JP4976170B2 - Impact tool - Google Patents

Description

  The present invention relates to a striking tool capable of performing a hammering operation on a workpiece (concrete) by causing a tool bit to perform a striking operation.

When working with a hammering tool, such as an electric hammer drill, hammering in hammer mode in which the tool bit strikes in the long axis direction is a state in which the power switch is turned on (from the viewpoint of reducing the burden on the operator) On the other hand, it is preferable that the tool bit can be fixed at the operating position. On the other hand, in the drilling operation in hammer drill mode in which the tool bit performs the striking operation and the rotation operation around the long axis, the trigger is fixed at the operating position due to the nature of the operation. It is preferable that the operator can freely operate between the initial position and the operation position without doing so. An electric hammer drill having a mechanism that meets such a demand is disclosed in, for example, Japanese Patent Application Laid-Open No. 2006-957 (Patent Document 1).
The electric hammer drill described in Patent Document 1 has two electric switches for energizing and driving the motor. When the mode switching member is switched to the hammer mode, the trigger is pushed and fixed to the operation position by the mode switching member, whereby one of the electric switches is switched to the on state. In this state, when the operator operates the switch operation member and switches the other switch to the on state, the motor is energized. At this time, the operator can perform the hammering operation with the hammer bit by continuously operating the motor without fixing the trigger to the pulling operation position with fingers (continuing to pull). On the other hand, when the mode switching member is switched to the hammer drill mode, the switch operating member is forcibly operated and fixed to the position where the other switch is turned on by the mode switching member. In this state, the operator can freely operate the trigger between the initial position and the operation position, and can perform a hammer drill operation by arbitrarily driving or stopping the motor.

As described above, in the electric hammer drill described in Patent Document 1, a so-called trigger lock-on mechanism that performs a hammering operation by fixing a trigger at a pulling operation position is realized by using a plurality of electric switches. The plurality of electrical switches are housed and arranged in the internal space of the tool body or the handgrip held by the operator, and are connected to the controller for controlling the driving / stopping of the motor by wiring, but there are a plurality of electrical switches. Therefore, the wiring for connection is complicated. Further, since a plurality of electrical switches are used, there is a problem in that the cost is high, and there is still room for improvement in this respect.
JP 2006-957 A

  In view of this point, the present invention aims to reduce costs and provide wiring for an electric switch for driving a motor energizing, in an impact tool capable of fixing a switch operating member at an operating position and performing a predetermined machining operation. An object is to provide a technique that facilitates handling and contributes to an improvement in assemblability.

In order to achieve the above object, preferred embodiments of the impact tool according to the present invention include a motor for driving a tool bit, a single electric switch, a first switch operating member, a biasing member, and a second switch. An operation member; and a mode switching member. The single electric switch can be switched between a turned-on state where current is supplied to the motor and a non-turned-on state where current is not supplied. The first switch operation member can be operated by a finger between an initial position and an operation position separated from the initial position by a predetermined distance. The biasing member applies a biasing force to the first switch operating member so as to maintain the first switch operating member at the initial position. The “biasing member” typically corresponds to a spring. The second switch operation member can be operated between the first operation position and a second operation position separated from the first operation position by a predetermined distance. When the operation position is operated, the operation position is maintained unless the operation to the opposite side is performed at each position. The mode switching member is a first drive mode for causing the tool bit to perform a machining operation only by a striking operation, a machining operation for the tool bit by a striking operation and a rotating operation, a machining operation by only a striking operation, and a processing by only a rotating operation The mode is switched between the second drive mode in which at least one of the operations is performed.
When the mode switching member is switched to the first drive mode side, the first switch operation member is fixed at the operation position, and the second switch operation member is allowed to move. In this state, the switching operation between the on state and the non-on state of the electrical switch by the second switch operation member is enabled. That is, the electric switch is switched to the on state by moving the second switch operating member to the second operating position with the fingers, and the electric switch is switched by moving the second switch operating member to the first operating position. It can be switched to the non-input state. On the other hand, in a state where the mode switching member is switched to the second drive mode side, the second switch operation member is fixed at the second operation position, and the movement operation of the first switch operation member is allowed. Placed in. In this state, the switching operation between the on state and the non-on state of the electrical switch by the first switch operation member is enabled. That is, the electric switch is switched to the on state by operating the first switch operating member to the operating position with a finger, and the electric switch is returned to the initial position by the urging force of the urging member of the first switch operating member. It can be switched to the non-input state.

According to a preferred embodiment of the present invention, there is provided a single electric switch that can be switched between a turned-on state where current is supplied to the motor and a non-turned state where current is not supplied, and the mode switching member is on the first drive mode side In the state switched to, only the operation of the second switch operating member is allowed. The second switch operation member is configured to be maintained at the operated position unless operated to the opposite side. Therefore, in the first drive mode, if the operator operates the second switch operating member at the second operation position where the electric switch is turned on to drive the motor to energize, then the second A predetermined machining operation can be continuously performed by driving the tool bit without fixing (continuously holding) the switch operation member at the second operation position with fingers.
On the other hand, in the state switched to the second drive mode, the electric switch is always urged from the operation position side to the initial position side, that is, by the first switch operation member that automatically returns to the initial position. The switching operation is performed. Therefore, in the second drive mode, the operator can freely operate the first switch operation member between the initial position and the operation position, and can perform a predetermined machining operation with the tool bit.
As described above, according to the present invention, when the tool bit is driven in the first drive mode, the first switch operating member of the automatic return type is fixed to the position where the electric switch is turned on. A mechanism (trigger lock-on mechanism) that maintains the closing state can be realized using a single electric switch. For this reason, wiring for connecting the electrical switch and the controller is easier than in the conventional case of using a plurality of switches. As a result, it is possible to improve the assemblability when assembling the impact tool by assembling various parts such as a motor and a drive mechanism for driving the tool bit in the tool body.
Further, according to the present invention, after the drive mode is switched by the mode switching member, the tool bit can be driven and a predetermined machining operation can be performed only by operating one switch operation member. improves.

In the further form of the impact tool which concerns on this invention, it has the operation mode switching part operated by the mode switching operation of a mode switching member. The operation mode switching unit relates to the first and second switch operation members, moves the first switch operation member to the operation position and fixes it to the operation position, and performs the second operation of the second switch operation member. The first switching position for releasing the fixation at the position and switching to the state in which the movement operation by the finger is allowed, and the second switch operation member are moved to the second operation position and fixed at the second operation position. In addition, the operation of the switch operation member is switched by releasing the fixation at the operation position of the first switch operation member and switching to the second switching position where the movement operation by the finger is allowed. It is supposed to be configured. In addition, there is an operation member that is movable between a first operation position for switching the electric switch to the on state and a second operation position for switching the electric switch to the non-on state.
The operation member includes a second switch operation member operated by a finger in a state where the mode switching member is switched to the first drive mode side and the operation mode switching unit is moved to the first switching position. Only in conjunction with each other and is moved between the first operating position and the second operating position, thereby switching between the on and off states of the electrical switch. The operating member is a first switch operation member operated by a finger in a state where the mode switching member is switched to the second drive mode side and the operation mode switching unit is moved to the second switching position. Only in conjunction with each other, it is moved between the first operating position and the second operating position, thereby switching between the on and off states of the electrical switch.

  In the present invention, “switching the electrical switch to the on / off state by the operating member” includes both modes in which the operating member directly switches the electrical switch or indirectly through the intermediate member. . In the present invention, “only interlock” means that, based on the mode switching operation of the mode switching member, typically, the operating member is one of the first and second switch operating members. Are connected and disconnected with respect to the other switch operation member, or the state in which the operation of the operation member does not affect (does not interfere with) the other switch operation member corresponds to this. The “interlocking” mode includes either a mode in which the operating member is directly connected to the first switch operating member or the second switch operating member, or a mode in which the operating member is indirectly connected via an intermediate member. Are also preferably included.

  According to the present invention, in the first driving mode, the operating member switches the electrical switch to the on state or the non-on state only in conjunction with the second switch operating member, and in the second driving mode, the operating member is The electric switch can be switched to the on state or the non-on state in conjunction with only one switch operating member. By adopting such a configuration, the single electric switch is turned on and off by using the first switch operating member or the second switch operating member in response to the switching of the drive mode by the mode switching member. Switching between states is realized.

In a further form of the impact tool according to the present invention, the first switch operating member is rotatable around the first axis in the direction intersecting the tool bit major axis direction, and is rotated around the first axis. It can be moved between the initial position and the operation position by moving. The second switch operation member is rotatable about a second axis parallel to the first axis, and is rotated about the second axis so that the first operation position and the second operation are performed. It can be moved between positions. The operating member is attached to the second switch operating member so as to be rotatable about a third axis parallel to the first axis. The rod-shaped member extends between the first switch operating member and the operating member, and one end in the extending direction is connected to the first switch operating member so as to be rotatable relative to the first switch operating member. The other end in the present direction is connected to the operating member so as to be relatively rotatable.
In the state where the mode switching member is switched to the first driving mode side and the operation mode switching unit is moved to the first switching position, the operating member is moved to the first switch operating member by the finger. When the rotary operation is performed between the operation position and the second operation position, the electric switch is switched between the on state and the non-on state by moving together with the second switch operation member. Further, the operating member is switched to the second drive mode side by the mode switching member, and when the operation mode switching unit is moved to the second switching position, the first switch operating member is moved from the initial position by a finger. When operated between the operation positions, it is rotated around the third axis in conjunction with the first switch operating member via the rod-shaped member, so that the electric switch is turned on and off. It is configured to switch.

