit 80Ra. Therefore, the operation can be easily performed.

  FIG. 23 is a flowchart showing an example of the operation of the impact driver according to the present embodiment. FIG. 24 is a process diagram showing an example of the operation of the impact driver according to the present embodiment. An example in which two steel materials are applied to the operation of fastening with a screw will be described.

  In a state where the trigger 70 of the switch 7 is not pulled, the control unit 110 holds the state where the rotation of the brushless motor 2 is stopped in step SA1 in FIG. In step SA2 in FIG. 23, the control unit 110 turns on the load sensor 71 by pulling the trigger 70 of the switch 7 when the first operation unit 81La is not pressed and the first switch 80L is off. In step SA3, the brushless motor 2 is rotated in the positive direction.

  In the operation of fastening the first steel material 201 and the second steel material 202 with the screw 200 shown in FIG. 24, when the screw 200 is fastened from the first steel material 201 side, the operator pulls the trigger 70, thereby brushless. As shown in FIG. 24A, the motor 2 rotates forward, and the screw 200 advances in the direction of the arrow F1 and is fastened to the first steel material 201.

  When the tip of the screw 200 reaches the second steel material 202, the screw 200 is initially not penetrated into the second steel material 202 due to the penetration resistance of the second steel material 202, and rotates without proceeding in the direction of the arrow F1. When the screw 200 rotates without penetrating into the second steel material 202, the first steel material 201 moves in the direction of the arrow R2 away from the second steel material 202 as shown in FIG.

  After the screw 200 has penetrated into the second steel material 202, the screw 200 advances again in the direction of the arrow F1, but the gap generated between the first steel material 201 and the second steel material 202 cannot be eliminated. Therefore, in order to rotate the screw 200 in the loosening direction, the operator pushes the first operation portion 81La when pulling the trigger 70 and operating with the right hand. If the operation is performed with the left hand, the second operation unit 81Ra is pressed.

  When the trigger 70 of the switch 7 is pulled and the load sensor 71 is on and the controller 110 is operated with the right hand, the controller 110 performs the first operation by operating the forward / reverse selector switch 8 in step SA4 in FIG. When the part 81La is pressed and the first switch 80L is turned on, the brushless motor 2 is reversed in step SA5. In the setting to operate with the left hand, when the second operation portion 81Ra is pressed and the second switch 80R is turned on by operating the forward / reverse selector switch 8 in step SA4, the brushless motor 2 is turned on in step SA5. Reverse.

  When the screw 200 is retracted in the direction of the arrow R1 until the screw 200 is pulled out from the second steel material 202 by the reverse rotation of the brushless motor 2, as shown in FIG. The steel material 202 can be brought into contact again, and the gap can be eliminated.

  When the operator brings the first steel material 201 and the second steel material 202 into contact with each other by the operation of loosening the screw 200, the operator releases the first operation portion 81La in the case of operating with the right hand while pulling the trigger 70. . If the operation is performed with the left hand, the second operation unit 81Ra is released.

  When the trigger 70 of the switch 7 is pulled and the load sensor 71 is on and the control unit 110 is operated with the right hand, the control unit 110 releases the finger from the first operation unit 81La in step SA6 in FIG. When the first switch 80L is turned off by operating the forward / reverse switching switch 8 such as loosening the force that pushes the operation portion 81La, the brushless motor 2 is rotated forward in step SA7. In the setting to operate with the left hand, in step SA6, the second switch is operated by operating the forward / reverse selector switch 8 such as releasing the finger from the second operation unit 81Ra or loosening the pressing force of the second operation unit 81Ra. When 80R is turned off, the brushless motor 2 is rotated forward in step SA7.

  When the brushless motor 2 rotates in the forward direction, the screw 200 advances in the direction of the arrow F1 as shown in FIG. When retightening, since the penetration resistance into the second steel material 202 is small, the screw 200 penetrates into the second steel material 202 without idling, and the first steel material 201 and the second steel material 202 are fastened. Is done.

