WO2023277121A1 - 変形爪矯正具 - Google Patents

変形爪矯正具 Download PDF

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Publication number
WO2023277121A1
WO2023277121A1 PCT/JP2022/026171 JP2022026171W WO2023277121A1 WO 2023277121 A1 WO2023277121 A1 WO 2023277121A1 JP 2022026171 W JP2022026171 W JP 2022026171W WO 2023277121 A1 WO2023277121 A1 WO 2023277121A1
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WIPO (PCT)
Prior art keywords
pair
deformed nail
locking portions
deformed
spring
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PCT/JP2022/026171
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English (en)
French (fr)
Japanese (ja)
Inventor
浩輝 根来
泰行 人見
源太 山田
隆行 井村
Original Assignee
マルホ発條工業株式会社
マルホ株式会社
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Application filed by マルホ発條工業株式会社, マルホ株式会社 filed Critical マルホ発條工業株式会社
Priority to JP2023532046A priority Critical patent/JP7410354B2/ja
Publication of WO2023277121A1 publication Critical patent/WO2023277121A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices ; Anti-rape devices
    • A61F5/01—Orthopaedic devices, e.g. long-term immobilising or pressure directing devices for treating broken or deformed bones such as splints, casts or braces
    • A61F5/11—Devices for correcting deformities of the nails

Definitions

  • the present invention relates to a deformed nail corrector for correcting deformed nails such as ingrown toenails and ingrown toenails.
  • An ingrown toenail is a condition in which both edges of the nail are curved inward, and it may be accompanied by inflammation and pain due to skin pinching and skin irritation.
  • An ingrown toenail is a condition in which the tip or side edge of the nail penetrates into the skin around the nail and causes chronic inflammation.
  • a spring main body portion having a spring property formed by forming a wire rod into a wavy shape, and claws provided at both ends of the spring main body portion.
  • a spring-like incurvated nail corrector has been proposed that includes a pair of hooks hooked to the side edges of the nail (see, for example, Patent Document 1).
  • each of the pair of hooks is formed by bending the tip of a wire into a hook shape toward the spring main body.
  • one hook is hooked on one of the left and right side edges of the nail, and the other hook is hooked on the toe side. It is attached to the nail by moving it to the other of the left and right side edges.
  • the deformed nail corrector comprises: A deformed nail corrector for correcting a deformed nail, a pair of locking portions formed from wire rods bent in an arc shape and having at least an arc-shaped portion locked to the rear side of the distal end portion of the deformed nail when the deformed nail corrector is attached to the deformed nail; a body portion having a wavy spring formed by bending a wire into a wavy shape, and having both ends in the extending direction connected to the pair of locking portions; The pair of locking portions and a facing portion facing a part of the pair of locking portions on the central side of both end portions of the main body that are continuous with the pair of locking portions are the main body.
  • the deformed claw inserted between the pair of locking portions and the opposing portion from the side perpendicular to the extending direction of the body portion and the inner side of the pair of locking portions in the extending direction of the main body portion. pinch the tip of the
  • the deformed nail corrector comprises a pair of engaging portions, and an opposing portion facing a portion of the pair of engaging portions on the central side of both end portions of the main body that are continuous with the pair of engaging portions. and a deformed claw inserted between the pair of locking portions and the opposing portion from the side perpendicular to the extending direction of the main body portion and the inside of the pair of locking portions in the extending direction of the main body portion. pinch the tip of the As a result, first, the deformed nail is attached to the deformed nail corrector by inserting the distal end portion of the deformed nail between the pair of locking portions and the opposing portion from the side perpendicular to the extending direction of the main body portion.
  • each of the pair of locking portions is extended to the side edge of the distal end portion of the deformed claw.
  • the tip portion of the deformed claw can be sandwiched by both side edges in the width direction by the pair of engaging portions and the opposing portion. Therefore, the pair of locking portions can be relatively easily locked to the rear side of the distal end portion of the deformed nail, so that the deformed nail corrector can be easily attached to the deformed nail.
  • each of the pair of locking portions has at least an arc-shaped portion locked to the rear side of the distal end portion of the deformed nail when the deformed nail corrector is attached to the deformed nail.
