JP4993176B2 - Battery pack and electric tool using the battery pack - Google Patents

Description

  The present invention relates to a battery pack and a power tool using the battery pack.

2. Description of the Related Art Conventionally, there is an electric tool powered by electricity, and there is an electric tool that moves with a battery pack as power in order to improve carrying convenience. This battery pack incorporates a nickel metal hydride battery, a lithium ion battery, or the like inside, and as shown in Patent Document 1, includes a latch mechanism and is configured to be easily attached to and detached from the power tool.
JP 2002-260618 A

  In the electric tool provided with the battery pack in a detachable manner, when the electric tool is placed on a flat surface such as a floor, the operation unit included in the latch mechanism for attaching / detaching the battery pack has a configuration in which the flat portion comes into contact with the flat surface. There is a case. When the electric tool having such a configuration is placed on a flat surface, the operation unit is pushed, the latch mechanism is released, and the battery pack may be detached from the electric tool. Even when the latch mechanism cannot be removed, the operation unit is always pushed, which may adversely affect the spring and the like constituting the latch mechanism and shorten the product life. Even in a battery pack provided with a latch mechanism, when the surface provided with the operation portion is a surface that comes into contact with the flat surface, the operation portion is always pressed, and the springs constituting the latch mechanism are adversely affected. Product life could be shortened.

  Therefore, an object of the present invention is to provide a battery pack that suppresses a decrease in the function of the latch mechanism, and to provide an electric tool that prevents the battery pack from dropping off.

  In order to solve the above-described problems, the present invention provides a housing having a substantially square side surface, a connecting portion provided on the housing and connected to an electrical device, and a first position disposed on the side surface and protruding from the side surface. And an operation part movable between the first position and a second position having a smaller projection amount than the first position, and connected to the operation part so as to be interlocked with the operation part. It is disposed at a first engagement position that can be engaged with the electric device at a certain time, and is disposed at a second engagement position that cannot be engaged with the electric device when the operation portion is at the second position. A battery pack comprising: a joint portion; and a biasing portion that biases the operation portion in a direction protruding from the side surface, wherein the side surface is provided with a protrusion protruding from the side surface. The protruding amount of the portion is such that the battery pack is placed on a flat surface with the side surface as the lower side and the peripheral edge of the side surface and the When the raising part comes into contact with the plane, the operating part is not in contact with the plane or is in contact with the first position or between the first position and the second position. Provide a battery pack that is set to.

  In the battery pack having the above configuration, the protruding amount of the protruding portion is such that when the battery pack is placed on a flat surface with the side face down, both the peripheral edge and the protruding portion are in contact with the flat surface. The operation unit may be set to be in the first position while being in non-contact with or in contact with the plane.

  According to such a configuration, in a state where the battery pack is placed on a flat surface with the side face down, the operation unit moves only from the first position to the front of the second position even if pressed, and the second position Never move up. Therefore, the burden on the urging unit can be reduced, and the deterioration of the function of the latch mechanism including the operation unit, the urging unit, and the engaging unit can be suppressed. In addition, since the operating portion does not move to the second position, it does not move to the second engaging position even if it is placed on the engaging portion.

  In particular, when the operating portion is only at the first position, the urging portion is not pressed, so that it is possible to further suppress the deterioration of the function of the latch mechanism.

  The housing is connected to the side surface and provided with the connecting portion, the side surface and the rear surface connected to the upper surface, and connected to the side surface and the rear surface and positioned opposite to the rear surface. And the operating portion is disposed in the vicinity of the front surface of the side surface, the peripheral edge has a rear side edge defined from a connection point between the side surface and the rear surface, and the projecting portion is It is preferably provided on a side surface between the rear side edge and the operation portion, and the protruding portion and the rear side edge are in contact with each other and placed on the plane. In this configuration, on the side surface, it is preferable that the center of gravity is located between the protruding portion and the rear side edge.

  According to such a configuration, the battery pack can be stably placed on a flat surface, and the portion provided with the side operation unit and the flat surface can be separated. Therefore, it can suppress that an operation part contact | abuts on a plane. In addition, when the center of gravity is between the protruding portion and the rear side edge, the battery pack is placed on a flat surface in a more stable state. Therefore, the battery pack placed on the flat surface moves and the operation portion touches the flat surface. Further contact is further suppressed.

