JP4421526B2 - Electric tool with detachable extension handle - Google Patents

Description

  The present application relates to an attaching / detaching mechanism for an extension handle, and more particularly, to an electric tool with an attachable / detachable extension handle.

  Conventionally, there are many hand-held power tools. There is an electric mower as an example of the electric tool. This hand-held electric mowing machine is generally a method in which the user trims the turf with his knees folded, and is particularly painful for the elderly. In order to alleviate this pain, there is an electric mower with a detachable extension handle that can be used while a user stands on a handheld electric mower.

  Such an electric mower with a detachable extension handle has been devised in various ways for the purpose of reducing fatigue on the user's work and improving work efficiency (for example, Patent Documents 1 to 3). .

  The mounting device described in Patent Document 1 includes a tool storage body provided with wheels, a long bar fixed to the tool storage body and extending in an upward direction, an operation switch provided at an end of the long bar, and the like. And a plug electrically connected to the switch or the like and connected to an electric tool housed in the tool storage body.

  In the mounting device of Patent Document 1 configured as described above, the user operates the electric tool with the handle by attaching the electric tool to the tool housing and connecting the power plug of the electric tool to the plug of the mounting device. It can be done and work while standing.

  Moreover, the electric gardening scissors described in Patent Document 2 are obtained by detachably connecting the bottom surface of the main body of the electric gardening scissors to the upper surface of a roller frame to which a handle extending obliquely upward is attached at the rear end.

  Moreover, the gardening clipper described in Patent Document 3 is obtained by fixing one end portion of an operation handle having a wheel extending obliquely upward to the bottom surface of the frame of the gardening clipper with a fixing screw.

Japanese Patent Publication No.59-51964 Japanese Utility Model Publication No. 49-128760 Japanese Utility Model Publication No. 54-4460

  The electric mowing machine becomes a large-scale structure due to its structure, which increases the size of the entire apparatus and increases the manufacturing cost.

  In addition, an additional board or plug for interlocking the operation switch of the electric mower with the switch provided on the handle is necessary, and the power supply line becomes complicated and the manufacturing cost increases due to this complexity. .

  The problems to be solved by the present application include the problems described above.

The present application has been made in view of the above-mentioned problems, and the problem is that it has a simple structure and is equipped with a detachable extension handle that can be easily attached and detached while pressing the trigger switch of the electric tool. It is to provide a power tool.

  Hereinafter, the present application will be described. In addition, in order to make an understanding of this application easy, the reference sign of an accompanying drawing is attached in brackets, However, This application is not limited to the form of illustration.

An electric tool (100) with a detachable extension handle according to claim 1 , wherein a main body (3) in which a drive part is built and a grip part (4) provided with a first switch (5) for driving the drive part. ), A first plug (22a) provided exposed outside the main body, a power tool (1), a joint portion (25) attached to the outer peripheral surface of the grip portion , and the joint An arm portion (30) having the other end attached thereto and extending in the upward direction, an operation handle portion (35) attached to one end of the arm portion, and an attaching / detaching means (40) for detachably attaching the joint portion to the grip portion ) and, provided with, on the inside of the arm portion and the operating handle, the connecting cord (51) is housed, the operating handle is electrically connected to the connection cord, subjected power to the power tool A second switch (37) to one end of the connecting cord, a second plug exposed to the outside from the joint portion, in its end, which is connected to the first plug (52) The other end of the connection cord is exposed to the outside from the rear of the operation handle portion, and the end portion thereof includes a third plug (53) connected to a power source for driving the electric tool, The joint portion includes an upper joint member (26) disposed on the upper side of the grip portion and a lower joint member (27) disposed on the lower side of the grip portion, and the attaching / detaching means includes the joint When the joint portion is attached to the outer peripheral surface of the grip portion by the attaching / detaching means, the upper joint member and the lower joint member maintain the state where the first switch is pressed. Characterized in that it.

