JP2012228741A - Electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric tool which can be improved so as not to unexpectedly intercept power supply of an external power source.SOLUTION: The electric tool includes a first power supply member 151 for supplying power to an electric motor 111 from the external power source, wherein one end is connected with an electric tool body 103 and a first electric terminal 161 is arranged on the other end; a second power supply member 153 having a second electric terminal 171 and selectively connected with the first power supply member 151 by making the second electric terminal 171 connect with the first electric terminal 161 and supplying power to the electric motor 111 from the external power source via the first power supply member 151; and a connection locking part 181 for maintaining a connection state by locking the connection between the first electric terminal 161 and the second electric terminal 171. One of the first electric terminal 161 and the second electric terminal 171 is set up to be a male terminal, and the other is set up to be a female terminal. Current conduction of the electric motor 111 can be possible only when the male terminal is inserted into the female terminal and the connection state between the male terminal and the female terminal is locked with the connection locking part 181.

Description

  The present invention relates to a hand-held power tool that performs a predetermined processing operation on a workpiece by a tip tool driven by a motor.

  Japanese Patent Laying-Open No. 2003-117855 (Patent Document 1) discloses a power supply connecting device for an electric tool provided with a socket for attaching / detaching a power cord to a housing. The socket has a socket-side electrode piece and a socket-side engagement portion. The plug provided at one end of the detachable power cord (extension cord) has a plug-side electrode piece and a plug-side engaging portion. When the plug is rotated relative to the socket to the first position, the engagement lock between the socket side engaging portion and the plug side engaging portion is released, and the plug side electrode piece is inserted into and removed from the socket side electrode piece. It is possible. On the other hand, when the plug-side electrode piece is inserted into the socket-side electrode piece, when the plug is relatively rotated to the second position with respect to the socket, the socket-side engaging portion and the plug-side engaging portion are engaged. Locked and the plug cannot be removed from the socket.

  In the case of the power supply connection device described in the above publication, the plug side electrode piece and the plug side electrode piece are electrically connected at the same time as the plug is inserted into the socket, and the plug engagement lock with respect to the socket Is a configuration performed in a state where the socket-side electrode piece and the plug-side electrode piece are connected. In other words, it is possible to drive the motor in a state where the lock of the plug with respect to the socket is not locked. For this reason, when a machining operation is performed in a state where the engagement lock is not performed, the power cord may be disconnected from the electric tool during the machining operation, and the power supply from the external power source may be cut off. There is room for.

Japanese Patent Laid-Open No. 2003-117855

  The present invention has been made in view of the above, and an object of the present invention is to provide an improved electric tool so that power supply from an external power source is not unexpectedly interrupted during work.

  In order to solve the above problems, according to a preferred embodiment of the present invention, an electric tool that performs a predetermined operation by driving a tip tool with a motor is configured. The “power tool for performing a predetermined work” in the present invention includes a hammer, a hammer drill, etc., in which the tip tool performs a linear operation in the long axis direction or a rotation operation around the long axis to perform a chipping operation or a drilling operation on a workpiece. Cutting tools, cutting tools such as circular saws that rotate the tip tool to cut the workpiece, tightening tools that rotate the tip tool to perform screw tightening work, and electric drills that perform drilling work In addition, it widely includes electric tools such as garden tools such as hedge clippers in which the tip tool performs a reciprocating linear motion to cut the hedge.

  The power tool according to the present invention includes a power tool body, a first power supply member, a second power supply member, and an engagement lock portion. The power tool body houses a motor. One end of the first power supply member is connected to the power tool main body, and the first electric terminal is provided at the other end. The first power supply member is provided as a member that supplies power to the motor from an external power source. The second power supply member has a second electric terminal, and the electric terminal is selectively connected to the first power supply member by being engaged with the first electric terminal, whereby the motor passes through the first power supply member. Are provided as members to be fed from an external power source. The engagement lock portion locks the engagement between the first electric terminal and the second electric terminal and maintains the engaged state. One of the first electric terminal and the second electric terminal is set as a male terminal, and the other is set as a female terminal. The male terminal is inserted into the female terminal, and the male terminal is inserted by the engagement lock portion. The motor can be energized only when the engagement state between the terminal and the female terminal is locked. The “first power supply member” in the present invention typically corresponds to a fixed cord fixed to the tool body, and the “first electric terminal” typically includes an end portion of the fixed cord. This corresponds to the tool-side connector set to. In addition, the “second power supply member” in the present invention typically corresponds to a power cord connected to an external power source, and the “second electrical terminal” typically includes an end portion of the power cord. This corresponds to the power cord side connector set to (1).