  When the first steel material 201 and the second steel material 202 are fastened by the screw 200, the operator loosens the force pulling the trigger 70 and releases the finger. When the load sensor 71 is turned off by releasing the finger from the trigger 70 in step SA8 of FIG. 23, the control unit 110 stops the rotation of the brushless motor 2 in step SA9.

  Conventionally, when an operation of fastening a screw and an operation of loosening are performed continuously, it is necessary to release the finger from the trigger once. For this reason, work has taken time. On the other hand, in the present embodiment, when the operation of fastening the screw and the operation of loosening are performed continuously, the first operation portion 81La or the second operation switch 81La of the forward / reverse selector switch 8 is not released without releasing the finger from the trigger 70. By operating the operation portion 81Ra, the forward rotation and the reverse rotation of the brushless motor 2 can be switched. Thereby, when it is necessary to perform the operation | movement which fastens with respect to one screw | thread, and the operation | movement which loosens, it can work quickly.

  Compared with the conventional operation method that pushes the operation part on one side of the handle to switch the rotation direction of the motor to forward rotation and pushes the operation part on the other side to switch to reverse rotation, the frequency of pushing the operation part is reduced and quicker Can work on. Furthermore, since the first operation unit 81La and the second operation unit 81Ra are provided at positions that can be easily operated regardless of whether the handle 10H is gripped by the right hand or the left hand, the operation is easy regardless of the dominant hand. Become. Further, since it is possible to switch between normal rotation and reverse rotation by only one operation on the side that is easy to operate with the first operation unit 81La and the second operation unit 81Ra, in addition to simple operation, the handle 10H There is no need to carry it over, and it is possible to perform a quick work.

  FIG. 25 is a flowchart showing another example of the operation of the impact driver according to the present embodiment. Hereinafter, the operation for locking the trigger 70 in software by the forward / reverse selector switch 8 will be described with reference to each drawing. To do.

  In a state where the trigger 70 of the switch 7 is not pulled, the control unit 110 holds the state where the rotation of the brushless motor 2 is stopped in step SB1 of FIG. When the first operation unit 81La is pressed and held for a predetermined time by the operation of the forward / reverse selector switch 8 in step SB2 and the first switch 80L is turned on for a predetermined time, the control unit 110 is in the locked state in step SB3. It is determined whether or not. In the process of step SB2, even when the second operation unit 81Ra is pressed and held for a predetermined time by operating the forward / reverse selector switch 8, the trigger 70 is activated in step SB3. It is determined whether or not it is locked. Furthermore, even when the first operation unit 81La and the second operation unit 81Ra are pressed for a long time and the first switch 80L and the second switch 80R are turned on for a predetermined time, the trigger 70 is locked in step SB3. It is determined whether or not.

  If the control unit 110 determines that the lock of the trigger 70 is not set when one or both of the operation units is long pressed by the forward / reverse selector switch 8, the trigger 70 is set in step SB4 in FIG. Is set to lock by software. Software lock indicates a state in which the operation is invalidated without rotating the brushless motor 2 even when the load sensor 71 is turned on.

  When the trigger 70 is locked, the control unit 110 notifies the display unit 110a that the trigger 70 is set to be locked in step SB5 of FIG. For example, the operator is notified so that the trigger 70 is locked by turning on a predetermined lamp or the like.

  In addition, in step SB6 in FIG. 25, the control unit 110 stores in the storage unit 111a that the trigger 70 is locked. The storage unit 111a can hold information even when the power is cut off, and holds the state where the trigger 70 is locked even after the battery 90 is detached.

  If the control unit 110 determines that the trigger 70 is set to lock when one or both of the operation units is long pressed by the forward / reverse selector switch 8, the control unit 110 determines that the trigger 70 is set in step SB7 in FIG. unlock. Thereby, when the load sensor 71 is turned on, the brushless motor 2 is controlled according to the load.

  When the lock of the trigger 70 is released, the control unit 110 notifies the display unit 110a that the setting of the lock of the trigger 70 is released in step SB8 of FIG. For example, the operator is notified so that the trigger 70 is unlocked by turning off a predetermined lamp.

