JPH0117249Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an electric nipper used for cutting wire materials such as electric wires.

[Conventional technology]

Generally, excess parts of the mounting legs of electronic components soldered to a printed circuit board are cut off using nippers.

[Problem that the invention attempts to solve]

By the way, since conventional nippers are manually operated, there are problems in that hands tend to get tired and work efficiency is poor.

Therefore, this invention solves the above problems by making it possible to open and close the pair of cutting blades automatically, and also to keep the pair of cutting blades in the open state when stopped, so that cutting work can be carried out easily. The technical challenge is to improve efficiency.

[Means for solving problems]

In order to solve the above problems, this invention houses a motor and a reduction gear driven by the motor from above inside a cylindrical holder, and stores it inside a case provided at the lower end of the holder. The operation piece of a pair of cutting blade pieces connected so as to be openable and closable is arranged, the cutting edge part of the cutting blade piece is positioned outside from the opening provided in the front wall of the case, and one of the cutting blade pieces is attached to the case. A disk rotatably driven by the speed reduction device is disposed above the operating piece of the other cutting blade that can be opened and closed, and the outer circumference of the lower surface of the disk A spring is provided to bring the outer side of the operating piece of the openable/closable cutting blade into contact with the eccentric pin provided on the eccentric pin, and the opening of the operating piece is placed on the outside in the opening/closing direction of the operating piece of the openable/closable cutting blade. The motor stop switch is provided in parallel with the motor start switch.

[Effect]

In the electric nipper with the above configuration, when the motor is driven by the motor start switch and the reduction gear is activated, the disk rotates and the eccentric pin provided on the disk moves circularly around the axis of the disk. . Since the operation part of the cutting blade piece that can be opened and closed is pressed against the eccentric pin by the elasticity of the spring, the cutting blade piece that can be opened and closed is moved against the fixed blade piece by the circular movement of the eccentric pin. It can be rotated to open and close the blade edge portions of the pair of cutting blades. Furthermore, when the motor start switch is turned off, the operation piece of the cutting blade that can be opened and closed operates the motor stop switch in the open state, so the motor stops and the cutting edge of the cutting blade is held in the open state. Ru.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, inside the cylindrical holder 1, a motor 2 and a speed reduction device 3 driven by the motor 2 are housed from the top. Further, a case 4 is provided at the lower end of the holder 1.

The case 4 has a flat rectangular shape with a flat bottom surface. Further, an opening 6 is formed in the front wall 5 of the case 4, and both sides of the upper part of the opening 6 form an inclined surface 7 that slopes in two directions, and a starting switch 8 for the motor 2 is attached to one of the inclined surfaces 7. ing.

Furthermore, a bulge 9 is formed on the rear surface of the case 4, and the bulge 9 has an arc shape as shown in the plan view of FIG.

Inside the case 4, there is a pair of cutting blade pieces 1.
0 and 10 operating pieces 11 are arranged. These cutting blade pieces 10, 10 are connected to a pin 1 provided at the intersection.
It can be opened and closed centering around 2, and the cutting edge part 1 at the tip
3 is located outside from the opening 6.

Of the pair of cutting blade pieces 10, 10, one cutting blade piece 10 is fixed to the side wall of the case 4 by a screw 14 screwed into the end of the operating piece part 11, and the other cutting blade piece 10 can be opened and closed. ing. The tip of an adjusting screw 15 screwed into the side wall of the case 4 comes into contact with the outer surface of the operating piece 11 whose end is fixed, and when the adjusting screw 15 is rotated and moved in the axial direction, the fixed end is removed. The operating piece 11 is deformed around the screw 14, and can finely adjust the degree of contact between the cutting edges of the pair of cutting blade pieces 10, 10.

A disk 16 that is rotatably driven by the speed reduction device 3 is disposed on the outer upper part of the operation piece 11 of the cutting blade piece 10 that is provided so as to be openable and closable, and an eccentric pin 1
A spring 18 is provided between the pair of operating pieces 11, 11 to bring the outer side of the operating piece 11 of the cutting blade piece 10, which can be opened and closed, into contact with the spring 18. Further, a motor stop switch 19 is provided on the outside in the opening/closing direction of the operation piece 11 of the cutting blade piece 10 which can be opened and closed, and is activated when the operation piece 11 is opened. As shown in the circuit diagram of FIG. 3, this motor stop switch 19 is provided in parallel with the motor start switch 8, and closes the circuit when the operating section 11 is not in contact with it.