  The housing has an upper surface connected to the side surface and provided with the connecting portion, and a lower surface connected to the side surface and positioned opposite to the upper surface. It is arranged in the vicinity of the upper surface, and the peripheral edge has a lower side edge defined by a connecting portion between the side surface and the lower surface, and the projecting portion is provided on the side surface between the lower side edge and the operation portion. The protruding portion and the lower side edge may be in contact with each other and placed on the plane. In this configuration, it is preferable that the side surface has a center of gravity position between the protruding portion and the lower side edge.

  Even in such a configuration, the battery pack can be stably placed on a plane, and the portion provided with the side operation portion and the plane can be separated. Therefore, it can suppress that an operation part contact | abuts on a plane. In addition, when the center of gravity is between the protruding portion and the lower side edge, the battery pack is placed on a flat surface in a more stable state. Therefore, the battery pack placed on the flat surface moves and the operation portion touches the flat surface. Further contact is further suppressed.

  In order to solve the above-mentioned problem, an electric tool including a main body having an output section, a grip provided extending from the main body, and a battery pack detachably provided on the grip. The battery pack includes a housing having a side surface, a connection portion provided on the housing and connected to the gripping portion, a first position disposed on the side surface and projecting from the side surface, An operation unit movable between a second position having a projection amount smaller than one position, and connected to the operation unit so as to be interlocked with the operation unit, the operation unit being in the first position An engagement portion disposed at a first engagement position engageable with the gripping portion and disposed at a second engagement position incapable of engaging with the gripping portion when the operation portion is at the second position; An urging portion that urges the operation portion in a direction protruding from the side surface. A protruding portion is provided, and the protruding amount of the protruding portion is such that when the electric tool is placed on a flat surface with the side face down, the flat surface and the floor surface are brought into contact with the main body portion. Provided is an electric tool in which an operation unit is set to be in non-contact with or in contact with the flat surface and located between the first position or the first position and the second position.

  In this electric power tool, the protruding amount of the protrusion is such that when the electric power tool is placed on a plane with the side face down, both the main body and the protrusion are in contact with the flat surface. The operation unit may be set so as to be in non-contact with the plane or in contact with the first position.

  According to such a configuration, in a state where the power tool is placed on a plane with the side face down, the operation unit moves only from the first position to the front of the second position even if pressed, and the second position Never move up. Therefore, since the operation part does not move to the second position, the engagement part does not move to the second engagement position, and the engagement is not disabled. Moreover, the burden concerning an urging | biasing part can be made small and the fall of the function of the latch mechanism comprised including an operation part, an urging | biasing part, and an engaging part can be suppressed.

  In particular, when the operating portion is only in the first position, the urging portion is not pressed, so the engaging portion does not move to the second engaging position, and the function of the latch mechanism is reduced. Further suppression can be achieved.

In order to solve the above-described problem, a main body portion having an output portion, a grip portion extending from the main body portion, and a battery pack detachably provided on the grip portion and having a side surface are provided. the electric power tool, the grip section includes a connected part connecting the the battery pack to a vicinity該被connection part is disposed on the side surface side, the gripping state where the battery pack is connected an operating portion movable between a first position and a second position protruding amount smaller than the first position protruding from parts, are operatively coupled to the operation section provided in the connected part, the A second engaging position that is engageable with the battery pack when the operating portion is in the first position, and a second engaging position that cannot be engaged with the battery pack when the operating portion is in the second position. An engaging portion disposed at the engaging position; and an urging portion that urges the operation portion in a direction protruding from the side surface. The battery pack includes a housing having a side surface, a connecting portion provided in the housing and connected to the connected portion, and an engaged portion provided in the connecting portion and engaged with the engaging portion. , And a protrusion protruding from the side surface is provided on the side surface, and the protrusion amount of the protrusion is the same as that of the main body portion when the power tool is placed on a plane with the side surface positioned downward. When the flat surface and the floor surface come into contact with each other, the operation unit is set to be in non-contact with the flat surface or in contact with the first position or between the first position and the second position. Provide a power tool.

  In this electric power tool, the protruding amount of the protrusion is such that when the electric power tool is placed on a plane with the side face down, both the main body and the protrusion are in contact with the flat surface. The operation unit may be set so as to be in non-contact with the plane or in contact with the first position.

  According to the battery pack and the electric tool of the present invention, it is possible to prevent the battery pack from being detached from the outer frame of the electric tool, and to suppress the deterioration of the function of the latch mechanism.

