JP2977076B2 - Power tool switch mechanism - Google Patents

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 more particularly to a switch mechanism which 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 of a power tool which can be provided in a fixed manner.

[0002]

[Prior art]

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

A safety button 7 is provided on the upper surface of the handle 2.
0 is provided to prevent sudden turning on. That is, in normal times, the switch trigger 4 cannot be pressed. The safety button 70 is rotatable in the directions of arrows 94 and 95 about the button shaft 70J, and is urged by a spring 71 in the direction of arrow 94.

[0004] 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, the switch trigger 4 is set to an arrow 90
When the switch trigger 4 is to be pushed in the direction, the trigger engagement portion 76 of the switch trigger 4 and the engagement portion 74 of the safety button 70 abut against each other, so that the switch trigger 4 is prevented from being pushed.

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. As a result, the switch trigger 4 turns the arrow 9
It is possible to rotate in the zero direction.

When the safety button 70 is further pushed in the direction of the arrow 95 while the switch trigger 4 is pushed in, 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 engages with the recess formed on the engagement portion 74 on the safety button 70 side, and the switch trigger 4 Is locked.

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

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

As shown in FIG. 17A, the switch trigger 4 is provided with a safety button 32. The safety button 32 includes a button bar 32a and a stopper 32b, and penetrates through 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.
Is packed. The safety button 32 is a spring 3
3 is urged in the direction of arrow 93.

Since the stopper 32b of the safety button 32 is inserted into 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 on the safety button 32
Is pressed in the direction of arrow 92 (FIG. 17B). As a result, the stopper 32b of the safety button 32 moves, and comes off from the button hole 4b of the switch trigger 4.

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

To switch from the ON state to the OFF state, the switch trigger 4 is released by releasing the grip.
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 squeezed in the direction of arrow 90, the back surface 74 of the engagement portion 74 is turned on.
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 arrow 94 direction. Also, in the on-lock state, the lock button provided on the switch trigger 4 is engaged with the concave portion formed on the lock button 74 on the safety button 70 side. Does not return in the direction.

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

Further, there is a possibility that cutting powder or the like accumulated in the safety button 70 may enter the handle portion 2 and cause a failure, which causes a problem that the durability of the power tool is reduced. Further, when the safety button 70 returns in the direction of the arrow 94, a finger or the like may be caught in the recessed portion of the safety button 70. Further, since the safety button 70 remains recessed from the upper surface of the handle portion 2 during the ON state or the ON lock state, there is a problem that the appearance is impaired.

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 depressed in the direction of arrow 92, and there is a problem that the appearance is impaired.

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 the arrow 93 by the stopper 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 which is going to return in the direction of arrow 91 (FIG. 18A) is moved from the side in the direction of arrow 93 (FIG. 18B) by the stopper 32b. ) And may not return smoothly. For this reason, the problem that operability is bad arises.

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

Therefore, the present invention provides a switch for a power tool which 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 power tool switch mechanism provided at a handle of an electric tool, an operation switch for switching between an off position and an on position, and provided at a handle of the power tool. An operation unit having an operation surface that receives a pressure, wherein the operation surface is substantially prohibited from being located on the same plane as the handle portion surface of the handle portion.
Or, an operating portion which is switched to an allowable position in which the operating surface is depressed toward the inside of the handle portion from the handle portion surface by receiving the pressing, an urging portion which constantly urges the operating portion toward the prohibited position. A switch mechanism of the power tool, wherein the operation unit is in the allowable position only when the operation surface is being pressed, and when the pressing is released, the operation unit is urged by the urging unit to be in the allowable position. From the off position to the on position when the operation unit is in the prohibition position, and the operation switch can be switched from the off position to the on position when the operation unit is in the allowable position. It is characterized by the fact that

According to a second aspect of the present invention, the switch mechanism for the power tool is provided on the handle of the power tool, and is provided on the handle of the power tool for switching between the off position and the on position. An operating portion having an operating surface for receiving the operating portion, wherein the operating surface is substantially in the same plane as the handle portion surface of the handle portion; The operation part is switched from the allowable position to the on-lock position, which is further recessed toward the inside of the handle when receiving the pressure. A biasing portion that is biased, a rotating member that is switched to a prohibited position, an allowable position, or an on-lock position by rotating about a rotation center axis; A switch mechanism for a power 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 operation unit is in the allowable position or the on-lock position only when pressed against the operation surface. When the pressing is released, the operation unit is urged by the urging unit, and independently returns to the prohibited position from the allowable position or the on-lock position.When the rotating member is in the prohibited position, the activation switch is located in the off position
Engaging the non switched on position the operating switch from off position, rotating member, when in the acceptable position, be solved is the engagement of the activation switch in the on position the operating switch from off position and switchable, rotating member, when in the on-lock position, the non switched off position the actuating switch from oN position to engage the activation switch located at the oN position, it is characterized in that.

According to a third aspect of the present invention, the switch mechanism of the power tool is provided on the handle of the power tool, and is provided on the handle of the power tool to be switched to an off position or an on position, and is provided on the handle of the power tool. An operating portion having an operating surface for receiving the operating portion, wherein the operating surface is substantially in the same plane as the handle portion surface of the handle portion; The operation part is switched from the allowable position to the on-lock position, which is further recessed toward the inside of the handle when receiving the pressure. An urging portion, an auxiliary member that is switched to a prohibiting position, an allowable position, or an on-lock position by rotating about an auxiliary member central axis; 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 about a lock member center axis, wherein the auxiliary member is in a non-lock position when the auxiliary member is in a prohibited position and an allowable position, and A switch member for a power tool, comprising: a lock member that is rotated in response to switching from the allowable position to the on-lock position and is switched from the unlocked position to the on-lock position. When the pressing is released, the operating unit is urged by the urging unit and independently returns from the allowable position or the on-lock position to the prohibited position when the pressing is released, and member, when in the inhibition position, engages the work dynamic switch impossible switched on position the operating switch from off position, the auxiliary member, When in the volume position, is released of engagement with the actuating switch and can be switched to the on position the operating switch from off position, the locking member, when in the on-lock position, engages the work dynamic switch the The operation switch cannot be switched from the on position to the off position, and the lock member is disengaged from the operation switch when the lock member is in the unlocked position so that the operation switch can be switched from the on position to the off position. It is characterized by.