  In addition, in step SB9 of FIG. 25, the control unit 110 stores in the storage unit 111a that the trigger 70 is unlocked. The storage unit 111a can hold information even when the power is cut off, and holds that the trigger 70 is unlocked even after the battery 90 is detached.

  Thereby, the trigger 70 can be locked and unlocked by using the forward / reverse selector switch 8. If the trigger 70 and the forward / reverse selector switch 8 are determined not to be operated for a certain period of time in addition to the trigger 70 being locked and unlocked by long-pressing the forward / reverse selector switch 8, the process shifts to the lock setting and forward / reverse switching The lock may be released by pressing the switch 8 for a long time.

  FIG. 26 is a flowchart showing another example of the operation of the impact driver according to the present embodiment. Hereinafter, the operation of switching the setting by the forward / reverse selector switch 8 will be described with reference to each drawing.

  In a state where the trigger 70 of the switch 7 is not pulled, the control unit 110 holds the state where the rotation of the brushless motor 2 is stopped in step SC1 of FIG. In step SC2, the control unit 110 operates the forward / reverse selector switch 8 to simultaneously press the first operation unit 81La and the second operation unit 81Ra, so that the first switch 80L and the second switch 80R are simultaneously turned on. Then, the setting is switched in step SC3. For example, the setting of the torque level of the brushless motor 2 is switched according to the number of times the first switch 80L and the second switch 80R are turned on.

  Further, the combination of the operation of the switch 7 and the operation of the forward / reverse switching switch 8 may be assigned to switching of settings instead of switching between forward rotation and reverse rotation of the brushless motor 2. For example, when the trigger 70 is pulled in a state where the first operation unit 81La or the second operation unit 81Ra is pressed, the setting may be switched. In this case, it is easy to change the setting with one hand.

  Furthermore, when the first operation unit 81La and the second operation unit 81Ra are pressed at the same time, the setting to be changed is called, and the setting can be changed by a combination of the operation of the switch 7 and the operation of the forward / reverse selector switch 8. May be. In this case, even if the types of settings that can be changed are increased, each setting can be easily recognized.

  When the trigger 70 is pulled and the load sensor 71 is turned on at step SC4 in FIG. 26, the control unit 110 controls the brushless motor 2 according to the load applied to the load sensor 71 and the setting at step SC5. When the load sensor 71 is turned off by releasing the finger from the trigger 70 in step SC6 of FIG. 26, the control unit 110 stops the rotation of the brushless motor 2 in step SC7. Note that the control unit 110 may notify the display unit 110a that various settings have been switched, or may notify by voice or the like.

<Modified example of electric power tool of the present embodiment>
In the above description, an example of an impact driver is described as an electric tool, but the present invention can be applied to an electric driver that does not have a striking mechanism, an electric saw, an electric file, and the like. Moreover, although the brushless motor was demonstrated to the example as a drive part, a drive motor may be sufficient as a drive part.

  FIG. 27 is a configuration diagram illustrating a modified example of the electric power tool according to the present embodiment. In the electric power tool 1 </ b> B, the driving force of the motor 200 that is the driving unit is transmitted to the chuck 600 that is the driven unit via the speed reducer 400 and the bevel gear 201.

  In the electric power tool 1B, the axial direction of the shaft 200a of the motor 200 and the axial direction of the output shaft 601 that is the axis of the chuck 600 are nonparallel, and the rear housing 110R that is the first housing and the second housing. The front housing 110 </ b> F is divided in the front-rear direction along the axial direction of the output shaft 601.

  In the output shaft 601, a bearing 602R inserted on one side is supported by a shaft support portion 130R provided in the rear housing 110R. Further, the bearing 602F inserted on the other side is supported by a shaft support portion 130F provided on the front housing 110F.

