JP2010046723A - Hand-held power tool with extension handle, and the extension handle for use of the hand-held power tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce load in mounting an extension handle when an off-lock switch for keeping a drive switch OFF is included. <P>SOLUTION: An attachment 21 to be mounted on a grip 11 of a tool body 1 includes an upper member 30 having an off-lock cancel part for unlocking the off-lock switch 8 and a lower member 31 having a drive switch operating part for turning ON the drive switch. The off-lock switch 8 is unlocked by mounting the upper member 30 on the grip 11, and the drive switch is turned ON by mounting the lower member 31 on the grip 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hand-held power tool with an extension handle that can be used while holding a grip portion and can be used with an extension handle, and an extension handle for a hand-held power tool. .

  Conventionally, there are various types of hand-held power tools of this type such as hand-held power clippers, and the work is performed in a state where, for example, the knee is bent while gripping the grip portion. When the detachable extension handle is provided, by attaching the extension handle to the power tool, for example, work can be performed while standing, so that the burden on the waist and knees is particularly reduced. There is an advantage.

  Further, the electric tool is provided with a drive switch for turning on and off the drive unit, and when the extension handle is not used, the drive switch provided on the tool body side is operated by hand to perform the work. It will be. Therefore, it is necessary to turn on the drive switch on the tool body side even when the extension handle is used.

Therefore, the present applicant has already proposed a configuration in which the drive switch can be turned on by attaching the extension handle to the tool body (see Patent Document 1 below).
JP 2007-15089 A

  On the other hand, some electric tools include an off-lock switch that locks the drive switch in an off state so that the drive switch is not inadvertently turned on. However, in the already proposed one, when attaching the extension handle, it is necessary to operate the off-lock switch with one hand to release the lock and attach the extension handle to the grip part with the other hand. there were.

  Therefore, the present invention has been made in view of the above-described conventional problems, and in the case of providing an off-lock switch for locking the drive switch in the off state, the extension handle with the extension handle can be further reduced. It is an object to provide a hand-held power tool and an extension handle for the hand-held power tool.

  The present invention has been made to solve the above problems, and the hand-held power tool with an extension handle according to the present invention can be removably attached to a tool body having a gripping part and the gripping part of the tool body. An extension handle, and the tool body includes a drive switch for turning the drive unit on and off, and an off-lock switch for locking the drive switch in an off state. The extension handle includes a pole portion and the pole A hand-held power tool with an extension handle, comprising an attachment portion provided at one end of the portion and attached to the grip portion of the tool body, and a handle portion provided at the other end of the pole portion The part includes an off-lock release part for unlocking the off-lock switch, and a drive switch actuating part for turning on the drive switch, and the attachment part grips the tool body. When the first and second attachment operations are performed, the off-lock release portion unlocks the off-lock switch, and the second attachment operation thereafter causes the drive switch operating portion to turn on the drive switch. It is characterized by being.

  In the hand-held power tool with an extension handle having the above structure, the attachment portion includes an off-lock release portion and a drive switch operation portion. When the extension handle is attached to the grip portion of the tool body, first, When the attachment operation is performed, the off-lock switch of the tool body is unlocked by the off-lock release portion of the attachment portion. Thereafter, when the second attachment operation is performed, the drive switch of the tool body is turned on by the drive switch operating part of the attachment part. By performing the operation of attaching the extension handle to the tool body in this manner, the off-lock switch of the tool body can be sequentially unlocked, and the drive switch can be turned on.

  In particular, the attachment portion includes a first member having an off-lock release portion and a second member having a drive switch operation portion, and the off-lock switch is unlocked by attaching the first member to the grip portion, It is preferable that the drive switch is turned on by attaching the second member to the grip portion. The mounting part is composed of a plurality of members, and the off-lock release part and the drive switch actuating part are provided separately on the first member and the second member, so that the off-lock is provided for each member mounting operation. Since the switch and the drive switch can be operated one by one, each switch operation can be performed reliably. Also, since the off-lock release part and the drive switch operating part are separated into the first member and the second member, it is designed compared to the case where the off-lock release part and the drive switch operating part are provided on a single member. As the degree of freedom increases, the configuration of the off-lock release unit and the drive switch operating unit becomes simple.

