JPH0426988B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a fixing structure for an auxiliary handle attached to a power tool in order to improve the usability of the power tool.

[Background Art] Conventionally, as shown in FIG. 11, in a power tool A' such as an electric drill, an electric screwdriver, or an electric hammer drill, a tool body 2 is attached to the front part of the tool body 2' which has a main handle 1'. Some models have an auxiliary handle 3' attached to prevent them from steadying.
As shown in FIG. 12, this auxiliary handle 3' is comprised of a tightening band 4' made of a flexible member such as metal, an auxiliary handle base 16', a bolt a, a nut b, and a grip portion 18'. The nut b is built into and fixed to the upper part of the grip part 18', and by rotating the grip part 18', the nut b is also rotated at the same time, and the bolt a screwed into the nut b can be tightened or loosened. It is made possible to do so.
When this grip part 18' is rotated in the direction to tighten the bolt a, it is attached to the lower end of the tightening band 4' and the bolt a is drawn toward the grip part 18', and the tightening band 4' is attached to the lower end of the tightening band 4'. When pulled into the recess c of the base 16', the tightening band 4' tightens the tool body 2', and the auxiliary handle 3' is fixed to the tool body 2'. When changing the direction of the auxiliary handle 3', rotate the grip part 18' several times in the direction of loosening the bolt a, loosen the tightening band 4', and place it in a convenient position with the longitudinal direction of the tool body 2' as the axis. Rotate and tighten the grip part 18' again to fix it to the tool body 2'. However, in the conventional example described above, it is necessary to rotate the auxiliary handle 3' several times in order to loosen the auxiliary handle 3', and the auxiliary handle 3' must be rotated several times in order to loosen the auxiliary handle 3'. In the case of a device in which the position of the auxiliary handle 3' can be changed, it takes time and effort to rotate the auxiliary handle 3', making it difficult to use, and the user often feels uncomfortable.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to provide an auxiliary handle for a power tool that is easy to use.

[Disclosure of the Invention] The auxiliary handle of the power tool of the present invention is a power tool A in which an auxiliary handle 3 is provided on a tool body 2 that includes a built-in motor and a grip portion 1 for holding by hand.
, the front part of the tool body 2 is inserted into the ring part 4 at the top of the auxiliary handle 3, the auxiliary handle 3 is inserted into the tool body 2, and the ring part 4 is attached to the ring part 4 through the elastic piece 5. 2, a rotating shaft 8 of the operating lever 7 is rotatably mounted below the ring portion 4, and the above-mentioned pressing force is applied to the rotating shaft 8 by rotating the operating lever 7. This tool is characterized by being provided with a protrusion 9 that presses the piece 6 to fix the ring part 4 to the tool body 2, and by configuring it as described above, the drawbacks of the conventional example are solved. . In other words, by configuring as described above, the auxiliary handle 3 can be freely rotated and fixed relative to the tool body 2 by one-touch operation of the operating lever 7, and the auxiliary handle 3 can be assisted according to the work content and work space. The position of the handle 3 can be easily rotated, and the auxiliary handle 3 can be reliably fixed to the tool body 2.

The present invention will be explained in detail below with reference to Examples.

As shown in FIG. 1, the front end of the tool body 2 has a chuck portion 10 for attaching a rotating shaft of a drill, screwdriver, etc. when the tool body 2 is used as an electric drill, electric screwdriver, or electric hammer drill.
A main handle 11 is formed at the lower part of the rear end and serves as a grip part 1 when holding the tool body 2. A storage chamber 13 for a storage battery is provided integrally with the tool body 2 in front of the main handle 11 via a handle space 12, and an auxiliary grip 14 is provided integrally with the storage chamber 13 at the front end of the storage chamber 13. A switch 15 for controlling the rotation of the motor built in the tool body 2 is provided on the upper front side of the main handle 11, and the switch 15 can be operated with the hand holding the main handle 11. An auxiliary handle 3 is provided at the rear of the chuck part 10 to prevent the tool body 2 from shaking during operation when the power tool A is used. As shown in FIGS. 3 and 4, the auxiliary handle 3 is connected to a collar portion 17 via an annular ring portion 4 at the top, a pressing piece 6 provided at the bottom of the ring portion 4, and a base portion 16 below the pressing piece 6. and a grip portion 18, which are integrally molded from synthetic resin. This ring portion 4 is inserted into the front part of the tool body 2, and the auxiliary handle 3 is inserted into the front part of the tool body 2.
The pressing piece 6 is pressed against the ring part 4 by the elastic piece 5.
It is integrally formed at the bottom of the. Reference numeral 7 indicates an operating lever, and this operating lever 7 is composed of a rotating shaft 8 rotatably attached to a through hole 19 provided in the base portion 16 and a holding piece 21. A retaining ring 22 attached to the end prevents the rotating shaft 8 from coming off. As shown in FIG. 5, a protrusion 9 protruding outward is provided on the outer peripheral surface of the rotating shaft 8, and by rotating the rotating shaft 8, the protrusion 9 presses the lower end of the pressing piece 6. The pressing piece 6 is pushed up toward the center of the ring portion 4. At this time, by pushing down the operating lever 7 as shown in the direction of the arrow B in FIG. 3 and rotating it to the position shown in the imaginary line, the protrusion 9 no longer faces the pressing piece 6 as shown in FIG. The pressing piece 6 is moved to the position shown by the imaginary line by the elastic force of the elastic piece 5. That is, the third
By pushing down the operating lever 7 as shown in the direction of the arrow B in the figure, the pressing piece 6 becomes separated from the tool body 2 as shown in FIG. 6, and the auxiliary handle 3 becomes freely rotatable with respect to the tool body 2. Become.
Then, while keeping the auxiliary handle 3 in a rotatable state, for example, rotate it to an arbitrary position as shown in FIG. The pressing piece 6 moved by the rotation of the operating lever 7 presses the tool body 2, and the auxiliary handle 3 is fixed to the tool body 2. The rotation angle of the operating lever 7 is 90 degrees or less, and therefore, one-touch operation of the operating lever 7 allows the auxiliary handle 3 to
can be fixed to the tool body 2 or rotated.

