WO2008066365A1

WO2008066365A1 - A safe cutter

Info

Publication number: WO2008066365A1
Application number: PCT/KR2007/006209
Authority: WO
Inventors: Won-Sang Cho
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-01
Filing date: 2007-12-03
Publication date: 2008-06-05
Anticipated expiration: 2009-06-01

Abstract

The present invention relates to the field of cutters, and more particularly to a cutter whose blade is more effectively protectred from being being bent and snap off. The cutter of this invention includes a specially designed blade guard slide which moves along on the back of the blade, covering and backing the back of the blade.

Description

TITLE OF INVENTION A SAFE CUTTER

[Technical Field]

This invention is about a cutter, that is, about a cutter with a specially designed back(3) which can slide along the back of the blade, surrounding and backing the part to prevent the blade from easily bending and breaking while being used.

[Background Art]

The traditonal cutter as in Fig.2, dosen't have the back which backs the back of the blade(l), so it tends to be easily bent and broken, especilly along the grooves(2) which are formed diagonally on the surface of the blade, causing the danger of hurting the hand, etc. and inconvenience, while being used

[Disclosure]

[Technical Problem]

To work the problem out, this invention aims at providing a cutter which is safer and more convenient because of its blade which is protected from being bent and broken easily while being used.

[Technical Solution]

To accomplish such an aim, the cutter of this invention is equipped with specially designed back(3) which can back the back of the blade by surrounding the part and a case(6) with a si it(5) formed on the upper side of it: through the hole(5) the button(Bl) fixed on the rear upper part of the back(3) can slide along. So after the blade of the cutter is pushed forward from the front of the■ ease(6) by pushing the button(Bl) forward along the slit(4), if you push the button(B2) forward along the si it(5), the back(3) slides forward along the upper side of the back of the blade, surrounding and backing the part, that is, the upper side of the back of the blade. Howerever, as in the Fig. 11, there can be a gap between the back(3) and the upper part of the blade while the cutter is being used. To prevent such occasion, this invention takes the following two steps.

First step- as in Fig. 13, the spring(S) supports the blade so that the blade does not droop but stay raised upward, making the upper part of the blade attached closely to the back(3).

The second step: as in Fig. 17, the upper part of the blade(3) is fixed with small magnets(M) so that the back(3) and the upper part of the blade are not seperated, making them attached more closely each other by their magnetism.

On the other hand, in case of the button(B) of the traditional cutter, the blade is pushed closely to the inner part of the slit(4) of the case so that there is not enough space for making the upper part of the blade stay in the center of the si it(5) in stallation of the back(3).

The Fig.40 as in Fig.39, shows the layout of the back(3), the blade, and the button(Bl) when the button(Bl), the blade, and the back are installed in the case.

The shaft(lθ) of the blade button(Bl) in the Fig.40 as in the Fig.43 turns right by the distance of A' and then turns left. This type of blade button also makes it easier to mount the upper part of the blade in the center of the inner part of the blade guard slide when the blade, blade button, and the blade guard are to be mounted on the case.

On the other hand, when the upper part of the blade is higher than the upper part of the blade guard slid when the blade button is wide or the blade is narrow, the upper part of the blade button and the blade guard slide clash eacher, hindering both the passage of the blade button along the blade button slot and the passage of the blade guard slide along blade guard slide button slot. But when the shaft of the blade button turns right by the distance of A^' and then turns left like the typs of blade button as in the Fig. 43 or Fig.44, it makes easier both the passage of the blade button along the blade button slot and the passage of the blade guard slide along the blade guard slide slot even when the upper part of the blade is higher than the lower part of the blade guard slide as in the Fig.41, preventing their clash.

In the Fig.45 as in the Fig.42, the shaft(lθ) of the blade button is placed backwars by the distance of A^' from the blade button, which makes it easier for the upper part of the blade to be placed in the center of the blade guard slide as in the Fig.39 and the end part of the extended shaft has an arm(9) for supporting the blade by its elasticity as in the Fig.23 or Fig 30 so that the blade does not droop and the upper part of the blade does not become seperated from the blade guard.