The electric tool with a detachable extension handle according to claim 2 is the electric tool with a detachable extension handle according to claim 1 , wherein the lower joint member has an engaging portion (27a). The attachment / detachment means is provided on the upper joint member, and engages the engagement member (41) engaged with the engagement portion of the lower joint member, and engages the engagement member with the engagement portion. And engaging member moving means (42, 43, 44, 46) for moving the engaging member in the vertical direction.

The electric tool with a detachable extension handle according to claim 3 is the electric tool with a detachable extension handle according to claim 2 , wherein the detachable means is configured such that the engaging member engages the engaging portion. And adjusting means for adjusting the engaging force.

The electric tool with a detachable extension handle according to claim 4 is an electric tool with a detachable extension handle according to any one of claims 1 to 3 , wherein the lower joint member is substantially U-shaped. The lower joint member is formed in a letter shape and has an elastic force in the width direction, and the width between the end portions of the lower joint member is narrower than the width of the gripping portion. Is attached to the grip part, the lower joint member is attached to the grip part by the elastic force while pressing the first switch of the electric tool.

The electric tool with a detachable extension handle according to claim 5 is an electric tool with a detachable extension handle according to any one of claims 1 to 4 , wherein the connection cord is locked. A body (31) is provided.

An electric tool with a detachable extension handle according to claim 6 is the electric tool with a detachable extension handle according to any one of claims 1 to 5 , wherein the upper joint member and the lower joint member Is connected by a connecting member (28).

Power tool with wear de type extension handle of the present application, thereby reducing the cost can be manufactured with a simple structure. In addition, since the extension handle provided with the attaching / detaching means can be easily attached to and detached from the grip portion of the electric tool, a manual electric tool can be easily provided as an electric tool with an attachable / detachable extension handle.

  Hereinafter, the electric tool with a detachable extension handle of the present application will be described in detail. In this embodiment, a description will be given by applying a hand-held electric trimming machine as an electric tool to which a detachable extension handle is attached. However, any hand-held electric tool having a grip portion can be applied. For example, the present invention can also be applied to hedge trimmers, sanders, grinders, reciprocating saws, etc. that are generally used as electric tools.

  1 is a front view showing the overall structure of an electric mowing machine with an extension handle, FIG. 2 is an enlarged view of A shown in FIG. 1, FIG. 3 is a partial sectional view of an engagement body in a detachable metal fitting, and FIG. FIG. 5 is an enlarged view of the detachable metal fitting viewed from the B side in FIG. 1, and FIG. 6 is an operation explanatory view of the detachable metal fitting. For ease of explanation, in FIG. 1, the left side is assumed to be the front and the right side is assumed to be the rear. In the following description, the internal structure of the main body is the same as that of a general electric mowing machine, and therefore will be described briefly.

  The electric mower 100 with a detachable extension handle according to the present embodiment can mow the grass growing on the ground while the user is standing. In addition, the operation of starting the electric mower can be operated with the extension handle.

  As shown in FIG. 1, an electric mower 100 with a detachable extension handle includes an electric mower 1 having a grip portion 4, a joint portion 25 attached to the outer periphery of the grip portion 4, and the joint portion 25. An upwardly extending arm portion 30 attached, an operation handle portion 35 attached to the tip of the arm portion 30, and a detachable metal fitting 40 for detachably attaching the joint portion 25 to the grip portion 4 of the electric trimming machine 1; It has.

  As shown in FIG. 1, the electric mower 1 includes a main body 3 provided with a blade 2 for trimming turf so as to protrude downward and forward, and disposed below the main body 3 to support the main body 3 and from the ground. A main body positioning unit 10 for adjusting the height of the blade 2 and positioning the main body 3; a slider 15 having the main body positioning unit 10 disposed on the upper surface and sliding on the lawn growing on the ground G; 3 is fixed to the main body positioning unit 10 and the fixing tool 20 is fixed to the slider 15.

