KR102016292B1 - Portable Motorized Scissors - Google Patents

Abstract

The present invention relates to portable electric scissors comprising: a rotary cutting blade installed at the front end of a scissors body to be rotatable; a fixed cutting blade fixed to the front end of the scissors body; an operator operating the rotary cutting blade; a control part controlling the operator; and a housing surrounding the scissors body. The operator includes a motor, speed reducer, pinion gear and rack. The rotary cutting blade includes: a driven pinion gear rotated by the linear movement of the rack; at least two scissors operating gears installed by being separated in a rotation axis direction of the driven pinion gear; and a cutting scissors gear formed on one side of the rotary cutting blade and interlocked with the scissors operating gears. A rack housing member, which has a hollow cylindrical interior to enable the rear end of the rack to be linearly moved therein, is combined with the rear end of the housing.

Description

Portable Motorized Scissors {Portable Motorized Scissors}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scissors operated by an electric motor, and more particularly, to a portable electric scissors that can be used in applications such as cutting of a battery of a twig or a waste wire, and can be conveniently used while being carried by an individual.

Wire cable (hereinafter referred to as wire) used for communication, broadcasting, power transmission, etc. is a structure in which the outer surface of a conductor made of copper is usually covered with an insulator. In the event of a loss, the cable is replaced and the collected wire is discarded or the outer shell is removed and the copper wire inside is extracted and recycled.

However, when the collected wires are disposed of, various environmental problems such as natural destruction occur. Therefore, a huge cost and a lot of time need to be invested to restore the damaged nature. Because copper is a relatively expensive and precious material, in recent years, there is an increasing tendency to recycle and reuse it as a wire material, rather than to dispose and bury it.

In order to extract copper from the waste wire, it is necessary to go through several subsequent processes after the collection of the waste wire. In order to facilitate the following processes, it is desirable to cut the waste wire into short lengths to facilitate handling of the waste wire. There are many.

Conventionally, such a waste wire cutting operation has been performed using hydraulic scissors, an example of the hydraulic scissors is shown in Patent Publication No. 10-0812711 (Patent Document 1). These hydraulic shears have the advantage of exerting a large cutting force compared to their size, while being able to withstand high pressure hydraulic pressure and making them relatively precisely controllable, resulting in considerable volume and weight, and externally provided hydraulic pumps and control valves. It is difficult for an individual to carry and use because it must be used in connection with essential hydraulic devices such as a drain tank and the like. Moreover, this rather complicated configuration makes it difficult for an individual to purchase it at an expensive price, and due to the characteristics of the hydraulic equipment, the working speed is lowered, and the working efficiency is lowered. There is this.

On the other hand, the shape or operation of the blade portion, widely used for tree branches management, similar to the manual pruning shears, but may be used to cut the waste wire using electric pruning shears operated by an electric motor. An example of such electric pruning shears is shown in Unexamined-Japanese-Patent No. 20-2011-0010079 (patent document 2). Such electric pruning shears have the advantage of being convenient for the individual to use with appropriate size and weight, but the disadvantage is that the diameter of the cutable branches (or closed wires) is limited because the cutting area of the scissors blade is relatively narrow.

In order to remedy these drawbacks of the prior art, other types of electric shears or cable shears have been proposed, which are designed to cut wires by means of fixed blades and moving blades which are slid towards the fixed blades. The cable cutter of 1007475 (Patent Document 3) has a disadvantage in that it is not cumbersome, but it is rather cumbersome to insert the wire to be cut into the cutter.

Registered Patent Publication No. 10-0812711 (Announced on Dec. 12, 2008) Published Utility Model Publication No. 20-2011-0010079 (Published October 26, 2011) "Electric Battery Scissors" Registered Patent Publication No. 10-1007475 (January 12, 2011) “Safety Cutting Machine for Concentric Neutral Power Cable”

The present invention is conceived to solve the above problems by combining the advantages of the prior art, the object of the present invention is to provide a portable electric scissors that can be conveniently used while moving by an individual.