The Fig.47 shows the positions of the blade, the blade button, and the blade guard slide when they are mounted on the case as in Fig.39, Fig.40, and Fig.41.

The blade button in the Fig.47 as in the Fig.48, differently from the types as shown above thus far, has an arm with it end(7) in the opposit direction(16).

In the case of the traditional blade button, as explained above, when the blade, the blade button, and the blade button slide are to be mounted on the case, the blade is pushed closely to the blade button slot, which makes it difficult for the upper part to be placed in the center of the blade guard slide(3). And when the upper part of the blade button is higher than the lower part of the blade guard slide, it can hinder the passage of the blade button along the blade button slot and the passage of the blade guard slid along the blade guard slid button slot(7), crashing each other and hindering their passages.

But when the type of blade button as in Fig.48 is used, it is easier to make the upper part of the blade placed in the center of the blade

guard slide button slot, and even when the upper part of the blade button is higher than the lower part of the blade guard slide, it can make the blade button move along the blade button slot freely and the blade guard slide move along the blade guard slide button slot freely without their crashing each other.

In the Fig.49, the same principles in Fig.47 and Fig.48 are applied, but the blade button as in Fig. 51, different from the type of blade button as in Fig.48, has an arm(9) at the end of the extended shaft which supports the blade so that it does not droop.

To give more detailed explanation of the cutter as in the Fig.49, the blade button pivot(7) and the blade button arm(9) as in Fig. 51 was mounted on the two holes, that is, the blade button pivot hole(Kl) and the blade button arm hole(K2) as in the Fig.50, on the case as in Fig. 53. (The blade as in Fig. 50 is the same as the blade in Fig.14 in type).

The cutter in the Fig.67 has a blade guard slide which surrounds and backs the back of the blade so that the blade may not be bent or broken easily; the blade button has not only its pivot but also its arm which supports the blade so that it may not droop! the blade button has its pivot and its arm in the opposit direction so that even when the upper part of the blade button is higher than the lower part of the blade guard slide on the case because of the wide button or the narrow blade, the blade button moves freely along the blade button slot and the blade guard slide moves freely along the blade guard slide button slot, preventing the their clash one another.

When compared with the cutter in the Fig.49, the cutter case described in the Fig. 68 has its upper seperaton rail(20) and its lower seperation rai 1(19) ; The upper seperation rail(20) seperates the upper passage(R6) of the blade button from the passage of the blade guard slide(R5), and the lower seperation rai 1(19) seperates the passage(R4) of the lower part of the blade button from the passage(R3) of the lower part of the blade so that the blade guard slides moves along the passage(Rδ) more stablely and the lower part of the blade moves along the passage(R3) more stablely.

[Advantageous Effects]

As described above, the cutter by this invention has a blade guard slide(3) which moves along the upper part of the blade, surrounding and backing the section which needs to be backed; the spring and the arm mounted on the blade button and the magnets mounted on the blade guard slide(3) make the upper part of the blade stay attached closely to the blade guard slide without being seperated eacher other so that the blade does not bend or break easily, preventing the face or the eyes from being hurt by the flying broken pieces of the bladeb and helping use the cutter more safely and conveniently. The blade buttons as in Fig.43, Fig.44, Fig.45, and Fig.46 make the upper part of the blade stay placed in the center of the blade guard slide, and help prevent the upper part of the blade button from colliding with the blade guard slide, so making them move more easily.

The buttons as in the Fig 48 and the Fig 51 have their blade button pivots and blade button arms in the opposition direction differenltly from the other typs of the blade buttons above, which helps the upper part of the blade stay in the center of the blade guard slide; and even when the blade button is wide or the blade is narrow, such buttons prevent the upper part of the blade button from colliding with the blade guard slide, helping their passages easier.

Brief Description of the Drawings

Fig. 1 depicts the cutter by this invention Fig. 2 depicts a traditional cutter. Fig.3 depicts a blade. Fig.4 depicts the blade guard slide and its button at the end

Fig.5 depicts a blade of which back is backed by a blade guard slide.

Fig.6 depicts the cutter case by this invention, which has not only a blade button slot(4) but also a blade guard slide button slot.

