JP5368946B2 - Electric tool - Google Patents

Description

  The present invention is a cylindrical housing main body in which a motor and a gear unit for rotating a tip tool are accommodated, and a portion gripped by a user, and one end portion of the housing main body is relatively rotated with respect to a base end portion. A cylindrical grip portion connected in a possible state, wherein the housing main body portion is inclined with respect to the grip portion, and the housing main body portion is disposed substantially coaxially with the grip portion. The present invention relates to a power tool that can be held.

A technique related to the above-described electric power tool is described in Patent Document 1.
In this electric tool, a base end portion of a cylindrical housing main body in which a motor and a gear portion for rotating a tip tool are accommodated and a tip end portion of a cylindrical grip portion gripped by a user can be relatively rotated. It is connected in the state. Further, on the side surface of the base end portion of the housing main body portion, an operation portion of a drive switch for driving the tip tool of the electric tool in the normal rotation direction or the reverse rotation direction is provided. Further, a lock switch for holding the drive switch in an OFF state is provided on the upper surface of the base end portion of the housing main body.
For this reason, an electric tool can be used by operating the operation part of a drive switch in the state (inclined state) which bent the housing main-body part in the connection position with respect to the grip part. After use, the housing body is rotated to a position substantially coaxial with the grip, and the lock switch is operated in the locking direction, and the electric tool is stored in a tool box or the like.

JP 2008-55563 A

  However, in the electric tool described above, when storing the electric tool, it is necessary to operate the lock switch in the locking direction in a state where the housing main body is rotated to a position substantially coaxial with the grip portion. For this reason, for example, when the lock operation of the lock switch is forgotten, there is a possibility that the operation part of the drive switch of the electric tool is pushed by another tool in the tool box and the electric tool is activated.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is to eliminate the need for a lock operation when storing the electric tool and prevent troubles caused by forgetting the lock. That is.

The above-described problems are solved by the inventions of the claims.
The invention according to claim 1 is a cylindrical housing main body portion in which a motor and a gear portion for rotating a tip tool are accommodated, and a portion gripped by a user, and one end portion is provided at a base end portion of the housing main body portion. A cylindrical grip portion connected in a relatively rotatable state, wherein the housing body portion is inclined with respect to the grip portion, and the housing body portion is disposed substantially coaxially with the grip portion. An electric power tool that can be held in a state, comprising: a rotation prohibiting mechanism that prohibits rotation of the motor when the housing body rotates relative to a position substantially coaxial with the grip. To do.

  According to the present invention, when the housing main body is rotated to a position substantially coaxial with the grip portion, the rotation prohibiting mechanism operates to prohibit the rotation of the motor. For this reason, the power tool can be stored in a state in which the housing main body is rotated to a position substantially coaxial with the grip. Therefore, when storing the power tool, it is only necessary to rotate the housing main body portion to a position substantially coaxial with the grip portion, and no special locking operation is required. Therefore, unlike the prior art, there is no trouble that the drive switch of the electric tool is pushed by another tool in the tool box due to forgetting the lock, and the electric tool rotates unexpectedly.

According to a second aspect of the present invention, the rotation prohibiting mechanism prohibits the rotation of the motor by locking the operation of a drive switch for driving the motor.
That is, since the drive switch is mechanically locked to prohibit the rotation of the motor, the rotation prohibiting mechanism has high reliability.
According to invention of Claim 3, a drive switch has a switch main-body part and a trigger part rotated in the state of being coaxial with respect to the switch main-body part, and the said trigger part is an original position with respect to the said switch main-body part. The trigger is configured to drive the motor by rotating from the trigger portion, and when the trigger portion is in the original position and the housing main body portion is relatively rotated to a position substantially coaxial with the grip portion. Further, a groove portion into which the protrusion of the rotation prohibiting mechanism is fitted is provided.