  Hereinafter, a battery pack and a power tool including the battery pack according to an embodiment of the present invention will be described with reference to FIGS. A drill 1 that is an electric tool shown in FIG. 1 mainly includes a main body 2, a handle 3, and a battery pack 10.

  The main body 2 incorporates a motor (not shown) inside, and is provided with a tool holding portion 2A which is an output portion and can be fitted with a drill bit 20 at a tip portion.

  The handle 3 extends from the front end portion of the main body 2, and a trigger 3 </ b> A is provided at the base end portion of the extended portion. The trigger 3A controls electricity supplied from the battery pack 10 to a motor (not shown). Further, a connecting portion (not shown) to which the battery pack 10 is connected is provided at the distal end portion of the handle 3 in the extending direction. The connecting portion (not shown) includes a plurality of terminals (not shown) and a below-described connecting portion. A rib (not shown) having an engaged portion (not shown) with which the notch mechanism 13 is engaged is provided.

  The battery pack 10 is provided at the front end of the handle 3 in the extending direction. As shown in FIG. 2, the battery pack 10 mainly includes a housing 11, a connection portion 12, and a notch mechanism 13.

  The housing 11 has a substantially rectangular parallelepiped shape, and is provided with a connection portion 12 and includes an upper housing 14 in which a control board (not shown) is disposed and a lower housing 15 in which a battery (not shown) is built. ing. A battery (not shown) built in the lower housing 15 is a nickel metal hydride battery or a lithium ion battery, and can be charged and discharged a plurality of times.

  In the housing 11, a surface on which the connection portion 12 is provided and which constitutes one surface of a substantially rectangular parallelepiped is defined as an upper surface 11A, and a surface opposite to the upper surface 11A is defined as a lower surface 11D. Side surfaces connected to the upper surface 11A and the lower surface 11D and provided with the notch mechanism 13 are defined as side surfaces 11B and 11B (FIG. 3). Although the side surface 11B is located on both sides of the upper surface 11A, it has a symmetrical shape, so only one side surface 11B will be described as a representative. Further, a surface connected to the upper surface 11A and the side surface 11B and positioned in a direction in which a gap of a terminal insertion portion 12A described later opens is defined as a rear surface 11C, and a surface opposite to the rear surface is defined as a front surface 11E. The peripheral edge of the side surface 11B, which is the portion connected to the rear surface 11C, is defined as the rear side edge 11a, and the peripheral edge of the portion connected to the lower surface 11D opposite to the upper surface 11A is defined as the lower side edge 11b. . Therefore, in the battery pack 10, the direction from the upper surface 11A to the lower surface 11D is the vertical direction, the direction from the one side surface 11B to the other side surface 11B is the side surface direction, the direction from the rear surface 11C perpendicular to the vertical direction and the side surface direction to the front surface 11E. Is defined as the front-rear direction.

  On the side surface 11B, a protrusion 14A that protrudes from the side surface 11B is provided at a position on the upper housing 14 side in the vicinity of the upper surface 11A. The protruding portion 14A is also provided in the same shape on the side surface 11B located on the opposite side of the one side surface 11B (FIG. 3). The battery pack 10 is configured such that the center of gravity is located between the protrusion 14A and the rear side edge 11a in the front-rear direction on the side surface 11B.

  As shown in FIG. 2, the connection portion 12 mainly includes a terminal insertion portion 12A and a pair of ribs 12B and 12B. The terminal insertion portion 12A includes a plurality of slots 12a that open toward the rear surface 11C, and terminals 12C (FIG. 3) are disposed in the slots 12a. The ribs 12B and 12B are provided on both side surfaces 11B and 11B of the upper surface 11A, respectively, and extend substantially parallel to the front-rear direction from the front surface 11E side to the rear surface 11C side. The ribs 12B and 12B and the upper housing 14 constituting the upper surface 11A define guide grooves 12b and 12b extending in parallel with the rib 12B.