Another object of the present invention is to provide electric shears that inherit the advantages of transmission energy, cutting area, etc. while compensating for disadvantages such as weight, operating speed, volume, and price compared to conventional hydraulic scissors.

It is still another object of the present invention to provide a new structure of electric scissors capable of cutting a thicker branched cell or a waste wire compared to conventional electric pruning shears.

Still another object of the present invention is to provide an electric scissors that can be easily replaced by cutting blades of electric scissors that are easy to manage and maintain and which are easy to wear.

In order to achieve the above object, the portable electric scissors according to the present invention, the rotary cutting blade is rotatably installed on the tip of the scissors main body; A fixed cutting blade fixedly installed at the tip of the scissors main body; A driving device for operating the rotating cutting blade; A control unit for controlling the driving device; And a housing surrounding the scissor body, wherein the driving device includes a motor, a reducer, a pinion gear, and a rack, and the rotating cutting blade is driven by a linear motion of the rack. And two or more scissors driving gears spaced apart in the direction of the rotational axis of the driven pinion gear, and cutting scissors gears formed on one side of the rotary cutting blade and engaged with the scissors driving gears. The rack housing member is formed is coupled to the rear end of the rack configured to be linearly movable inside, the lower side of the housing is provided with a circular ring-shaped fixing band for the user's arm can be fitted, the front side of the fixing band With hand operated and finger operated switch It is provided.

In addition, the scissors main body is provided with an overcurrent detection sensor and a static electricity detection sensor,

The motor may be provided with an overheat prevention sensor.

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According to the portable electric scissors according to the present invention as described above, compared to the conventional hydraulic scissors, the smaller, lighter, faster operation and cheaper price, yet the cutting force or the cutting surface area and the like can provide an excellent electric scissors.

In addition, unlike the conventional hydraulic scissors has the advantage that the individual can easily carry and use while moving.

Furthermore, there is an advantage that it is possible to provide electric scissors that are easy to manage and maintain, such as the replacement of worn cutting edges.

1 is a front view of a portable electric scissors according to the present invention.
2 is a perspective view of a portable electric scissors according to the present invention.
3 is an exploded perspective view of the portable electric scissors according to the present invention.
Figure 4 is a block diagram schematically showing the electric system and power transmission system of the portable electric scissors according to the present invention.

Hereinafter, an embodiment of a portable electric scissors according to the present invention with reference to the accompanying drawings will be described in detail.

1 is a front view of a portable electric scissors according to the present invention, Figure 2 is a perspective view, Figure 3 is an exploded perspective view, Figure 4 is a schematic block diagram showing the electric system and power transmission system of the portable electric scissors according to the present invention. .

1 and 2, the portable electric scissors 10 of the present invention is a housing 100, the various operating mechanisms for operating the cutting blades of the electric scissors are located inside, the front side of the housing 100 Fixed cutting blade 210 and the rotating cutting blade 220 is located, the circular ring-shaped fixed band portion 330 located on the lower rear side of the housing 100 and the handle portion 310 located on the lower front side of the housing 100 And, it comprises a connecting member 410 located on the upper rear side of the housing 100.

The fixed ring portion 330 of the circular ring shape provided on the lower rear side of the housing 100 is a portion to which the user's arm is fitted, and the user who inserts the arm through the fixing band 330 is the housing 100 by hand. The grip portion 310 is located on the lower front side of the user, the index finger of the user is located on the trigger switch 320 of the trigger shape provided on the upper side of the handle portion 310 to pull the operation switch 320 You can operate the scissors.

The connecting ring member 410 provided at the upper rear side of the housing 100 is a ring member for connecting a shoulder strap which can be tied to a user's shoulder, and the electric scissors of the present invention are provided only by the user's arm inserted into the fixing band part 330. In case of supporting the arm, the arm can go unreasonable when used for a long time, so as to support some of the load of the electric scissors to the shoulder part, so that the user's health and work safety can be noted.

Hereinafter, the internal structure of the portable electric scissors according to the present invention will be described in detail with reference to FIG. 3 along with FIGS. 1 and 2.