  • FIG. 1 is a plan view of a deformed nail corrector according to an embodiment of the present invention
  • FIG. 1 is a side view of a deformed nail corrector according to an embodiment
  • FIG. 4 is a side view showing a state in which the deformed nail corrector according to the embodiment is attached to the deformed nail
  • FIG. 4 is a plan view showing a state in which the deformed nail corrector according to the embodiment is attached to the deformed nail
  • FIG. 5 is a diagram for explaining a method of attaching the deformed nail corrector to the deformed nail according to the embodiment
  • It is a figure for demonstrating a narrowing ratio.
  • FIG. 10 is a plan view of a deformed nail corrector according to a modification
  • FIG. 10 is a plan view of a deformed nail corrector according to a modification
  • FIG. 11 is a side view of a deformed nail corrector according to a modification
  • FIG. 5C is a side view of a deformed nail corrector according to a modification as seen from a direction different from that of FIG. 5B
  • FIG. 11 is a side view of a deformed nail corrector according to a modification
  • FIG. 11 is a side view of a deformed nail corrector according to a modification
  • FIG. 10 is a plan view of a deformed nail corrector according to a modification
  • FIG. 10 is a plan view of a deformed nail corrector according to a modification
  • FIG. 10 is a plan view of a deformed nail corrector according to a modification
  • FIG. 11 is a side view of a deformed nail corrector according to a modification
  • the deformed nail corrector according to the present embodiment is for correcting deformed nails such as so-called ingrown toenails and ingrown toenails.
  • the deformed nail corrector is formed of a wire rod bent in an arc, and has a pair of locking portions that engage at least the arc-shaped portion on the rear side of the distal end portion of the deformed nail when the deformed nail corrector is attached to the deformed nail. and a body portion having a wave spring formed by bending a wire into a wave shape, and having both end portions in the extension direction thereof connected to a pair of engaging portions.
  • a pair of locking portions and a facing portion facing a portion of the pair of locking portions on the central side of both end portions of the main body that are continuous with the pair of locking portions are formed into a pair of locking portions.
  • the distal end portion of the deformed claw inserted between the pair of locking portions and the opposing portion from the side perpendicular to the direction in which the portions are arranged and the inner side of the pair of locking portions in the direction in which the pair of locking portions are arranged. sandwiched.
  • a deformed nail corrector 1 includes a pair of engaging portions 11 formed of a wire rod bent in an arc, and two ends formed of a wire rod in the extending direction. and a body portion 12 each of which is continuous with the pair of locking portions 11 .
  • a pair of locking portion 11 and body portion 12 can be produced by bending a single wire rod.
  • the wire for example, a wire made of a material selected from NiTi alloy, stainless steel (eg SUS304) and Co alloy can be used. Alternatively, a wire made of a resin such as PEEK (polyetheretherketone) may be used as the wire.
  • the diameter of the wire can be, for example, 0.35 mm or more and 0.45 mm or less.
  • the wire is not limited to one having a circular cross section, and may be a so-called square wire having a rectangular cross section or a wire having another cross section.
  • the main body 12 has a wave spring 12a formed by bending a wire into a wave within one first virtual plane VPL1 shown in FIG. 1B.
  • the number of waves of the wave spring 12a is not particularly limited, and is set to 1 or more and 9 or less, for example. Further, the wave number of the wave spring 12a shown in FIG. 1A can be set to 3 or more and 9 or less, for example. Here, the number of waves corresponds to the number of bent portions positioned on either side of the wave spring 12a in the Y-axis direction. Further, the amplitude L2 of the wave spring 12a can be set to, for example, 2.4 mm or more and 11.0 mm or less, and is preferably set to 6.0 mm or more and 8.0 mm or less.
  • the pair of locking portions 11 are formed by arcuately bending a wire within the same second virtual plane VPL2 shown in FIG. 1B.
  • the second virtual plane VPL2 is parallel to the first virtual plane VPL1, and is separated from the first virtual plane VPL1 by a preset distance L3 in a direction orthogonal to the first virtual plane VPL1. That is, the pair of locking portions 11 are separated from the wave spring 12a by a preset distance L3 in the Z-axis direction.
