JPH09290377A - Switch mechanism for power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide switch mechanism for a power tool excellent in operability, durability and safety without impairing appearance and moreover able to selectively provide the presence of mechanism for on-lock or the like. SOLUTION: In the off state of a switch trigger 4, a safety engaging part 61 of a rotating pawl 60 is engaged with a trigger engaging part 64 so that the switch trigger 4 cannot be gripped in. When a safety button is pressed in the direction of an arrow mark 95, the rotating pawl 60 is rotated in the direction of an arrow mark 91 through a safety pin 9 so as to release the engagement between the safety engaging part 61 and the trigger engaging part 64. The switch trigger 4 can thereby be gripped in. The safety button 5 is reset in the direction of an arrow mark 94 by a spring 11 and positioned on the same plane as the upper face 2M of a handle. When the safety button 5 is pushed again in the direction of the arrow mark 95 from the on state, a lock engaging part 62 of the rotating pawl 60 is engaged with a lock engaging part 65 so as to obtain an on-lock state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch mechanism for an electric power tool, and in particular, it has excellent operability, durability, and safety, does not impair the appearance, and has a mechanism such as an on-lock. The present invention relates to a switch mechanism for a power tool that can be provided in a specific manner.

[0002]

[Prior art]

[First Conventional Example] FIG. 15 shows a first conventional example of a switch mechanism of an electric power tool. FIG. 15 is a side sectional view showing the handle portion 2 of the electric power tool. A switch trigger 4 is provided on the lower surface of the handle portion 2. The switch trigger 4 is rotatable around the trigger shaft 4J in the directions of arrows 90 and 91. When the switch trigger 4 is grasped in the direction of arrow 90 and pushed down, the switch body 6 is turned on. The switch trigger 4 is biased by the spring 73 in the return direction indicated by the arrow 91.

A safety button 7 is provided on the upper surface of the handle portion 2.
0 is provided to prevent the switch from being turned on unexpectedly. That is, in a normal time, the switch trigger 4 is in a state where it cannot be pressed. The safety button 70 is rotatable about a button shaft 70J in the directions of arrows 94 and 95, and is biased by a spring 71 in the direction of arrow 94.

A pin 72 is connected to the safety button 70, and an engaging portion 74 is provided at the tip of the pin 72. Normally, switch trigger 4 is moved to arrow 90.
When trying to push in the direction, the trigger engaging portion 76 of the switch trigger 4 and the engaging portion 74 on the side of the safety button 70 come into contact with each other, and the pushing of the switch trigger 4 is blocked.

When the switch trigger 4 is pushed in the direction of arrow 90 to turn on the switch body 6, the safety button 70 is pushed in the direction of arrow 95. As a result, the engaging portion 74 provided on the pin 72 moves in the direction of the arrow 91 and does not come into contact with the trigger engaging portion 76 of the switch trigger 4. This causes the switch trigger 4 to move to the arrow 9
It can be rotated in the 0 direction.

When the switch trigger 4 is pushed in and the safety button 70 is further pushed in the direction of arrow 95, the on state can be forcibly maintained (on lock). When the safety button 70 is further pushed in the direction of the arrow 95, the lock engagement portion 75 provided on the switch trigger 4 and the recess formed in the engagement portion 74 on the safety button 70 side engage with each other, and the switch trigger 4 The ON state of is locked.

To release this on-lock, the switch trigger 4 is further grasped in the direction of arrow 90. As a result, the engagement between the lock engagement portion 75 and the recess of the engagement portion 74 is released, and the safety button 70 is returned by the bias of the spring 71.

[Second Conventional Example] Next, FIGS. 16, 17 and 18 show a second conventional example of a grinder.
FIG. 16 is an external perspective view of the grinder. Also, FIG.
7 shows an off state of the grinder, A is a side sectional view, and B is a sectional view taken along line XVIIB-XVIIB shown in A. FIG. 18 shows an on state of the grinder, where A is a side sectional view and B is a sectional view taken along line XVIIIB-XVIIIB shown in A.

As shown in FIG. 17A, the switch trigger 4 is provided with a safety button 32. The safety button 32 is composed of a button bar 32a and a stop portion 32b, and penetrates the button holes 4a and 4b formed in communication with the switch trigger 4. The button hole 4b is formed to be larger than the button hole 4a. In the off state shown in FIG. 17, the button hole 4b has a stopper 32b for the safety button 32.
Fits in. The safety button 32 is the spring 3
3 is urged in the direction of arrow 93.

Since the stopper 32b of the safety button 32 is fitted in the button hole 4b, the switch trigger 4 cannot be pushed in the direction of arrow 90 in the off state shown in FIG. To turn it on, the safety button 32
Is pressed in the direction of arrow 92 (FIG. 17B). As a result, the stopper portion 32b of the safety button 32 moves and is disengaged from the button hole 4b of the switch trigger 4.

As shown in the ON state in FIG. 18, the stopper portion 32b of the safety button 32 is disengaged from the button hole 4b of the switch trigger 4, so that the switch trigger 4
Can be pushed in the direction of arrow 90. In this case, the button bar 32a of the safety button 32 is the switch trigger 4
Is located in the small button hole 4a. Thus, the rotary whetstone 31 can be rotated while the switch trigger 4 is being gripped.

When switching from the ON state to the OFF state, the grip of the switch trigger 4 is released and the push is released.
As a result, the switch trigger 4 returns in the direction of arrow 91, and the safety button 32 also returns in the direction of arrow 93 by the spring 33.

[0013]

First, in the first conventional example shown in FIG. 15, when the switch trigger 4 is gripped in the direction of arrow 90 and in the ON state, the rear surface 74 of the engaging portion 74 is formed.
M is in contact with the inner surface 77 of the trigger 4 engaging portion 76,
The safety button 70 does not return in the direction of arrow 94. Even in the on-lock state, since the lock engaging portion provided on the switch trigger 4 and the concave portion formed on the engaging portion 74 on the safety button 70 side are engaged, the safety button 70 has an arrow 94. Does not return in the direction.

That is, during the ON state and the ON lock state, the safety button 70 continues to be recessed from the upper surface of the handle portion 2. Then, cutting powder and the like generated during the work may be accumulated in the recessed portion of the upper surface of the handle portion 2. If the cutting powder or the like accumulates in the safety button 70 portion, the cutting powder or the like may be clogged, and the safety button 70 may not operate properly, which causes a problem that the operability is deteriorated.

Further, there is a possibility that cutting powder or the like collected in the safety button 70 may enter the handle portion 2 and cause a failure, thereby deteriorating the durability of the electric tool. Furthermore, when the safety button 70 returns in the direction of arrow 94, there is a risk that a finger or the like may be caught in the recessed portion of the safety button 70. In addition, since the safety button 70 remains recessed from the upper surface of the handle portion 2 during the ON state and the ON lock state, there is also a problem of impairing the appearance.

Also in the second conventional example shown in FIGS. 16, 17 and 18, the safety button 32 is turned on during the ON state.
Is in a state of being recessed in the direction of arrow 92, and there is a problem that the appearance is impaired.

Further, as shown in FIG. 18, when the switch trigger 4 is pushed into the ON state, the switch trigger 4 is pressed in the direction of arrow 93 by the stopper portion 32b of the safety button 32 (FIG. 18B). For this reason, when the switch trigger 4 is released from the on state to the off state, the switch trigger 4 that is about to return in the direction of arrow 91 (FIG. 18A) is stopped by the stop portion 32b from the side surface in the direction of arrow 93 (FIG. 18B). ), It may not return smoothly. Therefore, there is a problem that the operability is poor.