In the portable electric scissors 10 of the present invention, the housing 100 includes a housing body 110, a left cover 120, a right cover 130, an upper cover 140, and a rear cover 150.

The fixing band part 330 and the handle part 310 are provided below the housing main body 110, and the gear fixing part and the guide part 115 are provided above. On the upper side of the housing main body 110, a CPU control board 610 constituting the control unit 600 to be described later may be mounted. The CPU control board 610 is connected to the driving motor 510 and the operation switch 320 to control the driving motor 510 by operating the operation switch 320 of the user so that the rotary cutting blade 220 is operated.

The drive pinion gear 520 is installed in the gear fixing unit 530 coupled to the rotation shaft of the drive motor 510 near the gear fixing part of the housing main body 110 and the rear end of the guide part 115. The opposite end of the gear connecting portion 530 is rotatably fixed to the gear fixing portion and the guide portion 115 so that the drive pinion gear 520 can rotate stably. A bearing 533 may be used in the gear connecting portion 530 and the gear fixing portion and the guide portion 115 for the smooth rotational movement of the gear connecting portion 530.

As will be described later, the drive pinion gear 520 is engaged with the rack 540 to move the rack 540 forward and backward, so that the drive pinion gear 520 is located approximately in the center of the housing 100. Accordingly, the drive motor 510 is disposed in a position biased to the right. Accordingly, a motor accommodating part 133 protruding outward may be provided at the rear side of the housing right cover 130 to accommodate the driving motor 510.

The inner lower portion of the rear cover 150 is provided with a rack fixing frame 153 extending toward the front to support the rack 540 to be moved forward and backward. The rack fixing frame 153 is provided with walls on both the lower side and the left and right sides to support the rack 540 not to be separated from the rack fixing frame 153 while the upper side is opened to expose the horizontal gear formed on the rack 540. The drive pinion gear 520 and the driven pinion gear 550 described later can be engaged with each other. One side of the rack fixing frame 153 may be provided with a drive pinion protection member 155 extending toward the upper side and then extending toward the front to form a substantially "a" shape. The driving pinion protection member 155 is located at a position surrounding the driving pinion gear 520 at the rear side and the upper side in a state where both the housing body 110, the driving pinion gear 520, and the rear cover 150 are assembled. By being provided, the drive pinion gear 520 is doublely protected together with the upper cover 140 and the rear cover 150 of the housing.

The rear side of the rear cover 150 is provided with an elongated cylindrical rack housing member 157 is extended to the rear side so that the rear side of the rack 540 retreat to the rear side can be accommodated without being exposed to the outside, This ensures that the rack 540 can always be protected from external impact or contamination.

A driven pinion gear 550 is rotatably fixed to one side near the front of the gear fixing part and the guide part 115. The driven pinion gear 550 rotates only when the drive pinion gear 520 rotates by the rotation of the drive motor 510 and the rack 540 moves forward to engage the driven pinion gear 550. , The rotation direction is changed according to the movement direction of the rack 540.

In addition, the gear fixing portion and the front portion of the guide portion 115 is disposed spaced apart from the driven pinion gear 550 in the left and right directions, and is fixed to the same rotating shaft as the driven pinion gear 550, that is, the gear connecting portion 555. The first scissors drive gear 560 is provided. A first scissors driving gear 560, a second scissors driving gear 570, a third scissors driving gear 580, etc. may be additionally provided in the gear fixing part and the guide part 115 toward the front side. The gear ratio combination adjusts the final reduction ratio so that the cutting blades of the electric shear can be operated by the drive torque within the designed range. Two or more scissors driving gear may be provided, and in the illustrated embodiment, three are provided.

The third shear drive gear 580 meshes with the cutting shear gear 230. The cutting shear gear 230 is formed in a fan shape of a predetermined angle and provided to rotate in engagement with the third shear driving gear 580 only within an angle range smaller than the predetermined angle, and is rotated by the cutting blade connecting member 240. When the cutting shear gear 230 is rotated by being fixedly connected to the blade 220, the rotating cutting blade 220 is configured to rotate in conjunction with it. Alternatively, the cutting blade connecting member 240 may be integrally formed with the cutting shear gear 230.