  • This distance L3 is set, for example, based on the thickness of a typical deformed nail N, and is set to about 0.8 mm, for example. Further, as shown in FIG.
  • the center C1 of the pair of locking portions 11 passes through the width direction of the wave spring 12a of the body portion 12, that is, the center in the Y-axis direction, and the direction in which the pair of locking portions 11 are arranged. That is, the virtual axis JS1 extending in the X-axis direction is shifted in the same direction perpendicular to the virtual axis JS1 and parallel to the first virtual plane VPL1, ie, the +Y direction side.
  • the wave spring 12a is arranged closer to the proximal end than the distal end of the deformed nail N. As shown in FIG.
  • the arc-shaped portions 11a of the pair of locking portions 11 are located on the back side of the tip portion NT of the deformed nail N, ie, the tip, when the deformed nail corrector 1 is attached to the deformed nail N. It is locked on the -Z direction side of the part NT.
  • the wave spring 12a is in a stretched state so that its length in the X-axis direction is longer than its natural length. Then, as shown in FIG. 2A , the pair of locking portions 11 and the body portion 12 are located on the central portion side in the extending direction of the pair of locking portions 11 and the main body portion 12 from both end portions continuous with the pair of locking portions 11 .
  • the tip portion NT of the deformed claw N is sandwiched between the portion and the opposing portion 12b.
  • the restoring force of the stretched wave spring 12a also acts in the direction in which the engaging portion 11 sandwiches the tip portion NT of the deformed claw N in the X-axis direction.
  • the main body portion 12 is curved along the deformed claw N, and the restoring force of the main body portion 12 acts on the portion of the deformed claw N where the locking portion 11 is locked in the direction of correcting the deformed claw N. do.
  • the engaging portion 11 of the deformed nail corrector 1 is moved from the outside of the tip portion side of the deformed nail N to the back side of the tip portion NT of the deformed nail N, that is, the tip portion NT. - Insert it in the Z direction.
  • the engaging portion 11 is moved to the deformed claw N. along the tip edge NE of the deformed claw N to both side edges in the width direction of the tip portion NT of the deformed claw N.
  • the deformed nail corrector 1 is attached to the deformed nail N in a state in which the distal end NT of the deformed nail N is sandwiched between the pair of engaging portions 11 and the opposing portion 12b at both side edges in the width direction.
  • a ratio to the distance W1 between the two ends is defined as a narrowing ratio.
  • the other engaging portion 11 is displaced.
  • the applied load is defined as bending load.
  • the aforementioned bending load is set to about 1 N when the deformed nail N is attached to the deformed nail N, which is 70%. If the wave number of the wave spring 12a of the deformed nail corrector 1 is 3 or more and 9 or less, and the amplitude of the wave spring 12a is 6.0 mm or more and 8.0 mm or less, the deformed nail corrector 1 has a narrowing ratio of 50. % to 70%, the aforementioned bending load can be set to about 1N. Therefore, it is preferable that the wave number of the wave spring 12a is set to 3 or more and 9 or less, and the amplitude L2 of the wave spring 12a is set to 6.0 mm or more and 8.0 mm or less.
  • a facing portion 12b facing a part of the pair of locking portions 11 is between the pair of locking portions 11 and the facing portion 12b from the inside of the pair of locking portions 11 in the -Y direction side and the X axis direction. clamps the tip portion NT of the deformed claw N inserted into.
  • the tip NT of the deformed nail N is inserted from the -Y direction side of the deformed nail corrector 1 between the pair of locking portions 11 and the opposing portion 12b, thereby causing the deformed nail corrector 1 to
  • the deformed claw N is held between the pair of engaging portions 11 and the deformed claw N while maintaining the state in which the tip portion NT of the deformed claw N is held between the pair of engaging portions 11 and the opposing portion 12b
  • each of the pair of engaging portions 11 is held by the deformed claw N
  • the tip NT of the deformed claw N is slid along the tip edge of the deformed claw N to the side edge of the tip NT, and the tip NT of the deformed claw N is sandwiched at both side edges in the width direction by the pair of locking portions 11 and the opposing portion 12b.