Fig.7 depicts a cutter case(6) on which a blade guard slide is mounted so that the blade guard slide can move backwards and forwards

Fig. 8 depicts a cutter on whose case a blade and a blade guard slide is mounted.

Fig.9 depicts the blade pushed forwards from the front of the cutter by pushing the blade button forwards from the state of the cutter in

Fig.8.

Fig. 10 depicts the blade guard slide pushed forward by pushing the blade guard slide button, surrounding and backing the back of the blade, from the state of the Fig.9.

Fig. 11 depicts the blade drooped from the blade guard slide while being used from the state of the Fig. 10.

Fig. 12 depicts the state of the blade in which the front of it droops.

Fig. 13 depicts the state of the blade in which a spring supports the blade so that the blade may not droop and stay raised up.

Fig. 14 depicts the blade by this invention, which has not only the blade button pivot hole(Kl) but also the blade button arm hole(K2).

Fig. 15 depicts the sρring(S) alone from the Fig. 13.

Fig. 16 depicts a blade button alone.

Fig. 17 depicts magnets which are mounted on the blade guard slide of the cutter.

Fig. 18 depicts the way the magnets from the Fig.17 are mounted on the part of the blade guard slide.

Fig. 19 depicts a cutter by this invention whose blade is pushed forward, surrounded and backed by the blade guard slide; the blade guard slide and the upper part of the blade are attached closely by the spring(S) and magnets(M).

Fig.20 depicts the state of the cutter in which its blade and the blade guard slide is pushed into the case.

Fig. 21 shows the state in which a spring supports the lower part of the blade.

Fig. 22 shows the state in which the blade button arm supports the lower part of the blade.

Fig. 23 depicts a blade button which has not only a pivot but also an arm.

Fig. 24 depicts a blade on which the edge was not formed at the later lower part.

Fig.25 depicts a blade on which the edge was not formed at the later lower part and whose end is rectangular.

Fig.26 depicts a blade on which the edge was not formed at the later lower part and whose end is curvi lineal.

Fig. 27 depicts the state in which the blade is supported by a blade button arm.

Fig. 28 depicts a blade on which a groove is formed at the later lower part.

Fig. 29 depicts the blade on which the blade button was mounted, supporting the blade.

Fig.30 depicts a blade button which has not only a pivot but also an arm.

Fig.31 depicts a blade which has not only a blade button pivot hole but also a blade button arm hole, and whose later lower part is not formed of an edge.

Fig.32 depicts a blade which has not only a blade button pivot hole but also a blade button arm hole, and whose later lower part is not formed of an edge, and is rectangular at the end.

Fig.33 depicts a blade which has not only a blade button pivot hole but also a blade button arm hole, and whose later lower part is not formed of an edge, and is curvi lineal.

Fig.34 depicts the blade is mounted on the blade button as in the

Fig.35.

Fig.35 depicts a blade button whose arm is situated behind the blade button pivot.

Fig.36 depicts the state in which the blade button of the Fig.35 is mounted on the blade of the Fig.37.

Fig.37 depicts a blade on which a groove is formed at the end.

Fig.38 depicts a blade on which a groove is formed at the end which is right-angled.

Fig.39 depicts the state in which the blade button of the Fig 42 and a blade guard slide is mounted on the blade if they are mounted on the assumption that they were mounted on the case.

Fig.40 depicts the state in which the blade button of Fig.43 is mounted.

Fig.41 depicts the state in which the blade button is wider, compared with that in the Fig.40.

Fig.42 depicts a blade button whose shaft is pushed back by the distance of A¹.

Fig.43 depicts a blade button whose shaft is pushed back by the distance of A'

Fig.44 depicts a blade button whose shaft is pushed back by the distance of A'

Fig.45 depicts a blade button whose shaft is pushed back by the distance of A¹ and it also as an arm at the front.

Fig.46 depicts a blade button whose shaft is pushed back by the distance of A¹ and it also as an arm at the front.

Fig.47 depicts the state in which the blade button of Fig.48 and the blade guard slide is mounted on the blade.]

Fig.48 depicts a blade button whose pivot is in the opposite direction ,compared with the traditonal ones. Fig.49 depicts a state in which the blade of the Fig.50 and the blade button of the Fig. 51 is mounted as in the Fig 52, which is mounted again on the case as of Fig. 53.