According to a fourth aspect of the present invention, there is provided a power tool switch mechanism 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, wherein the rotating member or the auxiliary member is
It is characterized in that it turns along substantially the same plane as the turning plane.

According to a fifth aspect of the present invention, there is provided a power tool switch mechanism provided on a handle of the power tool, an operation switch for switching between an OFF position and an ON position, and a switch mechanism for pressing the power tool. An operating portion having an operating surface for receiving the handle portion, wherein the operating surface is substantially in the same plane as the handle portion surface of the handle portion, or the operating surface is moved from the handle portion surface by receiving a pressure. The operating part that is switched to the on-lock position that is recessed toward the inside, the urging part that constantly urges the operating part toward the non-locking position, and the non-locking position or An intermediate member that can be switched to the on-lock position, the intermediate member being rotated and switched in accordance with a switching operation of the operation unit between the unlock position and the on-lock position; A lock member that is switched to an unlocked position or an on-lock position by rotating about a member central axis, wherein the lock member is switched in response to a switching operation of the intermediate member between the unlocked position and the on-lock position. A switch mechanism of the power tool provided, wherein the operation unit is in the on-lock position only when being pressed against the operation surface, and when the pressing is released, the operation unit is urged by the urging unit; independently returns to the unlocked position from the oN lock position, the lock member, when in the on-lock position, engages the work dynamic switch impossible switched off position the operation switch from the on position, the locking member When in the unlocked position, disengagement with the actuation switch enables the actuation switch to be switched from the on position to the off position. It is characterized.

The switch mechanism for a power tool according to the present invention is provided on a handle of the power tool, and is provided on an operation switch for switching between an off position and an on position, and on a handle of the power tool. An operating portion having an operating surface for receiving the operating portion, wherein the operating surface is substantially in the same plane as the handle portion surface of the handle portion; An operation unit that is switched to an allowable position that is recessed inward, an urging unit that constantly urges the operation unit toward the prohibited position,
An auxiliary member which is switched to a prohibited position or an allowed position by rotating about the auxiliary member center axis, and which is switched in response to a switching operation of the operation unit between the prohibited position or the allowed position. A switch mechanism of the tool, wherein the operation unit is at the allowable position only when the operation surface is being pressed, and when the pressing is released, the operation unit is biased by the urging unit and is independently permitted. returned to inhibition position from the position, the auxiliary member when in the inhibition position, engages the work dynamic switch impossible switched on position the operating switch from off position, the auxiliary member, when in the acceptable position, It is characterized in that the engagement with the operation switch is released and the operation switch can be switched from the off position to the on position.

The switch mechanism for a power tool according to the present invention is provided on a handle of the power tool, and is set to an off position.
Switch or power tool that can be switched to the on or on position
Operating surface for receiving pressure.
Operation part, the operation surface of which is
The prohibition position, which is located substantially on the same plane,
And the operation surface is moved from the handle surface to the inside of the handle
At a tolerance position that is recessed toward
The operating surface from the allowable position further into the handle.
Operation unit and operation that can be switched to the recessed on-lock position
Parts constantly urging portion for urging the forbidden location, the central axis
By turning to the center, the prohibited position, the allowed position or
An auxiliary member that can be switched to the on-lock position.
Cut off the prohibition position, allowable position or on-lock position of the operation
Auxiliary member that is switched in response to a change operation, the center
The shaft can be replaced with the auxiliary member, and the center axis is
Pivot to unlock or unlock position
Is an intermediate member that can be switched to the
Turn off the stop position or allowable position, or the on-lock position
An intermediate member that is rotated and switched in response to the changing operation,
By rotating around the central axis of the locking member,
Lock section that can be switched to the lock position or on-lock position
Wood, a switch mechanism of the power tool equipped with the complement
When the auxiliary member is provided, the lock member is
Is in the unlocked position when the
Switch the auxiliary member from the allowable position to the on-lock position.
Rotated in response to switching, from the unlocked position to the on-lock position
And the intermediate member is provided.
When the lock member is in the unlocked position or
It is switched in response to the switching operation of the lock position, before
The operation switch rotates along a predetermined rotation plane.
Switch to the off or on position,
The auxiliary member has a substantially same plane as the rotation plane.
The operation unit rotates upward, and the operation unit receives the pressure on the operation surface.
Is in the allowable position or on-lock position only when
When the pressing is released, the operation unit is biased by the biasing unit.
From the allowed position or the on-lock position independently.
When the auxiliary member is in the prohibited position,
From the off position by engaging the motion switch.
It is impossible to switch to the ON position, and the auxiliary member is
At some point, the engagement with the operation switch is released and the operation switch
Switch from the off position to the on position .
When the locking member is in the on-lock position, the operation switch
To move the operation switch from the ON position to the OFF position.
Switching is disabled and the lock member is in the unlocked position
When the operation switch is disengaged from the
The switch can be switched from the on position to the off position . The switch of the power tool according to claim 8.
The mechanism is provided on the handle of the power tool,
Operating switch is switched to location or ON position, the electric
An operation surface that is provided on the handle of the tool and receives pressure
An operating unit having a handle, wherein the operating surface is a handle of the handle.
The prohibition position, which is located substantially on the same plane as the surface,
By doing so, the operation surface moves from the handle surface to the handle
Allowable position depressed inward or subjected to pressure
Operation surface from the allowable position further inside the handle
An operation unit that can be switched to the on-lock position
A biasing unit and an auxiliary that constantly bias the operation unit toward the prohibited position
By turning around the member center axis, the prohibited position
Auxiliary member that can be switched to the rest position or on-lock position
The operation unit's prohibition position,
Auxiliary unit that can be switched in response to the switching operation of the lock position
By rotating around the central axis of the
The lock that can be switched to the lock position or the on-lock position
Lock member, wherein the auxiliary member is in a forbidden position and an allowable position.
In the unlocked position when in the
From the position to the on-lock position.
Lock that can be switched from the unlocked position to the on-lock position
Click member, a switch mechanism of the power tool equipped with a front
The operation switch rotates along a predetermined rotation plane.
Switch to the off or on position,
The auxiliary member has a substantially same plane as the rotation plane.
The operation unit rotates upward, and the operation unit receives the pressure on the operation surface.
Is in the allowable position or on-lock position only when
When the pressing is released, the operation unit is biased by the biasing unit.
From the allowed position or the on-lock position independently.
When the auxiliary member is in the prohibited position,
From the off position by engaging the motion switch.
It is impossible to switch to the ON position, and the auxiliary member is
At some point, the engagement with the operation switch is released and the operation switch
Switch from the off position to the on position .
When the locking member is in the on-lock position, the operation switch
To move the operation switch from the ON position to the OFF position.
Switching is disabled and the lock member is in the unlocked position
When the operation switch is disengaged from the
Is capable of switching switch from the on position to the off position, lock
The locking member is removable .

