Snap fastener provided with self-locking petal type spring piece and easy to enter and difficult to exit

Abstract

The snap fastener comprises a male fastener and a female fastener, the male fastener comprises a male fastener surface and a male fastener button bead, the female fastener comprises a female fastener slingshot cup and a female fastener surface, the female fastener slingshot cup is provided with a buckling cavity position for buckling the male fastener button bead, the self-locking petal type spring piece is arranged in the buckling cavity position, and the self-locking petal type spring piece is arranged in the buckling cavity position. The self-locking petal type spring piece is an annular metal piece formed through stamping, the annular metal piece comprises an annular side wall and an annular bottom wall which is perpendicular to the lower end of the annular side wall and bent inwards by 90 degrees, the inner edge of the annular bottom wall is an annular flanging edge which is chamfered and flanged upwards by 90 degrees, and a plurality of notches are evenly formed in the annular flanging edge to form a multi-petal inner flanging edge. The outer wall of the male button bead is provided with an annular groove position, and the edge of the inner flanging is buckled, self-locked and clamped with the annular groove position. The self-locking petal type spring piece is tightly fixed in the slingshot cup of the female buckle and shakes silently, the arc edge of the inner flanging edge enters, the straight sharp corner edge of the upper end face effectively delays separation of the male buckle, and the effect that the male buckle is easy to enter and difficult to exit is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of snap buckles, in particular to a snap buckle provided with a self-locking petal spring component which is easy to put in and difficult to take out. Background Art

[0002] A snap button is a fastening device used to fasten two objects together and is commonly used on products such as down jackets, denim shirts, windbreakers, waterproof mountaineering (outdoor) jackets, and fabric used on baby strollers. Among existing snap buttons, a more common type includes a male button and a female button. The male button includes a male button face and a male button bead, while the female button includes a female button face and a female button base (slingshot cup). The male button face is fixed to the clothing and riveted to the male button bead, while the female button face is fixed to the clothing and riveted to the female button slingshot cup. The female button slingshot cup has a linear annular spring ring inside it, and the sidewall of the male button bead has a groove that engages the annular spring ring. When the male and female buckles are fastened together, the male button bead enters the linear annular spring ring from the button bead head at the edge of the arc. The cross section of the linear annular spring ring is circular, which allows for smooth entry. When the male button bead enters, it stretches the linear annular spring ring. After the linear annular spring ring enters the groove of the male button bead, it elastically contracts, thereby locking the female and male buckles. In the aforementioned four-in-one buckle, the linear annular spring ring has a circular smooth surface on its outer surface and a groove on the outer wall of the male button bead. The groove bottom and the groove wall also form a certain arc surface transition. It is too smooth and lacks a strong snapping effect. The snapping force of the traditional four-in-one buckle is 2-3 times greater than the separation force. After being snapped in, it is easy to separate. If a strong separation force is required, an equally strong snapping force must be added. Obviously, it will be particularly strenuous when snapping in.

[0003] On the other hand, the existing female buckle using a linear ring spring ring has a reserved space for the spring ring to expand in the female buckle base (slingshot cup) when it is not fastened. As it shakes, it will produce noise, which affects the user experience in special use scenarios that require silence (such as hunting, reconnaissance, etc.). Therefore, it is necessary to further optimize and improve the existing snap buckle female buckle. Utility Model Content

[0004] In light of this, the present invention proposes a snap fastener with a self-locking petal spring element that is easy to insert but difficult to remove. This solves the persistent drawbacks of existing snap fasteners, which are difficult to insert and easy to remove, as well as the noise produced. The snap fastener significantly reduces the engagement force and significantly increases the separation force, providing a smoother and more comfortable user experience.

[0005] The technical solution disclosed in the utility model is a snap fastener with a self-locking petal spring element, which is easy to insert but difficult to remove. The snap fastener comprises a male buckle and a female buckle. The male buckle comprises a male buckle surface and a male buckle bead connected by riveting. The female buckle comprises a female buckle spring cup and a female buckle surface connected by riveting. The female buckle spring cup has a locking cavity for engaging the male buckle bead. The locking cavity of the female buckle spring cup has a self-locking petal spring element fixedly mounted therein. The self-locking petal spring element is a stamped annular metal sheet. The annular metal sheet comprises an annular side wall and an annular bottom wall that is bent inward 90 degrees perpendicular to the lower end of the annular side wall. The inner edge of the annular bottom wall is an annular flange with an upward chamfer of 90 degrees. The annular flange is uniformly provided with multiple notches to form a multi-petal inner flange. The outer wall of the male buckle bead is provided with an annular groove. When the male buckle bead is inserted into the locking cavity of the female buckle spring cup, the inner flange engages with the annular groove.

