Female snap fastener

Abstract

The present invention provides a metal female snap fastener which can be mass-produced, has high sustainability, can improve the operating force, and prevents clothes and the like from hanging on a deformation part. The present invention relates to a metal female snap fastener (10, 20, 30) which is made of a single member and can be attached to and detached from a male snap fastener (40). The female snap fastener (10, 20, 30) is provided with: a cylindrical section (11, 21, 31) that defines an engagement space (S) capable of accommodating the engagement section (41) of the male snap fastener (40); a flange section (18, 28, 38) that extends radially outward from one axial end of the cylindrical section (11, 21, 31); and a base section (19, 29, 39) that extends radially inward from the other axial end of the cylindrical section (11, 21, 31). The cylindrical section (11, 21, 31) comprises: a plurality of slits (12, 22, 32, 12a, 12b, 12c) that extend in the axial direction of the cylindrical section (11, 21, 31) and are provided in the circumferential direction; and a plurality of deformation parts (13, 23, 33) which elastically deform when the male snap fastener (40) is attached to and detached from the male snap fastener (40). The slits (12, 22, 32, 12a, 12b, 12c) are not continuous with each other. Each deformation part (13, 23, 33) is defined between two slits (12, 22, 32, 12a, 12b, 12c) adjacent to each other in the circumferential direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a female snap, and particularly to a metal female snap composed of a single component. BACKGROUND

[0002] As a female snap, a structure in which a wire spring is incorporated into a metal snap body is generally known. The wire spring elastically deforms at the time of attachment and detachment of a male snap, and in addition, improves the coupling force with the male snap. However, this type of female snap is composed of two components of the snap body and the wire spring. Therefore, the wire spring needs to be formed in a manner corresponding to a specific snap body and incorporated into the snap body, and thus, there is a problem that mass production is not suitable. In addition, particularly since a wire spring is used, there is also a problem that sustainability is low.

[0003] International Publication No. 2021 / 255942 (Patent Literature 1) and Japanese Patent No. 4989520 (Patent Literature 2) disclose metal female snaps that do not use a wire spring. The female snaps of Patent Literature 1 and Patent Literature 2 include a plurality of elastically deformable portions that stand from a base portion. Each elastically deformable portion is separated from a flange portion or a cover portion on the side opposite the base portion. Each elastically deformable portion temporarily flexes in the radial direction in and out at the time of attachment and detachment of a male snap, but the center of this flexing is the base end portion of each elastically deformable portion, that is, the interface with the base portion. Since the flexing action centered on this base end portion is repeatedly performed, in the above female snaps, there is a limit to the force required for the flexing of the elastically deformable portions, the coupling action (the action of coupling the male snap), and the uncoupling action (the action of uncoupling the coupling with the male snap), and there is a problem that a certain or greater action force cannot be generated. In addition, there is also a problem that the base end portion of each elastically deformable portion is easily subject to metal fatigue. Furthermore, in the above female snaps, the end portion of the elastically deformable portion on the side opposite the base end portion is interrupted from the flange portion or the cover portion, and thus, there is a problem that clothes or the like easily get caught on this end portion.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: International Publication No. 2021 / 255942

[0007] Patent Literature 2: Japanese Patent No. 4989520 SUMMARY

[0008] PROBLEMS TO BE SOLVED BY THE INVENTION

[0009] The present application was completed in view of the above problems, and aims to provide a metal female snap that can be mass-produced, has high sustainability, can improve the action force, and on which clothes or the like do not get caught.

[0010] Solution for solving the problem

[0011] To address the aforementioned issues, according to the present invention, a female snap fastener is provided, which is a metal female snap fastener (10, 20, 30) consisting of a single component that can be detached from and assembled with a male snap fastener (40). The female snap fastener comprises: a cylindrical portion (11, 21, 31) defining an engagement space (S) capable of accommodating an engagement portion (41) of the male snap fastener (40); a flange portion (18, 28, 38) extending radially outward from one axial end of the cylindrical portion (11, 21, 31); and a base portion (19, 29, 39) extending radially outward from the cylindrical portion (11, 21, 31). 1) The other end of the axial direction extends inward in the radial direction. The cylindrical part (11, 21, 31) includes: a plurality of slits (12, 22, 32, 12a, 12b, 12c) extending along the axial direction of the cylindrical part (11, 21, 31) and provided in the circumferential direction; and a plurality of deformable parts (13, 23, 33) that undergo elastic deformation when detached from or attached to the male snap fastener (40). Each slit (12, 22, 32, 12a, 12b, 12c) is discontinuous with each other, and each deformable part (13, 23, 33) is defined between two adjacent slits (12, 22, 32, 12a, 12b, 12c) in the circumferential direction.