Further, in order to provide the on-lock mechanism in the second conventional example, it is necessary to design different products. That is, there is a problem that the presence or absence of another mechanism such as on-lock cannot be selectively provided for the same electric power tool product.

Therefore, the present invention is excellent in operability, durability, and safety, does not impair the appearance, and can be selectively provided with or without a mechanism such as an on-lock. The purpose is to provide a mechanism.

[0020]

According to a first aspect of the present invention, there is provided a switch mechanism for an electric power tool, which is provided in a handle portion of the electric power tool, and an operation switch which can be switched to an off position or an on position, and a handle portion of the electric power tool. And an operation portion having an operation surface for receiving a pressing force, wherein the operation surface is located substantially on the same plane as the handle surface of the handle portion,
Alternatively, an operating part is provided, which is operated by being pressed to switch the operating surface from the surface of the handle to a recessed position toward the inside of the handle, and a biasing part for constantly biasing the operating part toward the prohibited position. In the switch mechanism of the electric tool, the operating portion is in the allowable position only when being pressed against the operating surface, and when the pressing is released, the operating portion is biased by the biasing portion and is in the allowable position. From the OFF position to the ON position when the operating part is in the prohibited position, and the operating switch cannot be switched from the OFF position to the ON position when the operating part is in the allowed position. It is characterized by

A switch mechanism for an electric power tool according to a second aspect of the present invention is provided in a handle portion of an electric power tool, an operation switch that can be switched to an off position or an on position, and a handle portion of an electric power tool, and presses it. An operation portion having an operation surface to be received, wherein the operation surface is located substantially on the same plane as the handle surface of the handle portion, and the operation surface is pressed from the handle portion surface to the inside of the handle portion. The operating surface can be switched from the permissible position to the on-lock position, which is further recessed toward the inside of the handle by pressing. A biasing portion that urges, and a rotation member that can be switched to a prohibited position, a permissible position, or an on-lock position by rotating around a rotation center axis, and a prohibited position of the operation portion. A switch mechanism for an electric tool, comprising: a rotating member that is switched in response to a switching operation of an allowable position or an on-lock position, wherein the operating portion is the allowable position or the on-lock position only when being pressed against the operation surface. When the pressing is released, the operating portion is biased by the biasing portion, independently returns from the allowable position or the on-lock position to the prohibited position, and the rotating member is at the prohibited position. When the actuating switch located in the off position is directly or indirectly engaged with the actuating switch from the off position to the on position, the turning member is disengaged from the actuating switch when in the allow position. The actuating switch can be switched from the off position to the on position, and when the turning member is in the on-lock position, the rotating member directly contacts the actuating switch located in the on position. The non switched off position the actuating switch from ON position engages indirectly is characterized in that.

A switch mechanism for an electric power tool according to a third aspect of the present invention is provided on a handle portion of an electric power tool, an operation switch that can be switched to an off position or an on position, and a handle portion of an electric power tool. An operation portion having an operation surface to be received, wherein the operation surface is located substantially on the same plane as the handle surface of the handle portion, and the operation surface is pressed from the handle portion surface to the inside of the handle portion. The operating surface can be switched from the permissible position to the on-lock position, which is further recessed toward the inside of the handle by pressing. A biasing portion that urges, an auxiliary member that can be switched to a prohibited position, an allowable position, or an on-lock position by rotating around the central axis of the auxiliary member, and prohibits the operation portion. Location, permitting position or on the locking position the auxiliary member to be switched in response to switching operation of,
A lock member that is switched to a non-lock position or an on-lock position by rotating around a lock member central axis, the lock member being in a non-lock position when the auxiliary member is in a prohibited position and an allowable position, and A switch mechanism for an electric tool, comprising: a lock member that is rotated by being switched from an allowable position to an on-lock position and switched from an unlocked position to an on-lock position. Is in the allowable position or the on-lock position, and when the pressure is released, the operating part is biased by the biasing part and independently returns from the allowable position or the on-lock position to the prohibited position to assist. When the member is in the prohibited position, it cannot directly or indirectly engage the operation switch to switch the operation switch from the off position to the on position. When the auxiliary member is in the allowable position, the auxiliary switch is disengaged from the operating switch and can switch the operating switch from the off position to the on position, and the locking member, when in the on-lock position, directly or indirectly. When the lock member is in the unlocked position, the lock member is disengaged from the operating switch to disengage the operating switch from the on position. It is characterized in that it can be switched to the off position.

A switch mechanism for a power tool according to a fourth aspect is the switch mechanism for a power tool according to the second or third aspect, wherein the operation switch is rotated along a predetermined rotation plane. Switched to an off position or an on position, the rotating member or the auxiliary member,
It is characterized by rotating along a plane substantially the same as the plane of rotation.

According to a fifth aspect of the present invention, there is provided a switch mechanism for an electric power tool, which is provided in a handle portion of the electric power tool, an operation switch which can be switched between an off position and an on position, and a handle portion of the electric power tool. An operating portion having an operation surface for receiving, wherein the operation surface is substantially in the same plane as the handle surface of the handle portion, or the operation surface is pushed from the handle portion surface by being pressed. The operating part that can be switched to the on-lock position that is recessed inward, the biasing part that constantly biases the operating part toward the unlocked position, and the unlocking position by rotating around the center axis of the intermediate member. An intermediate member that can be switched to the on-lock position, the intermediate member that is rotated and switched according to the switching operation of the unlocking position or the on-lock position of the operation unit, the lock member. A lock member that is switched to a non-lock position or an on-lock position by rotating about a member central axis, and the lock member that is switched corresponding to a switching operation of the non-lock position or the on-lock position of the intermediate member, In the switch mechanism of the electric power tool provided, the operating portion is in the on-lock position only when being pressed against the operating surface, and when the pressing is released, the operating portion is biased by the biasing portion, Independently returning from the on-lock position to the unlocked position, the lock member, when in the on-lock position, directly or indirectly engages the actuation switch to disable the actuation switch from the on-position to the off-position, The locking member, when in the unlocked position, disengages the actuation switch and switches the actuation switch from the on position to the off position. Possible to be,
It is characterized by:

According to a sixth aspect of the present invention, there is provided a switch mechanism for an electric power tool, which is provided in a handle portion of the electric power tool, an operation switch which can be switched to an off position or an on position, and a handle portion of the electric power tool. An operation portion having an operation surface to be received, wherein the operation surface is substantially on the same plane as the handle portion surface of the handle portion, or the operation surface is pushed from the handle portion surface to An operating part that can be switched to an allowable position that is recessed inward, a biasing part that constantly biases the operating part toward the prohibited position,
An electric member provided with an auxiliary member that can be switched to a prohibited position or an allowable position by rotating around the auxiliary member central axis, and that can be switched in accordance with the operation of switching the prohibited position or the allowable position of the operating portion. The switch mechanism of the tool, where the operating part is in the allowable position only when it is pressed against the operating surface, and when the pressing is released, the operating part is biased by the biasing part and independently allowed. When the auxiliary member returns from the position to the prohibited position and the auxiliary member is in the prohibited position, it directly or indirectly engages the operation switch to disable the operation switch from the off position to the on position, and the auxiliary member moves to the allowed position. At a certain time, the engagement with the operation switch is released, and the operation switch can be switched from the off position to the on position.

A switch mechanism for an electric power tool according to a seventh aspect is the switch mechanism for an electric power tool according to the fourth aspect,
By exchanging the auxiliary member with the intermediate member shown in claim 5, the switch mechanism of the electric tool according to claim 5 can be obtained, or by removing the lock member, the electric tool according to claim 6. It is possible to use a switch mechanism of.

