JPS6252682B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a battery powered power tool such as a circular saw.

In general, battery-powered power tools with blades such as circular saws, jigsaws, and planes have a built-in power source, so they can be used when they are not intended for cutting, such as when taking them out of a tool box or changing blades. too,
If you touch the switch by mistake or something else hits it, it may operate unexpectedly. It's fine as long as it's a safe tool that doesn't harm the human body, but power tools are extremely dangerous as they can cut your fingers or injure your feet.

1 to 4 show a conventional power tool A, where 4 is a main body and a main body housing 8 is shown.
It houses a motor 9, a rotatable tooth-mounted shaft 10, a rechargeable battery, etc. Although the battery is not shown, it is delivered into and out of the battery storage section 11 shown in FIG. 2 at will. Further, the tooth mounting shaft 10 is driven by a motor 9 via gears 12 and 13.

A handle 3 is formed integrally with the main body housing 8, and has a substantially U-shape having connecting parts 2 on both sides of a central grip part 1. A switch 5 for turning off the power to the motor 9 is built into the end of the grip 1 on the index finger side, and a switch handle 6 of the switch 5 protrudes from the end of the inner periphery of the grip 1 on the index finger side. A locking means 14 for locking the switch handle 6 in the OFF state is built into the connecting portion 2 on the index finger side, and a slidable lock button 7 is provided at an angle on the surface.
That is, the lock button 7 is provided ahead of the front end A of the switch handle 6. The switch 5 is turned on by pushing the switch handle 6, and when pushed again, it is protruded and turned off. or,
The locking means 14 includes a stopper 16 that is slidably regulated by a rail 15 so as to protrude or retract toward the back side of the switch handle 6, and is slidably fitted onto a shaft portion 17 of the stopper 16, and is integrated with the lock button 7. It consists of a cylindrical portion 18 formed therein.

However, when power tool A is not used,
By sliding the lock button 7 toward the switch 5 and locking the switch handle 6 as shown in FIG. 3, it is possible to prevent the switch 5 from being accidentally turned on and the power tool A from operating. Also, when using
As shown in Figure 2, grip the handle 3, put your index finger on the switch handle 6, extend your thumb toward the lock button 7, press the lock button 7, and slide it to the opposite side of the switch 5 to release the lock. If the switch handle 6 is pushed in with the index finger as shown in the figure, the power will be turned on.

19 is a replaceable nut 2 at the end of the tooth mounting shaft 10.
This is a circular saw that is tightened at 0, and the upper part of the circular saw 19 is covered by a safety cover 22 that is attached to the main body housing 8 with screws 21. Further, the lower part of the circular saw 19 can be covered with a movable safety cover 23, which can be opened and closed by holding a knob 24 and rotating it. 25
is a surface plate for facing the object to be cut, such as wood or a board, and is attached to the lower surface of the main body 4, and the circular saw 19 protrudes from the lower surface of the surface plate 25.

In the case of such a conventional example, it is necessary to slide the lock button 7 with the thumb to release the locking means 14 while holding the handle 3, and therefore, the sliding operation while holding the handle 3 is inevitably difficult. This resulted in a problem of poor operability.

The present invention has been provided in view of the above-mentioned points, and is aimed at a battery-powered power tool that can be smoothly and easily locked and unlocked with the thumb while holding the power tool with one hand and gripping the handle. It provides:

Embodiments of the present invention will be described in detail below with reference to the drawings. 5 and 6 show the power tool A of this embodiment, and the parts other than the locking means are the same as those of the conventional example, and the description of the similar parts is omitted, and the details of the locking means are shown. Explain. A lock handle 26 is provided at the top of the handle 3, and is located on the outer periphery of the opposite side of the switch handle 6. The lock handle 26 is rotated by a shaft 27 located outside the handle 3. It is pivoted for free movement. The lock handle 26 is integrally formed with a projecting piece-shaped operating part 31 that protrudes upward or outward from the tip of the grip part 1 at the rear of the shaft 27, and when the operating part 31 is operated, the lock handle 26 is moved outward. Rotate so that it sticks out. 28 engages with the inner surface of the switch handle 6 and
This lock button 28 is formed into a substantially L-shape, with one end that can be freely engaged with the switch handle 6 as described above, and the other end that is circularly attached to the bottom of the lock handle 26. It engages with a guide hole 29 formed in an arc shape, and this hole 29 and the other end of the lock button 28 are movable relative to each other. Small click protrusions 30 are protruded from the upper and lower parts of the inner surface of the hole 29, respectively. That is, it is used for clicking the lock handle 26 in two states: a locked state and a released state. By rotating the lock handle 26, the lock button 28, which is engaged with the arcuate hole 29, passes through the protrusion 30 and clicks, moving inside the hole 29 and arranging the switch 5. It moves linearly within the insertion hole 33 of the mounting piece 32.