  According to a preferred embodiment of the present invention, the motor is connected to the motor only when the engagement state between the first electric terminal and the second electric terminal configured as the male terminal and the female terminal is locked by the engagement lock portion. Energization is possible. In other words, the motor cannot be energized unless locked by the engagement lock portion. Therefore, the worker can safely perform the machining operation because there is no fear of the external power supply being unexpectedly cut off during the machining operation.

According to a further aspect of the present invention, when the male terminal is inserted into the female terminal and the engagement state between the male terminal and the female terminal is locked by the engagement lock portion, the second power supply member The first power supply member is configured to be energized.
According to this aspect, it is possible to energize the motor when the second power supply member and the first power supply member are electrically connected.

According to the further form of this invention, it is comprised so that the insertion operation | movement to the female terminal of a male terminal and the engagement locking operation of the male terminal and female terminal by an engagement lock part may be performed separately. ing. The “engagement lock operation” in the present invention typically corresponds to an operation of rotating the male terminal and the female terminal around the axis (around the insertion operation direction).
According to this aspect, the motor can be energized only when the engagement locking operation between the male terminal and the female terminal is performed by the engagement lock portion.

According to the further form of this invention, the 1st electric power feeding member is comprised so that predetermined | prescribed bending shape may be hold | maintained while being comprised entirely or partially with a flexible member.
According to this aspect, when performing a machining operation, the state of the first power supply member connected to the electric power tool main body can be changed in a direction that does not interfere with the operation, and the state can be maintained.

According to the further form of this invention, it has an alerting | reporting part which alert | reports to a worker the energization possible state in which electricity supply to the motor was possible. As the “notification unit” in the present invention, light notification, sound notification, or both light and sound notification can be appropriately employed.
According to this aspect, the notification unit can notify the operator of the energized state of the motor.

  According to the present invention, an improved power tool is provided so that power supply from an external power source is not unexpectedly interrupted during work.

It is an external view which shows the whole structure of the hammer drill which concerns on embodiment of this invention, and shows the connection cancellation | release state of a cord. It is an expanded sectional view showing the connection release state of a cord. It is an expanded sectional view which shows the connection state of a cord. It is an external view of a tool side connector. It is a front view of a tool side connector. It is a front view of a power cord side connector.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. The present embodiment will be described using an electric hammer drill as an example of an electric tool. As shown in FIG. 1, a hammer drill 101 according to the present embodiment generally has a main body 103 that forms an outline of the hammer drill 101, and a long axis direction of the main body 103 (the left-right direction in FIG. 1). A hammer bit 119 that is detachably attached to one end side (tip region) via a tool holder 137, and a hand grip 109 as a main handle connected to the opposite side of the hammer bit 119 in the main body 103 are mainly configured. The The main body 103 corresponds to the “power tool main body” in the present invention, and the hammer bit 119 corresponds to the “tip tool” in the present invention. The hammer bit 119 is held by the tool holder 137 in a state where relative reciprocation in the long axis direction is possible and relative rotation in the circumferential direction is restricted.

