JP2007244851A - Deformed nail corrector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrector to be easily attached/detached, capable of effectively correcting a deformed nail such as an ingrown nail. <P>SOLUTION: A plurality of tongue pieces 11 projecting along one side end edge of an elastic metal piece 10 are folded, and a claw 17 is formed in the end edge of a correction plate 16 by an infolding part 18 and a bending part 19. The corrector is attached by inserting the correction plate 16 between the deformed nail 20 and the tip of the nail, and hooking the claw 17 at the tip 21 of the deformed nail 20. The claw 17 formed by the infolding part 18 and the bending part 19 has large deformation stress, and securely attaches the corrector 15 to the tip 21 of the nail to prevent the accidental dropping of the corrector. The correction force generated from resiliency of the correction plate 16 is applied to the deformed nail 20 to remedy the ingrown nail, etc. A deformed nail corrector with a double-structured claw formed by bending and infolding both ends of a crushed wire can be also used. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a corrector that can be easily attached to a deformed nail such as a wound nail or an ingrown nail and is used to eliminate the deformation.

Conventionally, various deformed nail correctors have been proposed to correct wound nails and ingrown nails. For example, a nail corrector (patent document 1) that affixes a small piece with an appropriate restoring force to the surface of the wound nail and gradually corrects the wound nail to a normal form, and a pair of folds applied to the widthwise ends of the deformed nail There is a curly nail correction tool (Patent Document 2) that applies an elastic force to the end and pulls it, and a correction tool (Patent Document 3) that applies a tensile force in a direction opposite to the deformation direction to both side edges of the nail.
JP 2001-37535 JP Japanese Patent Laid-Open No. 2003-265508 JP 2001-276104 A

  In the method of sticking the correction tool on the surface of the nail, the end of the correction tool in the nail width direction is turned up and easily peeled off. If the adhesive used at the time of wearing oozes between the nail and the corrector, it may cause discomfort to the user, and it is necessary to remove the adhesive from the nail surface after removing the corrector. This is why sticking type orthodontic tools are avoided. With a correction tool that applies a tensile force to the folded end or locking part applied to the widthwise end of the deformed nail, it is necessary to insert the folded end or locking part to the widthwise end of the deformed nail, causing pain to the patient. Is a drawback.

Depending on the type of the corrective tool, it may be necessary to perform a procedure such as drilling a mounting hole for a locking part in a part of the deformed nail, which makes it difficult for the patient to wear and remove it, and causes more pain to the patient. .
In order to facilitate the mounting / removal of the correction tool, a method of engaging the folded end of the correction plate with the nail can be considered. However, in the method of engaging the ordinary folded end, it is necessary to increase the deformation resistance of the folded end so that the angle between the folded end and the correction plate does not increase.

The present inventors paid attention to the fact that it is easy to attach / remove a correction tool that engages the folded end of the correction plate with the deformed nail, and studied various means for preventing the angle between the correction plate and the return end from expanding. As a result, when the hook is formed by folding and folding in place of simple folding, the angle between the straightening plate and the folded end is kept almost constant, and it is attached to the deformed nail in a stable wearing state. I found out.
The present invention pays attention to the folding and folding double folding structure effective for improving the performance of the orthodontic tool. It is easy to put on and take off, does not accidentally drop off, and gives a stable correction force to the deformed nail. An object of the present invention is to provide a corrector that effectively corrects ingrown nails and the like.

  The deformed nail correction tool of the present invention has a correction plate or a correction portion that is long in the nail width direction and is formed by cutting, punching, or bending an elastic metal plate, and a plurality of claws that mesh with the toe of the deformed nail. The claws are a plurality of tongue pieces projecting from the toe side edge of the correction plate or a folding part formed by folding or bending of the projecting part extending from both ends of the correction tool in the nail width direction, and a double structure of the folding part. It is characterized by having.

  As a material for the deformed nail corrector, an approximately strip-shaped elastic metal piece collected from a cold-rolled plate can be used. The elastic metal piece has a longitudinal direction as a nail width direction of the correction tool, and a plurality of tongue pieces project from the toe side edge. By folding and bending a plurality of tongue pieces, a claw having a double structure of a folded portion and a folded portion is formed at the toe side edge of the correction plate. The plurality of claws may be projected from the toe side edge at equal intervals, near the center, or near both ends in the nail width direction of the correction plate.