According to a fourth aspect of the present invention, the rotation prohibiting mechanism detects that the housing main body has relatively rotated to a position substantially coaxial with the grip portion, and electrically inhibits rotation of the motor. .
According to the invention of claim 5, the rotation prohibiting mechanism prohibits the rotation of the motor upon receiving a signal of the switch that operates when the housing main body portion is relatively rotated to a position substantially coaxial with the grip portion. And a control unit.
That is, since the rotation of the motor is electrically prohibited using the switch, the degree of freedom of the mounting position of the switch constituting the rotation prohibiting mechanism is improved.

  According to the invention of claim 6, the switch is attached to one of the housing body and the grip, and the other of the housing body and the grip is connected to the movable part of the switch. A striker capable of abutting is formed, and when the housing main body portion is inclined with respect to the grip portion, the movable portion of the switch is pressed against the striker, and the housing main body portion is substantially coaxial with the grip portion. In the process of relative rotation to a position, the striker is separated from the movable part of the switch.

According to a seventh aspect of the invention, there is provided a release mechanism for releasing the rotation prohibition state when the rotation prohibition mechanism prohibits the rotation of the motor.
For this reason, by releasing the rotation prohibition state of the rotation prohibition mechanism by the release mechanism, the electric power tool can be used in a state where the housing main body portion is disposed substantially coaxially with the grip portion.

  According to the present invention, the lock operation required when storing the power tool is unnecessary, and troubles caused by forgetting to lock are prevented.

It is a partially broken side view showing the state at the time of use of the electric tool concerning Embodiment 1 of the present invention. It is the II section enlarged view (A) of FIG. 1, and BB arrow sectional drawing (B figure) of A figure. It is an enlarged side view (A figure) showing the state of the rotation prohibition mechanism at the time of use of an electric tool, and the BB arrow line view (B figure) of A figure. It is a partially broken side view showing the state at the time of storage of the electric tool concerning Embodiment 1 of the present invention. It is an enlarged side view (A figure) showing the state of the rotation prohibition mechanism at the time of storage of an electric tool, and the BB arrow line view (B figure) of A figure. It is a side view (A figure) showing the state of the rotation prohibition mechanism at the time of use of the electric tool which concerns on Embodiment 2 of this invention, and a side view (B figure) showing the state of the rotation prohibition mechanism at the time of storage of the said electric tool. . It is a side view (A figure) showing the state of the rotation prohibition mechanism at the time of use of the electric tool which concerns on the example of a change of Embodiment 2, and the side view (B figure) showing the state of the rotation prohibition mechanism at the time of the storage of the said electric tool. . FIG. 10 is a schematic diagram illustrating a modification example of the rotation prohibiting mechanism of the electric tool according to the second embodiment. It is a schematic diagram showing the electric circuit of the electric tool which concerns on Embodiment 2 of this invention.

[Embodiment 1]
Hereinafter, based on FIGS. 1-5, the electric tool (rechargeable pen impact driver) which concerns on Embodiment 1 of this invention is demonstrated. Here, the front, rear, left and right and top and bottom described in the figure correspond to the front, back, left and right and top and bottom of a rechargeable pen impact driver (hereinafter referred to as a power tool).

<About the outline of electric tools>
As shown in FIG. 1, the housing 11 of the electric power tool 10 includes a cylindrical housing body 12 and a grip 15 connected to the base end of the housing body 12 so as to be vertically rotatable. Has been.
In the housing body 12, a gear portion (not shown), the motor 30, and the drive switch 40 are accommodated coaxially in order from the front side. The gear portion is a portion that decelerates the rotation of the motor 30 and converts the rotational force into a rotational impact force. The output of the gear portion is transmitted to the anvil 13 attached to the tip of the housing main body portion 12. The The anvil 13 is attached to the tip of the housing main body 12 in a rotatable state via a bearing, and a chuck for attaching a tip tool such as a driver bit or a socket bit (not shown) to the tip of the anvil 13. A portion 13t is provided.