  In addition, it is preferable that the first member is substantially C-shaped in cross-sectional view and has flexibility so that the opening is widened and configured to be temporarily fixed to the grip portion by the flexibility. When the first member is temporarily fixed to the grip portion, the unlocked state of the off-lock switch can be maintained even if the hand is released from the first member or the force for pressing the first member is weak. Then, the second member can be easily attached. And the structure of temporary fixation can be simplified by utilizing flexibility.

  On the other hand, the first member is configured to be attached to the grip portion from above, and the off-lock switch protrudes in the horizontal direction and is configured to be unlocked by pushing it in. The first member includes It is preferable that a taper surface for pressing the off-lock switch by sliding is formed as the off-lock release portion. If the first attachment work can be performed from above, it is easy to visually check the work and the subsequent second member attachment work is also easy. In addition, when the first member is attached to the grip portion from above, the taper surface is pushed in while sliding with the off-lock switch due to the relative downward movement of the first member. Can be unlocked by operation.

  Further, the first member is provided with restriction wall portions on both sides of the tapered surface, and the off-lock switch is relatively moved between the restriction wall portions when the first member is attached to the grip portion from above. It is preferable that Since the position of the first member with respect to the grip portion is regulated by both regulating walls, the first member can be securely attached to a predetermined position, and the off-lock switch is also unlocked with certainty.

  On the other hand, the mounting portion is composed of a plurality of members including a first member and a second member, and the plurality of members are hinged to each other and are configured to wind the grip portion in the circumferential direction. It is preferable to provide a connecting means for connecting the member located at one end of the member and the member located at the other end of the member. The first member and the second member may have a structure that is not connected to each other, but a plurality of members that constitute the attachment portion are hinged to each other and the grip portion is wound in the circumferential direction. After the work of attaching the first member to the grip portion, the work of attaching the second member can be performed easily and continuously, and the work of winding the grip portion makes it easy to attach. Further, both ends of the attachment portion are connected by the connecting means, and the attachment portion goes around the gripping portion.

  An extension handle for a hand-held power tool according to the present invention includes a pole portion having an attachment portion at one end and a handle portion at the other end, and a drive switch for turning on and off the drive portion and the drive An extension handle for a hand-held power tool that is detachably attached to the grip portion of the electric tool having an off-lock switch for locking the switch in an off state by the attachment portion, the attachment portion being an off-lock An off-lock release portion for unlocking the switch and a drive switch actuating portion for turning on the drive switch, and the attachment portion is a first portion when attached to the grip portion of the electric tool. The off-lock release unit unlocks the off-lock switch by the mounting operation, and the drive switch operating unit turns the drive switch by the second mounting operation following the first mounting operation. Characterized in that it is configured to the down state.

  As described above, by performing the work of attaching the extension handle to the gripping portion, the off-lock switch can be sequentially unlocked and the drive switch can be turned on, so that the extension handle can be used in an electric tool having an off-lock switch. Can be easily installed.

  Hereinafter, a handheld power tool with an extension handle and an extension handle for a handheld power tool according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a hand-held electric hair clipper with an extension handle according to the present embodiment. The electric clipper includes a tool main body 1 having a grip portion 11 and an extension handle 2 that can be detachably attached to the grip portion 11 of the tool main body 1.

  The tool body 1 is used alone as an electric clipper, and includes a blade 3 as a blade portion at a front end portion. The blade 3 can mow the turf while holding the grip portion 11. The grip portion 11 is provided in the main body housing 4. The main body housing 4 is formed by joining and dividing the left and right split members formed by injection molding from synthetic resin so as to form an internal space, and as shown in FIG. Is formed in a substantially D shape in side view so as to form a through hole 5 penetrating left and right. The head portion 12 on the front side of the main body housing 4 incorporates a motor (not shown) as a drive portion that drives the blade 3. The grip portion 11 extends from the head portion 12 toward the rear. As shown in FIGS. 6 to 10, the grip portion 11 has a cylindrical shape, specifically, a circular cross section or a vertically long oval shape, and is positioned above the through hole 5. As shown in FIG. 1, the gripping portion 11 is bent substantially horizontally at the beginning toward the rear from the head portion 12 and then gradually downward, and is integrated with the rear portion of the base portion 13 located below the through hole 5. It is connected to. In addition, the holding part 11 is extended in the front-back direction like FIG. 2 by planar view. The head portion 12 is integrally connected to the front portion of the base portion 13.