  • the pair of locking portions 11 can be relatively easily locked to the rear side of the tip portion NT of the deformed nail N, so that the deformed nail corrector 1 can be attached to the deformed nail N easily.
  • the tip NT of the deformed claw N can be sandwiched between the pair of locking portions 11 and the facing portion 12b at both side edges in the width direction, the correction force of the deformed claw N can be increased.
  • the arc-shaped portions 11a of the pair of locking portions 11 are locked to the rear side of the tip portion NT of the deformed nail N when the deformed nail corrector 1 is attached to the deformed nail N. As shown in FIG.
  • the arcuate portion 11a of the locking portion 11 contacts the fingertip FE located on the back side of the deformed claw N. Since it contacts, it can suppress that a part of latching
  • the pair of locking portions 11 are inserted into the back side of the tip portion NT of the deformed nail N from the outside of the tip edge NE side of the deformed nail N.
  • the deformed nail corrector 1 is attached to the deformed nail N by sliding the pair of engaging portions 11 to both sides of the distal end portion NT of the deformed nail N in the width direction.
  • the deformed nail corrector 1 can be attached to the deformed nail N relatively easily, and the restoring force of the body portion 12 of the deformed nail corrector 1 can be efficiently transmitted to the deformed nail N. can.
  • the pair of locking portions 11 are arranged in the extension direction of the body portion 12 in the Z-axis direction rather than the two end portions that are continuous with the pair of locking portions 11 respectively. It is separated from the opposing portion 12b on the central side by a preset distance.
  • the tip portion NT of the deformed claw N is positioned closer to the central portion in the extending direction than the pair of locking portions 11 and both end portions that are continuous with the pair of locking portions 11 of the main body portion 12 in the Z-axis direction. , and the opposing portion 12b. Therefore, the deformed nail corrector 1 can be firmly fixed to the tip NT of the deformed nail N.
  • the center C1 of each of the pair of engaging portions 11 of the deformed nail corrector 1 according to the present embodiment is displaced in the +Y direction from the virtual axis JS1 passing through the center of the wave spring 12a of the body portion 12 in the width direction. ing.
  • the wave spring 12a of the main body portion 12 is pushed closer to the proximal end than the distal end edge NE of the deformed nail N. can be placed on the side.
  • the pair of locking portions 11 are not locked closer to the base end than the tip NT of the deformed nail N, and the wave spring 12a is prevented from protruding from the tip edge NE of the deformed nail N, thereby correcting the deformed nail.
  • the tool 1 can be attached to the deformed nail N. Therefore, the deformed nail N of the deformed nail corrector 1 caused by part of the wave spring 12a protruding from the tip edge NE of the deformed nail N can be prevented without giving the user an uncomfortable feeling when wearing the deformed nail corrector 1. can be prevented from falling off.
  • the pair of locking portions 11 and main body portion 12 according to the present embodiment are formed continuously and integrally from one wire made of a material selected from NiTi alloy, stainless steel and Co alloy.
  • the deformed nail corrector 1 can be manufactured only by performing the step of bending one wire, so that the number of parts required for the deformed nail corrector 1 can be reduced, and the deformed nail can be reduced accordingly.
  • the cost of the correction tool 1 can be reduced.
  • a deformed nail corrector 2 includes a pair of locking portions 21 and a body portion 22 having wave springs 22a and having both ends in the extending direction continuous with the pair of locking portions 21. .
  • the pair of locking portions 21 is formed of a wire material bent in an arc shape, as in the embodiment, and when the deformed nail corrector 2 is attached to the deformed nail, at least the arcuate portion 21a is formed at the distal end portion of the deformed nail. locked behind the The pair of locking portions 21 and the portion 22b of the body portion 22, which is closer to the central portion in the extending direction than both end portions continuous with the pair of locking portions 21, deform the deformed nail corrector 2. The tips of the deformed claws are clamped while attached to the claws.
  • the same reference numerals as in FIG. 5C denote the same configurations as in the above-described modified example.
  • the protruding portion 31b is formed by, for example, bending the tip portion of the wire forming the locking portion 31 in the direction toward the main body portion 22. As shown in FIG. According to this configuration, when the deformed nail corrector 3 is attached to the deformed nail, the tip of the projecting portion 31b is pressed against the back side of the tip of the deformed nail, so that the deformed nail of the deformed nail corrector 3 does not move. falling off is suppressed.