  A substantially D-shaped gripping portion 4 for a user to grip the main body 3 is formed at the rear portion of the main body 3. Further, inside the main body 3, a drive unit such as a motor for driving the blade 2 (not shown), a connection member such as a gear for transmitting power from the drive to the blade, a connection shaft for supporting the blade 2, and a drive unit are controlled. Built-in board for the purpose. Further, from the rear of the main body 3, a connection cord 22 for supplying power to be connected to the drive unit and the substrate is provided to be exposed to the outside. A male connection plug 22a connected to a power source for operating the drive unit is attached to the tip of the connection cord 22. A trigger switch 5 that is a first switch is provided in front of the inner periphery of the grip portion 4. The trigger switch 5 functions as a switch for driving the drive unit, and is connected to the substrate. And when this trigger switch 5 is pressed by the user, a drive part will start and the braid | blade 2 will act | operate. In this embodiment, the trigger switch is used, but a push button switch may be used.

  As shown in FIG. 1, the blade 2 has a surface of the blade 2 parallel to the ground. The blade 2 includes a comb-shaped upper blade 2a and a lower blade 2b each having a substantially fan shape, and the upper blade 2a is substantially overlapped with a slight gap on the upper surface side of the lower blade 2b. Are arranged together. The upper blade 2a and the lower blade 2b are supported by a connecting shaft (not shown) in the front inside of the main body 3 and are horizontally moved by a predetermined angle in the width direction of the main body 3 along the mutual surfaces. It can swing. When the drive unit is driven by the pressing of the trigger switch 5, the upper blade 2a and the lower blade 2b are moved to the left and right at a certain angle along the respective surfaces with the connecting shaft as a fulcrum in different directions via the connecting shaft. The swinging motion is repeated.

  Next, as illustrated in FIGS. 2 to 5, the joint portion 25 includes an upper joint member 26 and a lower joint member 27, and is disposed along the outer peripheral surface of the grip portion 4. Since the upper joint member 26 and the lower joint member 27 are both fixed to the grip portion 4, a string, rubber, chain, or the like is used so that the upper joint member 26 or the lower joint member 27 is not lost. They are connected by a connecting member 28. Preferably, the connecting member 28 may be an elastic member such as elastic rubber or a wire wound continuously in a curled shape.

  The upper joint member 26 is disposed on the upper portion of the grip portion 4 of the electric mower 1. The upper joint member 26 includes an end body 26a formed in accordance with the upper shape of the grip portion 4 of the electric trimming machine 1, and a cylindrical body 26b formed obliquely upward from the upper surface of the end body 26a. , And is configured. One end of an arm portion 30 made of a cylindrical bar is inserted and fixed to the cylindrical body 26b. Note that the arm portion 30 may be formed integrally with the cylindrical body 26b.

  In addition, a detachable fitting 40 is provided on the upper surface of the cylindrical body 26b. The attachment / detachment bracket 40 is for fixing the joint portion 25 to the grip portion 4 and for removing the joint portion 25 fixed to the grip portion 4 from the grip portion 4 and functions as the attachment / detachment means of the present application. It is.

  Further, as shown in FIGS. 2 to 5, one end of the mounting / demounting bracket 40 is rotatably supported via a shaft 29 at the rear of both side portions of the end portion body 26a, and the other end is the lower side described above. An engaging member 41 that engages with an engaging portion 27 a formed on the joint member 27 and an engaging body 42 that is attached to the upper surface of the cylindrical body 26 b and has an engaging portion 42 a that engages with the engaging member 41. An arm 43 that engages one end of the engaging body 42, a knob 44 that is engaged with the other end of the arm 43 and that is pivotally supported on the upper surface of the cylindrical body 26b by a shaft 45; In order to guide the engagement body 42 moving in the vertical direction along the outer peripheral surface of the cylindrical body 26b, a guide portion 46 formed integrally with the outer peripheral surface of the cylindrical body 26b and having a concave cross section. , And is configured.

