Fitting scissors and method for manufacturing scissors

Abstract

The present invention provides fitting scissors for determining the weight balance desired by the user, and a method for manufacturing scissors based on the weight balance determined by the fitting scissors. [Solution] The fitting scissors 1, which consists of a pair of scissor blades 11a, 11b and handles 12a, 12b connected to the blades, assembled so as to be rotatable around a pivot shaft 13, has multiple male screw portions 15 provided on the handle portion, as well as multiple nut portions that are screwed into the male screw portions. In the scissor base of the fitting scissors, the portion corresponding to the part where the male screw portions are provided has a thickened portion. By cutting the thickened portion so that the mass of the nut portions screwed into the male screw portions remains, scissors with the same weight balance as the fitting scissors 1 can be manufactured.

Description

Technical Field

[0001] The present invention relates to a fitting shear used to manufacture a shear with a desired weight balance by a user, and a method for manufacturing a shear using the fitting shear.

Background Art

[0002] When a beautician or a barber cuts hair, the shear is moved by utilizing the gravity acting on the shear. Depending on the hairstyle to be finished, the position where the hair is cut in a pair of blade portions that are closed is different, and the angle of the blade portion with respect to the hair is different. Accordingly, the weight balance required for the shear being used is different. Therefore, generally, beauticians and barbers have a plurality of shears with different weight balances and use them appropriately according to the hairstyle and the like. Sometimes, beauticians and barbers recognize shears with different weight balances as shears with different feelings of use.

[0003] Furthermore, since the size and strength of fingers are different among users, the weight balance of a shear suitable for use is different for each person. Therefore, there has been a problem that it is very difficult to find a shear having a weight balance suitable for the hairstyle to be finished and suitable for the size and strength of the fingers of that person from existing shears. For a business operator who manufactures and sells shears, it is not practical to prepare in advance a variety of shears having different weight balances required according to the hairstyle and the size / strength of the fingers of the user.

[0004] Therefore, the inventor of the present invention conceived of preparing a fitting shear for grasping the weight balance desired by the user and manufacturing a shear based on the weight balance grasped by the fitting shear.

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, the present invention aims to provide fitting scissors for determining the weight balance desired by the user, and a method for manufacturing scissors based on the weight balance determined by the fitting scissors. [Means for solving the problem]

[0006] To solve the above problems, the fitting scissors according to the present invention are: "A pair of scissor blades, each having a blade and a handle connected to the blade, are assembled so as to be rotatable around a pivot axis, Multiple male screw portions are provided in the aforementioned handle portion, It comprises a male screw portion and a plurality of nut portions that are screwed into it.

[0007] The fitting scissors with this configuration allow for changes in weight balance by screwing nuts onto at least some of the multiple male screw sections. By changing the number of nuts screwed onto each male screw section, or by using nuts with different masses, the weight balance can be adjusted in various ways. Therefore, the fitting scissors with this configuration allow the user to determine the desired weight balance for the scissors.

[0008] Next, the method for manufacturing scissors according to the present invention is as follows: "A method for manufacturing scissors, which involves processing the original scissor shape based on the fitting scissors described above, The aforementioned scissor prototype has a scissor base having substantially the same weight balance as the fitting scissors in a state where the nut portion is not screwed onto any of the male screw portions, The scissor base comprises a portion of the scissor base that corresponds to the portion of the fitting scissor where a plurality of male screw portions are provided, and a thickened portion formed in that portion, The thickened portion can be cut based on the weight balance of the fitting scissors in a state where the nut portion is screwed onto at least a portion of the multiple male screw portions.

[0009] This is a method for manufacturing scissors from a scissor prototype that have the same weight balance as those determined by fitting scissors. The scissor prototype comprises a scissor base and a thickened section, and the scissor base has approximately the same weight balance as fitting scissors in a state where the nuts are not screwed onto any of the male screw sections. In the scissor prototype, the thickened section is formed on the scissor base in the part corresponding to the part where the male screw section is provided in the fitting scissors.

[0010] Therefore, in fitting scissors whose weight balance is adjusted by the user, by cutting the wall thickness of the part of the scissor prototype that corresponds to the male screw part, the mass of the nut part that is screwed onto at least some of the multiple male screw parts remains in that wall thickness, it is possible to manufacture scissors with the same weight balance as fitting scissors from the scissor prototype. Consequently, various types of scissors with different weight balances can be manufactured from a single type of scissor prototype, or from far fewer types of scissor prototypes than the various types of scissors that make up the final product.