[0027]

According to the switch mechanism of the power tool according to the first aspect, the operating portion is at the allowable position only when the operating surface is pressed, and when the pressing is released,
The operation unit receives the urging by the urging unit and returns from the allowable position to the prohibited position.

That is, when the operating surface of the operating unit is not pressed, the operating surface of the operating unit is always substantially on the same plane as the handle surface, and the operating surface of the operating unit remains depressed from the handle surface. Will not last. Therefore, there is no possibility that cutting powder or the like accumulates in the recessed portion, and there is no possibility that the cutting powder or the like will hinder the smooth return of the operation unit to the prohibited position, and a switch mechanism of a power tool having excellent operability is obtained. Can be.

Further, since cutting powder and the like do not accumulate in the recessed portion, no failure occurs due to intrusion of the cutting powder and the like, and a switch mechanism of a power tool having excellent durability can be obtained. Furthermore, since the operation unit does not continue to be recessed from the handle surface, a finger or the like is not caught in the recessed portion, and a switch mechanism of the power tool having excellent safety can be obtained. . In addition, when the pressing of the operation unit against the operation surface is released, the operation tool returns from the allowable position to the prohibited position, so that the appearance of the power tool does not deteriorate.

In the switch mechanism of the power tool according to the second aspect, the operating portion is in the allowable position or the on-lock position only when being pressed against the operating surface, and when the pressing is released, the operating portion is attached. Receiving the bias of the forces,
It independently returns from the allowable position or the on-lock position to the prohibited position.

That is, when the operating surface of the operating unit is not pressed, the operating surface of the operating unit is always substantially on the same plane as the handle surface, and the operating surface of the operating unit remains depressed from the handle surface. Will not last. Therefore, there is no possibility that cutting powder or the like accumulates in the recessed portion, and there is no possibility that the cutting powder or the like will hinder the smooth return of the operation unit to the prohibited position, and a switch mechanism of a power tool having excellent operability is obtained. Can be.

Further, since cutting powder and the like do not accumulate in the recessed portion, no failure occurs due to penetration of the cutting powder and the like, and a switch mechanism of an electric tool having excellent durability can be obtained. Furthermore, since the operation unit does not continue to be recessed from the handle surface, a finger or the like is not caught in the recessed portion, and a switch mechanism of the power tool having excellent safety can be obtained. . In addition, when the pressing of the operation unit against the operation surface is released, the operation tool returns from the allowable position to the prohibited position, so that the appearance of the power tool does not deteriorate.

Further, when the rotating member is at the forbidden position,
When engaged with the operating switches at the OFF position as a non switched on position the operating switch from off position, and rotating member is in the on-lock position, engages the activation switch located at the ON position The operation switch cannot be switched from the ON position to the OFF position.

As described above, by using a single rotating member, it is possible to prohibit 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 for a power 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 when the pressing is released, the operating portion is attached. Receiving the bias of the forces,
It independently returns from the allowable position or the on-lock position to the prohibited position.

That is, when the operation surface of the operation unit is not pressed, the operation surface of the operation unit is always substantially on the same plane as the handle surface, and the operation surface of the operation unit remains depressed from the handle surface. Will not last. Therefore, there is no possibility that cutting powder or the like accumulates in the recessed portion, and there is no possibility that the cutting powder or the like will hinder the smooth return of the operation unit to the prohibited position, and a switch mechanism of a power tool having excellent operability is obtained. Can be.

Further, since cutting powder and the like do not accumulate in the recessed portion, no failure occurs due to intrusion of the cutting powder and the like, and a switch mechanism of a power tool having excellent durability can be obtained. Furthermore, since the operation unit does not continue to be recessed from the handle surface, a finger or the like is not caught in the recessed portion, and a switch mechanism of the power tool having excellent safety can be obtained. . In addition, when the pressing of the operation unit against the operation surface is released, the operation tool returns from the allowable position or the on-lock position to the prohibition position, so that the appearance of the power tool is not spoiled.

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

Therefore, the plane on which the turning member or the auxiliary member turns does not intersect the turning plane on which the operation switch turns. Therefore, the smoothness of the turning operation of the operation switch is not impaired by the turning of the turning member or the auxiliary member, and a switch mechanism of the power tool having excellent operability can be obtained.

In the switch mechanism of the power tool according to the fifth aspect, the operating portion is in the on-lock position only when the operating portion is being pressed, and when the pressing is released, the operating portion is operated by the biasing portion. Receiving the bias, it returns independently to the unlocked position from the on-lock position.

That is, when the operating surface of the operating unit is not pressed, the operating surface of the operating unit is always substantially on the same plane as the handle surface, and the operating surface of the operating unit remains depressed from the handle surface. Will not last. Therefore, there is no possibility that the cutting powder or the like accumulates in the recessed portion, and there is no possibility that the smooth return of the operation unit to the unlocked position is hindered by the cutting powder and the like, and a switch mechanism of the power tool having excellent operability is obtained. be able to.

Further, since cutting powder and the like do not accumulate in the recess, no failure occurs due to intrusion of the cutting powder and the like, and a switch mechanism of an electric tool having excellent durability can be obtained. Furthermore, since the operation unit does not continue to be recessed from the handle surface, a finger or the like is not caught in the recessed portion, and a switch mechanism of the power tool having excellent safety can be obtained. . Further, when the pressing of the operation portion on the operation surface is released, the operation returns from the locked position to the unlocked position, so that the external appearance of the power tool is not spoiled.

In the switch mechanism for a power tool according to the present invention, the operating portion is at the allowable position only when the operating portion is being pressed, and when the pressing is released, the operating portion is pressed by the biasing portion. And return to the prohibited position from the allowed position independently.