  A crushed wire obtained by crushing a round wire in the radial direction can also be used as a material for the correction tool. In a correction tool made of a crushed wire, the crushed wire is formed into a substantially square shape to form a correction portion, and rivets are formed at both ends of the correction portion. The swivel has a double structure of a folded portion formed by folding and bending a protruding portion extending from both ends of the correction portion in the nail width direction, and a folded portion.

Effects and embodiments of the invention

As the raw material of the deformed nail corrector, a metal strip cut from a cold-rolled sheet, a crushed wire obtained by crushing a round wire in the radial direction, or the like is used. A double-structured claw formed by folding and bending is applied to the orthodontic tool made from each material, facilitating reliable mounting and removal while exhibiting high deformed nail correction performance.
Although conventional orthodontic tools that constrain both ends of the deformed nail in the width direction and apply a correction force to the deformed nail in the opposite direction to the warp of the deformed nail require troublesome work to install and remove, it is inconvenient In the correction tool of the present invention made of a cold-rolled plate, since the attachment portion (claw) to the deformed nail is on the toe side edge of the correction plate, the correction plate is placed on the deformed nail while suppressing deformation in the toe direction. Can be bent and deformed in the warping direction.

Even with a correction tool made of crushed wire, the deformation behavior of the hook when the claws on both ends of the nail width direction are engaged with the deformed nail and the deformation behavior of the correction part that bends in the bending direction of the deformed nail are separated. It can be easily mounted and removed, and a large correction force can be stably applied to the deformed nail.
The double-folded claw is much more stable in the mounting state with respect to the deformed nail than the nail locking portion formed by a simple fold used in a conventional corrector. The performance comparison between the double-folded claw and the claw locking portion formed by simple folding can be explained as follows.

When installed spanker pawl engagement simply bending one end edge retaining portion 2 and the conventional orthotic (FIG. 1) to the modified pawl 20, contacts the Tsumegakaritome section 2 toe 21 only one location P ₁ To do. The fact that the contact point P ₁ between the claw locking part 2 and the toe 21 is limited to one place is derived from a simple molding method of the claw locking part 2.
The nail locking portion 2 folded back from the correction plate 1 is substantially parallel to the correction plate 1 when not attached to the deformation nail 20, but the nail tip of the deformation nail 20 is between the correction plate 1 and the nail locking portion 2. in a state where elaborate insert the 21 contacts the toe 21 at one point of contact points P _1, open claw engagement portion 2 at a constant inclination angle.

  Because of the one-point contact, the holding force of the claw locking portion 2 is weak, and it is difficult to obtain a stable wearing state. The opening of the claw locking portion 2 on the nail root side causes foreign matter to enter the gap between the claw locking portion 2 and the deformed claw 20, and promotes the floating of the claw locking portion 2. If the gap on the open part side of the claw locking part 2 is narrowed in order to improve the mounting property, it becomes difficult to mount the claw 20 on the deformed claw 20, so that there is a limit to narrowing the gap.

In the correction tool of the present invention (FIG. 2) in which the hook 6 is formed by double folding of the tongue protruding from the correction plate 1, two surfaces are defined by the folding part 4 and the folding part 5, respectively. There is a step between the edge of the bent portion and the bent portion 5. When the deformed claw 20 is inserted between the correction plate 1 and the claw 6, the claw 6 has a claw tip 21 of the deformed claw 20 at two positions P ₁ and P ₂ on the edge of the folded portion 4 and part of the inner surface of the folded portion 5. To touch.

Due to the contact at the two points P ₁ and P ₂ , the mounting stability is remarkably improved as compared with the straight folding corrector (FIG. 1). In addition, the double-fold structure increases the effective thickness of the claw 6 and increases the deformation stress (spring back force) of the claw 6 with respect to the claw tip direction, so that the force for holding the deformation claw 20 also increases. The increase in the deformation stress means that there is no opening generated in the claw locking portion 2 (FIG. 1) formed by simple folding, and the shape stability of the claw 6 is improved. The fact that the front end of the folding part 4 is regulated between the correction plate 1 and the bent part 5 is also effective in suppressing deformation of the hook 6.