  According to the present invention, the operation member is rotatably attached to the second switch operation member, and the operation member and the first switch operation member are connected to each other via the rod-like member so as to be relatively rotatable. By adopting such a configuration, the first switch operating member or the second switch operating member can be used corresponding to the switching of the drive mode by the mode switching member, although it is a simple configuration. The switching between the on state and the non-on state of the single electric switch is realized.

In a further form of the impact tool according to the present invention, the first switch operating member is not linked to the second switch operating member while being always linked to the operating member. The linked state is switched between the linked first linked state and the second linked state linked to the first switch operating member and not linked to the second switch operating member. The connecting member is further provided. Note that “linked” corresponds to a state in which an operation can be transmitted, and therefore “non-linked” corresponds to a state in which an operation cannot be transmitted. The linkage member is switched to the first linkage state when the mode switching member is switched to the first drive mode side, and is switched to the second linkage state when the mode switching member is switched to the second drive mode side. Can be switched.
The operation member is a state in which the mode switching member is switched to the first drive mode side, whereby the operation mode switching unit is moved to the first switching position, and the linkage member is switched to the first linkage state. Then, when the second switch operation member is moved and operated between the first operation position and the second operation position by fingers, the first operation position is interlocked with the second switch operation member via the linkage member. And the second operating position, thereby switching between the on and off states of the electrical switch. The operation member is switched to the second drive mode side by the mode switching member, whereby the operation mode switching unit is moved to the second switching position, and the linkage member is switched to the second linkage state. In the state, when the first switch operation member is moved between the initial position and the operation position by a finger, the first operation position and the second operation are interlocked with the first switch operation member via the linkage member. It is configured to move between positions, thereby switching between the on and off states of the electrical switch.

  According to the present invention, there is provided a linkage member that switches the state between the first linkage state and the second linkage state using the mode switching operation of the mode switching member, and operates via the linkage member. The member is linked to one of the first and second switch operating members, and the linkage is disconnected from the other. By adopting such a configuration, in response to the switching of the drive mode by the mode switching member, the single electric switch is turned on and off using the first switch operating member or the second switch operating member. Switching between input states is realized.

In a further form of the impact tool according to the present invention, the first switch operating member is disposed on the hand grip side and extends in the same direction as the extending direction of the hand grip, and the extending direction intermediate portion. In FIG. 2, the tool bit is pivotably attached around a first axis in a direction intersecting the long axis direction of the tool bit so as to be able to rotate between the initial position and the operation position. The second switch operating member is disposed on the tool main body side and extends in the same direction as the extending direction of the handgrip, and a second axis parallel to the first axis in the extending direction intermediate portion A rotating operation is possible between the first operating position and the second operating position by being rotatably mounted around. A connecting member is disposed at a connecting portion between the tool main body portion and the hand grip on one end side of the hand grip, and the connecting member extends in a direction intersecting the first switch operating member extending direction, and One end portion in the extending direction is coupled to one end portion in the extending direction of the first switch operation member so as to be rotatable relative to each other. The operating member extends on the tool main body side in the same direction as the extending direction of the second switch operating member and in a direction intersecting the extending direction of the connecting member, and one end portion in the extending direction is connected. The other end portion in the extending direction of the member is connected to be rotatable relative to the other end portion, and the other end portion in the extending direction is connected to one end portion in the extending direction of the second switch operation member to be turned in a relatively rotatable manner.
In the state where the mode switching member is switched to the first driving mode side and the operation mode switching unit is moved to the first switching position, the operating member is moved to the first switch operating member by the finger. When the rotation operation is performed between the operation position and the second operation position, the operation point is rotated between the first operation position and the second operation position using the connection point with the connecting member as a rotation fulcrum. Switch between the input state and non-input state. Further, the operating member is switched to the second drive mode side by the mode switching member, and when the operation mode switching unit is moved to the second switching position, the first switch operating member is moved from the initial position by a finger. When operated between the operation positions, the switch is rotated between the first operation position and the second operation position with the connection point with the second switch operation member as a rotation fulcrum, thereby turning on the electric switch. And a non-injection state.

  According to the present invention, as described above, on one end side of the hand grip, the connecting member is disposed at the connecting portion between the tool main body portion and the hand grip, and the first switch operation on the hand grip side is performed via the connecting member. By adopting a configuration in which the member and the operation member on the tool main body side are connected (interlocked), application to an impact tool having a handgrip having a vibration-proof structure is possible. The “vibration-proof handgrip” is a tool bit length for the tool body to prevent or reduce the vibration generated in the body of the impact tool when the impact tool is driven. A handgrip gripped by an operator arranged extending in a direction crossing the axial direction is connected to the tool bit long axis direction via a rotating shaft on one end side in the extending direction so as to be relatively rotatable. The other end side in the extending direction refers to a handgrip that is connected so as to be relatively movable in at least the long axis direction (the striking operation direction) of the tool bit via an elastic body such as a spring or rubber.

  According to the present invention, in an impact tool capable of fixing a switch operating member at an operating position and performing a predetermined processing operation, it is possible to facilitate the wiring of the electric switch for driving the motor and improve the assemblability. Contributed technology will be provided.

(First embodiment of the present invention)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. This embodiment will be described using an electric hammer drill as an example of an impact tool. FIG. 1 shows the overall configuration of the electric hammer drill, and FIG. 2 shows the configuration of the main part of the electric hammer drill. As shown in FIG. 1, the electric hammer drill 101 according to the present embodiment generally includes a main body 103 that forms an outline of the electric hammer drill 101, and one end region of the main body 103 in the longitudinal direction (the left side in the drawing). ) Connected to the tool holder 117, a hammer bit 119 detachably attached to the tool holder 117, and a handgrip 109 held by an operator connected to the other end (right side in the figure) of the main body 103 in the major axis direction. It is composed mainly of. The main body 103 corresponds to the “tool main body” in the present invention, and the hammer bit 119 corresponds to the “tool bit” in the present invention. The hammer bit 119 is capable of relative reciprocation in the major axis direction (major axis direction of the main body 103) with respect to the tool holder 117, and relative rotation in the circumferential direction is restricted. It is held in the state. For convenience of explanation, the hammer bit 119 side is referred to as the front, and the hand grip 109 side is referred to as the rear.

  The main body 103 mainly includes a motor housing 105 that houses the drive motor 111 and a gear housing 107 that houses the motion conversion mechanism 113, the striking element 115, and the power transmission mechanism 141. The drive motor 111 corresponds to the “motor” in the present invention. The drive motor 111 is arranged such that the rotation axis is in the vertical direction (vertical direction in FIG. 1) substantially orthogonal to the long axis direction of the main body 103 (that is, the long axis direction of the hammer bit 119). The rotational output of the drive motor 111 is appropriately converted into a linear motion by the motion conversion mechanism 113 and then transmitted to the striking element 115, and the major axis direction of the hammer bit 119 (the left-right direction in FIG. 1) via the striking element 115. Generates an impact force on. The rotation output of the drive motor 111 is appropriately decelerated by the power transmission mechanism 141 and then transmitted as a rotational force to the hammer bit 119, and the hammer bit 119 is rotated in the circumferential direction.

  As shown in FIG. 2, the motion conversion mechanism 113 converts the rotational motion of the drive motor 111 into a linear motion and transmits it to the striking element 115, and the crankshaft 121 driven via the drive motor 111, The crank mechanism is composed of an arm 123, a piston 125, and the like. The piston 125 constitutes a driver for driving the so-called striking element 115, and can slide in the cylinder 127 in the same direction as the long axis direction of the hammer bit 119.

  The striking mechanism 115 is slidably disposed on the bore inner wall of the cylinder 127, and striker 129 as a striking element driven linearly through the action of an air spring in the cylinder bore by the sliding motion of the piston 125; While being slidably disposed on the tool holder 117, it is mainly configured by an impact bolt 131 as an intermediate element for transmitting the kinetic energy of the striker 129 to the hammer bit 119.

  On the other hand, the tool holder 117 is configured to be rotatable and is configured to be rotated from the drive motor 111 via the power transmission mechanism 141. As shown in FIG. 2, the power transmission mechanism 141 meshes with the intermediate gear 133 that is rotationally driven by the drive motor 111, the intermediate shaft 135, the first bevel gear 137 that rotates together with the intermediate shaft 135, and the first bevel gear 137. A second bevel gear 139 that engages and rotates around the major axis of the main body 103 is transmitted to the tool holder 117 and further to a hammer bit 119 held by the tool holder 117. introduce.

  In addition, a clutch member 143 that transmits or blocks the rotational output of the drive motor 111 to the hammer bit 119 is interposed between the intermediate gear 133 and the intermediate shaft 135. The clutch member 143 is slidably mounted on the intermediate shaft 135, and slides along the intermediate shaft 135 to engage and engage with the clutch teeth of the intermediate gear 133, and the mesh engagement. It is switched between the power cut-off state in which is released.

The clutch member 143 is switched by operating a mode switching dial 165 that switches the driving mode of the hammer bit 119. The mode switching dial 165 corresponds to the “mode switching member” in the present invention. The mode switching dial 165 is attached to the motor housing 105 so as to be rotatable in a horizontal plane, and is disposed in the internal space of the main body 103 (gear housing 107) by the turning operation. The switching mechanism operates, and the clutch member 143 is slid along the intermediate shaft 135 to switch to the power transmission state or the power cutoff state.
Therefore, when the drive motor 111 is energized while the clutch member 143 is switched to the power cut-off state, only the motion conversion mechanism 113 is driven. The rotation output of the drive motor 111 is transmitted to the motion conversion mechanism 113, and the piston 125 of the motion conversion mechanism 113 performs a reciprocating linear motion in the bore of the cylinder 127. As the piston 125 moves linearly, the hammer bit 119 performs a striking operation from the piston 125 through the striker 129 and the impact bolt 131. Thus, in a state where the clutch member 143 is switched to the power cut-off state, the hammer bit 119 performs only a striking operation (hammer operation), and performs a hammer operation on the workpiece (concrete). Hereinafter, the drive mode in which the hammer bit 119 performs only the striking operation is referred to as a hammer mode.