That is, when the operating surface of the operating unit is not pressed, the operating surface of the operating unit is always substantially on the same plane as the handle surface, and the operating surface of the operating unit remains depressed from the handle surface. Will not last. Therefore, there is no possibility that cutting powder or the like accumulates in the recessed portion, and there is no possibility that the cutting powder or the like will hinder the smooth return of the operation unit to the prohibited position, and a switch mechanism of a power tool having excellent operability is obtained. Can be.

Further, since cutting powder and the like do not accumulate in the recessed portion, no failure occurs due to intrusion of the cutting powder and the like, and a switch mechanism of an electric tool having excellent durability can be obtained. Furthermore, since the operation unit does not continue to be recessed from the handle surface, a finger or the like is not caught in the recessed portion, and a switch mechanism of the power tool having excellent safety can be obtained. . In addition, when the pressing of the operation unit against the operation surface is released, the operation tool returns from the allowable position to the prohibited position, so that the appearance of the power tool does not deteriorate.

[0046] In the switch mechanism of the power tool according to claim 7, can and Turkey replace the middle-member an auxiliary member. Therefore, it is possible to obtain a switch mechanism of another type of power tool simply by exchanging and removing parts without designing different products. That is, turning off the operation switch
The presence or absence of the switching prohibition mechanism can be selectively provided.
In the switch mechanism of the power tool according to claim 8, it is a Turkey to remove the lock member. Therefore, it is possible to obtain a switch mechanism of another type of power tool simply by exchanging and removing parts without designing different products. That is, it is possible to selectively provide a presence mechanism Onro' click.

[0047]

BEST MODE FOR CARRYING OUT THE INVENTION

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

A handle (handle) 2 is connected to the rear of the main body 30. A switch trigger (operation switch) 4 is provided on the lower surface of the handle portion 2. The switch trigger 4 is turned on by grasping and pushing the switch trigger 4, and the motor is driven to rotate the rotary grindstone 31.

A safety button (operation unit) 5 is provided on the handle upper surface (handle surface) 2M of the handle unit 2 to prevent the switch unit from being turned on unexpectedly. That is, in a normal state, the switch trigger 4 is in a state in which the switch trigger 4 cannot be pressed, and the switch trigger 4 can be pressed by pressing the safety button 5 to release the safety function.

Normally, 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 pressed down and the switch trigger 4 is pressed down, the safety button 5 is turned on, and the rotating grindstone 31 rotates. When the safety button 5 is released from being pressed, it returns immediately. The safety button 5
A protrusion 5T is formed on the surface of the device to prevent 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 stops. On the other hand, if the safety button 5 is pressed down to push the switch trigger 4 into the ON state, and then the safety button 5 is further pressed down, the ON state is established.

That is, after that, even if the switch trigger 4 is released, the on state is maintained, and the rotating grindstone 31 continues to rotate. In this case as well, the safety button 5 returns as soon as the pressing of the safety button 5 is released. To release the on-lock state, the switch trigger 4 is again grasped and pushed further. As a result, the switch trigger 4 returns to the off state, and the rotation of the rotary grindstone 31 stops.

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

The switch trigger 4 is held by the handle portion 2 so as to be rotatable in the directions of arrows 90 and 91 about the trigger shaft 4J, and is always urged in the direction of arrow 91.
A trigger engagement 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 in response to the rotation of the switch trigger 4 in the direction of the arrow 90.
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 (urging unit) 11 in the direction of arrow 101, that is, in the direction of pushing up and returning the safety button 5 in the direction of arrow 94.

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

In the off state shown in FIG.
0 receives the bias of the coil spring 63 and the safety pin 9
Has been rotated in the direction of the arrow 90 to a position where it comes into contact with. FIG. 3 shows a state in which the switch trigger 4 is pushed in the direction of the arrow 90 in this state. As shown in FIG. 3, the safety engaging portion 61 of the rotating claw 60 is located on the trajectory of the rotation of the trigger engaging portion 64 of the switch trigger 4 in the direction of the 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 rotate further in the direction of the arrow 90. As a result, an unexpected ON state is prevented. In the present embodiment, the safety engaging portion 61 is directly engaged with the trigger engaging portion 64, but may be indirectly engaged via another member, for example.

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 has turned to the limit position in the direction of the arrow 94. That is, as shown in FIGS. 2 and 3,
The surface of the safety button 5 is not recessed from the handle upper surface 2M, but is located substantially on the same plane as the handle upper surface 2M.

When the motor is driven to start rotating the grindstone 31, the safety button 5 is pressed in the direction of arrow 95. In response to the pressing of the safety button 5, the safety pin 9 moves in the direction of arrow 100 as shown in FIG.
The rotating claw 60 is pressed. Thus, the rotating claw 60 rotates in the direction of the 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 track of the rotation of the trigger engaging portion 64 of the switch trigger 4 in the direction of arrow 90. Get off. Therefore, the safety engagement portion 61 and the trigger engagement portion 64 are not engaged, and the switch trigger 4 can be pushed in the direction of the 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
Since the rotary claw 60 is in contact with the trigger engaging portion 64 of the switch trigger 4, it cannot return to the position shown in FIGS. However, safety pin 9 is spring 1
Because of being urged by 1, it returns in the direction of arrow 101 independently of the rotating claw 60.

For this reason, the safety button 5 is returned in the direction of the arrow 94 at the same time when the press on 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 continue to be recessed in the direction of the arrow 95.

When the switch trigger 4 is depressed, the switch body 6 is turned on as described above, the motor is driven, and the rotating grindstone 31 starts rotating. 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. By the return of the switch trigger 4, the rotating claw 60 also returns in the direction of the arrow 90.

Here, the trigger shaft 4J of the switch trigger 4 and the turning claw shaft 60J of the turning claw 60 are positioned substantially in parallel. Therefore, the switch trigger 4 is turned to the arrow 9
With respect to a plane (rotation plane) that rotates in the directions 0 and 91, the rotation claw 60 rotates in the directions of arrows 90 and 91 along substantially the same plane.

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 return operation of the rotary claw 60 in the direction of the arrow 90 causes the switch to rotate. The smoothness of the return operation of the trigger 4 in the direction of the arrow 91 is not hindered, and a switch mechanism of the power 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 when the above-mentioned 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 the 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 the rotation of the lock engaging portion 65 in the direction of the arrow 91 (see FIG. 5). . For this reason, when the switch trigger 4 is released, the lock engagement portion 62 is engaged with the lock engagement portion 65, and the switch trigger 4 is prevented from returning in the direction of 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 the present embodiment, the lock engagement portion 62 is directly engaged with the lock engagement portion 65, but may be indirectly engaged via another member, for example.

