JP7388314B2 - Retrofitted auxiliary switch device for power tools and power tools - Google Patents

Description

The present invention relates to a retrofitted auxiliary switch device for a power tool and a power tool.

2. Description of the Related Art Power tools that operate by operating a switch have been known. Patent Document 1 describes a power tool that includes a handle that is gripped by an operator, a cylindrical part that is disposed in front of the handle and houses a prime mover, and a casing that is disposed on the lower end side of the handle and the cylindrical part. There is. A first switch is provided on the handle of this power tool. The casing is provided with a second switch that cooperates with the first switch. The first switch can be operated with one hand of the operator. The second switch can be operated by the operator's other hand. When the operator operates both the first switch and the second switch, the prime mover operates and the drive shaft rotates. This prevents the hand on the opposite side from the hand that grips the handle portion from becoming an idle hand.

Japanese Patent Application Publication No. 2013-188854

However, according to the above configuration, the operator must always use both hands to operate both the first switch and the second switch of the power tool to perform the work. Therefore, even if it is desired to work with one hand from the viewpoint of workability, etc., there is a problem in that the power tool cannot be operated with one hand.

SUMMARY OF THE INVENTION An object of the present invention is to provide a retrofitted auxiliary switch device for a power tool and a power tool that can prevent the hand opposite to the hand that grips the handle from becoming an idle hand, as necessary.

A power tool retrofitting auxiliary switch device for achieving the above object includes a main body having an output part and a drive part for driving the output part, and a handle part extending from the main body and having a trigger switch. a main body; and a battery that is removably attached to the handle part and electrically connected to a terminal of the drive part, and when the trigger switch is pressed, the battery is connected to the battery. A retrofitting auxiliary switch device for a power tool applied to a power tool that electrically drives the drive unit by supplying electric power to the drive unit, the device being detachably provided with respect to the battery; A first connector part having a terminal electrically connected to a terminal of a battery; and a terminal detachably provided to the handle part and electrically connected to a terminal of the drive part. a second connector part, an electric circuit provided between the first connector part and the second connector part, a mounting part provided in a detachable manner with respect to the main body part, and a second connector part provided in the mounting part; and an auxiliary switch that opens and closes the electric circuit, and is configured such that the electric circuit is closed when the auxiliary switch is pressed.

Further, the power tool for achieving the above object includes a main body having the output part and a drive part for driving the output part, and a handle part extending from the main body and having a trigger switch. , comprising a battery that is removably attached to the handle portion and electrically connected to a terminal of the drive portion, and an auxiliary switch device for the power tool, the trigger switch being pressed and operated. The drive unit is configured to be electrically driven by supplying electric power from the battery to the drive unit when the drive unit is in use.

According to the above configuration, the retrofitted auxiliary switch device for a power tool is applied to the power tool, so that the operator can assist the retrofitted auxiliary switch device for the power tool with the other hand while grasping the handle part with one hand. A press operation can be performed on the switch. When the auxiliary switch is pressed by the operator, the terminals of the first connector section are electrically connected to the terminals of the battery, and the second connector is electrically connected to the terminals of the drive section. An electrical circuit is closed between the terminals of the In this state, the operator presses the trigger switch with one hand. When the trigger switch is pressed by the operator, battery power is supplied to the drive unit of the power tool body via the electric circuit of the retrofitted auxiliary switch device for the power tool, and the drive unit drives the output unit. That is, when the operator presses both the auxiliary switch and the trigger switch, the power tool main body is driven.

On the other hand, the battery can be directly attached to the power tool body without applying a retrofitted auxiliary switch device for the power tool to the power tool. In this state, if the operator presses the trigger switch with one hand while holding the handle part, battery power is supplied to the power tool body and the drive part of the power tool body is activated. Drives the output section.

As described above, by directly attaching the battery to the power tool body, the operator can operate the power tool body with one hand, thereby improving work efficiency. In addition, by installing a retrofitted auxiliary switch device for power tools between the power tool body and the battery, it is necessary to operate the power tool body with both hands, so the hand that grips the handle part is This prevents the opposite hand from becoming an idle hand, ensuring work safety.

Therefore, it is possible to provide a retrofitted auxiliary switch device for a power tool and a power tool that can prevent the hand on the opposite side from the hand that grips the handle from becoming an idle hand, as necessary.
In the power tool, the main body portion extends along an axis and has a housing portion that accommodates the drive portion, and the handle portion extends in a direction crossing the axis, The output portion is provided at a first end of the main body portion in the axial direction, and a second end of the housing portion opposite to the first end is provided at a first end in the axial direction than the handle portion. It is preferable that a protruding part is provided that protrudes in, and the attachment part is attached to an outer circumferential surface of the protruding part.

