scissors

Abstract

To provide a technique capable of reducing the burden of an opening / closing operation of scissors while suppressing reduction of cutting performance of the scissors.SOLUTION: The scissors comprise: a first member having a first blade on the tip side and a first finger hook on which a user hooks a finger; a second member having a second blade on the tip side and a second finger hook on the rear end side of which the user hooks a finger; a rotary shaft that penetrates the centers of the first and second members stacked on each other and rotatably fastens the first and second members; and an intermediate member disposed between the first and second members, having the tip supported on the rotary shaft and the rear end locked to the second member closer to the rear end side than the rotary shaft, rotated together with the second member with respect to the first member, and disposed so as to apply a force to the second member in a direction away from the first member.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The technology of the present disclosure relates to scissors. [Background technology]

[0002] One type of scissors is known as a barber's scissors, used for haircuts and other barbering tasks. In barber's scissors, the distance between the back surfaces of two blades, called the "stationary blade" and the "moving blade," is typically adjusted with high precision. Conventional barber's scissors have a "contact point" on the handle side of the pivot shaft where the two blades rub against each other to provide a counterforce against the force acting to widen the gap between the stationary blade and the moving blade during haircutting.

[0003] However, if the contact points come into contact with each other, the resistance caused by the contact can hinder the opening and closing of the scissors. In recent years, to address this issue, hairdressing scissors designed to prevent such contact points from occurring have been proposed, such as in Patent Document 1 listed below. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-46769 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if the contact points are not provided, the distance between the stationary blade and the moving blade may increase, and the rotational movement may become unstable. The present application aims to provide a technology that can smooth the rotational movement of scissors while suppressing a decline in the cutting performance of the scissors by using a method different from conventional methods. The problem that the present application aims to solve is not limited to barber scissors, but is a problem common to various other types of scissors. [Means for solving the problem]

[0006] The technology of the present disclosure can be realized in the following forms.

[0007] (1) One embodiment of the technology disclosed herein is provided as scissors. The scissors of this embodiment include a first member having a first blade portion at a tip end and a first finger rest at a rear end where a user places a finger, a second member having a second blade portion at a tip end and a second finger rest at a rear end where the user places a finger, a pivot shaft portion that penetrates a center of the first member and the second member that are arranged one over the other and pivotally fastens the first member and the second member, and an intermediate member that is arranged between the first member and the second member, has a tip end supported by the pivot shaft portion and a rear end that is engaged with the second member rearward of the pivot shaft portion, pivots together with the second member relative to the first member, and is arranged such that the rear end applies a force to the second member in a direction away from the first member. In this configuration of scissors, the force applied to the second member by the rear end of the intermediate member increases the distance between the first and second members rearward of the pivot shaft, and decreases the distance between the first and second blades. This prevents a decrease in the cutting performance of the scissors, smooths the rotation of the scissors, and makes it easier to open and close the scissors.

[0008] (2) In the scissors of the above form, the intermediate member may be composed of an elastic member that generates an elastic force by bending deformation of the area between the tip end and the rear end, and the elastic force may be used to urge the second member in a direction away from the first member through the rear end. With this type of scissors, the elastic force of the intermediate member made of an elastic material can easily generate a force that increases the distance between the first member and the second member at the rear end side of the pivot shaft and decreases the distance between the first blade portion and the second blade portion.

[0009] (3) In the scissors of the above form, the second member may have a protrusion that protrudes from the second member below the rear end of the intermediate member and is fixed to the rear end, and the intermediate member may apply a force to the second member in a direction away from the first member via the rear end via the protrusion. With this type of scissors, the protruding portions of the intermediate member and the second member increase the distance between the first member and the second member at the rear end side of the pivot shaft, and easily generate a force that acts in a direction that decreases the distance between the first blade portion and the second blade portion.

[0010] (4) In the scissors of the above form, the protrusion is fixed to the second member by screwing into a screw hole provided in the second member, and the height at which the protrusion protrudes from the second member may be adjustable by the depth to which the protrusion is screwed into the screw hole. With this type of scissors, the force applied to the second member from the rear end of the intermediate member can be adjusted by adjusting the height of the protruding portion, which makes it easy to adjust the cutting performance and ease of opening and closing the scissors.