  As shown in FIG. 3, the notch mechanisms 13 and 13 are provided in a pair with symmetrical shapes on both sides of the upper housing 14. The notch mechanisms 13 and 13 are respectively composed of an operating portion 13A, an engaging portion 13B and an urging portion 13C. It is configured. Since the pair of notch mechanisms 13 and 13 have a symmetrical shape, only one notch mechanism 13 will be described as a representative. The operation portion 13A protrudes from the side surface 11B and has a shaft (not shown) extending in the vertical direction at a position between the front surface 11E side periphery of the side surface 11B and the protrusion portion 14A and near the upper surface 11A side periphery. It is provided so as to be rotatable about the center. The amount of protrusion of the operation portion 13A from the side surface 11B is configured to be substantially equal to the amount of protrusion of the protrusion portion 14A from the side surface 11B in the most protruded state. The state in which the operation portion 13A protrudes most from the side surface 11B is defined as the first position where the battery pack 10 cannot be detached from the handle 3, and the state in which the protrusion amount is the smallest (as shown in FIG. 4 is substantially the same as the side surface 11B). The state in which the battery pack 10 is detachable from the handle 3 is defined as a second position where the battery pack 10 can be attached and detached.

  The engaging portion 13B is formed integrally with the operation portion 13A, and is disposed in the connecting portion 12 so as to protrude into the guide groove 12b. The engaging portion 13B moves in conjunction with the operating portion 13A. When the operating portion 13A is in the first position as shown in FIG. 3, the engaging portion 13B protrudes into the guide groove 12b and can be engaged with the handle 3. As shown in FIG. 4, when the operating portion 13A is in the second position, it does not protrude into the guide groove 12b but is accommodated in the upper housing 14 and in the second engagement position where it cannot be engaged with the handle 3. It is configured as follows.

  The urging portion 13C is composed of a coil spring, and abuts on the operation portion 13A to urge the operation portion 13A in a direction protruding from the side surface 11B. Therefore, as shown in FIG. 3, when no external force is particularly applied to the notch mechanism 13, the operation portion 13A is in the first position protruding from the side surface 11B by the urging force of the urging portion 13C, and the operation portion 13A The interlocking engaging portion 13B is in the first engaging position protruding into the guide groove 12b.

  When the battery pack 10 is placed on a flat floor surface, the lower surface 11D is usually a grounding surface. However, since the battery pack 10 has a substantially rectangular parallelepiped shape, the battery pack 10 may roll and be placed as a surface on which the side surface 11B is grounded. Since the center of gravity of the battery pack 10 is between the protrusion 14A and the rear side edge 11a, when the battery pack 10 is placed as a surface for grounding the side surface 11B, as shown in FIG. The edge 11a and the protrusion 14A serve as a grounding location. In this case, the operation portion 13A has a projection amount substantially equal to the projection portion 14A and is farther from the rear side edge 11a than the projection portion 14A, and therefore is always in the first position without contacting the floor. . Therefore, a load is not applied to the urging portion 13C, and the function of the notch mechanism 13 as a whole is suppressed from decreasing.

  Further, when the battery pack 10 rolls and is placed so that the side surface 11B is in contact with the floor surface, the lower side edge 11b and the protruding portion 14A may be installed as shown in FIG. In this case, the operation unit 13A is also grounded and urged to the floor, and is moved from the first position. However, since the protruding portion 14A is grounded, the amount of movement of the operating portion 13A becomes small, and therefore the load applied to the urging portion 13C becomes small, so that the function of the notch mechanism 13 as a whole is suppressed from lowering.

  When the battery pack 10 is attached to the handle 3, a rib (not shown) provided in a connected portion of the handle 3 is inserted into the guide groove 12b to move the battery pack 10 to the rear side, A plurality of terminals are inserted into the slots 12a of the terminal insertion portion 12A. Then, an engaged portion (not shown) provided on a rib (not shown) is engaged with the engaging portion 13B. A state in which the battery pack 10 is connected to the handle 3 because the battery pack 10 cannot move forward with respect to the handle 3 by engaging the engaged portion (not shown) and the engaging portion 13B. Is preserved.

  In the drill 1 having the above-described configuration, the operation unit 13A is not pushed unintentionally because the operation is always performed while holding the handle 3. However, when the drill 1 is placed on the floor surface during work interruption or after work completion, the side surface 11B is often placed in contact with the floor surface. When there is no protrusion 14A, the operation portion 13A provided on the side surface 11B contacts the floor surface and moves to the second position, and the engagement between the engagement portion 13B and the engaged portion (not shown). There is a risk that the agreement will be resolved. In this case, the terminal 12 </ b> C may be disconnected from a terminal (not shown) on the handle 3 side or the battery pack 10 may be disconnected from the handle 3 in the connection portion 12.