  The gripping part 11 is a part that is gripped by hand when the tool body 1 is used alone as an electric hair clipper, and is slippery on its surface to prevent slipping than other parts. A stop area is provided. The anti-slip region extends back and forth along the axial direction of the gripping portion 11 and occupies a substantially upper half region of the gripping portion 11. More specifically, as shown in FIG. 6 to FIG. 10, a non-slip region is formed by sticking a thin anti-slip member 14 made of an elastomer or the like on the surface of the grip portion 11.

  On the other hand, a power cord 6 on the main body side for supplying electric power to the motor is attached to the rear end portion of the main body housing 4 and extends rearward. A plug (not shown) is connected to the front end of the power cord 6 so as to be connected to a commercial power source. Is attached. An electrical wiring (not shown) for electrically connecting the power cord 6 on the main body side and the motor passes through the inside of the gripping part 11 and stops the motor (on / off) in the middle thereof. Drive switch 7 is provided. The operation part of the drive switch 7 protrudes downward from the lower surface of the gripping part 11 and is configured to be operated from below to above by a hand gripping the gripping part 11. Specifically, the drive switch 7 is a trigger type, and when the drive switch 7 is pressed upward, i.e., toward the inside of the gripping portion 11, the amount of protrusion is reduced and the motor is energized and turned on, When the pressing force is released, the original state with a large protrusion amount is restored, the motor is de-energized and the motor is turned off. FIG. 3 shows a state where the drive switch 7 is pushed and turned on. The drive switch 7 is provided on the side of the grip portion 11 near the head portion 12, that is, on the front side of the grip portion 11.

  Further, an off-lock switch 8 is provided for physically locking the drive switch 7 in the off state so that the drive switch 7 is not inadvertently turned on. The off-lock switch 8 is provided in the grip 11 as indicated by a broken line in FIG. Specifically, it is located on the front side of the grip portion 11 and slightly on the front side of the drive switch 7. Further, the off-lock switch 8 is normally urged in a protruding direction by a spring 9 which is an urging means as shown in FIG. 6 and protrudes in the horizontal direction from the side surface of the grip portion 11 to the side. The drive switch 7 is locked in an off state, that is, in a protruding state that protrudes greatly downward to prevent inward entry. When the off-lock switch 8 is pushed toward the inner side of the grip portion 11 against the biasing force of the spring 9 (see FIG. 7), the drive switch 7 is unlocked, and the drive switch 7 is pushed upward. It can be turned on. The off-lock switch 8 has a cylindrical shape, and the end surface 8a on the tip side is an outwardly convex curved surface.

  A slider 10 that supports the main body housing 4 is attached below the base portion 13 of the main body housing 4. The slider 10 serves as a reference for the trimming height, and is adjustably attached to the main body housing 4 so that the trimming height can be adjusted by adjusting the height of the blade 3 from the ground. ing. Furthermore, the slider 10 is provided with a blade edge guard portion 10a at the front position, and the length of the slider 10 including the blade edge guard portion 10a in the front-rear direction is longer than that of the tool body 1, and thus the tool body 1 Is inclined in the front-rear direction, and the blade height of the blade 3 is suppressed from fluctuating. Moreover, the slider 10 is formed in a dish shape, and also functions as a chip receiver that receives cut grass and the like and places it on the grass.

  The extension handle 2 attached to the grip portion 11 of the tool body 1 includes a cylindrical pole portion 20 and an attachment portion that is provided at one end of the pole portion 20 and is detachably attached to the grip portion 11 of the tool body 1. 21 and a handle portion 22 provided at the other end of the pole portion 20.

  The handle portion 22 is a portion that is gripped in place of the grip portion 11 when the extension handle 2 is attached to the tool body 1 and used, and can be turned on and off by the motor. That is, similarly to the drive switch 7 on the tool body 1 side, a sub drive switch 23 is provided that is operated to control on / off of the motor, and the sub drive switch 23 is locked to the off state. An off-lock switch (not shown) is also provided. Therefore, when the extension handle 2 is used, a sub drive switch 23 and a sub-off lock switch on the extension handle 2 side are used instead of the drive switch 7 and the off-lock switch 8 on the tool body 1 side. A handle-side power cord 24 is provided at the rear end portion of the handle portion 22, and an electrical wiring 25 electrically connected to the handle-side power cord 24 passes through the inside of the handle portion 22. The sub drive switch 23 is connected in the middle of the electric wiring 25, and then the electric wiring 25 is gathered together on the front side of the handle portion 22 to form an intermediate cord 26, and the intermediate cord 26 extends from the handle portion 22 to the pole portion 20. Is inserted inside.