[0011] (5) In the scissors of the above configuration, the rear end of the intermediate member may be positioned in a position closer to the side end of the second member in the width direction than the side end having the cutting line of the second blade portion. With this type of scissors, the force applied to the second member from the rear end of the intermediate member acts with the pivot shaft as a fulcrum in a direction that brings the cutting lines of the first and second blade portions closer together, thereby improving the cutting performance of the scissors.

[0012] (6) The scissors of the above embodiment may further include a pair of bearings attached to the pivot shaft portion between the first member and the second member, and supporting the tip end of the intermediate member by means of rolling elements. This type of scissors allows the intermediate member to rotate more smoothly while improving the support of the tip of the intermediate member relative to the pivot shaft, thereby further preventing a decrease in the cutting performance of the scissors and making it easier to open and close the scissors.

[0013] (7) In the scissors of the above aspect, at least one of the first member and the second member may be provided with a recess for accommodating the intermediate member. According to the scissors of this configuration, the distance between the first member and the second member at the location where the intermediate member is disposed can be reduced, thereby preventing the scissors from becoming too large.

[0014] (8) In the scissors of the above form, the pivot shaft portion may have a threaded portion that screws into a threaded groove provided in a through hole of the second member through which the pivot shaft portion is inserted, and a holding member that rotatably holds the pivot shaft portion may be arranged in the through hole of the first member through which the pivot shaft portion is inserted. With this type of scissors, the distance between the first and second members can be adjusted by adjusting the depth to which the threaded portion of the pivot shaft threads into the screw hole in the second member, making it easy to adjust the cutting performance of the scissors and the ease of opening and closing the scissors.

[0015] The technology disclosed herein can be implemented in various types of scissors other than barber scissors, and can also be implemented in forms other than scissors, such as intermediate members used in scissors, the structure of scissors equipped with intermediate members, and various devices equipped with scissors. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is a schematic plan view showing the scissors in a closed state. [Figure 2] FIG. 2 is a schematic plan view showing the scissors in an open state. [Figure 3] Schematic cross-sectional view of a first cutting edge portion and a second cutting edge portion. [Figure 4] FIG. 2 is a schematic cross-sectional view showing the configuration of a rotation mechanism according to the first embodiment. [Figure 5]FIG. 4 is a schematic plan view showing an intermediate member disposed on a second member. [Figure 6] FIG. 4 is a schematic plan view showing an arrangement area of ​​an intermediate member in the first member. [Figure 7] FIG. 10 is a schematic cross-sectional view showing the configuration of a rotation mechanism according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] 1. First embodiment: 1 and 2 are schematic plan views of scissors 10 of the first embodiment as viewed along a rotation axis RX. Fig. 1 shows scissors 10 in a closed state, and Fig. 2 shows scissors 10 in an open state.

[0018] In this embodiment, scissors 10 are barber scissors used for cutting hair. In this specification, "barber scissors" refers to scissors used for hairdressing and is used synonymously with or as a concept that includes beauty scissors and hairdressing scissors. Scissors 10 include a first member 11, a second member 12, and a rotation mechanism 15 that connects first member 11 and second member 12 so that they can rotate relative to each other about a rotation axis RX.

[0019] The first member 11 and the second member 12 are formed of elongated metal members extending from the front end to the rear end. The first member 11 has a first cutting edge 11f on the front end side, and the second member 12 has a second cutting edge 12f on the front end side. One side edge of each of the first cutting edge 11f and the second cutting edge 12f forms a sharply sharpened cutting line BL.

[0020] The rear end side of the rotation axis RX of the first member 11 and the second member 12 constitutes the handle portion of the scissors 10. The first member 11 has a first finger rest 11r on which a user's finger can be placed, at the rear end side of the first blade portion 11f. The second member 12 has a second finger rest 12r on which a user's finger can be placed, at the rear end side of the second blade portion 12f.

[0021] The central portion between first blade portion 11f and first finger hook portion 11r of first member 11 and the central portion between second blade portion 12f and second finger hook portion 12r of second member 12 are arranged to overlap, and a rotation shaft portion 16 (described later) of rotation mechanism 15 passes through these central portions and rotatably fastens first member 11 and second member 12. Note that, in order to connect first member 11 and second member 12 in a state that allows smooth rotation, rotation mechanism 15 is configured to have a degree of play that allows first member 11 and second member 12 to swing very slightly inclined relative to each other about rotation shaft portion 16 as a fulcrum.