  As shown in FIG. 6, the knob 44 is provided so as to be rotatable in the vertical direction of the cylindrical body 26 b via a shaft 45. When the joint portion 25 is not fixed to the grip portion 4, the knob 44 is provided to be inclined toward the guide portion 46 side of the cylindrical body 26 b, and the knob 44 is rotated upward and pushed down. Thus, the engaging body 42 is pulled up obliquely upward along the guide portion 46 formed on the outer peripheral surface of the cylindrical body 26b via the arm 43. As the engaging body 42 is pulled up, the engaging member 41 engaged with the engaging portion 42a of the engaging body 42 is also lifted obliquely upward along the outer peripheral surface of the cylindrical body 26b. As a result, the lower joint member 27 described above is pulled up toward the upper joint member 26 and fixed in close contact with the grip portion 4. At that time, the trigger switch 5 is pressed by the inner peripheral surface of the lower joint member 27, and the pressed state is maintained.

  The engaging member 41 is formed by bending a wire such as a wire. Examples of the material of the wire include a non-ferrous material and a steel material. Moreover, you may form with the resin material.

  As shown in FIG. 3, the engaging body 42 is disposed so as to be opposed to the engaging portion 42 a formed with a groove 42 c with which the distal end of the engaging member 41 engages. An arm attachment portion 42b that is attached by engaging one end of the attached arm 43, and a screw 42d that connects the engagement portion 42a and the arm attachment portion 42b are configured. A hole 42e and a screw hole 42f for attaching the screw 42d are formed in the engaging portion 42a and the arm attachment portion 42b, respectively. In addition, a screw groove that is screwed into the screw 42d is formed in the screw hole 42f formed in the arm attachment portion 42b. Therefore, when the screw 42d is rotated forward (clockwise), the screw 42d moves upward with reference to the arm mounting portion 42b whose position does not move, and at the same time, the engaging portion 42a is also pushed upward to move. That is, when the screw 42d is rotated forward, the distance S between the engagement portion 42a and the arm attachment portion 42b becomes small. On the other hand, when the screw 42d is reversely rotated (turned counterclockwise), the distance S between the engagement portion 42a and the arm attachment portion 42b increases.

  Thus, the distance S between the engaging portion 42a and the arm mounting portion 42b can be easily adjusted by the screw 42d. Further, by adjusting the distance S, the engaging member 41 can be lifted obliquely upward or downwardly obliquely along the guide portion 46, so that the engagement portion 27a of the lower joint member 27 described above can be It is possible to adjust the engaging force with which the mate engages. Specifically, as the engaging portion 42a is moved obliquely upward along the guide portion 46, that is, as the distance S is shortened, the engaging force becomes stronger.

  Thus, the engagement body 42 of this embodiment functions as the adjusting means of the present application. In addition, the engagement body 42, the arm 43, the knob 44, and the guide portion 46 of the present embodiment are configured so that the engagement member 41 is engaged with the engagement member 41 of the present application to the engagement portion 27a of the lower joint member 27. It functions as an engaging member moving means for moving in the vertical direction.

  Further, a plurality of engaging portions 42 a may be provided in the vertical direction along the guide portion 46 so that the engaging portion 42 a that engages with the engaging member 41 can be selected. In such a case, the higher the engaging portion 42a located on the guide portion 46, the stronger the engaging force.

  As shown in FIGS. 4 and 5, the lower joint member 27 is formed in a substantially U shape, has elasticity in the width direction, and is disposed below the grip portion 4. Further, the width between the end portions of the lower joint member 27 (inside dimension in which the grip portion 4 is fitted) is formed to be slightly smaller than the width (thickness) of the grip portion 4.

  The lower joint member 27 configured as described above can be independently attached to the grip portion 4 of the electric mower 1 by the elastic force.

  Therefore, it is possible to easily prevent the lower joint member 27 from falling off when the lower joint member 27 is attached below the grip portion 4 of the electric mower 1. In addition, the lower joint member 27 can be independently attached to the grip portion 4 of the electric mower 1 while the trigger switch 5 of the electric mower 1 is pressed. That is, by attaching the lower joint member 27 to the grip portion 4, the switch of the electric mower 1 can be always turned on (activated). In addition, operation of the switch for starting the electric mowing machine 1 is performed by the operation handle 35 mentioned later.