  The front end side of the intermediate cord 26 is pulled out from the opening on the side of the lower end portion of the pole portion 20 and folded upward, and is locked to a locking portion 27 provided on the outer peripheral surface of the lower end portion of the pole portion 20. Thus, the folded state is maintained. A plug (not shown) attached to the tip of the intermediate cord 26 is connected to the plug of the main body side power cord 6. Therefore, when the plug of the handle-side power cord 24 is connected to a commercial power source, the sub-off lock switch is unlocked and the sub drive switch 23 is turned on, power is supplied from the intermediate cord 26 to the main body-side power cord 6. The Therefore, if the drive switch 7 on the tool body 1 side is in the on state, the motor can be controlled on and off by operating the sub drive switch 23 of the handle portion 22.

  The attachment portion 21 has an inner surface formed in accordance with the surface shape of the grip portion 11, and an upper member 30 (first member, a member located at one end in the circumferential direction) and a lower member 31 (second member). ) And a connecting member 32 (a member located at the other end in the circumferential direction). As shown in FIGS. 3 to 5, the upper member 30, the lower member 31, and the connecting member 32 are hinge-connected to each other via hinge portions 33 and 34 having axes extending substantially horizontally in the front-rear direction. When the extension handle 2 is attached to the grip 11, the grip 11 is wound in the circumferential direction. 4 and 5, a fastening screw 35 described later is omitted.

  Specifically, as shown in FIGS. 3, 4, 6, and 7, the upper member 30 has a substantially C-shaped cross-sectional view that opens downward, and is in the front-rear direction, that is, the axial direction of the grip portion 11. It has a shape that extends. The upper member 30 is made of synthetic resin and has a predetermined flexibility, and the lower opening having a substantially C-shaped cross-sectional view widens from side to side due to the flexibility. As shown in FIG. 3, the upper member 30 is attached to the grip portion 11 from above. The attachment position is an anti-slip region of the grip portion 11, and the upper member 30 is fitted into the grip portion 11 from above. By attaching, the upper member 30 is temporarily fixed to the non-slip region by the flexibility of the upper member 30 itself. Further, the upper member 30 is a member attached to the pole portion 20, and therefore, the upper wall 30 is formed with a standing wall portion 40 that gradually rises toward the rear, and the rear end portion of the standing wall portion 40. The pole portion 20 is supported so as to be rotatable in the vertical direction. Note that serrations (not shown) are formed on the upper member 30 and the pole portion 20, respectively, so that the pole portion 20 can be fixed at an arbitrary angular position.

  Further, an off-lock release portion for unlocking the off-lock switch 8 is formed on one side of the upper member 30, specifically, on the front side position of the one side. That is, when the upper member 30 is attached to the grip portion 11 from above, the taper surface 41 that slides with the off-lock switch 8 by the relative downward movement of the upper member 30 and pushes it inward to release the lock, It is formed as an off-lock release part. As shown in FIGS. 6 and 7, the tapered surface 41 is formed on the inner surface of the side portion of the upper member 30 and is gradually inclined to the outer surface side toward the lower side. In addition, a vertical surface 42 that is continuous with the tapered surface 41 is formed below the tapered surface 41. When the upper member 30 is attached to the grip portion 11 from above, the vertical surface 42 becomes the guide surface first. Contact the off-lock switch 8. Further, a vertical surface 43 is continuously formed on the upper side of the taper surface 41. As shown in FIG. 7, when the upper member 30 is attached to the grip portion 11, it is off-locked to the upper vertical surface 43. The end face 8a on the front end side of the switch 8 comes into contact, and thereby the unlocked state of the off-lock switch 8 is maintained.

  In addition, on both the front and rear sides of the taper surface 41, restriction wall portions 44 are respectively formed. The restricting wall portion 44 is erected inward from both side edge portions of the tapered surface 41 and extends from both sides of the lower vertical surface 42 to both sides of the upper vertical surface 43. Therefore, as shown in FIGS. 5 and 11, when the upper member 30 is attached to the grip portion 11, the off-lock switch 8 is relatively moved toward the upper side between the two regulating wall portions 44. The front and rear positions of the upper member 30 with respect to the grip portion 11 are determined by the restriction wall portion 44 serving as a front and rear guide during attachment. In addition, the lower part of the inner surface (surface which mutually opposes) of both the control wall parts 44 becomes the guide inclined surface 44a which mutually spaces apart toward the lower side.