  On the other hand, when the drive motor 111 is energized while the clutch member 143 is switched to the power transmission state, the power transmission mechanism 141 is driven in addition to the motion conversion mechanism 113. The rotation output of the drive motor 111 is transmitted to the tool holder 117 and the hammer bit 119 held by the tool holder 117 via the intermediate gear 133, the clutch member 143, the intermediate shaft 135, and the first and second bevel gears 137 and 139. Is done. Thus, the hammer bit 119 performs an axial striking operation and a circumferential rotational operation (drilling operation) to perform a hammer drilling operation on the workpiece (concrete). Hereinafter, the driving mode in which the hammer bit 119 performs the striking operation and the rotating operation is referred to as a hammer drill mode.

  In the present embodiment, although illustration is omitted for convenience, at least the first hammer mode and the second hammer mode for causing the hammer bit 119 to perform only the striking operation, and the hammer bit 119 for performing the striking operation and the rotating operation. It is possible to switch between hammer drill modes. That is, the first hammer mode position, the second hammer mode position, and the hammer drill mode position are set for the circumferential direction of the mode switching dial 165.

  Next, an operation unit for operating the drive motor 111 (hammer bit 119) to operate / stop will be described with reference to FIGS. 4 to 7 are enlarged sectional views showing an operation unit for operating the drive motor 111 to drive and stop. The drive motor 111 is configured to be energized and driven when the single electric switch 151 is turned on and stopped when the electric switch 151 is turned off. The on state of the electrical switch 151 corresponds to the “turn-on state” in the present invention, and the off state corresponds to the “non-turn-on state” in the present invention. The electric switch 151 is an automatic return type switch that is always urged to an OFF state by a spring (not shown) for convenience, and in the rear end region (region facing the hand grip 109) in the main body 103, a drive motor 111 is arranged in proximity to a controller 112 that controls 111. Then, an electrical signal indicating whether the electrical switch 151 is on or off is output to the controller 112, and the controller 112 controls driving / stopping of the drive motor 111 based on the electrical signal.

  Two switches 153 and 155 are provided to switch the electrical switch 111. One trigger-like first switch 153 is disposed on the handgrip 109 side, and the other second switch 155 is disposed on the main body 103 side. That is, the first switch 153 and the second switch 155 are disposed so as to be generally opposed to each other in the long axis direction of the hammer bit 119 (the long axis direction of the main body 103), that is, the front-rear direction. The first switch 153 corresponds to the “first switch operation member” in the present invention, and the second switch 155 corresponds to the “second switch operation member” in the present invention. The handgrip 109 extends in the vertical direction intersecting the long axis direction of the hammer bit, and is connected to the rear end of the main body 103 at the upper part and the lower part thereof.

  The first switch 153 is rotatable in the front-rear direction about the attachment shaft 154 with respect to the handgrip 109, and extends upward. The attachment shaft 154 corresponds to the “first axis” in the present invention. The first switch 153 rotates between an off position where the electrical switch 151 can be switched to an off state and an on position where the electrical switch 151 can be switched to an on state by a pulling operation by a finger of an operator. The moving operation is enabled, and the spring 156 is constantly biased from the on position to the off position. Therefore, the first switch 153 is held in an off position that protrudes forward from the front surface of the handgrip 109 when the pulling operation is not performed, and is substantially flush with the outer surface of the front surface of the grip when the pulling operation is performed. It becomes. The off position of the first switch 153 corresponds to the “initial position” in the present invention, and the on position corresponds to the “operation position” in the present invention. The spring 156 corresponds to the “biasing member” in the present invention.

  The first switch 153 is configured to be fixed at an on position by a slide plate 167 operated based on switching of the mode switching dial 165 to the first hammer mode. This will be described later. In other words, the first switch 153 is fixed at the on position by the operation mode (sometimes referred to as a trigger mode in the following description) in which the operator can freely operate the finger between the on position and the off position. Switchable operation mode (also referred to as a trigger lock-on mode in the following description).

  The second switch 155 is rotatable in the front-rear direction around an attachment shaft 157 for the main body 103 and extends downward. The attachment shaft 157 corresponds to the “second axis” in the present invention. The second switch 155 can be rotated by a finger between an off position where the electric switch 151 can be switched to an off state and an on position where the electric switch 151 can be switched to an on state. The The OFF position of the second switch 155 corresponds to the “first operation position” in the present invention, and the ON position corresponds to the “second operation position” in the present invention. The front surface of the second switch 155 is open. The outer surface area that is formed in a vertically long shape with a substantially U-shaped cross section and is pulled or pushed by the fingers of the second switch 155 is formed in a generally inverted L shape when viewed from the side, and the horizontal portion 155a is pulled. Is turned to the OFF position, and is turned to the ON position by pushing the vertical portion 155b.

  Further, the second switch 155 is formed with an arm portion 155c extending downward, and the distal end portion of the arm portion 155c is engaged with the leaf spring 158. The leaf spring 158 is formed with a semicircular arc-shaped engaging portion 158a, and the engaging portion 158a is operated when the second switch 155 is turned from the off position to the on position or from the on position to the off position. The second switch 155 is allowed to rotate by being elastically deformed by being pushed at the tip of the arm portion 155c. As a result, the second switch 155 is maintained at the position operated by the engaging portion 158a unless operated to the opposite side. The leaf spring 158 constitutes a position holding member that holds the second switch 155 in the operated position. The leaf spring 158 is disposed in the internal space of the lower connecting region 109 a that connects the lower portion of the main body 103 and the hand grip 109.

  A switch lever 159 for switching the electric switch 151 is attached to the second switch 155 so as to be rotatable in the front-rear direction about the attachment shaft 161. The switch lever 159 corresponds to the “operation member” in the present invention, and the mounting shaft 161 corresponds to the “third axis” in the present invention. The switch lever 159 extends in the vertical direction, and one end (upper end) of the switch lever 159 is connected to one end of the rod 163 so as to be relatively rotatable, and the other end (lower end) is connected to the rear end surface of the operation protrusion 151 a of the electric switch 151. Are opposed to each other. The rod 163 extends through the opening provided in the upper rear wall of the second switch 155 to the rear (handgrip 109 side), and the other end thereof is rotatable relative to the upper end portion of the first switch 153. It is connected. The rod 163 corresponds to a “bar-shaped member” in the present invention.

  A slide plate 167 as a switch fixing member that is slid linearly in the tool bit long axis direction (front-rear direction) by the rotation operation of the mode switching dial 165 is provided in the upper connection region 109 b that connects the main body 103 and the hand grip 109. Is arranged. The slide plate 167 rotates the first switch 153 to the ON position by moving backward, and fixes the ON position of the second switch 155, and releases the second switch 155 by moving forward. The switch 155 is turned to the on position and fixed to the on position, and the on position fixing of the first switch 153 is released. That is, the slide plate 167 functions as an operation mode switching member that switches the operation mode related to the first switch 153 and the second switch 155, and corresponds to the “operation mode switching unit” in the present invention.

  The mode switching dial 165 is provided with an eccentric shaft portion 165a at a position eccentric from the center of rotation by a predetermined amount. The slide plate 167 has a long hole 167a in a direction intersecting the long axis direction of the hammer bit with which the eccentric shaft portion 165a engages at one end side (front end side) in the moving direction, and the front and rear by rotation of the eccentric shaft portion 165a. It is moved in the front-rear direction by the direction component. That is, the slide plate 167 is moved backward (see FIG. 8) when the mode switching dial 165 is switched to the first hammer mode position (see FIG. 8), and the mode switching dial 165 is switched to the hammer drill mode position and the second hammer mode position. It is set to move forward (see FIG. 9) when operated.

  When the slide plate 167 moves rearward (rightward in FIGS. 4 to 7), the other end (rear end) of the slide plate 167 pushes the upper end locking portion 153 a of the first switch 153 backward. The first switch 153 is rotated to the on position and fixed at the on position. In this state, the second switch 155 is unlocked from the on position, and operation with a finger between the off position and the on position is allowed. The rear position of the slide plate 167 corresponds to the “first switching position” in the present invention. This state is shown in FIG. 4 and FIG. On the other hand, when the slide plate 167 moves forward, the cam portion 168 of the slide plate 167 pushes the protrusion 155d of the second switch 155 from above, thereby rotating the second switch 155 to the on position. Secure to. The front position of the slide plate 167 corresponds to the “second switching position” in the present invention. In this state, the first switch 153 is released from being fixed by the slide plate 167, and operation with a finger between the off position and the on position is allowed. This state is shown in FIG. 6 and FIG.

  The slide plate 167 extends rearward through the opening of the upper rear wall of the second switch 155, and as shown in the cross-sectional view of FIG. 3, the extended portion has a substantially hat-like cross-sectional shape. Is formed. In other words, edges that extend in the moving direction by a predetermined length are provided on both sides of the slide plate 167, and these edges pass between the upper and lower protrusions 155d and 155e formed on the inner surface of the upper rear wall of the second switch 155. The cam portion 168 is set. On the lower surface (cam surface) of the cam portion 168, a pressing region 168a that inclines in the moving direction for pressing the lower protrusion 155d of the second switch 155 from above with respect to the moving direction of the slide plate 167, and the protrusion 155d. A pressure maintaining region 168b parallel to the moving direction for continuing to maintain the pressure and a non-pressurizing region 168c that does not press the protrusion 155d are formed. A pressurizing maintenance region 168b is connected to the rear of the pressurizing region 168a, and a non-pressurizing region 168c is connected to the front. Therefore, when the slide plate 167 moves forward, the second switch 155 is turned on in the pressure maintaining region 168b after the lower protrusion 155d is pushed by the pressure region 168a and turned to the on position. Fixed in position. That is, the pressure maintaining area 168b is a fixed area for fixing the second switch 155 to the ON position. On the other hand, when the slide plate 167 moves forward, the lower protrusion 155d is opposed to the non-pressurized region 168c, so that the fixation is released, and the turning operation with the finger between the on position and the off position is allowed. . That is, the non-pressurization region 168c is a rotation operation permission region that allows the second switch 155 to rotate (see A in FIG. 10).

