Eyelash Curler

Abstract

A resin makeup tool which is not larger than a general metal one, can ensure strength, and can be operated in the same manner as a metal one. A makeup tool (1) having a Young's modulus of 2500 N / mm 2 ~40000N / mm 2 The resin material is formed, and at least the maximum stress generating part is configured to have a section modulus of 5mm 3 ~40mm 3 .

Description

Technical Field

[0001] The present invention relates to a makeup tool and an eyelash curler. Background Art

[0002] Generally, an eyelash curler (eyelash curler, eyelash curler) is a structure using a lever principle and is formed of metal such as stainless steel using two fingers.

[0003] However, in a general metal eyelash curler using the lever principle, a metal rod is twisted to form a ring at the grip, and two metal rods are extended side by side at other parts, so the metal section at the grip is thin and the holding property is poor. In addition, people with metal allergies cannot use it.

[0004] Therefore, in order to prevent metal allergies or make the skin feel soft, the following eyelash curler has been proposed, in which the part that contacts the skin is partially covered with resin from above the metal, such as the gripping part that contacts the fingers or the abutting surface that contacts the eyelids, or a part of the component is partially composed of resin (for example, Patent Document 1, Patent Document 2).

[0005] In addition, as an eyelash curler in which the outer side is not made of metal but the entire outer side is made of resin, there is an eyelash curler having a spring (for example, Patent Document 3).

[0006] <Prior Art Literature>

[0007] <Patent Documents>

[0008] Patent Document 1: Japanese Utility Model Application Publication No. Showa 59-40002

[0009] Patent Document 2: Japanese Patent Application Publication No. 2007-68695

[0010] Patent Document 3: Japanese Patent Application Publication No. 2004-57581 Summary of the invention

[0011] <Problems to be Solved by the Invention>

[0012] However, if a resin portion is attached to a portion of a metal eyelash curler or a portion of the metal eyelash curler is replaced with resin as in Patent Documents 1 or 2, the number of manufacturing steps for assembly increases compared to a metal eyelash curler alone, and productivity decreases accordingly.

[0013] In addition, if a resin eyelash curler is manufactured in the same shape as a general metal eyelash curler, the strength for clamping is insufficient. Therefore, the eyelash curler shown in Patent Document 3, whose entire outer side is made of resin, has a spring for clamping, has a complex and large structure, and is different in appearance and operation method from a general metal eyelash curler using a lever.

[0014] Therefore, in view of the above circumstances, an object of the present invention is to provide a resin makeup tool which is not larger in size than a general metal one, can ensure strength, and can be handled in the same manner as a metal one.

[0015] <Methods used to solve the problem>

[0016] In order to solve the above problems, in one embodiment of the present invention, a makeup tool is provided, which has a Young's modulus of 2500N / mm 2 ~40000N / mm 2 The resin material is formed, and at least the maximum stress generating part is configured to have a section modulus of 5mm 3 ~40mm 3 .

[0017] <Effects of the Invention>

[0018] According to one embodiment, the resin makeup tool is not larger than a general metal one, and strength is ensured, and the same operations as metal ones can be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall view of an eyelash curler according to a first embodiment of the present invention.

[0020] Figure 2 yes Figure 1 Exploded view of an eyelash curler.

[0021] Figure 3 This is a diagram of a metal eyelash curler of a comparative example.

[0022] Figure 4 This is a diagram for explaining the fulcrum and the load point when the eyelash curler is approximated as an outwardly extended simply supported beam structure.

[0023] Figure 5 An example of the cross-sectional shape of a beam constituting a fixing member and a force point member as a force receiving portion, and an explanatory diagram of the width (depth) (x) and height (y) of the cross section of the example.

[0024] Figure 6 The result is obtained by measuring the curling pressure applied by a person when using a metal eyelash curler using a hand-held measuring instrument.

[0025] Figure 7 This is a judgment table comparing an eyelash curler made of SUS and an eyelash curler made of 6PA+GF55% resin.

[0026] Figure 8This is a determination table obtained by changing the section modulus by changing the width x and height y of the beam using 6PA+GF55% resin as the material.

[0027] Fig. 9 This is a table showing the judgment results of each section coefficient for each material.

[0028] Fig.10 This is a diagram showing the recommended range of the material of the present invention defined by the section modulus and the Young's modulus.

[0029] Fig.11 This is a diagram showing the section modulus of each part of an example of the resin eyelash curler according to the first embodiment.

[0030] Fig.12 This is a diagram showing the analysis conditions for the eyelash curler 1 made of 6PA+GF55% resin.

[0031] Fig.13 It means that it is composed of 6PA+GF55% resin. Fig.11 Graph showing the distribution of stress when the eyelash curler 1 is analyzed under the second analysis condition.

[0032] Fig.14 It means that it is composed of 6PA+GF55% resin. Fig.11 Graph showing the distribution of the amount of deformation when the eyelash curler 1 is analyzed under the second analysis condition.

[0033] Fig.15 It is a diagram showing the section modulus of each part of the metal eyelash curler 9 according to the comparative example.

[0034] Fig.16 It shows a metal eyelash curler 9 and a 6PA+GF55% resin. Fig.11 The table shows the curling pressure when the hand-held part of the eyelash curler 1 is in contact.

[0035] Fig.17 The diagram shows a manual measuring mechanism for measuring the gripping force and the clamping pressure by applying a gradually changing load through the device, and the load position of the first measuring machine.

[0036] Fig.18 It means in Fig.17 The test conditions shown below are for the 6PA+GF55% resin. Fig.11 Graph comparing measurement results of the gripping force of the eyelash curler 1 and the metal eyelash curler 9.

[0037] Fig.19 It means in Fig.17 The test conditions shown below are for the 6PA+GF55% resin. Fig.11Graph comparing measurement results of curling pressure of eyelash curler 1 and metal eyelash curler 9.

[0038] Fig. 20 The test results were obtained by using a hand-held measuring instrument and using a resin composed of 6PA + GF55%. Fig.11 The eyelash curler 1 is the measurement result of the eyelash curling pressure applied by a person.

[0039] Fig.21 This is the measurement result obtained by measuring the eyelash curling pressure applied by a person when using the metal eyelash curler 9 using the sensor sheet.

[0040] Fig. 22 The sensor sheet is used to measure the 6PA+GF65% resin. Fig.11 The eyelash curler 1 is the measurement result of the eyelash curling pressure applied by a person.

[0041] Fig.23 It is a structural diagram of an eyelash curler 2 according to a second embodiment of the present invention.

[0042] Fig.24 yes Fig.23 Exploded view of the Eyelash Curler 2.

[0043] Fig.25 It is a figure which shows the dimension example of the eyelash curler 2 which concerns on 2nd Embodiment.

[0044] Fig.26 The diagram shows a measuring mechanism based on a sensor sheet for measuring a gripping force and a clamping pressure by applying a gradually changing load through a device, and a load position of a second measuring machine.

[0045] Fig. 27 is Fig.26 The measurement results of the gripping force (load) applied to the load point of the handheld part of four types of eyelash curlers, namely, metal, the first embodiment composed of 6PA+GF55% resin, the second embodiment composed of 6PA+GF55% resin, and the second embodiment composed of PAMXD6+GF50% resin, were measured under the measurement environment shown.

[0046] Fig.28 is Fig.26 The measurement results of the curling pressure of four types of eyelash curlers, namely, metal, the first embodiment composed of 6PA+GF55% resin, the second embodiment composed of 6PA+GF55% resin, and the second embodiment composed of PAMXD6+GF50% resin, were measured under the measurement environment shown.

[0047] Fig.29 It is a conversion table of measurement conditions.

[0048] Fig.30This is a diagram showing an example of a resin topical eyelash curler according to an example of the present invention.

[0049] Fig.31 This is a view showing another example of a resin topical eyelash curler according to the present invention.

[0050] Fig.32 It means having Fig.10 Graph showing an example of the section modulus and Young's modulus of resin-made cosmetic tweezers.

[0051] Fig.33 It means having Fig.10 Graph showing an example of the section modulus and Young's modulus of a pair of resin beauty scissors. DETAILED DESCRIPTION

[0052] Hereinafter, embodiments for implementing the present invention will be described with reference to the accompanying drawings. In the following, the same components may be denoted by the same reference numerals in each of the drawings, and repeated descriptions may be omitted.

[0053] The present invention relates to a resin makeup tool, such as an eyelash curler (an eyelash curler for the entire eyelash area and an eyelash curler for partial eyelashes), tweezers, beauty scissors, etc.

[0054] <First embodiment>

[0055] Figure 1 This is an overall view of an eyelash curler according to a first embodiment of the present invention as an example of a makeup tool. Figure 2 yes Figure 1 Exploded view of an eyelash curler.

[0056] The eyelash curler 1 of the present embodiment has a structure similar to that of a general metal eyelash curler, and is integrally formed with the resin described below.

[0057] The eyelash curler 1 comprises a fixing member 10 , a force point member 20 and an action member 30 .