  • the second virtual plane VPL2 corresponding to each of the pair of locking portions 11 and the first virtual plane VPL1 corresponding to the wave spring 12a are parallel to each other.
  • the present invention is not limited to this, and the second virtual plane VPL42 corresponding to each of the pair of locking portions 41 is inclined with respect to the first virtual plane VPL1, such as the deformed nail corrector 4 shown in FIG. may be That is, the central axis J41 of the pair of locking portions 41 may be inclined with respect to the normal direction of the first virtual plane VPL1, that is, the Z-axis direction.
  • a main body portion 52 having a pair of locking portions 51 and a wave spring 52a and having both ends in the extending direction continuous with the pair of locking portions 51, , and the pair of locking portions 51 may have a shape arranged outside the body portion 52 in the Y-axis direction, that is, on the +Y direction side of the body portion 52 .
  • the stop portion 51 is wound clockwise when viewed from the +Z direction, and the other locking portion 51 located on the right side in FIG.
  • the stop portion 51 is wound counterclockwise when viewed from the +Z direction.
  • a facing portion 52a1 of the body portion 52 facing the locking portion 51 in the Z-axis direction and the locking portion 51 are connected via a connecting portion 52c.
  • the connecting portion 52c has a linear connecting portion main body 521c, one end of which is continuous with the locking portion 51, and a bent portion 52d that is continuous with the wave spring 52a on the wave spring 52a side of the connecting portion main body 521c.
  • the pair of locking portions 51 are formed of a wire material bent in an arc, as in the embodiment. Locked.
  • the pair of engaging portions 51 and the facing portion 52a1 of the body portion 52 sandwich the distal end portion of the deformed nail while the deformed nail corrector 5 is attached to the deformed nail.
  • the facing portions 52a1 of the main body portion 52 intersect with the connecting portion 52c and overlap in the Z-axis direction.
  • the opposing portion 52a1 is located on the -Z direction side of the connecting portion 52c.
  • the bent portion 52d is a first bent portion that is arcuately bent so as to protrude toward the -Y direction in a plane perpendicular to the Z-axis direction.
  • the amplitude L52 of the wave spring 52a can be set to, for example, 2.4 mm or more and 11.0 mm or less, preferably 6.0 mm or more and 8.0 mm or less.
  • the length L51 in the Y-axis direction of the portion including the engaging portion 51, the opposing portion 52a1, and the connecting portion 52c of the main body portion 52 is 1.3 to 1.5 times the amplitude 52 of the wave spring 52a. can be set.
  • the length L51 can be set to 10 mm.
  • the length L53 of the deformed nail corrector 5 in the X-axis direction can be set to, for example, 12 mm or more and 14 mm or less.
  • the curvature radius of the bent portion 52d can be set to 1 mm or more and 1.5 mm or less.
  • the number of waves of the wave spring 52a is not limited to the number corresponding to two and a half cycles shown in FIG. .
  • the length L53 of the deformed nail corrector 5 in the X-axis direction can be set longer than 14 mm, for example, according to the wave number of the wave spring 52a.
  • the opposing portions 52a1 at both ends of the wave spring 52a in the X-axis direction intersect with the connecting portion 52c, overlap in the Z-axis direction, and are positioned on the -Z direction side of the connecting portion 52c.
  • the connecting portion 52c has a bent portion 52d which is continuous with the wave spring 52a on the side of the wave spring 52a and is bent in an arc so as to protrude in the -Y direction.
  • the main body portion 51 can be locked in a state where the pair of locking portions 51 are attached to the distal end portions of the deformed claws. It is arranged closer to the proximal end of the deformed claw than in the embodiment. As a result, the correction force of the deformed nail corrector 5 can be applied to the base end side of the deformed nail, so that the deformed nail can be corrected effectively.
  • a main body portion 62 having a pair of locking portions 61 and a wave spring 62a and having both ends in the extending direction continuous with the pair of locking portions 61, and the wave spring 62a may have a first sub-spring 621a located in the center in the X-axis direction and second sub-springs 622a located on both sides of the first sub-spring 621a in the X-axis direction.