  The increase in deformation stress due to the double structure is limited to the hook 6 and does not reach the correction plate 16 (FIG. 3) or the correction part 36 (FIG. 9), so that the corrector can be easily mounted and removed stably over a long period of time. The correction effect of the deformed nail 20 is improved. Furthermore, since the sharp edge of the hook 6 does not face the outside, it is possible to prevent the toe 21 and the fingertip from being wrinkled.

  In order to compare the effects of deformed nail correction and nail retention on simple and double folds, a rectangular strip with a length of 6.4 mm and a width of 2.2 mm cut from a SUS304 stainless steel plate with a thickness of 0.2 mm Cut a test piece with a length of 5mm tongue piece into the longitudinal edge and cut it out from a SUS304 stainless steel plate with a thickness of 0.2mm, bend the tongue piece, and make a simple fold with a length of 3mm. A claw locking portion 2 (FIG. 1) and a double-folded hook 6 (FIG. 2) were formed. For both the nail locking part 2 and the hook 6, the bending radius of curvature from the correction plate 1 was about 0.475 mm, and the distance between the correction plate 1 / nail locking part 2 and the correction plate 1 / folding part 4 was 0.95 mm.

Thickness: An aluminum plate with a thickness of 1.02mm is used as a virtual nail, and the edge of the aluminum plate is sandwiched between the correction plate 1 / claw locking part 2 and the correction plate 1 / claw 6 and the edge of the aluminum plate is the correction plate 1 / The load released from the clamping state by the nail locking part 2, the correction plate 1 / the hook 6 was measured. The minimum load necessary for pulling out was 70 g for the corrector having the nail locking portion 2 and 120 g for the corrector having the hook 6. Since there is a large difference in the pull-out force, it can be understood that the claws 6 having a double fold structure have a significantly larger claw holding force than the simple fold claw locking portion 2.

Next, a deformed nail corrector made of a metal strip cut out in a substantially strip shape from a cold-rolled sheet will be specifically described.
The deformed nail correction tool of this example uses an elastic metal piece 10 cut out or punched out from a cold-rolled sheet of elastic metal material as a material. The elastic metal piece 10 has a size corresponding to or smaller than the width direction length of the deformed claw, and a plurality of tongue pieces 11 protrude from the toe side edge. The formation position of the tongue piece 11 may be in the vicinity of the central portion (FIG. 3) along the length direction of the elastic metal piece 10 or in the vicinity of both ends in the length direction (FIG. 7). Alternatively, a plurality of tongue pieces 11 (FIG. 5) may be formed at equal intervals along the length direction of the elastic metal piece 10.

  As the material of the elastic metal piece 10, ordinary steel, alloy steel, stainless steel, copper alloy, titanium, titanium alloy, cobalt alloy, shape memory alloy and the like can be used as long as they have elasticity. When a material that may cause inflammation by metal ions is used for the elastic metal piece 10, the elastic metal piece 10 is surface-treated, or the metal surface is covered with a plating layer, a resin film, or the like. Prior to the collection of the elastic metal piece 10, if the material metal plate is hardened, the elastic force becomes high. Hardening includes work hardening, quench hardening, transformation strengthening, age hardening, precipitation strengthening and the like.

By folding and bending the tongue piece 11 protruding from the toe side edge of the elastic metal piece 10, a plurality of claws 17 having a double structure of the folding part 18 and the folding part 19 are formed. The claw 17 is a portion engaged with the toe 21 of the deformed claw 20.
The corrector 15 (FIG. 3) having a plurality of claws 17 at the center part in the nail width direction is suitable for a patient whose nails are elongated (FIG. 4a). The hook 17 is slightly opened from the correction plate 16 and the bent correction plate 16 is inserted between the fingertip and the toe 21. When the force applied to the hook 17 is released, the hook 17 is pressed to the outside of the toe 21, and the corrector 15 is fixed to the toe 21 (FIGS. 4b and 4c). With the nail width direction center portion sandwiched between the correction plate 16 and the claw 17, the elastic restoring force that the correction plate 16 tries to return to the original shape acts on the vicinity of both ends of the deformed nail 20 in the nail width direction from the inside. Therefore, the elastic restoring force efficiently becomes the deformed nail correction ability, and the deformed nail 20 is corrected.