[0012] The female snap button of the present invention is composed of a single component and does not use additional springs or the like. Therefore, it can be mass-produced and is sustainable without the use of springs. In addition, the female snap button of the present invention is made of metal, such as aluminum, aluminum alloy, copper, copper alloy, iron, stainless steel, etc., but is not limited to these.

[0013] In this invention, a plurality of slits are provided circumferentially in the cylindrical portion of the female snap fastener. Each slit penetrates the cylindrical portion in the thickness direction and extends axially along the cylindrical portion. The slits are discontinuous; in other words, one slit is not continuous with another circumferentially adjacent slit, and each slit is independent. One end of each slit is located at the flange side end of the cylindrical portion, and the other end of each slit is located at the base side end of the cylindrical portion. Each slit extends only between the flange side end and the base side end of the cylindrical portion.

[0014] In this invention, the cylindrical portion of the female snap includes multiple deformable portions that elastically deform during assembly and disassembly with the male snap. Each deformable portion is defined between two adjacent circumferential slits. With use of the female snap, each deformable portion repeatedly flexes radially inward and outward, but each deformable portion is connected to the flange and base, resulting in a shape where the upper and lower ends of each deformable portion are supported by the flange and base. Therefore, the flexural force of each deformable portion, the reduction in the force required for the engagement and disengagement actions, and metal fatigue of each deformable portion can be suppressed in the medium to long term.

[0015] In one embodiment of the present invention, all portions between two adjacent slits in the cylindrical portion along the circumferential direction can be configured as deformable portions. For example, if six slits are provided in the cylindrical portion in the circumferential direction, then six slits are defined in the circumferential direction between two slits in the cylindrical portion. In one embodiment, all six portions between the slits can be configured as deformable portions.

[0016] In another embodiment of the invention, the cylindrical portion (11, 21) includes non-deformable portions (14, 24) that do not deform when detached from the male snap fastener (40) between two circumferentially adjacent deformable portions (13, 23). Each non-deformable portion is defined between two circumferentially adjacent slits. In this embodiment, in the example where the portion between two slits is defined circumferentially by the aforementioned six slits, it is possible to alternately provide three deformable portions and three non-deformable portions circumferentially.

[0017] In one embodiment of the invention, each deformable portion (13, 23, 33) has a locking end (13a, 23b, 33a) that protrudes most inward in the radial direction. When the cylindrical portion includes a non-deformable portion, at least a portion of the deformable portion protrudes more inward in the radial direction than the non-deformable portion. By increasing or decreasing the inner diameter of each deformable portion (e.g., the diameter passing through the most protruding locking end in the radial direction), the force required for operation can be varied. Furthermore, by changing the circumferential spacing of each deformable portion, the number of deformable portions, the presence or absence of non-deformable portions, etc., as described later, the operating force, which varies according to the increase or decrease of the inner diameter of the deformable portion, can be adjusted to a more preferred value.

[0018] In one embodiment of the present invention, the circumferential spacing of the non-deformable portion (14) is larger than the circumferential spacing of the deformable portion (13). In another embodiment of the present invention, the circumferential spacing of the deformable portion (23) is larger than the circumferential spacing of the non-deformable portion (24). In addition to the increase or decrease of the inner diameter of the deformable portion as described above, by changing the circumferential spacing of each deformable portion and the circumferential spacing of each non-deformable portion in this way, it is possible to set and adjust the optimal operating value, taking into account factors such as the direction when connected to the male snap fastener.

[0019] The effects of the invention

[0020] In this invention, the female snap fastener is constructed from a single component, eliminating the need for additional springs or the like, thus enabling mass production and sustainable manufacturing without the need for springs. Furthermore, each deformable portion of the cylindrical section in the female snap fastener is defined between two adjacent circumferential slits and connected to the flange and base. Therefore, even with repeated bending over a long period, the shape of each deformable portion supported by the flange and base suppresses the reduction in bending force, the force required for fastening, and the force required for unlocking, preventing metal fatigue in each deformable portion. Additionally, clothing and the like will not get caught on the deformable portions. Attached Figure Description

[0021] Figure 1 This is a perspective view of the female snap button 10 according to the first embodiment of the present invention.