[0027]

In the switch mechanism of the electric power tool according to the first aspect of the present invention, the operating portion is in the allowable position only when it is pressed against the operation surface, and when the pressing is released,
The operation unit is biased by the biasing unit and returns from the allowed position to the prohibited position.

That is, when the operation surface of the operation portion is not pressed, the operation surface of the operation portion is always located substantially on the same plane as the surface of the handle portion, and is kept recessed from the surface of the handle portion. Will never last in. Therefore, there is no possibility that cutting powder or the like will collect in the recessed portion, and there is no fear that cutting powder or the like will hinder the smooth return of the operating unit to the prohibited position, and to obtain a switch mechanism for an electric tool with excellent operability. You can

Further, since the cutting powder or the like does not collect in the recessed portion, no failure is caused by the penetration of the cutting powder or the like, and the switch mechanism of the electric tool having excellent durability can be obtained. Furthermore, since the operating portion does not continue to be recessed from the surface of the handle portion, a finger or the like is not caught in the recessed portion, and a switch mechanism for an electric tool having excellent safety can be obtained. . Further, when the pressing of the operation portion on the operation surface is released, the allowable position is returned to the prohibited position, so that the appearance of the power tool is not damaged.

In the switch mechanism of the electric tool according to the second aspect, the operating portion is in the allowable position or the on-lock position only when the operating surface is pressed, and when the pressing is released, the operating portion is attached. Being biased by the members,
Independently returns from the allowed position or the on-lock position to the prohibited position.

That is, when the operating surface of the operating portion is not pressed, the operating surface of the operating portion is always located substantially on the same plane as the surface of the handle portion, and is kept recessed from the surface of the handle portion. Will never last in. Therefore, there is no possibility that cutting powder or the like will collect in the recessed portion, and there is no fear that cutting powder or the like will hinder the smooth return of the operating unit to the prohibited position, and to obtain a switch mechanism for an electric tool with excellent operability. You can

Further, since the cutting powder and the like are not accumulated in the recessed portion, no failure is caused by the intrusion of the cutting powder and the like, and the switch mechanism of the electric tool having excellent durability can be obtained. Furthermore, since the operating portion does not continue to be recessed from the surface of the handle portion, a finger or the like is not caught in the recessed portion, and a switch mechanism for an electric tool having excellent safety can be obtained. . Further, when the pressing of the operation portion on the operation surface is released, the allowable position is returned to the prohibited position, so that the appearance of the power tool is not damaged.

Further, when the rotating member is in the prohibited position,
When the operation switch located in the off position is engaged directly or indirectly to disable the operation switch from the off position to the on position, and when the rotating member is in the on lock position, the operation switch located in the on position is The actuation switch cannot be switched from the on position to the off position by directly or indirectly engaging.

As described above, by using the single rotating member, it is possible to prevent the operation switch from being switched to the ON position and to maintain the ON position of the operation switch. Therefore, the number of parts can be reduced and the configuration can be simplified.

In the switch mechanism of the electric tool according to the third aspect, the operating portion is in the allowable position or the on-lock position only when the operating surface is pressed, and the operating portion is attached when the pressing is released. Being biased by the members,
Independently returns from the allowed position or the on-lock position to the prohibited position.

That is, when the operation surface of the operation portion is not pressed, the operation surface of the operation portion is always located substantially on the same plane as the surface of the handle portion, and is kept recessed from the surface of the handle portion. Will never last in. Therefore, there is no possibility that cutting powder or the like will collect in the recessed portion, and there is no fear that cutting powder or the like will hinder the smooth return of the operating unit to the prohibited position, and to obtain a switch mechanism for an electric tool with excellent operability. You can

Further, since the cutting powder or the like does not collect in the recessed portion, the cutting powder or the like does not cause a failure, and the switch mechanism of the electric tool having excellent durability can be obtained. Furthermore, since the operating portion does not continue to be recessed from the surface of the handle portion, a finger or the like is not caught in the recessed portion, and a switch mechanism for an electric tool having excellent safety can be obtained. . Further, when the pressing of the operation portion with respect to the operation surface is released, the allowable position or the on-lock position is returned to the prohibited position, so that the appearance of the power tool is not damaged.

In the switch mechanism of the electric tool according to the fourth aspect, the operation switch is switched to the off position or the on position by rotating along the predetermined rotating plane. Then, the rotation member or the auxiliary member rotates along a plane substantially the same as the rotation plane.

Therefore, the plane on which the rotating member or the auxiliary member rotates does not intersect with the plane on which the operation switch rotates. Therefore, the smoothness of the rotating operation of the operation switch is not hindered by the rotation of the rotating member or the auxiliary member, and the switch mechanism of the electric tool having excellent operability can be obtained.

In the switch mechanism of the electric tool according to the present invention, the operating portion is in the on-lock position only when it is pressed against the operating surface, and when the pressing is released, the operating portion is operated by the biasing portion. It is biased and independently returns from the on-lock position to the unlocked position.

That is, when the operating surface of the operating portion is not pressed, the operating surface of the operating portion is always located substantially on the same plane as the surface of the handle portion, and is kept recessed from the surface of the handle portion. Will never last in. Therefore, cutting powder or the like does not collect in the recessed portion, and there is no fear that the cutting powder or the like will hinder the smooth return of the operating portion to the unlocked position, and a switch mechanism for an electric tool having excellent operability is obtained. be able to.

Further, since the cutting powder or the like does not collect in the recessed portion, no failure is caused by the intrusion of the cutting powder or the like, and the switch mechanism of the electric tool having excellent durability can be obtained. Furthermore, since the operating portion does not continue to be recessed from the surface of the handle portion, a finger or the like is not caught in the recessed portion, and a switch mechanism for an electric tool having excellent safety can be obtained. . Further, when the pressing of the operation portion with respect to the operation surface is released, the lock position returns to the unlocked position, so that the appearance of the power tool is not damaged.

In the switch mechanism of the electric tool according to the sixth aspect, the operating portion is in the allowable position only when being pressed against the operating surface, and when the pressing is released, the operating portion is biased by the biasing portion. It receives the force and independently returns from the allowed position to the prohibited position.

That is, when the operation surface of the operation portion is not pressed, the operation surface of the operation portion is always located substantially on the same plane as the surface of the handle portion, and is kept depressed from the surface of the handle portion. Will never last in. Therefore, there is no possibility that cutting powder or the like will collect in the recessed portion, and there is no fear that cutting powder or the like will hinder the smooth return of the operating unit to the prohibited position, and to obtain a switch mechanism for an electric tool with excellent operability. You can

Further, since cutting powder or the like is not accumulated in the recessed portion, no failure is caused by the intrusion of the cutting powder or the like, and a switch mechanism for an electric tool having excellent durability can be obtained. Furthermore, since the operating portion does not continue to be recessed from the surface of the handle portion, a finger or the like is not caught in the recessed portion, and a switch mechanism for an electric tool having excellent safety can be obtained. . Further, when the pressing of the operation portion on the operation surface is released, the allowable position is returned to the prohibited position, so that the appearance of the power tool is not damaged.

In the power tool switch mechanism according to the seventh aspect, the switch mechanism of the power tool according to the fifth aspect can be obtained by replacing the auxiliary member with the intermediate member according to the fifth aspect. Further, by removing the lock member, the switch mechanism of the electric tool according to the sixth aspect can be obtained. Therefore, it is possible to obtain a switch mechanism for another type of electric tool simply by exchanging and removing parts without designing different products. That is, the presence or absence of a mechanism such as on-lock can be selectively provided.