  The corrector 15 (FIG. 5) provided with a plurality of claws 17 at equal intervals along the nail width direction is suitable for a patient whose deformed nail 20 has a normal length (FIG. 6a). The corrector plate 16 is slightly bent, the hook 17 is inserted between the fingertip and the toe 21, and the corrector plate 16 is placed on the outside of the toe 21 to fix the corrector 15 to the toe 21 (FIG. 6b, 6c). Also in this case, since the folding portion 18 of the hook 17 is pressed against the toe 21 from the inside, the toe 21 is sandwiched between the correction plate 16 and the hook 17. Further, since the toe 21 is inserted between the claw 17 and the correction plate 16 that are arranged at equal intervals along the nail width direction of the correction plate 16, the elastic restoring force of the correction plate 16 causes the deformation nail 20 to It acts as a deformed nail correction ability over the entire length in the nail width direction, and the deformed nail 20 is corrected. By shortening the length of the correction tool 15 in the nail width direction, only the deformed portion of the deformed nail 20 can be corrected. This type of corrector is suitable for patients with short deformed nails 20.

  Instead of providing a plurality of hooks 17 at equal intervals along the nail width direction, hooks 17 (FIG. 7) may be provided near both ends of the nail width direction. When the correction plate 16 is bent and the hook 17 is inserted between the fingertip and the toe 21 and the correction plate 16 is placed along the outer surface of the toe 21, the nail width direction of the toe 21 between the correction plate 16 and the hook 17 The vicinity of both ends is clamped (FIG. 8). Since the elastic restoring force of the correction plate 16 acts in the nail width direction of the deformed nail 20 in a state where both ends of the deformed nail 20 in the nail width direction are constrained, the deformed nail 20 is corrected similarly to the correction tool 15 of FIG. .

3, 5, and 7, since the plurality of hooks 17 are formed along the toe side edge of the correction plate 16, the correction tool 15 of FIG. 3, FIG. 17 effects can be ignored. Therefore, the correction plate 16 can be bent relatively easily in the longitudinal direction (claw width direction), and the elastic restoring force acts on the deformed nail as a correction force.
The correction plate 16 may be either a flat shape or a slightly curved shape corresponding to the toe. The curved shape is obtained by attaching a curvature corresponding to the shape of the deformed claw 20 to the correction plate 16 when the hook 17 is formed or before and after the formation of the hook 17.

  If the hook 17 is still formed, the desired shape may not be maintained by the spring back of the elastic metal piece 10. Strain and stress introduced at the time of bending tend to cause the shape of the corrector 15 to break. Therefore, strain relief annealing is performed as necessary before or after the formation of the hook 17. Depending on the material and heat treatment conditions, blueing treatment is possible and the elastic limit is further increased. The heat treatment conditions differ depending on the material of the elastic metal piece 10, but when a stainless steel plate is used as a raw material, bluing treatment for heating in a temperature range of 200 to 600 ° C, and strain relief annealing for heating in a temperature range of 600 to 800 ° C, The shape stability of the corrector 15 and the ability to correct deformed nails are improved. The heat treatment effect requires a heating temperature of 200 ° C. or higher. However, when heated at a high temperature of 800 ° C. or higher, the elastic metal piece 10 is softened and there is a concern that the elastic force is reduced.

  A claw 17 provided on the longitudinal edge (edge in the nail width direction) of the correction plate 16 allows the correction plate 16 to bend in the nail width direction and facilitates the mounting of the correction tool 15. After mounting, a plurality of claws 17 are engaged with the toe 21 of the deformed nail 20, and both ends of the correction plate 16 (FIG. 3) are pressed against both ends in the width direction of the deformed nail 20 by an elastic restoring force, or a curved correction plate 16 is curved. A force is applied to the deformed claw 20 so that both ends of (FIGS. 5 and 7) are elastically restored to the original shape. Therefore, the mounting state of the corrector 15 on the deformed nail 20 is stabilized, and the corrector 15 is prevented from falling off.