Fig. 50 depicts a blade button has not only a blade button pivot hole but also a blade button arm hole is formed.

Fig. 51 depicts a blade button whose blade button pivot and blade button arm is formed in the opposite direction.

Fig. 52 depicts a blade button on which a blade button as of Fig.51 is mounted.

Fig. 53 depicts a cutter case

Fig. 54 depicts the horizontal cross section of the upper part of the cutter case of the Fig. 53

Fig. 55 depicts the horizontal cross section of the lower part of the cutter case of the Fig. 53

Fig. 56 depicts the vertical cross section of the cutter case of the

Fig. 53

Fig. 57 depicts a cutter which was composed of the case as of Fig. 58 and the brade and a blade button as of 52; the blade button is mounted on the blade

Fig.58 depicts a cutter case which has a separation rail at the lower part.

Fig. 59 depicts the horizontal cross section of the upper part of the cutter case of the Fig. 58.

Fig.60 depicts the horizontal cross section of the lower part of the cutter case of the Fig.58.

Fig.61 depicts the vertical cross section of the cutter case of the

Fig. 58.

Fig. 62 depicts a cutter which is composed of the cutter case as of

Fig.63, the blade and the blade button af of Fig.52

Fig.63 depicts a cutter case which has a seperation rail at the upper inner part . Fig.64 depicts the horizontal cross section of the upper part of the cutter case of the Fig. 63

Fig.65 depicts the horizontal cross section of the lower part of the cutter case of the Fig.63.

Fig. 66 depicts the vertical cross section of the cutter case of the

Fig.63.

Fig. 67 depicts a cutter which is composed of the case as as of 68, a blade and the blade button: the blade button is amounted on the blade as of the Fig. 52.

Fig.69 depicts the horizontal cross section of the upper part of the cutter case of the Fig.68.

Fig. 70 depicts the horizontal cross section of the lower part of the cutter case of the Fig. 68.

Fig. 71 depicts the vertical cross section of the cutter case of the

Fig. 68.

Fig.72 depicts a cutter case which has seperation rails at the lower and upper part .

Fig. 73 depicts the vertical cross section of the cutter case of the

Fig. 72.

Fig. 74 depicts a cutter case whose back juts out compared with the one of the Fig.72.

Fig. 76 depicts the blade guard slide and its button on which a spring is fixed.

Fig.77 sescribes the blade guard slide and its button on which a spring is fixed at the side.

Fig. 78 depicts the blade guard and its button on which a lock is mounted at the side. [Best Mode]

The cutter in the Fig. 67 has a blade guard slide which surrounds and backs the back of the blade so that the blade may not be bent or broken easily; the blade button has not only its pivot but also its arm which supports the blade so that it may not droop; the blade button has its pivot and its arm in the opposit direction so that even when the upper part of the blade button is higher than the lower part of the blade guard slide on the case because of the wide button or the narrow blade, the blade button moves freely along the blade button slot and the blade guard slide moves freely along the blade guard slide button slot, preventing the their clash each other.

When compared with the cutter in the Fig. 49, the cutter case described in the Fig. 68 has its upper seperaton rail (20) and its lower seperation rail (19); The upper seperation rail(20) seperates the upper passage(R6) of the blade button from the passage of the blade guard slide(R5), and the lower seperation rail(19) seperates the passage(R4) of the lower part of the blade button from the passage(R3) of the lower part of the blade so that the blade guard slides moves along the passage(R5) more stablely and the lower part of the blade moves along the passage(R3) more stablely.

[Mode for Invention]

Now, I shall give more detailed explanation about the invention by reference to the figures.

Fig. 1 is the general view of the cutter by this invention; the blade sticks out from the cutter case when the blade button(Bl) was pushed forward and then the blade guard slide(3) slides forward over the back of the blade from the front of the cutter case when the blade guard slide button(B2) was pushed forward, surrounding and backing the back of the blade. To prevent the gap between the blade guard slide(3) and the back of the blade while in use, the upper part of the blade is attached to the blade guard slide(3) by the supporting spring which was fixed on the blade button, and the magnets on the top of the blade guard slide reinforce the attachment, and thus the blade can be protected effectively from being bent or borken easily while in use. The following is more detailed explanation about the structure of the cutter and how it functions.