[0011] While it is possible to manufacture completely custom-made scissors from scratch based on fitting scissors whose weight balance has been adjusted by the user, this would be time-consuming and costly. In contrast, the present invention involves manufacturing a pre-made scissor prototype with the basic components of scissors, and then manufacturing the scissors by cutting this prototype. This allows for the production of specially made scissors tailored to the user's requirements while keeping time and costs down. Furthermore, the amount of material to be removed from the thicker parts of the scissor prototype is determined by the weight of the nut that is screwed onto the corresponding male screw part on the fitting scissors, making the cutting process relatively easy.

[0012] The method for manufacturing scissors according to the present invention, in addition to the above configuration, "Each fitting scissors and the original scissors form are equipped with a detachable hit point and a plurality of hit point mounting parts to which the hit point is attached." The position of the hit point mounting portion in the fitting scissors and the position of the hit point mounting portion in the original scissors form can be considered to correspond.

[0013] In this configuration, the weight balance of the fitting scissors can be adjusted, including the selection of the hit point mounting section to which the hit point is attached. Thus, fitting scissors with the adjusted weight balance and scissors having the same weight balance, including the selection of the hit point mounting section to which the hit point is attached, can be manufactured from the original scissor shape. [Effects of the Invention]

[0014] As described above, the present invention provides fitting scissors for determining the weight balance desired by the user, and a method for manufacturing scissors based on the weight balance determined by the fitting scissors. [Brief explanation of the drawing]

[0015] [Figure 1] This is a perspective view of fitting scissors, which is one embodiment of the present invention. [Figure 2] This is a front view showing the scissor base in a scissor prototype, which is one embodiment of the present invention, with solid lines indicating the scissor base. [Figure 3] Figure 2 is a front view showing the original shape of the scissors. [Figure 4] This is a front view of the main part of a scissor prototype having multiple hit point mounting sections. [Modes for carrying out the invention]

[0016] The following describes a specific embodiment of the present invention, the fitting scissors 1, and a method for manufacturing scissors using the fitting scissors 1, with reference to the drawings. First, the configuration of the fitting scissors 1 will be described using Figure 1.

[0017] The fitting pliers 1 have the basic configuration generally provided for pliers. That is, a pair of plier pieces each having blade portions 11a, 11b and handle portions 12a, 12b connected to the blade portions 11a, 11b are assembled to be rotatable around a support shaft 13, and the handle portions 12a, 12b have handle parts 121a, 121b and finger rings 122a, 122b, which is the basic configuration. Here, among the pair of plier pieces, the configuration of the moving blade is referred to as the first blade portion 11a, the first handle portion 12a, the first handle part 121a, and the first finger ring 122a, and the configuration of the stationary blade is referred to as the second blade portion 11b, the second handle portion 12b, the second handle part 121b, and the second finger ring 122b.

[0018] Further, the fitting pliers 1 include a hit point 17 protruding from the side surface of the first finger ring 122a toward the second finger ring 122b and a finger hook 19 provided at the tip of the second finger ring 122b. In this document, with respect to the fitting pliers 1, the side of the user who inserts fingers into the first finger ring 122a and the second finger ring 122b and holds the fitting pliers 1 is referred to as "front", and the opposite side is referred to as "rear".

[0019] And the fitting pliers 1 include male screw portions 15 provided in plurality in each of the first handle portion 12a and the second handle portion 12b, and a plurality of nut portions (not shown) screwed with the male screw portions 15. The plurality of male screw portions 15 are provided at positions that do not become an obstacle to the opening and closing of the pair of plier pieces and do not contact the fingers of the user holding the fitting pliers 1.

[0020] Specifically, the fitting pliers 1 include a male screw portion 15 extending rearward from a portion that is the boundary between the first finger ring 122a and the first handle part 121a in the first handle portion 12a, a male screw portion 15 extending from the base of the hit point 17 in the first handle portion 12a toward the side opposite to the first blade portion 11a, a male screw portion 15 extending forward from a portion that is the boundary between the second finger ring 122b and the second handle part 121b in the second handle portion 12b, and a male screw portion 15 extending from the base of the finger hook 19 in the second handle portion 12b toward the side opposite to the second blade portion 11b.

