KR100266331B1 - An edge catridge and rotary cutter having the edge catridge - Google Patents

Abstract

PURPOSE: A blade cartridge and a rotary cutter having the same are provided, which are characterized by easy exchange of the blade and decreased exchanging time by exchanging the blade cartridge, safe exchange of the blade by setting a protecting cover, and preventing an accident owing to storing or breaking the exchanged cartridge protecting with the protecting cover. CONSTITUTION: The blade cartridge is comprised of: a cover unit having a fixed inner space and an opening part opened partially; a circular blade set on the cover unit to make rotate and exposed through the opening part; and the protecting cover which is connected with the cover unit to make slide, opening and closing the opening part. The cover unit is comprised of: an upper cover formed with a boss; a lower cover connected with the upper cover and installed with a through hole penetrating the boss; a nut controlling friction contact force between the blade, the upper cover and the lower cover; and a sleeve set between the boss and the blade. The rotary cartridge is comprised of: a circular blade; an upper cover formed with a boss; a lower cover formed with an inner space by connecting with the upper cover and formed with a through hole penetrating the boss; a cover unit having an opening part exposing a part of the blade; and a grip connected with the upper cover.

Description

Blade cartridges and rotary cutters

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade cartridge and a rotary cutter employing the same, and more particularly, to a blade cartridge and a rotary cutter employing the same, the structure of which is improved to simplify replacement of worn blades protected from injury.

Rotary cutters, which are usually used as substitutes for scissors for cutting cloth and the like, are composed of a holder in which a circular blade is rotatably received, and a handle in which the holder is fixed and gripped to enable work. Such a rotary cutter makes it possible to freely cut a thin cloth or the like which is difficult to cut with scissors according to a straight line or a curve.

On the other hand, the blade to be used is required to be replaced, for example, as a razor blade, sharp and repeated use or blunt and broken by collisions, interference, etc. with other objects.

One example of such a rotary cutter is schematically shown in FIGS. 1 and 2. The holder 10 of the rotary cutter shown has a hollow support portion 12 on which the grip portion 11 and the blade 20 held by the operator are supported, and the support portion 12 receives and pushes the push button 30. The boss 31 of the button 30 is movable along the long hole 12a. The holder 10 is also provided with a release button 15 for unlocking the movement position of the push button 30.

On the other hand, the blade 31 is rotatably coupled to the boss 31 by the pivot 50 and the nut 40, and between the pivot 50 and the blade 20, a wave spring (60) and The fan-shaped cover 70 is interposed so that the rotational resistance of the blade 20 can be adjusted as the nut 40 is tightened.

As shown in FIG. 2, the rotary cutter configured as described above is fixed in a state in which the push button 15 is moved by a predetermined locking device (not shown) when the push button 15 is pressed (indicated by a dotted line). do. At this time, the boss 31 is moved along the long hole 12a and a part of the blade 20 is separated from the support 12. In this state, cutting work such as cloth is possible.

However, the rotary cutter as described above has the following problems when trying to replace the worn or damaged blade 20 during use.

First, there is a hassle to separate and combine nuts, pivots, wave springs and covers.

Second, safety accident occurs because the operator has to hold the blade directly during the exchange.

Third, when the thin blade is replaced, there is a possibility of being easily damaged even by weak collision with other surrounding parts.

Fourth, there is a problem that a safety accident occurs in the process because the damaged broken blades are separated separately.

The present invention has been made to solve the above problems, has the following object.

First, it is to provide a blade cartridge and a rotary cutter employing the same, which makes it easy to replace the blade and greatly shortens the working time.

Second, there is provided a blade cartridge and a rotary cutter employing the same so that the blade can be safely replaced when the blade is replaced.

Third, there is provided a blade cartridge and a rotary cutter employing the same so that the blade can be protected in spite of collisions with other parts when the blade is replaced.

Fourthly, there is provided a blade cartridge to prevent a safety accident when handling the damaged broken blades.