The electric nipper shown in the embodiment has the above-mentioned structure, and this nipper can be used to cut objects while holding the holder 1 between the thumb and index finger and placing the remaining three fingers along the bottom surface of the case 4. Make sure to do the following.

With the grip as described above, the motor starting switch 8 is placed at the tip of the index finger, making it easy to operate the switch.

Now, when the motor 2 is started by operating the motor start switch 8, the speed reducer 3 that is linked to this starts.
is activated, the disk 16 rotates in one direction, and the eccentric pin 17 moves circularly about the axis of the disk 16.

The eccentric pin 17 has an operating piece 11 of the cutting blade piece 10 that can be opened and closed by the elasticity of a spring 18.
is pressed, the circular movement of the eccentric pin 17 opens and closes the openable and closable cutting blade piece 10. Therefore, the object to be cut can be cut by positioning the object between the blade edges 13 of the pair of cutting blade pieces 10, 10 in an open state.

During the cutting operation of the object to be cut as described above, the operating section 11 of the cutting blade piece 10 that can be opened and closed operates the motor stop switch 19 in the open state.
Since the motor starting switch 8 is in a closed circuit state, the motor 2 does not stop but remains in a rotating state.

Therefore, when the motor starting switch 8 is turned off, the motor 2 rotates until the operation piece 11 of the openable/closable cutting blade piece 10 operates the motor stop switch 19, and when the operation piece 11 is opened, When the motor stop switch 19 is activated,
The motor 2 is stopped, and the cutting edge portion 13 of the openable/closable cutting blade piece 10 is maintained in a state separated from the blade edge portion 13 of the other cutting blade piece 10.

In addition, in the circuit diagram of FIG. 3, if a switch 20 for reversing the motor 2 is provided and the circuit is switched via a relay 21 by the operation of the switch 20, the object to be cut is hard and a pair of When the cutting edge of the cutting blade piece 10 is stuck to the object to be cut and cannot be opened, the pair of cutting blade pieces 10 can be opened by operating the switch 20, and the cutting operation can be completed. can be done efficiently.

In the case of the embodiment, each wall of the case 4 is shown as having an integral structure, but in reality, the bottom wall of the case 4 is removable, and when the bottom wall is removed, a pair of cutting blade pieces 10, etc. I am trying to assemble the parts.

〔effect〕

As described above, according to this invention, the operation piece of the openable/closable cutting blade piece is pressed by the spring against the eccentric pin of the disk that is rotationally driven by the motor, so that Therefore, the pair of cutting blade pieces can be opened and closed, and the cutting work of the object to be cut can be performed efficiently.

In addition, the holder that houses the motor and speed reducer extends in a direction that intersects the length direction of the pair of cutting blades, and the holder can be held as if gripping the cutting blades. It is much easier to use than when the holder is installed in the horizontal direction.
Furthermore, since the disk equipped with the eccentric pin can be directly connected to the output shaft of the reduction gear, assembly is easy.

Furthermore, when the motor start switch is turned off, the operation piece of the cutting blade piece that can be opened and closed operates the motor stop switch and stops the motor. The cutting edge can be stopped and held in an open state, allowing the next cutting operation to be carried out quickly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the electric knipper according to the invention, FIG. 2 is a cross-sectional plan view of the same, and FIG. 3 is an electric circuit diagram of the same. DESCRIPTION OF SYMBOLS 1...Holder, 2...Motor, 3...Reduction device, 4...Case, 5...Front wall, 6...Opening, 8
...Motor starting switch, 10...Cutting blade piece, 11...Operation piece, 16...Disc, 17
... Eccentric pin, 18 ... Spring, 19 ... Motor stop switch.

Claims (1)

[Scope of utility model registration request] A motor and a speed reduction device driven by the motor are housed inside the cylindrical holder from above, and a pair of cutting blade pieces connected to each other in an openable and closable manner are housed inside a case provided at the lower end of the holder. An operating piece is arranged, the cutting edge of the cutting blade is positioned outside from an opening provided in the front wall of the case, and one of the cutting blade pieces is fixed to the case so that the other cutting blade can be opened and closed. A disk rotatably driven by the reduction gear is arranged above the operation piece of the cutting blade piece that can be opened and closed, and the cutting blade piece that can be opened and closed is operated by an eccentric pin provided on the outer periphery of the lower surface of the disk. A spring is provided for bringing the outer side of the piece into contact, and a motor stop switch is provided on the outside in the opening/closing direction of the operation piece of the cutting blade piece that can be opened and closed, and is activated when the operation piece is released. An electric nipper with a switch installed in parallel with the motor start switch.