The fig. 2 depicts the convenional cutter. Whenever possible, the same reference numbers will be used throughout the drawings and the following description to refer to the same or like parts.

The traditional cutter as of the Fig. 2 tends to bend and snap off easily, escepicially at the narrow lines(2) carved diagonally at intervals on the surface of the blade(l), which may cause inconvenience or the danger to hurt the hand.

If a blade guard slide(3) as of the Fig is mounted on the back of the blade(l) as of the Fig.3, as the Fig of 5, the mounted ρart(R2) is less subject to the break than the other part(Rl) of the blade even when the blade is pushed aside to some degree.

In carrying out the invention, the blade guard slide as of the Fig.4 and Fig. 5 is mounted on the specially designed cutter case as of the Fig.6, as the Fig.6, thus, if the blade guard slide button(B2) is pushed back and forth along the blade guard slide button slot(5), the blade guard slide(3) moves back and forth accordingly. After the blade guard slide(3), the blade and the blade button(Bl), is mounted on the cutter case, if the blade button(Bl) is pushed forwrds, the blade moves forwards, too, from the front of the cutter case(6) as of the Fig.9. (The pivot(7) of the blade button as of the Fig. 16 is inserted into the hole(Kl), and then they are placed in the cutter case(6) as of the Fig.6 with the blade button(Bl) mounted on the blade button slot(4) of the cutter case, and then the blade guard si ide(3) is placed in the cutter case with the blade guard slide button mounted on the blade guard slide button slot(5)). At this stage, the state of the cutter(that is, as of the Fig.9) is not different from the state of the traditional cutterCas of the Fig.2) whose blade sticks out from the front of the cutter after the blade button(Bl) was pushed forward and is subject to being bent and snapping off.

Continued from the state of the Fig.9, if the blade guard slide button(B2) is pushed forwards along the blade guard slide button slot, the blade guard slide(3) slides over the back of the blade protruded from the front of the cutter case(6), surrounding and backing the back of the blade as in the Fig. 10.

As in the state of Fig. 10, that is, in a state that the blade guard slide(3) surrounds and backs the back of the blade, the blade can be protected from being bent and snapping off.

But when the cutter is used as in the state of Fig. 10, there can be a gap between the blade guard slide button(3) and the blade as in the Fig. 11, and thus the blade guard slide(3) can not surround and back the back of the blade effectively, being left in an unstable state, and thus causing inconvenience. Such occasion may arise, for instance, when the pront part of the blade droops on the pivot(7) of the blade button because of gravity as in the Fig. 12, and thus there can be a gap as the back of the blade is seperated from the blade guard slide(3). To prevent such a gap between the back of the blade and the blade guard slide(3), this invention takes the following two steps.

First step: in order to prevent the front part of the blade from drooping and keep it raised as of the Fig. 14, this invent uses a specially designed blade as of the Fig. 14, which has not only a blade button pivot hole(Kl) but also the blade button arm hole(K2); the blade button arm(7) of the Fig 16 is inserted into the blade button pivot hole and the hole of loop of the spring(S) as in the Fig. 15 and then one end of the spring(S) is inserted into the blade button arm hole(K2) and the oter end is fixed on the blade button(Bl); the front part of the blade is supported by the spring so that the front part of the blade is not seperated from the blade guard slide but kept attached more closely each other.

As described above, if the front of the blade is supported by the spring(S) and is kept raised, the damage to the blade edge which was brought abut as it scratches the lower part of the cutter case. Second step: A few magnets(M) are fixed on the blade guard slide(3) as in the Fig. 17 so that the back of the blade does not droop from the blade guard slide by gravity, kept attached more closely to each other .