  The drive switch 40 is a switch for switching between normal rotation and reverse rotation of the motor 30 and adjusting the rotation speed of the motor 30. The drive switch 40 includes a cylindrical switch main body portion 42 that houses a switch circuit, and a cylindrical trigger portion 44 that covers the switch main body portion 42 and is configured to rotate coaxially with the switch main body portion 42. It consists of and. A part of the outer peripheral surface of the trigger portion 44 protrudes from left and right openings (not shown) of the housing main body 12. Thereby, the protrusion part of the outer peripheral surface of the trigger part 44 can be operated from the outer side of the housing main-body part 12, and the trigger part 44 can be rotated with respect to the switch main-body part 42. FIG. When the trigger part 44 is rotated clockwise from the original position with respect to the switch body part 42, the motor 30 rotates forward and the rotation speed of the motor 30 increases as the rotation angle of the trigger part 44 increases. Further, when the trigger unit 44 is rotated counterclockwise from the original position, the motor 30 is reversely rotated and the rotation speed of the motor 30 is increased as the rotation angle of the trigger unit 44 is increased.

  The grip portion 15 is a portion that is gripped when the user uses the electric power tool 10, and is formed in a cylindrical shape, and a battery storage portion 15e is provided on the inside thereof. The battery housing portion 15e is a portion that houses the case main body portion 18m of the battery pack 18, and includes an opening (not shown) on the distal end side (lower end side in FIG. 1) of the grip portion 15. The battery pack 18 is a battery unit including a battery for the electric power tool 10 and a case for storing the battery, and includes a case main body portion 18m and a grip forming portion 18z. Then, the case main body portion 18m of the battery pack 18 is entirely inserted into the battery storage portion 15e of the grip portion 15, so that the battery pack 18 is coupled to the grip portion 15 and is electrically connected to the battery of the battery pack 18. The electrical circuit of the tool 10 is electrically connected. In this state, the grip forming portion 18 z of the battery pack 18 constitutes the tip portion of the grip portion 15.

<About the connection structure between the housing body 12 and the grip 15>
The base end portion 120 of the housing main body 12 is a portion connected to the end of the grip portion 15, and as shown in FIGS. 2A and 2B, left and right vertical wall portions 121 and 122 and upper and lower circles. The arc-shaped wall portions 123 and 124 form a substantially box shape that is thin in the width direction (left-right direction). A square opening 120 h is formed in the rear end wall portion of the base end portion 120. A cylindrical portion 125 used as a bearing extends in the left-right direction at a position near the center of the base end portion 120 so as to cross the base end portion 120. That is, as shown in FIG. 2A, the cylindrical portion 125 is disposed at a position close to the upper arcuate wall portion 123 and at a position away from the lower arcuate wall portion 124. The outer circumferential surface 123r of the upper arcuate wall portion 123 and the outer circumferential surface 124r of the lower arcuate wall portion 124 are formed in a convex arcuate surface shape so as to overlap an arc centered on the axis of the cylindrical portion 125. Has been.

As shown in FIG. 2B, a recess 150 into which the base end 120 of the housing main body 12 is fitted is formed at the end of the grip 15 connected to the base end 120 of the housing main body 12. ing. As shown in FIG. 2 (B), the recess 150 has a base end portion 120 of the housing main body 12 sandwiched from the left and right directions and is in surface contact with the left and right vertical wall portions 121 and 122 of the base end portion 120. Support wall portions 151 and 152 are provided. A connecting shaft portion 153 that is inserted into the cylindrical portion 125 of the base end portion 120 of the housing main body portion 12 extends horizontally (in the left-right direction) between the left and right support wall portions 151 and 152. Thereby, the base end part 120 of the housing main-body part 12 and the edge part of the grip part 15 are connected in the state which can be relatively rotated centering | focusing on the connection shaft part 153.
The connecting shaft portion 153 of the grip portion 15 is formed in a cylindrical shape, and a screw N for joining the left and right grip pieces 15a and 15b constituting the grip portion 15 is passed through the inside thereof.