  The speed reducer 400 is constituted by a planetary gear, and the shaft 400a of the speed reducer 400 and the shaft 200a of the motor 200 are arranged on the same axis. In the speed reducer 400, the bearing 401 inserted into the shaft 400a is supported by the shaft support portion 130 provided in the rear housing 110R and the front housing 110F. The shaft support portion 130 is divided by the dividing surface 140 of the rear housing 110R and the front housing 110F.

  The rear housing 110R includes a hole 160R to which a screw 150 for attaching the front housing 110F to the rear housing 110R is fastened. The front housing 110F includes a hole 160F into which the screw 150 is inserted.

  The hole 160R, the hole 160F, and the screw 150 are an example of a locking portion that integrates the rear housing 110R and the front housing 110F. The hole 160R and the hole 160F extend along the axial direction of the output shaft 601. Since the front housing 110 </ b> F and the rear housing 110 </ b> R are divided in the front-rear direction, the screw 150 fastens the front housing 110 </ b> F and the rear housing 110 </ b> R along the axial direction of the output shaft 601.

  In a configuration in which the axial direction of the shaft 200a of the motor 200 that is the output shaft of the driving unit and the axial direction of the output shaft 601 of the chuck 600 that is the driven unit are non-parallel, the axial direction of the output shaft 601 of the driven unit is The rear housing 110 </ b> R and the front housing 110 </ b> F are divided in the front-rear direction along the length, so that the length along the axial direction of the output shaft 601 can be shortened.

  Further, the battery mounting portion 9 has been described with reference to FIG. 11 or the like even in the configuration in which the rear housing 110R and the front housing 110F are divided in the front-rear direction along the axial direction of the output shaft 601 that is not parallel to the axial direction of the motor 200. The configuration may be the same, and the battery 90 is inserted into and removed from the electric power tool 1B by moving the output shaft 601 in the front-rear direction along the axial direction.

  That is, the rear housing 110R is provided with the rear rail portion 9R, and the front housing 110F is provided with the front rail portion 9F to constitute the guide rail portion 9A. The guide convex portion 91 of the battery 90 is held by both the rear rail portion 9R of the rear housing 110R and the front rail portion 9F of the front housing 110F.

  Thereby, the guide convex part 91 of the battery 90 can be held at two points near the front end part and the rear end part of the guide rail part 9A with respect to the insertion / extraction direction of the battery 90. Therefore, it is possible to prevent the battery 90 from rattling with the battery 90 attached to the battery attachment portion 9.

DESCRIPTION OF SYMBOLS 1A ... Impact driver, 1B ... Electric tool, 2 ... Brushless motor, 20 ... Rotor, 20a ... Shaft, 21 ... Stator, 21a ... Position control part, 22 ... Drive coil, 22a ... Slot, 23 ... Gap, 24 ... Bearing part, 24a ... Bearing, 24b ... Supporting part, 25 ... Bearing, 26 ... Bearing 27 ... Board mounting portion, 27a ... Screw, 28 ... Air port, 3 ... Fan, 30 ... Recess, 4 ... Reduction gear, 42 ... Internal gear, 42a ..First position restricting portion, 42b ... second position restricting portion, 42c ... shaft support portion, 5 ... hammer unit, 50 ... spindle, 52 ... hammer unit case, 6 ... Anvil, 7 ... Switch, 8 ... Direct Replacement switch, 80L ... first switch, 80R ... second switch, 81La ... first operation part, 81Lb ... first pressing part, 81Ra ... second operation Part, 81Rb ... second pressing part, 81c ... elastic displacement part, 9 ... battery mounting part, 9A ... guide rail part, 9F ... front rail part, 9Fd ... support surface , 9Fu ... guide surface, 9R ... rear rail, 9Rd ₁ ... first support surface, 9Rd ₂ ... second support surface, 9Ru ... guide surface, 90 ... battery 91 ... Guide convex part, 91a ... Recognizing part, 92 ... Guide concave part, 10 ... Housing, 10a ... First vent, 10b ... Second vent, 10H ... Handle, 10S ... Strap, 10Sa ... Shaft, 10G ... Hook DESCRIPTION OF SYMBOLS 10Gn ... Nut, 11R ... Rear housing, 11F ... Front housing, 11Ra ... Shaft fixing part, 11Rb ... Hole part, 11Rc ... Opening, 11Rd ... Functional component attachment part , 12B: shaft support portion, 12R: motor case portion, 12F ... hammer case portion, 13R ... handle portion, 13F ... handle portion, 14R ... split surface, 14F ... Dividing surface, 15 ... screw, 16R ... hole, 16F ... hole, 17 ... functional part support member, 17a ... erroneous insertion prevention convex part, 17b ... first Functional part support part, 17c ... 2nd functional part support part, 120 ... Stator support part, 120a ... 1st control part, 120b ... 2nd control part, 121 ... Internal gear support part, 121a... First restriction part, 12 ... Hammer mounting part, 110 ... Control part, 110R ... Rear housing, 110F ... Front housing, 130R ... Shaft support part, 130F ... Shaft support part, 150 ... Screw, 160R ... hole, 160F ... hole, 200 ... motor, 200a ... shaft, 201 ... bevel gear, 400 ... reduction gear, 400a ... shaft, 600 ... Chuck, 601 ... Output shaft, 602R ... Bearing, 602F ... Bearing

