Scissors

Abstract

The invention provides a pair of scissors capable of suppressing, as much as possible, the occurrence of unexpected cracks at the tip of a cutting line when a paper sheet is cut. A pair of scissors (S) is provided with: a first scissor body (1) configured so as to include a first blade (11); a second scissor body (2) configured so as to include a second blade (21); and a fulcrum shaft (3) that supports the first scissor body (1) and the second scissor body (2) so as to be rotatable relative to each other in order to cut a paper sheet (P) by sliding a first blade line (e1) formed on the first blade (1) and a second blade line (e2) formed on the second blade (2). The overlapping dimension (wp) of the topmost end parts of the first and second cutting edge parts (11t, 21t) is set to a value greater than 0 and 1.0 mm or less at the most overlapping position (J) where the first cutting edge part (11t) and the second cutting edge part (21t) are most overlapped with each other in the cutting edge operation direction.

Description

Technical Field

[0001] This invention relates to scissors. Background Technology

[0002] Previously, various types of scissors were known for cutting paper and other paper products by the user's operation.

[0003] When using scissors to cut paper, it is preferable to create only neat cut lines for that type of paper.

[0004] However, in the past, such as... Figure 18 As illustrated, when a user moves the tips of the paired blades to their final positions (that is, the user moves the pair of handles for the fingers to engage with each other to a position for docking) to cut paper P, unexpected damage such as tearing or deformation can easily occur near the tips ct in the cut line c.

[0005] Of course, if there are unexpected cracks, deformations, or other damage near the tip of the cut line in paper products, it will detract from the aesthetics.

[0006] Furthermore, in the scissors disclosed in Patent Document 1, although damage to paper can be suppressed due to the open blade tip, there is a drawback that it cannot cut to the blade tip (it cannot cut paper using the blade tip). This document states that "to eliminate this drawback, it is necessary to adjust the blade tip tip position so that they are almost touching or not touching when the handle is fully gripped." However, this primarily aims to reduce the overlap between the blade tips to zero. In other words, the invention in this document does not conceive of using the blade tip to cut paper.

[0007] The inventors of this application conducted an intensive study on the cause of the aforementioned defects and found that, at least, the aforementioned defects were caused by the overlap dimension of the tip of the blade.

[0008] That is, the purpose of the present invention is to be able to cut paper even at the tip of the blade and to suppress damage such as cracks and deformation in the paper, and it is excellent in that it has discovered an upper limit value for the overlap size.

[0009] Existing technical documents

[0010] Patent documents

[0011] Patent Document 1: Japanese Utility Model Application Publication No. 52-160176 Summary of the Invention

[0012] The problem that the invention aims to solve

[0013] The present invention was made with regard to the above-mentioned situation, at least suppressing the undesirable situation that unintended cracks, deformations and other damages are easily formed near the tip of the cut line when cutting paper.

[0014] Methods for solving problems

[0015] That is, the present invention is configured as follows.

[0016] The invention described in technical solution 1 is a pair of scissors, comprising: a first scissor body, the first scissor body being configured to include a first blade having a first cutting tip at its tip; a second scissor body, the second scissor body being configured to include a second blade having a second cutting tip at its tip; and a support shaft, the support shaft supporting the first scissor body and the second scissor body to be rotatable relative to each other in order to slide a first cutting line formed on the first blade and a second cutting line formed on the second blade to cut paper, wherein at the most overlapping position of the first cutting tip and the second cutting tip in the cutting direction, the overlap dimension of the topmost points of the first cutting tip and the second cutting tip is set to a value greater than 0 and less than 1.0 mm.

[0017] According to the scissors described in technical solution 1, in the invention described in technical solution 2, the first scissor body is provided with a first handle portion for the user's fingers to engage at the base end of the first blade, and the second scissor body is provided with a second handle portion for the user's fingers to engage at the base end of the second blade. The support shaft is disposed at a position further forward than the first handle portion and the second handle portion, and the most overlapping position is determined by the docking of the first handle portion and the second handle portion.

