JPS642394B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a switch mechanism for an electric nipper.

B. Prior art An electric nipper that continuously performs cutting operations using a motor is as described in Utility Application No. 1053 of 1983 submitted by the same applicant. Needless to say, it is extremely useful for preventing hand and neck fatigue and performing efficient cutting work during assembly line work in factories.

C. Problems to be Solved by the Invention However, the electric nipper described above is configured so that the cutting operation is stopped when the motor circuit is opened. In other words, when the pressure on the switch member is released, the motor rotation is cut off and the cutting operation is stopped, so the blade part of the nipper body is not necessarily stopped in the open state, and the motor stop position is , the blade is stopped in any state such as closed, half-open, or open state. Normally, there is a high probability that the stop will occur in a halfway open state.

Therefore, when the next cutting operation is to be performed, the operation must be started while the continuous operation is being performed.

Therefore, there is a problem in that it is difficult to bring the blade of the nipper in a stationary state into contact with the desired portion of the object to cut each object accurately.

In other words, the electric nipper described above is extremely effective for simple continuous cutting operations, but
In cases where independent accuracy is required for each cut, it is necessary that the blade remain open and stationary at all times.

D. Means for Solving the Problems Accordingly, in the present invention, a light blocking portion is formed by extending a part of a conversion member that is connected to the movable handle of the nipper body and converts the rotational motion of the motor into reciprocating linear motion. On the other hand, an optical sensor for controlling opening and closing of the motor circuit is attached to the switch member, and the circuit is configured to be closed by the interruption of the optical sensor and opened by conduction, and the conduction and interruption effects are This is performed by the light blocking part of the conversion member, and furthermore, this blocking action is always performed when the switch member is pressed, while the opening action is performed by the blade part on the nipper main body side when the switch member is released. The present invention proposes a switch mechanism in which the relative position of the light blocking section and the optical sensor is adjusted so that the switching is performed only in the open state.

Hereinafter, the gist of the present invention will be explained based on embodiments shown in the drawings.

Embodiment FIG. 1 is a partially cutaway side view showing an embodiment of an electric nipper equipped with the switch mechanism of the present invention, and FIG.
The figure is a side view of the nipper, and FIG. 3 is an exploded perspective view showing the main parts of the nipper.

In the drawings, 1 indicates the nipper body, and the support shaft 3
It consists of blade parts 2, 2' that open and close around the blade parts 2, 2', and handle parts 4, 4' formed integrally with these parts, respectively.As shown in FIG. The portion 4' is firmly fixed to the frame 5, while the lower end of the vertically long handle 4 is attached to a conversion member 6, which will be described later.
It fits loosely into the locking groove 6a.

This converting member 6 has sliding edges 6b extending on both sides, and bent step portions 5b, 5 of the frame 5 described above.
b and plate members 7, 7 fixed below the sliding grooves 8, 8.

Further, a lateral groove 9 is bored in the lower surface of the conversion member 6, and this groove is formed into an eccentric protrusion 17 of a rotating disk 16, which will be described later.
It is designed to fit loosely. Moreover, the conversion member 6
A light blocking portion 6c is integrally formed in a protruding manner on the front surface of the device.

Next, a switch member 1 is installed at the bottom of the frame 5.
0 is pivotally supported by a shaft 11 so that it can be tilted up and down freely, and a spring 12
This gives the member 11 a tendency to rotate clockwise in FIG.

This switch member 10 is attached with an optical sensor 13 consisting of a light emitting part 13a and a light receiving part 13b, and when the switch member 10 is rotated and closed around a shaft 11 (counterclockwise direction in FIG. 1) Regardless of the position of the member 6, when the light blocking section 6c intervenes between the light emitting section 13a and the light receiving section 13b of the optical sensor 13 and blocks the light, the power supply circuit to the motor 14 is closed. On the other hand, the switch member 10 is opened by the elasticity of the spring 12,
(clockwise direction in FIG. 1), light blocking portion 6c of conversion member 6
Only when the blade 2 moves to the leftmost position in FIG. The motor 14
The circuit is cut off.

Therefore, when the motor 14 is stopped, the blade portions 2, 2' are always kept open.