According to the same configuration, the attachment part of the retrofitted auxiliary switch device for power tools is provided on the protruding part of the storage part on the opposite side of the output part, so the auxiliary switch is also located on the opposite side of the output part. . As a result, the hand on the opposite side to the dominant hand that operates the trigger switch is separated from the output section, so the safety of the operator's hand on the opposite side to the dominant hand can be ensured.

In the power tool described above, it is preferable that the auxiliary switch is provided on an outer peripheral surface of the mounting portion.
According to this configuration, since the auxiliary switch is provided on the outer circumferential surface of the attachment portion, the auxiliary switch can be easily operated.

In the power tool, the attachment part partially covers the protrusion in the circumferential direction of the outer circumference of the protrusion, and the cable tie wraps and fixes the attachment part around the outer circumference of the protrusion. It is preferable that it has an insertion hole through which it is inserted.

According to this configuration, the binding band can be inserted into the insertion hole of the attachment portion, and the binding band and the attachment portion can be wound and fixed around the outer circumferential surface of the protruding portion.
Further, a retrofitted auxiliary switch device for a power tool to achieve the above object includes a main body portion having an output portion and a drive portion for driving the output portion, a handle portion extending from the main body portion and having a trigger switch, and a handle portion. a power tool main body having a power cable including a terminal that extends from the power source and is electrically connected to a power source, and when the trigger switch is pressed, power is supplied from the power source to the drive portion. A retrofitting auxiliary switch device for a power tool that is applied to a power tool that electrically drives the drive unit by being connected to the power source, the device being detachably provided with respect to the power source, and electrically connected to the terminal of the power source. a first connector portion having a terminal connected to the power cable; a second connector portion detachably provided to the power cable and having a terminal electrically connected to the terminal of the power cable; an electric circuit provided between the first connector part and the second connector part; a mounting part detachably provided to the main body part; an auxiliary switch provided in the mounting part for opening and closing the electric circuit; and is configured such that the electric circuit is closed when the auxiliary switch is pressed.

According to the above configuration, the retrofitted auxiliary switch device for a power tool is applied to the power tool, so that the operator can assist the retrofitted auxiliary switch device for the power tool with the other hand while grasping the handle part with one hand. A press operation can be performed on the switch. When the auxiliary switch is pressed by the operator, the terminals of the first connector part are electrically connected to the terminals of the power supply, and the second connector is electrically connected to the terminals of the drive part. An electrical circuit is closed between the terminals of the In this state, the operator presses the trigger switch with one hand. When the trigger switch is pressed by the operator, power from the power source is supplied to the drive unit of the power tool body via the electric circuit of the retrofitted auxiliary switch device for the power tool, and the drive unit drives the output unit. That is, when the operator presses both the auxiliary switch and the trigger switch, the power tool main body is driven.

On the other hand, in a state where the power tool is not equipped with a retrofitted auxiliary switch device for power tools, a power source can be attached to the power tool main body. When the power supply is attached to the power tool body, the operator presses the trigger switch with one hand while holding the handle portion with the other hand. As a result, power from the power source is supplied to the power tool main body, and the drive section of the power tool main body drives the output section.

As described above, by directly attaching the power supply to the power tool body, the operator can operate the power tool body with one hand, thereby improving work efficiency. In addition, by connecting a retrofitted auxiliary switch device for power tools between the power tool body and the power source, it is necessary to operate the power tool body with both hands, so the hand that grips the handle part is This prevents the opposite hand from becoming an idle hand, ensuring work safety.

Therefore, it is possible to provide a retrofitted auxiliary switch device for a power tool and a power tool that can prevent the hand on the opposite side from the hand that grips the handle from becoming an idle hand, as necessary.

According to the present invention, it is possible to prevent the hand on the opposite side from the hand that grips the handle portion from becoming an idle hand, as necessary.

FIG. 1 is a side view showing a power tool to which the auxiliary switch device of the first embodiment is applied. The circuit diagram showing the electrical configuration of the power tool. 3-3 sectional view of FIG. 1. FIG. 3 is a side view showing the auxiliary switch device. FIG. 3 is an enlarged perspective view showing a mounting portion and an auxiliary switch. FIG. 3 is a sectional view showing a state in which the auxiliary switch is opened. FIG. 3 is a cross-sectional view showing a state in which the auxiliary switch is closed by being pressed by an operator. FIG. 3 is a perspective view showing the first connector section. FIG. 3 is a bottom view showing the first connector section. FIG. 3 is a perspective view showing the second connector section. FIG. 3 is a side view illustrating the work of directly attaching the battery to the power tool body. The perspective view which shows the state where a worker operates a power tool with both hands. FIG. 3 is a circuit diagram showing the electrical configuration of a power tool according to a second embodiment. FIG. 3 is a side view showing a state in which the auxiliary switch device is attached to the power tool body.