[0058] The fixing member (supporting portion) 10 includes an upper side pressing portion 11, support portions 12A and 12B, branch support portions 13A and 13B, an arm 14, and a grip portion 16. The arm 14 has an engagement hole 15 formed therein.

[0059] The upper side pressing portion (contact member, upper clip, frame) 11 is a portion that contacts the upper surface of the upper eyelashes when the upper eyelashes are curled.

[0060] The support parts 12A and 12B are integrally connected from both ends in the width direction of the upper pressurizing part 11, and extend in the up-down direction. The upper ends of the branch support parts 13A and 13B are connected to the lower ends of the support parts 12A and 12B, the intervals on the lower sides are narrowed in a V-shape, and the lower ends are connected to the arm 14. The support parts 12A and 12B and the branch support parts 13A and 13B function as support parts.

[0061] The arm portion (first arm portion) 14 is an extending portion that connects the upper pressurizing portion 11 and the grip portion 16. In this example, the arm 14 extends in the same direction as the inner portion of the grip portion 16.

[0062] The hand-held portion (handle, finger ring, handle, grip) 16 is annular in shape with a finger hole for inserting a finger. When the user curls the eyelashes by himself, the user's thumb is inserted into the finger hole of the hand-held portion 16. Alternatively, when a makeup artist such as a makeup stylist curls the eyelashes, the makeup artist's index finger, middle finger, or ring finger is inserted into the hand-held portion 16. The inner peripheral portion of the hand-held portion serves as a finger hook portion.

[0063] In the present invention, the fixing member 10 is integrally formed with a grip portion 16, an arm 14 extending in the up-down direction, a pair of pillars 12A, 13A, 12B, 13B branching from the arm 14 and supporting both ends of the upper pressurizing portion 11, and the upper pressurizing portion 11.

[0064] Here, if Figure 1 As shown, the arm 14 extends from the branch point to the handle 16 , and the width (depth) and height (thickness) of the handle 16 are the same as the width and height of the arm 14 .

[0065] In addition, small holes 151A and 151B penetrating in the width direction are formed on the side surfaces on both sides of the engagement hole portion 15 formed in the arm 14 .

[0066] The force point component 20 includes arm portions 21, 24 and a grip portion 25. The arm 21 on the front end side is formed with a first engagement hole (front end engagement hole) 22 and a second engagement hole 23. The extension portions (arm portions, second arms) 21, 24 include a front end side arm 21 and a rear end side arm 24, the front end side arm 21 extending from the front end portion beyond the connecting portion, and the rear end side arm 24 extending in a direction different from that of the front end side arm and extending in the same direction as the inner portion of the grip portion 25.

[0067] The front end side arm 21 of the force point component 20 is inserted into the engaging hole portion 15 of the fixing component 10 from the end portion of the front end side opposite to the hand-holding portion 25, and is locked by the pin shaft PS2 in a manner that the second engaging hole 23 and the small holes 151A, 151B on the side of the engaging hole portion 15 are aligned with each other, thereby penetrating the second engaging hole 23 and the small holes 151A, 151B.

[0068] Through this engagement, the power point member 20 can rotate relative to the fixing member 10 about the pin shaft PS2 as the rotation axis.

[0069] When the force point component 20 is rotated relative to the fixed component 10, Figure 2 The arm 14 of the fixing member 10 and the arm portions 21 and 24 of the force point member 20 shown in the figure are the stress generating range. The stress generating range includes the maximum stress generating portion where the stress is the largest. It should be noted that the stress generating range refers to the portion where a large stress is generated, and stress is also generated in other portions. For details about the maximum stress generating portion, see Fig.13 Let’s describe them together below.

[0070] The hand-held portion (handle, finger ring, handle, grip) 25 is formed in a ring shape with a finger hole for finger insertion. When the user curls the eyelashes by himself, the user's index finger, middle finger or ring finger is inserted into the finger hole of the hand-held portion 25. Alternatively, when the eyelashes are curled by a makeup artist, the makeup artist's thumb is inserted into the hand-held portion 25. The inner periphery of the finger hole of the hand-held portion 25 and the portion extending from the arm portion 24 in a substantially linear shape become the finger hook portion, and become the load point C when actually moving in a pinching manner (refer to Figure 4 ).

[0071] The force point component 20 is integrally formed with a grip portion 25 and an extended arm portion 24 . At the force point component 20 , the arm portions 21 and 24 are formed from one piece and have the same thickness as the grip portion 25 .

[0072] The acting member (interlocking portion, lifting portion) 30 includes a lower side pressing portion 31 , link portions 32A and 32B, and a connecting portion 33 .

[0073] When curling your upper eyelashes, Figure 1 In the state shown, the eyelash curler 1 is grasped, and the lower pressing part (lower abutting member, clamping piece) 31 pushes up from the lower side the lower surface of the eyelashes clamped between the upper pressing part 11, so that the upper eyelashes are curled upward.

[0074] In addition, when curling the lower eyelashes, Figure 1 The eyelash curler 1 is held upside down, and the lower pressing part 31 pushes down the upper surface of the eyelashes clamped between the lower pressing part 31 and the upper pressing part 11 from the upper side, so that the lower eyelashes are curled downward.

[0075] The link parts (lifting columns) 32A and 32B have upper ends connected to the lower pressurizing part, are inclined in a substantially V-shape, and are connected to the connecting part 33 at lower ends.

[0076] The connection portion 33 has a three-dimensional U-shaped shape. Small holes 331A and 331B penetrating in the width direction are formed on the side surfaces forming both sides of the connection portion 33 .

[0077] The front end of the front end side arm 21 of the force point component 20 is inserted into the inner side of the U-shape of the connecting part 33 of the action component 30, and is locked by the pin shaft PS1 in a manner that the front end side locking hole 22 and the small holes 331A, 332B on the side of the connecting part 33 are consistent with each other.

[0078] By this engagement, when the power point member 20 rotates about the pin PS1 as the rotation axis, the action member 30 can be moved up and down in conjunction therewith.

[0079] In addition, partially missing substantially circular (hook-shaped) engagement hooks (engagement portions) 311A ​​and 311B are provided at both left and right ends of the lower pressure portion 31. The engagement hooks 311A ​​and 311B can slide along the pillars 12A and 12B of the fixing member 10 by engaging with a pair of pillars 12A and 12B.

[0080] It should be noted that when in use, the clamp rubber R (refer to Fig.17 (a)) A groove is inserted and provided in the upper surface of the lower pressurizing portion 31.

[0081] Through this structure, if the handle 25 on one end side is moved in a manner close to the handle 16, the force point component 20 rotates by using the connecting portion between the second engaging hole 23 and the small holes 151A and 151B, that is, the pin shaft PS2 as a fulcrum (fulcrum B), so that the front end side engaging hole 22 connected to the connecting portion 33 of the action component 30 on the other end side moves up and down in the direction opposite to the movement of the handle 25, and the action component 30 is pushed up together with the pin shaft PS1.

[0082] Thus, by moving the grip 25 , the action member 30 moves up and down according to the front end engagement hole 22 , and the engagement hooks 311A ​​and 311B slide along the pillars 12A and 12B of the fixing member 10 while moving the lower pressurizing portion 31 up and down.

[0083] In addition, the force point member 20 rotates with a part of the fixing member 10 as a fulcrum, thereby moving the acting member 30 up and down.

[0084] The lower pressurizing portion 31 of the action member 30 approaches the upper pressurizing portion 11 of the fixing member 10 and applies pressure (curls) to the eyelashes between the elastic member (clamp rubber R) and the upper pressurizing portion 11, thereby curling the eyelashes.

[0085] In the eyelash curler 1, the fixing member 10, the power point member 20, and the action member 30 are integrally formed of resin. Details of the constituent resins will be described below.

[0086] It should be noted that in this embodiment, at the connecting portion between the force point component 20 and the action component 30, and at the connecting portion between the fixed component 10 and the force point component 20, the connecting shaft, i.e., the pin shaft (PS1, PS2) for connecting the components is fixed in a rotatable manner, and the material constituting the pin shaft PS1, PS1 can be any material such as resin or metal.

[0087] It should be noted that, if the pins PS1 and PS2 are formed of resin, all components constituting the eyelash curler 1 are made of resin, and it is possible to achieve complete metal-free operation.

[0088] <Comparative Example>

[0089] Figure 3 It is a figure which shows the metal eyelash curler 9 of a comparative example. Figure 3 The illustrated eyelash curler 9 is an example of a general metal eyelash curler.

[0090] Regarding the metal eyelash curler 9, the following Figure 1 The differences in the structure of the eyelash curler 1 of the present invention will be described below.

[0091] exist Figure 3 In the metal eyelash curler 9 shown, the fixing part 70 is formed by forming the upper pressure part (metal frame) 11 and the thinner metal rod, and then bonding them together. The force point part 80 is formed by changing a thinner metal rod. The action part 90 is formed by forming the lower pressure part (metal frame) 91 and the frame of the thinner metal rod, and then bonding them together.