Further, when a switch (push button switch or the like) for driving the trigger switch 5 or the electric mowing machine 1 is provided on the upper part of the grip portion 4 or the like, the trigger switch 5 is pressed by the upper joint member 26. In this state, the joint portion 25 is attached to the grip portion 4.

  As shown in FIG. 4, engagement parts 27 a having a substantially inverted U shape are formed at both ends of the lower joint member 27 in the left-right direction in the drawing. The engaging portion 27a engages with the engaging member 41 as described above. The engaging portions 27a are not necessarily formed at both ends of the lower joint member 27, and may be formed at both side portions in the left-right direction of the outer peripheral surface of the lower joint member 27 in the drawing. .

  Next, as shown in FIG. 1, the arm portion 30 is formed in a cylindrical shape, the joint portion 25 is attached to one end portion, and the operation handle portion 35 is attached to the other end portion. ing. Further, a connection cord 51 for supplying power passes through the arm portion 30.

  Further, one end of the connection cord 51 is exposed to the outside on the side of the joint portion 25 to which one end of the arm portion 30 is attached. The exposed connection cord 51 is locked by a locking body 31 provided on the outer periphery of the arm portion 30, and an end of the connection cord 51 is connected to the electric trimming machine 1 as a first plug. A female plug 52 for connection which is a second plug connected to the male connection plug 22a is attached. Further, the locking body 31 may be freely movable on the outer peripheral surface of the arm portion 30. Moreover, the arm part 30 may combine a some cylinder and may be formed so that expansion-contraction is possible.

  By providing the locking body 31 that locks the connection cord 51 in this way, the connection cords 51 and 22 can be prevented from reaching the ground.

  Next, the operation handle portion 35 has a housing 35a, and a grip portion 36 for a user to hold the operation handle portion 35 is formed in the housing 35a. A connection cord 51 for supplying power passing through the inside of the arm portion 30 passes through the inside of the housing 35a. In addition, a trigger switch 37 that functions as a second switch that supplies electricity to the electric pruning machine 1 is provided in front of the inner periphery of the grip portion 36. When the trigger switch 37 is pressed by the user, electricity is supplied to the electric pruning machine 1.

  Thus, since the switch for driving the electric mowing machine 1 is provided in the operation handle portion 35, the operability at the time of driving the electric mowing machine 1 when mowing the lawn can be improved.

  The other end of the connection cord 51 is exposed to the outside behind the housing 35a. A connection plug 53 for power supply, which is a third plug for electrically connecting to an external power source, is attached to the exposed end portion of the connection cord 51.

  In this manner, by extending the power supply connection cord 22 to the rear of the operation handle portion 35, the mowing operation can be performed without worrying about the power cord in the grass mowing operation.

  In addition, this embodiment is one form and is not limited to this form.

  As described above, the electric mower 100 with the detachable extension handle according to the present embodiment includes the electric mower 1 having the grip portion 4, the upper joint member 26 disposed above the grip portion 4, A lower joint member 27 that is disposed below the grip portion 4 and presses the trigger switch 5 of the electric mower 1; an arm portion 30 that is attached to the upper joint member 26 and extends in an upward direction; and the arm portion And an attachment / detachment fitting 40 for detachably attaching the upper joint member 26 and the lower joint member 27 to the grip portion 4. Further, the lower joint member 27 has an engaging portion 27 a formed on the outer peripheral surface thereof, and the attachment / detachment bracket 40 is provided on the upper joint member 26, and one end thereof is rotated in the vertical direction via the shaft 29. An engagement member 41 that is pivotally supported and engages with the engagement portion 27a of the lower joint member 27, an engagement body 42 that engages with the other end of the engagement member 41, and one end of the engagement body 42. And a knob 44 that engages with the other end of the arm 43 and can be rotated in the vertical direction via the shaft 45. The knob 44 is rotated. Thus, the engagement member 41 can be moved in the vertical direction in a state where the engagement member 41 is engaged with the engagement portion 27a. And by the above operation, it is easy to attach the upper joint member 26 and the lower joint member 27 to the grip portion 4 of the electric mower 1 or to remove the upper joint member 26 and the lower joint member 27 from the grip portion 4. At the same time, the trigger switch 5 can be pressed or released.

