JPH0333433Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a switch device for turning on and off a drive switch in a power tool such as a polishing machine.

(Prior Art) In conventional power tools, a switch or a switch operating mechanism is attached to the tool body using screw means or the like.

(Problems to be Solved by the Invention) Therefore, there was a problem in that the switch operation mechanism became complicated and the time required to assemble it became complicated.

An object of the present invention is to provide a switch device for a power tool that can simplify the operation mechanism of the switch and simplify the number of steps required to assemble the switch to the tool body.

(Means for Solving the Problems) In the power tool switch device of the present invention, a handle portion formed by combining a pair of half-cut bodies so as to be separable has a recessed insertion portion extending across both the half-cut bodies. a switch rod slidably inserted into the hole;
A switch having a push button protruding into the insertion hole is assembled adjacent to the switch rod, and the switch rod has a lock for engaging the push button when the switch rod is inserted into the set position in the insertion hole. a first push-down means having a recessed joint part to prevent the switch rod from coming off by the push button, and pushing down the push button when the tip of the switch rod is inserted into the insertion hole;
and a second push-down means for pushing down the push button when the switch rod inserted into the set position in the insertion hole is pushed in.

(Function) When a switch rod that presses down or releases a push button of a switch sandwiched between a pair of half-cut bodies forming a handle part is inserted into an insertion hole of the handle part and assembled to the handle part, 1st
The tip of the switch rod is inserted into the insertion hole by pressing down the push button using the push-down means, and when the switch rod is inserted into the set position in the insertion hole, the push button is recessed into the switch rod. The push button engages the switch rod into the provided engagement portion and prevents the switch rod from coming off by the push button, and when the switch rod is pushed from the set position, the push button is pushed by the second push-down means. Lower it.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, 1 is a handle portion of a power tool, and a pair of left and right half-cut bodies 1A and 1B are fastening means (not shown). It is formed so that it can be separated and assembled via the joining interface 2 so that it can be gripped.

Reference numeral 3 denotes a switch that is fitted into recesses 4, 4 formed in the joint interface 2 side of the two half-cut bodies 1A, 1B, respectively, and is sandwiched between the two half-cut bodies 1A, 1B, and is located at the right end of the top surface in the figure. A push button 3a protrudes from the vicinity so as to be movable downward and elastically returnable for opening and closing the contacts of the switch 3 to start and stop a prime mover (not shown).

Reference numeral 5 denotes a switch rod which is inserted into the handle portion through the joint interface 2 so as to be operable to push down and release the push button 3a of the switch 3, and extends across both half-cut bodies 1A and 1B. The switch rod 5 and the push button 3 are slidably inserted into a horizontally recessed insertion hole 6 with one end open.
A switch 3, which is installed with the tip a protruding into the insertion hole 6, is assembled to the handle portion 1 adjacent to the switch 3. The switch rod 5 is normally biased in the removal direction by a spring 7 inserted into the end of the insertion hole 6, and the vicinity of its base end 5a is formed into a stepped cylindrical shape and is exposed outside the handle portion 1. At the same time, a substantially semi-cylindrical sliding portion 5 is provided at the tip of the base end 5a.
The lower surface 8 of the sliding portion 5b is formed in a flat shape so as to be slidably in close contact with the upper surface of the switch 3 to restrict rotation of the switch rod 5. The tip of the switch rod 5 is inserted into the insertion hole 6 at the tip of the lower surface 8 of the sliding portion 5b, and when the switch rod 5 is assembled to the handle portion 1, it slides into contact with the push button 3a of the switch 3. An inner sliding contact surface 9 that tilts upward toward the tip is formed in an inclined shape in order to push the switch rod 5 down into the insertion hole 6 near the base end of the lower surface 8 of the sliding portion 5b. An engaging portion 10 is recessed to engage the push button 3a and prevent the switch rod 5 from coming off when the switch rod is inserted into the set position.
The outer wall surface of this engaging portion 10 is provided with a structure that slides into contact with the push button 3a when the switch rod 5 inserted into the set position in the insertion hole 6 is pushed inward against the spring 7. 8, an outer sliding contact surface 11 is formed in an inclined shape and is inclined upward toward the front in order to be pushed down to the outside.