  However, as shown in FIG. 7 of the present embodiment, when the drill 1 is placed on the floor surface, the main body 2 (FIG. 1) of the drill 1 and the protrusion 14A of the side surface 11B are grounded and operated. The portion 13A is not grounded on the floor surface or is hardly energized even if it is grounded. In this state, the operating portion 13A does not move to the second position, and therefore the engaging portion 13B also moves from the guide groove 12b to the second engaging position where it does not engage with the engaged portion in a non-projecting state. There is nothing. Accordingly, the engagement between the engaging portion 13B and the engaged portion (not shown) is not released, and the battery pack 10 is prevented from being detached from the handle 3. Further, since the operation portion 13A is not excessively urged, the load applied to the urging portion 13C is also small, and the function of the notch mechanism 13 as a whole is suppressed from decreasing.

  The battery pack and the power tool according to the present invention are not limited to the above-described embodiments, and various modifications and improvements can be made within the scope described in the claims. For example, in the battery pack 10, the protrusion 14A is disposed between the operation portion 13A and the rear side edge 11a. However, the present invention is not limited thereto, and the protrusion 14A is disposed between the operation portion 13A and the lower side edge 11b. Also good. According to such a configuration, when the lower side edge 11b and the projecting portion 14A are grounded to the floor surface, the operation portion 13A is not grounded to the floor surface, and the urging portion 13C is not burdened. . In this case, the center of gravity of the battery pack 10 is preferably located between the lower side edge 11b and the protruding portion 14A in the vertical direction.

  In the present embodiment, since notch mechanisms 13 and 13 are provided on both side surfaces 11B and 11B, respectively, protrusions 14A are provided on both side surfaces 11B and 11B. However, when the notch mechanism 13 is provided only on one side surface 11B, the protrusion 14A does not need to be provided on both side surfaces 11B and 11B, and is disposed only on the side surface 11B on which the notch mechanism 13 is provided. Just do it.

  The same effect can be obtained not only in the electric tool having the notch mechanism 13 on the battery pack 10 side but also in the electric tool having the notch mechanism on the handle side. Specifically, if the operation portion arranged on the handle is provided so as to protrude from the side surface of the battery pack, the electric power tool can be placed on the floor in the same manner as in the above-described embodiment by providing a protrusion on the battery pack. When placed on a surface, the operation unit can be prevented from contacting the floor surface.

  In the present invention, the example in which the notch mechanism 13 including the operation unit 13A is provided on the front side of the battery pack 10 has been described. However, the present invention is not limited thereto, and the notch mechanism 13 is provided on the rear side of the battery pack 10. The present invention can also be applied to tools. In this case, the same effect as that of the present invention can be obtained by replacing “front and back” defined in the present invention.

  The battery pack and the electric tool of the present invention can be used in an electric tool handled manually and a battery pack used for the electric tool.

The side view of the electric tool which concerns on embodiment of this invention. The perspective view of the battery pack which concerns on embodiment of this invention. Sectional drawing in the connection part vicinity of the battery pack which concerns on embodiment of this invention (1st position, 1st engagement position). Sectional drawing in the connection part vicinity of the battery pack which concerns on embodiment of this invention (2nd position, 2nd engagement position). The figure of the state which put the battery pack which concerns on embodiment of this invention on the floor surface (rear side edge grounding). The figure of the state which put the battery pack which concerns on embodiment of this invention on the floor surface (lower side edge grounding). The figure of the state which put the electric tool which concerns on embodiment of this invention on the floor surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Drill 2 ... Main part 2A ... Tool holding part 3 ... Handle 3A ... Trigger 10 ... Battery pack 11 ... Housing 11A ... Upper surface 11B ... Side 11C ... Rear 11D ... Lower surface 11E -Front side 11a-Rear side edge 11b-Lower side edge 12-Connection 12A-Terminal insertion part 12B-Rib 12C-Terminal 12a-Slot 12b-Guide groove 13-Notch mechanism 13A- Operation part 13B ... Engagement part 13C ... Biasing part 14 ... Upper housing 14A ... Projection part 15 ... Lower housing

Claims (10)

