JP3086675U - Brake type safety switch structure - Google Patents

Abstract

(57) [Problem] A switching device including a brake plate, a safety switch, and a clutch can urgently stop the output power of a tool without turning off the power of the tool, thereby improving safety. To provide a brake-type safety switch structure to achieve. SOLUTION: When a brake plate 19 on the trigger base structure is drawn to a lateral handle 18 including a trigger base structure 1, a trigger structure 2, and a trigger base cover plate 38, the brake plate interlocks a control piece to adjust the angle of the towing plate. Adjust position and working range. As a result, the safety lock 23 pushes the long rod 25 and the clutch 3
5 transmits the power while maintaining the connected state. When the brake plate is pushed and released from the side handle, the control piece is interlocked, and the angular position of the tow plate is changed, the tow plate will not receive the safety lock and the position control of the long rod. For this reason, the clutch rotates, but is in a disengaged state where power cannot be transmitted, and the tool can be stopped.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a kind of brake type safety switch structure. In particular, it is composed of a kind of trigger base structure, trigger structure and clutch structure, and the switching device does not need to turn off the power of the tool, and the output power of the tool can be stopped urgently, achieving improved safety. Related to the brake type safety switch structure.

[0002]

[Prior art]

 The function of the power tool switch structure is to turn on or off a power supply or an operation control switch of a portable tool required for general work. On the other hand, a switch structure of a known power tool includes a trigger base structure and a trigger structure. The structure does not have a power output emergency brake stop function because it is not necessary to turn off the power source of the tool during operation. Therefore, even if an emergency stop is necessary due to carelessness, the power output cannot be stopped immediately, which may easily cause injury to personnel or mistakes in work procedures.

[0003]

[Problems to be solved by the invention]

 In order to solve the above-mentioned drawbacks of the known structure, an object of the present invention is to provide a brake-type safety switch structure. It is a modification of the well-known portable electric power tool switch structure, which consists of a trigger base structure, a trigger structure, and a clutch structure, and the switching device does not need to turn off the power of the tool and stops the output power of the tool immediately. Can achieve improved safety.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides the following brake type safety switch structure. It mainly includes trigger base structure, trigger structure, trigger base cover plate. When the brake plate on the trigger stand structure is drawn to the side handle, the brake plate interlocks with the control piece to adjust the angular position and range of activity of the traction plate. This causes the safety lock to push the long rod, thus keeping the clutch engaged and transmitting power. Conversely, when the brake plate is pushed and released from the side handle, the control pieces are linked to change the angular position of the towing plate. As a result, the tow plate is not subjected to the position control of the safety lock and the long rod, the clutch is rotated, but is in a disengaged state where power cannot be transmitted, and the tool can be stopped.

[0005]

[Embodiment of the invention]

 As shown in FIGS. 1 and 2, the present invention mainly includes a trigger base structure 1, a trigger structure 2, and a clutch structure 3. The rear end of the trigger base structure 1 is a handle 11, which includes a trigger base pivot shaft 12 and an automatic recovery switch base 13 at an appropriate position in the middle of the handle 11 advanced along the handle 11. A safety lock slide tank 14 is provided in front of the automatic recovery switch stand 13, and a guard plate 15 is provided in front of the safety lock slide tank 14. A large spring pivot shaft 16 is provided below the front end of the safety lock slide tank 14, and the large spring pivot shaft 16 pivotally contacts a large spring 17. One end of the horizontal handle 18 is fixed vertically outside the front of the trigger base structure 1 to form a horizontal handle. The opposite end extends downward by an appropriate length, and the bottom end of the extension portion pivotally contacts the bottom end side surface of the brake plate 19 in the manner of the handle portion of the lateral handle 18. The brake plate 19 and the handle portion of the side handle 18 are connected in this way to the outside of the front of the trigger base structure 1 at opposite ends, and the position of the top end of the brake plate 19 and the handle portion of the side handle 18 are Get close enough to reach the length of ordinary people's fingers.