Both halves 1A and 1B are joined with the switch 3 sandwiched between both halves 1A and 1B, and the tip of the switch rod 5 is inserted into the insertion hole 6 with the spring 7 inserted into the insertion hole 6. Then switch 3
The push button 3a of the switch 3 is pushed down by the inner sliding surface 9, the sliding part 5b of the switch rod 5 is inserted into the insertion hole 6 to the set position, and the push button 3a of the switch 3 is engaged in the engaging part 10. , the switch rod 5 is prevented from coming off by the push button 3a.

When the switch rod 5 fixed on the handle part 1 is pushed inward, the push button 3a is pushed down by the outer sliding surface 11, the contact of the switch 3 is closed, and the prime mover starts, while the switch rod in the pushed state is pushed down. When the switch rod 5 is released, the switch rod 5 elastically retracts and returns to its original position, and the push button 3a plunges into the engaging portion 10 to open the contact point of the switch 3, thereby stopping the prime mover.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, a handle portion 1 formed by combining a pair of half-cut bodies 1A, 1B in a separable manner is slidably inserted into an insertion hole 6 recessed across both half-cut bodies 1A, 1B. Switch Rod 5
and a switch 3 having a push button 3a protruding into the insertion hole 6 are assembled adjacently, and the push button 3a is engaged with the switch rod 5 when the switch rod 5 is inserted into the set position in the insertion hole 6. The switch rod 5 has a recessed engaging portion 10 for engaging the switch rod 5.
is prevented from coming off by the push button 3a, and
The switch rod 5 has an inner sliding surface 9 that presses down the push button 3a when the tip of the switch rod 5 is inserted into the insertion hole 6, and an inner sliding contact surface 9 that presses down the push button 3a when the tip of the switch rod 5 is inserted into the insertion hole 6. An outer sliding contact surface 11 for pushing down the push button 3a is provided on the holder.

Therefore, the switch rod 5 can be assembled to the handle part 1 with one touch by simply press-fitting the switch rod 5 into the insertion hole 6 of the handle part 1, which greatly simplifies the time and effort required to assemble the switch rod 5. The contacts of the switch 3 can be opened and closed accurately by pushing and releasing operations, and the mechanism for turning the switch 3 on and off can be significantly simplified.

Furthermore, while using the power tool, the operator can hold the handle 1 with one hand and easily push and release the switch rod 5 to open and close the contacts of the switch.

(Effects of the invention) Since the present invention is constructed as described above, after the handle part is formed by assembling both halves, the switch rod can be inserted into the handle by pushing the switch rod into the insertion hole of the handle part. The switch rod can be assembled to the handle part with a single touch, reducing the number of steps needed to assemble the switch rod to the handle part, and has the effect of simplifying the mechanism for switching the contacts of the switch.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Figures 1A and 2B are longitudinal cross-sectional views of the main parts showing the on/off states of the switch, Figure 2 is an exploded view of the main parts, and Figure 3 is an exploded view of the main parts.
The figure is a perspective view of the switch rod. 1...Handle part, 1A, 1B...Half cut body, 2
...Joining interface, 3...Switch, 3a...Push button, 5...Switch rod, 10...Engaging portion, 1
1... Sliding surface.

Claims (1)

[Scope of utility model registration request] A handle portion formed by divisibly joining a pair of half-cuts includes a switch rod that is slidably inserted into an insertion hole recessed across both half-cuts, and a switch rod that projects into the insertion hole. and a switch having a push button with a push button attached thereto, and the switch rod is provided with an engaging portion for engaging the push button when the switch rod is inserted into the set position in the insertion hole. a first push-down means that prevents the switch rod from coming off by the push button and that pushes down the push button when the tip of the switch rod is inserted into the insertion hole; A switch device for a power tool, comprising: a second push-down means for pushing down the push button when the inserted switch rod is pushed in.