In the on-lock state shown in FIGS. 5 and 6, the rotating claw 60 cannot return in the direction of the arrow 90. However, since the safety pin 9 is biased by the spring 11, the safety pin 9 returns in the direction of the arrow 101 independently of the rotating claw 60. For this reason, the safety button 5 returns to the direction of the arrow 94 at the same time when the press on the safety button 5 is released. Thus, even in the on-lock state, the surface of the safety button 5 is located on substantially the same plane as the handle upper surface 2M, and the safety button 5 is
It does not persist in a recessed direction.

To release the on-lock state, the switch trigger 4 is further squeezed and turned in the direction of the arrow 90 (see FIG. 7). By this, switch trigger 4
Is disengaged from the lock engaging portion 65 of the rotating claw 60 and the rotating claw 60 is rotated in the direction of the arrow 90 by the bias of the spring 63 to return.

As described above, with respect to the plane on which the switch trigger 4 rotates in the directions of arrows 90 and 91, the rotating 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 the arrow 91 is not impaired by the return operation of the rotating claw 60 in the direction of the arrow 90, and the switch mechanism of the power tool having excellent operability is not affected. Obtainable.

In the off state shown in FIGS. 2 and 3, the position of the switch trigger 4 is the off position, the position of the safety button 5 is the prohibition position, and the position of the rotating claw 60 is the prohibition position. 4, the position of the switch trigger 4 in the ON state 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 of the power tool according to the present invention will be described with reference to FIG. As shown in FIG. 8, in the present embodiment, a rotating claw 80 is provided instead of the rotating claw 60 shown in the first embodiment. The rotating claw 80 has the safety engagement portion 6 provided in the rotating claw 60 of the first embodiment.
1 (FIG. 2) is not provided.

Further, similarly to 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 directions 0 and 91, and is urged in the direction of arrow 90 by a coil spring 63. A lock engaging portion 82 is provided integrally with the rotating claw 80.

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

Since the rotating claw 80 is integrally provided with the lock engaging portion 82 similarly to the rotating claw 60 of the first embodiment, the switch mechanism of the power tool according to the present embodiment is turned on. Has a lock function. Switch trigger 4
Is squeezed in the direction of the arrow 90, the safety button 5 is pressed deeply in the direction of the arrow 95, and the rotating claw 80 is rotated through the safety pin 9 in the direction of the arrow 95. It can be engaged with the lock engagement portion 65 of the trigger 4 (see FIGS. 5 and 6).

The structure other than the rotary claw 80 is the same as that of the first embodiment. For this reason, the grinder shown in the first embodiment can be changed to the grinder shown in the present embodiment only by replacing the rotating claws 60 shown in the first embodiment with the rotating claws 80 in the present embodiment. it can. That is,
By simply exchanging parts, the presence or absence of a safety mechanism can be selectively provided, and another model can be obtained without performing a different product design.

[Third Embodiment] A third embodiment of the switch mechanism of the 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 claw 85 is used instead of the rotating claw 60 shown in the first embodiment.
Is provided. The rotating claw 85 is not provided with the lock engaging portion 62 (FIG. 2) provided in the rotating claw 60 of the first embodiment.

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

A safety engaging portion 86 is provided on the rotating claw 85.
Since FIG. 2 is formed, the switch mechanism of the power tool in the present embodiment is similar to that of the first embodiment.
It has a safety function. When the switch trigger 4 is squeezed 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 further rotate in the direction of the arrow 90. No (see FIG. 3). As a result, an unexpected ON state is prevented.

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 power tool according to the present embodiment. That is, the lock engagement portion 65 of the switch trigger 4
Is not provided on the rotary claw 85, so that when the switch trigger 4 is released, the switch trigger 4 always returns in the direction of arrow 91 immediately.

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

[Fourth Embodiment] Next, a fourth embodiment of the switch mechanism of the 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 in the directions of arrows 90 and 91 about the trigger shaft 4J, and is urged by the spring 16 in the direction of arrow 91. The tip of the switch trigger 4 is bent into an L-shape to form a trigger engaging portion 4G.

On the other hand, 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 held by a pin holding unit 10,
The spring 11 is urged in a direction indicated by an arrow 96, that is, a direction in which the safety button 5 is pushed up and returned in an arrow 94 direction.

The other end of the safety pin 9 is in contact with the corner of the safety claw (auxiliary member) 7. The safety pawl 7 is rotatable in the arrow 94 direction about the safety pawl shaft (centered shaft) 7J, is biased in the arrow 95 direction by the coil spring 12.

A locking claw (locking member) 8 is provided near the safety claw 7. This locking claw 8
Is rotatable in the directions of arrows 90 and 91 around the locking claw shaft (lock member center axis) 8J, and is urged by the spring 13 in the direction of arrow 91. Locking claw 8 is restricted part 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 claw 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. In the present embodiment, the safety claw 7 is directly engaged with the switch trigger 4, but may be indirectly engaged via another member, for example.

When the motor is driven to start rotating the grindstone 31, the safety button 5 is pressed in the direction of arrow 95. In response to the pressing of the safety button 5, the safety pin 9 moves in the direction of arrow 97 as shown in FIG.
The safety claw 7 is pressed. As a result, the safety claw 7 moves in the direction of the arrow 94 against the bias of the coil spring 12.
Rotate in the direction.

When the safety claw 7 rotates in the direction of the arrow 94, the safety claw engaging portion 7G of the safety claw 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 of FIG. 11 in which the switch trigger 4 is pushed in, the safety claw 7 is in contact with the trigger engagement portion 4G of the switch trigger 4, so that the safety claw 7 returns to the position shown in FIG. Can not.
However, since the safety pin 9 is biased by the spring 11, it returns independently in the direction of the arrow 96 by itself.

Therefore, the safety button 5 is returned in the direction of the arrow 94 at the same time when the press on 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 continue to be recessed in the direction of the arrow 95.