As depected above, the cutter of this invention as of the Fig. 19 is more convenient and safe to use because the blade guard slide(3) surrounds and backs the back of the blade and to prevent the back of the blade from dropping from the blade guard slide(3), two steps are taken: First step - the torshion spring(S) fixed on the blade button supports the blade so that the back of the blade is attached more closely to the blade guard slide(3), Second step - the magnets(M) fixed on the top of the blade guard slide(3) helps preventing the blade from dropping from the blade guard slide(3), keeping attached more closely each other.

In connecting the torshion spring by inserting one end of it into the blade button arm hole(K2) to support the blade, the position of the blade button arm hole(K2) on the blade is not fixed but can be altered according to circumstances (for example, the postion can be behind the blade button pivot hole(Kl) or on either side of it). And instead of the blade button arm hole(K2), a groove can be made on the edge of the blade to support the blade. When the magnets(M) are fixed on the blade guard slide(3) to prevent the gap between the blade guard slide and the back of the bladeCas of Fig 17 or Fig 18), the number of the magents, the shape of the magnets, or the position on which the magnets are fixed is not fixed but can be altered according to the structure of the cutter. The Fig.21 like the Fig. 13 depict a blade which is supported by a spring to prevent its drooping. However, the manner in which the blade is supported by the spring as of the Fig. 21 is different from that of the Fig. 13. The blade of the Fig. 13 is supported by the spring whose end is inserted into the blade button arm hole while the blade of the Fig.21 is supported by the spring which support the bottom of the blade, that is, the edge of the blade directly, without the need of the special blade buttom arm hole on the blade. The edge of the blade of the Fig. 22 is supported by the blade button arm(9) instead of the spring(S), different from the manner in which the blade is supported as in the Fig.21; the blade button of the Fig. 23 has not only its blade button pivot(7) but also the blade button arm(9) which supports the blade by its elasticity. As described above, the blade button of the Fig. 23 has both the blade button pivot(7) and the blade button arm(9) on it self, forming one body; the blade button arm(9) like the spring supports the blade by its elasticity. The blade of this type of blade button which has not only its blade button pivot but also a blade button arm in a body can be more simply replaced and can be producted in more simple process and thus contrubutes to reducing the cost.

As for the blade of Fig. 24, there is a section(ll) around under the blade button pivot hole(Kl) on which the edge is not formed, which can protect the blade button arm(9) from being damaged as it lift the bladeCas of the Fig.3) directly and can make the user replace the blade more safely and conveniently without being hurt of the hand. The blade of the Fig. 25, like that of the Fig. 24, has a sectin(ll) around under the blade button pivot hole(Kl) on which the edge is not formed, which can protect the blade button arm(9) from being damaged as it lift the blade and can make the user replace the blade more safely and conveniently without being hurt of the hand. In addition, the rear part of the blade meets at right angles, which provides more enough space on which the blade button pivot hole can be make. The blade of the Fig. 26, like that of the Fig.25, has a sectin around under the blade button pivot hole on which the edge is not formed and the rear part of the blade of the Fig.26 is curvi lineal, which can make the blade whose blade button pivot(7) is inserted into the blade button pivot hole(Kl) turn up and down smoothly, reducing the friction when the rear part of the blade(13) touches the blade button.

In the Fig.27, as in the Fig.22, the blade button arm(9) supports the edge of the blade directly; the blade of the Fig.27 like that of the Fig.28, has a groove(14) at the lower part of the blade so that the blade button arm is placed inside the groove more stably, supporting the blade more effectively; unlikely as in the Fig.22, the blade button arm does not stick out dowanwards from the bottom(edge) of the blade but remains in the groove(14), preventing the friction between the blade button arm(9) and the lower part of the cutter cas and making it slide more smoothly when the blade is fushed back and forth in the cutter case.

The shape of the groove formed at the bottom of the blade in which the blade button arm is placed as in the Fig. 28 can be various, for example, right angle, crescent, and other shapes which can support the bottom of the blade more stably.

In the Fig. 29 as in the Fig. 13 or Fig. 14, the blade has two holes((Kl), (K2)); the blade button ρivot(7) of the Fig.30 is inserted into the blade button pivot hole(Kl) and the blade button arm(7) is inserted into the blade button arm hole; when compared with the Fig. 13, the blade button has not only a blade button pivot but also the blade button arm as in a body; with this type of button like the blade button of the Fig.23 the blade can be simply replaced and the simple process of production or assembling can reduce the manufacturing cost.