  The main body 103 mainly includes a motor housing 105 that houses a drive motor 111 (not shown for convenience) and a gear housing 107 that houses a motion conversion mechanism 113, a striking element 115, and a power transmission mechanism 117. The rotation output of the drive motor 111 is appropriately converted into a linear motion by a motion conversion mechanism 113 mainly composed of a crank mechanism and then transmitted to the striking element 115, and the long axis of the hammer bit 119 is transmitted through the striking element 115. An impact force in the direction (left and right direction in FIG. 1) is generated. The rotation output of the drive motor 111 is appropriately decelerated by a power transmission mechanism 117 mainly composed of a plurality of gears, and then transmitted to a hammer bit 119 via a tool holder 137 as a final shaft. 119 is rotated in the circumferential direction. The drive motor 111 is configured to be energized and driven by a pulling operation by an operator of a trigger 109a disposed on the handgrip 109, and to be interrupted by releasing the pulling operation. In addition, about the specific structure of the motion conversion mechanism 113, the striking element 115, and the power transmission mechanism 117, since it is a well-known technique and is not directly related to this invention, the description is abbreviate | omitted. The drive motor 111 corresponds to the “motor” in the present invention.

  Next, the cord connecting device 150 that supplies electric power for driving the motor to the hammer drill 101 from an external power source will be described. As shown in FIG. 1, the cord connecting device 150 connects a fixed cord 151 fixed to the main body 103, a detachable power cord 153 connectable to an external power source, and both the cords 151, 153. The cord connector 155 is mainly configured. The fixed cord 151 corresponds to the “first power supply member” in the present invention, and the power cord 153 corresponds to the “second power supply member” in the present invention.

  The fixed cord 151 is fixed to the main body 103 via a cord guard 157. In the fixed cord 151, the end of the conductor is connected to the electric wire in the main body 103 at one end in the extending direction, and the tool side connector 161 is fixed to the other end in the extending direction. The code guard 157 is configured as a flexible code guard formed by a flexible member, and is configured to maintain a bent shape.

  The detachable power cord 153 is configured as a colored cord whose outer surface is colored and can be identified. The power cord 153 has a plug 154 that can be plugged into an outlet (not shown for convenience) as an external power source at one end in the extending direction, and the power cord side connector 171 at the other end in the extending direction. Is fixed.

  The cord connector 155 includes a tool side connector 161 fixed to the end of the fixed cord 151 and a power cord side connector 171 fixed to the end of the power cord 153. The tool side connector 161 corresponds to the “first electrical terminal” in the present invention, and the power cord side connector 171 corresponds to the “second electrical terminal” in the present invention.

  The tool side connector 161 is set as a male connector, and the power cord side connector 171 is set as a female connector. And after inserting the tool side connector 161 in the power cord side connector 171, when both the connectors 161 and 171 are rotated 90 degrees relatively, while the fixed cord 151 and the power cord 153 are electrically connected, The tool side connector 161 and the power cord side connector 171 are configured to be prevented from being detached and to maintain the connection state.

  Hereinafter, the structure of each of the connectors 161 and 171 will be described. As shown in FIGS. 2 to 5, the tool-side connector 161 includes a substantially cylindrical connector main body 163 fixed to the fixing cord 151 and a substantially cylindrical insertion portion 165 having a smaller diameter than the connector main body 163. . Further, two electrode pieces 167 of an anode and a cathode protrude from the end face of the insertion portion 165 in the axial direction with a predetermined length. The two electrode pieces 167 are configured as columnar pin members connected to the conductors 151 a of the fixed cord 151 inside the connector, and are arranged in an opposing manner in the radial direction of the insertion portion 165. That is, the two electrode pieces 167 are arranged at axially symmetric positions.

  As shown in FIGS. 2, 3, and 6, the power cord side connector 171 has a substantially cylindrical connector main body 173 fixed to the power cord 153, and the connector main body 173 has the tool side connector 161. A substantially circular receptacle 175 into which the insertion part 165 can be inserted is formed. Further, in the connector main body 173, two electrode pieces 177 of an anode and a cathode connected to the conductor 153a of the power cord 153 are arranged in an embedded state. The two electrode pieces 177 are arranged opposite to each other in the radial direction of the receiving port 175 so as to correspond to the electrode pieces 167 of the tool-side connector 161. In the connector main body 173 of the power cord side connector 171, two electrode pieces 167 for introducing the two electrode pieces 167 of the tool side connector 161 are introduced when the insertion portion 165 of the tool side connector 161 is inserted into the receiving port 175. An electrode piece guide hole 179 is formed. Each electrode piece guide hole 179 is formed as an arc-shaped long hole that opens in the bottom surface of the receiving port 175 and extends in the circumferential direction of the connector main body 173 within a predetermined angle (approximately 90 degrees). Each electrode piece 177 of the power cord side connector 171 is disposed so as to be placed on one end side in the circumferential direction at the hole bottom of the electrode piece guide hole 179, and in order to receive the electrode piece 167 of the tool side connector 161, A portion facing the guide hole 179 is formed in a substantially C shape with an opening.