[0022] Figure 2 This is a top view of the mother snap 10.

[0023] Figure 3 yes Figure 2 A-A line sectional view.

[0024] Figure 4 This is a cross-sectional view showing the connection state between the female snap 10 and the male snap 40.

[0025] Figure 5 This is a cross-sectional view showing the intermediate state of disconnecting the female snap 10 and the male snap 40.

[0026] Figure 6 This is a top view of the female snap button 20 according to the second embodiment of the present invention.

[0027] Figure 7 From Figure 6 Arrow B shows the side view.

[0028] Figure 8 yes Figure 6 The C-C line sectional view.

[0029] Figure 9 This is a top view of the female snap button 30 according to the third embodiment of the present invention.

[0030] Figure 10 From Figure 9 Arrow D shows the side view.

[0031] Figure 11 yes Figure 9 Sectional view along line E-E.

[0032] Figure 12 It is used to represent a modified example of a slit. Figure 3 Roughly the same sectional view.

[0033] Figure 13 This is another variation used to represent a slit. Figure 3 Roughly the same sectional view.

[0034] Figure 14 This is another variation used to represent a slit. Figure 3 Roughly the same sectional view. Detailed Implementation

[0035] Hereinafter, some embodiments of the present invention will be described based on the accompanying drawings. However, the present invention is not limited to these embodiments and modifications can be made within the scope of the claims. Figure 1 and Figure 2 These are perspective and top views of the female snap button 10 according to the first embodiment of the present invention. Figure 3 yes Figure 2 A-A sectional view. In the following description, the top and bottom settings of the female snaps 10, 20, and 30 are based on... Figure 3 , Figure 8 , Figure 11 The orientation of the paper.

[0036] The female snap fastener 10 is a single component manufactured by deep drawing or other processes on a sheet metal. The female snap fastener 10 includes a cylindrical portion 11, a flange portion 18, and a base portion 19. The cylindrical portion 11 internally defines a space capable of accommodating the male snap fastener 40 (see reference). Figure 4 , Figure 5 The engaging space S of the engaging portion 41 of the cylindrical portion 11. The flange portion 18 extends radially outward from one axial end, i.e., the upper end, of the cylindrical portion 11. The flange portion 18 extends radially outward from the upper end of the cylindrical portion 11 in a downwardly inclined manner, then extends downward, and then folds inward in a C-shape in the radial direction to terminate. The base portion 19 extends radially inward from the other axial end, i.e., the lower end, of the cylindrical portion 11. A circular opening 19a is provided in the base portion 19. The opening 19a is an opening for the shaft portion of the mounting piece (not shown) to pass through when the female snap fastener 10 is installed on fabric such as clothing. The shaft portion passing through the opening 19a into the cylindrical portion 11 is fastened to the base portion 19.

[0037] In the first embodiment, for example, six linear slits 12 are provided in the circumferential direction in the cylindrical portion 11. Each slit 12 extends axially along the cylindrical portion 11, that is, it extends vertically. Each slit 12 is discontinuous with each other. In other words, one slit 12 is not continuous with another slit 12 adjacent in the circumferential direction, and each slit 12 is independent. Each slit 12 penetrates the cylindrical portion 11 in the thickness direction. That is, it penetrates between the inner and outer circumferential surfaces of the cylindrical portion 11. Each slit 12 extends only between the upper and lower ends of the cylindrical portion 11. In other words, each slit 12 terminates at the upper end of the cylindrical portion 11 and at the lower end of the cylindrical portion 11. Each slit 12 is formed by shearing metal material during the manufacture of the female snap 10, but as described later, the slits can also be formed by cutting away metal material.