1 is an exploded perspective view showing a conventional rotary cutter;

Figure 2 is an operation of the rotary cutter shown in Figure 1,

Figure 3 is an exploded view showing a rotary cutter having a blade cartridge according to the present invention

Perspective,

4 is a cross-sectional view of the blade cartridge,

5a and 5b is a schematic view showing the protective cover opening and closing state of the cartridge,

6A is a cross-sectional view taken along the line A-A of FIG. 5A;

6B is a cross-sectional view taken along the line B-B in FIG. 5B;

Figure 7 is an exploded perspective view showing another embodiment of the present invention blade cartridge and cutter,

Figure 8a shows a state in which the blade is open in the assembled state of the cutter of Figure 7

Floor plan,

Figure 8b shows a state in which the blade is protected in the assembled state of the cutter of Figure 7

Top view.

* Explanation of symbols for main parts of the drawings

100 cartridge 110 top cover

111 Boss 112,122 Guy Guide

120 Lower cover 130 Protective cover

140 ... blade 150 ... sleeve

300 ... grip 310 ... keyway

400 top cover 402 boss

407 Height 500 Bottom Cover

501 ... Adjustment knob 600 ... Bolt

The blade cartridge of the present invention to achieve the above object has a predetermined internal space, the cover unit having an open part of the opening;

A circular blade rotatably received in the cover unit, the portion of which is exposed through the opening;

And a protective cover slidably coupled to the cover unit to open and close the opening.

The cover unit has an upper cover formed with a boss rotatably supported by the blade, a lower cover formed with a through hole through which the boss is penetrated, and the boss is screwed into the boss to friction between the blade and the upper / lower cover. It has a structure including a nut for adjusting the contact force.

And a sleeve is further provided between the boss and the blade, the wear of the boss is prevented.

In addition, the outer surface of the upper / lower cover is formed with an arc-shaped guide ribs, respectively, the protective cover is formed with a locking rib slidably coupled to each of the guide ribs.

In addition, the blade cartridge of the present invention to achieve the above object is provided with a boss rotatably supported by the blade in the center, the arc-shaped first guide ribs are formed on the edge, the upper cover having a first open portion to expose the blade and ;

The lower portion is rotatably coupled to the upper cover, a hollow adjusting knob is formed at the center of the outer surface thereof, and has a second guide portion corresponding to the first guide rib and a second opening portion corresponding to the first opening portion. With cover;

It characterized in that it comprises a; bolt and nut for coupling the upper / lower cover through the adjustment knob and the boss.

On the other hand, the present invention rotary cutter to achieve the above object is a circular blade;

An upper cover having a boss rotatably supported by the blade, a lower cover coupled to the upper cover to form a predetermined internal space, and a through hole through which the boss penetrates, and screwed to the boss to form a blade / A cover unit having a nut for adjusting a frictional contact force between the lower cover, the cover unit having an open portion thereof;

And a grip detachably coupled to the upper cover by a predetermined coupling means.

The coupling means may have a structure in which a coupling rib is formed at one side of the upper cover, and a coupling groove in which the coupling rib is slidably coupled to an end of the grip.

In addition, the coupling means may have a structure in which a key of a predetermined shape is formed on one side of the upper cover, and the key groove is formed at the end of the grip and the key groove is rotated and locked while the key is entered.

According to the above characteristics of the present invention, the blade cartridge of the present invention and the rotary cutter employing the same can be used to prevent the injury by closing the exposure of the blade as a protective cover when the protective cover is not used, and to replace the blade. If you do, remove the cartridge from the grip and replace the entire cartridge to simplify the replacement.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to Fig. 3 showing the rotary cutter employing the blade cartridge 100 according to the present invention as a schematic separation perspective view and to Fig. 4 showing the engagement cross section of the blade cartridge 100, it has a predetermined internal space, and a part thereof A cover unit having an open opening 115; A circular blade 140 rotatably received in the cover unit, the portion of which is exposed through the opening 115; It is coupled to the cover unit slidably and the protective cover 130 for opening and closing the opening 115; is provided.

The cover unit has a top cover 110 formed with a boss 111 rotatably supported by the blade 140, and a through hole 121 coupled to the top cover 110 and through which the boss 111 is formed. A nut 160 is screwed to the lower cover 120 and the boss 111 to adjust the frictional contact force between the blade 140 and the upper / lower cover 110 and 120. At this time, the upper / lower cover 110, 120 is formed of a synthetic resin and can be elastically deformed by tightening the nut 160, friction with the blade 140 while deforming the upper / lower cover 110, 120 The rotational resistance of the blade 140 can be adjusted by changing the contact force.