  When the cord connector 155 according to the present embodiment is inserted into the receptacle 175 of the power cord side connector 171 after inserting the insertion portion 165 of the tool side connector 161, the cord connector 155 is rotated about 90 degrees in the circumferential direction. The electrode piece 167 of the side connector 161 is configured to come into contact with the electrode piece 177 of the power cord side connector 171, thereby enabling energization between the fixed cord 151 and the power cord 153.

  Next, the engagement lock portion 181 that locks the connection state of the cord connector 155, that is, the engagement state between the tool side connector 161 and the power cord side connector 171 will be described with reference to FIGS. The engagement lock portion 181 corresponds to the “engagement lock portion” in the present invention. The engagement lock portion 181 includes a guide groove 183 formed on the outer surface of the insertion portion 165 of the tool side connector 161 and a protrusion 185 formed on the inner surface of the receiving port 175 of the power cord side connector 171. The guide groove 183 includes a first guide groove 183a and a second guide groove 183b that are connected to each other and extend so as to intersect the axial direction and the circumferential direction. The second guide groove 183b extends within a range of at least 90 degrees in the circumferential direction at a portion of the insertion portion 165 adjacent to the connector main body 163. Two guide grooves 183 are provided at positions facing each other in the radial direction of the insertion portion 165. That is, they are arranged at axially symmetric positions, and each is shifted by 90 degrees in the circumferential direction with respect to the two electrode pieces 167.

  Two protrusions 185 are provided corresponding to the guide grooves 183, and are formed at positions facing each other in the radial direction of the receiving port 175. The two protrusions 185 relate to the circumferential direction with respect to the first guide groove 183a extending in the axial direction of the guide groove 183 when the insertion portion 165 of the tool side connector 161 is inserted into the receiving port 175 of the power cord side connector 171. Positioned to match position. At this time, the electrode piece 167 of the tool side connector 161 and the electrode piece 177 of the power cord side connector 171 are set so as to be shifted by 90 degrees in the circumferential direction.

  Next, an operation for connecting the tool side connector 161 and the power cord side connector 171 will be described. First, the positioning operation is performed so that the protrusion 185 and the first guide groove 183a of the guide groove 183 are aligned in the circumferential direction with respect to the insertion portion 165 of the tool side connector 161 and the receiving port 175 of the power cord side connector 171. As a result, the insertion portion 165 of the tool side connector 161 can be inserted into the receiving port 175 of the power cord side connector 171. That is, the tool-side connector 161 and the power cord-side connector 171 are configured to allow insertion only at a predetermined position where the protrusion 185 and the first guide groove 183a are aligned with each other in the circumferential direction. This state is shown in FIG. When the electrode piece 167 of the tool side connector 161 is positioned at the insertion allowable position by the above operation, the electrode piece 177 is disposed in the arc-shaped region of the electrode piece guide hole 179 of the power cord side connector 171. It is placed at the end opposite to the side (see the two-dot chain line in FIG. 6).

  After the above positioning operation, when the insertion portion 165 of the tool side connector 161 is inserted into the receiving port 175 of the power cord side connector 171, the protrusion 185 moves relatively along the first guide groove 183a. As a result, the tool side connector 161 and the power cord side connector 171 are guided to relatively move linearly. On the other hand, the electrode piece 167 of the tool side connector 161 is inserted into the electrode piece guide hole 179. When the protrusion 185 reaches the connection region of the first guide groove 183a with the second guide groove 183b, the tip of the electrode piece 167 of the tool side connector 161 reaches the bottom of the electrode piece guide hole 179. Then, the electrode piece 167 of the tool side connector 161 does not contact the electrode piece 177 of the power cord side connector 171.