  Further, a hinge portion 33 is formed at a front side position of one side portion of the upper member 30, and the lower member 31 is hinged to the hinge portion 33 and pivots up and down. Conversely, a seat portion 50 for connecting the connecting member 32 is formed at the front side position of the other side portion of the upper member 30 as shown in FIGS. 4, 8 to 10, and 12. Yes. The seat 50 protrudes in a plate shape substantially horizontally toward the side, and a notch 51 that opens to the side is formed at the tip.

  On the other hand, the lower member 31 hinged to the upper member 30 has a drive switch operating portion for turning on the drive switch 7, and the drive switch 7 is turned on by attaching the lower member 31 to the grip portion 11. It is comprised so that it may be in a state. Specifically, as shown in FIGS. 8 to 10, the lower member 31 mainly covers the lower surface of the gripping portion 11, and the pressing portion 60 that pushes the drive switch 7 upward is actuated by the drive switch on the inner surface thereof. It is formed as a part. When the upper member 30 is attached to the grip portion 11 as shown in FIG. 8 and subsequently the lower member 31 is rotated so as to approach the grip portion 11, the pressing portion 60 moves the drive switch 7 upward as shown in FIG. And the drive switch 7 is turned on. In addition, since the unevenness | corrugation is formed in the surface of the holding part 11 before and behind the drive switch 7, the inner surface of the lower side member 31 is matched with the uneven | corrugated shape of the surface of the holding part 11, as shown in FIG. It has a staircase shape, and a part thereof is a pressing portion 60.

  A connecting member 32 that is hinged to the lower member 31 via a hinge portion 34 and is pivotable up and down is a member that bridges between the upper member 30 and the lower member 31, A fastening screw 35 (connecting means) for connecting the member 30 and the connecting member 32 to each other is screwed. The fastening screw 35 is provided with a knob 35a at one end of the shaft 35b. When the upper member 30 and the connecting member 32 are connected to each other, as shown in FIG. Connection operation is possible. A nut 71 is inserted and fixed to the screw receiving portion 70 formed in the connecting member 32, and the other end portion of the shaft portion 35b of the fastening screw 35 is screwed into the nut 71. Further, as shown in FIG. 9, the screw receiving portion 70 and the knob portion 35a are screwed so as to form a predetermined interval. The predetermined interval is normally set slightly larger than the thickness of the seat portion 50 of the upper member 30. Then, when the connecting member 32 is turned upward with the hinge portion 34 as a turning fulcrum, the shaft portion 35b of the fastening screw 35 is formed in the notch 51 of the seat portion 50 of the upper member 30 as shown in FIG. The seat portion 50 is located between the knob portion 35 a and the screw receiving portion 70. By rotating the knob 35a of the fastening screw 35 from that state, the upper member 30 and the connecting member 32 can be connected and integrated, and the upper member 30, the lower member 31, and the connecting member 32 are annular. It goes around the gripping part 11.

  In the hand-held electric clipper with the extension handle 2 configured as described above, the electric clipper can be used alone without using the extension handle 2, or the extension handle 2 can be attached and used. . When attaching the extension handle 2, as shown in FIG. 1, the angle of the pole part 20 with respect to the attachment part 21 is set so that the pole part 20 becomes a substantially horizontal state. In this state, the attachment portion 21 is attached to the grip portion 11 as shown in FIG. 5. At this time, the handle portion 22 comes into contact with the placement surface S on which the tool body 1 is placed. Since the handle portion 22 is supported by the surface S, the extension handle 2 can be easily attached.

  When attaching the attachment portion 21 to the grip portion 11, first, the upper member 30 is temporarily fixed to the grip portion 11. Since the upper member 30 can be attached from above, the attachment work can be easily performed from above with the tool body 1 placed on the ground. In addition, the off-lock switch 8 is unlocked by this attachment operation, and positioning of the upper member 30 and thus the attachment portion 21 in the front-rear direction with respect to the grip portion 11 can be performed. In particular, by fitting the upper member 30 into the grip portion 11 from above, the off-lock switch 8 can be automatically unlocked by the tapered surface 41, and the operation for unlocking is easy.