<First embodiment>
A power tool 10 according to a first embodiment will be described with reference to FIGS. 1 to 12.
The power tool 10 of the present embodiment is a rechargeable power tool that includes a power tool main body 20 and a battery 11 that is detachable from the power tool main body 20 and supplies power to the power tool main body 20.

As shown in FIG. 1, a power tool retrofit auxiliary switch device 60 (hereinafter referred to as "auxiliary switch device 60"), which will be described later, can be retrofitted between the power tool main body 20 and the battery 11.

(Battery 11)
As shown in FIG. 11, the battery 11 has a rectangular parallelepiped battery housing section 13 for housing battery cells, and a battery side connector 15, and is entirely covered with a case 12 made of synthetic resin. In this embodiment, the battery 11 is, for example, a secondary battery such as a lithium ion battery or a nickel metal hydride battery.

The battery-side connector 15 includes an insertion portion 16 that projects in a columnar manner from the upper surface (one of the outer surfaces) of the battery housing portion 13, and a pair of terminals 15A and 15B that are provided so as to be exposed on the outer surface of the insertion portion 16. . The pair of terminals 15A and 15B are provided on opposite sides of the outer circumferential surface of the insertion portion 16 and are connected to the positive and negative electrodes of the battery cell accommodated in the battery accommodating portion 13. The battery side connector 15 is detachable from a main body connector 26 provided in the opening 22A at the lower end of the power tool main body 20, and is also detachable from the first connector portion 42 of the auxiliary switch device 60. .

A fitting convex portion 17 is formed on the upper surface of the battery accommodating portion 13 (the surface on the battery side connector 15 side). The fitting convex portion 17 is provided in a rectangular area adjacent to the insertion portion 16 at a predetermined height with respect to the upper surface of the battery accommodating portion 13, and is located within the opening 22A at the lower end of the power tool body 20. It is possible to fit into the provided recess 22B.

A pair of locking portions 14B that protrude upward (toward the battery side connector 15 side) are provided at the upper part of the battery housing portion 13. The pair of locking portions 14B are locked into the pair of locking recesses 38 provided in the opening 22A at the lower end of the power tool main body 20, thereby allowing the battery 11 to be removed from the power tool main body 20. to regulate. A pair of lock release buttons 14A are provided on both sides of the battery accommodating portion 13, which are interlocked with the pair of locking portions 14B and can release the locking state of the locking portions 14B from the locking recess 38. There is. By pressing the pair of lock release buttons 14A from both sides, the worker W releases the locking state of the locking portion 14B from the locking recess 38, and detaches the battery 11 from the power tool main body 20. be able to.

(Power tool body 20)
The power tool main body 20 includes a main body 30 having a drive section 36, a handle section 21 that can be held by the operator W, and an output section 34 that rotates in response to the driving force of the drive section 36. Note that the power tool main body 20 is a ready-made product that is commercially available together with the battery 11.

The main body part 30 includes a cylindrical housing part 31 that extends along the axis X1 and houses the drive part 36. As shown in FIG. 2, the drive unit 36 is a DC motor that has a pair of terminals 36A and 36B and is driven by DC power. The shaft of the drive section 36 is connected to the shaft of the output section 34, and by driving the drive section 36, as shown in FIGS. The output section 34 rotates.

The housing portion 31 has a circular outer periphery and is made of synthetic resin or metal. The accommodating portion 31 includes a protruding portion 32 that protrudes rearward (towards the operator W) than the handle portion 21 . That is, a protruding portion 32 that protrudes further than the handle portion 21 in the axis X1 direction is provided at a second end of the accommodating portion 31 on the opposite side (rearward) to the first end in the axis X1 direction. The outer periphery of the protrusion 32 is circular. Note that the outer periphery of the protruding portion 32 (accommodating portion 31) is not limited to a circular shape, and may be, for example, an oval shape, a polygonal shape, or the like.

The handle portion 21 is covered with a synthetic resin or metal exterior body, and extends in a direction intersecting the axis X1 direction of the main body portion 30, that is, in a direction along the axis Y1. In this embodiment, the axis Y1 of the handle portion 21 is at an angle approximately perpendicular to the axis X1 of the main body portion 30. Note that the direction of the axis Y1 of the handle portion 21 is not limited to this, and may be at a different angle other than orthogonal to the axis X1.

The handle portion 21 includes a handle body 21A that can be held by the operator W with one hand, a body side connector 26 provided at the lower end of the handle body 21A, and a trigger switch 24 for operating the power tool body 20. The handle body 21A has a shape that allows the operator W to hold it with one hand. An opening 22A is formed in the lower part of the handle body 21A, into which either the battery 11 or a second connector section 50 of an auxiliary switch device 60, which will be described later, can be selectively inserted.