  On the upper surface of the cam portion 158, a projecting portion 168d for turning the second switch 155 to the off position is provided during the movement of the slide plate 167 from the rear to the front. The protrusion 168d rotates the second switch 155 to the OFF position by pushing up the protrusion 155e on the upper side of the second switch 155 when the ON position of the second switch 155 is released. (See B in FIG. 10). That is, the protrusion 168d and the pressurization region 168a constitute a position switching region for switching the position of the second switch 155 between the off position and the on position. The second switch 155 rotated to the off position is maintained at the off position as a result of the end of the arm portion 155c getting over the engaging portion 158a of the leaf spring 158 while elastically deforming. This state is shown in FIG.

  Next, the operation of the electric hammer drill 101 configured as described above will be described with a focus on switch operation. FIG. 8 shows a state in which the mode switching dial 165 is switched to the first hammer mode in which the hammer bit 119 performs the hammering operation. When the mode switching dial 165 is switched from the hammer drill mode shown in FIG. 9 or the first hammer mode to the first hammer mode, the slide plate 167 is moved backward. Then, the first switch 153 is pushed by the upper end locking portion 153a by the rear end portion of the slide plate 167, and is rotated and fixed to the on position. At this time, the lower protrusion 155d of the second switch 155 faces the non-pressurized region 168c via the pressurization maintaining region 168b and the pressurization region 168a of the cam portion 168 of the slide plate 167. Further, the second switch 155 is moved to the off position while the upper projection 155e is pushed by the projection 168d of the cam portion 168 during the backward movement of the slide plate 167. At this time, the switch lever 159 is placed at a position where the tip of the switch lever 159 is separated from the operation protrusion 151 a of the electric switch 151. The position of the switch lever 159 at this time corresponds to the “second operating position” in the present invention. This state is shown in FIG.

  In this state, when the vertical portion 155b of the second switch 155 is pushed forward with a finger, the second switch 155 is turned to the on position with the attachment shaft 157 as the rotation center, and the tip of the arm portion 155c. However, it is held in the ON position by getting over the engaging portion 158a of the leaf spring 158 while elastically deforming it. When the second switch 155 is turned to the ON position, the switch lever 159 (attachment shaft 161) attached to the second switch 155 also moves together with the second switch 155 (rotates about the attachment shaft 157 as the turning center). Move). At this time, the switch lever 159 connected to the first switch 153 via the rod 163 is rotated relative to the connection point between the first switch 153 and the rod 163, and the connection point between the rod 163 and the switch lever 159 is set. It moves with relative rotation about the center and relative rotation about the mounting shaft 161, and its tip pushes the operation protrusion 151 a of the electric switch 151 to switch it to the on state. That is, the switch lever 159 is moved to a position for switching the electric switch 151 to the ON state in conjunction with the turning operation of the second switch 155 to the ON position. The position of the switch lever 159 at this time corresponds to the “first operation position” in the present invention. This state is shown in FIG.

  When the electrical switch 151 is switched to the on state, the controller 112 drives the drive motor 111 to be energized based on the electrical signal (on signal) output from the electrical switch 151. In the hammer mode, since the clutch member 143 of the power transmission mechanism 141 is switched to the power cut-off state, the hammer bit 119 performs a hammer operation only by a striking operation. Then, the second switch 155 rotated to the on position is held at the on position by the engaging portion 158a of the leaf spring 158, and the on state of the electric switch 151 is fixed (maintained continuously) even if the finger is released from the second switch 155. Therefore, the operator can continuously perform the hammering operation by the hammering operation of the hammer bit 119 on the workpiece without continuing the switch operation. .

  Next, FIG. 9 shows a state in which the mode switching dial 165 is switched to the hammer drill mode in which the hammer bit 119 performs the hammer drill operation or the second hammer mode in which the hammer operation is performed. When the mode switching dial 165 is switched from the first hammer mode shown in FIG. 8 to the hammer drill mode or the second hammer mode, the slide plate 167 is moved forward. Then, the second switch 155 is turned on when the lower protrusion 155d is pushed by the pressurizing area 168a of the cam portion 168 and moved to the on position, and then is kept pressed by the pressurizing maintenance area 168b. Fixed in position. On the other hand, the first switch 153 is released from the pressing (fixing) of the upper end locking portion 153 a by the rear end of the slide plate 167 and returned to the off position by the urging force of the spring 156. At this time, the switch lever 169 is placed at a position where the tip of the switch lever 169 is separated from the operation protrusion 151 a of the electric switch 151. The position of the switch lever 159 at this time corresponds to the “second operating position” in the present invention. This state is shown in FIG.

  In this state, when the operator pulls the first switch 153 to the ON position against the urging force of the spring 156 with the fingers, the switch lever 159 rotates around the mounting shaft 161 via the rod 163, and the tip By pushing the operation protrusion 151a of the electric switch 151, the switch is turned on. The position of the switch lever 159 at this time corresponds to the “first operation position” in the present invention. This state is shown in FIG.

  When the electrical switch 151 is switched to the on state, the controller 112 drives the drive motor 111 to be energized based on the electrical signal (on signal) output from the electrical switch 151. At this time, if the mode is switched to the hammer drill mode, since the clutch member 143 of the power transmission mechanism 141 is switched to the power transmission state, the hammer bit 119 performs the hammer drill work by the striking operation and the rotation operation, If the mode is switched to the 2-hammer mode, the clutch member 143 of the power transmission mechanism 141 is switched to the power cut-off state, so the hammer bit 119 performs a hammer drill operation by a striking operation. When the pulling operation of the first switch 153 by the finger is released, the first switch 153 is returned to the off position by the urging force of the spring 156, and the switch lever 159 is also moved to a position where the electric switch 151 is turned off. Return. That is, in the hammer drill mode or the second hammer mode, the operator freely operates the first switch 153 between the on position and the off position, and freely operates or stops the hammer bit 119. In addition, hammer drill work or hammer work can be performed intermittently.

  According to this embodiment, when the first switch 153 and the second switch 155 are operated with respect to a single switch lever 159 that operates the electrical switch 151 while the other switch is operated with the one switch fixed. In conjunction with this operation, the switch lever 159 is connected so as to perform a predetermined operation, that is, an operation of switching the electric switch 151 between the on state and the off state. The first switch 153 is an automatic return type that returns to the initial position before the operation when the operating force is removed, and the second switch 155 is a position holding type that is held at the operated position. By adopting such a configuration, the operation mode (trigger lock on mode) in which the first switch 153 is fixed at the ON position where the electric switch 151 is turned on and the hammering operation is performed, the single electric switch 151 is changed. It was possible to realize it. For this reason, the number of wires connecting the electric switch 151 and the motor control controller 112 is reduced compared to the conventional type in which a trigger lock-on mechanism is configured by using a plurality of switches, and the handling thereof becomes easy. .

  In the present embodiment, the switch lever 159 is disposed on the main body 103 side, and is connected to the first switch 153 disposed on the handgrip 109 side by the rod 163, so that the electrical switch 151 is brought close to the controller 112. The wiring can be shortened because it can be arranged. As described above, since the number of wires is small and the wiring distance is short, when assembling the hammer drill by assembling various parts such as the drive mechanism of the drive motor 111 or the hammer bit 119 in the main body 103, the wires become an obstacle. Assembling property can be improved. In the present embodiment, since the first switch 153 and the second switch 155 are arranged to face each other, the operation with one hand is possible and the operation is easy.

In short, in the present embodiment, in the first hammer mode corresponding to the first drive mode in the present invention, the first switch 153 is fixed at the ON position, and in this state, the operation of the second switch 155 with a finger is allowed. Thus, the electrical switch 151 can be turned on and off.
On the other hand, in the hammer drill mode and the second hammer mode corresponding to the second drive mode in the present invention, the second switch 155 is fixed at the ON position, and in this state, the operation of the first switch 153 with fingers is allowed. 151 can be switched on and off.

(Second embodiment of the present invention)
Next, an electric hammer drill according to a second embodiment of the present invention will be described with reference to FIGS. The electric hammer drill according to the present embodiment is configured in the same manner as the electric hammer drill 101 described in the first embodiment except for the operation unit of the drive motor. Omitted.

  The first switch 253 is disposed on the handgrip 209 side, and is rotatable in the front-rear direction around the attachment shaft 254, and an electric switch 251 that can switch the electric switch 251 to an off state. Can be rotated between the ON position and the ON position where the can be switched to the ON state. The first switch 253 corresponds to the “initial position” in the present invention, and the on position corresponds to the “operating position” in the present invention. The first switch 253 is always biased from the on position to the off position by the spring 256. The second switch 255 is disposed on the main body 203 side, is rotatable in the front-rear direction about the attachment shaft 257, and is rotatable between the off position and the on position. The OFF position corresponds to the “first operation position” in the present invention, and the ON position corresponds to the “second operation position” in the present invention.