[0022] When the scissors 10 are closed, as shown in Fig. 1, the first blade portion 11f and the second blade portion 12f overlap in the direction along the rotation axis RX, and a hit point 17 provided on the second finger hook 12r comes into contact with the outer periphery of the first finger hook 11r, restricting the rotation of the first member 11 and the second member 12. When the scissors 10 are open, as shown in Fig. 2, the hit point 17 of the second finger hook 12r moves away from the first finger hook 11r, and the cutting lines BL of the first blade portion 11f and the second blade portion 12f face each other inward so as to be able to pinch the object to be cut.

[0023] In this embodiment, the first finger rest 11r of the first member 11 is configured to accommodate a finger other than the thumb, such as the ring finger, and the first cutting edge 11f constitutes a so-called static blade that serves as a reference for the position of the scissors when cutting hair. The second finger rest 12r of the second member 12 is configured to accommodate a thumb, and the second cutting edge 12f constitutes a so-called movable blade that rotates relative to the static blade when cutting hair.

[0024] 3 is a schematic cross-sectional view of the first blade portion 11f and the second blade portion 12f at the 3-3 cut shown in FIG. 1. The back surfaces of the first blade portion 11f and the second blade portion 12f, which face each other when the scissors 10 are closed, are slightly curved and concave. The concave surfaces formed on the back surfaces of the first blade portion 11f and the second blade portion 12f are also called "back combing." The first blade portion 11f and the second blade portion 12f are held by the rotation mechanism 15 so that only the tips of the blades are slightly in contact with each other, and the other rear end portions are slightly separated, forming a minute gap GP.

[0025] Fig. 4 is a schematic cross-sectional view of the rotation mechanism 15 in the 4-4 cut shown in Fig. 1. Arrow F shown in Fig. 4 indicates the direction toward the tip end of the scissors 10, and arrow R indicates the direction toward the rear end of the scissors 10.

[0026] The rotation mechanism 15 includes a rotation shaft portion 16 that forms the rotation axis RX of the first member 11 and the second member 12, a holding member 21 that holds the rotation shaft portion 16, a nut portion 23 that is fastened to the rotation shaft portion 16, and a fixing plate 25 that fixes the holding member 21.

[0027] The pivot shaft 16 is inserted through a through hole 18a of the first member 11 and a through hole 18b of the second member 12. The central axis of the pivot shaft 16 coincides with the pivot axis RX of the first member 11 and the second member 12. A threaded portion 16s is provided at the portion of the pivot shaft 16 that is inserted into the through hole 18b of the second member 12. A screw groove 27 into which the threaded portion 16s of the pivot shaft 16 screws is provided within the through hole 18b of the second member 12.

[0028] A portion of the threaded portion 16s of the rotating shaft 16 extends from the through-hole 18b of the second member 12 toward the surface of the second member 12. The nut portion 23 is disposed on the surface of the second member 12 and is screwed onto the extending portion of the threaded portion 16s. Fastening the nut portion 23 improves the fixation of the rotating shaft 16 to the second member 12.

[0029] A head 16h that spreads out like a disk in a radial direction perpendicular to the central axis is provided at the end of the rotating shaft 16 on the first member 11 side, and the portion below the head 16h is inserted into a through-hole 18a of the first member 11. A holding member 21 that holds the rotating shaft 16 rotatably is disposed in the through-hole 18a of the first member 11.

[0030] The holding member 21 is formed of an annular bearing, and the rotating shaft 16 is inserted into an opening in the center thereof. The outer peripheral edge of the head 16h of the rotating shaft 16 is engaged with the inner peripheral edge of the holding member 21. Although detailed illustrations and explanations are omitted, the bearing that constitutes the holding member 21 has an inner ring and an outer ring that are integrated and can rotate relatively to each other via rolling elements. The inner ring of the holding member 21 is fitted onto the outer periphery of the rotating shaft 16, and the outer ring is engaged with the inner peripheral edge of the through hole 18a of the first member 11.