The blade of the Fig 31 can be also mounted on the blade button of the Fig 30; as in the Fig.24, the later lower part of the blade is not formed of the edge, which make the user replace the blade by holding it more safely and conveniently.

[Industrial Applicability] The present invention is industrially applicable

Claims

[CLAIMS]

[Claim 1]

A cutter, including: a blade guard slide(3); and a blade guard slide button(B2) fixed on the top of the rear of the blade; and a cutter case; wherein the blade guard slide and the blade guard slide button is mounted on the cutter case wherein the blade guard slide surrounds and backs the back of the blade to prevent the blade from being easily bent or be snapped off.

[Claim 2]

The cutter of claim 1, wherein the cutter case has a blade guard slide button slot(5) on the top of the cutter case through which the blade guard slide can move back and forth; grooves are made on one side or both sides of the blade guard slide button slot in the forms of wave or right angle

[Claim 3]

A cutter having a spring(S); wherein the spring is connected to both the blade button(4) and the blade to support the blade by its elasticity to prevent the upper part of the blade(3) from being seperated from the blade guard slide so that the blade does not droop but stays kept upwards.

[Claim 4]

The cutter of claim 3, wherein the blade button has a blade button arm on itself instead of the spring so that the blade button arm(9) can support the blade.

[Claim 5]

A cutter having one or more than one magnets on the top of the blade guard slide; wherein the magnets prevent the upper part of the blade from being seperated from the blade guard slide.

[Claim 6]

The cutter of claim 3, wherein the blade has not only a blade button pivot hole(Kl) but also the blade button arm hole(K2) on it to which a spring is connected to support the blade.

[Claim 7]

The cutter of claim 6, wherein the blade has one groove(14) or more than one grooves at the lower part the blade; the spring or the blade button arm is placed in the groove to support the lower part of the blade by their elasticity

[Claim 8]

The cutter of claim 7, wherein the blade has a groove(15) at the rear of it so that the blade button arm is placed in the groove to support the blade.

[Claim 9]

A cutter having a blade; wherein the blade has a section having no edge around under the blade button pivot hole.

[Claim 10]

A cutter having a blade", wherein the rear of the blade is right-angled.

[Claim 11]

A cutter having a blade; wherein the rear(13) of the blade is curvilinear.

[Claim 12]

A blade button(35) having a blade button arm(9); wherein the blade button arm is placed behind the blade button pivot(7).

[Claim 13]

A blade button(42) having a blade button shaft(lθ); wherein the blade button shaft is placed back by the distance of A from the blade button.

[Claim 14]

A blade button(43) having a shaft; wherein the shaft of the blade button is pushed back by the distance of (A¹) and then makes a turn, which makes the top of the blade placed in the middle of the groove of the blade guard slide and thus prevents the friction between the upper part of the blade button and the blade guard slide, making their passages easy.

[Claim 15]

A blade button((48), (51)) having a blade button pivot(7) and a blade button arm(9) in the opposite direction to the traditional blade button; wherein the blade button can make the upper part of the blade placed in the middle of the groove of the blade guard slide, thus preventing the friction between the upper part of the blade button and the blade guard slide and making their passages easy.

[Claim 16] A cutter case(63) having a seperation rail(19) at the lower part of the case

[Claim 17] A cutter case(63) having a seperation rail(20) at the upper part of it

[Claim 18]

A cutter case(68) having seperation rails both at the lower part and the upper part of it respectively.

[Claim 19]

The cutter case of claim 18, wherein the seperation rails at the lower part of the case and the upper part of the case are made of a metal sheet by bending it, which simplify the manufacturing processes.

[Claim 20]

The cutter case of claim 19, wherein the cutter case has a space that protrudes at the middle part of the back side of the cutter case.

[Claim 21] A blade guard slide having a spring(S2) on it.

[Claim 22] A blade guard slide having a spring(S3) in the side of the it.

[Claim 23]

A blade guard slide having a lock fixed in the side of the blade button; wherein the lock stops the movement of the blade guard slide mounted on the blade guard slide button slot.