The opening 22A is recessed in the bottom surface of the handle body 21A. A main body side connector 26 is provided within the opening 22A. The main body side connector 26 has a pair of main body side terminals 27A and 27B arranged at positions facing each other, and when the battery side connector 15 is inserted into the opening 22A, the pair of terminals of the battery side connector 15 15A and 15B contact a pair of main body side terminals 27A and 27B (see FIG. 2).

As shown in FIGS. 1 and 11, the trigger switch 24 is a push-down switch located at the upper end of the handle body 21A. The trigger switch 24 is arranged at a position directly below the main body part 30 on the front surface (output part 34 side) of the handle main body 21A, and as shown in FIG. While holding the main body 21A, it can be pressed with the index finger F1 of the one hand H1 (right hand). The trigger switch 24 is a normally open switch, and when the operator W is not operating it, it is biased outward by the elastic force of an elastic body (not shown) and is in an open state (off state). On the other hand, when the trigger switch 24 is pressed against the elastic force by the worker W, the trigger switch 24 is brought into a closed state (on state).

The output section 34 has a cylindrical shape, is provided in front of the main body section 30, and is of a drill chuck type, for example, and can hold a drill bit (not shown) in the drill chuck. The output section 34 rotates in conjunction with the rotating shaft of the drive section 36 and transmits the rotational force of the drive section 36 to the drill bit.

(Auxiliary switch device 60)
As shown in FIGS. 2 and 4, the auxiliary switch device 60 includes a first connector section 42, a second connector section 50, and an electric circuit 40 provided between the first connector section 42 and the second connector section 50. and an auxiliary switch 68 that opens and closes the electric circuit 40. In addition, in this embodiment, the auxiliary switch device 60 for right-handed users will be illustrated. The first connector section 42 is detachably provided to the battery 11 and has terminals 42A and 42B that are electrically connected to the battery 11.

As shown in FIGS. 2 and 8, the first connector section 42 includes a housing 43 made of synthetic resin and a pair of terminals 42A and 42B held by the housing 43. The housing 43 has a cylindrical portion 43A having a cylindrical opening and a cover portion 43B that covers one opening of the cylindrical portion 43A. With the first connector section 42 attached to the battery 11, the terminals 42A, 42B of the first connector section 42 are connected to the corresponding terminals 15A, 15B of the battery 11.

The second connector section 50 is provided to supply power to the power tool main body 20, and one of the second connector section 50 and the battery 11 can be selectively attached to and detached from the power tool main body 20. Ru. As shown in FIGS. 4 and 10, the second connector section 50 is entirely covered with a case 51 made of synthetic resin, and includes a rectangular plate-shaped pedestal section 52 and an insert that protrudes from the top surface of the pedestal section 52. 55. Unlike the battery accommodating part 13 of the battery 11, the pedestal part 52 does not house a battery cell therein, and therefore has a smaller thickness in the vertical direction than the battery accommodating part 13. A fitting convex portion 53 is formed on the upper surface of the pedestal portion 52 (the surface on the insertion portion 55 side). The fitting protrusion 53 has substantially the same shape as the fitting protrusion 17 of the battery 11, and can be fitted into the recess 22B recessed from the opening 22A at the lower end of the power tool main body 20.

The insertion portion 55 is columnar, has a rectangular planar cross section, and can be inserted into the opening 22A of the handle portion 21. The insertion portion 55 has substantially the same shape as the insertion portion 16 of the battery-side connector 15. A pair of terminals 50A and 50B are provided on the outer periphery of the insertion portion 55 on opposite sides in the circumferential direction. When the second connector portion 50 is attached to the power tool main body 20, the pair of terminals 50A and 50B are connected to the pair of main body side terminals 27A and 27B in the power tool main body 20, respectively.

As shown in FIG. 2, the electric circuit 40 has a first electric wire 41 having a terminal portion connected to the terminal 42A of the first connector portion 42, and a terminal portion connected to the terminal 50A of the second connector portion 50. It includes a second electric wire 46 and an auxiliary switch 68 provided between the first electric wire 41 and the second electric wire 46.

As shown in FIG. 4, the first electric wire 41 and the second electric wire 46 are covered electric wires in which the periphery of the core wire is covered with an insulating coating. The core wire is made of metal such as copper or aluminum. The first electric wire 41 and the second electric wire 46 are electrically connected to the positive electrode of the battery 11. Further, the electric circuit 40 includes a third electric wire 48 that is electrically connected to the negative electrode of the battery 11. Since this third electric wire 48 is used as a ground line and is not provided with an auxiliary switch 68, the terminal 42B of the first connector section 42 and the terminal 50B of the second connector section 50 are always electrically connected. There is. Note that the present invention is not limited to this, and an auxiliary switch may be provided on the third electric wire 48 so that the energization of the third electric wire 48 can be turned on and off using the auxiliary switch.