[0092] In detail, in the fixing member 70, the metal rod is processed so that the handle 76 is formed by twisting the metal rod into a ring shape at the lower end, and a longitudinal cut hole is pre-formed in the opposite part at the two ends of the upper side of the metal rod corresponding to the pillars 72A and 72B. At this time, the lower end is twisted into a ring shape, and two thin metal rods (741, 742) are arranged in a contact or close state at the arm 74 which is an extension from the pillars 72A, 73A, 72B, 73B to the handle 76. And, by inserting a metal frame into the cut hole on the inner side surface of the front end of the parallel pillars 72A and 72B as the metal rods and welding them, the upper side pressure part 71 is connected to the parallel pillars 72A and 72B.

[0093] In the force point component 80, the lower end is twisted into a ring shape to form a handle portion 85, and at the arm portions 81 and 84 that serve as extensions from the handle portion 85 to the front end, two thinner metal rods (811, 812) and (841, 842) are arranged in a contacting state.

[0094] In the action member 90 , the link parts 92A and 92B are connected to the lower pressurizing part 91 by welding the end of a metal rod formed by bending a metal into a substantially V shape to the lower pressurizing part 91 as a metal frame.

[0095] In addition, in the action member 90, when the apex of the substantially V-shaped link parts 92A and 92B is connected to the force point member 80, a relatively thin metal rod is inserted into the front end engagement hole 82 of the force point member 80 and bent to form the shape of the link parts 92A and 92B, and then the upper ends of the link parts 92A and 92B are welded to the lower side pressurizing part 91. In this way, the shaping of the action member 90 and the connection of the action member 90 and the force point member 80 are performed simultaneously, so that after manufacturing, the action member 90 and the force point member 80 will not be separated.

[0096] In this structure, the handles 76 and 85 that form a ring in the fixing part 70 and the force point part 80 have a thickness equivalent to that of one arm relative to the arms 74 and (81 and 84) that are combined into two arms. Therefore, at the handles 76 and 85, the cross-section of the cylinder is thinner and the retention is poorer.

[0097] In contrast, Figure 1 The eyelash curler 1 of the present invention shown is made of resin, and therefore, in the fixing member 10 and the power point member 20, the arm 14 (21, 24) is composed of one piece and has the same thickness as the handle.

[0098] In the structure of the present invention, by making the cross-sectional shape of the gripping parts 16 and 25 in the fixing part 10 and the force point part 20 the same thickness as the arm parts 14, 21, and 24, the gripping parts 16 and 25 can be thickened, thereby improving the retention, and even if force is applied, the fingers will not be embedded and there will be no pain, so that the force can be fully applied.

[0099] Here, the present inventors studied and conducted experiments on the manner in which force is applied in a metal eyelash curler in order to verify the strength of a resin eyelash curler.

[0100] <Study of shape (approximation of an extended simply supported beam)>

[0101] As a premise, since the eyelash curler has a complicated shape, the shape calculation is performed by replacing it with a simple shape.

[0102] Figure 4 is a diagram that roughly illustrates how forces are applied in an eyelash curler. Figure 4 , the upper figure is a figure showing the positions of the fulcrum and the load point in the eyelash curler, and the lower figure is a figure in which the fulcrum and the load point of the eyelash curler are approximated as an outwardly extended simply supported beam (single-sided concentrated load).

[0103] Since it is considered that at the moment of clamping the eyelashes, the rotation of the eyelash curler, that is, the power point member 20, is restricted and hardly rotates or moves, the connecting part of the eyelash curler can be replaced by the fulcrums A and B.

[0104] The load point C is set to the grip portion 25 of the force point member 20, and the load P is set to the force (gripping force) applied from the fingers to the eyelash curler.

[0105] Here, the fixing member 10 and the force point member 20 function as a "beam" of an outwardly extended simply supported beam, and when the load or action is considered, as shown in FIG. Figure 5 As shown, the width (depth) (x) and height (thickness) (y) of the cross section of the beam including the force-bearing parts, namely the fixing component 10 and the force point component 20 are considered.

[0106] Figure 5 This is an explanatory diagram of the width (depth) (x) and height (y) of a cross section of an example of a beam constituting a force-bearing portion, namely a fixing member and a force point member. Figure 5 The structure of the beam having a quadrilateral cross section shown is an example, and the cross-sectional shapes of the fixing member 10 and the force point member 20 are not limited to Figure 5 The rectangle shown may also be a circle, an ellipse, a semicircle or other shapes.

[0107] In addition, Figure 4 In the formula of "Extended Simply Supported Beam (One-Sided Concentrated Load)" shown in FIG. 1 , the bending moment MB generated around the support point B is the largest.

[0108] Therefore, the present inventors conducted a simulation based on a conventional eyelash curler made of metal to study the situation where an external force (load P) is applied to an eyelash curler as an object (see Figure 6 to Figure 14 )Selection of resin.

[0109] [Investigation of gripping force and clamping pressure]

[0110] ((Experimental Example 1))

[0111] In order to ensure the strength of the resin eyelash curler, as a prerequisite, a Figure 3 An experiment was conducted to examine the curling pressure (clamp pressure) when using a metal eyelash curler 9 of the comparative example shown.

[0112] In this experiment, several subjects were asked to use Figure 3 The eyelash curler 9 shown was used in the same manner as in normal use, and the curling pressure at this time was measured. As the metal eyelash curler, a general stainless steel eyelash curler was used.

[0113] In this experiment, 6 subjects were used as subjects to measure the pressure when using the metal eyelash curler, that is, the curling pressure. At this time, a pressure sensor R (see Fig.14 ) is a hand-made measuring mechanism to measure the pressure of clamping the eyelashes, that is, the curling pressure. It should be noted that the curling pressure is measured using a homemade pressure sensor, so it is an indicator and no unit is set.

[0114] exist Figure 6 2 shows the measurement results of the eyelash curling pressure when using a metal eyelash curler 9 using a manual measuring mechanism. Figure 6 In the graphs (a) to (f), the vertical axis represents the clamping pressure and the horizontal axis represents the time (unit: second). The six test subjects are men and women in their 20s to 50s, and are designated as Person A, Person B, Person C, Person D, Person E, and Person F.

[0115] Here, if Figure 6 As shown, the maximum values ​​of the entrainment pressure are 328.26, 498.34, 380.67, 318.58, 238.9, and 257.33, respectively.

[0116] Therefore, the maximum value of the curling pressure of the resin eyelash curler described below was set to 500 as the target value with a slight margin compared to the maximum value 498.34 in the above experiment, and the experiment was conducted.

[0117] (Pressure corresponding to target value)

[0118] In addition, as described above, the pressure applied to the clamp rubber R by actual use by the test subject can be measured as the clamping pressure, and the numerical value is studied in order to convert the clamping pressure generated by the force applied to the handle 16, 25, that is, the force generated by human power, into a pressure (N) that can be applied to the handle as a load (external force) by machinery, etc.

[0119] First, use a testing machine and a manual pressure sensor (refer to Fig.17 (a) The load P of the metal eyelash curler 1 when the clamping pressure is 500 is measured and the derived value is 10N for each hand grip. Fig.19 The load applied to the handheld part, i.e. the gripping force, is 17N to 21N (see Fig.18 Therefore, the approximately median value of 20 N is divided into half each between the grips 16 and 25 to obtain 10 N.

[0120] In addition, using P=10N, the bending moment MB generated around the support point B in the above-mentioned "extension simply supported beam (one-side concentrated load)" is expressed by the following formula.

[0121] MB=P(load)×b(length)

[0122] This time, in the following structural example, according to

[0123] a=12mm

[0124] b=50mm,

[0125] It becomes MB=P×b=10(N)×50=500N·mm.

[0126] Taking into account the load of 10 N applied to the grips as a load value at which a curling effect can be expected, the following material selection and the following durability test were performed.

[0127] <Material selection>

[0128] ((Experimental Example 2))

[0129] The inventors varied the width (x) and height (y) of the beams serving as the fixing member 10 and the force point member 20 according to the material, and conducted a comprehensive evaluation based on the mechanical strength evaluation and the formability evaluation. At this time, the load of 10N calculated above was applied to both hand grips as an external force (gripping force).

[0130] Figure 7 The following is a table comparing eyelash curlers made of SUS and 6PA+GF55% resin.

[0131] The metal eyelash curler 9 is usually made of stainless steel (SUS304) in many cases. Figure 7 The 6PA+GF55% resin eyelash curler 1 is formed by imitating a general stainless steel eyelash curler.

[0132] Here, Young's modulus (N / mm 2 ) represents the proportionality constant between strain and stress in the coaxial direction and the longitudinal elastic modulus. Section coefficient Z (mm 3 ) is an indicator of the cross-sectional performance of a component, specifically, its strength and resistance to bending.

[0133] Figure 7 , Figure 8 The judgment under each condition in is made according to the following criteria.

[0134] Mechanical strength evaluation: When the stress value generated in the material during use is less than the strength of the material itself, the rigidity is evaluated based on the applied force.

[0135] Formability determination: Determine whether there are no defects during forming.

[0136] Comprehensive judgment: Comprehensive judgment of mechanical strength and formability.

[0137] It should be noted that these determinations were made based on simulations using CAE (Computer Aided Engineering) calculations, excluding the metal eyelash curler 1 and the 6PA+GF55% resin eyelash curler 1 having a section modulus of 4.5.