  The slide plate 267 has a long hole 267a on one end side (front end side) in the moving direction, in a direction crossing the long axis direction of the hammer bit with which the eccentric shaft portion 265a of the mode switching dial 265 is engaged, and the eccentric shaft portion 265a. It is moved linearly in the front-rear direction by the front-rear direction component by the rotation of the. That is, the slide plate 267 is moved backward (see FIG. 11) when the mode switching dial 265 is switched to the first hammer mode position (see FIG. 11), and the mode switching dial 265 is switched to the hammer drill mode position or the second hammer mode position. It is set to move forward (see FIG. 15) when operated. The rear position of the slide plate 267 corresponds to the “first switching position” in the present invention, and the front position corresponds to the “second switching position” in the present invention. The first switch 253 is fixed by rotating the upper end locking portion 253a at the rear end portion of the slide plate 267 moved rearward and turning it to the on position, and moving the slide plate 267 forward. Is configured to be released.

  On the other hand, the second switch 255 is provided with an arm portion 271 that extends toward the side surface portion 268 of the slide plate 267, and a roller 272 provided at the tip of the arm portion 271 is formed on the side surface portion 268 of the slide plate 267. It is engaged with a first cam groove 273 extending in the (front-rear direction). The first cam groove 273 includes a position switching region 273a for rotating the second switch 255 from the on position to the off position or from the off position to the on position during the movement of the slide plate 267 from the rear to the front or from the rear to the front. In the moving end where the slide plate 267 is moved backward, the rotation operation permission area 273b which allows the turning operation by the finger of the second switch 255, and in the moving end where the slide plate 267 is moved forward, And a fixing region 273c for fixing the switch 255 to the ON position.

  A positioning holding body 276 that holds the roller 272 by being elastically biased by the coil spring 275 is provided in the rotation operation allowable area 273b of the first cam groove 273. A protrusion 276a is formed on the engagement surface. When the second switch 255 is rotated between the off position and the on position, the roller 272 moves over the protrusion 276a while moving the holding body 276 backward against the urging force of the coil spring 275. Held in position. In other words, the holding body 276 constitutes a position holding member that holds the second switch 255 in the operated position unless operated to the opposite side.

  A switch lever 259 for switching the electric switch 251 between the on state and the off state is attached to the main body 203 and is rotatable in the front-rear direction around the attachment shaft 261. The switch lever 259 extends upward, and an intermediate portion in the extending direction is opposed to the operation projection 251a of the electric switch 251 so as to be in contact with or capable of contacting, and a tip (upper end) 259a is placed in an off position. 2 is opposed to the lower end portion 255c of the switch 255 with a predetermined gap in the front-rear direction. As for the gap, the lower end portion 277a of the linkage lever 277 enters between the front end 259a of the switch lever 259 and the lower end portion 255c of the second switch 255 so that it overlaps the front surface of the lower end portion 255c of the second switch 255. It is set to a size that allows this.

  On the main body 203 side, a linkage lever 277 is provided that is selectively linked to or disconnected from the first switch 253 and the second switch 255 while being always linked to the switch lever 259. The linkage lever 277 corresponds to the “linkage member” in the present invention. The linkage lever 277 is a rod-like member, and extends generally in the vertical direction, and is swingably attached to the main body 203 via a spherical bearing 278 at an intermediate portion in the extending direction. The lower end portion 277a of the linkage lever 277 is disposed so as to contact or approach the rear surface of the front end of the switch lever 259 from the rear, and the upper end portion 277b is first through an interlocking plate 279 disposed below the slide plate 267. The switch 253 is connected.

  At the front end of the interlocking plate 279, there is a substantially L-shaped long hole 281 having a vertically long region 281a extending in the moving direction (front-rear direction) of the slide plate 267 and a horizontally long region 281b extending in the left-right direction intersecting therewith The upper end portion 277 b of the linkage lever 277 is passed through the long hole 281. In other words, the interlocking plate 279 and the linkage lever 277 are coupled so as to be relatively movable in the front-rear direction and the left-right direction. As a result, when the slide plate 267 is moved rearward, the linkage lever 277 has the upper end portion 277b placed in the horizontally long region 281b of the elongated hole 281. In this state, the rotation of the first switch 253 is applied to the linkage lever 277. When the slide plate 267 is moved forward, the upper end portion 277b is placed in the vertically long region 281a of the elongated hole 281, and the rotation operation of the first switch 253 is not transmitted in this state. State (disconnected state). The interlocking plate 279 and the first switch 253 are connected so as to be rotatable relative to each other about an axis in the left-right direction.

  The upper end portion 277 b of the linkage lever 277 extends further upward through the long hole 281 of the interlocking plate 279 and is engaged with a second cam groove 274 formed in the slide plate 267. When the slide plate 267 moves in the front-rear direction, the second cam groove 274 causes the lower end portion 277a of the linkage lever 277 to swing from the lower end portion 255c of the second switch 255 by swinging the linkage lever 277 substantially in the left-right direction. It is formed in a shape that can enter or exit the front surface. As shown in FIG. 13, the second cam groove 274 has a predetermined direction relative to the moving direction of the slide plate 267 for allowing the lower end portion 277a of the linkage lever 277 to enter or leave the front surface of the lower end portion 255c of the second switch 255. It has a position switching area 274a that is inclined at an angle, an entry maintenance area 274b that maintains the entry state, and an escape maintenance area 27c that maintains the escape state. Accordingly, the linkage lever 277 is switched between a position where the lower end portion 277a enters the front surface of the lower end portion 255c of the second switch 255 and a position where it exits based on the forward or backward movement of the slide plate 267.

  When the slide plate 267 is moved forward, the linkage lever 277 is placed at an entry position. In this state, the linkage lever 277 is in a linkage state in which the turning operation of the second switch 255 to the ON position is transmitted to the linkage lever 277. When the slide plate 267 is moved rearward, the slide plate 267 is placed in a position to escape, and in this state, a non-linked state (disconnected state) in which the rotation operation of the second switch 255 to the on position is not transmitted. . Note that the upper end portion of the switch lever 259 has a length (width) in which the contact state is maintained even when the lower end portion 277a of the linkage lever 277 is placed at a position where it can escape. Thus, in the state where the linkage lever 277 is always linked to the switch lever 259, when the slide plate 267 moves rearward, the linkage lever 277 is not linked to the first switch 253, and is not linked to the second switch 255. Is swung to a position to be linked. This state corresponds to the “first linkage state” in the present invention. Further, when the slide plate 267 moves forward, the slide plate 267 is swayed to a position where the first switch 253 is linked and the second switch 255 is unlinked. This state corresponds to the “second linkage state” in the present invention.

Next, the switch operation of the second embodiment configured as described above will be described. FIG. 14 shows a state in which the mode switching dial 265 is switched to the first hammer mode so that the hammer bit performs the hammering operation. When the mode switching dial 265 is switched from the hammer drill mode or the second hammer mode shown in FIG. 18 to the first hammer mode, the slide plate 267 is moved backward. Then, the first switch 253 is pushed by the upper end locking portion 253a by the rear end portion of the slide plate 267, and is rotated and fixed to the on position. This state is shown in FIG.
On the other hand, the roller 272 of the arm portion 271 of the second switch 255 moves relative to the first cam groove 273 due to the backward movement of the slide plate 267, and is allowed to rotate from the fixed region 273c through the position switching region 273a. The region 273b is reached. Accordingly, the second switch 255 is rotated from the on position to the off position, and is held at the off position by the positioning holder 276. Thus, the turning operation of the second switch 255 with fingers is allowed. This state is shown in FIG.

At this time, the upper end portion 277b of the linkage lever 277 moves relative to the second cam groove 274 of the slide plate 267 and reaches the entry maintaining region 277b from the escape region 274c through the position switching region 274a (see FIG. 14). Thus, the linkage lever 277 swings rightward (upward in FIG. 14) with the spherical bearing 278 as a fulcrum, and its lower end 277a enters the front surface of the lower end 255c of the second switch 255. This state is shown in FIG.
Further, as shown in FIG. 14, the upper end portion 277 b of the linkage lever 277 relatively moves the laterally long region 281 b of the elongated hole 281 of the interlocking plate 279 when the relative region of the switching region 274 a of the second cam groove 274 moves. When relatively moving the entry maintaining area 274b of the cam groove 274, the vertically elongated area 281a of the long hole 281 is relatively moved to reach the front end. For this reason, the turning operation of the first switch 253 to the ON position is not transmitted to the linkage lever 277, and the linkage lever 277 is not swung in the front-rear direction. This state is shown in FIG.

  In this state, when the vertical portion 255b of the second switch 255 is pushed forward with a finger, the second switch 255 is turned to the on position with the attachment shaft 257 as the rotation center, and at the tip of the arm portion 271. The roller 272 moves over the protrusion 276a of the holding body 276 and is held in the on position. When the second switch 255 is turned to the ON position, the lower end portion 255c of the second switch 255 pushes the switch lever 259 forward via the lower end portion 277a of the linkage lever 277. As a result, the switch lever 259 rotates around the mounting shaft 261 and pushes the operation protrusion 251a of the electric switch 251 to switch it to the on state. This state is shown in FIG.

  The operation after the electrical switch 251 is switched to the on state is the same as in the first embodiment described above, and the hammering operation is performed only by the hammer bit striking operation. Since the second switch 255 that has been turned to the on position is held in the on position by the holding body 276, the on state of the electrical switch 251 is fixed (maintained) even if the finger is released from the second switch 255. Since the operation mode is set (that is, the trigger lock on mode), the operator can continuously perform the hammering operation by the hammering operation of the hammer bit 119 on the workpiece without continuing the switch operation.