[0018] According to the scissors described in technical solution 1, in the invention described in technical solution 3, the first cutting edge and the second cutting edge are set to a length of at least 20 mm.

[0019] According to the scissors described in technical solution 1, in the invention described in technical solution 4, at the most overlapping position, the wall thickness of the first blade tip corresponding to the first imaginary line orthogonal to the blade movement direction from the top point of the second blade line is set to 0.2mm to 0.7mm, and the wall thickness of the second blade tip corresponding to the second imaginary line orthogonal to the blade movement direction from the top point of the first blade line is set to 0.2mm to 0.7mm.

[0020] Invention Effects

[0021] As explained above, according to the present invention, it is at least possible to suppress undesirable conditions such as unexpected cracks, deformations, etc., that are easily formed near the tip of the cut line when cutting paper. Attached Figure Description

[0022] Figure 1 This is a perspective view illustrating one embodiment of the present invention.

[0023] Figure 2 This is the right view of this embodiment.

[0024] Figure 3 This is the left view of this embodiment.

[0025] Figure 4 This is a top view of this embodiment.

[0026] Figure 5 This is a bottom view of this embodiment.

[0027] Figure 6 This is the front view of this implementation.

[0028] Figure 7 This is a rear view of this embodiment.

[0029] Figure 8 This is an exploded perspective view of this embodiment.

[0030] Figure 9 This is an exploded perspective view of this embodiment.

[0031] Figure 10 This is a perspective view of this embodiment.

[0032] Figure 11 yes Figure 10 A magnified view of the top part of the image.

[0033] Figure 12 yes Figure 2 A magnified view of the top part of the image.

[0034] Figure 13 yes Figure 3 A magnified view of the top part of the image.

[0035] Figure 14 yes Figure 4 A magnified view of the top part of the image.

[0036] Figure 15 yes Figure 2 An enlarged view of the first half of the image.

[0037] Figure 16 This is a top view showing the area near the cut line on a piece of paper when the scissors used in this embodiment form a cut line.

[0038] Figure 17 This is a right view showing the state in which the blade of the scissors used in this embodiment pushes (lifts up) a portion of the paper when a cutting line is formed on the paper.

[0039] Figure 18 This is a top view showing the area near the cut line of a type of paper when a cut line is made using conventional scissors (as in the case shown above). Figure 16 (Corresponding top view).

[0040] Figure 19 This is a right view showing the state where the blade of a pair of scissors, used in a conventional case, pushes a portion of the paper upwards when a cutting line is made on it. Figure 17 (Corresponding right view).

[0041] Explanation of reference numerals in the attached figures

[0042] 1…First Cut

[0043] 11…First blade

[0044] e1…First cutting line

[0045] 12…First handle

[0046] 2…Second scissor

[0047] 21…Second blade

[0048] e2…Second cutting line

[0049] 22…Second handle

[0050] 3… Support shaft

[0051] P…paper products

[0052] c…cutting line

[0053] D…damage such as cracking and deformation

[0054] r…blade movement direction

[0055] wp…overlap size Detailed Implementation

[0056] The following is for reference Figures 1 to 17 An embodiment of the present invention will be described.

[0057] Figure 18 This is a top view showing an example of a state in which damage D is formed near the tip ct of a cutting line c on a type of paper P when a cutting line c is made using conventional scissors.

[0058] Figure 19It is a right view showing a state in which a part p1 of the paper material P is pushed upward by the first blade 11x when forming a cut line c on the paper material P using a conventional pair of scissors Sx. Here, the reference numerals of the conventional pair of scissors Sx are obtained by adding "x" after the reference numerals used in the present embodiment.

[0059] In this embodiment, the present invention is applied to a pair of scissors S suitable for use in offices and homes. The pair of scissors S is suitable for uses such as cutting paper and other paper materials P.

[0060] In particular, the pair of scissors S of this embodiment is suitable for uses such as making paper crafts (English: papercraft) (Japanese: kami-saiku), paper cutting, etc., that is, uses with a high expectation of appropriately maintaining the appearance near the cut line c formed on the paper material P.