  In the electric pruning machine 100 with the detachable extension handle of this embodiment configured as described above, the extension handle provided with the detachable metal fitting 40 can be easily detachably attached to the grip portion 4 of the electric pruning machine 1. Therefore, the manual electric mower 100 can be easily provided as an electric mower 100 with a detachable extension handle. Moreover, since it can be manufactured with a simple structure, the cost can be reduced. Furthermore, the user can attach the extension handle to the manual electric mower 100 and can easily perform the grass mowing work while standing.

It is a front view showing the whole electric trimming machine with an extension handle. It is an enlarged view of A shown in FIG. It is a fragmentary sectional view of the engaging body in the metal fitting for attachment / detachment. It is a fragmentary sectional view which shows a state when a joint member is arrange | positioned at a holding part. It is an enlarged view of the metal fitting for attachment / detachment seen from the B side of FIG. It is operation | movement explanatory drawing of the metal fitting for attachment / detachment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric trimming machine 4 Grasping part 5, 37 Trigger switch 22a Male connection plug 25 Joint part 26 Upper joint member 27 Lower joint member 28 Connection member 30 Arm part 31 Locking body 35 Operation handle part 40 Detachment bracket 41 Engagement Member 42 Engagement body 42a Engagement part 51 Connection cord 52 Female plug for connection 53 Connection plug for power supply

Claims (6)

A main body in which the driving unit is built; a gripping unit provided with a first switch for driving the driving unit;
An electric tool having a first plug exposed outside the main body ,
A joint part attached to the outer peripheral surface of the gripping part;
An arm portion extending in an upward direction and the other end attached to the joint portion,
An operation handle portion attached to one end of the arm portion;
An attachment / detachment means for detachably attaching the joint part to the grip part,
Equipped with,
A connection cord is accommodated inside the arm portion and the operation handle,
The operation handle portion is electrically connected to the connection cord, and includes a second switch for supplying power to the power tool ,
One end of the connection cord is exposed to the outside from the joint portion, and the end portion includes a second plug connected to the first plug,
The other end of the connection cord is exposed to the outside from the rear of the operation handle portion, and the end portion thereof includes a third plug connected to a power source that drives the electric tool,
The joint part is
An upper joint member disposed on the upper side of the grip portion;
A lower joint member disposed on the lower side of the grip portion, and
The attachment / detachment means is provided in the joint portion, and when the joint portion is attached to the outer peripheral surface of the grip portion by the attachment / detachment means, the first switch presses the upper joint member and the lower joint member. An electric tool with a detachable extension handle, characterized in that the held state is maintained . The lower joint member has an engaging portion,
The attaching / detaching means includes
Provided in the upper joint member;
An engaging member that engages with an engaging portion of the lower joint member;
Engagement member moving means for moving the engagement member in the vertical direction in a state where the engagement member is engaged with the engagement portion;
The electric tool with a detachable extension handle according to claim 1 . The attaching / detaching means includes
The electric tool with a detachable extension handle according to claim 2 , further comprising adjusting means for adjusting an engaging force with which the engaging member engages with the engaging portion. The lower joint member is
It is formed in a substantially U shape, has an elastic force in its width direction, and the width between the end portions of the lower joint member is narrower than the width of the gripping portion,
When the lower joint member is attached to the grip portion, the lower joint member is attached to the grip portion by the elastic force in a state where the first switch of the electric tool is pressed. The electric tool with a detachable extension handle according to any one of claims 1 to 3 . Wherein the outer peripheral surface of the arm portion, the electric power tool with a detachable extension handle according to any one of claims 1 to 4, characterized in that it comprises a locking member for locking the connection cord. The electric tool with a detachable extension handle according to any one of claims 1 to 5 , wherein the upper joint member and the lower joint member are connected by a connecting member.

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