[0021] In manufacturing scissors, when grasping the weight balance desired by the user, the fitting scissors 1 with the above structure is used. Specifically, the user is asked to insert fingers into the first finger ring 122a and the second finger ring 122b to hold the fitting scissors 1, and a nut part is fastened to at least a part of the plurality of male screw parts 15 so as to achieve the weight balance desired by the user. By changing the number of nut parts fastened to one male screw part 15 or using nut parts with different masses per one, the weight balance of the fitting scissors 1 can be adjusted. Therefore, it is desirable to prepare a plurality of types of nut parts with different masses per one, respectively, in plural numbers.

[0022] Thus, the operation of adjusting the weight balance of the fitting scissors 1 by fastening a nut part to at least a part of the plurality of male screw parts 15 is preferably performed, for example, while cutting the hair of a cut mannequin (cut wig). By doing so, the weight balance of the fitting scissors 1 can be adjusted while considering the size and strength of the user's own fingers and the hairstyle to be finished.

[0023] As described above, when the weight balance of the scissors desired by the user can be grasped by the fitting scissors 1, based on this, the scissors are manufactured. The manufacturing of this scissors is performed by cutting a part of the scissors prototype 2.

[0024] As shown in Figures 2 and 3, the scissor base 2 comprises a scissor base 20 and a thickened portion 25. The scissor base 20 has the basic configuration that scissors generally have. Specifically, the scissor base 20 is assembled so as to be rotatable around a pivot shaft 23, with a scissor piece having a first blade portion 21a and a first handle portion 22a, and a scissor piece having a second blade portion 21b and a second handle portion 22b. The first handle portion 22a has a first handle portion 221a and a first ring 222a, and the second handle portion 22b has a second handle portion 221b and a second ring 222b. The scissor base 20 also has a hit point 27 protruding from the side of the first ring 222a toward the second ring 222b, and a finger rest 29 provided at the tip of the second ring 222b. In Figure 2, the part shown by the solid line represents the scissor base 20.

[0025] The scissor base 20 with this configuration is formed to have almost the same weight balance as the fitting scissors 1 in which the nut portion is not screwed onto any of the male screw portions 15.

[0026] The scissor prototype 2 has multiple thickened sections 25 formed on the scissor base 20. The thickened sections 25 are parts that protrude from the surrounding parts due to their thickness. The positions where the multiple thickened sections 25 are formed on the scissor base 20 correspond to the positions where multiple male screw sections 15 are provided on the fitting scissors 1.

[0027] Specifically, the scissor prototype 2 includes a thickened portion 25 formed at the boundary between the first ring 222a and the first handle portion 221a in the first handle portion 22a, a thickened portion 25 formed at the base of the hit point 27 in the first handle portion 22a, a thickened portion 25 formed at the boundary between the second ring 222b and the second handle portion 221b in the second handle portion 22b, and a thickened portion 25 formed at the base of the finger rest 29 in the second handle portion 22b. In the fitting scissors 1, each thickened portion 25 has a mass greater than or equal to the mass of the largest nut portion that can be screwed onto each male screw portion 15, and the mass of each thickened portion 25 is known.

[0028] The cutting process of the scissor prototype 2 is performed by cutting the wall thickness 25 of the fitting scissors 1, which has its weight balance adjusted, so that the amount of mass remaining is equal to the mass of the nut fastened to the male screw portion 15 at the position corresponding to the wall thickness 25. For example, in the fitting scissors 1, the wall thickness 25 at the position corresponding to the male screw portion 15 to which a smaller nut is fastened is cut more than the wall thickness 25 at the position corresponding to the male screw portion 15 to which a larger nut is fastened, thereby reducing the mass of the wall thickness 25. In the fitting scissors 1, if there is a male screw portion 15 to which no nut is fastened, the entire wall thickness 25 at the position corresponding to that male screw portion 15 is removed by cutting.

[0029] By machining the scissor prototype 2 in this way, it is possible to manufacture scissors with the same weight balance as the fitting scissors 1, which have had their weight balance adjusted. Therefore, a wide variety of scissors with different weight balance requirements for each user can be manufactured from a single scissor prototype 2.