[0047]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of a switch mechanism for an electric power tool according to the present invention will be described by taking a grinder as an example. FIG. 1 is a perspective view of the entire grinder according to this embodiment. A motor is provided in the main body 30, and the rotary grindstone 31 attached to the tip of the motor rotates by the drive of the motor.

A handle portion (handle portion) 2 is connected to the rear portion of the main body portion 30. A switch trigger (actuation switch) 4 is provided on the lower surface of the handle portion 2. When the switch trigger 4 is gripped and pushed in, the switch is turned on and the motor is driven to rotate the rotary whetstone 31.

A safety button (operation section) 5 is provided on the handle upper surface (handle surface) 2M of the handle section 2 to prevent the switch from being turned on accidentally. That is, in a normal state, the switch trigger 4 is in a state where it cannot be pushed, and the switch trigger 4 can be pushed by pushing the safety button 5 to release the safety function.

In the normal state, the surface (operation surface) of the safety button 5 is located substantially on the same plane as the handle upper surface 2M. When the surface of the safety button 5 is pushed down and the switch trigger 4 is pushed in, it is turned on, and the rotary grindstone 31 rotates. The safety button 5 returns immediately when the depression is released. The safety button 5
A protrusion 5T is formed on the surface of the so as to prevent it from slipping when pressed.

When the switch trigger 4 is released from the on state, the state returns to the off state and the rotation of the rotary grindstone 31 is stopped. On the other hand, if the safety button 5 is pressed and the switch trigger 4 is pressed to turn it on, and then the safety button 5 is pressed further, the on-lock state is set.

That is, thereafter, even if the switch trigger 4 is released, the ON state is maintained and the rotary grindstone 31 continues to rotate. Even in this case, when the safety button 5 is released, the safety button 5 immediately returns. To release the on-lock state, squeeze the switch trigger 4 again and push it further in. As a result, the switch trigger 4 is returned to the off state, and the rotation of the rotary grindstone 31 is stopped.

A specific configuration of the present embodiment for performing the above operation will be described with reference to FIGS. 2 to 7. 2 to 7 are side sectional views of the handle portion 2. 2 and 3 are off, FIG. 4 is on, and FIG.
6 shows the on-lock state, and FIG. 7 shows the state when the on-lock state is released.

The switch trigger 4 is held by the handle portion 2 so as to be rotatable about the trigger shaft 4J in the directions of arrows 90 and 91, and is constantly urged in the direction of arrow 91.
A trigger engaging portion 64 is formed at the tip of the switch trigger 4. A lock engagement portion 65 is also provided in the switch trigger 4. A switch body 6 is provided in the handle portion 2 and is turned on when the switch trigger 4 is turned in the direction of arrow 90, and the body portion 30 is turned on.
The motor in (FIG. 1) is driven to rotate the rotary grindstone 31.

On the other hand, the safety button 5 is rotatable in the directions of arrows 94 and 95 about the safety button shaft 5J. One end of a safety pin 9 is in contact with the inside of the tip of the safety button 5. The safety pin 9 is constantly urged by a spring (biasing portion) 11 in the direction of arrow 101, that is, in the direction of pushing up the safety button 5 in the direction of arrow 94 and returning it.

The other end of the safety pin 9 is in contact with a rotating claw (rotating member) 60. The rotating claw 60 is rotatable about a rotating claw shaft (rotating center shaft) 60J in the directions of arrows 90 and 91, and is biased in the direction of arrow 90 by a coil spring 63. The rotary claw 60 has a safety engaging portion 6
1 and the lock engaging portion 62 are integrally provided.

In the OFF state shown in FIG. 2, the rotating claw 6
0 receives the bias of the coil spring 63, and the safety pin 9
It has rotated in the direction of arrow 90 to the position where it comes into contact with. FIG. 3 shows a state in which the switch trigger 4 is pushed in the direction of arrow 90 in this state. As shown in FIG. 3, the safety engagement portion 61 of the rotation claw 60 is located on the trajectory of the rotation of the trigger engagement portion 64 of the switch trigger 4 in the direction of arrow 90.

Therefore, the trigger engaging portion 64 of the switch trigger 4 is engaged with the safety engaging portion 61 of the rotating claw 60, and the switch trigger 4 cannot be further rotated in the direction of arrow 90. This prevents the switch from being turned on unexpectedly. Although the safety engagement portion 61 is directly engaged with the trigger engagement portion 64 in this embodiment, it may be indirectly engaged with the trigger engagement portion 64, for example, via another member.

In the off state shown in FIGS. 2 and 3, the safety button 5 is biased by the spring 11 via the safety pin 9 and is rotated to the limit position in the direction of arrow 94. That is, as shown in FIGS. 2 and 3,
The surface of the safety button 5 is not in a state of being recessed from the handle upper surface 2M, but is substantially flush with the handle upper surface 2M.

When the motor is driven to start the rotation of the rotary grindstone 31, the safety button 5 is pressed in the direction of arrow 95. When the safety button 5 is pressed, the safety pin 9 moves in the direction of arrow 100 as shown in FIG.
The rotating claw 60 is pressed. As a result, the rotating claw 60 rotates in the direction of arrow 91 against the bias of the coil spring 63.

As the rotating claw 60 rotates in the direction of arrow 91, the safety engaging portion 61 of the rotating claw 60 moves on the orbit of rotation of the trigger engaging portion 64 of the switch trigger 4 in the direction of arrow 90. Move away from. Therefore, the safety engagement portion 61 and the trigger engagement portion 64 are disengaged, and the switch trigger 4 can be pushed in the direction of arrow 90 as shown in FIG.

In the state of FIG. 4 in which the switch trigger 4 is pushed in, the safety engaging portion 61 of the rotating claw 60 is
The rotating claw 60 cannot return to the position shown in FIGS. 2 and 3 because it is in contact with the trigger engaging portion 64 of the switch trigger 4. However, the safety pin 9 has a spring 1
Since it is biased by 1, it returns in the direction of arrow 101 independently of the rotating claw 60.

Therefore, the safety button 5 returns in the direction of arrow 94 at the same time when the depression of the safety button 5 is released. As a result, the surface of the safety button 5 is located substantially on the same plane as the handle upper surface 2M, and the safety button 5 does not remain recessed in the direction of arrow 95.

When the switch trigger 4 is pushed in, the switch body 6 is turned on as described above, the motor is driven, and the rotary grindstone 31 starts to rotate. When the switch trigger 4 is released from the on state shown in FIG. 4, the switch trigger 4 returns in the direction of arrow 91. With the return of the switch trigger 4, the rotary claw 60 also returns in the direction of arrow 90.

Here, the trigger shaft 4J of the switch trigger 4 and the rotary claw shaft 60J of the rotary claw 60 are located substantially parallel to each other. For this reason, the switch trigger 4 is moved to the arrow 9
The rotation claw 60 rotates in the directions of arrows 90 and 91 along substantially the same plane as the plane (rotation plane) that rotates in the directions 0 and 91.

As described above, since the plane on which the rotary claw 60 rotates does not intersect with the plane on which the switch trigger 4 rotates, the switching operation of the rotary claw 60 in the direction of arrow 90 causes the switch to move. The smoothness of the returning operation of the trigger 4 in the direction of the arrow 91 is not hindered, and the switch mechanism of the electric tool having excellent operability can be obtained.