[0031] Fixing plate 25 is fixed to the surface of first member 11 with screws 26. Fixing plate 25 fixes holding member 21 to first member 11 by sandwiching the outer peripheral edge of the outer ring of holding member 21, which is engaged with the inner peripheral edge of through hole 18a of first member 11, between fixing plate 25 and first member 11. Fixing plate 25 prevents holding member 21 from falling off first member 11.

[0032] According to scissors 10 of this embodiment, the distance between first member 11 and second member 12 can be adjusted by adjusting the depth to which threaded portion 16s of pivot shaft 16 is threaded into through-hole 18b of second member 12. This allows the distance between first blade portion 11f and second blade portion 12f to be adjusted, and the cutting performance of scissors 10 can be adjusted. It also allows the resistance during opening and closing operations of scissors 10 to be adjusted. Furthermore, according to scissors 10 of this embodiment, pivot shaft 16 is held by holding member 21 in a state where it can rotate relative to first member 11. This allows pivot shaft 16 to rotate smoothly, making opening and closing operations of scissors 10 easier.

[0033] The intermediate member 30 of the rotation mechanism 15 will be described with reference to Fig. 4 and, where appropriate, Fig. 5 or Fig. 6. Fig. 5 is a schematic plan view showing the intermediate member 30 arranged on the back surface of the second member 12. Fig. 6 is a schematic plan view showing the arrangement area of ​​the intermediate member 30 on the back surface of the first member 11. Fig. 6 illustrates the arrangement area of ​​the intermediate member 30 when the scissors 10 are in the open state and when they are in the closed state.

[0034] See Fig. 4. The rotation mechanism 15 further includes an intermediate member 30, a pair of bearings 41 and 42, a locking member 43, and a plurality of annular members 44 and 45. The intermediate member 30 is made of a metal plate-like member. As will be described later, the intermediate member 30 of this embodiment is made of a leaf spring that deforms in its thickness direction to generate elastic force.

[0035] The intermediate member 30 is disposed in the gap between the first member 11 and the second member 12. A tip end 31 of the intermediate member 30 is rotatably connected to the rotating shaft 16. As shown in FIG. 5, an insertion hole 32 through which the rotating shaft 16 is inserted is formed in the tip end 31 of the intermediate member 30. As shown in FIG. 4, a small gap is formed between the inner circumferential surface of the insertion hole 32 and the outer circumferential surface of the rotating shaft 16.

[0036] The tip end 31 of the intermediate member 30 is supported at a predetermined position on the rotary shaft 16 via a pair of bearings 41 and 42, as will be described below.

[0037] Referring to Figure 4, the tip end 31 of the intermediate member 30 is sandwiched between a pair of bearings 41, 42. Each of the pair of bearings 41, 42 has an annular shape, and the rotating shaft 16 is inserted through a central opening. The first bearing 41 is disposed on the first member 11 side, and the second bearing 42 is disposed on the second member 12 side. The rolling elements of the first bearing 41 contact the surface of the tip end 31 of the intermediate member 30 facing the first member 11. The rolling elements of the second bearing 42 contact the surface of the tip end 31 of the intermediate member 30 facing the second member 12.

[0038] The locking member 43 is formed, for example, by an E-ring. The locking member 43 is fixed to a locally reduced diameter constricted portion 16c provided at a predetermined position between the threaded portion 16s and the head 16h of the rotation shaft portion 16. The multiple annular members 44, 45 are arranged to sandwich the pair of bearings 41, 42 in the direction of the rotation axis RX. The first annular member 44 is arranged between the first bearing 41 and the holding member 21 and is in contact with both the first bearing 41 and the holding member 21. The second annular member 45 is arranged between the second bearing 42 and the locking member 43.

[0039] The pair of bearings 41, 42 are locked to the holding member 21 via a first annular member 44, and are locked to a locking member 43 via a second annular member 45. In this specification, the term "locked" means that the bearings are in contact with an object and are restricted from moving in the direction of contact. Therefore, the "locked" state does not necessarily mean that the bearings are fitted into and fixed to the object.

[0040] The tip end portion 31 of the intermediate member 30 is supported by the pair of bearings 41, 42, and thereby supported by the rotation shaft portion 16. In this embodiment, the tip end portion 31 of the intermediate member 30 is supported by being sandwiched between the pair of bearings 41, 42, which improves the supportability of the tip end portion 31 of the intermediate member 30 relative to the rotation shaft portion 16 and also facilitates the rotation of the intermediate member 30 about the rotation axis RX as a fulcrum.