8 to 10 show a second embodiment of the present invention, in which an auxiliary handle 3 is provided at an upper annular elastic body 4a serving as a ring portion 4, an operation lever 7 provided at a lower part of the annular elastic body 4a, and a base portion 16. and a grip portion 18. The annular elastic body 4a has one end 4b extending from the base 16 and the other end 4c extending from the base 1.
6, and this annular elastic body 4a has elasticity. The grip portion 18, the base portion 16, and the annular elastic body 4a are integrally molded from synthetic resin, and the base portion 16 of the annular elastic body 4a
A through hole 19 is provided in the facing portion of the other end portion 4c which is further away from the base portion 16, and a rotation shaft 8 having a cam-shaped cross section is rotatably inserted into the through hole 19. It has been done. This rotating shaft 8 is formed with a part of the shaft cut out, and a cam is provided on the rotating shaft 8, and a projection 9 is provided for pressing the pressing piece 6 with the cam.
has been formed. Then, the protrusion 9 of this rotation shaft 8
The annular elastic body 4a is pressed in the direction a shown by the arrow in FIG. When the operating lever 7 is rotated in two directions as shown in FIG. 9, the notched short diameter side of the rotation shaft 8 connects with the other end 4c of the annular elastic body 4a, as shown in the imaginary line in FIG. Because they face each other, a gap is created between the two members, and the annular elastic body 4c is not pressed in the direction a. That is, by rotating the operating lever 7 in the two directions shown in FIG. 9, the fixation of the auxiliary handle 3 is released, and by rotating the operating lever 7 in the c direction shown in FIG. The auxiliary handle 3 is fixed. Here, when the front part of the tool body 2, which has a diameter slightly smaller than the annular part 23, is inserted into the annular part 23 constituted by the annular elastic body 4a, the auxiliary handle 3 is fixed to the tool body 2 by rotating the operating lever 7. It can be removed from the tool body 2. Furthermore, since the parts constituting the auxiliary handle 3 are integrally molded from synthetic resin, they are very inexpensive and their performance is highly reliable.

[Effects of the Invention] Since the present invention is configured as described above, the ring part can be fixed to the tool body by pressing the pressing piece by rotating the operating lever, and the auxiliary handle can be fixed by one-touch operation of the operating lever. The auxiliary handle can be rotated or fixed relative to the tool body, making it easy to change the position of the auxiliary handle depending on the work content and work space of the power tool, as well as ensuring that the auxiliary handle is attached to the tool body. It can be fixed.

[Brief explanation of drawings]

FIG. 1 is a side view of a power tool according to an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a front view of the auxiliary handle of the same, FIG. 4 is a side view of the same, and FIG.
Figure 6 is a sectional view showing the operating state of the same as above, and Figure 7 is a sectional view showing the operating state of the same as above.
The figure is a front view with the auxiliary handle rotated 90 degrees.
Fig. 8 is a sectional view showing another embodiment of the auxiliary handle, Fig. 9 is a front view of the same as above, Fig. 10 is a sectional view showing the operating state of the same as above, and Fig. 11 is a side view of a conventional power tool. , FIG. 12 is a cross-sectional view of the same auxiliary handle as above, where A is a power tool, 1 is a grip part, 2 is a tool body, 3 is an auxiliary handle, 4 is a ring part, and 5 is a sectional view of the auxiliary handle.
6 is an elastic piece, 6 is a pressing piece, 7 is an operating lever, 8 is a rotating shaft, and 9 is a protrusion.

Claims (1)

[Scope of Claims] 1. In a power tool in which an auxiliary handle is provided on a tool body that includes a built-in motor and a grip portion for holding by hand, the front part of the tool body is inserted into the ring portion at the top of the auxiliary handle. Then, the auxiliary handle is inserted into the tool body, a pressing piece is provided on the ring part to fix the ring part to the tool body via an elastic piece, and the rotation axis of the operating lever can be freely rotated below the ring part. An auxiliary handle for a power tool, characterized in that the rotation shaft is provided with a protrusion that presses the pressing piece and fixes the ring portion to the tool body by rotating an operating lever. 2. The auxiliary handle for a power tool according to claim 1, characterized in that the auxiliary handle, the ring portion, the elastic piece, and the pressing piece are integrally molded from synthetic resin. 3. The auxiliary handle for a power tool according to claim 1, characterized in that a cam is provided on the rotating shaft and a protrusion is formed for pressing the pressing piece with the cam.