[0030] Furthermore, the scissor prototype 2 does not have to be just one type. For example, multiple types of scissors with different weight balances, such as scissors with a heavier moving blade and scissors with a heavier stationary blade, can be divided into several types, and a scissor prototype 2 can be prepared for each type. In this way, multiple types of scissors with different weight balances can be manufactured from a much smaller number of scissor prototypes 2, and the amount of material removed from the scissor prototype 2 by cutting during the manufacturing of the scissors can also be reduced.

[0031] Furthermore, the scissor prototype can be configured as a scissor prototype 2b, as shown in Figure 4, comprising a detachable hit point 27 and a plurality of hit point mounting parts 28 to which the hit point 27 is attached. Here, the case where there are two hit point mounting parts 28 is shown as an example. The hit point 27 has a shaft portion 27b with a male thread formed thereon, and the hit point mounting part 28 is a female screw hole that screws into the male thread of the shaft portion 27b.

[0032] Thus, when the scissor prototype 2b has multiple hit point mounting sections 28 and the hit points 27 are detachable, although not shown in the illustration, the fitting scissors 1 also has the same number of hit point mounting sections in the same positions and the hit points are detachable. The weight balance of the scissors also changes by changing the hit point mounting section 28 to which the hit points 27 are attached. Therefore, by adjusting the weight balance of the fitting scissors 1, including the selection of the hit point mounting section to which the hit points are attached, it is possible to manufacture scissors with the same weight balance as the fitting scissors 1 from the scissor prototype 2b which has hit point mounting sections 28 and detachable hit points 27.

[0033] Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various improvements and design changes are possible without departing from the spirit of the present invention, as shown below.

[0034] For example, the above example illustrates a fitting scissors 1 in which two male screw portions 15 are provided on each of the first handle portion 12a and the second handle portion 12b, but the number and position of the male screw portions 15 are not limited to those exemplified. As mentioned above, other male screw portions can be provided in positions that do not interfere with the opening and closing operation of the pair of scissor blades and do not come into contact with the fingers of the user holding the fitting scissors 1. One such position is the side of the first ring 122a opposite to the second ring 122b side. In this case, the scissor base 2,2b is also provided with a wall thickness portion 25 of the same mass as the male screw portion at the same position.

[0035] Furthermore, although the above diagram illustrates the case where the scissors manufactured from fitting scissors 1 and scissor prototype 2 are cutting scissors, the present invention can also be applied to thinning scissors in which one of the blades has comb teeth.

[0036] Furthermore, the present invention is not limited to hairdressing scissors, but can be applied to various types of scissors where a weight balance desired by the user is required. [Explanation of Symbols]

[0037] 1. Fitting scissors 2. Original shape of scissors 11a First blade part (blade part) 11b Second blade part (blade part) 12a First handle part (handle part) 12b Second handle part (handle part) 13 Spindle 15 Male threaded section 20 Scissors base 25 Thick part 27 Hit Points 28 Hit Point Mounting Section

Claims

1. A pair of scissor blades, each having a blade and a handle connected to the blade, are assembled to rotate around a pivot axis. Multiple male screw portions are provided in the aforementioned handle portion, It comprises a male screw portion and a plurality of nut portions that are screwed into it. A fitting scissors characterized by the following.

2. A method for manufacturing scissors, comprising processing a scissor prototype based on the fitting scissors described in claim 1, The aforementioned scissor prototype has a scissor base having substantially the same weight balance as the fitting scissors in a state where the nut portion is not screwed onto any of the male screw portions, The scissor base comprises a portion of the scissor base that corresponds to the portion of the fitting scissor where a plurality of male screw portions are provided, and a thickened portion formed in that portion, Based on the weight balance of the fitting scissors in a state where the nut portion is screwed onto at least a portion of the multiple male screw portions, the thick portion is cut. A method for manufacturing scissors characterized by the following.

3. The fitting scissors and the original scissors form each comprise a detachable hit point and a plurality of hit point mounting parts to which the hit point is attached. The position of the hit point mounting portion in the fitting scissors corresponds to the position of the hit point mounting portion in the original scissors shape. The method for manufacturing scissors according to claim 2.

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