The first electric wire 41 and the third electric wire 48 connected to the first connector part 42 are inserted into a corrugated tube 49 all together. The first electric wire 41 and the second electric wire 46 connected to the auxiliary switch 68 are inserted into the corrugated tube 49 all together. The corrugated tube 49 is made of synthetic resin and has flexibility.

As shown in FIGS. 3 and 5, the auxiliary switch device 60 connects the first electric wire 41 and the second electric wire 46 to the attachment portion 61 that can be attached to the power tool main body 20, and An auxiliary switch 68 is provided for turning on/off (opening/closing) by operation. The mounting portion 61 is made of synthetic resin and includes a plate-shaped curved portion 62 curved in a U-shape.

The curved portion 62 has a bent plate shape with a predetermined thickness, and is curved with a curvature that follows the outer circumferential shape of the protruding portion 32 of the power tool main body 20. Note that the curved portion 62 may be elastically deformable when attached to the outer periphery of the protruding portion 32 . The attachment portion 61 is, for example, integrally molded.

As shown in FIG. 3, the auxiliary switch 68 is provided on the diagonally upper right side when the accommodating portion 31 is viewed from the rear.
The binding band 67 is made of, for example, a synthetic resin, and has a string-like part 67A that is flexible and deformable, and a through-hole 67B that has a through hole through which the string part 67A passes.

As shown in FIGS. 6 and 7, the auxiliary switch 68 is a normally open switch, and includes a housing portion 64, a pressing portion 69, an elastic member 70 that biases the pressing portion 69 with elastic force, and a pair of It includes a contact portion 71 and a restriction portion 73 that restricts movement of the pressing portion 69. The housing portion 64 is disposed on one side of the middle portion of the curved portion 62 in the direction in which the curved portion 62 extends, and projects outward from the outer surface of the curved portion 62 in a box shape. The housing part 64 accommodates the elastic member 70, the pair of contact parts 71, and the regulating part 73, and is fixed to the curved part 62 so that a part of the pressing part 69 is exposed.

As shown in FIGS. 3 and 5, an insertion hole 66 through which a binding band 67 is passed is formed at the base end of the housing portion 64 along the direction in which the curved portion 62 extends. The pressing portion 69 has a cylindrical shape, for example, and can be pressed with the finger F2 (or palm) of the left hand H2 of the worker W (see FIG. 12). The elastic member 70 is made of an elastic body such as a spring, and urges the pressing portion 69 outward so that the auxiliary switch 68 is in an open state. The pair of contact portions 71 are electrically connected by a metal relay member 71A. When the pressing part 69 is pressed against the elastic force of the elastic member 70 and the pressing part 69 moves to the on position (the position shown in FIG. 7), one contact part 71 is connected to the terminal 41A of the first electric wire 41, The other contact portion 71 is connected to the terminal 46A of the second electric wire 46. Thereby, when the pressing part 69 is in the on position, the first electric wire 41 and the second electric wire 46 are electrically connected via the auxiliary switch 68. The restricting portion 73 has a shape that projects outward from the pressing portion 69, and is engaged with the inner wall of the housing portion 64 to move the pressing portion 69 biased by the elastic member 70 to the off position (see FIG. 6). position).

Next, how to use the power tool 10 will be explained.
(When working with the power tool 10 using both hands)
As shown in FIG. 1, an auxiliary switch device 60 is installed between the power tool main body 20 and the battery 11. Specifically, the second connector part 50 is attached to the power tool main body 20 by inserting the insertion part 55 of the second connector part 50 into the opening 22A at the lower end of the power tool main body 20. Further, when attaching the attaching portion 61, a binding band 67 is passed through the insertion hole 66 of the attaching portion 61. Then, with the curved part 62 in close contact with the outer periphery of the protruding part 32, the binding band 67 is wrapped around the outer periphery of the protruding part 32 to bind it. At this time, the mounting part 61 is attached to the protrusion so that the position of the auxiliary switch 68 is on the side of the protrusion 32 (on the side of one hand H1 which is the dominant hand of the worker W) in the circumferential direction of the protrusion 32. 32. When the auxiliary switch device 60 is attached to the power tool main body 20, the operator W can press the auxiliary switch 68 with the other hand H2 while holding the handle portion 21 with one hand H1.

Further, the first connector portion 42 is attached to the battery side connector 15 of the battery 11. As a result, the auxiliary switch device 60 is attached to the battery 11, and power can be supplied from the battery 11 to the power tool main body 20.

Next, as shown in FIG. 12, the worker W grasps the handle portion 21 with, for example, the right hand (one hand H1) and places the left hand (the other hand H2) on the protruding portion 32 and the mounting portion 61. Then, while pressing the pressing portion 69 of the auxiliary switch 68 with the index finger F2 of the left hand, the trigger switch 24 is pressed with the index finger F1 of the right hand. This causes the power tool 10 to operate and the drill bit to rotate.