[0038] The cylindrical portion 11 alternately includes, in the circumferential direction, three deformable portions 13 that elastically deform during the assembly and disassembly of the male snap 40, and three non-deformable portions 14 that do not deform during the assembly and disassembly of the male snap 40. Each deformable portion 13 and each non-deformable portion 14 is defined between two circumferentially adjacent slits 12. In other words, each deformable portion 13 and each non-deformable portion 14 is the portion between two circumferentially adjacent slits 12 in the cylindrical portion 11. Each deformable portion 13 and each non-deformable portion 14 is connected to the flange portion 18 above and to the base portion 19 below. Each deformable portion 13 is connected to the flange portion 18 and the base portion 19 in the entire circumferentially spaced region, that is, in the entire spaced region between the two circumferentially adjacent slits 12 defining each deformable portion 13.

[0039] In the female snap 10, each deformable portion 13 is machined to protrude radially inward compared to each non-deformable portion 14. Each deformable portion 13 has a locking end 13a that protrudes radially inward at its upper end. Each deformable portion 13 has an upper inclined surface 13b extending from the locking end 13a toward the flange portion 18 and a lower inclined surface 13c extending from the locking end 13a toward the base portion 19. The upper inclined surface 13b and the lower inclined surface 13c protrude radially inward compared to the non-deformable portions 14. In other words, the diameter of the cylindrical portion 11 along the inner diameter of the deformable portion 13 gradually decreases from the upper end of the cylindrical portion 11 toward the locking end 13a at the upper inclined surface 13b, reaching its minimum at the locking end 13a, and gradually increases from the locking end 13a toward the lower end of the cylindrical portion 11 at the lower inclined surface 13c. The inner diameter of the cylindrical portion 11 along the non-deformable portion 14 is approximately constant between the upper and lower ends of the cylindrical portion 11.

[0040] Figure 4 This is a cross-sectional view showing the connection state between the female snap 10 and the male snap 40. Figure 5 This is a cross-sectional view showing the intermediate state of disconnecting the female snap 10 and the male snap 40. The male snap 40 has an engaging portion 41 and a base portion 42. The engaging portion 41 includes a large-diameter portion 41a and a narrowing portion 41b with a diameter smaller than that of the large-diameter portion 41a. The outer diameter of the large-diameter portion 41a is larger than the inner diameter of the engaging end 13a along the deformable portion 13 of the cylindrical portion 11 in the female snap 10, and smaller than the inner diameter along the non-deformable portion 14. The female snap 10 and the male snap 40 are connected by inserting the engaging portion 41 of the male snap 40 into the engaging space S of the female snap 10. When the engaging portion 41 of the male snap 40 is inserted into the engaging space S of the female snap 10 and when the engaging portion 41 is pulled out of the engaging space S, the deformable portion 13 of the female snap 10 is temporarily elastically deformed outward in the radial direction by the large-diameter portion 41a of the engaging portion 41 (see reference). Figure 5 (The dashed line), then restore it to its original shape in the radial direction inward.

[0041] In the female snap 10 of the first embodiment, the operating force can be changed and adjusted by increasing or decreasing the inner diameter of the engagement end 13a of each deformable portion 13. Furthermore, in the female snap 10, the interval between two adjacent circumferential slits 12 is set such that the non-deformable portion 14 is larger than the deformable portion 13. In the female snap 10, the number of slits 12 is set to 6, the number of deformable portions 13 is set to 3, and the number of non-deformable portions 14 is set to 3. Besides increasing or decreasing the inner diameter of the engagement end 13a of the deformable portion 13, the operating force of the deformable portion 13 can be adjusted to a desired value by changing the circumferential interval between each deformable portion 13 and each non-deformable portion 14. Furthermore, as the female snap 10 is used, each deformable portion 13 repeatedly flexes inward and outward in the radial direction. However, since each deformable portion 13 is connected to the flange portion 18 and the base portion 19, forming a shape where the upper and lower ends of each deformable portion 13 are supported by the flange portion 18 and the base portion 19, the force required for operation can be increased. Furthermore, clothing and other items will not get caught on the deformable parts 13 and the non-deformable parts 14. The advantages of the female snap 10 described above also apply to the female snaps 20 and 30 described later.

[0042] Figure 6 This is a top view of the female snap button 20 according to the second embodiment of the present invention. Figure 7 From Figure 6 Arrow B shows the side view. Figure 8 yes Figure 6 The figure shows a cross-sectional view along line C-C. The female snap fastener 20 is a single, metal component, comprising a cylindrical portion 21, a flange portion 28 extending radially outward from the upper end of the cylindrical portion 21, and a base portion 29 extending radially inward from the lower end of the cylindrical portion 21. The base portion 29 has an opening 29a for a mounting component (not shown) to pass through. The cylindrical portion 21 of the female snap fastener 20 differs from the cylindrical portion of the female snap fastener 10 in the first embodiment, while the flange portion 28 and the base portion 29 are substantially the same as the flange portion and base portion of the female snap fastener 10.