A housing having a substantially rectangular side surface;
A connecting portion provided in the housing and connected to an electrical device;
An operation unit disposed on the side surface and movable between a first position protruding from the side surface and a second position having a protruding amount smaller than the first position;
The operation portion is connected to the operation portion so as to be interlocked with the operation portion. The operation portion is disposed at a first engagement position where the operation portion is engageable with the electric device when the operation portion is at the first position. An engagement portion disposed at a second engagement position that is not engageable with the electrical device when in the second position;
An urging portion for urging the operation portion in a direction protruding from the side surface,
The side surface is provided with a protrusion protruding from the side surface,
The amount of protrusion of the protrusion is such that when the battery pack is placed on a flat surface with the side face down, the operation portion has the peripheral edge of the side surface and the protrusion contact the flat surface. A battery pack, wherein the battery pack is set so as to be in non-contact with or in contact with a flat surface but between the first position or the first position and the second position. The amount of protrusion of the protrusion is such that when the battery pack is placed on a plane with the side face down, both the peripheral edge and the protrusion are in contact with the plane. 2. The battery pack according to claim 1 , wherein the battery pack is set so as to be non-contact or in contact with the first position. The housing includes an upper surface connected to the side surface and provided with the connecting portion, a rear surface connected to the side surface and the upper surface, and a front surface connected to the side surface and the rear surface and opposite to the rear surface. And
The operation unit is disposed near the front surface of the side surface,
The peripheral edge has a rear side edge defined from a connection portion between the side surface and the rear surface;
The protrusion is provided on a side surface between the rear side edge and the operation part, and the protrusion and the rear side edge are in contact with each other and placed on the plane. The battery pack described.   4. The battery pack according to claim 3, wherein, on the side surface, a center of gravity is located between the protruding portion and the rear side edge. The housing has an upper surface connected to the side surface and provided with the connecting portion, and a lower surface connected to the side surface and positioned opposite to the upper surface,
The operation unit is disposed near the upper surface of the side surface,
The peripheral edge has a lower side edge defined from a connection point between the side surface and the lower surface,
The projecting portion is provided on a side surface between the lower side edge and the operation portion, and the projecting portion and the lower side edge are in contact with each other and placed on the plane. The battery pack according to claim 2.   6. The battery pack according to claim 5, wherein, on the side surface, there is a center of gravity position between the protruding portion and the lower side edge. A main body having an output part;
A gripping portion provided extending from the main body,
An electric tool comprising a battery pack detachably provided on the gripping part,
The battery pack
A housing having side surfaces;
A connecting portion provided on the housing and connected to the gripping portion;
An operation unit disposed on the side surface and movable between a first position protruding from the side surface and a second position having a protruding amount smaller than the first position;
The operation portion is connected to the operation portion so as to be interlocked with the operation portion, and is disposed at a first engagement position where the operation portion is engageable with the gripping portion when the operation portion is in the first position. An engagement portion disposed at a second engagement position that is not engageable with the grip portion when in the second position;
A biasing portion that biases the operation portion in a direction protruding from the side surface,
The side surface is provided with a protrusion protruding from the side surface,
The protrusion amount of the protrusion is such that when the power tool is placed on a flat surface with the side face down, the operation portion is not in contact with the flat surface together with the main body portion. Or a contact between the first position and the first position and the second position.   The projecting amount of the projecting portion is such that when the power tool is placed on a plane with the side face down, the main body and the projecting portion abut against the plane. The power tool according to claim 7, wherein the power tool is set to be in non-contact with or in contact with the first position. A main body having an output part;
A gripping portion provided extending from the main body,
A power tool including a battery pack that is detachably provided on the grip portion and includes a side surface,
The gripping part is
A connected portion for connecting the battery pack;
A first position that is disposed in the vicinity of the connected portion , on the side surface, and protrudes from the gripping portion in a state where the battery pack is connected, and a second position that is smaller than the first position. An operation unit movable between
Is operatively coupled to the operation section provided in the connected part, the operating part is disposed in the battery pack can be engaged first engagement position when in said first position, said operation unit An engagement portion disposed at a second engagement position that cannot be engaged with the battery pack when the battery pack is at the second position;
An urging portion for urging the operation portion in a direction protruding from the side surface.
A housing having side surfaces;
A connecting portion provided in the housing and connected to the connected portion;
An engaged portion that is provided in the connecting portion and engages with the engaging portion,
The side surface is provided with a protrusion protruding from the side surface,
The protrusion amount of the protrusion is such that when the power tool is placed on a flat surface with the side face down, the operation portion is not in contact with the flat surface together with the main body portion. Or a contact between the first position and the first position and the second position. The projecting amount of the projecting portion is such that when the power tool is placed on a plane with the side face down, the main body and the projecting portion abut against the plane. The electric tool according to claim 9 , wherein the electric tool is set so as to be non-contact with or in contact with the first position.

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