Note that the order of assembling the attachment part 61, the first connector part 42, and the second connector part 50 is not limited to the above order, and can be changed to any order.
(When working with power tools with one hand)
As shown in FIG. 11, the battery 11 is attached to the power tool body 20 by inserting the insertion portion 16 of the battery 11 into the opening 22A of the power tool body 20. As a result, the power tool is in an assembled state, and power can be supplied from the battery 11 to the power tool main body 20. The worker W, for example, grips the handle portion 21 with his right hand (one hand H1) and presses the trigger switch 24 with his right index finger F1 (his left hand is his idle hand). This causes the power tool 10 to operate and the drill bit to rotate.

The effects of the auxiliary switch device 60 and the power tool 10 of this embodiment will be explained.
(1-1)
In the power tool 10, the auxiliary switch device 60 is applied between the power tool main body 20 and the battery 11, so that the operator W can hold the handle part 21 with one hand H1 and assist with the other hand H2. A pressing operation can be performed on the auxiliary switch 68 of the switch device 60. When the auxiliary switch 68 is pressed by the other hand H2 of the worker W, the electric circuit 40 between the terminals 42A, 42B of the first connector part 42 and the terminals 50A, 50B of the second connector part 50 is closed. In this state, the worker W presses the trigger switch 24 with one hand H1. When the trigger switch 24 is pressed by the worker W, the electric power of the battery 11 is supplied to the drive section 36 of the power tool main body 20 via the electric circuit 40 of the auxiliary switch device 60, and the drive section 36 operates as an output section. 34. That is, when the operator W is pressing both the auxiliary switch 68 and the trigger switch 24, the power tool main body 20 is driven.

On the other hand, the battery 11 can be directly attached to the power tool main body 20 without using the auxiliary switch device 60. When the battery 11 is directly attached to the power tool main body 20, the operator W holds the handle portion 21 with one hand H1 and presses the trigger switch 24 with the other hand H1. As a result, the power of the battery 11 is supplied to the power tool main body 20, and the drive section 36 of the power tool main body 20 drives the output section 34.

As described above, by directly attaching the battery 11 to the power tool main body 20, the worker W can operate the power tool main body 20 with one hand, thereby improving work efficiency. Furthermore, by connecting the auxiliary switch device 60 between the power tool main body 20 and the battery 11, it is necessary to operate the power tool main body 20 with both hands. The hand H2 on the opposite side is prevented from becoming an idle hand, and work safety can be ensured.

Therefore, it is possible to prevent the hand H2 on the opposite side from the hand H1 that grips the handle portion 21 from becoming an idle hand, if necessary.
(1-2) The main body part 30 has a housing part 31 that extends along the axis X1 and houses the drive part 36, and the handle part 21 extends in a direction crossing the axis X1. There is. An output portion 34 is provided at a first end of the main body portion 30 in the axis X1 direction, and an output portion 34 is provided at a second end opposite to the first end of the housing portion 31 in the axis X1 direction than the handle portion 21. A projecting portion 32 is provided. The attachment portion 61 is attached to the outer peripheral surface of the protrusion 32 .

In this way, since the mounting portion 61 of the auxiliary switch device 60 is provided on the protruding portion 32 on the second end side of the main body portion 30, the auxiliary switch 68 is also located on the second end side of the main body portion 30. Become. As a result, the hand opposite to the dominant hand that operates the trigger switch 24 is removed from the output section 34, so the safety of the hand opposite to the dominant hand of the worker W can be ensured.

(1-3) The auxiliary switch 68 is provided on the outer peripheral surface of the mounting portion 61.
In this way, since the auxiliary switch 68 is provided on the outer peripheral surface of the mounting portion 61, the auxiliary switch 68 can be easily operated.

(1-4) The attachment part 61 partially covers the protrusion part 32 in the circumferential direction of the outer circumferential surface of the protrusion part 32, and has a cable tie that wraps and fixes the attachment part 61 around the outer circumferential surface of the protrusion part 32. It has an insertion hole 66 into which the hole 67 is inserted.

In this way, the binding band 67 can be inserted into the insertion hole 66 of the attachment part 61, and the binding band 67 and the attachment part 61 can be wound and fixed around the outer peripheral surface of the protrusion part 32.
(1-5) The battery 11 has an insertion portion 16 and a fitting convex portion 17 that are inserted through the opening 22A that opens on the distal end surface of the handle portion 21, and the second connector portion 50 has a fitting convex portion 17. It has an insertion portion 55 and a fitting projection 53 having substantially the same shape as the fitting projection 17 .