[0043] In the cylindrical portion 21, for example, eight linear slits 22 are provided in the circumferential direction. Each slit 22 extends axially along the cylindrical portion 21. Each slit 22 penetrates the cylindrical portion 21 in the thickness direction. The upper end of each slit 22 terminates at the upper end of the cylindrical portion 21, and the lower end of each slit 22 terminates at the lower end of the cylindrical portion 21. The cylindrical portion 21 alternately includes four deformable portions 23 and four non-deformable portions 24 in the circumferential direction. Each deformable portion 23 and each non-deformable portion 24 is defined between two adjacent circumferentially oriented slits 22. The circumferentially spaced area of ​​each deformable portion 23 and each non-deformable portion 24 is connected to the flange portion 28 above and to the base portion 29 below. In the female snap 20 of the second embodiment, the spacing between two adjacent circumferentially oriented slits 22 is set such that the deformable portion 23 is larger than the non-deformable portion 24.

[0044] In the female snap 20, each deformable portion 23 includes a protrusion 23a at its upper end that protrudes radially inward from each non-deformable portion 24. Each protrusion 23a protrudes radially inward with a convexly curved cross-section. Each protrusion 23a has a locking end 23b that protrudes radially inward. The inner diameter of the cylindrical portion 21 along the non-deformable portion 24 is approximately constant between its upper and lower ends. The lower portion of each deformable portion 23, excluding the protrusion 23a, is located at the same radial position as the non-deformable portion 24 and does not protrude radially inward relative to the non-deformable portion 24. In other words, the inner diameter of the lower portion of the cylindrical portion 21, excluding the protrusion 23a of the deformable portion 23, is the same as the inner diameter of the cylindrical portion 21 along the non-deformable portion 24. In the female snap 20, during the attachment and detachment of the male snap 40, the deformable portion 23 flexes radially inward and outward from the protrusion 23a. Even with repeated bending over a long period of time, since the circumferential spacing of each deformable part 23 is connected to the flange part 28 and the base part 29, the bending force of each deformable part 23, the force required for the fastening action and the unfastening action can be suppressed.

[0045] The first and second embodiments described above include non-deformable portions 14 and 24 between two adjacent deformable portions 13 and 23 along the circumferential direction. However, the present invention also includes embodiments that do not include non-deformable portions. This embodiment will be described below. Figure 9 This is a top view of the female snap button 30 according to the third embodiment of the present invention. Figure 10 From Figure 9 Arrow D shows the side view. Figure 11 yes Figure 9 The cross-sectional view along line E-E shows the female snap fastener 30, which is a single metal component. It includes a cylindrical portion 31, a flange portion 38 extending radially outward from the upper end of the cylindrical portion 31, and a base portion 39 extending radially inward from the lower end of the cylindrical portion 31. The base portion 39 has an opening 39a for a mounting component (not shown) to pass through. The cylindrical portion 31 of the female snap fastener 30 differs from the cylindrical portions of the female snap fasteners 10 and 20 in the first and second embodiments, while the flange portion 38 and the base portion 39 are substantially the same as the flange portion and base portion of the female snap fasteners 10 and 20.

[0046] In the cylindrical portion 31, for example, four linear slits 32 are provided at 90-degree intervals in the circumferential direction. Each slit 32 extends axially along the cylindrical portion 31. Each slit 32 penetrates the cylindrical portion 31 in the thickness direction. The upper end of each slit 32 terminates at the upper end of the cylindrical portion 31, and the lower end of each slit 32 terminates at the lower end of the cylindrical portion 31. The cylindrical portion 31 includes four deformable portions 33 defined between two circumferentially adjacent slits 32. That is, in the female snap 30, the entire area of ​​the cylindrical portion 31 is set as deformable portions 33, and no non-deformable portions are provided. Each deformable portion 33 is circumferentially spaced across its entire area and is connected to the flange portion 38 above and the base portion 39 below.