As shown in FIG. 2A, an upper stopper 155 that functions as a stopper when the housing body 12 rotates to the left with respect to the grip 15 is provided on the rear upper part of the recess 150 of the grip 15. ing. That is, as shown in FIG. 4, the housing main body portion 12 is rotated to the left with respect to the grip portion 15, and the upper stopper of the grip portion 15 is disposed in a state where the housing main body portion 12 is arranged substantially coaxially with the grip portion 15. The step 12d of the housing main body 12 abuts on 155, and the left rotation of the housing main body 12 is prohibited.
The upper stopper 155 includes a pressing surface 155p inside the concave portion 150 of the grip portion 15, and the pressing surface 155p constitutes the base end portion 120 of the housing main body portion 12 as shown in FIG. The upper arcuate wall portion 123 is configured to come into surface contact with the outer peripheral surface 123r of the upper arc-shaped wall portion 123 from the upper side.

As shown in FIG. 2A, a lower stopper 157 that functions as a stopper when the housing body 12 rotates to the right with respect to the grip 15 is provided at the front lower portion of the recess 150 of the grip 15. ing. That is, as shown in FIG. 1 and FIG. 2A, the housing main body portion 12 is rotated to the right with respect to the grip portion 15, and the housing main body portion 12 is bent at the coupling position with respect to the grip portion 15. In a state of being inclined with respect to the grip portion 15, the bent portion 12 f of the housing main body portion 12 comes into contact with the lower stopper 157 of the grip portion 15, and the right rotation of the housing main body portion 12 is prohibited.
The lower stopper 157 includes a pressing surface 157 p inside the recess 150 of the grip portion 15, and the pressing surface 157 p is an outer periphery of the lower arcuate wall portion 124 that constitutes the base end portion 120 of the housing body 12. The surface 124r is configured to come into surface contact from below.
Therefore, when the housing main body 12 and the grip portion 15 are relatively rotated, the pressing surface 157p of the lower stopper 157 slides along the outer peripheral surface 124r of the lower arcuate wall portion 124, and the upper stopper The pressing surface 155 p of 155 slides along the outer peripheral surface 123 r of the upper arcuate wall portion 123.

<About the rotation inhibition mechanism 20>
As shown in FIG. 2A and the like, the rotation prohibiting mechanism 20 is accommodated in the base end portion 120 of the housing main body portion 12. The rotation prohibiting mechanism 20 is a mechanism that prohibits the rotation of the motor 30 in a state in which the housing body 12 is rotated to a position substantially coaxial with the grip 15.
As shown in FIG. 2A, the rotation prohibiting mechanism 20 includes an operating shaft 22, a pair of front and rear bearing portions 24 that support the operating shaft 22, and a spring portion 26 that presses the operating shaft 22 backward. I have. The operating shaft 24 is positioned between the lower arcuate wall portion 124 constituting the base end portion 120 of the housing main body portion 12 and the cylindrical portion 125 in parallel with the axis of the motor 30 and the drive switch 40. The bearing portion 24 is held so as to be slidable in the axial direction (front-rear direction). Then, with the operating shaft 24 sliding rearward, the rear end portion of the operating shaft 24 protrudes rearward from the opening 120 h of the base end portion 120 of the housing body 12.

A head portion 22 p is formed at the rear end position of the operating shaft 22. The head portion 22p is a portion that is pressed by the pressing surface 157p of the lower stopper 157 of the grip portion 15 when the housing body portion 12 rotates to a position substantially coaxial with the grip portion 15 (see FIG. 4). . As shown in FIG. 3A, the head 22p is formed with an inclined surface 22s that converts the pressing force by the pressing surface 157p of the lower stopper 157 into a pressing force in the forward direction (axial direction).
A projection 22k is formed at the tip position of the operating shaft 22. When the operating shaft 22 is pushed forward by the pressing surface 157p of the lower stopper 157, the protrusion 22k moves behind the trigger portion 44 of the drive switch 40 as shown in FIGS. This is a portion that fits into a square groove 44c formed at the end. Here, the protrusion 22k of the operating shaft 22 and the groove 44c of the trigger part 44 are positioned so that both 44c and 22k overlap in the front-rear direction with the trigger part 44 in the original position.
A flange-shaped spring receiving portion 22u is provided at a substantially central position in the longitudinal direction of the operating shaft 22, and the spring receiving portion 22u is disposed between the pair of front and rear bearing portions 24. And the spring part 26 is mounted | worn between the spring receiving part 22u of the operating shaft 22, and the front bearing part 24, and the operating shaft 22 is pressed back.