  Next, when the mode switching dial 265 is switched from the first hammer mode shown in FIG. 14 to the hammer drill mode or the second hammer mode shown in FIG. 18, the slide plate 267 is moved forward. Then, the first switch 253 is released from the pressing (fixing) of the upper end locking portion 255 a by the rear end of the slide plate 267 and returned to the off position by the biasing force of the spring 256. At this time, the upper end portion 277b of the linkage lever 277 moves in the second cam groove 274 relatively from the entry maintaining area 274b to the escape area 274c through the position switching area 274a, so that it moves leftward (downward in FIG. 18). The lower end 277a of the second switch 255 escapes from the front surface of the lower end 255c. This state is shown in FIG. Further, when the first switch 255 returns to the off position, the linkage lever 277 has its upper end portion 277b relatively moved with respect to the long hole 281 of the interlocking plate 279 that moves forward together with the first switch 253. It extends from the vertically long region 281a to the horizontally long region 281b (see FIG. 18).

  On the other hand, as the slide plate 267 moves forward, the second switch 255 moves the roller 272 of the arm portion 271 in the first cam groove 273 from the rotation operation allowable area 273b to the fixed area 273c via the position switching area 273a. , And is rotated from the off position to the on position and fixed at the on position. At this time, the lower end portion 277a of the linkage lever 277 has escaped from the front surface of the lower end portion 255c of the second switch 255. For this reason, the switch lever 259 is not actuated. This state is shown in FIG.

  In this state, when the operator pulls the first switch 253 to the ON position against the urging force of the spring 256 with a finger, the switch lever 259 rotates around the mounting shaft 261 via the interlocking plate 279 and the linkage lever 277. And the operation protrusion 251a of the electric switch 251 is pushed to switch to the on state. This state is shown in FIG.

  The operation after the electrical switch 251 is switched on is the same as in the first embodiment described above. If the hammer drill mode is switched at this time, the hammer bit strike operation and the rotation operation are performed. If the hammer drill operation is performed and the second hammer mode is switched, the hammer drill operation by the hammer bit striking operation is performed. When the pulling operation of the first switch 253 by the finger is released, the first switch 253 is returned to the off position by the urging force of the spring 256, and the switch lever 259 is also moved to the position where the electric switch 251 is turned off. Return to. That is, in the hammer drill mode or the second hammer mode, the operator freely operates the first switch 253 between the on position and the off position, and arbitrarily drives or stops the hammer bit to perform hammer drill work or hammer work on the workpiece. Can be performed intermittently.

  As described above, according to the present embodiment, as in the case of the first embodiment described above, the first switch 253 is fixed at the ON position where the electric switch 251 is turned on to perform the hammering operation. The operation mode (trigger lock on mode) can be realized using a single electrical switch 251. For this reason, the number of wires connecting the electrical switch 251 and the controller for motor control is reduced as compared with the conventional type in which a trigger lock-on mechanism is configured using a plurality of switches, and the handling thereof becomes easy. In addition, the electrical switch 251 can be disposed close to the controller, and the wiring is shortened. As described above, since the number of wires is small and the wiring distance is short, when assembling the hammer drill by assembling various parts such as the drive motor or the drive mechanism of the hammer bit in the main body portion 203, the wiring does not get in the way and the assemblability is improved. Can be improved. In this embodiment, since the first switch 253 and the second switch 255 are arranged to face each other, the operation with one hand is possible and the operation is easy.

In short, in the present embodiment, as in the first embodiment, in the first hammer mode corresponding to the first drive mode in the present invention, the first switch 253 is fixed at the ON position. The operation of the two switches 255 with fingers is allowed, and the electric switch 251 can be turned on and off.
On the other hand, in the hammer drill mode and the second hammer mode corresponding to the second drive mode in the present invention, the second switch 255 is fixed at the ON position, and in this state, the operation of the first switch 253 with a finger is allowed. 251 can be switched on and off.

(Third embodiment of the present invention)
Next, an electric hammer drill according to a third embodiment of the present invention will be described with reference to FIGS. 19 and 20 show a state in which the first switch is fixed at the on position and the second switch is allowed to rotate (on position fixing is released), and FIGS. This shows a state in which the second switch is allowed to be turned (fixed to the on position) and is fixed at the on position. The electric hammer drill according to the present embodiment is applied to a type provided with a handgrip having an anti-vibration structure. Except for the anti-vibration structure and the operation unit of the drive motor, the first embodiment described above is applied. Since it is comprised similarly to the electric hammer drill demonstrated in the form, this is abbreviate | omitted about the illustration and description.

  As shown in FIGS. 19 to 22, the handgrip 309 having a vibration-proof structure in the present embodiment extends in the vertical direction intersecting the long axis direction of the hammer bit and is attached with a lower connecting region 309 b with respect to the main body 303. It is attached so as to be rotatable in the front-rear direction around the axis 311, and is connected in a resilient manner via a coil spring 313 in the upper connection region 309 b. The mounting shaft 311 corresponds to the “rotating shaft” in the present invention, and the coil spring 313 corresponds to the “elastic body” in the present invention.

  The first switch 353 is disposed on the handgrip 309 side and extends in the same direction as the direction in which the handgrip 309 extends, and rotates in the front-rear direction about the mounting shaft 354 in the intermediate portion in the extension direction. It is possible to rotate between an off position where the electric switch 351 can be switched to an off state and an on position where the electric switch 351 can be switched to an on state. The spring 356 always urges the on position to the off position. The off position corresponds to the “initial position” in the present invention, and the on position corresponds to the “operation position” in the present invention.

  The second switch 355 is disposed on the main body 303 so as to face the first switch 353 and extends in the same direction as the extending direction of the hand grip 309. The second switch 355 is rotatable in the front-rear direction around the mounting shaft 357 at the intermediate portion in the extending direction, and is in an off position where the electric switch 351 can be switched off, and the electric switch 351 is turned on. A rotation operation between the switchable ON positions is possible. The off position corresponds to the “first operation position” in the present invention, and the on position corresponds to the “second operation position” in the present invention.

  A connecting rod 383 extending in the hammer bit major axis direction (front-rear direction) is disposed in the internal space of the lower connecting region 309 a that connects the main body 303 and the hand grip 309. The connecting rod 383 corresponds to the “connecting member” in the present invention. The first switch 353 extends downward in the internal space of the handgrip 309, and its extended end is connected to one end of the connecting rod 383 so as to be relatively rotatable. A switch lever 359 that switches the electrical switch 351 between the off state and the on state extends in the vertical direction, and is disposed so that an intermediate portion in the extending direction is in contact with the operation protrusion 351a of the electrical switch 351. The extending direction lower end portion is connected to the other end of the connecting rod 383 so as to be relatively rotatable, and the extending direction upper end portion is connected to the lower end portion of the second switch 355 so as to be relatively rotatable.

  As described above, the first switch 353, the second switch 355, the connecting rod 383 and the switch lever 359 are used to fix the attachment shaft 354 of the first switch 353 and the attachment shaft 357 of the second switch 355 as fixed points. The mechanism is configured. When the second switch 355 is rotated between the OFF position and the ON position with the fingers while the first switch 353 is fixed at the ON position, the switch lever 359 supports the connection point 359b with the connection rod 383. Thus, the electric switch 351 is switched between the off state and the on state by being rotated forward or backward. On the other hand, when the first switch 353 is rotated between the off position and the on position with a finger while the second switch 355 is fixed at the on position, the switch lever 359 is connected to the second switch 355 at a connection point 359a. The electrical switch 351 is switched between an off state and an on state by being rotated forward or backward about the fulcrum.

  The slide plate 367 is engaged with the eccentric shaft portion 365a of the mode switching dial 365 through a long hole, and is moved linearly in the front-rear direction by a front-rear direction component due to the rotation of the eccentric shaft portion 365a. Thus, the slide plate 367 is moved forward when the mode switching dial 365 is switched to the first hammer mode position, and when the mode switching dial 365 is switched to the hammer drill mode position and the second hammer mode position. It is comprised so that it may move to back. When the slide plate 367 moves forward, the first switch 353 is fixed to the on position and the second switch 355 is released from being fixed, and when moved backward, the second switch 355 is fixed to the on position. A first lever 385 and a second lever 387 are provided to release the fixed on position of the first switch 353 and to switch the rotation fulcrum of the switch lever 359. The slide plate 367, the first lever 385, and the second lever 387 correspond to the “operation form switching unit” in the present invention, and the forward position of the slide plate 367 corresponds to the “first switch position” in the present invention. The rear position corresponds to the “second switching position” in the present invention.

  The first lever 385 extends in the vertical direction, and an intermediate portion in the extending direction is attached to the main body 303 and the second switch 355 so as to be rotatable relative to an attachment shaft 357 common to the second switch 355. At the same time, one end (upper end) is connected to the rear end of the slide plate 367 through a long hole so as to be relatively rotatable, and the other end (lower end) is relatively connected to one end of the second lever 387 through a vertical hole. It is pivotally connected. The second lever 387 extends in the vertical direction, and an intermediate portion in the extending direction is attached to the main body 303 so as to be rotatable in the front-rear direction with the mounting shaft 389 as a fulcrum, and a lower end portion 387 a is connected to the switch lever 359. The connecting point 359b with the rod 383 is placed so as to face the connecting point 359b from behind.

  Therefore, when the slide plate 367 is moved forward, the first lever 385 is rotated counterclockwise in the drawing with the mounting shaft 357 as a fulcrum, and accordingly, the second lever 387 is illustrated with the mounting shaft 389 as a fulcrum. The lower end portion 387a of the second lever 387 abuts on a connecting point 359b between the switch lever 359 and the connecting rod 383 to move it forward. As a result, the connecting rod 383 is moved forward, and the first switch 353 is rotated to the on position and fixed to the on position. At the same time, the second switch 355 together with the first lever 385 is rotated counterclockwise in the drawing to the off position side with the mounting shaft 361 as a fulcrum. When the first lever 385 is rotated, the second switch 355 is rotated to the off position while being integrated with the first lever 385 by a biasing force of a torsion spring 391 described later, and the on position fixing is released. Is done. At the same time, the connection point 359a of the switch lever 359 with the second switch 355 is moved backward by the rotation of the second switch 355. In other words, when the first switch 353 is fixed at the ON position, the switch lever 359 has a connection point 359a with respect to the second switch 355 and a connection rod 383 with respect to the vicinity of the contact point with the operation protrusion 351a of the electric switch 351. The connecting points 359b are displaced in the front-rear direction. In a state where the first switch 353 is fixed at the ON position, the pivot point of the switch lever 359 when the second switch 355 is pivotally operated by a finger is switched to the connection point 359b side with the connection rod 383. This state is shown in FIGS.