[0041] The position at which the tip end 31 of the intermediate member 30 is supported on the rotating shaft 16 is determined by the position of the locking member 43 and the thickness of the multiple annular members 44, 45. The distance between the tip end 31 of the intermediate member 30 and the second member 12 can be adjusted by changing the depth to which the threaded portion 16s of the rotating shaft 16 is screwed into the second member 12.

[0042] The rear end 35 of the intermediate member 30 is engaged with the second member 12 at a position rearward of the pivot shaft 16. A mooring portion 36 protruding in the thickness direction of the intermediate member 30 is provided at the rear end 35 of the intermediate member 30. A rear end hole 47, into which the mooring portion 36 is hooked and engaged, is provided on the back surface of the second member 12, rearward of the pivot shaft 16. As shown in FIG. 5, both side surfaces of the mooring portion 36 contact the inner peripheral surface of the rear end hole 47. As a result, when the scissors 10 are opened or closed, the intermediate member 30 rotates together with the second member 12 relative to the first member 11 around the pivot axis RX as a fulcrum, as shown in FIG. 6.

[0043] See FIG. 4 . As described below, the intermediate member 30 is disposed in a state in which the rear end portion 35 applies a force to the second member 12 in a direction away from the first member 11. When no external force is applied to the intermediate member 30, the portion between the front end portion 31 and the rear end portion 35 is curved in the thickness direction. As described above, the front end portion 31 of the intermediate member 30 is supported on the pivot shaft portion 16 at a predetermined position away from the second member 12. The rear end portion 35 of the intermediate member 30 is disposed in contact with the inner circumferential edge of the rear end hole 47. The intermediate member 30 is disposed in a state in which the rear end portion 35 is pressed against the second member 12, and the portion between the front end portion 31 and the rear end portion 35 is bent and deformed in a direction approaching flatness. As a result, the intermediate member 30 applies an elastic force to the second member 12 through the rear end portion 35, urging the second member 12 in a direction away from the first member 11.

[0044] The force applied by the rear end 35 of the intermediate member 30 to a position on the second member 12 rearward of the pivot shaft 16 acts in a direction tilting the second member 12 relative to the first member 11, with the pivot shaft 16 connecting the first member 11 and the second member 12 as a fulcrum. More specifically, the force acts in a direction increasing the distance between the first member 11 and the second member 12 rearward of the pivot shaft 16 and decreasing the distance between the first blade portion 11f and the second blade portion 12f. When the scissors 10 are in use, this force acts in a direction preventing the distance between the first blade portion 11f and the second blade portion 12f from widening depending on the cutting object, thereby preventing a decrease in the cutting performance of the scissors 10. The force also acts in a direction preventing contact between the first member 11 and the second member 12 rearward of the pivot shaft RX and preventing resistance that interferes with the opening and closing operations of the scissors 10. Therefore, the opening and closing operation of the scissors 10 can be made easier while suppressing a decrease in the cutting performance of the scissors 10.

[0045] As shown in FIG. 5, the rear end 3 of the intermediate member 30 5 is In the width direction of the second member 12, the intermediate member 30 is preferably positioned closer to the side edge of the second cutting portion 12f on the ridge side, opposite the side edge having the cutting line BL of the second cutting portion 12f. At this position, the force applied to the second member 12 from the rear end 35 of the intermediate member 30 acts with the pivot shaft 16 as a fulcrum in a direction that brings the cutting lines BL of the first cutting portion 11f and the second cutting portion 12f closer to each other. This further improves the cutting performance of the scissors 10.

[0046] Please refer to Figures 1 and 4. In the first member 11 of this embodiment, a ridge portion 48 that is thicker than other portions is formed on the side end of the first cutting portion 11f on the side opposite to the cutting line BL. In addition, a groove portion 49 is formed between the first cutting portion 11f of the first member 11 and the rotation shaft portion 16 along the width direction of the first member 11. The first member 11 has a groove portion 49The thickness is locally reduced at the groove 49, and the groove 49 constitutes a portion of the first member 11 where the rigidity is locally reduced. Therefore, when an external force is applied to the first blade portion 11f in the thickness direction, the first member 11 is likely to bend elastically at the groove 49. As a result, even if a large force is generated during use of the scissors 10 that widens the gap between the first blade portion 11f and the second blade portion 12f, the first member 11 will not bend at the groove 49. 49 Since the first member 11 and the second member 12 are elastically deformed at this position, the gap between the first member 11 and the second member 12 on the rear end side of the rotation shaft 16 is prevented from becoming too narrow. Therefore, the rotation of the scissors 10 is prevented from being hindered.