[0061] The pair of scissors S includes: a first body 1 as one side body; a second body 2 as the other side body; and a support shaft 3 that supports the first body 1 and the second body 2 so as to be relatively rotatable in order to slide the first cutting edge e1 and the second cutting edge e2 relative to each other to cut paper and other paper materials P. The first cutting edge e1 is a cutting edge that functions as a cutting end edge formed on the first blade 11, and the second cutting edge e2 is a cutting edge that functions as a cutting end edge formed on the second blade 21.

[0062] The pair of scissors S can move around the support shaft 3 between an open position (not shown) and a final cutting position (A). The open position is a position where the first blade tip 11t, which is the tip (blade tip) of the first body 1, is separated from the second blade tip 21t, which is the tip (blade tip) of the second body 2, and the paper material P to be cut can be disposed between the first blade tip 11t and the second blade tip 21t. The final cutting position (A) is a position that constitutes the most overlapping position (J), and the most overlapping position (J) is the position where the first blade tip 11t and the second blade tip 21t overlap each other the most in the blade movement direction r.

[0063] Hereinafter, the pair of scissors S will be described in detail.

[0064] <<First body 1>>

[0065] The first body 1 includes a first blade 11 made of metal and a first handle 12 provided at the base end portion 11k of the first blade 11 for a user's finger to engage.

[0066] <First blade 11>

[0067] The first blade 11 is located below the paper material P when cutting the paper material P. The first blade 11 has a stainless steel plate as a metal plate as a base material. The first blade 11 is formed by stamping.

[0068] Furthermore, in the first blade 11, at least the first blade tip 11t constituting the top of the first blade 11 is ground until a predetermined thickness w1 is obtained.

[0069] The first cutting edge 11 has a first cutting line e1 formed between its flat back edge 11b, which can slide with the second cutting edge 21, and its cutting surface 11s, which is the side facing opposite to the second cutting edge 21.

[0070] More specifically, the first cutting line e1 of the first blade 11 is formed between the back edge 11b and the sharpening surface 11c, which is formed at the end of the blade surface 11s.

[0071] If the angle between the opening face 11c of the first blade tip 11t and the back face 11b is set to a value of 60° or less, then when performing a cutting operation that changes from the opening posture to the final cutting posture (A), the displacement relative to the paper type P caused by the first blade tip 11t (the displacement in the thickness direction of the portion of the first blade tip 11t near the top end ct of the cutting line c) can be made gradual.

[0072] Furthermore, in this embodiment, the angle between the cutting surface 11c and the back surface 11b is set to approximately 47.5°.

[0073] The first cutting edge e1 is set to a length of at least 20 mm. The total length of the first cutting edge e1 is preferably set in the range of 60 mm to 70 mm, with an upper limit of 90 mm. More specifically, in this embodiment, the total length of the first cutting edge e1 is set to 65 mm.

[0074] The first tip 11t, which is the top part of the first blade 11, includes the topmost point m of the first cutting line e1.

[0075] A rectangular hole Q is formed between the front portion of the first cutting edge 11 with the first cutting edge line e1 and the rear portion of the first cutting edge 11, including the base end portion 11k embedded at the front end portion of the first shank portion 12. A bearing member g made of synthetic resin with a circular shaft insertion hole gh is installed in the rectangular hole Q.

[0076] <First Handle 12>

[0077] The first handle 12 is made of synthetic resin. The base end 11k of the first blade 11 is installed at the front end of the first handle 12. The first handle 12 is provided with a finger hole 12a for the user's finger to be inserted.

[0078] In this embodiment, the finger hole portion 12a of the first handle portion 12 is formed to allow the user's thumb to be inserted, and is smaller than the finger hole portion 22a of the second handle portion 22.