Claims (11)

A motor for driving the driven part;
A housing for housing the motor;
A handle provided in the housing;
A trigger is provided on the top of the handle, and a switch for operating the motor by operating the trigger;
An operation changeover switch having an operation unit for receiving at least an operation for switching between normal rotation and reverse rotation of the motor;
Forward rotation and reverse rotation of the motor are set based on whether or not the operation changeover switch is operated, and a control unit that maintains normal rotation or reverse rotation of the motor during operation of the operation changeover switch is provided. Electric tool to do. The power tool according to claim 1, wherein the operation unit is disposed within a range in which a thumb or index finger of the hand reaches when the handle is gripped by a hand so that the trigger can be operated. The operation unit is
A first operating portion that is provided on one side of the handle and is operated and displaced by a hand holding the handle;
And a second operating portion that is provided on the other side surface of the handle and is displaced by being operated by a hand holding the handle, and is displaceable independently of the first operating portion. The electric tool according to claim 1 or 2. The controller switches between normal rotation and reverse rotation of the motor when the operation changeover switch is operated during operation of the switch, and maintains normal rotation or reverse rotation of the motor during operation of the operation changeover switch. The power tool according to any one of claims 1 to 3, wherein the power tool is provided. When the switch is operated during operation of the operation selector switch, the controller rotates the motor in the normal direction or the reverse direction in a rotation direction set based on whether or not the operation selector switch is operated. The electric tool according to any one of claims 1 to 4, wherein the motor maintains normal rotation or reverse rotation during the operation. The control unit invalidates the operation of the operation changeover switch and continues the operation by the operation of the switch when the operation changeover switch is operated during the operation of the switch. Item 4. The electric tool according to any one of Items 3. The power tool according to claim 6, wherein when the operation of the switch is released, the control unit sets a rotation direction of the motor by operating the operation changeover switch. The power tool according to any one of claims 1 to 7, wherein the control unit invalidates the operation of the switch by another operation of the operation changeover switch. The power tool according to claim 3, wherein the control unit switches operation settings by a combination of operations of the first operation unit and the second operation unit. The power tool according to claim 9, wherein the control unit switches an operation setting by a combination of the switch and operations of the first operation unit and the second operation unit. The controller is configured to set a rotation direction of the motor by a first forward / reverse rotation switching operation mode for maintaining normal rotation or reverse rotation of the motor during operation of the operation switching switch, and operation of the operation switching switch, When the switch is operated, a second forward / reverse rotation switching operation mode for rotating the motor in a set rotation direction is provided, and the first forward / reverse rotation switching operation mode or the second forward / reverse rotation switching operation mode is provided. The electric tool according to any one of claims 1 to 10, wherein the power tool can be selected.

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