When the switch trigger 4 is depressed, the switch body 6 is turned on as described above, the motor is driven, and the rotating grindstone 31 starts rotating. 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. With the return of the switch trigger 4, the safety claw 7 also returns in the direction of the arrow 95.

Here, the trigger shaft 4J of the switch trigger 4 and the safety claw shaft 7J of the safety claw 7 are positioned substantially in parallel. Therefore, the safety claw 7 rotates in the directions of arrows 94 and 95 along a substantially same plane with respect to 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
The smoothness of the return operation of the switch trigger 4 in the direction of the arrow 91 is not impaired by the return operation in the five directions, and a switch mechanism of the power 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 when the above-mentioned ON state is set. When the safety button 5 is pressed, the safety pin 9 also moves in the direction of arrow 97, and the movement of the safety pin 9 causes the safety claw 7 to move from the position shown in FIG.
It rotates greatly in four directions.

As a result, the rotation pressing portion 7K of the safety claw 7 presses the locking claw 8 and rotates the locking claw 8 in the direction of the 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 with the path of rotation of the trigger engaging portion 4G of the switch trigger 4 in the direction of the arrow 91. . Thereafter, when the switch trigger 4 is released, the locking claw engaging portion 8G is engaged with the trigger engaging portion 4G, and the switch trigger 4 is prevented from returning in the direction of arrow 91.

Thus, the ON state of the switch trigger 4 is maintained, and the switch trigger 4 enters the ON locked state. In the present embodiment, the locking claw 8 is directly engaged with the switch trigger 4, but may be indirectly engaged via, for example, 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, it returns independently in the direction of the arrow 96 by itself. For this reason, the safety button 5 returns to the direction of the arrow 94 at the same time when the press on the safety button 5 is released. In the present embodiment, when the press on the safety button 5 is released in the on-lock state, the safety claw 7 rotates in the direction of the arrow 95 under the bias of the coil spring 12 and returns to the position shown in FIG. .

As described above, the safety pin 9 is connected to the spring 1
1, the surface of the safety button 5 is located substantially on the same plane as the handle upper surface 2M even in the on-lock state, and the safety button 5 remains depressed in the arrow 95 direction. It does not last in the state.

To release the on-lock state, the switch trigger 4 is further squeezed and turned in the direction of the arrow 90. As a result, the engagement between the end of the trigger engagement portion 4G of the switch trigger 4 and the locking claw engagement portion 8G of the locking claw 8 is released, and the switch trigger 4 is returned in the direction of arrow 91 by the bias of the spring 16. I do. Further, the safety claw 7 is rotated by the coil spring 12 in the direction of arrow 95 to return, and the locking claw 8 is rotated by the spring 13 in the direction of arrow 91 to return.

As described above, the safety claw 7 rotates in the directions of arrows 94 and 95 along the substantially same plane with respect to the plane in which the switch trigger 4 rotates in the directions of arrows 90 and 91. Also in this case, the smoothness of the return operation of the switch trigger 4 in the direction of the arrow 91 is not impaired by the return operation of the safety claw 7 in the direction of the arrow 95, and the switch mechanism of the power tool having excellent operability is not affected. 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 claw 7 is the prohibited position, and the position of the locking claw 8 is the unlock position. It 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 claw 7 is the allowable position, and the position of the locking claw 8 is the unlocked position similar to FIG. It is.

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 claw 7 is the on-lock position, and the position of the locking claw 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 motor is turned on and the rotating grindstone 31 is rotated, FIG.
The position of the switch trigger 4 shown in FIG. 2 is an ON position substantially similar to FIG.

[Fifth Embodiment] Next, a fifth embodiment of the switch mechanism of the power tool according to the present invention will be described with reference to FIGS.
4 will be described. The first embodiment and the fourth embodiment
In the embodiment, the safety function is provided in which the switch trigger 4 cannot be pushed into the ON state unless the safety button 5 is pressed, but this embodiment is not provided with this safety function.

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. Intermediate pawl 15 intermediate gripper shaft (centered shaft)
It is rotatable in the directions of arrows 94 and 95 around 15J,
It is urged in the direction of arrow 95 by the coil spring 12.

FIG. 13 shows the off state. From this state, the switch trigger 4 is turned on by squeezing and pushing it. When the switch trigger 4 is released, the switch trigger 4 immediately returns to the state shown in FIG. 13 and is turned off. Since the safety pin 9 is urged by the spring 11, the pressing of the safety button 5 is released and the safety button 5 returns in the direction of the arrow 94 at the same time. 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 continue to be recessed in the direction of the arrow 95.

When the safety button 5 is depressed after the switch trigger 4 is depressed and turned on, the safety pin 9 receives the depression of the safety button 5 and the safety pin 9 moves to the arrow 97.
, Whereby the intermediate claw 15 rotates in the direction of the arrow 94. Due to the rotation of the intermediate claw 15, the rotation pressing portion 15K of the intermediate claw 15 presses the locking claw 8 to rotate the locking claw 8 in the direction of the arrow 90, and the locking claw engaging portion 8G of the locking claw 8 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 switch trigger 4 enters the ON locked state.

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 urged by the spring 11, it returns independently in the direction of arrow 96. For this reason, the safety button 5 returns to the direction of the arrow 94 at the same time when the press on the safety button 5 is released. In this embodiment, when the press on the safety button 5 is released in the on-lock state, the intermediate claw 15 is
With the urging of, it turns in the direction of arrow 95 and returns.

As described above, the safety pin 9 is connected to the spring 1
1, the surface of the safety button 5 is located substantially on the same plane as the handle upper surface 2M even in the on-lock state, and the safety button 5 remains depressed in the arrow 95 direction. It does not last in the state.

To release the on-lock state, the switch trigger 4 is further squeezed and rotated in the direction of the arrow 90. Thus, the engagement between the end of the trigger engaging portion 4G of the switch trigger 4 and the locking claw engaging portion 8G of the locking claw 8 is released, and the locking claw 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 the present embodiment, the safety claw 7 in the fourth embodiment is replaced with the intermediate claw 1.
The only difference is that the 5 is replaced. Moreover, the safety claw shaft 7J of the safety claw 7 and the intermediate claw shaft 15J of the intermediate claw 15 are located at the same position.