  • the amplitude L61 of the second sub-spring 622a is longer than the amplitude L62 of the first sub-spring 621a.
  • a virtual axis JS61 passing through the width direction of the first sub-spring 621a, that is, the center in the Y-axis direction and extending in the X-axis direction passes through the center in the Y-axis direction of the second sub-spring 622a and extends in the X-axis direction. It is shifted in the -Y direction from the existing virtual axis JS62.
  • One of the pair of locking portions 61 located on the left side in FIG. 9 is wound clockwise when viewed from the +Z direction, and the other locking portion 61 located on the right side in FIG.
  • the portion 61 is wound counterclockwise when viewed from the +Z direction. Also, a facing portion 62a1 of the second sub-spring 622a facing the locking portion 61 in the Z-axis direction and the locking portion 61 are connected via a connecting portion 62c.
  • the connecting portion 62c has a linear connecting portion main body 621c, one end of which is continuous with the locking portion 61, and a bent portion 62d that is continuous with the second sub-spring 622a on the side of the second sub-spring 622a in the connecting portion main body 621c. .
  • the pair of locking portions 61 are formed of a wire material bent in an arc, as in the embodiment. Locked. With the deformed nail corrector 6 attached to the deformed nail N, the distal end of the deformed nail is sandwiched between the pair of locking portions 61 and the facing portion 62a1 of the second sub-spring 622a. Also, the facing portions 62a1 of the second sub-springs 622a intersect with the connecting portions 62c and overlap in the Z-axis direction. Here, the facing portion 62a1 is located on the -Z direction side of the connecting portion 62c.
  • the length in the Y-axis direction of the portion including the locking portion 61 and the connecting portion 62c is equal to the amplitude L61 of the second sub-spring 622a.
  • the bent portion 62d is a first bent portion which is bent in an arc so as to protrude toward the -Y direction in a plane perpendicular to the Z-axis direction.
  • the amplitude L62 of the first sub-spring 621a can be set to, for example, 2.4 mm or more and 11.0 mm or less, preferably 6.0 mm or more and 8.0 mm or less.
  • the amplitude L61 of the second sub-spring 622a can be set to 1.3 to 1.5 times the amplitude L62 of the first sub-spring 621a.
  • the amplitude L61 of the second sub-spring 622a should be set to 10 mm.
  • the length L63 of the deformed nail corrector 6 in the X-axis direction can be set to, for example, 12 mm or more and 14 mm or less.
  • the curvature radius of the bent portion 62d can be set to 1 mm or more and 1.5 mm or less.
  • the number of waves of the first sub-spring 621a is not limited to the number corresponding to one cycle shown in FIG. 9, and may be the number corresponding to one cycle or more, for example, two or three cycles.
  • the length L63 of the deformed nail corrector 6 in the X-axis direction can be set longer than 14 mm, for example, according to the wave number of the first sub-spring 621a.
  • the amplitude L61 of the second sub-spring 622a is longer than the amplitude L62 of the first sub-spring 621a.
  • a body portion 72 having a pair of locking portions 71 and a wave spring 72a and having both ends in the extending direction connected to the pair of locking portions 71 respectively.
  • the wave spring 72a has a first sub-spring 721a located in the center in the X-axis direction and second sub-springs 722a located on both sides of the first sub-spring 721a in the X-axis direction, good too.
  • one locking portion 71 located on the left side in FIG. 10A is wound counterclockwise when viewed from the +Z direction, and the other locking portion 71 located on the right side in FIG.
  • the locking portion 71 is wound clockwise when viewed from the +Z direction. Also, a facing portion 72a1 of the second sub-spring 722a facing the locking portion 71 in the Z-axis direction and the locking portion 71 are connected via a connecting portion 72c.
  • the connecting portion 72c includes a linear connecting portion main body 721c, a bent portion 722c continuous with the connecting portion main body 721c on the locking portion 71 side of the connecting portion main body 721c, and a second sub-spring 722a side of the connecting portion main body 721c on the second sub-spring 722a side. and a bent portion 72d that is continuous with the sub-spring 722a.