Therefore, in a state where the head portion 22p of the operating shaft 22 is not in contact with the pressing surface 157p of the lower stopper 157, the operating shaft 22 is a spring of the spring portion 26 as shown in FIGS. It is held in the retreat limit position by force. In a state where the operating shaft 22 is in the retreat limit position, the head portion 22p at the rear end position protrudes rearward from the opening 120h of the base end portion 120 of the housing main body portion 12, and the protrusion 22k at the front end position is the drive switch 40. The trigger portion 44 is disengaged from the groove portion 44c. For this reason, the trigger part 44 of the drive switch 40 can rotate with respect to the switch body part 42.
When the housing body 12 rotates to the left with respect to the grip portion 15 from this state, the lower stopper 157 of the grip portion 15 operates along the arcuate wall portion 124 on the lower side of the base end portion 120 of the housing body 12. Relatively moves in the direction of the head 22p of the shaft 22. Then, the pressing surface 157p of the lower stopper 157 of the grip portion 15 presses the head portion 22p of the operating shaft 22 forward while the housing main body portion 12 is rotated to a position substantially coaxial with the grip portion 15. As a result, the operating shaft 22 slides forward against the spring force of the spring portion 26, and the protrusion 22 k at the tip position of the operating shaft 22 fits into the groove portion 44 c of the trigger portion 44 of the drive switch 40. That is, when the operating shaft 22 is in the forward limit position, the projection 22k of the operating shaft 22 is fitted with the groove 44c of the trigger portion 44 of the drive switch 40, and the trigger portion 44 becomes non-rotatable and the drive switch 40 is turned off. Locked.

<About operation | movement of the electric tool 10 which concerns on this embodiment>
When the electric tool 10 is used, the housing main body 12 is rotated to the right with respect to the grip 15 from the state shown in FIG. 4, and the lower stopper 157 of the grip 15 is a bent portion of the housing main 12. It is held at a position where it abuts against 12f. That is, the housing body 12 is inclined with respect to the grip 15 at the coupling position to the state shown in FIG.
As a result, the lower stopper 157 of the grip portion 15 is separated from the operating shaft 22 of the rotation prohibiting mechanism 20, and the operating shaft 22 is retracted to the retreat limit position by the spring force of the spring portion 26. Then, the protrusion 22k of the operating shaft 22 comes out of the groove 44c of the trigger portion 44 of the drive switch 40. In this state, the power tool 10 can be used by rotating the trigger portion 44 of the drive switch 40 while gripping the grip portion 15.
In addition, after use, the housing body 12 is rotated to the left with respect to the grip 15 from the state shown in FIG. 1, and the step 12 d of the housing body 12 is held at a position where it abuts against the upper stopper 155 of the grip 15. To do. That is, the housing body 12 is rotated to the left to a position substantially coaxial with the grip 15 as shown in FIG.
Accordingly, the lower stopper 157 of the grip portion 15 presses the operating shaft 22 of the rotation prohibiting mechanism 20 forward, and the operating shaft 22 moves forward to the forward limit position against the spring force of the spring portion 26. Then, the protrusion 22k of the operating shaft 22 is fitted into the groove 44c of the trigger portion 44 of the drive switch 40. In this state, the drive switch 40 is locked, and the power tool 10 can be safely stored in the tool box.