[0138] like Figure 6 As shown in the table, when a load of 10N is applied to each of the handles 16 and 25 of the general stainless steel (SUS304) metal eyelash curler 9, even if the width x or height y of the beam including the fixing part 10 and the force point part 20 is as small as 2.75mm, the tensile strength (strength) is large enough and the deflection is small, so all the judgments are passed.

[0139] In contrast, in a resin eyelash curler such as PA (polyamide) + GF (glass fiber) 55, where the width x and height y of the beams 10 and 20 are 3 mm, which is close to that of metal, the deflection amount becomes larger, so all judgments become × (NG).

[0140] In addition, the inventors conducted a study on the case where the width and height of the beam (fixing member 10, force point member 20) were gradually changed for PA+GF55% resin. Figure 7 The same judgment on the simulation.

[0141] Figure 8 This is a determination table obtained by changing the section modulus by changing the width x and height y of the beam using 6PA+GF55% resin as the material. Figure 8 In FIG. 1 , the results of evaluations performed by changing the beam dimensions (width, height) using eyelashes made of a resin of PA+GF55% are shown.

[0142] like Figure 8 As shown, even in the case of using PA+GF55% resin, by increasing the width x or the height y of the beams 10 and 20, the judgment can be made "○" (pass).

[0143] According to the calculation above Figure 8 The results obtained consider the moldability during injection molding depending on the wall thickness and the operability when using an eyelash curler. It is believed that the Young's modulus is 2500 to 40000 (N / mm 2 ) is preferably within the range of 5 to 40 (mm 3 ). The reasons are explained below.

[0144] Fig. 9 This is the evaluation result of using eyelash curlers made of various materials and using them. Fig.10 This is a diagram showing the recommended range of the material of the present invention defined by the section modulus and the Young's modulus.

[0145] In detail, Fig. 9 The material with a predetermined cross-sectional area and cross-sectional modulus is SUS304 (stainless steel), polyamide (PA), fiber-reinforced resin obtained by adding 55% glass fiber (GF) to PA, nylon 6 / 10, polyetheretherketone (PEEK), polybutylene terephthalate (PBT), GF polyamide MXD6, and CF polyamide MXD6. 3 ) size and use them.

[0146] It should be noted that polyamide MXD6 is a crystalline thermoplastic polymer obtained from meta-xylylenediamine (MXDA) and adipic acid, and the glass-reinforced polyamide MXD (PAMXD6+GF50) used here uses commercially available Reny (registered trademark) 1022H obtained by blending 50% of glass fiber (GF) in polyamide MXD6. The carbon-reinforced polyamide MXD6 uses commercially available Reny C408 obtained by blending 40% of carbon fiber (CF) in polyamide MXD6.

[0147] It should be noted that for "PA+GF55%" as a fiber-reinforced resin, the strength evaluation is performed by changing the cross-sectional area to change the cross-sectional modulus. By increasing the cross-sectional area, the cross-sectional modulus is increased. Fig.10 The position on the curve graph moves upward, and the evaluation becomes better even for the same material. For example, in the case of a material of "PA+GF55%" and a section modulus of 4.5 (mm 3 ) does not meet the strength requirement and is comprehensively judged as "×". 3 ) and the section coefficient is 36(mm 3 ), the strength is satisfied and the comprehensive judgment becomes "0".

[0148] In addition, for PBT, even if the cross-sectional area is increased in the same manner as "PA+GF55%" (even if the cross-sectional modulus is set to 32 (mm 3 )), and also does not meet the strength evaluation.

[0149] exist Fig.10 The area surrounded by the four sides is the recommended range set by simulation. The recommended range is 2500 to 40000 (N / mm 2 ) and the profile coefficient is set to 5 to 40 (mm 3 ).

[0150] It should be noted that within this range, the greater the Young's modulus of the resin, the smaller the section modulus. That is, even if the Young's modulus of the resin is greater and the thickness is reduced in a manner closer to that of metal, strength can be ensured. Considering the operability of the user, the section modulus is preferably 30 (mm 3 ) or less, and the section coefficient is more preferably 20 (mm 3 )the following.

[0151] On the contrary, even for a resin with a small Young's modulus and a relatively brittle structure, if the section modulus is increased, the strength may be satisfied by simulation. However, considering the operability, the upper limit of the section modulus is set to 40 (mm2) so as not to increase the cross-sectional area excessively. 3 ).

[0152] Therefore, in order to increase the strength of the material containing the resin without increasing the cross-sectional area, Fig.10 The material constituting the eyelash curler is preferably formed of a fiber-reinforced resin obtained by mixing glass fiber (GF) in a resin. For example, if glass fiber is added to a resin having the same section modulus, the Young's modulus increases. Fig.10 The position on the graph of moves to the right. In addition, CF (carbon fiber) may be mixed in addition to or instead of glass fiber. For example, the fiber-reinforced resin is preferably blended with 30% by mass or more and 65% by mass of glass fiber (GF) or carbon fiber (CF).

[0153] By adding GF or CF, the rigidity of the resin material itself (such as PA) can be strengthened against deformation or fracture. The general value of Young's modulus is PA: 1200-2900Mpa, etc. By adding glass fiber, the Young's modulus can be increased (for example, to 4725Mpa). Therefore, the pressure of clamping eyelashes close to that of metal can be obtained.

[0154] The resin mixed with the glass fiber is not particularly limited as long as it is a resin that can be formulated into the fiber. For example, examples of the resin include polyamide (PA) (including various nylons), polyetheretherketone (PEEK), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyamide MXD6, etc.

[0155] It should be noted that as Fig. 9 An example of the Young's modulus of the resin not shown in the figure, the Young's modulus of PEEK is about 3900MPa, the Young's modulus of glass fiber reinforced PEEK is about 6300MPa, the Young's modulus of PET is about 2800-4200MPa, the Young's modulus of glass fiber reinforced PET is about 9000-9900MPa, the Young's modulus of PETG and glass reinforced PETG is slightly larger than that of PET and glass reinforced PET, PPS is about 3300MPa, and glass fiber reinforced PPS is about 3900MPa. It should be noted that the Young's modulus of glass fiber reinforced resin varies according to the mixing ratio of glass fiber.

[0156] It should be noted that, among the resins with relatively high strength alone, for example, a single body of special polyamide MXD6 has a strength of 5000 (N / mm2) even without being reinforced with glass fiber or carbon. 2 ) or more, as long as the strength can be compensated by simulation, the section modulus is 5 to 40 (mm 3 ) can be used as the material of the eyelash curler of the present invention.

[0157] In addition, even if it is not a special resin, as long as the Young's modulus of the resin is 2500 (N / mm 2 ) or above, even if it is nylon 6 / 10 or PA, PEEK, PET, PETG, PPS, etc., it is possible to form an eyelash curler with a single body without mixing glass fiber by setting the section modulus to a larger value within the above recommended range. In this case, it is estimated that among these resin monomers other than nylon 6 / 10, the Young's modulus is 2500 (N / mm 2 )~5000(N / mm 2 ), therefore, if the section modulus is set slightly off the lower end of the above-mentioned recommended range, for example, 10 (mm 3) or more, even if it is a resin monomer, it can achieve a specific strength and can be used as the material of the eyelash curler of the present invention.

[0158] Here, regarding the stress generation range in the fixed component 10 and the force point component 20 that are directly subjected to the force of the user's fingers, it is preferred that the Young's modulus and the section modulus satisfy the above-mentioned recommended range. Regarding the section of the connecting rod parts 32A and 32B of the action component 30 that is indirectly subjected to the force and performs the lifting action, if the Young's modulus satisfies the above-mentioned recommended range, the section modulus may be smaller than the recommended range.

[0159] It should be noted that, although PA+GF55% was studied here, the strength can be further increased by using PA+GF65% in which the content of glass fiber is increased in the reinforcing resin (glass fiber) constituting the eyelash curler.

[0160] Furthermore, the present inventors analyzed the stress and deformation amount of the eyelash curler of the first embodiment having a specific size using an example of a material included in the numerical range of the selected material.

[0161] <First embodiment and analysis>

[0162] ((Experimental Example 3))

[0163] The inventors used CAE (Computer Aided Engineering) to form a size that can ensure strength. Fig.11 The eyelash curler of the first embodiment with the dimensions shown was analyzed and measured.

[0164] Fig.11 This is a diagram showing the section modulus of each part in an example of the resin eyelash curler 1 according to the first embodiment.

[0165] The eyelash curler used in the following analysis or experiment is 1 Fig.11 The following dimensions are used to form the steel sheet. These dimensions correspond to the dimensions calculated by CAE as the dimensions that can ensure strength.

[0166] In this configuration, the following section coefficients are set.