  On the other hand, when the slide plate 367 is moved backward, the second switch 355 is moved by the urging force of the torsion spring 391 when the first lever 385 rotates clockwise with the mounting shaft 357 as a fulcrum. In an integrated state with the first lever 385, it is turned to the ON position and fixed. As the second switch 355 rotates, the connection point 359a of the switch lever 359 with the second switch 355 moves forward. Further, the second lever 387 is rotated counterclockwise in the drawing with the mounting shaft 389 as a fulcrum through the first lever 385, and the lower end portion 387a of the second lever 387 is connected to the switch lever 359 and the connecting rod 383. The first switch 353 is released from being fixed at the ON position by moving away from the connection point 359b. When the first switch 353 released from the fixation is turned to the off position by the spring 356, the connection point 359b between the switch lever 359 and the connection rod 383 is moved backward. In the state where the second switch 355 is fixed at the ON position, the pivot point of the switch lever 359 when the first switch 353 is pivoted by the finger is switched to the connection point 359a side with the second switch 355. . This state is shown in FIGS.

  The first lever 385 regulates the turning range of the second switch 355 in the on direction and the off direction. That is, when the second switch 355 is turned to the off position by the finger, the turning of the second switch 355 is restricted by contacting the upper end side rear surface of the first lever 385, and the second switch 355 is When the turning operation is performed to the on position, the turning operation in the on direction is restricted by contacting the lower rear surface of the first lever 385. The first lever 385 and the second switch 355 are connected via a torsion spring 391 for holding the position. When the second switch 355 is rotated between the on position and the off position, the torsion spring 391 has an attachment point for the first lever 385 with respect to a straight line P connecting the attachment point for the second switch 355 and the attachment shaft 357. The direction of the urging force is reversed by reversing the position, that is, it functions as a reversing spring, thereby holding the second switch 355 in the on position or the off position. That is, the torsion spring 391 constitutes a position holding member that holds the second switch 355 in the operated position. FIG. 19 shows a state where the second switch 355 is held in the on position, and FIG. 20 shows a state where the second switch 355 is held in the off position.

In the third embodiment configured as described above, when the mode switching dial 365 is switched to the first hammer mode to cause the hammer bit to perform the hammering operation and the slide plate 267 is moved forward, As described above, the first switch 353 is fixed at the ON position, the ON position fixing of the second switch 355 is released, and the rotation fulcrum of the switch lever 359 is switched to the connection point 359b side with the connection rod 383. . This state is shown in FIG. 19 and FIG.
In this state, when the upper side of the vertical portion 355b of the second switch 355 is pushed forward with a finger, the second switch 355 moves to the on position with the mounting shaft 357 as the rotation center against the urging force of the torsion spring 391. And is held in the ON position by the inverted biasing force of the torsion spring 391. When the second switch 355 is turned to the on position, the switch lever 359 turns about the connection point 359b and pushes the operation protrusion 351a of the electric switch 351 to switch to the on state. This state is shown in FIG.

  The operation after the electrical switch 251 is switched to the on state is the same as in the first embodiment described above, and the hammering operation is performed only by the hammer bit striking operation. Since the second switch 355 that has been turned to the on position is held in the on position by the torsion spring 391, the on state of the electric switch 351 is fixed (maintained) even if the finger is released from the second switch 355. Since the operation mode is set (that is, the trigger lock on mode), the operator can continuously perform the hammering operation by the hammering operation of the hammer bit 119 on the workpiece without continuing the switch operation.

Next, when the mode switching dial 365 is switched from the first hammer mode to the hammer drill mode or the second hammer mode and the slide plate 367 is moved backward, as described above, the second switch 355 is turned on. In addition, the first switch 353 is released from the ON position, and the pivot point of the switch lever 359 is switched to the connection point 359a side with the second switch 355. This state is shown in FIG. 21 and FIG.
In this state, when the operator pulls the first switch 353 to the on position against the urging force of the spring 356 with fingers, the switch lever 359 rotates about the connection point 359a via the connection rod 383, The operation protrusion 351a of the electric switch 351 is pushed to switch to the on state. This state is shown in FIG.

  The operation after the electrical switch 351 is switched on is the same as in the first embodiment described above. If the hammer bit drive mode is switched to the hammer drill mode at this time, the hammer bit If the hammer drill operation is performed by the hammering operation and the rotation operation, and the mode is switched to the second hammer mode, the hammer drill operation by the hammer bit striking operation is performed. When the pulling operation of the first switch 353 by the finger is released, the first switch 353 is returned to the off position by the urging force of the spring 356, and the switch lever 359 is also moved to the position where the electric switch 351 is turned off. Return to. That is, in the hammer drill mode or the second hammer mode, the operator freely operates the first switch 353 between the on position and the off position, and freely drives or stops the hammer bit to form a workpiece. Hammer drilling or hammering can be performed intermittently.

In short, in the present embodiment, as in the first and second embodiments, in the first hammer mode corresponding to the first drive mode in the present invention, the first switch 353 is fixed at the ON position. In the state, the operation of the second switch 355 with fingers is allowed, and the electric switch 351 can be switched on and off.
On the other hand, in the hammer drill mode and the second hammer mode corresponding to the second drive mode in the present invention, the second switch 355 is fixed at the ON position, and in this state, the operation of the first switch 353 with the fingers is permitted. 351 can be switched on and off.

  As described above, according to the present embodiment, the first switch 353 is fixed at the on position where the electric switch 351 is turned on, as in the first embodiment or the second embodiment described above, and the hammer. An operation mode for performing work (trigger lock on mode) can be realized by using a single electric switch 351. Further, it is possible to obtain the effects of facilitating the wiring, shortening the wiring, and improving the assembling ability of the hammer drill.

  In particular, in the present embodiment, a connecting rod 383 is disposed in a lower connecting region 309 a that connects the main body 303 and the handgrip 309 on the lower side of the handgrip 309, and the first handgrip 309 side via the connecting rod 383 is arranged. 1 switch 353 and the switch lever 359 on the main body 303 side are connected to each other. Further, the rotation fulcrum of the switch lever 359 is switched to the connection point 359b with the connecting rod 359 in the first hammer mode, and the hammer drill mode is set. Since the second hammer mode is configured to switch to the connection point 359a with the second switch 355, it can be applied to a hammer drill having a handgrip 309 having an anti-vibration structure.

  In the above-described embodiment, the case where the second driving mode has the hammer drill mode and the second hammer mode has been described. However, the embodiment has a configuration having a drill mode in which the hammer bit performs a drilling operation only by a rotating operation. It doesn't matter.

It is sectional drawing which shows the whole structure of the electric hammer drill which concerns on 1st Embodiment. It is sectional drawing which shows the structure of the principal part of an electric hammer drill. It is sectional drawing based on the AA line of FIG. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state by which the 1st switch was fixed to the ON position, and the 2nd switch was operated to the OFF position. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state in which the 1st switch was fixed to the ON position, and the 2nd switch was operated to the ON position. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state by which the 2nd switch was fixed to the ON position, and the 1st switch was operated to the OFF position. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state by which the 2nd switch was fixed to the ON position, and the 1st switch was operated to the ON position. It is a top view which shows a mode switching dial and a slide plate, and shows the state switched to the 1st hammer mode. It is a top view which shows a mode switching dial and a slide plate, and shows the state switched to hammer drill mode or the 2nd hammer mode. It is a fragmentary figure explaining description of the 2nd switch by a cam part. It is sectional drawing which mainly shows the operation part of the drive motor which concerns on 2nd Embodiment, and shows the state in which the 1st switch was fixed to the ON position, and the 2nd switch was operated to the OFF position. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state in which the 1st switch was fixed to the ON position, and the 2nd switch was operated to the ON position. It is a B arrow view of FIG. It is a top view which shows a mode switching dial and a slide plate, and shows the state switched to the 1st hammer mode. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state by which the 2nd switch was fixed to the ON position, and the 1st switch was operated to the OFF position. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state by which the 2nd switch was fixed to the ON position, and the 1st switch was operated to the ON position. It is C arrow line view of FIG. It is a top view which shows a mode switching dial and a slide plate, and shows the state switched to hammer drill mode or the 2nd hammer mode. It is sectional drawing which mainly shows the operation part of the drive motor which concerns on 3rd Embodiment, and shows the state in which the 1st switch was fixed to the ON position, and the 2nd switch was operated to the OFF position. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state in which the 1st switch was fixed to the ON position, and the 2nd switch was operated to the ON position. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state by which the 2nd switch was fixed to the ON position, and the 1st switch was operated to the OFF position. It is sectional drawing which mainly shows the operation part of a drive motor, and shows the state by which the 2nd switch was fixed to the ON position, and the 1st switch was operated to the ON position.