[0047] Referring to FIG. 4, the back surfaces of the first member 11 and the second member 12 are each provided with a recess 50 for accommodating the components that make up the rotation mechanism 15. The recess 50 on the back surface of the first member 11 includes a first recess 51 and a second recess 52. The first recess 51 is provided around the rotation shaft 16 and accommodates the front end 31 of the intermediate member 30. The second recess 52 is connected to the first recess 51 and accommodates the rear end 35 of the intermediate member 30. The first recess 51 is deeper than the second recess 52. As shown in FIG. 6, the second recess 52 is open in the rotation direction of the intermediate member 30 so as not to hinder the rotation of the intermediate member 30. The recess 50 on the back surface of the second member 12 is formed in an area facing the first recess 51 of the first member 11.

[0048] According to scissors 10 of this embodiment, a recess 50 for accommodating intermediate member 30 is formed in at least first member 11. This reduces the distance between first member 11 and second member 12 at the location where intermediate member 30 is disposed, preventing scissors 10 from becoming too large.

[0049] However, if a component for assisting the rotation of the scissors is added to the outside of the scissors body, the added component may interfere with tasks performed using the scissors. For example, in the case of barber scissors, hair may get caught in the gaps created by the added component and become tangled, hindering barbering. In contrast, with the scissors 10 of this embodiment, the intermediate component 30 is disposed between the first component 11 and the second component 12. This reduces the possibility that the intermediate component 30 will interfere with tasks performed using the scissors 10, such as barbering.

[0050] As described above, according to the scissors 10 of the first embodiment, the force applied to the second member 12 by the intermediate member 30 arranged between the first member 11 and the second member 12 can improve cutting performance and make the opening and closing operation easier.

[0051] 2. Second embodiment: 7 is a schematic cross-sectional view showing the configuration of a rotation mechanism 15A included in scissors 10A of the second embodiment. Scissors 10A of the second embodiment have substantially the same configuration as scissors 10 of the first embodiment, except that scissors 10A of the second embodiment have rotation mechanism 15A of the second embodiment instead of rotation mechanism 15 of the first embodiment. Rotation mechanism 15A of the second embodiment has substantially the same configuration as rotation mechanism 15 of the first embodiment, except for the points described below.

[0052] The pivoting mechanism 15A of the second embodiment includes an intermediate member 30A made of a flat plate-like member instead of the intermediate member 30 functioning as a leaf spring as described in the first embodiment. In the second embodiment, the intermediate member 30A has a rigidity that makes it difficult to bend. However, in other embodiments, the intermediate member 30A may be made of an elastic member having a configuration similar to that of the intermediate member 30 of the first embodiment. The pivoting mechanism 15A includes a protrusion 55 provided on the second member 12. The protrusion 55 is installed so as to protrude from the second member 12 below the rear end portion 35 of the intermediate member 30A. The rear end portion 35 of the intermediate member 30A is supported by the upper end portion of the protrusion 55.

[0053] A recessed accommodation portion 38 is formed in the rear end portion 35 of the intermediate member 30A to accommodate the upper end portion of the protrusion 55. When the scissors 10A are opened or closed, the upper end portion of the protrusion 55 is locked in the accommodation portion 38 in the rear end portion 35 of the intermediate member 30A, and the intermediate member 30A rotates together with the second member 12 relative to the first member 11, with the rotation axis RX serving as a fulcrum.

[0054] In the second embodiment, the intermediate member 30A is disposed so that the rear end portion 35 applies a force to the second member 12 via the protrusion 55 in a direction away from the first member 11. This force acts to increase the distance between the first member 11 and the second member 12 on the rear end side of the pivot shaft 16 and to decrease the distance between the first blade portion 11f and the second blade portion 12f. This force also acts to prevent the distance between the first blade portion 11f and the second blade portion 12f from increasing depending on the object being cut when the scissors 10A are in use, thereby preventing a decrease in the cutting performance of the scissors 10. This makes it possible to reduce the amount of effort required to open and close the scissors 10 while preventing a decrease in the cutting performance of the scissors 10.