In this way, it is possible to prevent other members from being incorrectly attached to the opening 22A of the handle portion 21.
<Second embodiment>
A power tool 80 according to a second embodiment will be described with reference to FIGS. 13 and 14. The second embodiment will be described below. The power tool 80 of the second embodiment does not include the battery 11 and is supplied with power from an external power source 87. In the following, the same components as those in Embodiment 1 will be given the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 13 and 14, the power tool main body 81 includes a plurality of power cables 82 that are connected to an AC power source 87 such as an external commercial power source and are led out from the lower end of the handle portion 21. . As shown in FIG. 13, the plurality of power cables 82 are connected to a main body side connector 85 via a converter 83 that converts power. The main body side connector 85 includes main body side terminals 82A and 82B. The converter 83 includes a rectifier that converts alternating current into direct current and a smoothing circuit that smoothes the output waveform of the rectifier.

The power supply 87 includes a power supply side connector 88. The power supply side connector 88 has a pair of terminals 88A and 88B. A power tool retrofit auxiliary switch device 90 (hereinafter referred to as "auxiliary switch device 90") can be connected between the main body side connector 85 and the power source side connector 88. The auxiliary switch device 90 includes a first connector section 91 , a second connector section 92 , and an electric circuit 93 provided between the first connector section 91 and the second connector section 92 . The first connector section 91 includes terminals 91A and 91B, and the second connector section 92 includes terminals 92A and 92B. The electric circuit 93 includes a first electric wire 41 having a terminal portion connected to the first connector portion 91, a second electric wire 46 having a terminal portion connected to the second connector portion 92, and a third electric wire 48. . Further, as shown in FIG. 14, the auxiliary switch device 90 is provided at an attachment portion 61 that is detachably provided to the main body portion 30 and an attachment portion 61 between the first electric wire 41 and the second electric wire 46. , and an auxiliary switch 68 that opens and closes the electric circuit 93. The electric circuit 93 is closed when the auxiliary switch 68 is pressed by the operator.

According to the second embodiment, the following effects are achieved.
(2-1)
According to the present embodiment, the power tool 80 has the auxiliary switch device 90 applied between the power tool main body 81 and the power source 87, so that the operator W is in a state where the handle portion 21 is gripped with one hand H1. Then, the user can press the auxiliary switch 68 of the auxiliary switch device 90 with the other hand H2. When the auxiliary switch 68 is pressed by the other hand H2 of the worker W, the first connector part 91 electrically connected to the power supply 87 and the terminals 36A and 36B of the drive part 36 are An electric circuit 93 with the second connector portion 92 to be electrically connected is closed. In this state, the worker W presses the trigger switch 24 with one hand H1. When the trigger switch 24 is pressed by the worker W, the power from the power source 87 is supplied to the drive section 36 of the power tool main body 81 via the electric circuit 93 of the auxiliary switch device 90, and the drive section 36 operates as an output section. 34. That is, when the operator W is pressing both the auxiliary switch 68 and the trigger switch 24, the power tool main body 81 is driven.

On the other hand, when the power tool 80 is not equipped with the auxiliary switch device 90, the power supply 87 can be attached to the power tool main body 81. With the power supply 87 attached to the power tool body 81, the operator W holds the handle portion 21 with one hand H1 and presses the trigger switch 24 with the other hand H1. As a result, power from the power source 87 is supplied to the power tool main body 81, and the drive section 36 of the power tool main body 81 drives the output section 34.

As described above, by directly attaching the power supply 87 to the power tool main body 81, the worker W can operate the power tool main body 81 with one hand, thereby improving work efficiency. Furthermore, by connecting the auxiliary switch device 90 between the power tool main body 81 and the power source 87, it is necessary to operate the power tool main body 81 with both hands. The hand H2 on the opposite side is prevented from becoming an idle hand, and work safety can be ensured.

<Example of change>
The above embodiment can also be modified and implemented, for example, as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

- Although the insertion portion 16 and fitting protrusion 17 of the battery 11 and the insertion portion 55 and fitting protrusion 53 of the second connector portion 50 have substantially the same shape, they are not limited to this, and may have completely different shapes. For example, in the opening 22A at the lower end of the power tool main body 20, a plurality of main body side connectors 26, which can connect and detach the insertion portion 16 and the fitting projection 17, the insertion portion 55, and the fitting projection 53 of different shapes, are installed. It may be provided.

- Although the attachment part 61 is configured to be attached to the protrusion part 32 by wrapping the binding band 67, the attachment part 61 may be attached to the protrusion part 32 without using the binding band 67. For example, the attachment portion may be attached to the protrusion 32 by making the curved portion of the attachment portion elastically deformable and wrapping the curved portion around the protrusion 32 .

- The auxiliary switch 68 may be provided at a position other than the outer circumferential surface of the mounting portion 61 as long as it can be operated by the worker W. For example, if the mounting portion 61 has a bottom portion that covers the rear end surface of the protruding portion 32, the auxiliary switch 68 may be provided on the outer surface of the bottom portion.