After several days have passed since the correction tool 15 is attached to the deformed nail 20, the nail grows with the elastic restoring force of the correction plate 16 applied in the width direction of the deformed nail 20, so Deformation is eliminated.
When the correction tool 15 is attached or detached, the correction tool 15 can be removed by a simple operation of bending the correction plate 16 in the deformation direction of the deformed nail 20 and pulling out the correction tool 15 in the direction of the toe. The fact that it can be easily removed is also an effect of the hook 17 provided on one side edge of the correction plate 16.

Sheet metal: A SUS304 cold-rolled steel sheet with a thickness of 0.8 mm, punched and processed into an elastic metal piece with four tongues 11 with a width of 1.5 mm and a length of 5 mm protruding from one side edge of a 22 mm x 3 mm straightening plate 16 Ten (FIG. 3) were collected. After the tip of the tongue piece 11 is bent, the tongue piece 11 is further bent at a position 1 mm from one side edge of the correction plate 16, thereby forming a hook 17 having a double structure of the folded portion 18 and the bent portion 19. did.
Next, a heat treatment of 500 ° C. × 30 minutes soaking to water quenching was performed to remove the stress and strain introduced in the bending process, and the hardness and consequently elasticity of the correction tool 15 were improved.

The manufactured deformed nail corrector 15 was applied to 10 subjects, and the course of correction of the wound nail was investigated. The degree of correction varies depending on the subject, but in early cases, the correction effect was seen about 3 days after wearing, and some subjects had their claw completely eliminated after one week, and almost all of them were wound after two weeks. The nails were eliminated. Even when the corrector 15 was removed after the nail was removed and the toes and fingertips were observed, no abnormality due to the pressing of the corrector 15 was detected.

Next, a deformed nail corrector made of a crushed wire will be specifically described.
The crushed wire 30 (FIG. 9a) is manufactured by cold working such as rolling or forging that crushes a normal wire having a circular cross section in the diameter direction. Since the crushed wire 30 is formed by cold working, it is harder and has a higher elastic restoring force than the round wire. Since a rolled texture similar to that of a cold rolled sheet is generated by cold working, the crushed wire 30 can be handled as a cold rolled sheet.

  The deformed nail corrector 35 (FIG. 9b), which uses the crushed wire rod 30 as a raw material, has hooks 37 formed at both ends of a correction portion 36 that is formed in a substantially square shape in plan view. The corrector 36 has a shape in which a square-shaped bending point 36a is located on the base side of the deformed nail 20 and both ends in the nail width direction are directed in the toe direction. Folding the portions protruding from both ends of the straightening portion 36, and forming the claw 37 having a double structure of the folding portion 38 and the folding portion 39 by folding the same is the same as the straightening tool 15 made of cold-rolled plate It is.

The corrector 35 made of the crushed wire 30 can be used to correct deformed nails without giving the discomfort due to the biting of the claws 37 into the fingertips.
Incidentally, when a round wire is used as a raw material, both ends of the wire are spirally processed to form a sandwiching portion, but a double spiral is required to obtain a sandwiching force that meets the purpose. However, in the double spiral, the gap between the fingertip and the deformed nail 20 tends to be excessively open. Further, in the case of correcting for toenails, the double spiral is liable to damage the socks, and the usability is poor. In this respect, the straightening tool 35 made of the crushed wire 30 can be used safely because the step between the straightening portion 36 and the claw 37 can be reduced and the sharp edge does not face the outside. In addition, the clamping force is improved by the double configuration of the folding portion 38 and the folding portion 39, and the corrector 35 is securely attached to the deformed nail 20 (FIG. 9c).

  A cold-drawn SUS304 stainless wire with a wire diameter of 0.7 mm was cold-rolled to a thickness of 0.4 mm, and a crushed wire with a length of 28 mm was collected. After bending both ends of the straightening portion 36, it is further bent at a position 2 mm from the bending tip, thereby forming a claw 37 having a double structure of the folding portion 38 and the bending portion 39. Finally, an opening angle of 120 degrees is formed. It was bent into a square shape to obtain the shape of FIG. 9b. After the processing, a heat treatment of 500 ° C. × 30 minutes soaking and water quenching was performed to remove the stress and strain introduced in the bending process, and the hardness and elasticity of the correction tool 35 were improved.