When the safety button 5 is pressed again from the ON state shown in FIG. 4, the ON lock state shown in FIGS. 5 and 6 can be obtained. In this case, the safety button 5 is pressed deeper than in the case where the above-described ON state is set. When the safety button 5 is pressed, the safety pin 9 also moves in the direction of arrow 100, and the safety pin 9
In response to this movement, the rotating claw 60 is rotated more in the direction of arrow 95 than the position shown in FIG.

As a result, the lock engaging portion 62 provided on the rotating claw 60 is positioned so as to intersect the orbit of rotation of the lock engaging portion 65 in the direction of arrow 91 (see FIG. 5). . For this reason, when the switch trigger 4 is released, the lock engagement portion 62 engages with the lock engagement portion 65, and the switch trigger 4 is prevented from returning in the direction of the arrow 91 (see FIG. 6). ).

In this way, the ON state of the switch trigger 4 is maintained and the ON state is established. In addition, in the present embodiment, the lock engaging portion 62 is directly engaged with the lock engaging portion 65, but may be indirectly engaged through, for example, another member.

In the on-lock state shown in FIGS. 5 and 6, the rotating claw 60 cannot return in the direction of arrow 90. However, since the safety pin 9 is biased by the spring 11, the safety pin 9 returns independently in the direction of arrow 101 from the rotating claw 60. Therefore, the safety button 5 returns in the direction of arrow 94 at the same time when the depression of the safety button 5 is released. As a result, even in the on-lock state, the surface of the safety button 5 is located substantially on the same plane as the handle upper surface 2M, and the safety button 5 moves in the direction of arrow 95.
It does not remain dented in the direction.

To release the on-lock state, the switch trigger 4 is gripped more strongly and rotated in the direction of arrow 90 (see FIG. 7). By this, switch trigger 4
The lock engaging portion 65 and the lock engaging portion 62 of the rotating claw 60 are disengaged, and the rotating claw 60 is biased by the spring 63 to rotate in the direction of the arrow 90 to return.

As described above, since the switch claw 4 rotates in the directions of arrows 90 and 91, the rotary claw 60 rotates in the directions of arrows 90 and 91 along substantially the same plane. Also in this case, the smoothness of the return operation of the switch trigger 4 in the direction of arrow 91 is not hindered by the return operation of the rotating claw 60 in the direction of arrow 90, and a switch mechanism for an electric tool having excellent operability is provided. Obtainable.

The position of the switch trigger 4 in the OFF state shown in FIGS. 2 and 3 is the OFF position, the position of the safety button 5 is the prohibited position, and the position of the rotating claw 60 is the prohibited position. Further, in the ON state shown in FIG. 4, the position of the switch trigger 4 is the ON position, the position of the safety button 5 is the allowable position, and the position of the rotating claw 60 is the allowable position. Further, the position of the rotating claw 60 shown in FIGS. 5 and 6 is the on-lock position, and the position of the safety button 5 in the on-lock state shown in FIG. 5 is the on-lock position.

[Second Embodiment] Next, a second embodiment of the switch mechanism for an electric power tool according to the present invention will be described with reference to FIG. As shown in FIG. 8, in the present embodiment, a turning claw 80 is provided instead of the turning claw 60 shown in the first embodiment. The rotating claw 80 includes the safety engaging portion 6 included in the rotating claw 60 of the first embodiment.
1 (FIG. 2) is not provided.

As with the rotating claw 60 of the first embodiment, the rotating claw 80 also has an arrow 9 around the rotating claw shaft 80J.
It is rotatable in the directions 0 and 91 and is biased in the direction of arrow 90 by the coil spring 63. A lock engaging portion 82 is integrally provided on the rotating claw 80.

Since the rotary claw 80 is not provided with the safety engaging portion 61 (FIG. 2), the safety function is omitted in the switch mechanism of the electric tool according to the present embodiment. That is, when the switch trigger 4 is grasped from the state shown in FIG. 8, the trigger engagement portion 64 of the switch trigger 4 is engaged with the target (the safety engagement portion 6 of FIG. 2).
Since there is no 1), the switch trigger 4 can be rotated in the arrow 90 direction. Therefore, the switch main body 6 can be turned on by grasping the switch trigger 4 without pressing the safety button 5 in the direction of arrow 95.

As with the rotating pawl 60 of the first embodiment, the rotating pawl 80 is integrally provided with the lock engaging portion 82, so that the switch mechanism of the electric tool according to the present embodiment is turned on. It has a lock function. Switch trigger 4
After squeezing in the direction of arrow 90, the safety button 5 is deeply pressed in the direction of arrow 95, and the rotating claw 80 is rotated in the direction of arrow 95 via the safety pin 9 to switch the lock engaging portion 82. It can be engaged with the lock engaging portion 65 of the trigger 4 (see FIGS. 5 and 6).

The structure other than the rotating claw 80 is the same as that of the first embodiment. Therefore, the grinder shown in the first embodiment can be used as the grinder shown in the present embodiment only by replacing the turning pawl 60 shown in the first embodiment with the turning pawl 80 in the present embodiment. it can. That is,
The presence or absence of the safety mechanism can be selectively provided only by replacing the parts, and another model can be obtained without designing a different product.

[Third Embodiment] A third embodiment of the switch mechanism for an electric power tool according to the present invention will be described with reference to FIG. As shown in FIG. 9, in the present embodiment, a rotating pawl 85 is used instead of the rotating pawl 60 shown in the first embodiment.
Is provided. The rotary claw 85 is not provided with the lock engagement portion 62 (FIG. 2) included in the rotary claw 60 of the first embodiment.

As with the rotating claw 60 of the first embodiment, the rotating claw 85 also has an arrow 9 around the rotating claw shaft 85J.
It is rotatable in the directions 0 and 91 and is biased in the direction of arrow 90 by the coil spring 63. A safety engaging portion 86 is formed integrally with the rotating claw 85.

The rotating claw 85 has a safety engaging portion 86.
(FIG. 2) is formed, the switch mechanism of the power tool in the present embodiment is similar to that in the first embodiment.
It has a safety function. When the switch trigger 4 is grasped from the state shown in FIG. 9, the trigger engagement portion 64 of the switch trigger 4 engages with the safety engagement portion 86, and the switch trigger 4 can be further rotated in the direction of arrow 90. No (see Figure 3). This prevents the switch from being turned on unexpectedly.

Since the rotating claw 85 is not provided with the lock engaging portion 62 (FIG. 2), the on-lock function is omitted in the switch mechanism of the electric tool according to the present embodiment. That is, the lock engagement portion 65 of the switch trigger 4
Since the rotating claw 85 is not provided with a portion engaging with, the switch trigger 4 always immediately returns in the direction of arrow 91 when the switch trigger 4 is released.

The structure other than the rotating claw 85 is the same as that of the first embodiment. Therefore, the grinder shown in the first embodiment can be used as the grinder shown in the present embodiment only by replacing the turning pawl 60 shown in the first embodiment with the turning pawl 85 in the present embodiment. it can. That is,
The presence or absence of the on-lock mechanism can be selectively provided only by exchanging parts, and another model can be obtained without designing a different product.

[Fourth Embodiment] Next, a fourth embodiment of the switch mechanism for an electric power tool according to the present invention will be described with reference to FIGS. 10 to 12 are side sectional views showing details of the handle portion 2. 10 shows an off state, FIG. 11 shows an on state, and FIG. 12 shows an on-lock state. The switch trigger 4 is held by the handle portion 2 so as to be rotatable around the trigger shaft 4J in the directions of arrows 90 and 91, and is biased by the spring 16 in the direction of arrow 91. The tip of the switch trigger 4 is bent into an L shape, and a trigger engaging portion 4G is formed.