  Next, when both the connectors 161 and 171 are relatively rotated in the circumferential direction, the protrusion 185 is relatively moved in the circumferential direction along the second guide groove 183b. At this time, the electrode piece 167 of the tool side connector 161 is also relatively moved along the electrode piece guide hole 179 in the circumferential direction, and when both the connectors 161 and 171 are relatively rotated approximately 90 degrees, The electrode piece 167 is in contact with the electrode piece 177 of the power cord side connector 171. As a result, the fixed cord 151 and the power cord 153 are electrically connected, and energization between them is possible. Further, in a state where the electrode pieces 167 and 177 are in contact with each other, the protrusion 185 engages (contacts) with the side surface of the second guide groove 183b in the circumferential direction, so that the shaft between the tool side connector 161 and the power cord side connector 171 The relative movement of the direction is restricted. As a result, the tool side connector 161 and the power cord side connector 171 are locked in an engaged state in which the tool side connector 161 and the power cord side connector 171 are prevented from being detached from each other, and the contact state between the electrode pieces 167 and 177 is maintained. The state in which the tool side connector 161 and the power cord side connector 171 are prevented from coming off corresponds to the “engagement lock state” in the present invention, and this state is shown in FIG.

  As described above, according to the present embodiment, after the tool side connector 161 is inserted into the power cord side connector 171, both the connectors 161, 171 are rotated relative to each other in the circumferential direction so that they are prevented from coming off from each other. Only when locked, both electrode pieces 167 and 177 are placed in contact. As a result, the fixed cord 151 and the power cord 153 are electrically connected, and the drive motor 111 can be energized from the external power source via the power cord 153 and the fixed cord 151. Therefore, by pulling the trigger 109a in this state, the drive motor 111 can be energized to perform a predetermined machining operation.

  That is, according to the present embodiment, the fact that the electrode piece 167 of the tool side connector 161 and the electrode piece 177 of the power cord side connector 171 are in contact with each other and are energized can be said to be in the tool side connector 161 and the power cord side. This means that the connectors 171 are in a locked state in which the connectors 171 are prevented from coming off. For this reason, the operator can perform the machining operation with peace of mind without worrying that the external power supply is unexpectedly interrupted during the machining operation.

  When removing the power cord 153 from the fixed cord 151, first, the tool side connector 161 and the power cord side connector 171 are relatively rotated in the direction opposite to that at the time of connection, so that the protrusion 185 is aligned with the second guide groove 183b. It moves to the connection area | region with the 1 guide groove 183a, and the engagement lock of both the connectors 161 and 171 is cancelled | released. Next, the power cord 153 can be removed from the fixed cord 151 by moving the connectors 161 and 171 linearly relative to each other in a direction away from each other.

  In the present embodiment, the power cord side connector 171 is attached with an alarm 187 for notifying the energization state of the drive motor 111. The alarm 187 corresponds to the “notification unit” in the present invention. The alarm device 187 is mainly composed of a plurality (two types) of LED lamps (light emitting diodes) 187a and 187b. One LED lamp 187a is defined as a lamp for informing a state where the drive motor 111 can be energized, and the other LED lamp 187b is defined as a lamp for informing a state where energization is impossible. When the tool-side connector 161 and the power cord-side connector 171 are normally connected, that is, in the locked state in which the tool-side connector 161 and the power cord side connector 171 are prevented from being detached, one LED lamp 187a is turned on and the other LED lamp 187b is turned off. In the unlocked state, the other LED lamp 187b is turned on and one LED lamp 187a is turned off. The plurality of LED lamps 187a and 187b are set to emit different colors when lit. For example, one LED lamp 187a emits blue light and the other LED lamp 193b emits red light. Therefore, according to the present embodiment, the operator can accurately know the connection state of the cord connector 155 depending on which color of the LED lamps 187a and 187b is lit.