[0079] A first positioning portion 12b is provided at the middle of the end face of the first handle portion 12 facing the second handle portion 22 along its length. The first positioning portion 12b is shaped to protrude further toward the second handle portion 22 than the other end faces. The first positioning portion 12b can mate with the second positioning portion 22b provided on the second handle portion 22.

[0080] <<Second Cut 2>>

[0081] The second scissor 2 has a second metal blade 21 and a second handle 22 provided at the base end 21k of the second blade 21 and for the user's fingers to engage.

[0082] <Second Blade 21>

[0083] The second blade 21 is positioned above the paper type P when cutting the paper type P. The second blade 21 uses a stainless steel plate, which is a metal plate, as its base material. The second blade 21 is manufactured by stamping.

[0084] Furthermore, in the second blade 21, at least the second blade tip 21t constituting the top of the second blade 21 is ground until a predetermined thickness dimension w2 is obtained.

[0085] The second blade 21 has a second cutting line e2 formed between its flat back edge 21b, which can slide with the first blade 11, and its blade surface 21s, which is the side facing opposite to the first blade 11.

[0086] More specifically, the second cutting line e2 of the second blade 21 is formed between the back edge 21b and the cutting surface 21c, wherein the cutting surface 21c is formed at the end of the blade surface 21s.

[0087] If the angle between the opening face 21c of the second blade tip 21t and the back face 21b is set to a value of 60° or less, then when performing a cutting operation that changes from the opening posture to the final cutting posture (A), the displacement relative to the paper type P caused by the second blade tip 21t (the displacement of the second blade tip 21t in the thickness direction relative to the portion near the top end ct of the cutting line c) can be made gradual.

[0088] Furthermore, in this embodiment, the angle between the cutting surface 21c and the back surface 21b is set to approximately 47.5°.

[0089] The second cutting edge e2 is set to a length of at least 20 mm. The total length of the second cutting edge e2 is preferably set in the range of 60 mm to 70 mm, with an upper limit of 90 mm. More specifically, in this embodiment, the total length of the second cutting edge e2 is set to 65 mm.

[0090] The second tip 21t, which is the top part of the second blade 21, includes the topmost point n of the second cutting line e2.

[0091] Between the front part of the second blade 21 with the second cutting edge e2 and the rear part of the second blade 21 including the base end 21k embedded at the front end of the second shank 22, a shaft insertion hole 21h for the support shaft 3 to be inserted is provided.

[0092] In addition, the top end 3t of the support shaft 3 of the bearing member g installed at the rectangular hole Q of the first blade 11 and the shaft insertion hole 21h of the second blade 21 is riveted and deformed on the outer surface of the second blade 21 in order to connect the first blade 11 and the second blade 21 in a way that allows them to rotate relative to each other.

[0093] <Second handle 22>

[0094] The second handle 22 is made of synthetic resin. The base end 21k of the second blade 21 is installed at the front end of the second handle 22. The second handle 22 is provided with a finger hole 22a for the user's finger to be inserted.

[0095] In this embodiment, the finger hole portion 22a of the second handle portion 22 is formed to allow the user's fingers other than the thumb (such as the index finger, middle finger, ring finger, etc.) to be inserted, and is larger than the finger hole portion 12a of the first handle portion 12.

[0096] A second positioning portion 22b is provided at the middle of the end face of the second handle portion 22 facing the first handle portion 12 in the longitudinal direction. The second positioning portion 22b is shaped to protrude further toward the first handle portion 12 than the other end faces. The second positioning portion 22b can mate with the first positioning portion 12b provided on the first handle portion 12.

[0097] <Regarding the most overlapping position of the first cutting edge 11 and the second cutting edge 21 (J)>

[0098] The most overlapping position (J) of the first blade 11 and the second blade 21, which are connected by the support shaft 3 in a way that allows them to rotate relative to each other, in the direction of blade movement r is determined by the docking of the first positioning part 12b of the first handle 12 and the second positioning part 22b of the second handle 22.

[0099] That is, when the scissors S adopt the final cutting posture (A), the first blade 11 and the second blade 21 adopt the most overlapping position (J) in the blade movement direction r.