The trigger structure 2 is mainly installed opposite to the automatic recovery switch 21 of the automatic recovery switch base 13, and has a stopper 221 at a front end and a rear end at a trigger 22 of the trigger base pivot shaft 12. Pivot. On the side, a safety lock 23 that slides back and forth in the safety lock slide tank 14 is installed. Above the safety lock 23, a non-slip lock 231 is provided, and below the safety lock 23, a protruding bar 232 is provided. In addition, a protruding head 233 is provided at the front, and the protruding head 233 pivotally connects the long rod 25. One end of the compression spring 38124 is installed on the protruding head 233, and the other end is installed in the guard plate 15. The control piece 26 pivotally contacts the brake plate 19 at one end, has an arcuate pilot notch 261 in the middle, and has a control pilot notch 262 at the opposite end. Corresponding to the arc-shaped pilot notch 261, the front bar 27 and the rear bar 28 are respectively fixed inside the trigger base structure 1 and fit into the arc-shaped pilot notch 261. The control piece 26 has a fitting recess at a certain interval below the arc-shaped pilot notch 261 and a spring piece 29 having a corresponding projection on the upper surface thereof. To be fixed. The protrusion is similar to the fitting recess shape.

[0007] The clutch structure 3 has an output gear 32 of a motor power output shaft at an appropriate position, and a transmission shaft 34 which is freely rotated at an appropriate position by being pivotally connected to the clutch base 31. . In addition, the transmission shaft 34 pivotally contacts the transmission gear 33 having the coupling notch 331 at the center position, and the transmission gear 33 and the transmission shaft 34 rotate freely and restrain each other. Never. The transmission gear 33 and the output gear 32 mesh with each other and have mutually parallel rotating shafts. Separately, the clutch 35 has a circular through hole at the center, and three rectangular wings 351 are arranged radially at regular intervals. The transmission shaft 34 passes through the center of the clutch 35 in the circular through hole. The wing 351 has a pilot notch 352 in the shape of a circle at the other end distant from the center of the clutch 35, and extends downward from a protruding plate 353 having a bevel gear. In addition, one of the three blades 351 has a small spring hook hole 354 at a position close to the intermediate side surface, and the three pilot rods 311 corresponding to the pilot notches 352 respectively are mounted on the clutch base 31. It is equipped with. The shapes of the three pilot plates 312 corresponding to the projecting plates 353 complement each other with the projecting plates 353.

In addition, one end of the small spring 355 is hooked on the small spring hook hole 354 of the wing 351. The opposite end pivots on the pilot bar 311 corresponding to the pilot notch 352 of another wing 351. One of the three blades 351 has a pulling portion 357 at the other end remote from the center of the clutch 35, and the hook hole 356 serves as a fixed end of one end of the large spring 17. A towing plate 36 is fixed on the towing portion 357, and the towing plate 36 prevents an L-shaped towing pilot notch 361 at which one end of the elongated rod 25 is pivotally connected, and a drop of the elongated rod 25 from the towing pilot notch 361. And a control rod 363 that fits into the control pilot notch 262. One side is provided with a projection corresponding to the shape of the coupling notch 331, the other side is provided with an annular pilot notch, and the coupling piece 37, whose outer shape is similar to the circular through hole on the outer clutch 35, is provided at its center position with the coupling piece 37. Corresponding to the transmission shaft 34, the transmission shaft 34 is passed through the annular drilled hole and engages, and does not perform a relative rotational movement. Further, a clutch 37 having a hole at the center, a compression spring 381, and a coupling piece 37 having a hole penetrate the conduction shaft 34 in this order, and finally the cover plate 38 is connected to a surface of the coupling piece 37 having an annular groove. The cover is fixed on the clutch 35, and the dustproof plate 39 is fixed on the trigger base structure 1. The connecting piece 37 is connected to the cover plate 38 and the clutch 35. The coupling piece 37 is fixed in the space formed by the circular fish-eye-shaped perforation, except that the connecting piece 37 is moved along with the conductive shaft 34 as the protruding portion at the bottom thereof is driven by the coupling notch 331. Rotating, the compression spring 381 acts on two opposing surfaces between the lid plate 38 and the dust plate 39. A plurality of balls are provided in the annular notch of the coupling piece 37 so that the bottom surface of the cover plate 38 presses the coupling piece 37 through the ball and makes close contact with the circular through hole on the clutch 35. Hold. Thus, the frictional force generated by the contact with the cover plate 38 during the rotation of the coupling piece 37 is reduced.