For this reason, the safety claw 7 and the intermediate claw 1
The grinder shown in the fourth embodiment can be changed to the grinder shown in the present embodiment only by replacing the grinder 5 with the grinder. That is, only by exchanging parts, the presence or absence of the safety mechanism can be selectively provided, and another model can be obtained without performing a different product design.

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

[Other Embodiments] In the above embodiments, the grinder is exemplified as the 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 shape and mechanism of the switch trigger 4, safety button 5, safety pin 9, spring 11, rotating claw 60, safety claw 7, intermediate claw 15, locking claw 8, and other members exemplified in the above-described embodiments. Not limited to other shapes,
A mechanism may be employed.

In 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. Furthermore, the spring 11 constituted by a coil spring has been exemplified as the urging portion,
A leaf spring or the like may be employed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a grinder showing a first embodiment of a switch mechanism of a 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.

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

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

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

FIG. 10 is a fourth view of the switch mechanism of the power tool according to the present invention.
FIG. 6 is a side sectional view of a handle portion of the grinder according to the embodiment, showing an off state.

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

FIG. 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 view of the switch mechanism of the power tool according to the present invention.
FIG. 6 is a side sectional view of a handle portion of the grinder according to the embodiment, showing an off state.

FIG. 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 a 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 view showing an off state of a handle portion of the grinder shown in FIG. 16, wherein A is a side sectional view and B is shown in A.
It is arrow sectional drawing in the XVIIB-XVIIB direction.

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 shown in A.
It is arrow sectional drawing in the XVIIIB-XVIIIB direction.

[Explanation of symbols]

 2 Handle handle 2M Handle upper surface 4 Switch trigger 4G Trigger engagement section 5 Safety button 7 Safety Claw 7G ···· Safety claw engaging portion 8 ···· Locking claw 8G ····· Locking claw engaging portion 9 ····· Safety pin 11 ····· Spring 15 ····· Intermediate claw 60 ··· Rotating claw 61 ···· Safety engagement section 62 ··· Lock engagement section 64 ···· Trigger engagement section 65 ··· ..Lock engagement parts

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-328956 (JP, A) JP-A-2-303776 (JP, A) JP-A-3-68788 (JP, U) JP-A-60- 186182 (JP, U) Japanese Utility Model Sho 62-118328 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B25F 5/00

Claims (8)