[0167] The section modulus Z of the fixing member 10 is 14.98 mm. 3

[0168] The section modulus Z of the grip portion of the force point member 20 is 14.98 mm. 3

[0169] Section modulus Z of the front end side of the force point member 20 = 10.92 mm 3

[0170] The section modulus Z of the supporting part of the action component C = 1.57 mm 3

[0171] It should be noted that if the portion sandwiched between the fulcrum A and the fulcrum B in the power point component 20 is too thick, there is a possibility that the operability will be reduced when the front end of the front side arm 21 moves when the power point component rotates. Figure 4 As shown, the displacement amount on the grip portion 25 side is large, so it is desirable that the rear end side is thicker. Therefore, as described above, the thickness of the front end side arm 21 of the power point member 20 is set to two levels.

[0172] It should be noted that the above-mentioned section coefficient is calculated based on the premise of a rectangle, but the section may also be a circle, a hexagon, or the like.

[0173] Fig.12 This is a diagram showing the analysis conditions for the eyelash curler 1 made of 6PA+GF55% resin.

[0174] like Fig.12 As shown, both ends of the upper pressing portion 11 as the upper end of the fixing member 10 are fixed to the XYZ axis, and the intersection of the fixing member 10 and the power point member 20, that is, the hinge portion (fulcrum B) is fixed in a frictionless state.

[0175] As a load, a force of 25N+25N is applied to the grips 16 and 25. The load of 25N applied to the grips 16 and 25 is equivalent to a gripping force of 50N. It should be noted that the load of 25N+25N applied to the grips 16 and 25 in this experiment is a larger load than that in normal use.

[0176] Using these analytical conditions, the inventors Fig.11 CAE analysis was performed on the stress and deformation in the eyelash curler 1.

[0177] Fig.13 It means that it is composed of 6PA+GF55% resin. Fig.11 Graph showing the distribution of stress when the eyelash curler 1 is analyzed under the second analysis condition.

[0178] like Fig.13 As shown, regarding stress, Figure 4 The maximum stress is generated near the connecting part of the fixed part 10 and the force point part 20, that is, the fulcrum B. In this structure, the height (y) of the force point part 20 changes across the fulcrum B, so a large stress is generated at the front end side where the height is shortened around the fulcrum B. It should be noted that the maximum stress generation part in the fixed part 10 and the force point part 20 is at Figure 2The stress generation range shown is within the range of the arm 14 and the arm portions 21 and 24 .

[0179] exist Fig.13 , an example is shown in which a load greater than that in normal use is applied and a stress of 163.6 MPa is applied to the vicinity of the fulcrum B of the front end side arm 21 of the power point component 20. The same is true for portions that are susceptible to stress in normal use.

[0180] Fig.14 This is a diagram showing the distribution of the amount of deformation when the eyelash curler 1 made of 6PA+GF55% resin is analyzed under the first analysis condition.

[0181] In this experiment, the amount of movement of the handheld part, i.e. the displacement, is not specified, but Fig.14 As can be seen from the deformation amount shown, even if a mechanical pressure of 25 N is applied to each of the handles 16 and 25 on both sides, the inner sides of the handles 16 and 25 do not contact each other.

[0182] ((Experimental Example 4))

[0183] In addition, the inventors conducted Figure 3 The metal eyelash curler 9 shown in Fig.11 The resin eyelash curler 1 shown was pressed in until the grips 16 and 26 came into contact, and the curling pressure was measured in a comparative experiment.

[0184] Therefore, the size of the metal eyelash curler 9 for comparison is shown in FIG. Fig.15 middle. Fig.15 Yes means Figure 3 FIG. 1 is a diagram showing an example of the dimensions of a metal eyelash curler 9 according to a comparative example.

[0185] The section modulus of each part is as follows.

[0186] The section coefficient Z of the fixing part 10 and the force point part 20 is 2 mm. 3

[0187] Section coefficient Z of the acting part 30 = 0.33 mm 3

[0188] Fig.16 It represents the measurement result of the clamping pressure when the grip parts start to contact each other. Fig.17 As shown in (a), a pressure sensor 210 is provided just below the clamp rubber R to measure the clamping pressure.

[0189] The displacement amount (movement amount) before the opposing surfaces of the hand grips 16 and 25 (76 and 85) start to contact each other varies according to the size of each eyelash curler. It should be noted that, when comparing the resin eyelash curler 1 with the metal eyelash curler 9, since the displacement amount is equivalent to the movement amount of the portion of the finger contacting the inner peripheral side of the finger hole of the hand grips 16 and 25, if the beam size becomes thicker, the displacement amount increases slightly accordingly.

[0190] It should be noted that the metal eyelash curler 9 of the comparative example is made of SUS304 stainless steel in the subsequent experiments. Fig.15 In addition, in this experiment, the Fig.18 , Fig.19 of Fig.11 The eyelash curler 1 of size is made of 6PA+GF55% resin.

[0191] like Fig.16 As shown, the hand-held parts of the metal eyelash curler 9 begin to contact each other when the displacement is 23mm, and the clamping pressure at this time is 750. Fig.11 The hand-held parts of the eyelash curler 1 begin to contact each other when the displacement is 23 mm, and the clamping pressure at this time is 744.

[0192] The clamping pressure in the state where the grips are in contact with each other corresponds to the maximum clamping pressure. Fig.16 It is known that in Fig.11 In the resin eyelash curler 1 of the size of , the maximum curling pressure becomes 744, which is close to that of the metal one. Fig.11 The eyelash curler 1 can achieve the same maximum curling pressure as that of a metal eyelash curler.

[0193] ((Experimental Example 5))

[0194] The inventors determined Fig.11 A resin eyelash curler 1 of the size shown and Fig.15 The gripping force and curling pressure of a metal eyelash curler 9 of the dimensions shown.

[0195] Fig.17 The diagram shows a manual measuring mechanism for measuring the gripping force and the clamping pressure by applying a gradually changing load through the device, and the load position of the first measuring machine. Fig.17 In the figure, (a) is a diagram showing a measuring mechanism (manual pressure sensor) for measuring the curling pressure, and (b) is a diagram showing the position where the eyelash curler is fixed by the first testing machine and the load position where the load is applied.

[0196] Under the first measuring environment, the testing machine is relative to the eyelash curler 1, 9, as shown in FIG. Fig.17 As shown in (b), the handle 16 is fixed in a state of being on the lower side, and a load is applied from the upper side, that is, from the outer side of the handle 25.

[0197] In addition, the entrainment pressure ( Fig.19 ), when the eyelash curler 1 (9) is used to clamp the eyelashes, Fig.17 The pressure sensor 210 connected to the circuit board 220 is provided just below the clamp rubber R of the groove portion of the lower side pressurizing portion 31 shown in (a). Fig.17 (b) A load is applied to the position shown in FIG. 1 , thereby causing the upper pressurizing portion 11 to descend. Fig.17 When a varying load is applied to the load position shown in (b), the pressure (sandwiching pressure) of the lower pressurizing portion 31 pushed by the upper pressurizing portion 11 and the clamp rubber R is measured by a manual pressure measuring mechanism for causing the circuit board 220 to store the measured value of the pressure sensor 210.

[0198] It should be noted that Fig.17 The pressure sensor 210 shown in (a) is used with Figure 6 In this way, a pressure sensor 210 is provided just below the clamp rubber R to measure the pressure of clamping the eyelashes, that is, the curling pressure.

[0199] Fig.18 , Fig.19 This is in contrast to the first embodiment. Fig.11 The resin eyelash curler 1 and the metal eyelash curler 9 are Fig.17 The measurement results are shown in the measurement environment. Fig.18 Comparison of grip strength. Fig.19 Represents the comparison of entrainment pressure.

[0200] like Fig.18 As shown, the gripping force required to achieve the same displacement amount is substantially equal in the metal eyelash curler 9 and the resin eyelash curler 1. That is, it is known that the degree of easy deformation of the eyelash curler 1 is equal to that of the metal eyelash curler 9 of the comparative example.

[0201] In addition, according to Fig.19 When the gripping force is applied in such a way as to obtain the same displacement amount, the curling pressure of the resin eyelash curler 1 and the curling pressure of the metal eyelash curler 9 are substantially equal.

[0202] Through this experiment, using Fig.16 The maximum curling pressure is 700 or more. Fig.19 As shown in FIG. 1 , the displacement amount during use can be set to 14 mm as the displacement amount for making the clamping pressure during actual use reach the target value of about 500. Fig.16Compared with the clamping pressure (maximum clamping pressure: 744) from the displacement to the position where the handles 16 and 25 contact each other, the clamping pressure during use can be reduced (clamping pressure during use < maximum clamping pressure), so there is no need to make the handles 16 and 25 contact each other during use.

[0203] Therefore, in the eyelash curler 1 of the first embodiment, the curling pressure during use can be made to have a margin for the deformation amount relative to the maximum curling pressure, and the stress generated in the parts can be reduced.

[0204] By selecting a resin material and adjusting the section modulus in this manner, even if the eyelash curler is made of resin, it is possible to achieve the same curling pressure as the metal eyelash curler of the comparative example, and the gripping force for achieving the curling pressure can be made close to that of the metal eyelash curler.

[0205] ((Experimental Example 6))

[0206] The present inventors conducted an eyelash curling experiment on subjects using the resin eyelash curler 1. In this experiment, three subjects were used as subjects to measure the pressure during use of the resin eyelash curler 1, that is, the curling pressure.