  • the bent portion 72d is bent in an arc so as to be convex in the -Y direction in a plane orthogonal to the Z-axis direction, and is located on the +Y direction side of the edge of the first sub-spring 721a on the -Y direction side. It is the first bent portion.
  • the bent portion 722c is a second bent portion that is bent like a hook so as to protrude toward the +Y direction in a plane orthogonal to the X-axis direction.
  • the facing portion 72a1 is located at the end of the second sub-spring 722a on the side opposite to the first sub-spring 721a.
  • a virtual axis JS71 passing through the width direction of the first sub-spring 721a, that is, the center in the Y-axis direction and extending in the X-axis direction passes through the center in the Y-axis direction of the second sub-spring 722a and extends in the X-axis direction. It is shifted in the -Y direction from the existing virtual axis JS72.
  • the pair of locking portions 71 are formed of wire rods bent in an arc shape, and when the deformed nail corrector 7 is attached to the deformed nail, at least the arcuate portions 71a are at the tip of the deformed nail. Locked on the back side. Then, as shown in FIG. 10B, the pair of locking portions 71 and the opposed portions 72a1 of the second sub-springs 722a are arranged at the distal end portion of the deformed nail N with the deformed nail corrector 7 attached to the deformed nail N. sandwiched. Furthermore, as shown in FIG. 10A, the opposing portions 72a1 of the second sub-springs 722a intersect with the aforementioned connecting portions 72c and overlap in the Z-axis direction.
  • the facing portion 72a1 is located on the -Z direction side of the connecting portion 72c. Also, the length in the Y-axis direction of the portion including the locking portion 71, the connecting portion 72c, and the bent portion 72d is shorter than the amplitude L71 of the second sub-spring 722a by a length L74.
  • the amplitude L72 of the first sub-spring 721a can be set to, for example, 2.4 mm or more and 11.0 mm or less, preferably 6.0 mm or more and 8.0 mm or less.
  • the amplitude L71 of the second sub-spring 722a can be set to 1.3 to 1.5 times the amplitude L72 of the first sub-spring 721a.
  • the amplitude L71 of the second sub-spring 722a should be set to 8 mm.
  • the length L73 of the deformed nail corrector 7 in the X-axis direction can be set to, for example, 12 mm or more and 14 mm or less.
  • the curvature radius of the bent portion 72d can be set to 1 mm or more and 1.5 mm or less.
  • the number of waves of the first sub-spring 721a is not limited to the number corresponding to one cycle shown in FIG. 10A, and may be the number corresponding to one or more cycles, for example, two or three cycles.
  • the length L73 of the deformed nail corrector 7 in the X-axis direction can be set longer than 14 mm, for example, according to the wave number of the first sub-spring 721a.
  • the bent portion 72d has a shape located on the +Y direction side of the edge of the first sub-spring 721a on the -Y direction side. This can prevent the wave spring 72a from rising from the surface of the deformed nail when the deformed nail corrector 7 is attached to the deformed nail.
  • the connecting portion 72c has a bent portion 722c that is bent in a hook shape so as to protrude toward the +Y direction in the plane orthogonal to the X-axis direction. .
  • the restoring force of the bent portion of the bent portion 722c increases the mounting force of the locking portion 71 to the nail N.
  • the present invention is suitable as a deformed nail corrector for correcting a deformed nail.

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  • General Health & Medical Sciences (AREA)
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PCT/JP2022/026171 2021-07-01 2022-06-30 変形爪矯正具 WO2023277121A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405547A (en) * 1945-04-26 1946-08-13 Harold C Armagost Ingrown nail correcting device
WO2007018371A1 (en) * 2005-08-08 2007-02-15 Chung Cho Apparatus for correcting toenail
DE102016007820A1 (de) * 2016-06-24 2017-12-28 Alexander Reich Nagelspange

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405547A (en) * 1945-04-26 1946-08-13 Harold C Armagost Ingrown nail correcting device
WO2007018371A1 (en) * 2005-08-08 2007-02-15 Chung Cho Apparatus for correcting toenail
DE102016007820A1 (de) * 2016-06-24 2017-12-28 Alexander Reich Nagelspange

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