[0100] <<Support Shaft 3>>

[0101] The support shaft 3 connects the first shear body 1 and the second shear body 2 in a manner that allows them to rotate relative to each other.

[0102] The support shaft 3 is positioned forward of the first handle 12 constituting the first shear body 1 and the second handle 22 constituting the second shear body 2.

[0103] <Regarding the wall thickness dimensions w1 and w2 of the first cutting edge 11t and the second cutting edge 21t>

[0104] In the scissors S of this embodiment, particularly as Figure 11 As shown, at the most overlapping position (J) of the first cutting edge 11t and the second cutting edge 21t in the cutting direction r, the wall thickness w1 of the top part of the first cutting edge 11t is set to 0.2mm to 0.7mm, which corresponds to the first imaginary straight line k1 that is orthogonal to the cutting direction r from the top point n of the second cutting line e2.

[0105] In addition, in the scissors S of this embodiment, at the most overlapping position (J), the wall thickness w2 of the top part of the second blade tip 21t, which is located at the position corresponding to the second imaginary straight line k2 that is orthogonal to the blade movement direction r from the top point m of the first blade line e1, is set to 0.2 mm to 0.7 mm.

[0106] Here, if the wall thickness dimensions w1 and w2 of the corresponding parts of the first blade tip 11t and the second blade tip 21t are set to values ​​less than 0.2mm, it is easy to achieve the desired goal of not forming unexpected cracks, deformations or other damage D near the top of the cutting line c in the paper type P. However, on the other hand, it can easily cause problems such as blade curling (blade chipping).

[0107] In other words, if the wall thickness dimensions w1 and w2 of the corresponding parts of the first blade tip 11t and the second blade tip 21t are set to values ​​of 0.2 mm or more, the risk of blade rolling can be appropriately suppressed while achieving the initial purpose.

[0108] Furthermore, if the wall thickness dimensions w1 and w2 of the corresponding parts of the first blade tip 11t and the second blade tip 21t are set to values ​​greater than 0.7mm, the first blade tip 11t and the second blade tip 21t will act in a way that further expands the top part ct of the cutting line c laterally, which can easily cause unexpected cracks, deformations and other damages D near the top part ct of the cutting line c in the paper type P.

[0109] In other words, if the wall thickness dimensions w1 and w2 of the corresponding parts of the first cutting tip 11t and the second cutting tip 21t are set to values ​​of 0.7mm or less, it is not easy to form unexpected cracks, deformations or other damage D near the top of the cutting line c in the paper type P.

[0110] In this embodiment, the wall thickness dimensions w1 and w2 of the corresponding portions of the first cutting tip 11t and the second cutting tip 21t are set to 0.5 mm or less.

[0111] <Regarding the overlap dimension wp of the cutting action direction r of the first cutting tip 11t and the second cutting tip 21t>

[0112] In the scissors S of this embodiment, at the most overlapping position (J), the overlap dimension wp of the blade movement direction r at the top tip of the first blade tip 11t and the second blade tip 21t is set to a value greater than 0 and less than 1.0 mm.

[0113] Here, if the overlap dimension wp of the blade action direction r at the top tip of the first blade tip 11t and the second blade tip 21t is set to a value smaller than 0, not only will it be impossible to cut paper type P through the top tip of the first blade tip 11t and the top tip of the second blade tip 21t even in the final cutting posture (A), but it will also cause a safety problem because the first blade line e1 and the second blade line e2 included in the first blade tip 11t and the second blade tip 21t are always exposed.

[0114] Furthermore, if the overlap dimension wp of the cutting action direction r at the very top of the first cutting tip 11t and the second cutting tip 21t is set to a value greater than 1.0 mm, then when the first cutting tip 11t and the second cutting tip 21t form a cutting line c on the paper type P, the first cutting tip 11t and the second cutting tip 21t push the paper type P in opposite directions. Therefore, stress is easily concentrated near the top of the cutting line c ct in the paper type P, which can easily lead to damage D such as cracking and deformation.