  Next, following the mounting operation of the upper member 30, the lower member 31 is turned upward to push the drive switch 7 into the on state. 11, the upper member 30 does not need to be fixed by hand, or even if it is fixed by hand, the force is small. In particular, since the upper member 30 is temporarily fixed in the anti-slip region of the gripper 11, the upper member 30 is not displaced when the lower member 31 is rotated, and the lower member 31 is not displaced. As a result, the drive switch 7 can be surely pushed in by the pressing portion 60. Further, since the off-lock switch 8 has already been unlocked by the upper member 30, it is not necessary to perform the mounting operation with the other hand while unlocking the off-lock switch 8 with one hand as in the prior art.

  Subsequently, when the connecting member 32 is rotated upward, the shaft portion 35 b of the fastening screw 35 automatically enters the notch 51 of the upper member 30, and between the knob portion 35 a of the fastening screw 35 and the screw receiving portion 70. Since the seat portion 50 enters, the attachment portion 21 can be firmly attached to the grip portion 11 only by the operation of tightening the fastening screw 35 thereafter. Thus, since the notch 51 is formed in the seat portion 50, the fastening screw 35 can be screwed to the connecting member 32 in advance. Therefore, it is not necessary to screw the fastening screw 35 every time the mounting operation is performed. For example, it is possible to hold the knob 35a of the fastening screw 35 with one hand and pull the connecting member 32 upward to connect. Is extremely easy.

  In addition, since the attachment portion 21 is composed of three members hinged to each other and winds the grip portion 11, the attachment portion 21 is attached to the grip portion 11 as compared with a configuration in which the members are not connected and separated and independent. Work is easy.

  In this embodiment, the fastening screw 35 is operated from above, but it may be operated from the side. A plurality of fastening screws 35 can also be provided.

  Moreover, although the length of the front-back direction of the lower member 31 and the connection member 32 was shortened compared with the upper member 30 (the length of the front-back direction of the upper member 30 is lower than the lower member 31 and the connection member 32). However, it may be of the same length, and the shape and the like of these members can be arbitrarily changed. Furthermore, although the attachment part 21 was comprised from three members mutually hingedly connected, you may comprise from four or more members, or from two members. Furthermore, when the attachment portion 21 is constituted by a plurality of members, another member may be interposed between the upper member 30 (first member) and the lower member 31 (second member). However, it is preferable to connect the lower member 31 to the upper member 30 because the lower member 31 can be attached immediately after the upper member 30 is attached. Moreover, although the upper member 30 was attached to the holding part 11 first, the member attached first may be another member, and the upper member 30 may be attached second. Further, the mounting portion 21 is configured by a plurality of members that are hinge-connected to each other. However, for example, the mounting portion 21 is configured from two halved members that are not connected to each other without adopting a hinge-connected structure, and the two are fastened. It is good also as a structure integrated and connected by connection means, such as the screw | thread 35. FIG.

  Furthermore, although it was set as the structure which attaches the upper member 30 from upper direction, it can also be set as the structure attached from a side. Also, various modifications can be made to the temporary fixing structure of the upper member 30. In addition to using the flexibility of the upper member 30 itself, for example, a hooking portion is provided on the upper member 30, and the gripping portion 11 is provided. It is good also as a structure which is hooked and temporarily fixed, and may combine flexibility and the structure of other temporary fixing.

  The anti-slip member 14 is attached to the surface of the grip portion 11 to form the anti-slip region. It may be difficult.

  Further, the configuration of the drive switch 7 and the off-lock switch 8 can be changed as appropriate. For example, the drive switch 7 may be a push button type or the off-lock switch 8 may be a slide type. The off-lock switch 8 is preferably provided in the grip portion 11, but may be in the vicinity of the grip portion 11. Furthermore, the off-lock switch 8 may be provided on the upper surface of the grip portion 11, and the positions of the drive switch 7 and the off-lock switch 8 can be changed as appropriate.

  Furthermore, the type of the tool body 1 (electric tool) can be applied to a hedge trimmer, a sander, a grinder, a reciprocating saw, etc. in addition to a clipper.