<Advantages of the electric power tool 10 according to the present embodiment>
In the electric power tool 10 according to the present embodiment, when the housing body 12 is rotated to a position substantially coaxial with the grip 15, the rotation prohibiting mechanism 20 operates to prohibit the rotation of the motor 30. For this reason, when the electric tool 10 is stored, it is only necessary to rotate the housing body 12 to a position substantially coaxial with the grip 15, and no special locking operation is required. Therefore, unlike the prior art, there is no trouble that the drive switch of the electric tool is pushed by another tool in the tool box due to forgetting the lock, and the electric tool rotates unexpectedly.
Further, since the rotation prohibiting mechanism 20 prohibits the rotation of the motor 30 by locking the operation of the drive switch 40 for driving the motor 30, the rotation prohibiting mechanism 20 has high reliability.

[Embodiment 2]
Hereinafter, based on FIGS. 6-9, the electric tool which concerns on Embodiment 2 of this invention is demonstrated. The power tool according to the present embodiment is an electrical modification of the configuration of the rotation prohibiting mechanism 20 described in the first embodiment, and the other configurations are the same as those of the power tool 10 of the first embodiment. For this reason, in the electric power tool which concerns on this embodiment, the same code | symbol is attached | subjected about the member same as the electric power tool 10 of Embodiment 1, and description is abbreviate | omitted.

As shown in FIG. 6, the rotation prohibiting mechanism 50 of the electric tool 10 according to the present embodiment includes a rotation switch 52 housed in the base end portion 120 of the housing main body 12 and a striker 54 provided in the grip portion 15. And. The rotation switch 52 includes a switch main body 52m formed in a cylindrical shape and a movable portion 52s protruding in the axial direction from the switch main body 52m. The rotation switch 52 is attached to the base end portion 120 of the housing main body portion 12 so that the movable portion 52s can protrude rearward from the opening 120h of the base end portion 120.
As shown in FIG. 6A, the striker 54 is a member that presses the movable portion 52s of the rotation switch 52 in a state where the housing main body portion 12 is inclined to the use position with respect to the grip portion 15, and has a pin shape. Is formed. That is, the striker 54 is arranged in parallel to the connecting shaft portion 153 at the position of the recess 150 of the grip portion 15, and is configured so that the outer peripheral surface of the striker 54 can press the movable portion 52 s of the rotation switch 52. Yes. For this reason, when the electric tool 10 is used, the rotation switch 52 is turned on.
Further, in the process in which the housing main body 12 is rotated to a position substantially coaxial with the grip portion 15, the striker 54 is separated from the movable portion 52 s of the rotation switch 52 as shown in FIG. Therefore, when storing the power tool 10, the rotation switch 52 operates in the off direction (off operation).

As shown in FIG. 9, the operation signal of the rotation switch 52 is input to the control unit 56 that controls the drive element FET that drives the motor 30. The control unit 56 is configured to control the drive element FET of the motor 30 based on a signal from the drive switch 40 when an ON operation signal of the rotation switch 52 is input. For this reason, when the electric tool 10 is used, the rotation switch 52 is turned on, and the electric tool 10 is operated based on a signal from the drive switch 40.
On the other hand, when the power tool 10 is stored, the rotation switch 52 is turned off. Therefore, even if the trigger portion 44 of the drive switch 40 is slightly rotated, the power tool 10 is held in a stopped state.
As described above, since the rotation switch 52 is used to electrically prohibit the rotation of the motor 30, the degree of freedom of the mounting position of the rotation switch 52 constituting the rotation prohibiting mechanism 50 is improved.