[0207] Fig. 20 The results are obtained by measuring the curling pressure of the resin eyelash curler 1 when it is used using a hand-held measuring instrument.

[0208] exist Fig. 20 In the figure, the horizontal axis represents time and the vertical axis represents the entrainment pressure. Figure 6 Similarly, a pressure sensor is provided just below the clamp rubber of the eyelash curler that clamps the eyelashes, and the pressure of clamping the eyelashes, that is, the curling pressure, is measured.

[0209] It should be noted that Fig. 20 (a) with Figure 6 The person A shown in (a) is the same person, Fig. 20 (b) with Figure 6 The person B shown in (b) is the same person, Fig. 20 (c) with Figure 6 The person C shown in (c) is the same person.

[0210] Will Figure 6 and Fig. 20 By comparison, it can be seen that any person can achieve the same Figure 6 Therefore, the eyelash curler 1 can be used in the same manner as the metal eyelash curler 9 and in the same force application mode to achieve the curling of eyelashes by performing fine adjustments on one side.

[0211] ((Experimental Example 7))

[0212] In addition, a survey was conducted using different devices to investigate the use of the first embodiment. Fig.11 The size of the eyelash curler 1 and Fig.15 The experiment of curling pressure when using the metal eyelash curler 9 of the comparative example shown.

[0213] In this experiment, 6 subjects were used as subjects. Fig.15 The metal eyelash curler 9 of the size shown is used in the same manner as in normal use, using the following Fig.26 The sensor sheet 410 shown in (a) measures the pressure during use, i.e., the clamping pressure. At this time, the sensor sheet 410 that can be connected to an information processing device 430 such as a personal computer is inserted just below the clamp rubber R provided on the lower side pressurizing portion 91 as the part for clamping the eyelashes, and measures the pressure for clamping the eyelashes, i.e., the clamping pressure.

[0214] exist Fig.21 4 shows the measurement results of the eyelash curling pressure applied by a person when using the metal eyelash curler 9 using the sensor sheet 410. Fig.21 In the graphs (a) to (f), the vertical axis represents the clamping pressure and the horizontal axis represents the time (unit: second). The six test subjects are different from the above-mentioned A to F, and are set as person G, person H, person I, person J, person K, and person L.

[0215] according to Fig.21 It can be seen that all the subjects curled their eyelashes several times. In addition, there are individual differences in the total time or number of times required for curling eyelashes, the curling time per time, etc.

[0216] Here, if Fig.21 As shown, the maximum values ​​of the entrainment pressure of each person are 0.27, 0.16, 0.29, 0.21, 0.14, and 0.19 (N: Newton), respectively.

[0217] ((Experimental Example 8))

[0218] Fig. 22 The results are obtained by measuring the eyelash curling pressure applied by a person using the sensor sheet 410 when the eyelash curler 1 of the first embodiment made of 6PA+GF65% resin is used.

[0219] exist Fig. 22 In the figure, the horizontal axis represents time and the vertical axis represents the entrainment pressure. Fig.21 Similarly, the sensor sheet 410 is inserted just below the clamp rubber R for clamping the eyelashes of the eyelash curler 1, and the pressure of clamping the eyelashes, that is, the curling pressure, is measured.

[0220] It should be noted that in Fig. 22 In (a) to (f) and Fig.21 The person G, the person H, the person I, the person J, the person K, and the person L shown in (a) to (f) are the same person.

[0221] Here, if Fig. 22 As shown, the maximum values ​​of the entrainment pressure of each person are 0.26, 023, 0.24, 0.19, 0.14, and 0.25 (N: Newton), respectively.

[0222] Will Fig.21 and Fig. 22 By comparison, it can be seen that any person can achieve the same effect as the eyelash curler 1 of the second embodiment made of resin. Fig.21 The metal eyelash curler 9 in the embodiment has the same or higher curling pressure (eyelash curling pressure).

[0223] Therefore, the eyelash curler 1 of the first embodiment can achieve curling of eyelashes while making fine adjustments in a usage manner substantially similar to the metal eyelash curler 9 and in a manner of applying force in the same manner.

[0224] <Second embodiment>

[0225] Fig.23 It is a structural diagram of an eyelash curler 2 according to a second embodiment of the present invention. Fig.24 It is an exploded view of an eyelash curler 2 according to a second embodiment of the present invention.

[0226] In this embodiment, the material and the like are the same as the resin used in the first embodiment, but the engagement between the fixing member and the power point member, and the engagement between the power point member and the action member are different in the hinge structure and the like.

[0227] like Fig.23 As shown, in this embodiment, a fitting groove 53 which is a groove (recess) for fitting formed by recessing the lower side of the hinge is formed in a portion of the power point member 50 slightly away from the front end.

[0228] like Fig.24 As shown, the engagement hole portion 45 formed in the arm 44 of the fixing member 40 is provided with a fulcrum shaft 48 for fitting that extends in the width direction.

[0229] Furthermore, when the front end side arm 51 of the force point component 50 is inserted into the engaging hole portion 45 of the fixing component 40 from the end portion on the front end side opposite to the hand-holding portion 55, the force point component 50 is pressed downward relative to the fixing component 40, and the engaging groove 53 is engaged with the fulcrum shaft 48 in the engaging hole portion 45, thereby connecting the force point component 50 to the fixing component 40.

[0230] The fulcrum shaft 48 of the fixing member 40 fitted into the fitting groove 53 of the power point member 50 is used as the second fulcrum ( Figure 4The force point component 50 is connected to the fixed component 40 so as to be rotatable.

[0231] It should be noted that in Fig.24 , an example is shown in which the fulcrum shaft 48 extends over the entire width direction of the engagement hole 45 , but the fulcrum shaft 48 that can be engaged with the engagement groove 53 may also be in the shape of two-sided protrusions that protrude from the inner side surface of the engagement hole 45 and are interrupted in the center.

[0232] In addition, the action member 60 is provided with a lower side pressurizing portion 61, and link portions 62A and 62B whose one ends are connected to the lower side pressurizing portion 61. In this configuration, the other ends of the link portions 62A and 62B are bent into a U-shape and formed integrally, and the portion connecting the other ends of the link portions 62A and 62B at the other ends is a cylindrical fitting tube 63. The fitting tube 63 is an engaging portion of the action member 60.

[0233] A fitting hook 52 whose upper side is recessed is formed at the front end of the power point member 50 .

[0234] Then, the force point member 50 is pressed upward from the bottom relative to the action member 60, and the fitting hook 52 is engaged with the fitting tube 63, so that the force point member 50 is connected to the action member 60. In this way, the fitting hook 52 of the force point member 50 is fitted with the fitting tube 63 of the action member 60, so that the action member 60 can move in conjunction with the force point member 50.

[0235] In this way, the connection between the fixing member 40 and the force point member 50 is realized by using the hook shape ( Figure 4 The second fulcrum B of the force point member 50 and the connection between the action member 60 ( Figure 4 The first fulcrum A) of the embodiment can be installed and removed without using a shaft portion through which the components are passed for connection.

[0236] Therefore, the eyelash curler 2 of the second embodiment can achieve a completely metal-free engagement portion between components without using the pins PS1 and PS2 for connecting the components to each other in the first embodiment.

[0237] In addition, the engagement state can be released by applying force in the direction of the hook falling off, so that the user can disassemble and assemble it by hand. For example, when the eyelash curler 2 is dirty, even small bumps and grooves of the engagement part can be cleaned by disassembling and cleaning, and then the assembly can be performed.

[0238] In addition, for example, when a cosmetic bag or luggage is suddenly subjected to a load, damage can be avoided by making the hook fall off. At this time, the first fulcrum A and the second fulcrum B are engaged in opposite directions, so when a strong force is applied in one direction, only the engagement state of one of the first fulcrum A and the second fulcrum B falls off, so that when the engagement state is accidentally released, it can be easily restored.

[0239] In addition, a hook 52 with an upper recess is provided at the front end of the front end side arm 51 of the force point component 50, and a recessed recess is formed at the bottom of the front end of the front end side arm 51 closer to the front end than the handle 55. The extension parts (second arm parts) 51, 54 extend from the front end to the handle 55 in one line.

[0240] Therefore, also in the eyelash curler 2 of this embodiment, unlike the first embodiment, the grip portion can be thickened to the same thickness as the extension portion (arm portion), thereby improving the holding property compared to the metal.

[0241] Concavities and convexities are formed in a corrugated shape on the upper surface of a portion of the rear end side arm 54 of the power point member 50 that is closer to the second grip portion 55 than the fitting groove 53 .

[0242] The corrugated concavo-convex shapes 541 and 542 improve the fit. In particular, when applying makeup by yourself, the thumb is inserted into the finger hole of the grip part 46 on the side of the fixing member 40, and the other fingers are inserted into the finger holes of the grip part 55 on the side of the force point member 50. When the middle finger, which is the easiest to apply force, is inserted into the finger hole of the grip part 55 or the ring finger is inserted into the finger hole, the concavo-convex shapes 541 and 542 can also be used to support the force point member 50 with the index finger or the middle finger to stabilize the movement.