  The manufactured deformed nail corrector 35 was applied to 10 subjects, and the course of correction of the wound nail was investigated. The degree of correction varies depending on the subject, but in early cases, the correction effect was seen about 3 days after wearing, and some subjects had their claw completely eliminated after one week, and almost all of them were wound after two weeks. The nails were eliminated. Even when the corrector 35 was removed after the nail was removed and the toes and fingertips were observed, no abnormality due to the pressing of the corrector 35 was detected.

  As described above, a plurality of claws 17 that engage with the toe 21 of the deformed nail 20 such as a rolled nail and an ingrown nail are provided in the longitudinal direction of the correction plate 16 (the width direction of the deformed nail 20). The correction plate 16 can be bent with a curvature corresponding to the shape of 20, and it is attached to the toe 21 in a bent state, so that the correction tool 15 can be stably attached and curled nails, ingrown nails and the like can be corrected. In addition, the claw 17 formed by the folding part 18 and the folding part 19 has a large deformation stress in the toe direction, which ensures that the corrector 15 is attached to the toe 21 and prevents an unexpected dropout. Even in the deformed nail corrector 35 made from the crushed wire rod 30, by engaging the claw 37 on both ends with the toe 21 of the deformed nail 20, the deformation stress in the toe direction is similarly large, and the attachment to the toe 21 is Thus, the correction tool 35 can be surely prevented from accidental dropping. Thus, since it is easy to put on and remove and does not cause pain to the subject, it is useful as a high-performance deformed nail corrector.

Schematic diagram explaining the shortcomings of the conventional deformed nail corrector that simply bent the edge of the correction plate to make the nail locking part Schematic diagram explaining the function of the hook formed by double folding the tongue protruding from the correction plate The figure explaining the manufacturing process of the correction tool which has several claws in the nail width direction center part A plan view (b) and a front view (c) of the deformed nail with the corrector shown in FIG. 3 inserted with a hook between the tip of the deformed nail (a) and the fingertip. The figure explaining the manufacturing process of the correction tool which arranged the plurality of hooks equally along the nail width direction A plan view (b) and a front view (c) of the deformed nail with the corrector shown in FIG. 5 inserted with a claw between the tip of the normal deformed nail (a) and the fingertip The figure explaining the manufacturing process of the correction tool which provided the several claw in the nail width direction both ends vicinity A plan view (a) and a front view (b) of a deformed nail in which a hook is inserted between a fingertip and a toe and the correction tool of FIG. 7 is attached. Plan view (c) of a state where the corrector (b) made of the crushed wire rod (a) is attached to the deformed nail

Explanation of symbols

1: Correction plate 2: Claw locking part 4: Folding part 5: Bending part 6: Claw
10: Elastic metal piece 11: Tongue piece 15: Deformed nail corrector 16: Correction plate 17: Claw 18: Folding part 19: Bending part
20: Deformed nail 21: Toe
30: Crushing wire 35: Deformed nail corrector 36: Correction part 37: Claw 38: Folding part 39: Bending part

Claims (4)

  A plurality of claws (15) engaged with the toe (21) of the deformed nail (20) and the correction plate (16) or the correction part (36) long in the nail width direction produced by cutting, punching or bending an elastic metal plate 17 and 37), and the claws (17, 37) extend from both ends in the nail width direction of the plurality of tongue pieces (11) or the correction tool (36) protruding from the toe side edge of the correction plate (16) A deformed nail correction tool comprising a double structure of folding of protruding portions, folding portions (18, 38) formed by bending, and folding portions (19, 39).   Protruding from the toe side edge of the correction plate (16) with the elastic strip (10) taken from the cold rolled plate as the material and the longitudinal direction of the elastic strip (10) as the nail width direction The deformed nail corrector according to claim 1, wherein a plurality of tongue pieces (11) are folded and bent to form a claws (17) having a double structure of a folded portion (18) and a folded portion (19).   The deformed nail corrector according to claim 2, wherein the plurality of claws (17) protrude from the toe side edge at equal intervals, near the center or near both ends in the nail width direction of the correction plate (16).   A straightening portion (36) formed of a crushed wire rod (30) in a substantially square shape and a claw (37) formed on both ends of the straightening portion (36). The deformed nail corrector according to claim 1, wherein the deformed nail corrector has a double structure of folding of the protruding portion extending from both ends of the nail width direction, a folded portion (38) formed by folding, and a folded portion (39).

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