- Although the attachment portion 61 is configured to be attached to the outer circumferential surface of the protrusion 32, the present invention is not limited to this, and the attachment portion 61 may be attached to a portion of the main body portion 30 other than the protrusion 32. For example, the attachment portion 61 may be attached to a position on the output portion 34 side of the main body portion 30.

- In the first embodiment, the battery 11 is a rechargeable secondary battery, but is not limited to this. For example, it may be a primary battery such as a dry battery.
- In the second embodiment, the converting section 83 is provided in the power tool main body 81, but the present invention is not limited thereto. For example, a conversion section may be provided in a retrofitted auxiliary switch device for a power tool. Further, for example, when using a power tool main body driven by alternating current, such as an induction motor or a synchronous motor, it is not necessary to provide a conversion section.

- Although the power tool 10 is an electric drill that rotates a drill bit, it is not limited to this. For example, the present invention may be applied to an impact driver that applies a striking force in addition to rotational force, an electric hammer, an electric saw that vibrates back and forth, and the like.

- Although the auxiliary switch 68 is configured to be assembled to the mounting portion 61, it is not limited to this. For example, the auxiliary switch may be provided in the mounting portion 61 by insert molding in which the auxiliary switch is placed in a mold and resin is injected into the mold.

H1...Hand H2...Hand W...Worker 10...Power tool 11...Battery 15A, 15B...Terminal 16...Insertion part 20...Power tool body 21...Handle part 22A...Opening part 24...Trigger switch 27A, 27B...Body side terminal 30...Main body part 31...Accommodation part 32...Protrusion part 34...Output part 36...Drive part 36A...Terminal 36B...Terminal 40...Electric circuit 42...First connector part 42A...Terminal 42B...Terminal 50...Second connector part 50A... Terminal 50B... Terminal 55... Insertion part 60... Retrofitted auxiliary switch device for power tool 61... Mounting part 66... Insertion hole 67... Binding band 68... Auxiliary switch 69... Pressing part 80... Power tool 81... Power tool main body 82... Power cable 82A, 82B...Terminal 87...Power supply 90...Retrofitted auxiliary switch device for power tool 91...First connector part 91A...Terminal 92...Second connector part 92A...Terminal 93...Electric circuit

Claims (5)

a power tool main body having an output section and a drive section for driving the output section; a power tool main body having a handle section extending from the main body section and having a trigger switch; a battery that is electrically connected to a terminal of the drive unit, and when the trigger switch is pressed, power is supplied from the battery to the drive unit to electrically operate the drive unit. A power tool that is driven by
Equipped with a retrofitted auxiliary switch device for power tools,
The retrofitted auxiliary switch device for power tools includes:
a first connector portion that is detachably attached to the battery and has a terminal that is electrically connected to a terminal of the battery;
a second connector portion that is removably attached to the handle portion and has a terminal that is electrically connected to a terminal of the drive portion;
an electric circuit provided between the first connector part and the second connector part;
an attachment part that is removably provided to the main body part;
an auxiliary switch provided on the mounting part to open and close the electric circuit;
The electric circuit is configured to be closed when the auxiliary switch is pressed.
Electric tool. The main body part has a housing part that extends along the axis and houses the drive part,
The handle portion extends in a direction crossing the axis,
The output section is provided at the first end of the main body in the axial direction,
A protruding portion that protrudes further than the handle portion in the axial direction is provided at a second end of the accommodating portion opposite to the first end;
The attachment portion is attached to an outer peripheral surface of the protrusion,
The power tool according to claim 1 . The auxiliary switch is provided on the outer peripheral surface of the mounting portion,
The power tool according to claim 2 . The attachment portion partially covers the protrusion in the circumferential direction of the outer circumference of the protrusion, and has an insertion hole through which a binding band that wraps and fixes the attachment portion around the outer circumference of the protrusion is inserted. has holes,
The power tool according to claim 2 or 3 . A main body having an output part and a drive part for driving the output part, a handle part extending from the main body part and having a trigger switch, and a power cable including a terminal extending from the handle part and electrically connected to a power source. The present invention is applied to a power tool that includes a power tool main body having a main body, and that electrically drives the drive unit by supplying power from the power source to the drive unit when the trigger switch is pressed. A retrofitted auxiliary switch device for a power tool,
a first connector portion that is detachably attached to the power source and has a terminal that is electrically connected to a terminal of the power source;
a second connector portion that is detachably attached to the power cable and has a terminal that is electrically connected to a terminal of the power cable;
an electric circuit provided between the first connector part and the second connector part;
an attachment part that is removably provided to the main body part;
an auxiliary switch provided on the mounting part to open and close the electric circuit;
The electric circuit is configured to be closed when the auxiliary switch is pressed.
Retrofitted auxiliary switch device for power tools.