[0243] In addition, a finger hook portion 56 is provided at the rear end of the grip portion 55. For example, when the user curls his / her own eyelashes, the user inserts the middle finger into the finger hole of the grip portion 55 on the force point component 50 side and inserts the ring finger into the finger hook portion 56, or inserts the index finger into the finger hole of the grip portion 55 on the force point component 50 side and inserts the middle finger into the finger hook portion 56, or inserts the ring finger into the finger hole of the grip portion 55 on the force point component 50 side and inserts the little finger into the finger hook portion 56.

[0244] In this way, no matter which finger is inserted, in addition to the finger inserted into the finger hole of the hand-held part 55, the concave-convex shapes 541, 542 and the finger hook part 56 are also used to support the force point component 50. Therefore, when curling the eyelashes, the burden on one finger during pushing is shared, and the action is stable.

[0245] In addition, hit points 47 and 57 are provided respectively at the portions facing each other when the first grip portion 46 of the fixing member 40 and the second grip portion 55 of the power point member 50 are closed.

[0246] When pressing the eyelashes, the front ends of the collision points 47 and 57 of the grips 46 and 55 abut against each other, thereby preventing the force point member from being excessively rotated relative to the fixing member.

[0247] It should be noted that since the collision points 47 and 57 are provided inside the grip part to restrict the rotation, for example, when the rubber is flattened and becomes thinner due to repeated use, there is a possibility that the clamping pressure of the pressurizing part when pressed in may become insufficient. Therefore, when the collision points 47 and 57 are provided, it is preferable to set the length and the like to include the case where the rubber is flattened.

[0248] <Second embodiment and analysis>

[0249] ((Experimental Example 9))

[0250] Fig.25 2 is a diagram showing an example of the dimensions of the eyelash curler 2 according to the second embodiment. Fig.25 Designed according to the following dimensions shown.

[0251] The section modulus Z of the stress generating range of the fixing member 40 is 16.88 mm 3

[0252] The stress generation range of the force point component 50, that is, the section modulus Z of the arm portion 54 is 16.875 mm 3

[0253] It should be noted that in the present configuration, the arm portion 54 has projections and depressions on the outer side for placing fingers, and therefore the section modulus corresponds to the section modulus of the thinnest portion.

[0254] In addition, the arm portion 51 around the fulcrum B is thicker than the thinnest portion on the load point side, and its section modulus Z = 17.63 mm 3 , the section coefficient Z of the action part 60 = 1.725 mm 3 .

[0255] Fig.26 The diagram shows a measuring mechanism based on a sensor sheet for measuring a gripping force and a clamping pressure by applying a gradually changing load through a device, and a load position of a second testing machine.

[0256] exist Fig.26 Under the second measurement environment shown in FIG. 1 , the gripping force ( Fig. 27 ), use a testing machine different from the first testing machine.

[0257] Under the second measurement environment, the test machine is relative to the eyelash curler 1, 9, as shown in FIG. Fig.26 As shown in (b), the grip portion 16 is fixed in a downward state, and a load is applied from the middle side of the finger hole of the grip portion 25 (55, 85).

[0258] In addition, the entrainment pressure ( Fig.28 ) Fig.26 As shown in FIG. 2( a ), a sensor sheet 410 is provided directly below the clamp rubber R for clamping the eyelashes of the eyelash curler 1 ( 2 , 9 ) to measure the Fig.26 (b) The entrainment pressure when a variable load is applied by the second testing machine at the position shown.

[0259] It should be noted that the other end of the sensor sheet 410 is connected to the information processing device 430 via the sensor connector 420. Therefore, the sensor sheet 410 provided directly below the clamp rubber R in the groove of the lower pressurizing portion 31 (61, 91) measures the pressure (clamping pressure) of the lower pressurizing portion 31 pushed by the upper pressurizing portion 11 and the clamp rubber R when a variable load is applied by the second measuring machine, and automatically sends data to the information processing device 430 via the sensor connector 510. It should be noted that Fig.26 The sensor sheet 410 shown in (a) is used in the same manner as described above. Fig.21 , Fig. 22 The same as when measured by human hand.

[0260] exist Fig.26 Under the second measurement environment shown in FIG. Fig.26 (b) shows that the load is applied from the middle side of the finger hole of the grip portion 25 (55, 85), so the position where the load is applied is the same as that of the finger hole of the grip portion 25 (55, 85). Figure 4 The load point C is shown approximately close to the position.

[0261] According to the position of the load, the second measurement environment can be compared. Fig.14 The first measurement environment shown is closer to a state in which a person uses the eyelash curler, and a load is applied to the eyelash curler 1 (2, 9) to measure the gripping force and the curling pressure.

[0262] Fig. 27 is Fig.26 The gripping force (load) applied to the load point of the hand-held portion of four eyelash curlers, namely, metal, the first embodiment composed of 6PA+GF65% resin, the second embodiment composed of 6PA+GF65% resin, and the second embodiment composed of PAMXD6+GF50% resin, was measured under the measurement environment shown. PAMXD6 refers to polyamide MXD6.

[0263] It should be noted that, in the second embodiment, when using either 6PA+GF65% resin or PAMXD6+GF50% resin, Fig.25 The dimensions shown illustrate the shape of the eyelash curler 2 .

[0264] In addition, under the second measurement environment, if Fig.26 As shown in (b), when a load is applied to the eyelash curler 1 (2, 9) from the inner side of the finger hole of the grip portion 25 (55, 85), the position of the load point C is unified to the distance from the hinge portion ( Figure 4 Thus, in the four eyelash curlers 9, 1, and 2, the distances from the fulcrum B to the load point C are equal.

[0265] This setting can make it possible to eliminate almost no deviation in the measured value due to the difference in the distance from the supporting point B to the load point C caused by the difference in the shapes of the eyelash curlers 9, 1, and 2.

[0266] like Fig. 27 As shown, when the displacement is the same, the eyelash curlers 1 and 2 of the first embodiment, the second embodiment made of 6PA+GF65% resin, and the second embodiment made of PAMXD6+GF50% resin have a gripping force that is slightly less than that of the metal eyelash curler 9 but is roughly the same.

[0267] Fig.28 is Fig.26 The measurement results of the curling pressure of four types of eyelash curlers, namely, metal, the first embodiment composed of 6PA+GF65% resin, the second embodiment composed of 6PA+GF65% resin, and the second embodiment composed of PAMXD6+GF50% resin, were measured under the measurement environment shown.

[0268] like Fig.28 As shown, when the displacement is the same, the eyelash curlers 1 and 2 of the first embodiment, the second embodiment made of 6PA+GF65% resin, and the second embodiment made of PAMXD6+GF50% resin have slightly less but substantially the same curling pressure than metal ones.

[0269] ((Experimental Example 10))

[0270] exist Fig.17 The first measurement environment shown is Fig.26 The curling pressures of the metal eyelash curler 9 and the eyelash curler of the first embodiment made of 6PA+GF65% resin were measured under the two measurement environments shown to confirm the compatibility of the measurement environments.

[0271] About Fig.17 The data of the entrainment pressure measured under the first measurement environment shown in FIG. Fig.26 The data of the entrainment pressure measured under the second measurement environment shown are converted by taking the ratio of each measured value to obtain the correlation. Fig.29 It is its related table.

[0272] When converting the data of the first measurement environment (old measurement value) to the data of the second measurement environment (new measurement value), the error of the measurement value is also taken into account, and the old measurement value is multiplied by a value of 0.03% to 0.05%. In this way, the unitless old measurement value can be converted into the pressure unit (MPa) of the new measurement value.

[0273] From this we can see that Fig.17 The data of the first measurement environment shown is Fig.26 The data of the second measurement environment shown are correlated with each other and have few errors.

[0274] In addition, if Fig.21 , Fig. 22 The clamping pressure of the sensor sheet 410 during actual use is Fig.28 The measured entrainment pressure of the sensor sheet 410 is compared with that of the sensor sheet 410. Fig.21 , Fig. 22 The actual use of Fig.28 Thus, the eyelash curler 2 of the first embodiment can achieve the desired curling pressure and curl the eyelashes by displacing 13 mm or slightly more than 13 mm.

[0275] In addition, as mentioned above Fig.28 As shown, the curling pressure generated by the eyelash curler 2 of the second embodiment has the same level as that of the eyelash curler 1 of the first embodiment, and therefore it can be expected that the eyelash curler 2 is also at the same level as metal.

[0276] According to the above experiment, it is also possible to foresee that the eyelash curler 2 of the present embodiment can be used to Fig.10 The resin is within the recommended range of the section modulus and Young's modulus as shown, so that the same stress can be achieved by bending and curling pressure as metal. Therefore, the holding property of the grip can be improved, and the shape is not enlarged compared to metal, and the strength can be ensured, and the eyelash curling effect equivalent to that of metal can be exerted by the same operation as metal.