Explanation of symbols

101 Electric hammer drill (blow tool)
103 Body (Tool body)
105 Motor housing 107 Gear housing 109 Hand grip 109a Lower connection area 109b Upper connection area 111 Drive motor 112 Controller 113 Motion conversion mechanism 115 Impact element 117 Tool holder 119 Hammer bit (tool bit)
121 crankshaft 123 crank arm 125 piston 127 cylinder 129 striker 131 impact bolt 133 intermediate gear 135 intermediate shaft 137 first bevel gear 139 second bevel gear 141 power transmission mechanism 143 clutch member 151 electric switch 151a operating projection 153 first switch (first switch Switch operation member)
153a Upper end locking portion 154 Mounting shaft (first axis)
155 Second switch (second switch operation member)
155a Horizontal portion 155b Vertical portion 155c Arm portion 155d Lower projection 155e Upper projection 156 Spring (biasing member)
157 Mounting shaft (second axis)
158 Leaf spring 158a Engaging portion 159 Switch lever (operation member)
161 Mounting shaft (third axis)
163 Rod 165 Mode switching dial (mode switching member)
165a Eccentric shaft part 167 Slide plate (operation mode switching part)
167a Long hole 168 Cam portion 168a Pressurized area 168b Pressurized maintenance area 168c Non-pressurized area 168d Projection 203 Main body (tool main body)
209 Hand grip 251 Electric switch 251a Operation protrusion 253 First switch (first switch operation member)
253a Upper end locking portion 254 Mounting shaft 255 Second switch (second switch operation member)
255a Horizontal portion 255b Vertical portion 255c Lower end portion 256 Spring 257 Mounting shaft 259 Switch lever (operation member)
259a Upper end portion 261 Mounting shaft 265 Mode switching dial (mode switching member)
265a Eccentric shaft part 267 Slide plate (operation mode switching part)
267a Long hole 268 Side surface portion 271 Arm portion 272 Roller 273 First cam groove 273a Position switching area 273b Rotation operation allowable area 273c Fixed area 274 Second cam groove 274a Position switching area 274b Entrance maintenance area 274c Escape area 275 Coil spring 276 Holding body 276a Protruding portion 277 Linking lever 277a Lower end portion 277b Upper end portion 278 Spherical bearing 279 Interlocking plate 281 Long hole 281a Vertically long region 281b Horizontally long region 303 Main body (tool main body)
309 Hand grip 311 Mounting shaft 313 Coil spring 351 Electric switch 351a Operation protrusion 353 First switch (first switch operation member)
354 Mounting shaft 355 Second switch (second switch operation member)
355b Vertical portion 356 Spring 357 Mounting shaft 359 Switch lever (operation member)
359a Connection point 359b Connection point 365 Mode switching dial (mode switching member)
365a Eccentric shaft part 367 Slide plate (operation mode switching part)
383 Connecting rod (connecting member)
385 1st lever (operation mode switching part)
387 2nd lever (operation mode switching part)
387a Lower end portion 389 Mounting shaft 391 Torsion spring

Claims (5)

A striking tool that performs a predetermined machining operation on a workpiece by a striking operation in the major axis direction of the tool bit and a rotational motion around the major axis direction,
A motor for driving the tool bit;
A single electrical switch capable of switching between an on state in which current is passed through the motor and a non-on state in which no current is passed;
A first switch operation member that can be moved by a finger between an initial position and an operation position separated from the initial position by a predetermined distance;
A biasing member that applies a biasing force to the first switch operating member to maintain the first switch operating member in the initial position;
A movement operation with a finger can be performed between the first operation position and the second operation position at a predetermined distance from the first operation position, and the first operation position and the second operation position are operated. A second switch operating member that is maintained in the operated position unless operated to the opposite side at each position,
Of the first drive mode for causing the tool bit to perform a machining operation only by a striking operation, the machining operation for the tool bit by a striking operation and a rotation operation, the machining operation by only the striking operation, and the machining operation by only the rotation operation A mode switching member that performs mode switching with a second drive mode that performs at least one of the following:
When the mode switching member is switched to the first drive mode side, the first switch operation member is fixed at the operation position and the second switch operation member is allowed to move. In this state, it is possible to switch between the on state and the non-on state of the electric switch by the finger operation of the second switch operation member,
When the mode switching member is switched to the second drive mode side, the second switch operation member is fixed at the second operation position, and the movement operation of the first switch operation member is allowed. The striking tool is placed in a state, and in this state, switching between the on state and the non-on state of the electric switch by a finger operation of the first switch operating member is possible. The impact tool according to claim 1,
Regarding the first and second switch operation members, the first switch operation member is moved to the operation position and fixed at the operation position, and the second operation position of the second switch operation member The first switching position for releasing the fixation in the state to allow the movement operation by the finger and the second switch operation member are moved to the second operation position and fixed to the second operation position. And by switching the mode of the mode switching member between a second switching position where the first switching operation member is released from being fixed at the operation position and switched to a state in which movement operation by a finger is allowed. An operation mode switching unit that is operated to switch the operation mode of the switch operation member;
An operating member that is movable between a first operating position that switches the electrical switch to the on state and a second operating position that switches the electrical switch to the non-on state;
The operating member is
In a state where the mode switching member is switched to the first drive mode side and the operation mode switching unit is moved to the first switching position, only the second switch operation member operated by a finger. Interlocked movement between the first operating position and the second operating position, thereby switching between the on and off states of the electrical switch,
In the state where the mode switching member is switched to the second drive mode side and the operation mode switching unit is moved to the second switching position, only the first switch operation member operated by a finger. It is configured to move between the first operating position and the second operating position in conjunction with each other, thereby switching between the on state and the non-on state of the electrical switch. Blow tool to do. The impact tool according to claim 2,
The first switch operating member is rotatable about a first axis in a direction intersecting the tool bit major axis direction, and the first switch operating member is rotated about the first axis to thereby adjust the initial position and the operation. It can be moved between positions,
The second switch operation member is rotatable about a second axis parallel to the first axis, and is rotated about the second axis so that the first operation position and the second switch operation member are rotated. Movable between the second operating positions,
The operating member is attached to the second switch operating member so as to be rotatable around a third axis parallel to the first axis.
Extending between the first switch operating member and the operating member, one end in the extending direction is connected to the first switch operating member so as to be relatively rotatable, and the other end in the extending direction is connected to the operating member. It has a rod-like member connected so as to be relatively rotatable,
The operating member is
In a state where the mode switching member is switched to the first drive mode side and the operation mode switching unit is moved to the first switching position, the second switch operation member is moved by the finger with the first switch mode. When the rotary operation is performed between the operation position and the second operation position, the electric switch is switched between an on state and a non-on state by moving with the second switch operation member. ,
In a state where the mode switching member is switched to the second driving mode side and the operation mode switching unit is moved to the second switching position, the first switch operating member is moved to the initial position by a finger. When operated between operating positions, the electric switch is turned on and off by rotating around the third axis in conjunction with the first switch operating member via the rod-shaped member. A striking tool characterized in that it is configured to switch between. The impact tool according to claim 2,
A first linked state in which the first switch operating member is not linked to the first switch operating member and is linked to the second switch operating member; There is further provided a linkage member that switches the linkage state between a second linkage state that is linked to the first switch operation member and is not linked to the second switch operation member. And
The linkage member is switched to the first linkage state by the operation mode switching unit operated to the first switching position when the mode switching member is switched to the first drive mode side, and the mode switching is performed. When the member is switched to the second drive mode side, the operation mode switching unit operated to the second switching position is configured to be switched to the second linkage state,
The operating member is
The mode switching member is switched to the first drive mode side, whereby the operation mode switching unit is moved to the first switching position, and the linkage member is switched to the first linkage state. Then, when the second switch operation member is moved between the first operation position and the second operation position by a finger, the second switch operation member is interlocked with the second switch operation member via the linkage member. Move between an operating position of 1 and a second operating position, thereby switching between the on and off states of the electrical switch;
The mode switching member is switched to the second drive mode side, whereby the operation mode switching unit is moved to the second switching position, and the linkage member is switched to the second linkage state. Then, when the first switch operation member is moved between the initial position and the operation position by a finger, the first operation position and the first operation position are interlocked with the first switch operation member via the linkage member. A striking tool which is configured to move between two operating positions and thereby switch between the on state and the non-on state of the electric switch. The impact tool according to claim 2,
The first switch operating member is disposed on the hand grip side and extends in the same direction as the extending direction of the hand grip, and intersects the long axis direction of the tool bit at an intermediate portion in the extending direction. A rotation operation between the initial position and the operation position is possible by being rotatably attached around a first axis of direction;
The second switch operating member is disposed on the tool body portion side and extends in the same direction as the extending direction of the hand grip, and is parallel to the first axis at the intermediate portion in the extending direction. It is attached so as to be rotatable about a second axis, and can be rotated between the first operation position and the second operation position.
The connecting portion between the tool body portion and the handgrip on one end side of the handgrip extends in a direction intersecting the first switch operating member extending direction, and the extending direction one end portion is A connecting member connected to one end of the extending direction of the first switch operating member so as to be relatively rotatable is disposed.
The operating member extends in the same direction as the extending direction of the second switch operating member and in a direction intersecting the extending direction of the connecting member, and one end portion in the extending direction of the connecting member The other end of the extending direction is connected to the other end in the extending direction, and the other end of the extending direction is connected to the one end of the second switch operating member in the relatively rotating direction.
The operating member is
In a state where the mode switching member is switched to the first driving mode side and the operation mode switching unit is moved to the first switching position, the second switch operation member is moved to the first operation by a finger. When the rotation operation is performed between the position and the second operation position, the connection member is rotated between the first operation position and the second operation position using the connection point with the connecting member as a rotation fulcrum, thereby Switch between the on and off states of the electrical switch,
In a state where the mode switching member is switched to the second driving mode side and the operation mode switching unit is moved to the second switching position, the first switch operation member is operated to the initial position by a finger. When operated between the first switch position and the second switch position, the switch is pivoted between the first operating position and the second operating position by using the connecting point with the second switch operating member as a rotation fulcrum. An impact tool characterized by being configured to switch between an input state and a non-input state.

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