[0115] In this embodiment, at the most overlapping position (J), the overlap dimension wp of the cutting action direction r at the topmost part of the first cutting tip 11t and the second cutting tip 21t is set to 0.5mm.

[0116] <The structure for suppressing the upward movement of paper type P during cutting by the first blade 11>

[0117] In this embodiment, the scissors S have an upward-pushing suppression structure on the first blade 11 of the first scissor body 1 that suppresses the upward pushing of a portion p1 of the paper type P when cutting it. Furthermore, the portion p1 of the paper type P that is pushed upward by the first blade 11 refers to the portion laterally adjacent to the first blade 11.

[0118] That is, a downwardly recessed portion 11w is formed in the first cutting edge 11 at a position forward of the support shaft 3. This recess 11w is configured to include a curved or bent first cutting line e1. Furthermore, the first cutting line e1 (hereinafter referred to as "the first cutting line front portion e1f") located in the first cutting edge 11 at a position forward of the recess 11w extends in a generally straight line between the recess 11w and the apex point m of the first cutting line e1, and is inclined at an angle Θ greater than 0° and less than 5° relative to the imaginary straight line wi connecting the axis point js of the support shaft 3 and the apex point m of the first cutting line e1.

[0119] If the tilt angle Θ is less than 0°, it will be difficult to form a cutting line c on paper type P. Furthermore, if the tilt angle Θ is set to an angle greater than 5°, then... Figure 19 As illustrated, if the first blade 11x or the second blade 21x pushes a portion p1 of the paper type P upward or downward to an excessive degree, the load is easily concentrated at the top ct of the cut line c in the paper type P, which can easily cause damage D such as cracking or deformation.

[0120] Here, when the inclination angle Θ of the first cutting line e1f relative to the imaginary straight line wi is set in the range of 2° to 3°, it is preferable to achieve a good balance between the condition that the cutting line c can be reasonably formed on the paper type P and the condition that damage such as cracking or deformation is not easily formed near the top ct of the cutting line c.

[0121] Furthermore, in this embodiment, the inclination angle Θ of the first cutting edge front portion e1f relative to the imaginary straight line wi is set to 3°.

[0122] In this embodiment, the first blade 11 is positioned such that the position of the first blade line e1, which is located in front of the recess 11w, is closer to the imaginary straight line wi than the inner edge of the first blade 11, which is located in a position behind the recess 11w.

[0123] As described above, the scissors S of this embodiment includes: a first scissor body 1, which is configured to include a first blade 11 having a first blade tip 11t at its top end; a second scissor body 2, which is configured to include a second blade 21 having a second blade tip 21t at its top end; and a support shaft 3, which supports the first scissor body 1 and the second scissor body 2 to be rotatable relative to each other so that the first cutting line e1 formed on the first blade 11 and the second cutting line e2 formed on the second blade 21 can slide to cut paper-like material P.

[0124] Furthermore, in the scissors S, at the most overlapping position (J) where the first blade tip 11t and the second blade tip 21t overlap each other in the blade movement direction r, the overlap dimension wp of the topmost parts of the first and second blade tips 11t and 21t is set to a value greater than 0 and less than 1.0 mm.

[0125] Therefore, in this embodiment, it is possible to at least suppress, as far as possible, undesirable situations such as unexpected cracks, deformations, or other damage D that are easily formed near the tip ct of the cutting line c when cutting paper-type P.

[0126] In other words, the overlap dimension wp of the topmost points of the first blade tip 11t and the second blade tip 21t is set to a value greater than 0 and less than 1.0 mm. Therefore, when the cutting line c is formed on the paper type P by the first blade tip 11t and the second blade tip 21t, the first blade tip 11t and the second blade tip 21t will not excessively push the paper type P in opposite directions.

[0127] Therefore, as Figure 16 As shown, paper type P is less likely to develop damage such as cracks or deformation near the top of the cutting line c formed by the cooperation of the first blade 11 and the second blade 21, and can suppress the situation where the function or appearance of paper type P is damaged due to such damage as cracks or deformation as much as possible.