[0277] <Local eyelash curler>

[0278] It should be noted that, in the first and second embodiments described above, the description is based on the premise of a full-width eyelash curler that clamps the entire eyelashes close to the entire width of the eye, but the eyelash curler of the present invention having the above-mentioned material and cross-sectional shape may also be a local eyelash curler.

[0279] For example, a topical eyelash curler 3 such as Fig.30 As shown, it is also possible to have a structure similar to the first embodiment or the second embodiment described above, and the width of the upper pressing part 11P or the lower pressing part 31P for clamping the eyelashes is shorter. Therefore, the intervals between the support parts 12C, 13C, 12D, and 13D of the fixing member 10P and the intervals between the link parts 32C and 32D of the action member 30P are also narrower than those in the first embodiment.

[0280] Or, if Fig.31 As shown, it can also be a tweezers type local eyelash curler 4.

[0281] In topical eyelash curlers 3 and 4, by using Fig.10 The resin within the recommended range defined by the section modulus and Young's modulus shown above can achieve the same stress by bending and curling pressure as metal, and thus can exert the same eyelash curling effect as metal.

[0282] It should be noted that Fig.30 The local eyelash curlers 3 and 4 shown require less force than the global eyelash curlers. Therefore, if the material meets the Young's modulus in the recommended range, the section modulus of the specified thickness can be slightly smaller than the recommended range.

[0283] <Makeup tool 1 (tweezers)>

[0284] In the above description, an eyelash curler is described as an example of a makeup tool, but the makeup tool to which the present resin can be applied is not limited to the eyelash curler.

[0285] For example, as an example of a makeup tool that can be made of resin, Fig.32 Shown is a pair of tweezers 5. The tweezers are used for beauty treatment, for example, for plucking hair (human hair) such as human hair, eyebrows, nose hair, body hair or animal hair.

[0286] In the present tweezers, by using Fig.10 The resin within the recommended range defined by the section modulus and Young's modulus shown above can achieve the same stress by bending and clamping pressure as metal, and thus can exert the same hair removal effect as metal.

[0287] <Makeup tool 2 (scissors)>

[0288] In addition, as another example of a makeup tool that can be made of resin, Fig.33 Shown are grooming scissors.

[0289] The beauty scissors 6 are used to cut off hair such as human hair, eyebrows, nose hair, body hair or animal hair. In addition, the makeup tool made of resin can also be a razor, nail clippers, etc.

[0290] In the present scissors, by using the above Fig.10 The resin in the recommended range defined by the section modulus and Young's modulus shown above can achieve the same stress by bending as metal, and thus can exert the same holding feeling and shearing feeling as metal by bending as metal.

[0291] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-mentioned specific embodiments, and various modifications and changes can be made within the scope of the gist of the embodiments of the present invention described in the claims.

[0292] This application claims priority based on Japanese Patent Application No. 2018-174219 filed with the Japan Patent Office on September 18, 2018, and this application cites the entire contents of Japanese Patent Application No. 2018-174219.

[0293] Explanation of symbols

[0294] 1.2 Eyelash curler

[0295] 3.4 Local eyelash curler

[0296] 5. Tweezers

[0297] 6 Beauty scissors

[0298] 10. Fixing parts

[0299] 11 Upper side pressure part

[0300] 12 (12A, 12B) upper side support portion (support portion)

[0301] 13 (13A, 13B) branch support portion (support portion)

[0302] 14 arms (1st arm)

[0303] 15 engagement hole

[0304] 151A, 151B small hole

[0305] 16 Handheld

[0306] 20 Force point components

[0307] 21 front end side arm (arm, second arm)

[0308] 22 Front end side engagement hole (first engagement hole)

[0309] 23 2nd engagement hole

[0310] 24 rear end side arm (arm, second arm)

[0311] 25 Handheld

[0312] 30 Functional parts

[0313] 31 Lower side pressure part (contact member, upper clamping piece)

[0314] 311A, 311B snap hook (snap part)

[0315] 32A, 32B connecting rod

[0316] 33 Connection

[0317] 331A, 331A small hole

[0318] 400 Fixed parts

[0319] 41 Upper side pressure part

[0320] 42 (12A, 12B) upper side support portion (support portion)

[0321] 43 (13A, 13B) branch support portion (support portion)

[0322] 44 Arm

[0323] 45 engagement hole

[0324] 46 Handheld

[0325] 47 Collision Point

[0326] 48 Pivot axis

[0327] 50 force point components

[0328] 51 front side arm (arm)

[0329] 52: hook for fitting (connection part)

[0330] 53 fitting groove (fitting portion, connecting portion)

[0331] 54 rear end side arm (arm)

[0332] 55 Handheld

[0333] 56 Finger Hook

[0334] 57 Collision Point

[0335] 60 Functional parts

[0336] 61 lower side pressurizing portion (contact member, upper clamping piece)

[0337] 611A, 611B snap hook (snap part)

[0338] A pivot

[0339] B Pivot

[0340] C Load point

[0341] PS1 Pin

[0342] PS2 Pin

[0343] R Grip Rubber

Claims

1. An eyelash curler comprising: A fixing member integrally formed with an upper pressure portion, a pair of pillars for supporting both ends of the upper pressure portion in the width direction, an extended first arm portion, and a first grip portion for hooking a user's finger; an action member having a lower pressure portion movable in the up-down direction relative to the upper pressure portion; as well as The force point component is integrally formed with an extended second arm portion and a second grip portion for hooking the user's finger, and the action component is moved up and down by rotating with a part of the fixed component as a fulcrum. The fixing part, the action part, and the force point part are respectively made of a material with a Young's modulus of 2500 N / mm 2 ~40000N / mm 2 The resin material is integrally constructed. When the lower pressurizing part is brought close to the upper pressurizing part to apply pressure to the eyelashes, the first arm of the fixing member and the second arm of the force point member are stress generating ranges where a large stress is generated. At least in the stress generating range, the section modulus is 5 mm. 3 ~40mm 3 .

2. The eyelash curler according to claim 1, wherein: The resin material is a fiber-reinforced resin containing glass fiber (GF) and / or carbon fiber (CF).

3. The eyelash curler according to claim 2, wherein: The fiber-reinforced resin includes any one of polyamide (PA), polyetheretherketone (PEEK), polyethylene terephthalate (PETG), ethylene glycol-modified PET (PETG), polyphenylene sulfide (PPS), and polyamide MXD6, or includes two or more thereof.

4. The eyelash curler according to claim 2, wherein: The glass fiber (GF) is blended in an amount of 30 mass % to 65 mass % in the fiber-reinforced resin.

5. The eyelash curler according to claim 1, wherein: The resin material is a resin including any one of nylon 6 / 10, polyamide MXD6, polyetheretherketone (PEEK), polyethylene terephthalate (PETG), ethylene glycol-modified PET (PETG), or polyphenylene sulfide (PPS).

6. The eyelash curler according to any one of claims 1 to 5, further comprising: an elastic member inserted into the groove on the upper surface of the lower pressure portion, in, By bringing the second hand-held portion of the force point component close to the first hand-held portion of the fixing component, the lower pressure portion of the action component is brought close to the upper pressure portion of the fixing component, so that pressure is applied to the eyelashes between the elastic component and the upper pressure portion. An engaging hole portion is formed at an upper end of the first arm portion of the fixing member and penetrates in a direction orthogonal to the width direction and the extending direction of the first arm portion. In the second arm portion of the power point member, the width of the front end portion on the opposite side to the second grip portion in the width direction is narrower than the width of the rear end portion in the width direction. An engaging hole penetrating in the width direction is formed on the rear end side of the front end portion of the second arm portion. Small holes are formed on two side walls of the engaging hole of the fixing component. When the front end portion of the force point component is inserted into the engaging hole portion of the fixing component from the upper end and the front end side of the front end portion protrudes to the upper side of the engaging hole portion, it is stopped by a pin shaft that passes through the engaging hole and the small hole of the two side walls, and the pin shaft is a fulcrum for rotation of the fixing component.

7. The eyelash curler according to any one of claims 1 to 5, further comprising: an elastic member inserted into the groove on the upper surface of the lower pressure portion, in, By bringing the second hand-held portion of the force point component close to the first hand-held portion of the fixing component, the lower pressure portion of the action component is brought close to the upper pressure portion of the fixing component, so that pressure is applied to the eyelashes between the elastic component and the upper pressure portion. An engaging hole portion is formed at an upper end of the first arm portion of the fixing member and penetrates in a direction orthogonal to the width direction and the extending direction of the first arm portion. In the second arm portion of the power point member, the width of the front end portion on the opposite side to the second grip portion in the width direction is narrower than the width of the rear end portion in the width direction. A recessed portion for fitting is formed on the rear end side of the front end portion of the force point component. In the fixing member, a fulcrum shaft extending in the width direction is provided inside the engagement hole. When the front end portion of the force point component is inserted into the engagement hole portion of the fixing component from the upper end and the front end side of the front end portion protrudes to the upper side of the engagement hole portion, the force point component is connected to the fixing component so as to be freely rotatable by using the engagement portion formed by the engagement recess of the force point component and the fulcrum axis of the fixing component as a fulcrum, thereby transmitting the force generated by the rotation to the action component in an upward manner.

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