On the other hand, one end of the safety pin 9 is in contact with the inside of the tip of the safety button 5. The safety pin 9 is held by the pin holding portion 10,
The spring 11 biases the safety button 5 in the direction of arrow 96, that is, in the direction of pushing and returning the safety button 5 in the direction of arrow 94.

The other end of the safety pin 9 is in contact with the corner of the safety claw (auxiliary member) 7. This safety claw 7 is a safety claw shaft (center axis of auxiliary member)
It is rotatable about 7J in the directions of arrows 94 and 95, and is biased in the direction of arrow 95 by the coil spring 12.

A locking claw (lock member) 8 is provided near the safety claw 7. This locking claw 8
Is rotatable about the locking pawl shaft (lock member central shaft) 8J in the directions of arrows 90 and 91, and is biased by the spring 13 in the direction of arrow 91. The locking claw 8 is the regulation unit 1.
4 and the rotation in the direction of arrow 91 is restricted.

In the OFF state shown in FIG. 10, the safety claw engaging portion 7G of the safety claw 7 is engaged with the trigger engaging portion 4G of the switch trigger 4. The engagement between the safety pawl engaging portion 7G and the trigger engaging portion 4G prevents the switch trigger 4 from rotating in the direction of the arrow 90, and prevents the switch trigger 4 from being turned on unexpectedly. Although the safety pawl 7 is directly engaged with the switch trigger 4 in the present embodiment, it may be indirectly engaged with the switch trigger 4, for example, via another member.

When the motor is driven to start the rotation of the rotary grindstone 31, the safety button 5 is pushed in the direction of arrow 95. When the safety button 5 is pressed, the safety pin 9 moves in the direction of arrow 97, as shown in FIG.
Press the safety claw 7. This causes the safety pawl 7 to move against the urging force of the coil spring 12 in the direction of arrow 94.
Rotate in the direction.

By rotating the safety pawl 7 in the direction of arrow 94, the safety pawl engaging portion 7G of the safety pawl 7 and the trigger engaging portion 4 of the switch trigger 4 are moved.
The engagement with G is released, and the switch trigger 4 can be pushed in the direction of arrow 90 as shown in FIG.

In the state shown in FIG. 11 in which the switch trigger 4 is pushed in, the safety pawl 7 is in contact with the trigger engaging portion 4G of the switch trigger 4, so the safety pawl 7 should return to the position shown in FIG. I can't.
However, since the safety pin 9 is biased by the spring 11, the safety pin 9 returns independently in the direction of arrow 96 by itself.

Therefore, the safety button 5 returns to the direction of arrow 94 at the same time when the depression of the safety button 5 is released. As a result, the surface of the safety button 5 is located substantially on the same plane as the handle upper surface 2M, and the safety button 5 does not remain recessed in the direction of arrow 95.

When the switch trigger 4 is pushed in, the switch body 6 is turned on as described above, the motor is driven, and the rotary grindstone 31 starts to rotate. When the switch trigger 4 is released from the on state shown in FIG. 11, the switch trigger 4 returns in the direction of arrow 91. When the switch trigger 4 returns, the safety claw 7 also returns in the direction of arrow 95.

Here, the trigger shaft 4J of the switch trigger 4 and the safety pawl shaft 7J of the safety pawl 7 are located substantially parallel to each other. For this reason, the safety claw 7 rotates in the directions of arrows 94 and 95 along substantially the same plane as the plane (rotation plane) in which the switch trigger 4 rotates in the directions of arrows 90 and 91. Become.

As described above, since the plane on which the safety claw 7 rotates does not intersect the plane on which the switch trigger 4 rotates, the arrow 9 of the safety claw 7 is shown.
The return operation in the five directions does not hinder the smoothness of the return operation of the switch trigger 4 in the direction of the arrow 91, and a switch mechanism for an electric tool having excellent operability can be obtained.

When the safety button 5 is pressed again from the ON state shown in FIG. 11, the ON lock state shown in FIG. 12 can be obtained. In this case, the safety button 5 is pressed deeper than in the case where the above-described ON state is set. When the safety button 5 is pressed, the safety pin 9 also moves in the direction of arrow 97, and upon receipt of this movement of the safety pin 9, the safety pawl 7 moves from the position shown in FIG.
It makes a large rotation in four directions.

As a result, the rotation pressing portion 7K of the safety pawl 7 presses the locking pawl 8 and rotates the locking pawl 8 in the direction of arrow 90. Then, as shown in FIG. 12, the locking claw engaging portion 8G of the locking claw 8 is positioned so as to intersect on the trajectory of the rotation of the trigger engaging portion 4G of the switch trigger 4 in the direction of arrow 91. . After that, when the switch trigger 4 is released, the locking claw engaging portion 8G engages with the trigger engaging portion 4G, and the rotation return of the switch trigger 4 in the arrow 91 direction is blocked.

Thus, the ON state of the switch trigger 4 is maintained and the ON state is established. In addition, in the present embodiment, the locking claw 8 is directly engaged with the switch trigger 4, but may be indirectly engaged with the switch trigger 4, for example, via another member.

In the on-lock state shown in FIG. 12, the locking claw 8 cannot return in the direction of arrow 91. But,
Since the safety pin 9 is biased by the spring 11, the safety pin 9 returns independently in the direction of arrow 96 by itself. Therefore, the safety button 5 returns in the direction of arrow 94 at the same time when the depression of the safety button 5 is released. In the present embodiment, when the depression of the safety button 5 is released in the on-lock state, the safety pawl 7 is biased by the coil spring 12 and rotates in the direction of arrow 95 to return to the position shown in FIG. .

As described above, the safety pin 9 has the spring 1
Since it is biased independently by 1, even in the on-lock state, the surface of the safety button 5 is substantially flush with the handle upper surface 2M, and the safety button 5 remains recessed in the direction of arrow 95. It does not last in the state of.

To release the on-lock state, the switch trigger 4 is gripped more strongly and rotated in the direction of arrow 90. As a result, the engagement between the end of the trigger engaging portion 4G of the switch trigger 4 and the locking pawl engaging portion 8G of the locking pawl 8 is released, and the switch trigger 4 is returned in the direction of the arrow 91 by the bias of the spring 16. To do. Further, the safety pawl 7 is rotated and returned by the coil spring 12 in the direction of arrow 95, and the lock pawl 8 is rotated and returned by the spring 13 in the direction of arrow 91.

As described above, the safety claw 7 rotates in the directions of arrows 94 and 95 along substantially the same plane as the plane in which the switch trigger 4 rotates in the directions of arrows 90 and 91. In this case as well, the returning operation of the safety pawl 7 in the direction of the arrow 95 does not hinder the smoothness of the returning operation of the switch trigger 4 in the direction of the arrow 91. Obtainable.

In the OFF state shown in FIG. 10, the position of the switch trigger 4 is the OFF position, the position of the safety button 5 is the prohibited position, the position of the safety pawl 7 is the prohibited position, and the position of the locking pawl 8 is the unlocked position. Is. Also,
In the ON state shown in FIG. 11, the position of the switch trigger 4 is the ON position, the position of the safety button 5 is the allowable position, the position of the safety pawl 7 is the allowable position, and the position of the locking pawl 8 is the same unlocked position as in FIG. Is.

Further, in the on-lock state shown in FIG. 12, the position of the safety button 5 is the on-lock position, the position of the safety pawl 7 is the on-lock position, and the position of the locking pawl 8 is the on-lock position. The position of the switch trigger 4 shown in FIG. 12 is slightly moved in the direction of arrow 91 from the position shown in FIG. However, since the rotating grindstone 31 is rotated with the motor turned on,
The position of the switch trigger 4 shown in FIG. 2 is substantially the same as the on position shown in FIG.