[0006] Furthermore, the annular flange edge of the self-locking petal spring is evenly provided with at least three cutouts, forming an inner flange edge of at least three petals. The upper end surface of the inner flange edge of the self-locking petal spring is a horizontal end surface, and the outer edge of the end surface forms a straight edge with a sharp angle.

[0007] Furthermore, the male buckle surface is composed of a buckle surface base surface stamped integrally by a metal sheet and a first hollow column extending vertically upward in the center of the buckle surface base surface; the male buckle button bead is composed of a button bead outer edge, an outer wall, an inner wall and a button bead inner edge stamped integrally by both sides of a metal sheet; the upper edge of the outer wall and the inner wall are connected by a circular arc surface transition; the male buckle surface is fixed on the object to be buckled, and then the first hollow column is inserted into the inner edge of the button bead, and the first hollow column is rolled back and tightly fastened to the inner edge of the button bead by riveting.

[0008] Furthermore, the position of the inner edge of the button bead is higher than the outer edge of the button bead, and the upper surface of the base surface of the buckle surface of the male buckle is a disc-shaped concave surface.

[0009] Furthermore, the cavity mouth of the fastening cavity of the female buckle slingshot cup is formed with a concave annular groove by stamping, and the self-locking petal spring part is fixed in the concave annular groove. The lower end edge of the concave annular groove is stamped into an inward chamfer to abut the bottom surface of the annular bottom wall of the self-locking petal spring part to enhance the deformation strength when the inner flip edge is separated from the annular recess.

[0010] Furthermore, the buckle surface of the female buckle includes a buckle surface body and an assembly meson, and the assembly meson includes a stamped integral assembly meson base surface and a second hollow column extending vertically upward in the center. The buckle surface body is buckled on the assembly meson base surface, and the edge of the buckle surface body is curled inward to wrap the edge of the meson base surface through stamping. The second hollow column is fixed on the object to be buckled, and then the second hollow column is inserted into the female buckle slingshot cup, and the second hollow column is rolled back and tightly buckled in the riveted through hole on the female buckle slingshot cup through riveting.

[0011] The snap fastener designed in this solution has the following beneficial effects:

[0012] 1. The core of this technical solution lies in the innovation of the female buckle in the snap fastener. A self-locking petal-type spring member is provided within the female buckle slingshot cup. This self-locking petal-type spring member is formed from an annular metal sheet stamped using a stamping process, forming an annular side wall and an annular bottom wall that is bent 90 degrees inward perpendicular to the lower end of the annular side wall. The inner edge of the annular bottom wall is an annular flange edge with an upward 90-degree chamfer. The annular flange edge is evenly provided with multiple notches to form a multi-petal flange edge. The 90-degree upward chamfered annular flange edge facilitates the smooth arc entry of the male button bead, making it easy to buckle in. After the male button bead enters the female buckle slingshot cup, the inner flange edge will be elastically opened by the notch. When it enters the annular groove position, it will elastically reset to achieve self-locking engagement in the annular groove position. In addition, the upper end face of the inner turned edge is a horizontal end face, and the outer edge of the end face forms a straight edge with a sharp angle. After the male buckle and the female buckle are fastened together, the straight edge with a sharp angle on the upper end face of the multi-petal inner turned edge of the self-locking petal spring part can effectively delay the separation of the male buckle, forming a four-button fastening effect that is easy to enter and difficult to exit.

[0013] 2. A self-locking petal spring is provided in the female buckle slingshot cup as a component for clamping the male buckle button bead. Compared with the existing linear annular spring ring, which will produce noise when shaking in the female buckle slingshot cup, the self-locking petal spring of this solution is tightly fixed in the female buckle slingshot cup, shaking silently, achieving a silent effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure decomposition of the utility model.

[0015] Figure 2 This is a schematic structural diagram of the self-locking petal spring component of the present invention.

[0016] Figure 3 This is a cross-sectional view of the assembly structure of the female buckle slingshot cup and the self-locking petal spring component of the utility model.

[0017] Figure 4 This is a cross-sectional view of the assembly structure of the male buckle surface and the male buckle bead of the utility model.

[0018] Figure 5 It is a cross-sectional view of the assembly structure of the female buckle surface and the female buckle slingshot cup of the present utility model.

[0019] Figure 6 This is a cross-sectional view of the structure of the disclosure and female buckle fastening of the utility model. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts are also within the scope of protection of the present disclosure.