[0128] The first shear body 1 has a first handle 12 for the user's fingers to engage at the base end 11k of the first blade 11, and the second shear body 2 has a second handle 22 for the user's fingers to engage at the base end 21k of the second blade 21. The support shaft 3 is located in front of the first handle 12 and the second handle 22. The most overlapping position (J) is determined by the docking of the first handle 12 and the second handle 22.

[0129] Therefore, the most overlapping position (J) of the first cutting tip 11t and the second cutting tip 21t in the cutting direction r is appropriately set by the docking of the first handle 12 and the second handle 22.

[0130] The first cutting edge e1 and the second cutting edge e2 are set to a size of at least 20mm.

[0131] Therefore, the scissors S are designed to be the size suitable for everyday use by users.

[0132] In the scissors S, at the most overlapping position (J), the wall thickness w1 of the first blade tip 11t, which corresponds to the first imaginary line k1 orthogonal to the blade movement direction r from the top point n of the second blade line e2, is set to 0.2mm to 0.7mm, and the wall thickness w2 of the second blade tip 21t, which corresponds to the second imaginary line k2 orthogonal to the blade movement direction r from the top point m of the first blade line e1, is set to 0.2mm to 0.7mm.

[0133] Therefore, the wall thickness dimensions w1 and w2 of the topmost parts of the first blade tip 11t and the second blade tip 21t are set to values ​​that will not cause damage D such as cracking or deformation to the cut paper type P. Thus, this configuration complements the setting of the overlap dimension wp of the blade action direction of the first blade tip 11t and the second blade tip 21t, and is a preferred configuration that is less likely to cause damage D such as cracking or deformation near the top of the cutting line c in the paper type P.

[0134] Furthermore, the present invention is not limited to the embodiments described in detail above.

[0135] In the above embodiments, the case where the first blade is set to be operated by the user's thumb (the so-called moving blade side) and the second blade is set to be operated by the user's fingers other than the thumb (the so-called stationary blade side) has been described, but they can also be reversed.

[0136] In other words, scissors can also be scissors in which the second blade is set as the side operated by the user's thumb (the so-called moving blade side) and the first blade is set as the side operated by the user's fingers other than the thumb (the so-called stationary blade side).

[0137] The paper cut by scissors is not limited to paper; as long as it is made of sheet material, it can be any kind of item.

[0138] The first and second handles can, of course, be constructed without being separate from the first and second blades.

[0139] Furthermore, the specific configuration of each part is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

Claims

1. A pair of scissors comprising: a first scissor body, the first scissor body being configured to include a first blade having a first cutting tip at its apex; a second scissor body, the second scissor body being configured to include a second blade having a second cutting tip at its apex; and a support shaft, the support shaft supporting the first scissor body and the second scissor body to be rotatable relative to each other so as to allow sliding of a first cutting line formed on the first blade and a second cutting line formed on the second blade to cut paper. At the point where the first and second cutting edges overlap most in the direction of the cutting action, the overlap dimension of the topmost points of the first and second cutting edges is set to a value greater than 0 and less than 1.0 mm.

2. The scissors according to claim 1, The first shear body has a first handle at the base end of the first blade for the user's fingers to engage. The second shear body has a second handle at the base end of the second blade for the user's fingers to engage. The support shaft is positioned forward of the first and second handle portions. The most overlapping position is defined by the docking of the first handle and the second handle.

3. The scissors according to claim 1, The first and second cutting edges are set to a size of at least 20 mm.

4. The scissors according to claim 1, At the most overlapping position, the wall thickness of the first blade tip corresponding to the first imaginary line orthogonal to the blade movement direction from the top of the second blade line is set to 0.2mm to 0.7mm, and the wall thickness of the second blade tip corresponding to the second imaginary line orthogonal to the blade movement direction from the top of the first blade line is set to 0.2mm to 0.7mm.

Images