Here, in the present embodiment, an example in which the rotation switch 52 is provided in the base end portion 120 of the housing main body portion 12 and the striker 54 is provided in the grip portion 15 has been shown, but as shown in FIGS. In addition, it is possible to provide the grip switch 15 with the rotation switch 52 and use the arcuate wall portion 124 on the lower side of the housing body 12 as a striker of the rotation switch 52.
Further, as shown in FIGS. 8A and 8B, a part of the outer peripheral surface of the connecting shaft portion 153 serving as the rotation center of the housing main body portion 12 with respect to the grip portion 15 is cut to form a flat portion 153f. The connecting shaft portion 153 can also be used as a striker for the rotation switch 52.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the first and second embodiments, the example in which the rotation of the motor 30 is prohibited by the rotation prohibiting mechanisms 20 and 50 when the housing main body 12 is relatively rotated to a position substantially coaxial with the grip 15 has been described. However, it is also possible to provide a release mechanism for releasing the rotation prohibiting operation of the rotation prohibiting mechanisms 20 and 50 when the housing main body 12 is relatively rotated to a position substantially coaxial with the grip 15. As a result, by releasing the rotation prohibition state of the rotation prohibition mechanisms 20 and 50 by the release mechanism, the electric tool 10 can be used in a state in which the housing body 12 is disposed substantially coaxially with the grip portion 15. Become.
In the electric tool 10 described in the second embodiment, the movable portion 52s of the rotation switch 52 is pressed by the strikers 54 and 124 in a state where the housing main body portion 12 is bent at the coupling position with respect to the grip portion 15. An example was given. However, it is also possible to configure the movable portion 52s of the rotation switch 52 to be pressed by the strikers 54 and 124 when the housing main body 12 rotates to a position substantially coaxial with the grip portion 15. In this case, the control unit 56 keeps the motor 30 in a stopped state when an ON operation signal of the rotation switch 52 is input.

12 .... Housing body 120 ... Base end 15 ... Grip 20 ... Rotation prohibiting mechanism 22 ... Operating shaft 22k ... Protrusion 30 ... Motor 40 ... ... Drive switch 42 ... Switch body 44 ... Trigger part 44c ... Groove 50 ... Rotation prohibiting mechanism 52 ... Rotation switch 54 ... Strike 56 ... ..Control part

Claims (7)

A cylindrical housing main body that houses a motor and gear for rotating the tip tool, and a part that is gripped by the user, with one end being relatively rotatable with the base end of the housing main body A power tool that can be held in a state in which the housing main body portion is inclined with respect to the grip portion and a state in which the housing main body portion is disposed substantially coaxially with the grip portion. Because
An electric tool comprising a rotation prohibiting mechanism for prohibiting rotation of the motor when the housing main body is relatively rotated to a position substantially coaxial with the grip. The electric tool according to claim 1,
The rotation prohibiting mechanism prohibits rotation of the motor by locking an operation of a drive switch for driving the motor. The electric tool according to claim 2,
The drive switch includes a switch main body and a trigger unit that rotates coaxially with the switch main body, and the motor rotates when the trigger unit rotates from the original position with respect to the switch main body. Is configured to drive,
The trigger portion has a groove portion into which the protrusion of the rotation prohibiting mechanism is fitted when the trigger portion is in an original position and the housing main body portion is relatively rotated to a position substantially coaxial with the grip portion. An electric tool characterized by being provided. The electric tool according to claim 1,
The rotation prohibiting mechanism detects the fact that the housing main body portion is relatively rotated to a position substantially coaxial with the grip portion, and electrically prohibits rotation of the motor. The electric tool according to claim 4,
The rotation prohibiting mechanism includes a switch that operates when the housing main body portion is relatively rotated to a position substantially coaxial with the grip portion, and a control unit that receives a signal from the switch and prohibits rotation of the motor. An electric tool characterized by that. The electric tool according to claim 5, wherein
The switch is attached to one of the housing body and the grip part,
A striker capable of contacting the movable portion of the switch is formed on the other of the housing body and the grip,
When the housing main body portion is inclined with respect to the grip portion, the movable portion of the switch is pressed by the striker, and the striker is rotated in the process of the relative rotation of the housing main body portion to a position substantially coaxial with the grip portion. Is separated from the movable part of the switch. The electric tool according to any one of claims 1 to 6,
An electric tool comprising: a release mechanism for releasing the rotation prohibition state when the rotation prohibition mechanism prohibits rotation of the motor.

Images