Next, as shown in FIGS. 3, 4, 5, and 6, when the trigger 22 in the handle 11 is engaged, the stopper 221 of the trigger 22 is located at a position below the protruding bar 232 of the safety lock 23. , An interference effect occurs and the trigger 22 cannot be triggered. Next, a method of starting the power tool will be described. First, the safety lock 23 is pushed rightward in the figure through the non-slip lock 231. The safety lock 23 slides and advances in the safety lock slide tank 14, interlocks with the protruding rod 232, and moves away from above the trigger 22. At this time, the interference between the stopper 221 and the protruding rod 232 is released. Therefore, the tool can be started by touching the automatic recovery switch 21 by pulling the trigger 22. Also, in order to keep the safety lock 23 in that position, the front end of the trigger 22 obstructs the protruding bar 232 in this state, and the safety lock 23 returns to the original position under the action of the compression spring 38124. Will not return. Separately, when the brake plate 19 rotates toward the horizontal handle portion of the horizontal handle 18 and approaches, the control piece 26 is interlocked to form the arc-shaped pilot notch 261, the front bar 21, and the rear bar 28. Move backward according to the locus of movement. As a result, one of the two engagement grooves below the control piece 26 engages with the protrusion of the spring piece 29, and the position of the control piece 26 is fixed. In addition, the control pilot notch 262 of the control piece 26 and the control rod 363 of the traction plate 36 limit the angular position and the range of activity of the traction plate 36.

At this time, one end of the traction plate 36 is fixed to the front end protruding head 233 of the safety lock 23, and the other end of the traction plate 36 is pivotally connected to a compression spring 38124 fixed to the guard plate 15 and compressed. Is connected to one end of the elongated rod 25. One end is pivotally mounted on the front end protruding head 233 of the safety lock 23, and the opposite end of the long rod 25 pivotally connected to the towing pilot notch 361 of the towing plate 36 is connected through the towing plate 36. The wings 351 combined with the traction plate 36 on the clutch 35 are linked, and the clutch 35 performs a clockwise rotation. When the clutch 35 makes a clockwise rotational movement, the other two wings 351 on the clutch 35 also start to rotate, and the clutch 35 is moved by the elastic plate 381 on each wing 351 due to the resilient pressure of the compression spring 381. And at the same time move along the surface of the pilot plate 312 (see FIGS. 4, 5, and 6), the clutch 35 approaches the transmission gear 33 along the transmission shaft 34, and at the same time, the coupling piece 38 As a result, a projection adapted to the shape of the coupling notch at one end of the coupling piece 37 in the circular fisheye-shaped perforation enters the coupling notch 331. The other end of the pivot shaft 16 having one end fixed to the large spring is fixed to the large spring 17 of the hook hole 356, and one end is fixed to the small spring hook hole 354 of the wing 351. The small spring 355 fixed to the pilot rod 311 at the position of the wing 351 extends. At this time, when the trigger 22 is pulled to touch the automatic recovery switch 21 to start the power tool, the output gear 32 connected to the motor power output shaft is driven by the transmission gear 33 meshing with the output gear 32. Via the coupling notch 331 in the transmission gear 33, the protrusion is interlocked with the coupling piece 37 fitted into the coupling notch 331. The coupling piece 37 then interlocks the transmission shaft 34 to output power.

Next, as shown in FIG. 7, when the top end of the brake plate 19 is pushed and separated from the horizontal handle portion of the horizontal handle 18, the control piece 26 is interlocked, and the arc-shaped pilot notch 261 and the front rod 27 , And moves forward according to the motion trajectory formed by the rear bar 28. As a result, another engaging groove below the control piece 26 and the projecting portion of the spring piece 29 are engaged, and the control piece 26 is fixed at another position. Moreover, the angular position of the control rod 363 of the traction plate 36 and the angle position of the traction plate 36 are changed according to the position of the control pilot notch 262 of the control piece 26. As a result, the towing plate 36 is out of the braking range of the elongated rod 25 and becomes free. At this time, the positions of the safety lock and the long bar 25 do not change, and the clutch 35 rotates counterclockwise and returns to the original position by the interlocking of the large spring 17 and the small spring 355. Thus, the projecting portion of the coupling piece 37 is separated from the coupling notch 331, and the power source is not output from the transmission shaft 34. At this time, the motor power is still on, the continuously rotating transmission gear 33 is idle, and the transmission shaft 34 also loses driving force and stops.

[0012]

[Effect of the invention]

 As described above, the present invention includes a switching device, and by using the switching device, the output power of the tool can be stopped urgently without the need to turn off the power of the tool, and safety can be improved. Can be dramatically increased.

[Brief description of the drawings]

FIG. 1 is an exploded view of the brake type safety switch structure of the present invention.

FIG. 2 is a side sectional view of a general state after the combination of the brake type safety switch structure of the present invention.

FIG. 3 is a side sectional view of the switch-on state after the combination of the brake type safety switch structure of the present invention.

FIG. 4 is a cross-sectional view of the brake type safety switch structure according to the present invention for switching the clutch disengaged state and the engaged state;

FIG. 5 is a sectional view taken along the line II in FIG. 4;

FIG. 6 is a sectional view taken along line II-II in FIG.