However, when power tool A is not used,
As shown in FIG. 5, if the lock handle 26 is tilted toward the grip portion 1 and the switch handle 6 is locked, there is no possibility that the switch 5 will be accidentally turned on and the power tool A will operate. When using it, grip the handle 3, put your index finger on the switch handle 6, and use your thumb to lock the lock handle 26.
When the operating section 31 of the lock handle 2 is tilted outward, the lock handle 2
6 rotates to pull the lock button 28 into the insertion hole 33 as shown in FIG. 6 and disengage it from the switch handle 6. The locking piece 34 of the lock handle 26 locks onto the end of the grip 1 to restrict movement. At this time, since the lock handle 26 is operated through the arc-shaped hole 29, it can be operated with light force on the principle of leverage. Furthermore, during use, the lock handle 26 does not move due to vibrations since the projection 30 is clicked. Next, when you want to stop using the switch handle 6, the switch handle 6 will return to its original position once you stop pressing the switch handle 6.
6 rotates, and the switch handle 6 is locked with the lock button 28.

As described above, the present invention provides a main body with a substantially U-shaped handle having connecting parts on both sides of the grip, a switch handle of a switch on the end of the inner periphery of the grip on the index finger side, and operation of the switch handle. A lock handle is provided on the outer periphery of the grip section opposite to the switch handle, and the operation section of the lock handle projects outward from the tip of the grip section, and the lock handle is attached to the grip section in front of the operation section. Since the power tool is rotatably supported on a shaft, you can easily turn the switch with your index finger while holding the power tool with one hand, and you can operate the lock handle with your thumb while holding the handle with one hand. By operating the lock handle in the direction of rotation, you can smoothly lock and release the lock by rotating the lock handle, which has the effect of improving operability compared to the conventional sliding lock means. play. Moreover, since the lock handle is provided on the outer periphery of the grip, which is the opposite side of the switch handle,
Whether the user is right-handed or left-handed, the lock handle can be operated with the thumb while holding the handle with one hand, making it easy to use.Also, the lock handle can be locked when not in use. Even if the power tool is battery operated, there is no possibility of accidentally turning on the power tool. Furthermore, the switch can be unlocked by rotating the lock handle forward with the thumb of the hand that is gripping the handle using the operating part. Since the lock handle is projected outward and rotatably supported on the grip part in front of the operating part, the rotation locus of the lock handle is close to the line of motion of the thumb, making it easier to operate the lock handle. It can be done smoothly and has good operability.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional power tool, Fig. 2 is an explanatory diagram of the same usage state, Fig. 3 is a partial sectional view of the handle when the above switch is locked, and Fig. 4 is a partial cross-sectional view of the handle when the same above is unlocked. FIG. 5 is a partial cross-sectional view of the handle, FIG. 5 is a cross-sectional view showing the embodiment of the present invention in the locked state, and FIG. 6 is a cross-sectional view showing the same in the released state. 1 is a grip part, 2 is a connecting part, 3 is a handle, 4 is a main body, 5 is a switch, 6 is a switch handle, 2
6 is the lock handle, 28 is the lock button, 29
indicates a hole, and 31 indicates an operating section.

Claims (1)

[Scope of Claims] 1. A substantially U-shaped handle having connecting parts on both sides of the grip is provided on the main body, and a switch handle of a switch is provided at the end of the inner periphery of the grip on the index finger side, and the switch handle can be operated. A lock handle to prevent this is provided on the outer periphery of the grip portion on the opposite side of the switch handle, and the operating portion of the lock handle protrudes outward from the tip of the grip portion, and the lock handle is attached to the grip portion in front of the operating portion. A battery-powered power tool that is rotatably supported on a shaft. 2. In the arc-shaped hole formed in the lock handle,
2. The battery-powered power tool according to claim 1, further comprising a movably mounted lock button for preventing operation of the switch handle.