Combination of the rotary cutting blade 220 and the cutting blade connecting member 240 may be made in a variety of ways known in the art, but when the cutting blade is worn it needs to be provided so that the rotary cutting blade 220 can be easily separated To cut a portion or all of the periphery of the end of the cutting blade connecting member 240 to be keyed or coupled to the cutting blade connecting member 240, but the rotary cutting blade 220 is coupled to the rotary cutting blade 220 Rotating shaft coupling portion of the same shape by forming the cutting blade connecting member 240 and the rotating cutting blade 220 can be configured to rotate while being interlocked easily.

A fixed cutting blade 210 is positioned between the cutting shear gear 230 and the rotating cutting blade 220, and the rotating blade hole 213 through which the cutting blade connecting member 240 can be passed to one side of the fixed cutting blade 210. Is provided. A bearing 243 may be provided for smooth rotational movement between the cutting blade connecting member 240 and the rotating shaft hole 213 of the fixed cutting blade 210. It is preferable that the inner end of the fixed cutting blade 210 is elongated so as to be firmly fixed to one side of the gear fixing part and the guide part 115 by a detachable method such as bolting.

Both ends of the cutting blade connecting member 240 is coupled to the cutting blade gear covers 250 and 260. The cutting blade gear covers 250 and 260 minimize the external exposure of the third scissors driving gear 580 or the cutting scissors gear 230 to prevent the gears from being damaged or contaminated. The left cutting blade gear cover 250 may be formed in a shape capable of protecting the upper and lower sides of the gears. On the other hand, the right cutting blade gear cover 260 may be formed in a flat shape.

When the battery or the waste wire cutting operation by the fixed cutting blade 210 and the rotating cutting blade 220 is repeated, the cutting blade is worn and must be replaced. In the operation method of the portable electric scissors according to the present invention, since the rotary cutting blade 220 tends to wear faster than the fixed cutting blade 210, the fixed cutting blade 220 must be replaced several times after the fixed cutting blade ( 210) will be replaced. Therefore, it is preferable that the rotating cutting blade 220 is configured to be easier to replace than the fixed cutting blade 210.

In the portable electric scissors according to the present invention, if only the right cutting blade gear cover 260 is removed, the rotating cutting blade 220 can be easily removed and replaced with a new rotating cutting blade 220. In addition, the left cutting blade gear cover 250 during this replacement operation can protect the cutting shear gear 230 and the rear portion of the fixed cutting blade 210 from damage due to external impact.

The drive motor 510 and the reducer, drive and driven pinion gears 520, 550, rack 540, etc., not shown separately (or built into the drive motor 510), are included in the drive device 500. May be referred to. In the present specification, the driving device 500 may be used to mean the first to third scissors driving gears 560, 570, and 580.

The driving motor 510 is automatically rotated within the angle range of the rotary cutting blade 220 is smaller than the predetermined angle that the cutting shear gear 230 rotates while the operator presses the operation switch 320. And repeatedly reciprocating. In this case, while the operator continuously presses the operation switch 320 with the right hand holding and holding the electric scissors of the present invention, the waste wire is held by the left hand to insert the waste wire when the rotary cutting blade 220 is opened. By repeating the operation, the closed wire can be cut quickly.

Alternatively, the operation switch 320 is provided as a bi-directional switch, the drive motor 510 is configured to rotate forward or reverse according to the pressing position or direction of the operation switch 320, the operator arbitrarily the rotary cutting blade It may be configured to be able to move the 220 up or down. In this case, a limit switch (not shown) connected to the CPU control board 610 so that the power of the driving motor 510 is automatically cut off when the rotary cutting blade 220 reaches the upper or lower limit of the operable range. ) May be added.

As the driving motor 510, a brushless DC motor may be used. In this case, noise due to the contact of the brush part of the existing brush motor is reduced, and thus a lower noise working environment can be established.