  In addition, according to the present embodiment, the tube-shaped cord guard 157 that protects the fixed cord 151 is formed of a flexible member and is configured to maintain a predetermined bending shape. Therefore, the cord guard 157 can be arbitrarily bent and the bent shape can be maintained, so that when the machining operation is performed, the fixed cord 151 can be maintained in a direction that does not interfere with the operation.

  In the present embodiment, the power cord 153 is detachable from the fixed cord 151. For this reason, for example, by preparing several types of power cords having different lengths, it is possible to appropriately use them depending on the work place and purpose. Further, by making the power cord 153 a colored cord color-coded according to the length, it becomes easy to distinguish between the power cord used by itself and other power cords, for example, a power cord reel having a plurality of outlets. When power is supplied using the, it is possible to avoid accidentally removing other power cords.

In this embodiment, when the tool side connector 161 is inserted into the power cord side connector 171 and then both the connectors 161 and 171 are relatively rotated and locked, the electrode piece 167 of the tool side connector 161 and the power cord side The electrode piece 177 of the connector 171 comes into contact with this, so that the drive motor 111 can be energized. However, instead of this configuration, the locking of both the connectors 161 and 171 is detected, and the drive motor 111 is energized based on the detection signal You may change into the structure which enables.
That is, after the tool-side connector 161 is inserted into the power cord-side connector 171, when both the connectors 161 and 171 are relatively rotated and locked, the lock state is detected by a sensor, and a motor control controller (illustrated for convenience). When the detection signal from the sensor is input to (omitted), the controller enables the drive motor 111 to be energized. In this case, when the tool side connector 161 is inserted into the power cord side connector 171, the electrode piece 167 of the tool side connector 161 and the electrode piece 177 of the power cord side connector 171 may be in contact with each other.

  Further, the tool side connector 161 may be a female connector, and the power cord side connector 171 may be a male connector. Further, the engaging lock portion 181 constituted by the guide groove 183 and the projection 185 is provided with a projection 185 on the outer surface of the insertion portion 165 of the tool side connector 161 configured as a male connector, and configured as a female connector. It may be changed to a configuration in which the guide groove 183 is provided in the inner surface of the receiving port 175 of the power cord side connector 171.

  Moreover, although this Embodiment demonstrated the case where the hammer bit 119 performed the linear motion of a major axis direction, and the rotation operation | movement around a major axis as an example of an electric tool, it is not restricted to the hammer drill 101, It can be widely applied to hammers used for chiseling operations, screw tightening machines used for screw tightening operations, cutting tools such as circular saws that perform cutting operations, or garden tools such as hedge clippers used for hedge trimming operations It is.

In view of the gist of the invention, the following aspects can be configured.
(Aspect 1)
"Electric tool that performs a predetermined work by driving the tip tool with a motor,
An electric power tool body that houses the motor;
One end is connected to the electric tool body, the other end is provided with a first electrical terminal, and a first power supply member for supplying power to the motor from an external power source,
A second electric terminal, and the second electric terminal is selectively connected to the first power supply member by being engaged with the first electric terminal, whereby the first electric power supply member passes through the first electric power supply member. A second power supply member for supplying power to the motor from the external power source;
An engagement lock portion that locks the engagement between the first electrical terminal and the second electrical terminal and maintains the engagement state;
One of the first electric terminal and the second electric terminal is set as a male terminal, and the other is set as a female terminal. The male terminal is inserted into the female terminal, and the male lock is inserted by the engagement lock portion. An electric tool characterized in that energization of the motor is enabled only when the engagement state between the terminal and the female terminal is locked. "

(Aspect 2)
“The power tool according to aspect 1,
When the male terminal is inserted into the female terminal and the engagement state between the male terminal and the female terminal is locked by the engagement lock portion, the first power feeding from the second power feeding member is performed. A power tool configured to energize a member. "

(Aspect 3)
“The power tool according to aspect 1 or 2,
An insertion operation of the male terminal into the female terminal and an engagement locking operation of the male terminal and the female terminal by the engagement lock portion are separately performed. A power tool. "