The front view including the partial cross section which shows the hand-held power tool with an extension handle in one Embodiment of this invention. The top view containing the partial cross section of the hand-held power tool with an extension handle in the embodiment. The rear view including the partial cross section which shows the principal part of the hand-held power tool with an extension handle in the embodiment. The perspective view which shows the principal part of the hand-held power tool with an extension handle in the embodiment. The rear view of the principal part which shows the state in the middle of attaching the extension handle to a tool main body in the handheld electric tool with an extension handle in the embodiment. Sectional drawing which shows the state in the middle of attaching an extension handle to a tool main body in the BB line cross section of FIG. Sectional drawing which shows the state in the middle of attaching an extension handle to a tool main body in the BB line cross section of FIG. Sectional drawing which shows the state in the middle of attaching an extension handle to a tool main body in the AA sectional view of FIG. Sectional drawing which shows the state in the middle of attaching an extension handle to a tool main body in the AA sectional view of FIG. AA sectional view taken on the line AA of FIG. The principal part enlarged view of FIG. 3 which shows the state in the middle of attaching an extension handle to a tool main body. The principal part enlarged view of FIG. 2 which shows the state in the middle of attaching an extension handle to a tool main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tool main body 2 Extension handle 3 Blade 4 Main body housing 5 Through-hole 6 Main body side power cord 7 Drive switch 8 Off-lock switch 9 Spring 10 Slider 10a Blade edge guard part 11 Holding part 12 Head part 13 Base part 14 Non-slip member 20 Pole part 21 Mounting portion 22 Handle portion 23 Sub drive switch 24 Handle side power cord 25 Electrical wiring 26 Intermediate cord 27 Locking portion 30 Upper member (first member)
31 Lower member (second member)
32 Connecting member 33 Hinge part 34 Hinge part 35 Fastening screw 35a Knob part 35b Shaft part 40 Standing wall part 41 Tapered surface (off-lock release part)
42 Lower vertical surface 43 Upper vertical surface 44 Restriction wall portion 44a Guiding inclined surface 50 Seat portion 51 Notch 60 Pressing portion (drive switch operating portion)
70 Screw receiving portion 71 Nut S Placement surface

Claims (7)

A tool body having a grip part and an extension handle that can be detachably attached to the grip part of the tool body. The tool body has a drive switch for turning the drive part on and off, and the drive switch is locked in an off state. The extension handle is provided at one end of the pole part and attached to the grip part of the tool body, and provided at the other end of the pole part. A hand-held power tool with an extended handle having a handle portion;
The mounting portion includes an off-lock release portion for unlocking the off-lock switch, and a drive switch operating portion for turning the drive switch on,
When the attachment portion is attached to the gripping portion of the tool body, the off-lock release portion unlocks the off-lock switch by the first attachment operation, and the drive switch operation portion becomes the drive switch by the second attachment operation thereafter. A hand-held power tool with an extended handle, wherein the power tool is configured to be in an on state.   The attachment portion includes a first member having an off-lock release portion and a second member having a drive switch operation portion, and the off-lock switch is unlocked by attaching the first member to the grip portion, and the second member The hand-held power tool with an extension handle according to claim 1, wherein the drive switch is turned on by attaching the member to the grip portion.   3. The first member according to claim 2, wherein the first member is substantially C-shaped in cross-sectional view and is flexible so that the opening is widened and narrowed, and is temporarily fixed to the grip portion by the flexibility. Hand-held power tool with extension handle.   The first member is attached to the grip portion from above, and the off-lock switch protrudes in the horizontal direction and is unlocked by pushing it in. The first member includes an off-lock The hand-held power tool with an extension handle according to claim 2, wherein a taper surface for pressing the off-lock switch by sliding is formed as the release portion.   The first member is provided with restricting wall portions on both sides of the tapered surface, and the off-lock switch is configured to relatively move between the restricting wall portions when the first member is attached to the grip portion from above. The hand-held power tool with an extension handle according to claim 4.   The mounting portion is composed of a plurality of members including a first member and a second member, and the plurality of members are hinged to each other and wound around the grip portion in the circumferential direction. The hand-held power tool with an extension handle according to claim 2, further comprising connecting means for connecting the member positioned and the member positioned at the other end. Provided with a pole portion having a mounting portion at one end and a handle portion at the other end, a drive switch for turning the drive portion on and off, and an off-lock switch for locking the drive switch in an off state An extension handle for a hand-held power tool that is detachably attached to the grip portion of the power tool by the mounting portion,
The mounting portion includes an off-lock release portion for unlocking the off-lock switch, and a drive switch operating portion for turning the drive switch on,
When the attachment portion is attached to the grip portion of the electric tool, the off-lock release portion unlocks the off-lock switch by the first attachment operation, and the second attachment operation follows the first attachment operation. An extension handle for a hand-held power tool, wherein the drive switch operating part is configured to turn on the drive switch.

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