In addition, the sleeve 150 is coupled to the boss 111 to prevent wear of the boss 111 during rotation of the blade 140 so that the life may be extended.

And the outer surface of the upper and lower covers 110, 120 are formed with arc-shaped guide ribs 112, 122, respectively, and the protective cover 130 is slidable to the respective guide ribs 112, 122. The locking ribs 131 and 132 coupled to each other are formed. Accordingly, the protective cover 130 is capable of opening and closing the opening 115 without being separated from the upper / lower covers 110 and 120. Here, the protective cover 130 can be fixed in a closed position for closing the opening 115 as shown in Figure 5a and in an open position for opening the opening 115 as shown in Figure 5b, As shown in FIGS. 6A and 6B, protrusions 130a are formed on the inner circumferential surface of the protective cover 130, and recesses 120a and 120b and 110a and 110b are respectively formed on the outer surfaces of the upper and lower covers 110 and 120, respectively. It is preferable to form. At this time, the protrusion 130a of the protective cover 130 can be locked / unlocked elastically in the recess.

On the other hand, the cover unit is detachably coupled to the grip 200 by a predetermined coupling means, this coupling means coupling ribs 113 is formed on one side of the upper cover 110, the end of the grip 200 The coupling rib 113 may be configured to have a structure in which the coupling groove 210 is slidably coupled.

The blade cartridge 100 configured as described above is ultrasonically bonded to the lower cover 120 in a state in which the sleeve 150 and the blade 140 are accommodated in the upper cover 110, by combining the protective cover 130. Are assembled. The blade cartridge 100 is detachably coupled to the grip 200.

Thus, when using a rotary cutter employing a blade cartridge, as shown in Figure 5a, by rotating the protective cover 130, the blade 140 is exposed to the open portion 115, and cutting lines such as cloth Along the blade 140 is used to rotate by pressure. When the rotary cutter is not used, as shown in FIG. 5A, the opening 115 is closed as the protective cover 130 to protect the blade 140 and at the same time, to protect from injury.

If the blade is to be replaced due to wear of the blade 140 during use, the entire cartridge 100 is separated from the grip 200 to replace the entire cartridge 100.

On the other hand, referring to Figure 7 showing another embodiment of the blade cartridge and the rotary cutter according to the present invention, which is provided with a boss 402 rotatably supported by the blade 140 in the center, the arc of the edge An upper cover 400 having a first guide rib 401 and having a first open portion 408 through which a portion of the blade 140 is exposed;

It is rotatably coupled to the upper cover 400, the hollow adjustment adjusting knob 501 is formed in the center of the outer surface, the first guide rib 502 and the second guide rib 502 corresponding to the first opening A lower cover 500 having a second open portion 505 corresponding to the portion 408;

The bolt 600 and the nut 620 for coupling the upper and lower cover 400, 500 through the adjustment knob 501 and the boss 402, and has a structure.

And a wave washer (610) was provided between the nut 620 and the upper cover 400, so that the rotational resistance of the blade 140 when the nut 620 is tightened can be adjusted.

First and second locking grooves 405 and 406 and first and second stoppers 403 and 404 are formed at the front and rear ends of the first guide rib 401, respectively, and the second guide rib 502 is formed. The locking piece 503 which is selectively locked to the first and second locking grooves 405 and 406 at the front / rear end of the < RTI ID = 0.0 >), < / RTI > Is formed.

In addition, the grip 300 is detachably coupled to the upper cover 400 by a predetermined coupling means, the coupling means is a key 407 of a predetermined shape is formed on one side of the upper cover 400, the grip ( The key 407 is accessible at the end of the key 300 and has a structure in which the key groove 310 is rotated and locked while the key 407 is entered. At this time, in the state in which the key 407 enters the key groove 310, the grip 300 or the upper / lower cover 400, 500 is rotated by 90 degrees to be locked.