(Aspect 4)
“Electric power tool according to any one of aspects 1 to 3,
The first power supply member is configured to be entirely or partially made of a flexible member and configured to maintain a predetermined bending shape. "

(Aspect 5)
“Electric power tool according to any one of aspects 1 to 3,
An electric tool comprising: a notifying unit for notifying an operator of an energized state in which energization of the motor is possible. "

(Aspect 6)
“The power tool according to aspect 1,
While maintaining the state in which the male terminal is inserted into the female terminal, the both terminals are relatively rotated around the axis, whereby the male terminal and the female terminal by the engagement lock portion are An electric tool characterized by being engaged and locked. "

(Aspect 7)
“The power tool according to aspect 6,
The male terminal has a cylindrical insertion part, and the female terminal has a receptacle that can be inserted and inserted into the insertion part and relatively rotated about an axis.
The engagement lock portion is provided on one of the outer surface of the insertion portion and the inner surface of the receptacle, and is provided on the other side with a guide groove that is connected to each other and extends in a cross shape in the axial direction and the radial direction. A protrusion that is movably fitted in the guide groove, and the protrusion is placed in a circumferential region of the guide groove so that the engagement lock between the male terminal and the female terminal is achieved. A featured electric tool. "

(Aspect 8)
“The power tool according to aspect 6 or 7,
When the male terminal and the female terminal are rotated relative to each other while maintaining the state where the male terminal is inserted into the female terminal, the electrode piece of the male terminal and the electrode piece of the female terminal are It is comprised so that it may mutually contact, The electric tool characterized by the above-mentioned. "

101 Hammer drill (electric tool)
103 Body 105 Motor housing 107 Gear housing 109 Hand grip 109a Trigger 111 Drive motor 113 Motion conversion mechanism 115 Impact element 117 Power transmission mechanism 119 Hammer bit (tip tool)
137 Tool holder 150 Cord connecting device 151 Fixed cord (first power supply member)
151a Conductor 153 Power cord (second feeding member)
153a Conductor 154 Plug 155 Cord connector 157 Cord guard 161 Tool side connector (first electrical terminal)
163 Connector body portion 165 Insertion portion 167 Electrode piece 171 Power cord side connector (second electrical terminal)
173 Connector body portion 175 Receiving port 175a Receiving port peripheral portion 177 Electrode piece 179 Electrode piece guide hole 181 Engagement lock portion 183 Guide groove 183a First guide groove 183b Second guide groove 185 Protrusion 187 Alarm (notification portion)
187a, 187b LED lamp

Claims (5)

An electric tool that performs a predetermined operation by driving a tip tool with a motor,
An electric power tool body that houses the motor;
One end is connected to the electric tool body, the other end is provided with a first electrical terminal, and a first power supply member for supplying power to the motor from an external power source,
A second electric terminal, and the second electric terminal is selectively connected to the first power supply member by being engaged with the first electric terminal, whereby the first electric power supply member passes through the first electric power supply member. A second power supply member for supplying power to the motor from the external power source;
An engagement lock portion that locks the engagement between the first electrical terminal and the second electrical terminal and maintains the engagement state;
One of the first electric terminal and the second electric terminal is set as a male terminal, and the other is set as a female terminal. The male terminal is inserted into the female terminal, and the male lock is inserted by the engagement lock portion. An electric tool characterized in that energization of the motor is enabled only when the engagement state between the terminal and the female terminal is locked. The electric tool according to claim 1,
When the male terminal is inserted into the female terminal and the engagement state between the male terminal and the female terminal is locked by the engagement lock portion, the first power feeding from the second power feeding member is performed. A power tool configured to energize a member. The electric tool according to claim 1 or 2,
An insertion operation of the male terminal into the female terminal and an engagement locking operation of the male terminal and the female terminal by the engagement lock portion are separately performed. A power tool. The electric tool according to any one of claims 1 to 3,
The first power supply member is configured to be entirely or partially made of a flexible member and configured to maintain a predetermined bending shape. The electric tool according to any one of claims 1 to 4,
An electric tool comprising: a notifying unit for notifying an operator of an energized state in which energization of the motor is possible.

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