[0021] Please refer to Figures 1 to 5 The present invention provides a snap fastener with a self-locking petal spring member, which is easy to insert but difficult to remove. The snap fastener comprises a male buckle and a female buckle. The male buckle comprises a male buckle surface 1 and a male buckle bead 2, which are riveted together. The female buckle comprises a female buckle spring cup 3 and a female buckle surface 4, which are riveted together. The female buckle spring cup 3 is provided with a fastening cavity for fastening the male buckle bead 2. A self-locking petal spring member 5 is fixed within the fastening cavity of the female buckle spring cup 3. The self-locking petal spring member 5 is a stamped annular metal sheet. The annular metal sheet comprises an annular side wall 51 and an annular bottom wall 52 that is bent inward at 90 degrees perpendicular to the lower end of the annular side wall 51. The inner edge of the annular bottom wall 52 is an annular flange edge that is chamfered and flanged upward at 90 degrees. The annular flange edge is evenly provided with multiple cutouts 521 to form a multi-petal inner flange edge 522. An annular groove 221 is provided around the outer wall of the male button bead 2 . When the male button bead 2 is buckled into the buckling cavity of the female slingshot cup 3 , the inner turned edge 522 is buckled and engaged with the annular groove 221 .

[0022] Preferably, the annular flange edge is evenly provided with at least three cutouts 521, forming at least three petals of the inner flange edge 522, and preferably the self-locking petal spring member 5 is evenly provided with six cutouts 521, forming six petals of the inner flange edge 522 ( Figure 2 shown).

[0023] Furthermore, the male buckle surface 1 is composed of a buckle surface base surface 11 punched integrally from a metal sheet and a first hollow column 12 extending vertically upward from the center of the buckle surface base surface 11; the male buckle button bead 2 is composed of a button bead outer edge 21, an outer wall 22, an inner wall 23 and a button bead inner edge 24 punched integrally from the upper and lower surfaces of a metal sheet; the upper edge of the outer wall 22 and the inner wall 23 are connected by a circular arc surface transition; the male buckle surface 1 is fixed on the object to be buckled, and then the first hollow column 12 is inserted into the button bead inner edge 24; and the first hollow column 12 is rolled back and fastened to the button bead inner edge 24 by riveting.

[0024] Please refer to Figure 4 Preferably, the position of the inner edge 24 of the button bead is higher than the outer edge 21 of the button bead, and the upper surface of the base surface 11 of the male buckle surface 1 is a disc-shaped concave surface. By forming a disc-shaped concave surface and the inner edge 24 of the button bead being higher than the outer edge 21 of the button bead, when the male buckle surface 1 is riveted onto the fastened fabric, textile and other materials, these materials are more firmly fastened to the materials through the disc-shaped concave surface.

[0025] Please refer to Figure 2 、 Figure 3 、 Figure 6 The upper end face of the inner turning edge 522 is horizontal, and the annular turning edge with a 90-degree chamfered bead is conducive to the smooth arc surface when the male button bead 2 enters. The inner turning edge 522 can be elastically opened by being provided with a notch 521, and when entering the annular groove position 221, it will elastically reset and be locked in the annular groove position 221. In addition, the inner turning edge 522 is formed by the inner edge of the annular bottom wall 52 being chamfered and turned upward by 90 degrees. Its upper end face is horizontal, and the outer edge of this end face forms a straight edge and a sharp angle, not a curled edge. Therefore, after the female buckle and the male buckle are fastened and separated, the upper end face of the inner turning edge 522 is against the groove wall of the annular groove position 221. The straight edge and sharp angle effectively delay the separation of the male buckle, forming a four-piece buckle fastening effect that is easy to enter and difficult to exit.

[0026] Please refer to Figures 1 to 3 、 Figure 5 The cavity opening of the fastening cavity of the female buckle slingshot cup 3 is formed with a concave annular groove 31 by stamping, and the self-locking petal spring component 5 is fixed in the concave annular groove 31. The lower end edge of the concave annular groove 31 is stamped into an inward chamfer to abut against the bottom surface of the annular bottom wall 52 of the self-locking petal spring component 5 to enhance the deformation strength when the inner flange edge 522 is separated from the annular groove position 221.