[0055] The protrusion 55 is fixed to the second member 12 by screwing into a screw hole 58 provided in the second member 12. The screw hole 58 passes through the second member 12, and the protrusion 55 is screwed into the front surface side of the second member 12 and protrudes from the back surface side of the second member 12. The height by which the protrusion 55 protrudes from the second member 12 can be adjusted by changing the depth to which the protrusion 55 is screwed into the screw hole 58.

[0056] According to this configuration, by adjusting the height of the protrusion 55, the force applied from the rear end 35 of the intermediate member 30A to the second member 12 through the protrusion 55 can be adjusted. Therefore, it is easy to adjust the cutting performance of the scissors 10A and the ease of opening and closing the scissors 10A so that both are compatible. Furthermore, as described above, if the screw hole 58 is formed to penetrate the second member 12 and the protrusion 55 is screwed into the second member 12 from the surface side, it is even easier to adjust the height of the protrusion 55 from the surface side of the second member 12. Furthermore, by combining the adjustment of the height of the protrusion 55 with the adjustment of the position of the tip end 31 of the intermediate member 30A relative to the second member 12 using the threaded portion 16s of the pivot shaft 16, it is possible to more precisely adjust the cutting performance and the ease of opening and closing the scissors 10A.

[0057] As described above, according to scissors 10A of the second embodiment, intermediate member 30A, which is made of a flat, highly rigid plate-like member, can improve cutting performance and apply a force to second member 12 to make the opening and closing operation easier. Furthermore, by adjusting the height of protrusion 55, the cutting performance of scissors 10A and the ease of opening and closing scissors 10A can be easily adjusted.

[0058] 3. Other embodiments: The technology of the present disclosure is not limited to the configurations of the above-described embodiments, and can be modified, for example, as follows: All of the other embodiments described below are positioned as examples of modes for implementing the technology of the present disclosure, similar to the above-described embodiments.

[0059] (1) Alternative embodiment 1: The configuration of the pivoting mechanism 15, 15A including the intermediate member 30, 30A in each of the above embodiments may be applied to various types of barber scissors, such as pruning scissors and thinning scissors. It may also be applied to various types of scissors other than barber scissors. For example, it may be applied to scissors for cutting paper.

[0060] (2) Alternative embodiment 2: The intermediate members 30, 30A do not have to be made of plate-like members. The intermediate member 30 of the first embodiment may be made of an elastic member that generates elastic force by bending deformation of the portion between the front end portion 32 and the rear end portion 35, and may be substituted with, for example, a spring member made of wire. The intermediate member 30A of the second embodiment may be made of, for example, a straight rod-shaped member.

[0061] (3) Alternative embodiment 3: In each of the above-described embodiments, the first blade portion 11f of the first member 11 may constitute a moving blade, and the second blade portion 12f of the second member 12 may constitute a stationary blade.

[0062] (4) Alternative embodiment 4: In each of the above embodiments, the pair of bearings 41, 42, the multiple annular members 44, 45, the locking member 43, and the fixed plate 25 may be omitted. The tip end 31 of the intermediate member 30, 30A may not have the insertion hole 32. In this case, the tip end 31 of the intermediate member 30, 30A may be configured, for example, as an E-ring and may be supported on the rotating shaft 16 by being locked to a constricted portion provided on the rotating shaft 16. Alternatively, the tip end 31 of the intermediate member 30, 30A may be supported by being joined to the side surface of the rotating shaft 16. Even with this configuration, as long as the rotating shaft 16 is configured to be rotatable together with the second member 12 relative to the first member 11, the intermediate member 16 can be configured to rotate together with the second member 12. Furthermore, in each of the above embodiments, the holding member 21 and the threaded portion 16s of the rotating shaft 16 may be omitted.

[0063] (5) Alternative embodiment 5: In each of the above-described embodiments, the recess 50 for accommodating the intermediate member 30 may be provided only in the first member 11, or may be provided only in the second member 12. Furthermore, the recess 50 for accommodating the intermediate member 30 may be provided in both the first member 11 and the second member 12. It is sufficient that the recess 50 for accommodating the intermediate member 30 is provided in at least one of the first member 11 and the second member 12.