[0047] In the female snap 30, each deformable portion 33 has a locking end 33a that protrudes most inward in the radial direction. The inner diameter of the cylindrical portion 31 gradually decreases from the flange portion 38 towards the locking end 33a and gradually increases from the locking end 33a towards the base portion 39. The cross-section of each deformable portion 33 is curved inward in the radial direction between the flange portion 38 and the locking end 33a, and is straight between the locking end 33a and the base portion 39. In the female snap 30, when the male snap 40 is attached or detached, the deformable portion 33 flexes inward and outward in the radial direction from the locking end 33a. Even with repeated flexing over a medium to long period of time, since the circumferential spacing of each deformable portion 33 is connected to the flange portion 38 and the base portion 39, the flexing force of each deformable portion 33 and the reduction of the force required for the fastening and unfastening actions can be suppressed.

[0048] Figures 12-14 It is used to represent a modified example of a slit. Figure 3 Roughly the same sectional view. Figures 12-14 In the middle, the structures other than slits 12a, 12b, and 12c are... Figures 1-3 The female snap 10 shown is essentially the same, therefore, in Figures 12-14 The accompanying diagram uses reference numerals for the female snap 10. Furthermore, in... Figures 12-14 The card-joining end 13a is omitted in the middle. Figures 12-14 cross section and Figure 3 The cross section is offset in the circumferential direction compared to the cylindrical part 11. Figure 12 The slit 12a shown is a thick line that is long from top to bottom. In other words, the slit 12a is a rectangular shape that is thin from top to bottom. This slit 12a is formed by cutting away metal material during the manufacture of the female snap 10. Figure 13 The slit 12b shown is a shape that slightly widens from the top and bottom to the middle. In other words, the slit 12b is an ellipse flattened into a long and narrow shape. This slit 12b is also formed by cutting away metal material during the manufacture of the female snap 10. Figure 14The slit 12c shown includes a circular cut-off portion 12d at its lower end. Except for the cut-off portion 12d, the slit 12c is formed by shearing a metal material, but the cut-off portion 12d is formed by cutting a metal material.

[0049] Explanation of reference numerals in the attached figures

[0050] 10, 20, 30 female snap buttons

[0051] 11, 21, 31 cylindrical part

[0052] Slits 12, 22, 32, 12a, 12b, 12c

[0053] Deformation parts 13, 23, and 33

[0054] 13a, 23b, 33a Clamping ends

[0055] 23a convex part

[0056] 14, 24 Non-deformable parts

[0057] S Card Space

[0058] 40mm snap fastener

[0059] 41. Card-connecting section.

Claims

1. A female snap fastener, said female snap fastener being a single-piece metal female snap fastener (10, 20, 30) detachable from a male snap fastener (40), wherein, The female snap fastener has: The cylindrical portion (11, 21, 31) defines an engagement space (S) capable of accommodating the engagement portion (41) of the male snap (40). Flange portions (18, 28, 38) extending radially outward from one axial end of the cylindrical portions (11, 21, 31); and The base portion (19, 29, 39) extends radially inward from the other end of the cylindrical portion (11, 21, 31). The cylindrical portion (11, 21, 31) includes: a plurality of slits (12, 22, 32, 12a, 12b, 12c) extending axially along the cylindrical portion (11, 21, 31) and provided in the circumferential direction; and a plurality of deformable portions (13, 23, 33) that elastically deform when detached from or attached to the male snap fastener (40). The slits (12, 22, 32, 12a, 12b, 12c) are discontinuous. Each deformable part (13, 23, 33) is confined between two adjacent slits (12, 22, 32, 12a, 12b, 12c) along the circumferential direction.

2. The female snap fastener according to claim 1, wherein, The cylindrical portion (11, 21) includes a non-deformable portion (14, 24) that does not deform when being attached to or detached from the male snap (40) between two adjacent deformable portions (13, 23) along the circumferential direction.

3. The female snap fastener according to claim 1 or 2, wherein, Each of the deformable parts (13, 23, 33) has a locking end (13a, 23b, 33a) that protrudes most inward in the radial direction.

4. The female snap fastener according to claim 2, wherein, The circumferential spacing of the non-deformable portion (14) is larger than the circumferential spacing of the deformable portion (13).

5. The female snap fastener according to claim 2, wherein, The circumferential spacing of the deformable portion (23) is larger than the circumferential spacing of the non-deformable portion (24).

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