[Fifth Embodiment] Next, a fifth embodiment of the switch mechanism for an electric tool according to the present invention will be described with reference to FIGS.
4 will be described. First Embodiment and Fourth Above
In the embodiment, the safety function is provided in which the switch trigger 4 cannot be pushed into the on state without pressing the safety button 5, but in the present embodiment, the safety function is not provided.

In this embodiment, an intermediate claw (intermediate member) 1 is used instead of the safety claw 7 shown in the fourth embodiment.
5 are provided. The intermediate pawl 15 is rotatable about the intermediate pawl shaft (intermediate member center shaft) 15J in the directions of arrows 94 and 95, and is biased by the coil spring 12 in the direction of arrow 95.

FIG. 13 shows an off state, and if the switch trigger 4 is gripped and pushed in from this state, it is turned on. Then, when the switch trigger 4 is released, the switch trigger 4 immediately returns to the state shown in FIG. 13 and becomes the off state. Since the safety pin 9 is biased by the spring 11, the safety button 5 returns in the direction of arrow 94 at the same time when the depression of the safety button 5 is released. As a result, the surface of the safety button 5 is located substantially on the same plane as the handle upper surface 2M, and the safety button 5 does not remain recessed in the direction of arrow 95.

If the safety button 5 is depressed after the switch trigger 4 is pushed in to be in the ON state, the safety pin 9 receives the arrow 97 in response to the depression of the safety button 5.
The intermediate claw 15 rotates in the direction of arrow 94. The rotation pressing portion 15K of the intermediate claw 15 presses the locking claw 8 by the rotation of the intermediate claw 15 to rotate the locking claw 8 in the direction of the arrow 90, and the locking claw engaging part 8G of the locking claw 8 is rotated. Engages with the end of the trigger engaging portion 4G of the switch trigger 4 to prevent the switch trigger 4 from returning in the direction of arrow 91. Thus, the ON state of the switch trigger 4 is maintained and the ON state is established.

In the on-lock state shown in FIG. 14, the locking claw 8 cannot return in the direction of arrow 91. But,
Since the safety pin 9 is biased by the spring 11, it returns independently in the direction of arrow 96. Therefore, the safety button 5 returns in the direction of arrow 94 at the same time when the depression of the safety button 5 is released. In the present embodiment, when the pressing of the safety button 5 is released in the on-lock state, the intermediate claw 15 is not connected to the coil spring 12.
In response to the urging force of the arrow, it rotates in the direction of arrow 95 and returns.

As described above, the safety pin 9 has the spring 1
Since it is biased independently by 1, even in the on-lock state, the surface of the safety button 5 is substantially flush with the handle upper surface 2M, and the safety button 5 remains recessed in the direction of arrow 95. It does not last in the state of.

To release the on-lock state, the switch trigger 4 is gripped more strongly and rotated in the direction of arrow 90. As a result, the engagement between the end of the trigger engaging portion 4G of the switch trigger 4 and the locking pawl engaging portion 8G of the locking pawl 8 is released, and the locking pawl 8 is rotated by the spring 13 in the direction of arrow 91. To return.

In the OFF state shown in FIG. 13, the position of the safety button 5 is the unlocked position, and the position of the intermediate claw 15 is the unlocked position. The position of the intermediate claw 15 in the on-lock state shown in FIG. 14 is the on-lock position.

The other structure is the same as that of the fourth embodiment. As described above, in this embodiment, the safety pawl 7 in the fourth embodiment is the intermediate pawl 1
The only difference is that it is replaced by 5. Moreover, the safety pawl shaft 7J of the safety pawl 7 and the intermediate pawl shaft 15J of the intermediate pawl 15 are at the same position.

Therefore, the safety claw 7 and the intermediate claw 1
The grinder shown in the fourth embodiment can be replaced with the grinder shown in the present embodiment simply by replacing the grinder with the one shown in FIG. That is, the presence or absence of the safety mechanism can be selectively provided only by exchanging the parts, and another model can be obtained without designing a different product.

[Sixth Embodiment] As a sixth embodiment, the locking claw 8 and the spring 13 can be removed from the structure shown in the fourth embodiment (not shown). In this case, it is possible to obtain a grinder that does not have an on-lock mechanism but has only the safety mechanism with the safety claw 7. That is, the presence or absence of the on-lock mechanism can be selectively provided only by removing the parts, and another model can be obtained without designing a different product.

[Other Embodiments] In each of the above-described embodiments, the grinder is illustrated as an electric tool, but the present invention is not limited to this and can be applied to a switch mechanism of another electric tool. . Further, the shapes and mechanisms of the switch trigger 4, the safety button 5, the safety pin 9, the spring 11, the rotating claw 60, the safety claw 7, the intermediate claw 15, the locking claw 8 and other members exemplified in each of the above-described embodiments may be changed. Not limited, other shapes,
A mechanism may be adopted.

In each of the above embodiments, the safety button 5 is biased by the spring 11 via the safety pin 9. However, for example, the safety button 5 may be directly urged by the spring 11. Further, the spring 11 composed of a coil spring is illustrated as the biasing portion,
A leaf spring or the like can also be adopted.

[Brief description of drawings]

FIG. 1 is a perspective view of a grinder showing a first embodiment of a switch mechanism for an electric power tool according to the present invention.

FIG. 2 is a side sectional view of a handle portion of the grinder shown in FIG. 1, showing an off state.

FIG. 3 is a side sectional view of a handle portion of the grinder shown in FIG. 1, showing an off state.

FIG. 4 is a side sectional view of a handle portion of the grinder shown in FIG. 1, showing an ON state.

5 is a side sectional view of a handle portion of the grinder shown in FIG. 1, showing an on-lock state.

6 is a side sectional view of a handle portion of the grinder shown in FIG. 1, showing an on-lock state.

7 is a side sectional view of the handle portion of the grinder shown in FIG. 1, showing a state when the on-lock state is released.

FIG. 8 is a side sectional view of a handle portion of a grinder showing a second embodiment of a switch mechanism for an electric tool according to the present invention.

FIG. 9 is a side sectional view of a handle portion of a grinder showing a third embodiment of a switch mechanism for an electric power tool according to the present invention.

FIG. 10 is a fourth switch mechanism of the electric power tool according to the present invention.
It is a side sectional view of the handle part of the grinder showing the embodiment of the above, showing the off state.

11 is a side sectional view of a handle portion of the grinder shown in FIG. 10, showing an on state.

12 is a side sectional view of a handle portion of the grinder shown in FIG. 10, showing an on-lock state.

FIG. 13 is a fifth part of the switch mechanism of the electric power tool according to the present invention.
It is a side sectional view of the handle part of the grinder showing the embodiment of the above, showing the off state.

14 is a side sectional view of a handle portion of the grinder shown in FIG. 13, showing an on-lock state.

FIG. 15 is a perspective view showing a switch mechanism of an electric power tool according to a first conventional example.

FIG. 16 is a perspective view showing a grinder according to a second conventional example.

17 is a diagram showing an off state of the handle portion of the grinder shown in FIG. 16, where A is a side sectional view and B is A.
FIG. 13 is a cross-sectional view taken along arrow XVIIB-XVIIB.

FIG. 18 is a view showing an ON state of a handle portion of the grinder shown in FIG. 16, where A is a side sectional view and B is A.
FIG. 9 is a cross-sectional view taken along arrow XVIIIB-XVIIIB.