The upper cover 140 of the housing 100 may be provided with a battery connector member 143. In the illustrated embodiment, the battery connector member is extended in the front and rear direction of the upper cover 140 to form a part of the right side of the upper cover 140, the rear end is provided in a more protruding shape than the upper cover 140 It is open to the rear.

The portable electric scissors according to the present invention typically operate by receiving power from a portable battery pack (not shown) that can be carried like a backpack behind the back, and the power supply line (not shown) drawn from the battery pack is operated. By coupling to the rear end of the connector member 143, the battery pack power can supply power to the driving motor 510 and the CPU control board 610.

The housing 100 is equipped with an electrostatic detection sensor (not shown) and an overcurrent detection sensor (not shown) to detect static electricity or overcurrent, thereby preventing damage to electrical / electronic devices such as the CPU control board 610. The safety of workers can be ensured.

In addition, the driving motor 510 is provided with an overheat prevention sensor (not shown) to take measures such as reducing the operating speed of the driving motor 510 or suspending the operation through the CPU control board 610 when overheating is detected. You can do that.

With reference to Figure 4 will be briefly described for the electric system and power transmission system of the portable electric scissors according to the present invention.

The electricity supplied from the battery 620 operates the control unit 600 including the CPU control board 610, and the control unit 600 operates the drive motor 510 provided with the reducer, and drives the drive motor 510. The rotary cutting blade 220 of the electric scissors is driven by a power transmission device (drive pinion gear 520, driven pinion gear 550, rack 540, scissors drive gears 560, 570, 580, etc.) driven by the power transmission device. In this case, the sensor 700 such as an overcurrent detection sensor or an electrostatic detection sensor provided in the main body and an overheat prevention sensor provided in the driving motor 510 operates to detect a malfunction or abnormal operation so as to improve work safety. have.

Although one embodiment of the portable electric scissors according to the present invention has been described above, this is merely illustrative and should not be construed as limiting the scope of the present invention, the scope of the present invention being defined only by the following claims. It should be noted that losing.

10: portable electric scissors
100 housing 110 housing body
115: gear fixing and guide
120: left cover 130: right cover
133: motor housing 140: upper cover
143: battery connector member 150: rear cover
153: rack fixing frame 155: drive pinion protection member
157: rack housing member
210: fixed cutting blade 213: rotary shaft ball
220: rotating cutting blade 230: cutting shear gear
240: cutting blade connecting rod 243: bearing
250: left cutting blade gear cover 260: right cutting blade gear cover
310: handle portion 320: operation switch
330: fixing band portion 410: connecting member
500: drive device 510: drive motor
520: drive pinion gear 530: gear connecting rod
533: bearing 540: rack
550: driven pinion gear 555: gear connecting rod
560: first scissors drive gear 570: second scissors drive gear
580: Third Scissor Driving Gear
600: control unit 610: CPU control board
620: Battery
700: sensor

Claims (3)

A rotating cutting blade rotatably installed at the tip of the scissors main body;
A fixed cutting blade fixedly installed at the tip of the scissors main body;
A driving device for operating the rotating cutting blade;
A control unit for controlling the driving device; And
A housing surrounding the scissor body;
Including but not limited to,
The drive device includes a motor, a reducer, a pinion gear and a rack,
The rotary cutting blade is driven pinion gear rotated by the linear motion of the rack, two or more shear drive gears spaced apart in the direction of the rotation axis of the driven pinion gear, and formed on one side of the rotary cutting blade and the shear drive gear and Includes interlocking cutting shear gears,
To the rear end of the housing, a rack housing member configured to be formed in a hollow cylindrical shape so that the rear end of the rack is linearly movable therein is coupled,
The lower side of the housing is provided with a fixed ring of circular ring shape that can be fitted to the user's arm,
Portable electric scissors, characterized in that the front side of the fixing band portion is provided with a handle which is provided with an operation switch operable by the user and fingers. The method according to claim 1,
The scissors main body is provided with an overcurrent detection sensor and a static electricity detection sensor,
Portable electric scissors, characterized in that the motor is provided with an overheat prevention sensor. delete

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