[0027] Furthermore, the female buckle buckle surface 4 includes a buckle surface body 41 and an assembly meson 42, wherein the assembly meson includes an assembly meson base formed by stamping and a second hollow column 421 extending vertically upward from the center. The buckle surface body 41 is buckled onto the assembly meson base, and the edge of the buckle surface body 41 is rolled inward to wrap around the edge of the assembly meson base by stamping. The second hollow column 421 is fixed to the object to be buckled, and then the second hollow column 421 is inserted into the female buckle slingshot cup 3, and the second hollow column 421 is rolled back and fastened to the riveted through hole on the female buckle slingshot cup 3 by riveting. The female buckle buckle surface adopts a two-piece component combination design, wherein the buckle surface body 41 can adopt different buckle surface styles, and different buckle surface styles are combined with the same assembly meson 42 to form different four-piece buckle styles.

[0028] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A snap buckle with a self-locking petal spring element that is easy to enter and difficult to exit, comprising a male buckle and a female buckle, wherein the male buckle comprises a male buckle buckle surface (1) and a male buckle button bead (2) connected by riveting, and the female buckle comprises a female buckle slingshot cup (3) and a female buckle buckle surface (4) connected by riveting, and the female buckle slingshot cup (3) is provided with a fastening cavity for fastening the male buckle button bead (2), and is characterized in that: A self-locking petal spring component (5) is fixed in the fastening cavity of the female buckle slingshot cup (3), and the self-locking petal spring component (5) is a stamped annular metal sheet, and the annular metal sheet includes an annular side wall (51) and an annular bottom wall (52) bent inward 90 degrees perpendicular to the lower end of the annular side wall (51), and the inner edge of the annular bottom wall (52) is an annular flange edge with an upward 90-degree chamfer, and the annular flange edge is evenly provided with a plurality of cuts (521) to form a multi-petal inner flange edge (522). An annular groove (221) is provided around the outer wall of the male button bead (2); when the male button bead (2) is buckled into the buckling cavity of the female slingshot cup (3), the inner turned edge (522) is buckled and engaged with the annular groove (221).

2. The easy-in, hard-out snap fastener with a self-locking petal spring member according to claim 1, characterized in that: The annular flange edge of the self-locking petal spring member (5) is evenly provided with at least three cutouts (521), forming an inner flange edge (522) with at least three petals.

3. The easy-in, hard-out snap fastener with a self-locking petal spring member according to claim 2, characterized in that: The upper end surface of the inner turned edge (522) of the self-locking petal spring member (5) is a horizontal end surface, and the outer edge of the end surface forms a straight edge with a sharp angle.

4. The easy-in, hard-out snap fastener with a self-locking petal spring member according to claim 1, characterized in that: The male buckle surface (1) is formed by a buckle surface base (11) formed by stamping a metal sheet and a first hollow column (12) extending vertically upward in the center of the buckle surface base (11); the male buckle bead (2) is formed by stamping a metal sheet from the upper and lower surfaces to form a button bead outer edge (21), an outer side wall (22), an inner side wall (23) and a button bead inner edge (24); the upper edge of the outer side wall (22) and the inner side wall (23) are connected by a circular arc surface transition; the male buckle surface (1) is fixed on the object to be fastened, and then the first hollow column (12) is inserted into the button bead inner edge (24); and the first hollow column (12) is rolled back and fastened to the button bead inner edge (24) by riveting.

5. The easy-in, hard-out snap fastener with a self-locking petal spring member according to claim 4, characterized in that: The position of the inner edge (24) of the button bead is higher than the outer edge (21) of the button bead, and the upper surface of the buckle surface base surface (11) of the male buckle buckle surface (1) is a disc-shaped concave surface.

6. The easy-in, hard-out snap fastener with a self-locking petal spring according to claim 1, characterized in that: The cavity opening of the fastening cavity of the female buckle slingshot cup (3) is formed with a concave annular groove (31) by stamping, and the self-locking petal spring component (5) is fixed in the concave annular groove (31). The lower end edge of the concave annular groove (31) is stamped into an inward chamfer to abut against the bottom surface of the annular bottom wall (52) of the self-locking petal spring component (5) to enhance the deformation strength when the inner turned edge (522) is separated from the annular groove position (221).

7. The easy-in, hard-out snap fastener with a self-locking petal spring member according to claim 1, characterized in that: The female buckle buckle surface (4) includes a buckle surface body (41) and an assembly meson (42), wherein the assembly meson includes an assembly meson base surface formed by stamping and a second hollow column (421) extending vertically upward from the center. The buckle surface body (41) is buckled on the assembly meson base surface, and the edge of the buckle surface body (41) is rolled inward to wrap the edge of the assembly meson base surface by stamping. The second hollow column (421) is fixed on the buckled object, and then the second hollow column (421) is inserted into the female buckle slingshot cup (3), and the second hollow column (421) is rolled back and fastened to the riveted through hole on the female buckle slingshot cup (3) by riveting.

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