[Explanation of symbols]

 2 ... Handle part 2M ... Handle upper surface 4 ... Switch trigger 4G ... Trigger engagement part 5 ... Safety button 7 ... For safety Claw 7G: Safety claw engaging part 8: Locking claw 8G: Locking claw engaging part 9: Safety pin 11: Spring 15・ ・ ・ ・ ・ Intermediate claw 60 ・ ・ ・ Rotating claw 61 ・ ・ ・ Safety engaging part 62 ・ ・ ・ ・ ・ Lock engaging part 64 ・ ・ ・ ・ ・ Trigger engaging part 65 ・ ・ ・..Lock engaging parts

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[Procedure amendment]

[Submission date] February 3, 1997

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Claims (7)

[Claims] 1. An operating switch provided on a handle part of an electric power tool for switching between an off position and an on position, and an operating part provided on a handle part of an electric power tool and having an operation surface for receiving a pressure. , The operating surface is switched to a prohibited position where the operating surface is located substantially on the same surface as the operating surface of the handle, or to an allowable position where the operating surface is recessed from the operating surface to the inside of the operating surface by being pressed. A switch mechanism for an electric tool having an operating part that is operated and an urging part that constantly urges the operating part toward a prohibited position, the operating part being in the allowable position only when being pressed against the operation surface. When the pressure is released, the operating part is urged by the urging part and returns from the allowable position to the prohibited position.When the operating part is in the prohibited position, the operation switch is switched from the off position to the on position. Instead a non, when the operation unit is in the permitting position, actuating switch can be switched on position from the off position, the power tool switch mechanism, characterized in that. 2. An operating switch which is provided on a handle part of an electric power tool and can be switched to an off position or an on position, and an operating part which is provided on a handle part of the power tool and has an operation surface for receiving a pressing force. , The prohibited position where the operating surface is located substantially on the same plane as the handle surface, the allowable position where the operating surface is recessed from the handle surface toward the inside of the handle by pressing, or the pressing The operating part can be switched to the on-lock position where the operating surface is further recessed toward the inside of the handle part by receiving it, the urging part that constantly urges the operating part toward the prohibited position, the rotation center axis A rotating member that is switched to a prohibited position, a permitted position, or an on-lock position by rotating around the A switch mechanism for an electric tool, comprising: a rotating member that can be switched in response to an operation, wherein the operating section is in the allowable position or the on-lock position only when the operating surface is being pressed, and the pressing is released. The operating part is biased by the biasing part and independently returns from the allowed position or the on-lock position to the prohibited position, and when the turning member is in the prohibited position, the operating member is moved to the operation switch located in the off position. When the operating member cannot be switched from the off position to the on position by directly or indirectly engaging with it, and the rotating member is in the allowable position, the engagement with the operating switch is released and the operating switch is turned off. When the rotary member is in the on-lock position, the rotating member engages with the actuating switch located in the on-position directly or indirectly to actuate the actuating switch. A switch mechanism for an electric power tool, which cannot switch from an on position to an off position. 3. An operating unit provided on a handle part of an electric power tool, which is switched to an off position or an on position, and an operating part provided on a handle part of the electric power tool, having an operation surface for receiving a pressure. , The prohibited position where the operating surface is located substantially on the same plane as the handle surface, the allowable position where the operating surface is recessed from the handle surface toward the inside of the handle by pressing, or the pressing The operating surface can be switched to the on-lock position where the operating surface is further recessed toward the inside of the handle by receiving it.The urging portion that constantly urges the operating surface toward the prohibited position. It is an auxiliary member that can be switched to the prohibited position, the permitted position or the on-lock position by rotating around the An auxiliary member that is switched according to the changing operation, and a lock member that is switched to an unlocked position or an on-lock position by rotating around the central axis of the lock member, and the auxiliary member is in the prohibited position and the allowed position. When the auxiliary member is in the non-lock position, the auxiliary member is switched from the permissible position to the on-lock position and rotated to switch from the non-lock position to the on-lock position. The operating part is in the allowable position or the on-lock position only when it is pressed against the operation surface, and when the pressing is released, the operating part is biased by the biasing part and independently operates in the allowable position or the on-lock position. When the on-lock position returns to the prohibited position and the auxiliary member is in the prohibited position, the auxiliary member directly or indirectly engages with the operation switch to cause the operation. When the switch cannot be switched from the off position to the on position, the auxiliary member is disengaged from the actuation switch when the auxiliary member is in the allowance position, and the actuation switch can be switched from the off position to the on position. When the lock member is in the on-lock position, it directly or indirectly engages the actuation switch to prevent the actuation switch from switching from the on position to the off position, and when the lock member is in the unlocked position, the engagement with the actuation switch is prevented. A switch mechanism for an electric tool, wherein the operation switch can be opened to switch from an on position to an off position. 4. A switch mechanism for an electric tool according to claim 2 or 3, wherein the operation switch is switched to an off position or an on position by rotating along a predetermined rotating plane, The switch member for an electric tool, wherein the rotating member or the auxiliary member rotates along a plane substantially the same as the rotating plane. 5. An operating unit, which is provided on a handle portion of an electric tool and can be switched to an off position or an on position, and an operating portion which is provided on a handle portion of the electric tool and has an operation surface for receiving a pressing force. , An unlocked position where the operating surface is located substantially on the same plane as the handle surface of the handle, or an on-lock position where the operating surface is recessed from the handle surface toward the inside of the handle by being pressed. The operating part that can be switched to, the urging part that constantly urges the operating part toward the unlocked position, and the intermediate member that can be switched to the unlocked position or the on-lock position by rotating around the center axis of the intermediate member. By rotating around the central axis of the intermediate member or the lock member that is rotated and switched according to the switching operation of the unlocking position or the on-lock position of the operating portion. And a lock member that is switched to a non-locked position or an on-locked position, and that is switched in response to a switching operation of the non-locked position or the on-locked position of the intermediate member. The operating part is in the on-lock position only when it is pressed against the operation surface, and when the pressing is released, the operating part is biased by the biasing part and independently moves from the on-lock position to the unlocked position. When the lock member is in the on-lock position, it directly or indirectly engages the operation switch to disable the operation switch from the on-position to the off-position, and the lock member is in the unlocked position. , The engagement with the actuation switch is released so that the actuation switch can be switched from the on position to the off position. Ingredients of the switch mechanism. 6. An operating unit provided on a handle portion of an electric power tool for switching between an off position and an on position, and an operating portion provided on a handle portion of an electric power tool and having an operation surface for receiving a pressure. , The operating surface is switched to a prohibited position where the operating surface is located substantially on the same surface as the operating surface of the handle, or to an allowable position where the operating surface is recessed from the operating surface to the inside of the operating surface by being pressed. The operating part, the urging part that constantly urges the operating part toward the prohibited position, and the auxiliary member that can be switched to the prohibited position or the permitted position by rotating around the auxiliary member central axis. A switch mechanism for an electric tool, comprising: an auxiliary member that can be switched in response to a switching operation between a prohibited position or an allowable position, wherein the operating portion is pressed against the operating surface. When the pressing force is released, the operating part is biased by the biasing part and independently returns from the allowed position to the prohibited position. When the auxiliary member is in the allow position, the auxiliary member is disengaged from the operation switch to disengage the operation switch from the off position by indirectly engaging the operation switch with the operation switch from the off position to the on position. A switch mechanism for an electric power tool, which can be switched to an on position. 7. A power tool switch mechanism according to claim 4, wherein the auxiliary member is replaced with the intermediate member according to claim 5, whereby the power tool switch mechanism according to claim 5 can be obtained. Alternatively, the switch mechanism for an electric tool according to claim 6 can be obtained by removing the lock member.