FIG. 7 is a side view of the traction plate switching of the brake type safety switch structure of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Trigger stand structure 11 Handle 12 Trigger stand pivot shaft 13 Automatic recovery switch stand 14 Safety lock slide tank 15 Guard plate 16 Large spring pivot shaft 17 Large spring 18 Horizontal handle 19 Brake plate 2 Trigger structure 21 Automatic recovery switch 22 Trigger 221 Stopper 23 Safety lock 231 Non-slip lock 232 Projection rod 233 Projection head 24 Compression spring 381 25 Long rod 26 Control piece 261 Arc-shaped pilot notch 262 Control pilot notch 27 Front rod 28 Rear rod 29 Spring piece 3 Clutch structure 31 Clutch table 311 Pilot rod 312 Pilot plate 32 Output gear 33 Transmission gear 331 Coupling notch 34 Transmission shaft 35 Clutch 351 Blade 352 Pilot notch 353 Projection plate 354 Small spring hook hole 355 Small spring 356 Hook hole 357 Pivot portion 36 牽動 plate 361 牽動 pilot notch 362 drop preventing plate 363 control rods 37 connecting piece 38 cover plate 39 dust-proof plate 381 spring

Claims (3)

[Utility model registration claims] The present invention mainly comprises a trigger base structure, a trigger structure, and a clutch structure, wherein the trigger base structure includes a brake plate, and both ends of a bottom of the brake plate are pivoted to a bottom end of a lateral handle and a front outer side of the trigger base structure. Touching the top of the brake plate and the position of the side handle close to each other to reach the length of the finger of a general person, the trigger structure includes a control piece, and one end of the control piece pivots on the side of the top of the brake plate. Abutting and opposite ends are provided with a control pilot notch, utilizing the control pilot notch, pivotally contacting a control rod of the towing plate, and having an arcuate pilot notch in the middle of the control piece, utilizing a front rod and a rear rod, Controllable the angular position of the towing plate; the clutch structure includes the towing plate having an L-shaped towing pilot notch, which pivotally connects the towing plate and the control pilot notch on the control piece; Towing pie Brake safety switch structure wherein the contact pivot through Ttonotchi. 2. An engagement notch at an appropriate distance from each other below the arcuate pilot notch in the middle of the control piece, and corresponding to the position and shape of the engagement notch, the trigger notch is provided on the trigger base structure. 2. A spring piece is provided.
The described brake type safety switch structure. 3. The structure of the clutch includes a clutch base fixed to a trigger base structure, an output gear pivotally mounted on a power output shaft of a motor, and a transmission base pivotally mounted on the clutch base. A shaft, a transmission gear pivotally mounted on the transmission shaft and meshing with the output gear, a clutch having a fisheye-shaped hole penetrating the transmission shaft at the center, and a transmission shaft pivoted at the center. A coupling piece and a dust-proof plate fixed to the clutch base are additionally provided, and one surface of the coupling piece is provided with a protrusion corresponding to the shape of the coupling notch opposite to the coupling piece, and The surface of the joint is in contact with a cover plate provided on the clutch and through which the conduction shaft passes, and the connecting piece having an outer shape and a size similar to that of the fisheye-shaped perforation is formed by the circular fisheye in the cover plate and the clutch. Constrained in the space formed by the perforated hole, Is provided with a perforation that fits snugly on the non-circular surface, and slides the coupling piece in the axial direction of the conduction shaft, but does not rotate relative to the conduction shaft, the lid plate and By providing a compression spring between the dust-proof plates, when the clutch approaches the transmission gear along the transmission axis, the coupling piece cooperates with the clutch and causes the protrusion to enter the coupling notch; A fisheye-shaped perforation is provided on one side of the clutch,
A plurality of wings are provided in the radial direction, and one of the plurality of wings has a traction portion at one end in a direction far away from the center of the clutch. And one end of the long rod is pivotally mounted, and each of the wings has an elongated pilot notch and a tooth-shaped protruding plate having a slope extending downward at one end in a direction away from the center of the clutch. In addition, the center of the transmission gear has a coupling notch adapted to the outer shape of the projection at the bottom of the coupling piece, and further, the clutch base is respectively aligned with the position of the pilot notch and the projection plate in the clutch, 2. The brake-type safety switch structure according to claim 1, comprising: a plurality of pilot rods; and a plurality of the protruding plates and a pilot plate having a shape almost complementary to each other.