On the other hand, the cutting operation as shown in Figure 8a by cutting the cloth 140 or papers in a state in which the blade 140 is exposed through the first and second openings 408,505. At this time, the blade 140 is rotated while being supported by the boss 402, the rotational resistance may be adjusted according to the tightening degree of the nut 620. In addition, the locking piece 503 of the lower cover 500 is locked to the second locking groove 406 of the upper cover 400 to maintain the blade 140 in the locked state, wherein the locking piece 504 is the first The stopper 403 is stopped to prevent the locking piece 503 from being separated from the second locking groove 406.

In addition, during storage, as shown in FIG. 8B, when the adjusting knob 501 is rotated in the clockwise direction, the locking piece 503 is separated from the second locking groove 406 and the upper surface of the first guide drib 401 is removed. After sliding on the first locking groove 405 is locked. At the same time, the locking piece 504 is stopped by the second stopper 404 via the first opening 408. In this state, the blade 140 exposed to the opening 408 is protected by the second guide rib 502.

On the other hand, if you want to replace the blade due to wear of the blade 140, etc. during use, the upper and lower cover 400, 500 is separated from the grip 300 to replace.

The present invention as described above has the following advantages.

First, in contrast to the conventional hassle of disassembling the pivot and nut, etc. during the replacement operation of the blade, the replacement operation of the blade is easy and the working time can be significantly shortened by replacing the entire cartridge containing the blade.

Second, by adopting a protective cover on the cartridge or by using a second guide rib for blade protection on the lower cover, it is protected from injuries caused by the blade at the time of replacement and can be safely exchanged. The blade can be protected from back.

Third, the replaced cartridge is stored or damaged in a state where the blade is protected by a protective cover to prevent a safety accident.

Claims (10)

A cover unit having a predetermined internal space and having an open portion thereof open; A circular blade rotatably received in the cover unit, the portion of which is exposed through the opening; Blade cover, characterized in that provided with; the cover is slidably coupled to the cover unit to open and close the opening. The cover unit of claim 1, wherein the cover unit comprises: an upper cover having a boss rotatably supported by the blade, a lower cover coupled to the upper cover, and a through hole through which the boss penetrates, and screwed to the boss. Blade cartridge characterized in that it comprises a nut for adjusting the frictional contact force between the blade and the upper, lower cover. The blade cartridge of claim 2, wherein a sleeve is further provided between the boss and the blade. According to any one of claims 1 to 3, wherein the upper and lower cover is formed with an arc-shaped guide ribs on the outer surface, respectively, the protective cover is characterized in that the locking ribs are slidably coupled to each of the guide ribs. Blade cartridge made. A boss having a blade rotatably supported at the center thereof, an arc-shaped first guide rib formed at the edge thereof, and an upper cover having a first open portion at which the blade is exposed; The lower portion is rotatably coupled to the upper cover, a hollow adjusting knob is formed at the center of the outer surface thereof, and has a second guide portion corresponding to the first guide rib and a second opening portion corresponding to the first opening portion. With cover; Blade and cartridge, characterized in that it comprises a; bolt and nut for coupling the upper / lower cover through the adjustment knob and the boss. The blade cartridge of claim 5, wherein a wave washer is further provided between the nut and the upper cover. According to claim 5 or 6, First and second locking grooves and the first and second stoppers are formed in the front and rear ends of the first guide ribs, respectively, A blade cartridge, characterized in that the locking piece is selectively locked to the first and second locking grooves and the locking piece is stopped on the first and second stoppers. Circular blades; An upper cover having a boss for rotatably supporting the blade, a lower cover coupled to the upper cover to form a predetermined internal space, and having a through hole through which the boss penetrates, and a portion of the blade is opened to open a portion of the blade. A cover unit having an open portion exposed; And a grip detachably coupled to the upper cover by a predetermined coupling means. The rotary cutter of claim 8, wherein the coupling means has a coupling rib formed at one side of the upper cover, and a coupling groove formed at an end of the grip to slidably engage the coupling rib. The method of claim 8, wherein the coupling means is a key of a predetermined shape is formed on one side of the upper cover, the key is formed at the end of the grip and the key groove is rotated and locked in the state the key is entered Rotary cutter, characterized in that.