(57) [Claims] An operation switch provided on a handle of an electric tool and switched to an off position or an on position, and an operation unit provided on a handle of the electric tool and having an operation surface for receiving pressure. The operation surface is switched to a prohibited position where the operation surface is substantially on the same plane as the handle portion surface of the handle portion, or to an allowable position where the operation surface is depressed from the handle portion surface toward the inside of the handle portion by being pressed. A switch mechanism of a power tool, comprising: an operating unit that is operated, and an urging unit that constantly urges the operating unit toward the prohibited position, wherein the operating unit is in the allowable position only when pressed against the operation surface. When the pressing is released, the operation unit is urged by the urging unit and returns from the allowable position to the prohibited position. When the operation unit 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. An operation switch provided on a handle portion of the power tool and switched to an off position or an on position; and an operation portion provided on the handle portion of the power tool and having an operation surface for receiving pressure. A prohibition position in which the operation surface is located substantially on the same plane as the handle portion of the handle portion; an allowable position in which the operation surface is recessed from the handle portion surface toward the inside of the handle portion by receiving the pressure; or An operating part that is switched to an on-lock position in which the operating surface is further depressed toward the inside of the handle part by receiving the operating part; an urging part that constantly urges the operating part toward the prohibiting position; A rotation member that is switched to a prohibited position, an allowed position, or an on-lock position by rotating about a center, and switches between the prohibited position, the allowed position, or the on-lock position of the operation unit. A rotating member that is switched in response to an operation, wherein the operating portion is in the allowable position or the on-lock position only when the operating portion is being pressed, and the pressing is released. when in operation unit receives the urging by the urging unit, and returned to inhibition position from the allowable position or on-lock position independently rotating member, when in the inhibition position, the operating switches at the oFF position When the turning member is in the allowable position, the engagement with the operating switch is released and the operating switch is turned from the off position to the on position. and switchable, rotating member, when in the on-lock position, engages the activation switch located at the oN position the actuating switch from oN position impossible switched off position A switch mechanism for a power tool. 3. An operation switch provided on a handle portion of the power tool and switched to an off position or an on position, and an operation portion provided on the handle portion of the power tool and having an operation surface for receiving pressure. A prohibition position in which the operation surface is located substantially on the same plane as the handle portion of the handle portion; an allowable position in which the operation surface is recessed from the handle portion surface toward the inside of the handle portion by receiving the pressure; or The operating part is switched to an on-lock position where the operating surface is further depressed toward the inside of the handle part by receiving the operating part, an urging part that constantly urges the operating part toward the prohibiting position, and an auxiliary member central shaft. An auxiliary member that can be switched to a prohibited position, an allowed position, or an on-lock position by rotating about An auxiliary member that is switched in response to a change operation; and a lock member that is switched to an unlocked position or an on-lock position by rotating about a central axis of the lock member, wherein the auxiliary member is at a prohibited position and an allowed position. A lock member that is in a non-locking position and that is rotated in response to switching of the auxiliary member from the allowable position to the on-lock position and is switched from the unlocked position to the on-lock position. The operating unit 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 unit is urged by the urging unit and independently operates in the allowable position or the on-lock position. returned to inhibition position from the oN lock position, the auxiliary member when in the inhibition position, the actuation switch off position in engagement with the work dynamic switch When the auxiliary member is at the allowable position, the auxiliary member is disengaged from the operation switch and the operation switch can be switched from the off position to the on position. on one occasion, it engages the work dynamic switch impossible switched off position the operation switch from the on position, the locking member, when in the unlocked position, and is released of engagement with the actuating switch the operating switch A switch mechanism for a power tool, wherein the switch mechanism can be switched from an on position to an off position. 4. The switch mechanism for an electric power tool according to claim 2, wherein the operation switch is switched to an off position or an on position by rotating along a predetermined rotation plane. A switch mechanism for a power tool, wherein the rotation member or the auxiliary member rotates along a plane substantially the same as the rotation plane. 5. An operation switch provided on a handle portion of the power tool and switched to an off position or an on position, and an operation portion provided on the handle portion of the power tool and having an operation surface for receiving pressure. An unlocked position in which the operation surface is located substantially on the same plane as the handle portion surface of the handle portion, or an on-lock position in which the operation surface is depressed from the handle portion surface toward the inside of the handle portion by being pressed. A biasing portion that constantly biases the operating portion toward the unlocked position; and an intermediate member that is switched to the unlocked position or the on-lock position by rotating about the intermediate member central axis. The intermediate member, which is rotated and switched in accordance with the switching operation of the operating portion between the unlocked position and the on-lock position, is rotated around the central axis of the locking member. A lock member that is switched to a non-lock position or an on-lock position, and a lock member that is switched in response to a switching operation of the intermediate member between the unlock position and the on-lock position. The operation unit is in the on-lock position only when it is pressed against the operation surface, and when the press is released, the operation unit is urged by the urging unit and independently from the on-lock position to the unlock position. returns to the locking member, when in the on-lock position, engages the work dynamic switch impossible switched off position the operation switch from the on position, the locking member, when in the unlocked position, actuating switch A switch mechanism of the power tool, wherein the switch is disengaged from the switch and the operation switch can be switched from the on position to the off position. 6. An operation switch provided on a handle portion of the power tool and switched to an off position or an on position, and an operation portion provided on the handle portion of the power tool and having an operation surface for receiving pressure. The operation surface is switched to a prohibited position where the operation surface is substantially on the same plane as the handle portion surface of the handle portion, or to an allowable position where the operation surface is depressed from the handle portion surface toward the inside of the handle portion by being pressed. An operating unit, an urging unit that constantly urges the operating unit toward the prohibited position, and an auxiliary member that is switched to the prohibited position or the allowable position by rotating about the auxiliary member center axis. An auxiliary member that is switched in response to the switching operation of the prohibited position or the allowable position, wherein the operation unit is pressed against the operation surface. Only there the allowable position, when the pressing is released, the operation unit receives the urging by the urging unit, and returned to inhibition position from the allowable position independently assisting member, when in the inhibition position, create dynamic Engagement with the switch disables the operation switch from the off position to the on position. When the auxiliary member is at the allowable position, the auxiliary member is disengaged from the operation switch and moves the operation switch from the off position to the on position. A switch mechanism for a power tool, wherein the switch mechanism is switchable. 7. The power tool is provided on a handle of the power tool.
An operation switch that is switched to the off position or the on position, and an operation switch that is provided on the handle of the power tool and receives pressure.
An operation unit having a work surface, wherein the operation surface is
Do not press the prohibition position, which is located on the
The operating surface is moved from the handle by the handle.
Allowed position recessed toward the inside of the part, or subjected to pressure
The operating surface is further moved from the allowable position
Operation to switch to the on-lock position recessed toward the part
The urging unit always urges the unit and the operation unit toward the prohibition position, and the prohibition position and the permissible position by rotating around the central axis.
Auxiliary member that can be switched to the
The operation unit's prohibition position, allowable position, or on-lock position.
An auxiliary member that is switched in response to the switching operation of the position, the auxiliary member is replaceable with respect to the central axis, and
By pivoting about the mandrel, the unlocked position or
An intermediate member that can be switched to the on-lock position.
Prohibition position or allowable position of working part, or on-lock position
Can be rotated and switched in response to the
During members, non-locked by rotating around the locking member central axis
Lock section that can be switched to the lock position or on-lock position
Wood, a switch mechanism of the power tool equipped with, when the auxiliary member is provided, the locking member, complement
Unlocked position when the auxiliary member is in the prohibited position and the permitted position
From the allowable position of the auxiliary member to the on-lock position.
Rotates in response to the switch to
When the lock member is switched to the lock position and the intermediate member is provided, the lock member is
Switching between the unlocked position and the on -lock position of the intermediate member
The operation switch is turned in accordance with an operation , and the operation switch is turned along a predetermined turning plane.
Switch to the off or on position.
The auxiliary member has a substantially same plane as the rotation plane.
Swivels up and controls are only allowed when pressed against control surface
Position or on-lock position, and the pressure is released.
The operation unit is biased by the biasing unit and
When the auxiliary member returns to the prohibited position from the locked position or the on-lock position and is in the prohibited position , the auxiliary member engages with 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 member
The operation switch is released from the off position to the on position
When the lock member is in the on-lock position, the operation switch
Switch from the on position to the off position.
When the lock member is in the unlocked position, the operation switch
Is disengaged and the operation switch is turned on from the on position.
A switch mechanism for the power tool, wherein the switch mechanism can be switched to a power position . 8. A power tool provided on a handle of the power tool.
An operation switch that is switched to the off position or the on position, and an operation switch that is provided on the handle of the power tool and receives pressure.
An operation unit having a work surface, wherein the operation surface is
Do not press the prohibition position, which is located on the
The operating surface is moved from the handle by the handle.
Allowed position recessed toward the inside of the part, or subjected to pressure
The operating surface is further moved from the allowable position
Operation to switch to the on-lock position recessed toward the part
The urging unit always urges the unit and the operation unit toward the prohibition position, and the prohibition position by rotating around the center axis of the auxiliary member.
Position, the allowable position or the on-lock position.
An auxiliary member, which is a prohibited position, an allowable position, or an
Can be switched in response to the unlocked position switching operation
The non-locking is performed by rotating the auxiliary member and the locking member around the center axis.
Lock portion is switched to the click position or Onro' click position
The auxiliary member is in a forbidden position and an allowed position.
When in the unlocked position and the permissible position of the auxiliary member
Is turned from the
Lock section that can be switched from the lock position to the on-lock position
Wood, a switch mechanism of the power tool equipped with the activation switch, to rotate along a predetermined rotation plane
Switch to the off or on position.
The auxiliary member has a substantially same plane as the rotation plane.
Swivels up and controls are only allowed when pressed against control surface
Position or on-lock position, and the pressure is released.
The operation unit is biased by the biasing unit and
When the auxiliary member returns to the prohibited position from the locked position or the on-lock position and is in the prohibited position , the auxiliary member engages with 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 member
The operation switch is released from the off position to the on position
When the lock member is in the on-lock position, the operation switch
Switch from the on position to the off position.
When the lock member is in the unlocked position, the operation switch
Is disengaged and the operation switch is turned on from the on position.
A switch mechanism for a power tool, wherein the switch mechanism can be switched to a lock position, and the lock member can be removed .