The rotational movement of the motor 14 is controlled by a deceleration mechanism 15.
The rotating disk 16 is rotated through the eccentric protrusion 1
7 is loosely fitted into the lateral groove 9 of the conversion member 6, and the sliding edges 6b, 6b on both sides of the converting member 6 are loosely fitted into the sliding grooves 8, 8 of the frame 5, so that the disc 16 The rotational motion is converted into a reciprocating linear motion of the conversion member 6 along the sliding grooves 8, 8, and this operation is converted into an opening/closing operation of the blade portion 2 via the handle portion 4.

Reference numeral 18 in the figure is an adjustment screw for adjusting the closed position of the blade parts 2, 2', and is used to regulate the closed position of the blade part 2. For this purpose, the width of the horizontal groove 9 is set at the center. It is formed slightly wider to prevent excessive tightening between the blade parts 2 and 2'.

Further, this screw 18 is connected to the vertical groove 19 of the frame 5.
It is screwed into a groove ring 20 that is press-fitted and tightened.

21, 21... are lead wires that send the signal from the optical sensor 13 to a required electric box (not shown), and 23 is a reverse switch that allows the blades 2, 2' to bite into the object to be cut and separate. This is used when there is no such device.

F. Effect In the nipper with the above-described structure and built-in mechanism, when the switch member 10 is pressed and closed, the optical sensor 13 is also rotated together and becomes in a state where the light blocking part 6c is sandwiched, so that the optical sensor 13 becomes conductive. As a result, the circuit of the motor 14 is closed, the motor 14 rotates, the rotating disk 16 rotates via the deceleration mechanism 15, and the eccentric protrusion 17 also rotates.

The horizontal groove 9 and the sliding edge 6 into which the eccentric protrusion 17 is loosely fitted
The conversion member 6 generates a reciprocating linear movement due to the relationship with the sliding grooves 8, 8 into which the locking grooves 6 and 6b are loosely fitted.
By operating the handle 4 connected to a, the blade 2 is opened and closed relative to the blade 2'.

That is, a continuous cutting action of the blade portions 2, 2' is performed.

Next, if the pressing force on the switch member 10 is released,
The member 10 is stopped from rotating at a certain angle clockwise in FIG. 1 by the elasticity of the spring 12. In this state, the light blocking portion 6c of the conversion member 6 is moved to the leftmost position in FIG.
In order to allow conduction through the handle 4, the motor 14 is stopped only when the blade part 2 is in the most open state, and the blade parts 2, 2' are always in the open state when stopped.

Therefore, cutting with accurate positioning is facilitated each time.

In the embodiment, the motor circuit is opened and closed using an optical sensor, but it goes without saying that a magnetic sensor may also be used.

G. Effects of the Invention As described above, by being equipped with the switch mechanism of the present invention, the blade part of the electric nipper can always be held in the open state when stopped, so that independent cutting operations can be performed every time. This makes it possible to perform accurate and smooth cutting, and in combination with continuous cutting work, this contributes to practical use, which is extremely significant.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing an embodiment of the electric nipper equipped with the mechanism of the present invention, Fig. 2 is a side view of the nipper, and Fig. 3 is an exploded perspective view of the main parts of the nipper. be. 1-Nitsupa body, 2, 2'-blade section, 4, 4'-handle section, 6-conversion member, 6c-light blocking section, 10-switch member, 13-light sensor, 14-motor.

Claims (1)

[Scope of Claims] 1. In an electric nipper that continuously opens and closes the blade by connecting a conversion member that converts the rotary motion of the motor into linear reciprocating motion to one handle of the nipper main body, the motor circuit can be opened and closed. A light sensor integrated with a switch member is placed opposite to a part of the conversion member, and when the switch member is closed, light is cut off to maintain the motor circuit in a closed state, while when the switch member is opened, the light sensor is integrated with the switch member. A switch mechanism for an electric nipper, characterized in that the relative position of the optical sensor and the conversion member is regulated so as to permit conduction and to stop the blade of the nipper in an open position. 2. The electric nipper switch mechanism according to claim 1, wherein the optical sensor is replaced with a magnetic sensor.