[0064] (6) Other embodiment 6: In the second embodiment described above, the protrusion 55 may be fixed to the second member 12 by a method other than screwing into the screw hole 58 provided in the second member 12. For example, the protrusion 55 may be welded to the second member 12. Also, in the second embodiment described above, the screw hole 58 provided in the second member 12 does not have to pass through the second member 12. The protrusion 55 may be fixed by being screwed into the bottomed screw hole 58 from the back side of the second member 12. Even with this configuration, the height of the protrusion 55 can be adjusted.

[0065] (7) Other embodiment 7: In each of the above-described embodiments, the rotating shaft portion 16 may rotatably fasten the first member 11 and the second member 12 by a configuration other than the screw portion 16s and the nut portion 23. Furthermore, the rotating shaft portion 16 may be held in the through-hole 18a of the first member 11 in a rotatable state by a method other than the holding member 21. [Explanation of symbols]

[0066] 10, 10A... scissors, 11... first member, 11f... first blade portion, 11r... first finger hook portion, 12... second member, 12f... second blade portion, 12r... second finger hook portion, 15, 15A... rotating mechanism, 16... rotating shaft portion, 16c... narrowed portion, 16h... head portion, 16s... threaded portion, 17... hit point, 18a, 18b... through hole, 21... holding member, 23... nut portion, 25... fixing plate, 26... screw, 27... thread groove, 30, 3 OA...intermediate member, 31...tip portion, 32...through hole, 35...rear end portion, 36...mooring portion, 38...accommodating portion, 41...first bearing, 42...second bearing, 43...locking member, 44...first annular member, 45...second annular member, 47...rear end side hole portion, 48...ridge portion, 49...groove portion, 50...recess, 51...first recess, 52...second recess, 55...protrusion portion, 58...screw hole, BL...blade line, GP...gap, RX...rotating axis

Claims

1. A pair of scissors, a first member having a first blade portion at a tip end side and a first finger hook portion at a rear end side on which a user places a finger; a second member having a second blade portion at a tip end side and a second finger hook portion at a rear end side on which the user places a finger; a pivot shaft portion that penetrates through a central portion of each of the first member and the second member that are arranged in a stacked manner and rotatably fastens the first member and the second member; an intermediate member that is disposed between the first member and the second member, has a front end supported by the pivot shaft, and a rear end engaged with the second member at a position rearward of the pivot shaft, rotates together with the second member relative to the first member, and is disposed in a state in which the rear end applies a force to the second member in a direction away from the first member; a pair of bearings attached to the rotary shaft portion between the first member and the second member, the bearings sandwiching and supporting the tip end portion of the intermediate member with rolling elements; Scissors equipped with:

2. 2. The scissors according to claim 1, The intermediate member is composed of an elastic member that generates an elastic force by bending deformation of the area between the tip end and the rear end, and the elastic force urges the second member in a direction away from the first member through the rear end.

3. The scissors according to claim 1 or 2, the second member is provided with a protruding portion that protrudes from the second member below the rear end portion of the intermediate member and is fixed to the rear end portion, The intermediate member applies a force to the second member in a direction away from the first member via the rear end portion thereof and via the protrusion.

4. 4. The scissors according to claim 3, the protrusion is fixed to the second member by being screwed into a screw hole provided in the second member, A pair of scissors, wherein the height of the protrusion protruding from the second member is adjustable by the depth to which the protrusion is screwed into the screw hole.

5. The scissors according to any one of claims 1 to 4, The rear end of the intermediate member is positioned in a width direction of the second member closer to the side end opposite the side end having the blade line of the second blade portion.

6. The scissors according to any one of claims 1 to 5, At least one of the first member and the second member has a recess for accommodating the intermediate member.

7. The scissors according to any one of claims 1 to 6, the rotation shaft portion has a thread portion that screws into a thread groove provided in a through hole of the second member through which the rotation shaft portion is inserted, A pair of scissors, wherein a holding member for rotatably holding the pivot shaft portion is disposed within a through hole of the first member through which the pivot shaft portion is inserted.

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